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ENGINEERING DESIGN STANDARDS

TABLE OF CONTENTS

SECTION I INTRODUCTION.....1 PURPOSE.....1 PLAN PREPARATION.....1 DEFINITIONS.....3 SECTION II GRADING PLANS .....1 GENERAL .....1 SUBMITTAL REQUIREMENTS .....1 PLAN PREPARATION .....3 GRADING GENERAL NOTES .....7 GRADING DESIGN CRITERIA .....12 TEMPORARY EROSION CONTROL DESIGN CRITERIA.....13 GRADING PLAN CHECK LIST .....16 EXAMPLE OF ACCEPTANCE LETTER .....21 SECTION III GEOTECHNICAL REPORTS.....1 FEASIBILITY EVALUATION.....1 DESIGN PHASE.....2 GEOTECHNICAL REPORT.....3 FINAL REVIEW.....8

SECTION IV

STREET IMPROVEMENT PLANS ..... 1 GENERAL ..... 1 GEOMETRICS ..... 1 SUBMITTAL REQUIREMENTS ..... 4 PLAN PREPARATION ..... 5 STREET PLANS GENERAL NOTES ..... 11 DESIGN ..... 14 STREET IMPROVEMENT PLAN CHECKLIST ..... 17 STREET IMPROVEMENT PLAN CHECKLIST ..... 18 STREET IMPROVEMENT PLAN CHECKLIST ..... 21 GUIDELINES FOR CURB, GUTTER & SIDEWALK ..... 23 STANDARD STREET SECTIONS ..... 27 SECTION V DRAINAGE MANAGEMENT PLAN ..... 1 INTRODUCTION ..... 1 HYDROLOGIC PROTECTION LEVELS ..... 2 HYDROLOGIC DESIGN STANDARDS AND PROCEDURES ..... 3 HYDRAULIC STANDARDS AND PROCEDURES ..... 5 PEAK FLOW REDUCTION FACILITIES ..... 10 PERCOLATION TEST PROCEDURE ..... 14 NUISANCE WATER MANAGEMENT ..... 19 DEFINITIONS ..... 23 HYDROLOGY CHECK LIST ..... 25 SECTION VI LANDSCAPING ..... 1 GENERAL REQUIREMENTS ..... 1 SUBMITTAL REQUIREMENTS ..... 1 PLAN PREPARATION ..... 2 GENERAL NOTES ..... 4 DESIGN CRITERIA ..... 6 GENERAL REQUIREMENTS ..... 6 IRRIGATION ..... 6 IRRIGATION NOTES ..... 10

PLANTING ..... 13 PLANTING NOTES ..... 18 SLOPE EROSION CONTROL ..... 21 SUBMITTAL REQUIREMENT CHECK LIST ..... 24 TITLE SHEET CHECK LIST ..... 25 LANDSCAPE PLAN CHECKLIST ..... 26 IRRIGATION CHECKLIST ..... 27 PLANTING CHECKLIST ..... 28 SLOPE EROSION CONTROL CHECKLIST ..... 30 SECTION VII SANITARY SEWER PLANS ..... 1 GENERAL ..... 1 SUBMITTAL REQUIREMENTS ..... 2 PARTICIPATION LETTER ..... 10 UNDERGROUND LETTER ..... 11 GENERAL NOTES ..... 12 SECTION VIII WATER PLANS ..... 1 GENERAL ..... 1 SUBMITTAL ..... 1 SECTION IX STREET LIGHTING PLANS ..... 1 GENERAL ..... 1 SUBMITTAL REQUIREMENTS ..... 1 SECTION X STANDARD DRAWINGS ..... 1 Standard No. ..... 1 C-1 Residential Driveway C-2 Industrial & Commercial Driveway C-3.1 Residential Driveway (Alternate Sections) C-3.2 Industrial & Commercial Driveway (Alternate Sections)

M-1 Barricade Type "III" M-3.1 Blockwall Detail (6' height) M-3.2 Blockwall Detail (cantilever section) M-4 Drainage Basin Fencing and Gate (sht. 1 of 2) M-4 Drainage Basin Fencing and Gate (sht. 2 of 2) M-5.1 Standard Street Name Sign M-5.2 Standard Street Name Sign M-5.3 Standard Street Name Sign M-6.1 Backfill and AC Repair M-6.2 Backfill and AC Repair M-7.1 Sample Title Sheets M-7.2 Sample Title Sheets M-8.1 Symbols and Abbreviations M-8.2 (VACANT) M-8.3 Symbols and Abbreviations P-1.1 Approved Plant Material - Tree List P-1.2 Approved Plant Material - Street Tree List P-2.1 Approved Plant Material - Hardy Large Shrubs P-2.2 Approved Plant Material - Hardy Small Shrubs P-3 Approved Plant Material - Hardy Perennials and Sub Shrubs for Color Accents P-4 Approved Plant Material - Hardy Ground Covers P-5 Approved Plant Material - Hardy Vines P-6 Approved Plant Material - Desert Plants S-1.1 Typical Street Section S-1.2 Typical Street Section S-1.3 Typical Street Section S-2 Street Cross -Fall S-3.1 Curb and Gutter, 8" C.F. (VACANT) S-3.2 Curb and Gutter, 6" C.F. (VACANT)

ENGINEERING DESIGN STANDARDS

SECTION I

INTRODUCTION

A. PURPOSE

The purpose of these Standards is to provide certain minimum standards for the design, construction, repair and alterations of streets, roadways, alleys, drainage, grading, sewerage, water supply facilities and all appurtenances thereto, within the City of Palmdale, where any portion of such improvement is to be turned over to the City of Palmdale for operation and/or maintenance.

Complete plans for all improvements including any necessary dedications and easements shall be submitted to the Office of the City Engineer for approval and must receive the required approval prior to the beginning of construction of any such improvements. This shall apply to any project where the City Engineer has jurisdiction. Such plans shall be prepared by, or certified by, a Registered Civil Engineer licensed to practice in California in accordance with the provisions of the "Professional Engineer's Act", Chapter 7 of the Business and Professions Code, relating to the practice of Civil Engineering.

B. PLAN PREPARATION

All Construction plans to be approved by the City Engineer shall be prepared in accordance with the following guidelines. Any items which are not included in these Standards shall be designed in accordance with the latest edition of the following publications

1. Subdivision and Zoning Ordinances of the City of Palmdale as defined in Section 1,B.
2. Latest adopted edition of the Palmdale Building Code, Title 15.

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3. Standard Plans for Public Works Construction and Standard Specifications for Public Works Construction, currently adopted editions, published by Building News, Inc., 3055 Overland Avenue, Los Angeles, CA. 90034.
4. Highway Design Manual of Instructions issued by the Los Angeles County Road Department, current edition.
5. Standard Plans of the Los Angeles County Road Department, current edition.
6. Hydrology Manual issued by the Los Angeles County Flood Control District, current edition.
7. Design Manual and Standard Drawings of the Los Angeles County Flood Control District, current edition.
8. Uniform Building Code, currently adopted edition, published by International Conference of Building Officials, 5360 South Workman Mill Road, Whittier, California, 90601.
9. Highway Design Manual of Instructions, current edition, issued by the State of California Department of Transportation (CALTRANS).
10. Standard Plans, current edition, issued by the State of California Department of Transportation (CALTRANS).
11. Standard Specifications, current edition, issued by the State of California Department of Transportation (CALTRANS).
12. City of Palmdale Standard Landscaping Plant List.
13. The above publications are listed in the order of precedence. The City Engineer may approve modifications to these Standards on a case by case basis.

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C. DEFINITIONS

In these Standards, the intent and meaning of the terms that are used shall be as defined in Section I of the Standard Specifications for Public Works Construction (also known as the Green Book), published by Building News, Inc. 3055 Overland Avenue, Los Angeles, CA 90034, except as herein below specifically noted, revised or added.

1. CITY - Shall mean the City of Palmdale, a municipal corporation.
2. CITY ENGINEER - Shall mean the City Engineer of the City of Palmdale, California.
3. CONSULTING ENGINEER - Any person or persons, firm, partnership, or corporation legally authorized to practice Civil Engineering in the State of California who prepares or submits improvement plans and specifications to the Department of Public Works of the City of Palmdale for approval.
4. DESIGN - Shall mean site grading, x-section, street alignment, grade, geometric section, structural section; sanitary sewer alignment, grade, size; water system alignment, size, valving, fire hydrant location; storm drain alignment, grade, size and miscellaneous improvements as required by the City Engineer.
5. DEVELOPER - Shall mean any person, firm, corporation, partnership or association engaged in the development of property in part or in whole by the placing of any improvements thereon, whether the property was previously developed in whole, in part, or at all.
6. EASEMENT - Shall mean an easement dedicated to the City or Public Utility which shall be continuing and irrevocable unless formally abandoned.
7. ENGINEERING GEOLOGIC-REPORT - Shall mean a report prepared by any person or persons, firm, partnership, or corporation legally licensed to prepare "Engineering Geologic Reports" in the State of California.

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8. ENGINEERING GEOLOGIST - Shall mean a geologist experienced and knowledgeable in engineering geology.
9. GEOTECHNICAL ENGINEER - See SOILS ENGINEER.
10. GEOTECHNICAL ENGINEERING REPORT - Shall mean a report prepared by any person or persons, firm, partnership or corporation legally licensed to prepare "Geotechnical Engineering Reports" in the State of California.
11. GEOTECHNICAL REPORT - Shall mean a report that includes an "Engineering Geologic Report" and a "Geotechnical Engineering Representative.
12. IMPROVEMENTS - Refers to street work, sidewalk, curb, gutter, driveways, water mains, sanitary sewer, storm drainage, drainage basins, public utilities, street lights, landscaping, irrigation systems and fences to be installed by the developer on land to be used for public right of way.
13. MANUAL OF TRAFFIC CONTROLS - Shall mean the current edition the "Manual of Traffic Controls for Construction and Maintenance Work Zones" of the State of California, Department of Transportation (CALTRANS). edition.
14. SOILS ENGINEER - Shall mean an engineer experienced and knowledgeable in the practice of soils engineering and legally authorized to practice soil engineering in the State of California.
15. STANDARD DETAILS AND SPECIFICATIONS - Shall mean the publications listed above in Section IA.
16. STATE SPECIFICATIONS - Shall mean the current edition of the Standard Specifications of the State of California Department of Transportation (CALTRANS).
17. SUBDIVISION ORDINANCE - Shall mean Title 16 of the Municipal Code as adopted by the City Council of the City of Palmdale.

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A. GENERAL

SECTION II GRADING PLANS

This division establishes the minimum acceptable standard for design and preparation of grading plans for approval by the City of Palmdale.

All grading must conform to the Los Angeles County Building Code as adopted and modified by the City of Palmdale and hereafter referred to as the City Grading Ordinance.

Submittals are also necessary to ensure that on-site drainage is adequately handled, that offsite drainage at ultimate development in accordance with the current general plan, is conveyed through the project; and that the proposed development grading plans are compatible with adjacent property topography.

This section of the manual specifies the requirements of grading plans for private developments. It includes items pertinent for the City's review and reflects established professional engineering practice for preparation of grading plans.

Prior to submittal, a Registered Civil Engineer must stamp each sheet of plans, calculations/reports and indicate license number and expiration date. Unsealed plans will not be accepted for plan checking. Final (ready for approval) plans and reports will need to be signed by the Engineer prior to City Approval.

B. SUBMITTAL REQUIREMENTS

All prints submitted shall be folded to a size no larger than 9" x 12".

1. The initial submittal of a Grading Plan for review shall include the following which shall be submitted to the City Engineer's Office:
2. a.Grading plan - 5 copies

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• b.Soils report - 1 copy
• c.Hydrology/Hydraulic report - 2 copies
• d.Percolation report - 1 copy
• e.All Approved Conditions of Approval - 1 copy
• f.Approved Tentative Tract map/ Tentative Parcel map or Site plan (SPR, CUP) - 1 copy (as applicable)
• g.Earthwork calculations - 1 copy
• h.Retaining wall calculations (if applicable) - 2 copies
• i.Itemized construction estimate
• j.Fees
• Subsequent submittals to the City shall include:
• a.The previous marked up check prints
• b.Revised plans - 2 copies
• c.Previously checked Hydrology/Hydraulic Report
• d.Revised Hydrology/Hydraulic Report - 2 copies
• e.Any additional material requested by the plan checker
• At the same time the initial submittal is made to the City, the following item should be submitted to the City's Geologist.
• a.Grading plan - 1 copy
• b.Soils report - 1 copy

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• c.Percolation report - 1 copy
• d.Dry well calculations - 1 copy
• Subsequent submittal to the City's Geologist shall be as required.
• Prior to approval of grading plan:
• a.Right of entry for any grading on adjacent properties. Permission to be in letter form signed by adjacent property owner and notarized. A form is available at the City Engineer's Office. This is required even if the owner of the impacted property is the developer of the subject project.
• b.Drainage acceptance letter or easement from the owners of all affected properties. This is required even if the owner of the impacted property is the developer of the subject project.
• c.Clearance from the City's Geologist.
• d.Approval for compliance by the Planning Department

C. PLAN PREPARATION

1. The plan size shall be 24" x 36", ink on 3 mil mylar and minimum scale 1" = 40'. Margins shall be 1.5" on the left edge and 1" on the other three sides. Deviations from sizing criteria must be approved by the Engineering Division.
2. The first sheet shall be a title sheet and include:
3. a.Location map showing the following:
1. Project location
2. Major cross streets
3. City Limit lines if near the project
4. North arrow
5. Scale
6. b.Index map showing the following:
1. Street configuration within the project
2. Lot configuration and numbers (include entire tentative tract or development)

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3. Project boundaries
4. Street names
5. Index of sheets
6. City Limit lines if contiguous to project
7. North arrow
8. Scale: 1" = 200'
9. Drainage facilities including drywell locations
10. Direction of flow in each street
11. c.Title block containing the Tract number and Tentative Tract number if applicable; phase number if applicable purpose of grading (rough, precise, etc.) and site address.
12. d.Benchmark - Los Angeles County number, description, location, date (year of adjustment), and elevation to three decimal places.
13. e.Engineering firm's name, address, telephone number, date of plan preparation, stamp and signature of Registered Civil Engineer responsible for design.
14. f.Name, address and telephone number of owner, developer, soils engineer and engineering geologist.
15. g.Signature and stamp of soils engineer and engineering geologist (as required). (Approval by City's geologist is required prior to approval by City Engineer.)
16. h.Checked By block for Plan Checker, Recommended By block and Approval block for City Engineer's signatures with dates, and for other agencies as appropriate. Also include on the face sheet the Planning Department Compliance Block.
17. i.Revision block with revision number, date, initials of design engineer, description of plan change, and spaces for City approval and date. All revisions within the plan shall be referenced on the title sheet.
18. j.Applicable General Notes
19. k.Complete list of construction notes with quantities for all items to be constructed per the grading plan and requiring inspection.

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1. Cubic yardage of cut, fill, over-excavation and backfill, export and import.
2. m.. Legend and symbols.
3. n.Detail of typical lot drainage.
4. o.Reference to any Geotechnical Engineering Report and/or Engineering Geologist Report.
3. The sheets following shall clearly delineate the grading of the project and shall include the following:
4. a.Precise location of all existing buildings, structures, trees, cesspools, septic tanks, and wells on the property.
5. b.The location of any building or structure or other significant feature within 15' of the project.
6. c.All existing and proposed easements for drainage devices, roadways and utilities easement should be official record book and page.
7. d.Accurate contours or spot elevations indicating the topography of the existing ground. Contours or spot elevations must be shown beyond the property line of the site being graded to properly indicate existing drainage patterns.
8. e.Finish grades by contours and/or spot elevations indicating proposed drainage patterns and grading. Show finish grade elevations at corners of all structures, BCR, ECR, B.C., E.C., BVC, EVC and grade breaks. For precise grading plans show pad and finished floor elevations.
9. f.Daylight lines of all cuts and fills. Make them continuous and obvious.

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• g.Where excess dirt is to be placed.
• h.Building or structure setbacks per approved site plan.
• i.All drainage structures and reference to street or storm drain plans for construction details.
• j.Location and complete details of any detention, retention or retarding basins and drywells.
• k.Top and toe of all cut and fill slopes and setback from permit boundary.
• Location and complete details of subdrainage systems according to approved soils report.
• m.Signature blocks; Recommended By and Checked By on all sheets. City Engineer Approval block only on the Title Sheet/Face Sheet).
• n.Show locations and structural details of all walls, both retaining walls and free standing walls. All wall details are to be shown on the grading plan only.
• o.North arrow and scale, $1" = 40'$ minimum, include bar scale.
• If construction occurs between November 1 to April 15, then the last sheet of the Grading Plan set shall be an erosion control plan (one sheet only). See Section 2-E (Page II-13) for more details.

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GRADING GENERAL NOTES

• I All work shall be done in accordance with the excavation and building code of the City of Palmdale and any special requirements of the permit. Any violation will result in the stoppage of all work until the violation is corrected.
• The developer's engineer shall exercise sufficient supervisory control during grading and construction to ensure compliance with the approved plans and in accordance with section 7014, Engineering Grading, of the City Building Code.
• No work shall be started without first notifying the Grading Inspector at (661)267-5255 at least 48 hours before work is commenced.
• Slopes shall be no steeper than 2 horizontal to 1 vertical, or as determined by the Soils Engineer and approved by the City Geologist.
• Fills shall be compacted throughout to at least 90% of the maximum dry density as determined by A.S.T.M. Soil Compaction Test D1557-78.
• The developer's Soils Engineer shall certify that the required inspections and tests have been performed and that such tests comply with the code.
• Fill areas shall be cleared of all vegetation and debris, scarified, have subdrains installed (if any) and approved by the Grading Inspector and Soils Engineer prior to the placing of fill.
• Approved protective measures and temporary drainage provisions must be used to protect adjoining properties during the Grading Project.
• Dust shall be controlled by watering to the satisfaction of the Grading Inspector.
• After all work, including the installation of drainage structures and protective devices, has been completed and required reports have been submitted, the permittee shall request a Rough Grading Inspection from the City of Palmdale Engineering, Department.

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11. All public streets shall be maintained free of dust and mud caused by grading operations.
12. All cesspools, septic tanks, etc., to be abandoned shall be filled or removed in accordance with the City of Palmdale Standards and Certified by the Soils Engineer.
13. Any existing wells to be abandoned shall be capped in accordance with Los Angeles County Health Department regulations.
14. The Developer's Engineer shall set grade stakes for all drainage devices and the contractor must obtain inspection before placing concrete.
15. Not less than one Field Density Test will be made for each 2 feet vertical of fill, nor less than one such test for each 1,000 cubic yards of material placed.
16. Finish Grading will be completed and approved, and Slope Planting and Irrigation Systems installed before Occupancy of Building.
17. Estimated Cut = Cubic Yards. Estimated Fill = Cubic Yards.
18. These quantities are raw numbers only. See Earthwork Breakdown on this sheet for estimated losses due to grubbing, processing and compaction.
18. Field density will be determined by the Sand-Cone method A.S.T.M. D1556-82. In fine-grained cohesive soils, field density may be determined by the Nuclear Density method A.S.T.M. D2922 & D3017 provided not less than 10% of the required Density Tests uniformly distributed are by the Sand-Cone method. The method of determining Field Density and location and approximate elevation shall be shown in the Compaction Report. Other methods may be used if recommended by the Soils Engineer and approved in advance by the Building Official.
19. No rock or similar material greater than 6" in diameter will be placed in the fill unless recommendations for such placement have been submitted by the Soils Engineer in advance and approved by the City Engineer.

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20. Density Tests will be made at points approximately 1 foot below the fill slope surface on the basis of one test for each 1,000 square feet of slope surface but not less than one test for each 10 feet vertical of slope height.
21. All storm drain work is to be done under the supervisory control of the Grading Engineer. Weekly Status Reports shall be submitted by the Supervising Grading Engineer to the City Inspector.
22. Contours shown represent original ground. Intervals shown shall be appropriate for plans, however, no interval shall be greater than 2 feet.
23. Expected date for start of grading ___ Expected date for completion of grading ___
24. The undersigned Civil Engineer certifies this grading work will be supervised in accordance with Section 7014 entitle "Engineering Grading", of the City Building Code.
25. Name RCE #
26. Expiration Date
25. The Soils Engineer must approve all grading including the stability of any slopes created, existing or remaining.
26. Comply with all requirements of the Soils Report dated _____ by _____.
27. The Private Engineer signing these plans is responsible for assuring the accuracy and acceptability of the work hereon. In the event of discrepancies arising during construction, the Private Engineer shall be responsible for determining an acceptable solution and revising the plans for review and approval by the City.
28. This Grading Plan has been reviewed, and conforms to recommendations by:

Name of Soils Engineer Signature of Soils

Exp. Date & Stamp

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29. All pads are graded flat at rough grading with drainage swales at a minimum slope of 1% towards the street or designed drainage outlet.
30. The front drive approach shall not exceed a slope of 14%.
31. “All drywells shown on this project shall be maintained by the owners where their locations are on private property or through the creation of a Landscape Benefit Assessment District when approved by the City. Drywells will be replaced by the owners when they cease to drain standing surface water in a 24 hour period or are deemed to be obsolete by the City. Regular Maintenance of the drywell settling chamber is required to achieve proper operation of the drywell and shall be performed annually or more often depending upon its location, and shall be performed by the owner or district as applicable.”
32. "All drywells shall be constructed per City of Palmdale Standards."
32. Temporary Erosion Control Plans shall be submitted prior to October 1. The control devices shown on said plans shall be installed prior to November 1 and maintained in operable condition until April 15.
33. TEMPORARY EROSION CONTROL:
34. a)The surface of all slopes more than three (3) feet in vertical height and steeper than 5:1 shall be covered with City of Palmdale approved erosion control blankets. Installation shall conform to manufacturer's specifications. Deviations from this requirement shall be submitted in writing with an alternative plan for temporary erosion control. This plan shall be approved by the City Engineer.
35. b)Installation of the erosion blankets shall be installed to the satisfaction of the City of Palmdale landscape architect prior to acceptance of rough grading and shall be per the manufacturer's specifications.
34. PERMANENT EROSION CONTROL:
35. a)The surface of all slopes more than three (3) feet in vertical height shall be covered with North American Green S-150 or approved erosion control blankets. Installation shall conform to manufacturer's specifications.

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• b)The surface of all slopes more than three (3) feet in vertical height shall be protected against damage by erosion by planting with ground cover plants. Slopes exceeding fifteen (15) feet in vertical height shall also be planted with trees, spaced at not more than 20 feet on center.
• c)Slopes required to be planted shall be provided with an approved system of irrigation.
• d)All required landscaping and irrigation shall conform to the City of Palmdale's Slope Erosion Control Landscaping Standards.
• e)All planting and irrigation shall be installed to the satisfaction of the City of Palmdale landscape architect prior to the acceptance of final grading. Contact landscape architect at (661) 267-5255 for inspection within a minimum of twenty-four (24) hours notice.
• PRIVATE ENGINEER'S NOTICE TO CONTRACTOR
• The existence and location of any underground utility pipes, conduits or structures shown on these plans was obtained by a search of the available records. To the best of our knowledge, there are no existing utilities except as shown on these plans. The contractor is required to take due precautionary measures to protect the utility lines shown on these drawings. The contractor further assumes all liability and responsibility for the utility pipes, conduits or structures shown or not shown on these drawings. The contractor shall pothole all existing utilities to verify the location and any discrepancy between the plans shall be brought to the attention of the Design Engineer.

Contractor agrees that he shall assume sole and complete responsibility for the job site condition during the course of construction of this project, including safety of all persons and property and that this requirement shall apply continuously and not be limited to normal working hours. The contractor also agrees to defend, indemnify and hold the owner and the engineer harmless from any and all liability, real or alleged in connection with the performance of work on this project, excepting for liability arising from the sole negligence of the owner or the engineer.

ENGINEER'S SIGNATURE R.C.E. DATE (Print Name) under signature line

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D. GRADING DESIGN CRITERIA

Grading shall conform to Chapter 70 of the City of Palmdale Building Code and the following criteria. In case of a discrepancy, the following criteria shall govern.

• I.Drainage
• a.Minimum Gradients for residential sites:
• Dirt, grass, etc. 1.0%
• Fine graded residential lot - dirt 2.0% sheet flow away from building pad for minimum of 3', pad shall be at least 0.3' above high point of swale.
• b.Minimum gradients for flat land industrial sites:
• Earth at rough grade stage 0.5%
• Earth fine grade 1.0%
• Asphalt Pavement (sheet flow) 1.0%
• Concrete Pavement (sheet flow) 1.0%
• Concrete drain in earth area 0.5%
• Concrete gutter in paved area 0.4%
• Maximum gradient for sheet flow 20.0%
• c.Design for water to flow to nearest practical street, storm drain or natural watercourse. Cross lot drainage is to be avoided.
• d.Show design and location of all drainage devices.
• e.Drainage shall not sheet flow over the top of any slopes steeper than 5:1.
• f.For residential lots, swales shall be 3 feet minimum from building pad.
• g.Common side yard swales are not acceptable.

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2. Slopes

• a.Slopes shall be designed with full consideration of landscaping requirements. Cut and fill slopes shall be no steeper than 2 horizontal to 1 vertical.
• b.Drainage shall be directed away from the faces of cut and fill slopes or into approved drainage structures. The faces of cut and fill slopes shall also be manufactured to control erosion. This control may consist of stepping or other surface protection, as approved by the City Engineer. The protection for the slopes shall be installed within 15 days after completion of the rough grading.
• c.Slopes required to be planted shall be provided with an approved system of irrigation. See Section VI for details.
• d.Recommendations in the soils report shall be incorporated into the design of any slope.

E. TEMPORARY EROSION CONTROL DESIGN CRITERIA

Temporary Erosion Control Plans shall be submitted prior to October 1. The control devices shown on said plans shall be installed prior to November 1 and maintained in operable condition until April 15.

Temporary Erosion Control Plans shall provide for the following:

1. Temporary soils stabilization measures shall be installed on slopes graded at 10:1 or steeper, and/or 10 feet or more in height. Contact the City's Landscape Architect for the approved methods of soil stabilization and planting mixes.
2. Desilting facilities at all drainage inlets for the graded site shall be designed for a 25-year storm intensity. They must be detailed on the plan. Design and specific recommendations shall be submitted for the following:
3. a.Desilting basin volume based on gradient, inflow, and nature of soils.
4. b.Distribution extent of all graded areas and identification of any temporary soil stabilization measures.
5. c.Size of desilting basin outlet pipe and nonerosive overflow.
6. d.Dike requirements; dimensions, percent compaction, etc.

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3. The following notes shall be placed on the Erosion Control plans:
4. a.In case of emergency call _____
5. b.A standby crew for emergency work shall be available at all times. Necessary materials shall be available on-site and stockpiled at convenient locations to facilitate rapid construction of temporary devices or to repair any damaged erosion control measures.
6. c.Erosion control devices shall not be moved or modified without the approval of the City Engineer.
7. d.All removable protective devices shown shall be in place at the end of each working day in the period from October 1 through April 15, and at any other period when the weather forecast indicates a greater than 50% probability of rain.
8. e.After a rainstorm, all silt and debris shall be removed from check berms and desiliting basins. Any graded slope surface protection measures damaged during the rainstorm shall also be repaired immediately.
9. f.Fill slopes at the project perimeter must drain away from the top of the slope at the conclusion of each working day.
10. g.A six-foot high perimeter fence or a 24-hour guard shall be posted on the site whenever the depth of water in any device exceeds 18 inches.
4. Placement of devices to reduce erosion damage within the project must be shown on the plan. Stockpile locations for materials shall also be indicated on the drawing.
5. Outlet conditions from the desilting basin shall not exceed downstream limitations. The overflow shall be designed to safely pass 1.5 times the 25-year peak discharge.

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6. A construction entrance shall be installed prior to commencement of grading. Location of the entrance may be adjusted by the contractor to facilitate grading operations. All construction traffic entering the paved road must cross the construction entrance. The construction entrance shall consist of a bed of 3/4" gravel of the following minimum dimensions: 15' wide, 30' long and 12" deep. The construction entrance shall be removed prior to placing base for paving.

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GRADING PLAN CHECK LIST TITLE SHEET

*Requires special attention by checker.

[ ] 24" x 36" SHEET SIZE

[ ] BENCHMARK - County of Los Angeles, Palmdale Quad, elevation, location, benchmark number, description, date of adjustment. Temporary B.M. shall be set at 1000' grids to be utilized during grade checking.

[ ] TITLE BLOCKS - tract number and Palmdale number (bottom right and right margin), sheet number, phase, rough or final, City Engineer "approved by" "checked by", "recommended by", "Planning Department compliance" signature blocks ; name, address and phone for owner, developer, design engineer, soils engineer, geologist, revision block, list of items on sheet.

[ ] KEY MAP - scale 1" = 200', north arrow up, flow arrows, street names, street widths, dry well locations, lot lines and numbers, retention/detention basin location, key to sheet numbers, adjoining tract numbers, City Limits.

[ ] VICINITY MAP - Highway names, City Limits, north arrow up.

[ ] Engineers seal, expiration date, signature, date signed.

[ ] Legend and Symbols.

[ ] Job Address (where applicable).

[] * Offsite grading for drainage and slopes - need Drainage Acceptance Letter and/or Cut/Fill Acceptance Letter or easement recorded. (examples on II-21 & II-22)

[ ] General Notes (Reference pages II-7 thru II-11).

[ ] Private Engineer's Notice to Contractor.

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[ ] Private Engineer's Responsibility Statement.

[ ] Earthwork volumes - cut, fill, over-excavation, backfill, export and import. Backup calculations and cross sections should be provided.

[ ] Details - sideyard swales, paved swales, rear yard swales, rough grade section, berm section, wall section, typical lot grading.

[ ] Has a Storm Water Pollution Prevention Plan (SWPPP) been prepared? Prior to issuance of a Grading Permit, the applicant shall file a Notice of Intent with the Lahontan Region of the California Regional Water Quality Control Board to comply with the applicable National Pollution Discharge Elimination System (NPDES) requirements.

II-17

GRADING PLAN CHECKLIST GRADING PLAN

* Requires special attention by checker.

[ ] TITLE BLOCK (same as cover, except no City Engineer or compliance signature blocks)

[ ] Contours of existing ground with elevations noted.

[ ] North arrow and scale.

[ ] Existing features within 25' of boundary.

[ ] Finish grades - by contours or spot elevations indicating proposed drainage patterns and grading. Show finished grade elevations at corners of all structures and lots; top of curb elevation for BCR, ECR, B.C., E.C., BVC, EVC and top and toe of all cut and fill slopes at lot corners.

[ ] Daylight lines - Show "C" and "F". (cut and fill).

[ ] Front yard set back line.

[ ] Lot numbers and dimensions (including curves) at property lines.

[ ] * Storm drainage system (shown in phantom).

[ ] * All existing utilities (sewer, water, gas, telephone, electrical, etc.).

[ ] All existing trees.

[ ] Right-of-way width.

[ ] Flow arrows with slope in percent (0.4% Minimum and 10.0% maximum).

Ⅱ-18

[ ] Street names.

[ ] Adjoining tract numbers.

[ ] Street centerline dimensions.

[ ] Matchline with sheet reference.

[ ] * Retaining and freestanding walls - (location and reference).

[ ] Slopes with label (slope ratio 2:1, 3:1, etc.)

[ ] Engineer has signed and sealed each sheet

Π-19

GRADING PLAN CHECKLIST DRAINAGE BASIN

*Requires special attention by checker.

PLAN VIEW

[ ] Boundary (lot lines).

[ ] Slopes with label. (Slope ratio)

[ ] Elevations at toe and crest.

[ ] Dimensions.

[ ] * Ramp (paved with cut-off wall at bottom) with reference to detail (max slope 15%, min width 15').

[ ] * Entry gate with reference to detail.

[ ] * Walls with reference to detail.

[ ] Scale (min 1" = 20').

[ ] Cross-section shown to center line of adjoining streets (min. of 1 each way).

[ ] * Rip-rap or other energy dissipater.

[ ] Adjoining lots and numbers.

[ ] Title Blocks.

[ ] * Finished surface elevations, water surface elev. Q25.

[ ] * Structures, pipes, headwalls, rip-rap, spillways, etc. shown with reference to street plans.

II - 20

INDEX: ACCEPTANCE OF DRAINAGE - CUT/FILL SLOPES (whichever is applicable)

(Owner)

Leave 2x3 blank space for recorders use

(Owner)

City of Palmdale Building and Engineering Services 38250 Sierra Highway Palmdale, California 93550

Attention: City Engineer

Gentlemen:

We, I, Owners Name/s)____ are the owner/s of the following described property:

As owner/s, we have examined all plans for the development of

(Give Legal Description of the Site to be Developed)

Known as (Give proposed Address - If available)

give permission to (Drain Water, Construct Cut/Fill Slopes whichever is applicable)

The undersigned states that the City of Palmdale will be free and clear of any and all liability for damages due to this work.

The cost and maintenance of the (drains, slopes, etc.) shall be the responsibility of (Name/s of whoever is accepting responsibility).

Ⅱ-21

INDEX: ACCEPTANCE OF DRAINAGE-CUT/FILL SLOPES

(Owner)

(Owner)

City of Palmdale

City of Palmdale Building and Engineering Services 38250 Sierra Highway Palmdale, California 93550

Attention: City Engineer

Gentlemen:

We, I, _____ are the owner/s of the following described property:

As owner/s, we have examined all plans for the development of

known as _____

give permission to _____

The undersigned states that the City of Palmdale will be free and clear of any and all liability for damages due to this work.

Ⅱ-23

SECTION III

GEOTECHNICAL REPORTS

A. FEASIBILITY EVALUATION

All properties shall be evaluated for feasibility. For that evaluation a site plan showing the location and dimensions of the property is necessary. The site plan should be of sufficient detail to outline existing topography and proposed grading. It is not necessary to provide information on existing topography in flatland areas (less than 4 percent surface relief). Excavations for slopes, basements, etc. should be identified on the Feasibility map.

A detailed Feasibility evaluation should be performed for properties with flaws that would affect the design process; i.e., necessitate design around a defect. Adverse conditions could be active faults, nuisance water disposal and large preexisting landslides. Since these conditions entail different geotechnical investigation techniques they are considered as separate issues in the following text. A project may have more than one adverse condition and the analysis would be a combination of the following:

• Active Fault Potential: Prior to the design phase, a fault study must be prepared on properties within an Alquist-Priolo Special Studies Zone and those outside that zone which may be affected by the trace of an active fault. The fault study should be along the following outline:
• A photo lineament study should be performed. A map should be prepared that shows all possible lineaments. Scale of the map will be dependent upon size of the property and detail and expression of the lineaments.
• The consultant is encouraged to discuss the findings of the photo-lineament analysis with the reviewer.
• Any Alquist-Priolo Special Studies Zones limits shall be shown on a base map with a minimum I" = 2,000' scale.

III-1

4. A fault trenching program should be implemented to evaluate all suspect fault features.
5. Relative age dating of soils and geomorphic features by a qualified soil and geomorphic stratigrapher may be necessary on a case by case basis depending upon the site conditions.
6. Continuous faults that have insufficient soil cover to allow age assessment and are structurally associated with active fault regimes will be considered active. Correlation of these fault conditions between tracts may be performed on a case by case basis.
7. Active faults identified by the consultant shall be located by a registered land surveyor and shown on the geologic or fault map which utilizes the final grading plan.

Nuisance Water Disposal: During the feasibility phase, tracts in impermeable soil/bedrock areas or high groundwater locations will be evaluated for effectiveness of drywell disposal of nuisance water. The feasibility of the nuisance water drywells will be substantiated by on-site percolation tests. The nuisance water evaluation will be in general conformance with the guidelines covered in Section V, Nuisance Water Management.

Large Landslides: Evaluation of large landslides will be performed in the feasibility phase of tracts in hillside (slopes steeper than 5:1) areas. Where landslides are present or suspected, sufficient subsurface exploration will be required to determine the basic geometry and stability of the landslide mass and the required stabilization measures. Gross stability studies and pseudostatic analyses must indicate calculated safety factors of at least 1.5 and 1.1 respectively.

B. DESIGN PHASE

After a project is considered feasible it should go to the geotechnical design phase. This phase requires a thorough geotechnical study for review. The design geotechnical study is based on the grading or construction plan to be used for earthwork or construction. A geotechnical report should be prepared that considers pertinent soils engineering, geologic and hydrogeologic conditions. It would present recommendations including but not necessarily limited to site grading criteria,

III-2

collapsible soil distribution and treatment, foundation design, slope stability for cut and fill slopes 10 feet or higher, lateral earth pressure, and location and effects of nuisance water. In some cases these questions would have to be answered, at least in part, during a feasibility stage investigation. Following are general minimum guidelines for this phase of tract development.

Grading Plan

1. The tract grading plan shall be at a minimum scale of 1" = 40'. Smaller projects shall have a scale suitable to define grading and foundation parameters. All grading plans shall be on a 24" x 36" sheet of 3 mil mylar.
2. The first sheet of the grading plan shall be wet ink signed and dated by both the tract geotechnical consultants and the civil engineer.
3. Building setbacks from recognized active faults shall be clearly identified on the grading plan. Special foundation zones shall be shown on the grading plan or identified in the grading notes.
4. Cut/fill lines shall be shown on the grading plan.
5. The locations of proposed structures, surface and subsurface drainage facilities, paved surfaces, drywells, etc., shall be clearly shown on the grading plans.

C. GEOTECHNICAL REPORT

1. The geotechnical report shall consider all applicable and pertinent earth conditions at the site. The relationship of the site to the regional geologic framework shall also be discussed.
2. The geotechnical report shall, at a minimum, consider and present the following general requirements where applicable:
3. a.Geologic map and cross sections shall be prepared in all bedrock areas. The geologic base map should be the final grading plan. The cross sections should be oriented to best demonstrate site geologic structure. If desired an additional larger scale map may be used to illustrate site geology.

Ⅲ-3

• b.All subsurface exploration locations should be shown on a map that utilizes the final grading plan as a base. They may be shown on the geologic map.
• c.All subsurface explorations shall have a descriptive log. The log shall, at minimum, provide ground surface elevation, the depth of all samples, unified soils classification, depth to ground water (if encountered), all geologic measurements and description of all encountered materials.
• d.Sufficient geologic measurements taken from explorations, photo lineaments, outcrop or referenced studies should be shown on the geologic map to define the geologic structure of the project.
• e.The site earth materials and geologic structure shall be discussed.
• f.Regional geology shall be discussed.
• g.Rippability shall be considered.
• h.Large rock disposal and handling shall be discussed.
• i.Seismicity of the region and site should be evaluated.
• 3 The geotechnical report shall consider slope stability.
• a.This applies to deep-seated stability of natural, cut and fill slopes. Surface stability (i.e., infinite saturated slope within 3 feet of the face) of slopes should be calculated for all slopes greater than 10 feet high.
• b.All graded slopes should be at a ratio of 2:1 or flatter.
• c.All slopes should have a calculated safety factor of 1.50 or greater under static conditions. Pseudostatic analysis with at least 1.1 safety factor may be required.

Ⅲ-4

• d.The consultant should provide recommendations for control of erosion/surficial deterioration for graded slopes with low cohesion near surface soil or bedrock geologic structure.
• e.Any geologic structure (i.e., bedding, joints, fault surfaces etc.) should be Utilized in the stability analyses.
• f.Strengths utilized in the stability analyses should be derived from laboratory tests on the material that is considered for hypothetical failure.
• g.Representative geologic cross section(s) shall be developed for all slopes that have geologic structure and are analyzed for slope stability.
• h.Laboratory testing for shear strength should be performed on water saturated samples.
• The geotechnical report shall discuss and present soils engineering parameters. The minimum guideline requirements for soils engineering studies are as follows:
• a.Each site must have a soils engineering study.
• b.Soils engineering studies shall be based on adequate and sufficient laboratory testing which should consist of; but not necessarily be limited to, soil compressibility; shear strength; dry density and optimum moisture content; and expansion potential.
• c.The potential for soil collapse must be evaluated.
• d.Subsurface explorations for the soils engineering report should be shown on a plan with a scale sufficient to describe their location (not necessarily a $1" = 40' scale).
• e.Recommendations for soil removal, foundation design, retaining wall design, slope stability (deep and surficial), compaction requirements and any other pertinent soils condition should be presented.
• f.Liquefaction potential should be considered where applicable.

III - 5

5. The geotechnical report shall consider rising water potential as it affects the proposed development.
6. a.Rising water is any water that daylights as seepage, springs or flows at the earth surface. It can be the result of landscape watering, natural rainfall and runoff or rising ground water table. It generally occurs after grading when geologic structure in combination with artificial fill and landscape water produce daylighting of subsurface water.
7. b.All areas of fill over low permeability bedrock shall be evaluated for rising water potential.
8. c.Any geologic boundary (i.e. faults, formational contacts, etc.) shall be evaluated for rising water.
9. d.Subdrains shall be designed and specifications presented for control of rising water. They should be discussed and described in the geotechnical report and shown on the grading.
6. The geotechnical report shall include an analysis of nuisance water drywells. Minimum report guidelines are as follows:
7. a.Permeability of soils and bedrock should be determined by on-site percolation tests.
8. b.The percolation tests should take into account the interval where nuisance water will be discharged. Testing outside the injection zone is not applicable.
9. c.Barriers to ground water flow should be identified by subsurface exploration.
10. d.Depth to bedrock and ground water should be determined. This can be achieved by reference documents in deep alluvial or ground water areas.

Ⅲ-6

• e.The subsurface effects of nuisance water injection shall be determined by the consultant. This includes potential for soil hydroconsolidation and daylighting (rising) water on and off site.
• f.Mounding potential of discharged water should be determined.
• g.The appropriate City guidelines should be utilized for design, construction and testing of the drywell (refer to Section V for further guidelines).
• Site grading details and specifications shall be in the geotechnical report and on the grading plan. Typical items that would be discussed include, but is not limited to, the following:
• a.Buttress key dimensions shall be indicated in the report and shown on the grading plan.
• b.All subterranean drainage devices shall be shown on the grading plan.
• c.Cut slopes converted to fill may require subdrains.
• d.Filled major canyons require subdrains.
• e.Subdrain material specifications shall be in the report.
• f.Subdrain design (i.e., volume of filter material, pipe specifications, etc.) should be shown in the report.
• g.Fill placement specifications should be presented and field guidelines for approval of over-excavation bottoms given.
• h.The grading plan to be used for earthwork should be reviewed by the geotechnical consultant for conformance to their recommendations.
• The grading plans submitted to the City should be wet ink signed and sealed by the design geotechnical consultant(s).

Ⅲ-7

D. FINAL REVIEW

After the design review approval, the tract may commence with grading. A final review shall be performed after grading and submitted to the City. Requirements of this phase are in the following sections.

1. General in-grading review guidelines are:
2. a.The City Inspectors will provide regular in-grading inspections, as needed. If desired, the consultant of record or the City Inspectors may contact the City Engineering office for a site visit by the appropriate City professional or consultant.
3. b.In-progress grading (interim) may be prepared by the consultant for review. These reports would discuss the grading progress and any changes from the original design. Changes in design to be reviewed by the City.
4. Major design changes should be reviewed by the geotechnical consultant and recommendations submitted for approval with plan revisions to City Engineering.
2. After grading, a final geotechnical report shall be submitted for review. It shall, at a minimum, contain the following information:
3. a.A general description of the grading operations and encountered conditions. Deviations from the design report shall be identified and explained.
4. b.Where necessary, a geologic map shall be provided which shows the as-built geologic conditions. It shall include mapping of faults, geologic contacts and bedding attitude measurements.
5. c.Subdrain locations shall be shown on the as-graded map.
6. d.Buttressed slopes shall be shown on the grading plan. If conditions other than those anticipated by the design report were encountered during grading, stability calculations should be presented in the report.

Ⅲ-8

• e.Over-excavated lots shall be identified in the report.
• f.Final recommendations for expansive soils and soluble sulfates shall be in the report.
• g.Final foundation design recommendations shall be in the report, including seismic design criteria.
• h.Depth of soil over-excavation shall be in the report.
• i.Results of laboratory and field tests.
• j.Plan showing locations of soils test.
• k.Certification of lots by the Soils Engineer (GE/RCE)
• A separate letter shall be prepared that identifies the lots on which soils investigations will be required for future additions.

Ⅲ-9

SECTION IV STREET IMPROVEMENT PLANS

A. GENERAL

• The guidelines, criteria, and standards listed here should be considered the minimum design standards for street improvements. Exceptions may be considered if dictated by adverse topographic or environmental conditions. A request for each exception shall be submitted to the City Engineer for decision. The following are general requirements which apply to all plans for public improvements.
• Each sheet of the improvement plans submitted for plan check shall be stamped by a Registered Civil Engineer with expiration date. Prior to approval all original mylar plans shall be wet signed, sealed and dated.
• Plans submitted for checking shall be complete in all phases of design. Incomplete plans will be returned unchecked.
• Any named travel way shall be a street. If developers desire a street to have a name, it must be constructed to City standards.
• Private streets are discouraged and will only be allowed when approved in advance by the Planning Commission. Private streets shall be constructed to City standards.
• Developer's Engineer shall establish a minimum one permanent bench mark in each project, and provide to the City Engineer a complete description, elevation to three decimal places and level notes from a bench mark listed in the LACPD precise bench mark list, Palmdale Quad.

B. GEOMETRICS

For purposes of geometric and structural design, streets shall be classified according to the following. Any deviation from the following standard shall require the approval of the City Engineer.

IV-1

The parameters listed on Figure IV-1 shall be used for the design of streets within the City of Palmdale. (For Standard Street Sections see pages IV-27 through IV-34). The structural section given is based on an R-value of 5. A lesser structural section may be used only after the City Engineer has given written approval of the soils engineer's recommendations which must be based on R-Value soils tests taken after rough grading.

IV-2

FIGURE IV - 1

Note 1: The street structural section shall be determined from "R" values obtained from materials gathered at the level of the proposed subgrade using the State of California Division of Highways design method for crushed aggregate base. Crushed aggregate base shall conform to section 200-2.2 of the latest edition of the Standard Specifications for Public Works Construction (Green Book). In no case shall the minimum street section be less than 3 inches asphalt concrete and 4 inches of aggregate base. If deep lift asphalt is used the minimum section shall be 7 inches of asphalt.

*** See Standard Street Sections (pages IV-30 thru IV-33)

Up to 8% with special approval of the City Engineer

Up to 14% with special approval of the City Engineer

STREET DESIGN PARAMETERS

C. SUBMITTAL REQUIREMENTS

1. The initial submittal of Street Improvement plans for review shall include the following:
2. a.Street Improvement Plans - 3 folded copies
3. b.Grading plan - 1 copy
4. c.Sewer Plans - 2 copies - see checklist in Section VII
5. d.Water Plans - 1 copy
6. e.Cost estimate on City form - 1 copy
7. f.Cost summary on City form - 1 copy
8. g.Sewer Area study with design calculations - 1 copy
9. h.List of estimated bond amounts - 1 copy
10. i.Storm drain hydraulics calculations - 2 copies
11. j.Approved Conditions of Approval - 1 copy
12. k.Approved Tentative Tract map - 1 copy
1. Tract map - 1 copy
2. m.Plan Check Fees

IV - 4

2. Subsequent submittals shall include:
3. a.The previous marked up check prints
4. b.Revised plans - 2 copies
5. c.Previously checked Hydrology/Hydraulics calculations
6. d.Revised Hydrology/Hydraulics calculations - 2 copies
7. e.Any additional material necessary for the plan checker to complete his review.

3. Prior to approval of plan:

• a.Right of entry for any work to be performed on adjacent properties. Permission to be in letter form signed by adjacent property owner and notarized. A form is available at the City Engineer's Office. This is required even if the owner of the impacted property is the developer of the subject project.
• b.Drainage acceptance letter or easement from the owners of all impacted properties. This is required even if the owner of the impacted property is the developer of the subject project.

D. PLAN PREPARATION

Plan and Profile Sheets shall be prepared in accordance with the Los Angeles County Road Department Design Manual and the following:

1. All sheets must be inked linen or mylar (3 MIL), 24" x 36" overall size, with a 1" margin on all sides except the left margin which shall be 1.5".
2. Stationing shall increase northerly and easterly.

IV - 5

3. Stationing shall read from left to right. Negative stationing is not acceptable. Stationing has preference over North arrow.
4. Right end of one sheet joins the left end of the next.
5. All streets shall have continuous stationing. Where possible, continue stationing from previously approved plans.
6. The first sheet shall be a Title Sheet and include:
7. a.Location map showing the following:
1. Project location.
2. Major cross streets.
3. City Limit lines if near project.
4. North arrow and scale.
5. b.Index map showing the following:
1. Street configuration within project.
2. Lot configurations and lot numbers, if project is a subdivision.
3. Project and Phase boundaries.
4. Street names.
5. Index of sheets.
6. City limit lines, if near project.
7. North arrow.

IV - 6

8. Scale 1" = 200' and include bar scale.
9. Storm drain improvements (existing and those to be constructed).
10. Arrows indicating direction of surface flow in streets.
11. Detention/retention or retarding basin location.
12. Drywell locations.
13. c.Benchmark - number, quad, description, date (year of adjustment), and elevation to three decimal places.
14. d.Engineering firm name, address, telephone number, date of plan preparation, signature, stamp, R.C.E. number and date of expiration.
15. e.Title block containing tract number and which phase of tentative tract number, if applicable; City-assigned "ST" number.
16. f.Developer's name, address and telephone number.
17. g.Signature block for Plan Check Engineer and a Recommended By block.
18. h.Approval block for City Engineer's signature and date, and for other agencies when necessary.
19. i.Revision block with revision number, date, initials of design engineer, description of plan change, index of sheets affected by the revision, and spaces for City approval and date.
20. j.Applicable general notes.
21. k.Typical sections showing:
1. Each geometric street variation with limits, if applicable. (See STD No. M-8.3)

IV - 7

2. Existing pavement to be overlayed, joined or removed. (See STD No. M-8.3)
3. Paving, curb and gutter to be constructed, and details of join to existing pavement.
4. Where full improvements are not to be constructed, show interim section with required grading, slopes, and right-of-way.
5. All necessary geometric dimensions including, but not limited to:
6. a)Sidewalk width and location.
7. b)Centerline to curb face, including pavement crossfall.
8. c)Centerline to right-of-way.
9. d)Level line relationship between centerline (crown) and top of curb with vertical dimension.
6. Structural section (use Structural Section shown in chart until sections recommended by the soils Engineer are approved by the City Engineer).
1. A complete list of construction notes.
7. Profile shall include:
8. a.All rates of grade. Negative grades shall be indicated.
9. b.Elevations of curb return quarter points.
10. c.All utility line crossings and sub-structures which could interfere with road or other underground construction.

IV - 8

8. Plan view shall include:
9. a.North arrow, scale and 3" bar scale.
10. b.Existing improvements to be shown with dashed line.
11. c.Improvements to be constructed, including all joins at project boundaries; the interim conditions shall be clearly shown.
12. d.Approved Street names.
13. e.Centerline stationing of both streets at all intersections. The station and name of the subject street shall be shown above the leader and the station and name of the intersecting street below.
14. f.Stationing along the centerline of construction should match stationing established by earlier plans.
15. g.Stationing shall be marked on all construction centerlines and aligned with profile.
16. h.All existing utilities - show proposed water and sewer (solid).
17. i.Tract number, tract boundary, lot lines and lot numbers for each parcel adjoining the street right of way.
18. j.Match lines clearly shown and referenced.
19. k.Curve data for all horizontal curves. BC's, EC's, BCR's and ECR's shall be labeled and stationed, (convention for BCR's and ECR's - proceed clockwise around the return from BCR to ECR).
1. Identification of all storm drains.
2. m.Drywell locations.

IV - 9

9. Construction details not included in the standard drawings of an approved agency.
10. Construction notes shall be positive statements to perform certain specific items of work shown on the plan. General comments not specifically tied to a symbol on the plan shall be placed in the General Notes. A list of standardized construction notes are shown on page IV-15. Use only the notes that apply to the specific street plans. Additional construction notes that are site specific must be developed by the design engineer as necessary.
11. Because of ambiguity in the way it is used, the word "proposed" shall not be used on construction plans. Items may be classified as existing, under construction, by others., or future.

IV - 10

STREET PLAN GENERAL NOTES

1. Work shall be performed according to the latest edition of the Standard Specifications For Public Works Construction, the excavation and building code of the City of Palmdale, the City of Palmdale Engineering Design Standards and any special requirements of the permit. Other references are to the latest editions of APWA Standard Plans For Public Works Construction, Los Angeles County Department of Public Works Standard Plans and Caltrans Standard Plans.
2. Before work can be started, the contractor must obtain an encroachment permit to work within the existing public right-of-way from the City Engineering Division, 38250 Sierra Highway, Palmdale CA 93550.
3. Application for inspection by The City of Palmdale shall be made by the contractor at least twenty-four (24) hours before the services thereof will be required; phone (661) 267-5255.
4. Work in public streets, once begun, shall be prosecuted to completion without delay so as to provide minimum inconvenience to adjacent property owners and to the traveling public. Failure to comply with this requirement is a violation of the Highway Permit Ordinance.
5. The contractor shall take all necessary and proper precautions to protect adjacent properties from any and all damage that may occur from storm water runoff and/or deposition of debris resulting from any and all work in connection with subdivision construction.
6. Construct sidewalk returns per Standard Plan C-7 series as applicable.
7. Paving to be done in 2 layers - bottom layer shall be 3/4" rock (Type B mix AR-4000) and the final layer shall be 1" thick with 1/2" rock (Type C-2 Mix AR-4000). All work is to be completed to the satisfaction of the City inspector in the field and also to the satisfaction of the City Engineer.
8. Street structural sections will be determined by R-Value soil testing. Subdivider's soils engineer shall provide R-Value tests after streets have been rough graded. Test results shall be subject to review and approval by the City Geologist. Plan must be as-built to show actual structural section constructed. The crushed aggregate base shall consist entirely of crushed rock and rock dust.
9. There shall be no above ground obstructions in any portion of the sidewalk except where the width, exclusive of top of curb, is 6' or greater. Otherwise provide a taper to maintain a 48" minimum unobstructed width (reference Standard Plan C-6).

IV - 11

10. Where sidewalks are adjacent to curb, construct residential driveways per Palmdale Standard Drawing No. C-1. Use Standard Drawing No. C-3.1 for alternate residential driveway sections. Construct Industrial and Commercial driveways per APWA Standard Plan 110-1, Type C and Standard Plan 111-2. Type 2.
11. Construct street name signs per Palmdale Standard Plan M-5. Placement locations shall be as directed by the City Traffic Engineer. Street name signs shall be posted prior to occupancy of buildings.
12. Provide a street lighting system plan for the City Engineer's review and approval.
13. Processed miscellaneous base may be used under curb and gutter in lieu of crushed aggregate base.
14. In lieu of crushed aggregate base under walks, contractor may use processed miscellaneous base or select material with expansion of 3% or less as determined by Soil Engineer's expansion test.
15. Prior to sidewalk construction contact City of Palmdale Landscape Architect for requirements on tree well locations and irrigation system construction.
16. Curb and sidewalk joints shall be per A.P.W.A. Standard Plan 112-1. Sidewalk landings and returns shall be per City of Palmdale Standard No. C-7 series as applicable.
17. The purchase and installation of street name signs shall be the responsibility of the developer. The developer shall secure the approval of the City Traffic Engineer for the type and location of the street name signs prior to installation. (Reference Standard Plans M-5.1, M-5.2, M-5.3).
18. Stencil street names on at least two returns at each intersection in 4" block letters with black paint on white background.
19. The Private Engineer signing these plans is responsible for assuring the accuracy and acceptability of the work hereon. In the event of discrepancies arising during construction, the Private Engineer shall be responsible for determining an acceptable solution and revising the plans for approval by the City.
20. ** (include note 20 if drywell(s) are required).

IV - 12

20. All drywells shown on this project shall be maintained by the owners where their locations are on private property or through the creation of a Landscape Benefit Assessment District when approved by the City. Drywells will be replaced by the owners when they cease to drain standing surface water in a 24 hour period or are deemed to be obsolete by the City. Regular Maintenance of the drywell settling chamber is required to achieve proper operation of the drywell and shall be performed annually or more often depending upon its location, and shall be performed by the owner or district as applicable. All drywells shall be constructed per City of Palmdale Standards.
21. All material shall be inspected and accepted by the City Inspector prior to being used for construction. The City Inspector has the authority to reject the use of materials which are damaged or not in compliance with plans or standards.
22. The Contractor is hereby noticed that this street work will not be accepted for maintenance until the street improvements shown herein have been completed, all manholes, handholes and valve boxes brought to grade, utilities underground as required, street lights installed and operational, striping and signing completed as required, all Geotechnical testing completed and approved, as-built plans completed and approved, and existing improvements damaged during construction are repaired, all to the satisfaction of the City Engineer.
23. The Contractor shall provide for contributory drainage at all times and take all necessary and proper precautions to protect adjacent properties and improvements from any and all damage that may occur from storm water runoff and/or deposition of debris resulting from any and all work, to the satisfaction of the City Engineer.
24. The Private Engineer shall be required to provide as-built plans to the City Engineer prior to the acceptance of the work.
25. IMPORTANT NOTICE - Section 4216/4217 of the Government Code requires a Dig Alert Identification number be issued before any “Permit to excavate” will be valid. For your Dig Alert I.D. number, call Underground Service Alert toll free @ 1-800-422-4133, two working days before you dig.
26. If Work is to be done within a State Right-of-Way, a permit must be obtained from the State of California, Division of Highways, 120 South Spring Street, Los Angeles, CA.

IV - 13

PRIVATE ENGINEER'S NOTICE TO CONTRACTOR

The existence and location of any underground utility pipes, conduits or structures shown on these plans was obtained by a search of the available records. To the best of our knowledge, there are no existing utilities except as shown on these plans. The contractor is required to take due precautionary measures to protect the utility lines shown on these drawings. The contractor further assumes all liability and responsibility for the utility pipes, conduits or structures shown or not shown on these drawings. The contractor shall pothole all existing utilities to verify the location and any discrepancy between the plans shall be brought to the attention of the Design Engineer.

Contractor agrees that he shall assume sole and complete responsibility for the job site condition during the course of construction of this project, including safety of all persons and property and that this requirement shall apply continuously and not be limited to normal working hours. The contractor also agrees to defend, indemnify and hold the owner and the engineer harmless from any and all liability, real or alleged in connection with the performance of work on this project, excepting for liability arising from the sole negligence of the owner or the engineer.

ENGINEER'S SIGNATURE (Print Name) under signature line R.C.E.

R.C.E. DATE

IV - 14

STREET IMPROVEMENT CONSTRUCTION NOTES

1. Construct 3" minimum thick A.C. pavement on 4" minimum thick crushed aggregate base. (See General Notes 7 & 8).
2. Construct minimum 4" thick A.C. pavement on 6" minimum crushed aggregate base (See Gen. Notes 7 & 8).
3. Construct 8" curb and gutter per A.P.W.A. Std. Plan 120 - 1, A2 - 200(8) (See Gen. Note 13).
4. Construct 6" curb and Gutter per A.P.W.A. Std Plan 120-1, A2-150(6)(See Gen. Note 13).
5. Construct 4" P.C.C. sidewalk. (See Gen. Notes 14, 15 & 16).
6. Construct concrete crossgutter per A.P.W.A. Standard Plan 122-1.
7. Construct modified concrete wheelchair ramp per City of Palmdale Standard No. C-7, Case ___.(See Gen. Note 14).
8. Sawcut and remove 1' minimum existing AC pavement to provide for a neat joint.
9. Cold plane 1" to meet centerline and overlay.
10. Existing utility equipment (power poles, water meters, fire hydrants, etc.) will be relocated per City Standards and utility company requirements.
11. Construct 2" x 6" redwood header, or construct an additional 1' of AC pavement at edge of AC paving.
12. Install ___, Type I guide markers per L.A.C.R.D. Standard Plan 84-01. ** Additional project specific Construction Notes to be developed by the design engineer as necessary.

IV - 15

E. DESIGN

Street improvements shall be designed in accordance with the policies and criteria set forth in the Los Angeles County Road Department Design Manual incorporated by reference in these Design Standards and the following:

1. The street structural section shall be determined from "R" values obtained from material gathered from the level of the proposed subgrade using the State of California Division of Highways design method. In no case shall the minimum street section be less than 3 inches asphalt concrete and 4 inches of aggregate base. The aggregate base section may be comprised of an equivalent section of aggregate base and aggregate subbase, but in no case shall the aggregate base be less than 4 inches. If deep lift asphalt is used the minimum section shall be 7 inches of A.C. (see Figure IV-1, page IV - 3).
2. Arc length on centerline of horizontal curve shall not be less than 100 feet unless the centerline radius is greater than 3,000 feet. At an intersection, only that portion of the curve outside curb returns can be used to satisfy this requirement.
3. In hillside terrain, or if other design constraints are present, curve radii may be reduced (with corresponding super elevation) in conformance with the L.A. County Highway Design Manual, and shall be subject to the approval of the City Engineer.
3. If a highway changes classification and width at an intersection the typical section of the higher classification shall be carried through the intersection and then transition back to the lower classification. This transition is normally 600 feet and is subject to the approval of the City Traffic Engineer prior to approval of the improvement plans.
4. Corner cut-offs are required at all highway intersections, including intersections with local streets. Local-to-local street intersections also require corner cutoffs. (see City of Palmdale Std. No. C-7 series)
5. Adjacent intersections along the highway, but on opposite sides and offset in a direction in which left turns will not be in conflict, should be spaced a minimum of 150 feet centerline to centerline.

IV - 16

6. When new asphalt is joined to an existing street, one inch depth of asphalt shall be removed from the edge of pavement to the centerline of the street and shall be overlayed with one inch of asphalt to the satisfaction of the City Engineer. The means of removal shall be cold planing or any other means of removal approved by the City Engineer.
7. Major highways may require raised medians. (This to be determined by the City Traffic Engineer). All access points are subject to approval by the City Traffic Engineer.
8. Local and Collector streets:
9. a.Definition:
1. Local Street - (58' & 60' R/W) A street with direct residential frontage with Average Daily Traffic (ADT) volumes not exceeding 1200 vehicles per day.
2. Collector - (64' R/W) A non-arterial street normally through a residential area, designed to collect traffic from local streets and distribute it onto arterial highways. Residential collectors are designed to carry traffic volumes generally greater than 1200 vehicles per day but less than 4000 vehicles per day. No direct residential access is permitted.
3. b.General Design Criteria for Local Streets and Collectors:
1. Collector streets - Minimum centerline radius is 300 feet.
2. Local streets - Minimum centerline radius is 250 feet.

IV - 17

• c.Curb returns shall be designed by the "plane method"; see City of Palmdale Standard Plan No. G-4.
• d.Standard cul-de-sacs are required for all permanent dead-end streets and may be required for temporary dead-end streets if future development seems remote. The following are recommended maximum lengths of cul-de-sacs.
• 500 feet in length when serving land zoned for industrial or commercial.
• 700 feet in length when serving land zoned for residential uses having a density of more than four dwelling units per net acre.
• 1000 feet in length when serving land zoned for residential uses having a density of four or less dwelling units per acre.
• Vertical Curves:
• The minimum length of vertical curves will be governed by the Algebraic Grade Differential as noted in the table below:

In addition to the previous table, the minimum length of vertical curves shall comply with current Los Angeles County Public Works Department Standards (refer to 1972 Los Angeles County Road Department Design Manual). The minimum length of crest vertical curves shall be governed by passing sight distance, if appropriate (Plate 2.5 - 01), or by stopping sight distance (Place 2.5 - 02). The minimum length of sag vertical curves shall be governed by Headlight Sight Distance (Plate 2.5 - 03).

IV - 18

STREET IMPROVEMENT PLAN CHECKLIST TITLE SHEET *Requires special attention by checker.

[ ] 24" x 36" SHEET

[ ] BENCHMARK - County of Los Angeles, Palmdale Quad, elevation, location, benchmark number, description, adjustment date.

[ ] TITLE BLOCK - Tract number & Palmdale number (bottom right and right margin), sheet number, phase, City Engineer approved by, recommended by and plan check by signature blocks, revision blocks.

[ ] KEY MAP - Scale, bar scale, north arrow up, flow arrows, street names, street widths, drywell locations, lot lines and numbers, retention/detention basin location, key to sheet numbers, adjoining tracts, City Limits. Show entire tentative tract boundary.

[ ] VICINITY MAP - Major street names, city and county boundary, north arrow UP.

[ ] Engineer's seal, expiration date, signature, date signed. Company name, address, phone number.

[ ] TYPICAL SECTIONS - for each geometric section show right of way width, right of way half-widths, C.L. to T.C., T.C. to right of way, maximum cut and fill slope at right of way, level line with crown dimension; existing and proposed improvements with dimensions; sidewalk width and 1/4" slope per foot, parkway width, appropriate construction notes, street name, limits, interim conditions.

CONSTRUCTION NOTES (numbered and circled) - i.e. Pavement sections, sidewalk, wheelchair ramp, curb and gutter, sawcutting existing pavement, thickened pavement edge, cross gutters, driveways, misc. Construction note numbers must be consistent throughout set of plans.

[ ] General Notes (Reference pages IV-11, IV-12 and IV-13).

[ ] Private Engineer's Notice to Contractor (Reference page IV-14).

[ ] Private Engineer's Statement of Responsibility.

IV - 19

STREET IMPROVEMENT PLAN CHECKLIST PLAN AND PROFILE SHEET *Requires special attention by checker.

[ ] TITLE BLOCKS - Revision Blocks

[ ] Stamp/seal with exp. Date and signature of Engineer

[ ] Signature blocks for Checked By and Recommended By.

[ ] Tract and phase number.

[ ] Palmdale number.

[ ] Pages numbered consecutively.

[ ] Stationing along C.L.- does it match existing stationing and show a reference station at an intersecting street.

PLAN VIEW 1"=40'

[ ] North arrow (to top or left), scale 1" = 40', 3" bar scale.

[ ] * Existing improvements and utilities shown dashed.

[ ] * Limits of construction (joins and interim conditions), new asphalt shaded.

[ ] Street names. Street widths with construction dimensions.

[ ] Center line stationing of both streets at intersection on leader (subject street above, intersecting street below). *Offsets. Minimum center line curve length per Conditions of Approval.

[ ] Tract boundary, tract number, lot lines and numbers, adjacent parcel numbers, detention/retention basin.

IV - 20

[ ] * Applicable construction notes only.

[ ] Match lines with sheet reference.

[ ] * Flowline elevations and curve data for all horizontal curves. BC's, EC's, BCR'S, and ECR's shall be labeled and stationed, with elevation (convention for BCR's and ECR's - proceed clockwise from BCR to ECR). Include flowline elevation at P.I.'s in cross gutter.

[ ] Storm drain facilities.

[ ] Wheelchair ramps.

[ ] * Depressed inlet detail with reference, stationing, and elevations.

[] * Stationing for any other miscellaneous structures, i.e. driveways, fire hydrants, poles, barricades and references.

[ ] * Horizontal curve table with delta, R, L, & T consecutively labeled. (The difference in the delta of any two adjacent curb returns may not exceed 10circ). Horizontal curve data shall be identified by letters in a hexagon and shall be consistent throughout the set of plans.

PROFILE

[ ] Stationing and elevation of grid.

[ ] Profile fine labeled for each side and center line.

[ ] T.C. grade each side. Finished surface at centerline.

[ ] Existing ground at right of way and center line.

[ ] No grade breaks of more than 0.50%.

[ ] Open circle at grade breaks (-0-).

IV - 21

[ ] * Station and elevation at grade breaks, intersections, B.C.'s, E.C.'s, tract boundary, match line.

[ ] Scale (1" = 40' horizontal and 1" = 4' vertical).

[ ] * Vertical curve data - tangent grade, length of curve, P.V.I. station and elevation, stations and elevations at 25' maximum interval, 100' minimum length where possible.

[ ] * Elevation at curb return quarter points, curb face height at quarter points of transition, curb face transition labeled.

[ ] Height of curb face noted for each side.

[ ] * Storm drain facilities.

[ ] * Utility line and sub-structure crossings.

[ ] Profile of existing ground extended 300' beyond end of improvements.

[ ] Identical points flagged as such.

・

IV - 22

STREET IMPROVEMENT PLAN CHECKLIST DRAINAGE STRUCTURES

[ ] TITLE BLOCKS

*Requires special attention by checker.

[ ] DRAINAGE STRUCTURE DETAILS

[ ] Check Drainage Master Plan for required drain lines.

PLAN VIEW

[ ] Station correlation with street plan. Stationing along pipelines (increasing in upstream direction) with invert elevations at intersections and types of material.

[] * All structures identified and referenced to standard and/or details. Variable dimensions noted, debris racks, protection barriers, headwalls, wingwalls, aprons, cut-off walls, etc.

[ ] * Rip-rap.

[ ] Streets with existing and new utilities, dimensions, names.

[ ] Nuisance water system shown.

[ ] Detail of each local depression.

PROFILE VIEW

[ ] Stationing and elevation of grid, stationing of plan and profile are lined up.

[ ] Structures with reference to standard or detail, invert elevations, lengths and type of pipe, class or strength.

[ ] Existing and finished surface over storm drains.

IV - 23

GUIDELINES FOR CURB, GUTTER AND SIDEWALK

These guidelines set forth the minimum acceptable requirements for curb, gutter and sidewalk in the City of Palmdale. Listed below are the conditions under which these requirements apply.

Following is a graphic presentation of street sections, showing required curb, gutter and sidewalk improvements in their proper dimensions.

As a matter of clarification, the width of sidewalks adjacent to curb are measured from the back of curb to the outside edge of sidewalk (i.e., a 5' wide sidewalk adjacent to curb includes only the sidewalk width and not the width of the curb):

1. SINGLE FAMILY RESIDENTIAL STREETS

a. In urban areas where the minimum size of single family residential lots is less than or equal to one acre, standard (6" or 8" standup face) curb and gutter, 5' wide concrete sidewalks and concrete drive approaches shall be required on both sides of streets of the following classifications:

• Residential collector (64' right-of-way).
• Local residential (60' right-of-way).
• Residential cul-de-sac (58' right-of-way)

Service roads (roads having access on one side) shall require curb and gutter on both sides of the street and 5' wide sidewalk on the fronting side of the street.

b. In urban areas where the minimum size of single family residential lots is greater than one acre, curb, gutter and sidewalk requirements shall be determined by the City Engineer for approval on a case by case basis.

IV - 25

• c.In areas having City approved Memorandums of Understanding (MOUs) where there is a conflict between the provisions stated in Paragraphs a and b above and those MOUs, the MOUs will take precedence. Areas known to have active MOUs include, but are not limited to the following associations:
• Sunnyside Farms
• Shadow Acres
• White Fence Farms II
• White Fence Farms III
• El Dorado
• Westside Park
• Royal Lanes
• d.In areas having specific plans where there is conflict between these provisions and the provisions in those specific plans, the provisions of the specific plan will take precedence except where the conflict would adversely affect public safety and welfare.
• e.For property adjacent to any major or secondary highway or master plan highway, construction of standard (6" or 8" stand-up face) curb and gutter and full width (back of curb to property line) sidewalk shall be required. An exception may be granted for highways adjacent to rural single family residential subdivisions where the minimum lot size is greater than one acre. In that case, standard (6" or 8" stand-up face) curb and gutter shall be required at a minimum. In areas designated as rural or mountainous, where there are exceptions to these requirements, specific requirements shall be cited on a case by case basis.

2. COMMERCIAL, INDUSTRIAL & MULTIPLE FAMILY RESIDENTIAL:

Standard (6" or 8" stand-up face) curb and gutter, concrete sidewalk and concrete drive approaches shall be required. The width and placement of sidewalk shall be in accordance with the guidelines shown graphically below or as amended:

IV - 26

STANDARD STREET SECTIONS

1. Residential entrance street from Main and Secondary or other master plan highways, through Collector Streets, streets adjacent to schools and multiple family residential streets:

2. Local Interior Streets:

IV-27

8. Regional Arterial, Section A1: 8 - Lane Arterial With Median *

Regional Arterial, Section A2: 8 - Lane Arterial With Median * With Bike Lanes - Designs by Special Study

* Medians may be painted or raised.

IV-32

SECTION V

DRAINAGE MANAGEMENT PLAN

INTRODUCTION

The City of Palmdale is currently planning significant improvements to the existing drainage system. Presently most storm runoff traverses the city as surface flows and are subject to concentration and increased short duration peaking in areas where development is occurring. Nuisance waters travel exceptionally long distances as gutter flows, and attain unacceptable depth and width of flow on flat reaches of streets.

It is the policy of the City of Palmdale that each development greater than five (5) acres (gross) in size be responsible for on-site mitigation of the short duration peak flows caused by the development. In addition, nuisance flows generated on-site shall be mitigated in every development.

Peak flow mitigation shall be accomplished by utilizing landscaped detention, retarding or retention basin(s). Other methods of peak runoff attenuation will be considered on a case by case basis. Until the drainage system allowing the disposal of nuisance flow is in place, the preferred method of nuisance flow mitigation is by subsurface injection utilizing dry wells.

Nonstructural flood protection measures (flood plain management) will be used within the Little Rock Creek and Big Rock Creek Watersheds as well as at upstream portions of all watersheds including Portal Ridge, Amargosa, Anaverde, Pearland, Little Rock and Big Rock drainage areas.

For the flood plain management areas, development within the floodway determined based on the capital flood will not be allowed. Development outside the floodway will be allowed at the current general plan land use designations. Refer to pages V-24 and V-25 for the definition of "Floodway".

After a review of drainage ordinances, hydrologic and hydraulic design manuals, and related material and flood control methodologies for adjacent and nearby drainage authorities, and input from the engineering community, this drainage management plan has been developed for the City of Palmdale as a guide for planning and design of master and local drainage facilities. The major sections in this Drainage Management Plan are: A) Hydrologic Protection Levels, B) Hydrologic Design Standards and Procedures, C) Hydraulic Standards and Procedures, D) Peak Flow Reduction Facilities, E) Percolation test procedure for retention basin design, and F) Nuisance Water Management.

A. HYDROLOGIC PROTECTION LEVELS

1. Capital Flood Protection (based on runoff resulting from a rainfall with a probability of occurrence of once in 50 years). The following shall be designed for the Capital Flood:
2. a.All regional facilities as described in the City of Palmdale Drainage Master Plan or as modified by the City Engineer.
3. b.Natural Watercourses
4. c.Open channels, closed conduits, bridges, dams, detention basins and debris basins which are constructed in or intercept flow from natural watercourses.
5. d.Floodways.
6. e.Natural depressions or sumps. Secondary overflow will be provided for all sump areas.
7. f.Culverts under arterial highways, except interim low flow culverts constructed for the purpose of eliminating cross gutters.
8. g.The lowest finish floor elevation of all habitable structures shall be a minimum of one-foot above the maximum water level resulting from a Capital Flood.

2. 25-Year and 10-Year Storm

All master plan and local drainage facilities will generally be designed so that:

• a.The peak runoff from a 25-year storm will be contained within the street right-of-way (see Figure V-1).
• b.The peak runoff from a 10-year storm will be contained at or below the street curbs (see Figure V-2).

V-2

C. For undivided major and secondary highways, one twelve (12) foot lane in the center will be clear of water for a 10-year storm peak runoff. For divided highways, one ten (10) foot lane in each direction will be clear of water for the peak runoff from a 10-year storm at ultimate development conditions (see Figure V-3). Subdivisions adjacent to highways with pre-existing flooding will be considered on a case-by-case basis.

If a storm drain is required to meet any of the three conditions listed above, it shall be designed for a minimum capacity of the peak flow from a 10-year storm. If a master planned storm drainage facility is proposed through the project which would mitigate the flooding, the developer may be required to construct the facility.

B. HYDROLOGIC DESIGN STANDARDS AND PROCEDURES

The design of all master and local facilities will be in accordance with the following standards and procedures:

1. Hydrologic calculations will be performed in accordance with the Los Angeles County Department of Public Works Hydrology Manual except the initial time of concentration will be determined from Figure V-4 and used in the subsequent calculations. Figure V-4 may be used, subject to the limitations of length and area.
2. Design frequencies will be as described under "Hydrologic Protection Levels".
3. Where applicable, the design shall include provisions for future extension of the drainage system to serve the entire drainage basin.
4. Required submittals - Improvement Plan Stage
5. a.Hydrology map on a scale of 1:500 or larger (e.g. 1:200) showing the entire drainage area tributary to a master plan drainage facility or a regional drainage facility. It will show the entire tributary area with contours/elevations, drainage area sizes, catch basins, connector pipes, mainline pipes, and the pertinent discharge data. Appropriate soil classifications and land use information will also be submitted.

V-3

Hydrology calculations shall show points of concentration, area (sub-areas and cumulative area), soil type, time of concentration, rainfall zone/intensity. percent impervious, subarea runoff, total runoff, conveyance facility size, length, slope, flowline used in the calculations and other characteristics.

Additionally, detention, retarding and retention basin design calculations shall be submitted.

• b.Plan of the proposed road system with grades and typical street cross-sections.
• c.Hydrology calculations. Hydrology calculations will be stamped and signed by a registered civil engineer.
• d.Two copies of the above will be submitted in the form of a report.

5. Required submittals - Tentative Map Stage

A preliminary drainage study shall be submitted to the City at the time of Tentative Map submittal. The submittal shall be in the form of a report, including drainage maps.

At this stage, runoff rates may be estimated using Figures V-5, V-6, and V-7. Retarding and detention basin volumes may be assumed as one acre foot for each 10 acres of single family residential land use and 1 acre-foot for each 5 acres of multi-family residential, commercial and industrial land uses. Retention basin volumes will be determined using Figure V-9.

It must be understood that the requirements for this stage may result in facilities sized smaller than those based on detailed hydrologic studies described in Sections V.B.1 through V.B.4. Approval of a Tentative Map based on the requirements of Section V.B.5 will in no way represent approval of the final drainage design. The final drainage facilities will be designed per the requirements of V.B.1 through V.B.4.

V-4

C. HYDRAULIC STANDARDS AND PROCEDURES

1. General Hydraulic Criteria

• a.Hydraulic calculations will be in accordance with “Los Angeles County Flood Control District Design Manual, Hydraulic”, latest edition.
• b.Closed conduits may be designed as flowing full and may be allowed to flow under pressure if the hydraulic grade line is sufficiently below the street surface to intercept catch basin flows with a minimum of 0.5 ft. freeboard in the catch basin below the gutter invert. (For catch basins outletting to detention or retention basins, this requirement may be waived by the City Engineer.) See Figure V-8.
• c.In any street or highway, the depth of water at curb times the velocity shall not exceed six. When this condition cannot be met, catch basins will be required to intercept the flow.
• d.Where debris may be expected, the design flows will be increased by an appropriate bulking factor.
• e.All closed conduit designed to flow under pressure, including connector conduit from catch basins to main line storm drains, shall be constructed with watertight gasket-type joints per section 306 of the Standard Specifications for Public Works Construction published by the American Public Works Association.

2. Design Requirements for Manholes

• a.Spacing - Manholes shall be located at beginning or ending of curves, pipe size changes, angle points, junctions and as required for maintenance.
• Conduit diameter 30 inches or smaller, manholes shall be spaced at intervals of approximately 300 feet. Where the proposed pipe is less than 30 inches in diameter and the horizontal alignment has numerous bends or angle points, the manhole spacing shall be reduced to approximately 200 feet.
• Pipe diameter larger than 30" but smaller than 45", manholes shall be spaced at intervals of approximately 400 feet.

V-5

3. Conduit diameter 45" or larger, manholes shall be spaced at intervals of approximately 500 feet.
4. The spacing requirements shown above apply regardless of design velocities. Deviations from the above criteria shall be subject to City of Palmdale approval.
5. b.Location - manholes shall not be located in street intersections where possible, especially when one or more streets are heavily traveled.
6. In situations where the proposed pipe is to be aligned both in easement and in street right-of-way, manholes shall be located in street right-of-way, wherever possible.
7. Manholes shall be located as close to changes in grade as feasible when the following conditions exist:
1. The upstream pipe has a steeper slope than the downstream conduit and the change in grade is greater than 10 percent of the upstream slope. Sediment tends to deposit at the point where the change in grade occurs.
2. Transitioning to a smaller downstream pipe due to an abruptly steeper slope downstream. Smaller downstream pipe shall not be allowed except extreme downstream conditions require the use of a smaller downstream pipe. The use of smaller downstream pipe will be subject to written approval of the City Engineer. In cases where storm drains pass through and are discontinuous through detention basins this rule does not apply.
3. c.Design - When the design flow in a pipe flowing full has a velocity of 20 fps or greater, or is supercritical in a partially full pipe, the total horizontal angle of divergence or convergence between the walls of the manhole and its center line shall not exceed 5circ 45'.
4. d.Pressure Manholes - Pressure manholes shall not be allowed. Exceptions may be made on a case-by-case basis with written approval of the City Engineer.

V-6

• e.Deep Manholes - A manhole shaft safety ledge shall be provided in all instances when the manhole shaft is 20 feet or greater in depth. Installation shall be in accordance with Los Angles County Flood Control District Standard -Drawing No. 2-D430.
• Inlets into Main Line Drains - Lateral pipe entering a main line pipe storm drain generally shall be connected radially. Lateral pipe entering a main line box structure shall conform to the following:
• a.Invert of lateral pipe 24 inches or less in diameter shall be no more than five feet above the invert.
• b.Invert of lateral pipe 27 inches or larger in diameter shall be no more than 18 inches above the invert, with the exception that catch basin connector pipe less than 50 feet in length may be no more than five feet above the invert.
• Minimum Pipe Size - The minimum diameter of mainline and catch basin connector pipe shall be 18 inches.
• In cases where the pipe may carry significant amounts of debris, the minimum diameter of main line pipe shall be 36 inches.
• Minimum Slope - The minimum slope for main line pipe shall be .001 (.10 percent), unless otherwise approved by the City Engineer. Pipe design shall allow for sufficient velocity to prevent silting.
• For debris carrying storm drains, the minimum pipe slope shall be 0.03 (3 percent).
• If the surface grade is less than 3 percent, a debris basin will be required upstream of the area which does not meet this criteria.
• Inlet Structures - An inlet structure shall be provided for storm drains originating, in natural channels. The structure shall generally consist of a headwall, wingwalls to protect the adjacent banks from erosion, and a paved inlet apron with a minimum 4 feet deep cutoff wall. The apron slope should be limited to a maximum of 2:1.

V-7

Wall heights should conform to the height of the water with one foot of freeboard upstream of the inlet, and be adequate to protect both the fill over the drain and the embankments. Headwall and wingwall fencing and protection barrier or trash rack shall be provided to prevent public entry. The trash rack should be used for inlets 48-inches (diameter or width) and smaller. For inlets larger than 48 inches a special designed trash rack may be required.

If debris is prevalent, barriers consisting of vertical 3-inch or 4-inch diameter steel pipe spaced at 1/3 the main line diameter or width to a maximum of 30 inches on centers should be embedded in concrete immediately upstream of the inlet apron.

7. Outlet Structures - When a storm drain outlets into a natural channel, an outlet structure shall be provided which prevents erosion and property damage. This outlet structure shall be designed with a cutoff wall having a minimum depth of three (3) feet. Velocity and direction of flow at the outlet should agree as closely as possible with the existing channel velocity. Fencing and a protection barrier shall be provided.
8. When the discharge velocity is low, or subcritical, the outlet structure shall consist of a headwall wingwalls, and an apron. The apron may consist of a concrete slab, or grouted rip-rap with a minimum 3 foot deep cutoff wall.
9. When the discharge velocity is high, or supercritical, the designer shall design bank protection in the vicinity of the outlet and an energy dissipater structure.
8. Protection Barriers and Trash Racks - A protection barrier is a means of preventing access to storm drains. Protection barriers may consist of large, heavy breakaway gates, single horizontal bars across catch basin openings, or chain link fencing around an inlet of an exposed outlet.
9. Protection barriers shall be provided wherever necessary to prevent unauthorized access to storm drains.
9. Debris Barriers - A debris barrier or deflector is a means of preventing large debris, such as tree limbs, logs, boulders and refuse, from entering a storm drain and plugging the conduit. The debris barrier should have openings wide enough to allow as much debris as possible to pass through

V - 8

and yet narrow enough to protect the smallest conduit in the system downstream of the barrier. It shall be the designer's responsibility to provide a debris barrier or deflector appropriate for the situation.

10. Other Closed Conduit Criteria
11. a.Angle of Confluence - In general, the angle of confluence between main line and lateral shall not exceed 30 degrees under any of the following conditions:
1. Where the flow (Q) in the proposed lateral exceeds 10 percent of the main line flow.
2. Where the velocity of flow in the proposed lateral is 20 fps or greater.
3. Where the size of the proposed lateral is 60 inches or greater.
4. Where hydraulic calculations indicate excessive head losses may occur in the main line due to the confluence.
5. Connector pipe may be joined to main line pipe at angles greater than 30 degrees up to a maximum of 90 degrees provided none of the above conditions exist. Connections shall not be made to main line pipe which may create conditions of adverse flow in the connector pipes.
6. b.The velocity in pipe shall not exceed 40 fps. For velocities from 20-30 fps, the minimum cover over steel in the pipe shall be 1/2 inch greater than the normal cover (1-1/2" minimum). For velocities from 30-40 fps, the minimum cover over the steel in the pipe shall be 1 inch, greater than the normal cover (2" minimum).
11. Open Channels - Open Channels will be designed in accordance with "Los Angeles County Flood Control District Design Manual, Hydraulic", dated (Latest Edition.)

V-9

12. Required Submittals
13. a.Plan and profile of the drainage system including all catch basin and connectors with hydraulic data.
14. b.Plot of hydraulic grade line on the profile for all flows investigated.
15. c.Catch basin calculations (sizing and water surface elevation).
16. d.Hydraulic calculations for mainline and connector pipes.

D. PEAK FLOW REDUCTION FACILITIES

Peak flow reduction facilities will consist of ultimate facilities identified in the Comprehensive Plan and Master Plan and interim facilities which will accommodate development before the Comprehensive Plan and Master Plan facilities are in place. Peak flow reduction facilities may include retention basins, flow-by or flow through detention basins, and flow through retarding basins. Retarding basins will be designed for detention and retention in combination.

Where the upstream watershed is undeveloped, the basins will be sized to handle undeveloped condition flows from the upstream tributary area and developed condition flows from the development itself.

Where the upstream watershed is developed, the method of handling the flows from the upstream tributary area will be determined based on the existing conditions with consideration of the future master plan and Comprehensive Plan facilities.

1. Retention Basins - Retention basins may be used if the results of percolation tests, performed and signed by a Soils Engineer or an engineering geologist show that the basin can percolate dry (no water in the basin) within seven (7) days.

In determining the required retention basin volume, Figure V-9 shall be used with an additional 1.35 multiplier in the K-Zone, 1.25 multiplier in the J-Zone and 1.1 multiplier in the I-Zone. Hydrologic soil classifications to be used with Figure V-9

V - 10

and the boundary of K-Zone, J-Zone and I-Zone are shown on Figure V-10.

Proper nonerosive emergency spillways directing flow away from private properties shall be provided.

Nuisance water flow shall not be allowed into the retention basins.

2. Detention and Retarding Basins'

• a.Detention basins will be allowed only if they are appurtenant to an approved storm drainage facility or approved blue line creek. They will be designed such that no more than 85% of the predeveloped peak flow rates for the 2, 10, and 25 year storm will discharge downstream.
• b.Retarding basins will route the entire storm runoff for 2, 10 and 25-year storms through the basin and provide outlets which will maintain the downstream flow at no more than 85 percent of respective peak predevelopment flows.

The minimum required flood storage volume for retarding basins is that volume described by the area between the 25-year storm runoff hydrographs for the post-development condition and predevelopment conditions on the rising limb up to 85 percent of the peak predevelopment flow plus the difference between the post-development hydrograph and 85 percent of the predevelopment condition peak flow as shown on Figure V-11. Hydrographs will be developed using the Los Angeles Department of Public Works Hydrology Manual.

Using this design procedure, the flow through retarding basin may be divided into two regions; the detention region and the retention region. The detention region shall be designed with adequate volume to assure that postdevelopment flows, for the 2, 10, and 25-year storm conditions, do not exceed 85% of respective predevelopment peak flows. The retention region volume, as a minimum, shall be the difference between the required flood storage volume and the detention volume, subject to other Conditions necessitated by basin design requirements. The retention volume shall be located such that it will not discharge downstream. The retention volume will not be considered as a credit in the detention region volume calculation.

V-11

The peak flow rate for the 2-year and the 10-year storms may be estimated using Figure V-12.

3. Required Retention, Detention, and Retarding Basin Characteristics and Features

• a.A spillway or an overflow structure will be provided to discharge 125 percent of 25-year storm runoff without flooding upstream development. Detention basin outflow shall not be allowed to run uncontrolled over a pedestrian facility or sidewalk. This does not apply to emergency overflow provisions.
• b.Entrance facilities shall be designed for the 25-year storm developed conditions except for sump conditions in which case the design will be for the 50-year storm developed condition.
• c.Nuisance Water shall not be introduced into a retention or a detention basin. A gutter or bypass flow device shall be installed to ensure that any nuisance water which bypasses drywells will also bypass detention, retention, and retarding basins. Development must mitigate all nuisance water developed on site.
• d.All detention basins shall incorporate a gravity drain of sufficient size or capacity to drain the detention basin dry (no water in the basin) within 24 hours, once runoff to the basin ceases.
• e.Retarding basins, because of their retention feature, will be subject to the same percolation criteria as retention basins. That is, they shall percolate dry within seven (7) days. If this is not possible, the City Engineer on a case-by-case basis may allow a pumping system to meet this criteria.
• f.All weirs, orifices, spillways, underdrains, and other control or design features which are subject to malfunction due to collection of trash or debris shall be protected, and the design of such features shall be clearly and adequately shown on the drawings of the detention basins

V-12

• g.Detention, retarding, and retention basins will be constructed as close to the Master Plan facilities as possible so that they can be eliminated in the future upon completion of the ultimate facilities.
• h.Freeboard will not be required in detention, retention, or retarding basins. However, an emergency spillway which can convey 125% of peak postdevelopment 25-year flow in a safe manner and preclude upstream flooding will be required.
• i.Basin side slopes shall be 2:1 or flatter, subject to slope stability analysis. Side slopes of 4:1 or flatter will be required if slope is planned to be mowed.
• j.Retention, retarding, and detention basin designs will incorporate a 15 ft. wide all weather drive access road to the basin floor to facilitate maintenance. The maximum slope of the access road shall be limited to 15 percent. Proper turning radius or a hammerhead shall be provided. The paved section shall be 12 feet wide and shall have a structural section of 3" AC over 4" aggregate base compacted to 95% or 5" PCC over proper base prepared as recommended by the soils engineer.
• k.For flow-by detention basins, a reinforced concrete low flow channel shall be provided from basin inlet(s) to basin outlet.
• For retention basins and retarding basins, an approved energy dissipater shall be provided at the basin's inlet to preclude erosion. In addition, those basins which incorporate retention storage, shall have a bypass flow device to carry nuisance water around and out of the basins should upstream drywells fail.
• All basins shall be fenced with a 6-foot high fence or wall approved by the City. Access to the basins shall be gated (15 ft. minimum) and locked.

V-13

E. PERCOLATION TEST PROCEDURE FOR RETENTION BASIN DESIGN

1. TEST PROCEDURE

a. PREPARING THE TEST HOLE

A hole 6" to 8" in diameter is excavated into the interval chosen to receive retention basin water. The depth of the hole will vary (depending on site conditions and preliminary basin design) but should be at least 10 feet below the elevation of the bottom of the proposed basin. Materials encountered in the hole should be logged continuously by a soils engineer or engineering geologist. Surficial deposits should be classified according to the Unified Soil Classification System (USCS). Bedrock should be described in accordance with standard geologic practice. The sidewalls should be vertical, the bottom should be as free of loose material as possible and covered with two inches of 1/2" to 3/4" gravel to prevent scouring upon addition of water. If the hole is likely to cave, it should be cased. The annular space between perforated casing and sidewall should be filled with gravel.

b. PRESOAKING

The percolation boring should be presoaked 24 hours in advance of the test. The hole should be filled with clear water to the bottom elevation of the proposed basin. The water level should not be closer than 4 feet to the ground surface.

c. MEASUREMENTS

At the start of the percolation rate test, the water level should be at the bottom elevation of the proposed basin. From a fixed reference point, the water level drops are measured to the nearest 0.5 inch with respect to the time of drop. After each measurement the water level is raised to the starting elevation.

V - 15

The- measuring and refilling operation is repeated until the water level drops are approximately stable. This occurs when three successive measurements do not vary by more than 5 percent. Final measurements at or after the point of stabilization are used to calculate percolation times.

Total depth of hole should be measured before and after the test measurements.

2. PRESENTATION

The percolation report shall be signed and sealed by a Civil Engineer or Certified Engineering Geologist licensed to practice in California and include the following:

a. TEST RESULTS

1. Describe test method used.
2. Provide test hole location map.
3. Provide logs of all test holes.
4. Provide copies of all field data and calculations. All data should be in tabular form.

b. DISCUSSION OF RESULTS

1. Discuss soil conditions encountered with regard to percolation rates obtained.
2. Discuss any variation in test results.
3. Discuss potential geotechnical hydrogeologic effects of percolation of retention basin water (mounding, hydrocollapse of near-surface soils, etc.).

V - 16

SAMPLE CALCULATION

RETENTION BASIN PERCOLATION TIME

To determine the time necessary to drain a simple rectangular basin, the following equations may be used. (For the sake of simplicity in this example, the access ramp is not considered. All calculations submitted for review shall include suitable allowance for the access ramp in the volume calculations.)

Necessary information:

1. Length, width and depth of basin.
2. Side slope angle.
3. Absorption rate of soil.

A 1 = L 1 boldmath × W 1

(1)

A2 = L2 × W2

(2)

Basin Volume V = (h (A 1 + A 2 + sqrt A 1 × A 2))/3

(3)

The average wetted area is the surface area of the basin still underwater when half of the total volume is empty. Basin depth at half volume is given by:

h prime = (h)/4[4-((A 1+2sqrt A 1× A 2 +3 A 2))/((A 1+sqrt A 1× A 2 + A 2))]

(4)

V-17

The wetted area is given by:

A w = (2 h prime(L 2+ W 2+2 h prime))/(sinβ)+ A 2

(5)

The time required for the basin to empty is given by:

T = (V)/(R × A w)

(6)

where R = percolation rate in gal/ft2/day.

The factor of safety is given by:

FS = 7/(T)

(7)

Example Retention Basin Problem

50' x 80' basin (bottom dimensions), 10' deep with 2:1 side slopes( = 26.6°), and an absorption rate of 20 gal/ft²/day.

A2 = (50)(80) = 4,000 ft 2

L 1 = L 2+(2 h)/(tanβ) = 80+(2(10))/(tan 26.6^circ) = 120'

W 1 = W 2+(2 h)/(tanβ) 50+(2(10))/(tan 26.6circ) = 90prime

A1 = (90)(120) = 10,800 ft 2

V - 18

V = underbrace h (A 1+ A 2+sqrt A 1× A 2) 3;; = underbrace 10(10,800+4,000+root((10,800)(4000))) 3 = 71,242 ft 2

V = 71,242 ft2 × 7.48 gal/ft3 = 532,892 gal

h prime = h [4-underbrace (A1+2sqrt A1× A2 +3A2); (A1+sqrt A1× A2 +A2);]; = 10 [4-underbrace [10,800+2root((10,800)(4000))+3(4000); [10,800+root((10,800)(4000))+4000];] = 5.8

Aw = (2 h prime[L 2 + W 2 +2 h prime])/(sinβ)+ A 2; = (2(5.8)(80+50+2(5.8)))/(sin26.6circ)+4000 = 7, 673 ft 2

T = underbrace V R * A _ w = underbrace 532,892 (20)(7,673) = 3.47 days

FS = 7/3.47 = 2.02

V-19

F. NUISANCE WATER MANAGEMENT

1. Nuisance Water Flow Generation

The design generation rate for nuisance water in single family residential areas is 160 gal/household/day (2.454-4 cfs) including a safety and longevity factor of 4.0. For calculations involving nuisance water, flows generated by applying this rate to the number of households upstream shall not be additive with offsite flows. Flow generated by subdrains, or from any other anticipated sources onsite shall be provided for.

Nuisance water generation rates for multi-family, commercial and industrial areas will be determined on a case-by-case basis.

Nuisance water shall be intercepted and disposed of whenever design flow depth in the gutter exceeds 3/4 inch or 6.6 gpm, whichever is less. Flow depth shall be calculated using Manning's Equation with n=0.014. Nuisance water inlets shall be sited to provide maximum utility and to minimize flows to cross gutters and detention basins. Nuisance water generated on-site will not be allowed to flow offsite as surface flow. Near and Far side inlets may be combined to flow to a single drywell disposal device.

For infill developments, all parcels one (1) acre or larger in size will be responsible for mitigation of flow generated by such development.

2. Drywell Guidelines

The City of Palmdale permits the use of drywells to dispose of nuisance water where such drywells have been designed and constructed according to the guidelines of this policy. Disposal capabilities of drywells shall not be considered in reducing the storage or detention volume necessary for detention, retention, or retarding basins.

Toxic wastes will not be disposed of in nuisance water drywells. In some cases, separators or other treatment devices may be required by the City Engineer.

V-20

3. Drywell Design and Construction

• a.The standard drywell is the Maxwell IV or equal. The standard drywell system shall include an Interceptor Well upstream of any drywell(s).
• b.Drywells will be offset a nominal distance of 20 feet from any surface inlet. When a drywell is constructed in conjunction with a surface inlet, the diameter of the connecting pipe from the interceptor well to the drywell shall be a maximum of 4 inches.
• c.Drywells constructed in a landscaped area shall have a rim elevation 2.0 inches above the finished elevation. Design of drywells in detention basins will not be allowed. Drywells are intended for nuisance water disposal, not storm water disposal.
• d.Drywells will remain sealed until all paving or landscaping is completed (or until new grass is stable) to prevent unnecessary sediment from being deposited in the drywell.
• e.Drywells will have a minimum settling basin depth of 25 feet, a 4 foot inside diameter, 30 inch bolt down grates and 6 inch drainage components. Drywell dimensions may be varied, subject to the approval of the City Engineer, if the settling volume is 250 cubic feet or greater.
• f.Drywells will be spaced a minimum of 75 feet center to center.
• g.The minimum distance between a drywell and a waterwell shall be 300 feet.
• h.Drywell design shall be in accordance with City Stds. D-1.1 and D-1.2

4. Drywell Performance and Inspection

a. A Soils Engineer or an Engineering Geologist shall perform percolation tests on each drywell installed to verify its capability to dispose of the anticipated inflows.

V-21

The approximate number of drywells will be determined by the project Civil Engineer at the design stage of the tract based on estimates by the Soils Engineer substantiated by a minimum of one percolation test. The proposed drywells shall be shown on the grading plan. Drywells may not be allowed in areas where known percolation problems exist. For such areas, percolation tests may be required at all proposed drywell locations at the Tentative Map feasibility stage. The final number of drywells shall be determined by the Civil Engineer after percolation tests are completed by the Soils Engineer or Engineering Geologist for each constructed drywell.

• b.The Public Works Department shall inspect each well site prior to placement of the concrete liner, filter rock backfill and drainage components.
• c.The field testing for the completed drywells shall be monitored and reported by a Soils Engineer or Engineering Geologist. A copy of this report must be submitted to the City Engineer for approval certifying that the system meets its requirements prior to the release of bonds for the development served by the drywell.
• d.Testing shall be done as follows:
• Disposal systems will be presaturated for at least 24 hours in advance of testing by filling with water to the top rim elevation allowing any trapped air to escape.
• Side walls will be cleaned of any clay or silt prior to testing
• After the 24 hour presaturation period has passed, the system will be again filled with water. As the water level drops, the time of water level change at ten (10) percent intervals of the well chamber depth will be recorded.

V-22

4) The capacity of the system shall be calculated using the following formula:

Cs = underbrace 10771 A Δ h Δ t

Cs Capacity of the system (gpd)

A Horizontal cross-sectional area (sf)

Δ h Vertical drop (ft) of water level during the test of the well

Δ t Time (minutes) for water level to drop Δ h

5. Location Near Water Wells and Saturated Zones

Drywells may not be constructed closer than 300 feet to a water well, and may not be deeper than 10 feet above any saturated zone.

6. Statement Appearing on all Plans Involving Drywells

The following statement shall appear on all plans which include drywells.

"All drywells shown on this project shall be maintained by the owners where their locations are on private property or through the creation of a Landscape Benefit Assessment District when approved by the City. Drywells will be replaced by the owners when they cease to drain standing surface water in a 24 hour period or are deemed to be obsolete by the City. Regular maintenance of the drywell settling chamber is required to achieve proper operation of the drywell and shall be performed annually or more often depending upon its location, and shall be performed by the owner or district as applicable".

7. Impermeable/Low Permeability Soils

Where subsurface conditions are such that drywells cannot be expected to perform to the minimum standards established herein, alternative disposal methods will be considered by the City. The location of suitable sites for disposal, even if off-site, is encouraged. The effectiveness of the offsite disposal areas must be demonstrated.

V-23

8. The Soils Engineer shall provide a seal depth for the drywells. That seal depth shall be determined by laboratory tests to determine the depth of potential hydrocollappsible soils.

9. Further drywell design information is contained in Section V.F.3 of this document.

H. DEFINITIONS

Natural Watercourses - A natural watercourse is a path along which water flows as a result of natural topographic features. Furthermore, for the purposes of this definition, a natural watercourse drains a watershed greater than 100 acres and also meets one or more of the following conditions:

1. Experiences flow velocities greater than five feet per second while carrying a Capital Flood.
2. Has flow depths greater than 1.5 feet while carrying a Capital Flood.
3. Would have water surface elevations, while carrying a Capital Flood, within one foot of the finished floor elevation of adjacent habitable structures, if such water surface elevations would result from construction of facilities with less than a Capital Flood capacity.
4. If it is desirable to develop adjacent to a natural creek and leave the creek undisturbed, the following shall be the minimum requirements:
5. a.Setbacks: Setbacks shall be determined by flat calculating the area needed to contain the 50 year developed storm, then adding one foot of freeboard. This will define the boundary of the creek. The setback from that boundary shall be determined by projecting an additional ten (10) feet horizontally and from that point a slope of 2:1 until natural ground is intercepted.
6. b.Flood area: The area described in the preceding paragraph, including the area for setback, shall be designated as a "FLOOD AREA" on the map.

V-24

• c.Irrevocable offer of dedication: The developer shall provide an irrevocable offer of dedication for drainage purposes to the City for the land designated as a flood area.
• d.Private Ownership: The land designated as a 'FLOOD AREA' shall be privately-owned and maintained.
• Depression or Sump - A depression or sump is an area for which there is no surface route to outlet flows. Furthermore, for the purposes of the definition, a depression or sump also meets one or more of the following conditions:
• Would have a ponded water surface elevation, during a Capital Flood, within one foot of the finished floor elevation of adjacent habitable structures, if such elevation would result from construction of facilities with less than a Capital Flood capacity. This condition does not apply if there is a surface route for outflow such that the ponded water surface cannot reach the finished floor elevation of adjacent structures during a Capital Flood.
• In a roadway, would have a ponded water surface elevation higher than the elevation of the public right of way line if facilities with less than a Capital Flood capacity were constructed. This condition applies to flows which reach the roadway upstream of the sump and are conveyed to the sump by the roadway.
• Has a ponded depth of three feet or greater.
• An exception is made for fenced or walled detention, retarding, or retention basins.

Floodway - The floodway is the channel of a stream plus any adjacent floodplain areas which must be kept free of encroachment so that the 50-year storm runoff can be carried without substantial increases in flood heights. Such increase in height will not exceed one (1) foot.

The floodway, as defined in this Management Plan, does not correspond to the floodways defined in FEMA maps.

V - 25

HYDROLOGY CHECK LIST Required submittals - Improvement Plan stage)

Hydrology Map-Existing Conditions

[ ] Scale 1" = 500' or less.

[ ] Entire drainage basin shown in relation to a City of Palmdale Master Plan drainage facility.

[ ] Contours/elevations to adequately define drainage areas.

[ ] Existing land use adequately labeled.

[ ] Nodes labeled and consistent with report.

[ ] Storm drain facilities clearly shown.

[ ] Pertinent discharge data.

[ ] Flow lines used in calculations.

[ ] Basin location and type of basin noted.

[ ] Emergency spillway.

Hydrology Map - Developed Conditions

[ ] Scale 1" = 500' or less.

[ ] Entire drainage basin shown in relation to a City of Palmdale Master Plan drainage facility.

[ ] Contours/elevations to adequately define drainage areas.

[ ] Existing land use adequately labeled.

V-26

[ ] Nodes labeled and consistent with report.

[ ] Storm drain facilities clearly shown.

[ ] Pertinent discharge data.

[ ] Flow lines used in calculations.

[ ] Basin location and type of basin noted.

[ ] Emergency spillway.

[ ] Proposed road system clearly shown.

[ ] Street grades noted.

[ ] Typical street sections.

Hydrology Calculations

[ ] Sealed and signed by RCE with expiration date noted.

[ ] Initial time of concentration calculations or appropriate nomograph.

[ ] Predevelopment hydrographs at downstream end of project for 2-, 10- and 25-year storms (project only and combined with upstream drainage basin).

[ ] Postdevelopment hydrographs at downstream end of project for 2-, 10- and 25-year storms (project only and combined with upstream drainage basin).

V - 27

Hydraulic Calculation

[ ] Reservoir routing calculations for 2-, 10-, and 25-year storms.

[ ] Street hydraulic calculations to show 10-year runoff contained with curbs

[ ] Street hydraulic calculations to show 25-year runoff contained within right-of-way.

[ ] Street hydraulic calculations to show that finished floor is at least one foot above 50-year water surface.

[ ] Basin overflow spillway calculations.

Miscellaneous

[ ] Soil map

[ ] Rainfall zone map

[ ] Percolation test report

[ ] Conditions of approval

V - 28

RETENTION BASIN HYDROGRAPH VOLUME COEFFICIENTS 25- YEAR CURVE

Volume (AF) = 1.25 x Coefficient x Area (AC) (in J - Zone)

Volume (AF) = 1.1 x Coefficient x Area (AC) (in I - Zone)

Volume (AF) = 1.35 x Coefficient x Area (AC) (in K - Zone)

imp* Soil 0% 5% 10% 15% 20% 30% 40% 50% 90% 100%

120 0.014 0.0287 0.0435 0.0582 0.0729 0.1024 0.1319 0.1614 0.2792 0.3087

123 0.0891 0.1001 0.111 0.122 0.133 0.155 0.1769 0.1989 0.2867 0.3087

124 0.0032 0.0185 0.0337 0.049 0.0643 0.0948 0.1254 0.1559 0.2781 0.3087

134 0.0055 0.0206 0.0358 0.051 0.0661 0.0964 0.1268 0.1571 0.2784 0.3087

FIGURE V-9

SECTION VI

LANDSCAPING

A. GENERAL REQUIREMENTS

The guidelines, criteria and standards presented herein establish the minimum acceptable standard for design and preparation of Landscape Maintenance Assessment District 89-1 landscape and irrigation plans for approval by the City of Palmdale.

Landscaped areas that are to be incorporated into the Landscape Maintenance Assessment District 89-1 shall require approval by the City Landscape Architect.

In addition to the Assessment District landscaping, all on-site slope landscape and irrigation plans as required per the grading plan shall require approval by the City Landscape Architect.

Prior to submittal, a Licensed Landscape Architect must sign (wet signature) and stamp each sheet of plans and indicate license number and expiration date.

B. SUBMITTAL REQUIREMENTS

All prints submitted shall be folded to a size no larger than 9" x 12".

1. The initial submittal of a Landscape Plan for review shall include the following to be submitted to the City Engineer's office - Plan Check Division:
2. a.Approved Grading Plan - one (1) copy
3. b.Tentative Tract Map - one (1) copy
4. c.All Approved Conditions of Approval - one (1) copy
5. d.Landscape and Irrigation Plans - two (2) copies

VI-1

2. Subsequent submittals to the City shall include:
3. a.The previous check prints
4. b.Revised plans - two (2) copies
5. c.Any additional material requested by the plan checker
3. In addition to those items listed above, the following items must be submitted for formation of the Landscape Assessment District prior to the approval of the Landscape plans:
4. a.District Diagram - one copy (See Exhibit VI-A)
5. b.Assessment of Maintenance Costs - one copy (See Exhibit VI-B)
6. c.Itemized Estimate of Probable Construction Costs - one copy

C. PLAN PREPAPATION

1. All plans shall be original drawings.
2. All plans shall be accurately and clearly drawn.
3. The plan size shall be 24" x 36", ink on 3 mil mylar and a minimum scale of 1" = 20'.
4. The first sheet shall be a title sheet and include:
5. a.Location map showing the following:
1. Project location
2. Major Cross Streets
3. North arrow
4. Scale

VI-2

• b.Index map showing the following:
• Street configuration within the project
• Lot configuration and numbers
• Project boundaries
• Landscape Maintenance Assessment District areas (i.e. streetscapes and detention basins)
• Street names
• Index of Sheets
• North Arrow
• Scale: 1" = 200'
• c.Title Block containing the Tract number and Tentative Tract number if applicable; phase number if applicable; Landscape Maintenance Assessment District Area Number.
• d.Landscape Architectural firm name, address, telephone number, date of plan preparation, stamp and signature of Registered Landscape Architect.
• c.Name, address and telephone number of owner and developer.
• f.Approval block for plan checker and City Landscape Architect's signatures and dates.
• g.Revision block with revision number, date, initials of landscape architect, description of plan change, and spaces for City approval and date. All revisions within the plan shall be referenced on the title sheet.
• h.General Notes
• The sheets following the title sheet shall include the following:
• a.Precise location of all utilities, structural elements (including walls), hardscape, existing vegetation and topographic conditions (expressed as slope gradients) within the landscaped areas.
• b.All existing and proposed easements for drainage devices, roadways, utilities, etc.

VI-3

• c.and toe of all cut and fill slopes.
• d.Signature block for plan checker (plan checker will sign all sheets, City Landscape Architect will sign only the Title Sheet).
• e.North arrow and scale, 1prime prime = 20 scale minimum, include bar scale.

D. GENERAL NOTES

1. All work shall be performed by a licensed landscape contractor.

2. Landscape contractor shall obtain a Landscape Permit from the Landscape Architect's office prior to commencement of work.
3. All work shall conform to Standard Specifications for Public Works Construction (SSPWC), latest edition, (published by Building News, 3055 Overland Avenue, Los Angeles, CA) for all work performed and not specifically mentioned herein.

4. All work shall be done in accordance with the plans, specifications, and any special requirements of the permit. Any violation will result in the stoppage of all work until the violation is corrected.

5. No work shall commence on the project until a pre-construction conference has been held with the City Landscape Architect or an authorized representative.

6. The contractor shall be responsible for notifying the City Landscape Architect for au required site visits as follows:

VI-4

7. Contractor shall make himself familiar with all underground utilities, pipes and structures. Contractor shall take sole responsibility for any cost incurred due to damage of said utilities. Prior to the commencement of work the contractor shall contact Underground Service Alert (800)422-4133 for location of underground utilities.
8. Do not willfully proceed with Construction as designed when it is obvious that unknown obstructions, area discrepancies and/or grade differences exist that may not have been known during design. Such conditions shall immediately be brought to the attention of the owner. The contractor shall assume full responsibility for all necessary revisions due to failure to give such notification.

9. TEMPORARY EROSION CONTROL

• a)The surface of all slopes more than (3) feet in vertical height and steeper than 5:1 shall be covered with City of Palmdale approved erosion control blankets. Installation shall conform to manufacturer's specifications. Deviations from this requirement shall be submitted in writing with an alternative plan for temporary erosion control (water and dust). This plan shall be approved by the City Engineer.
• b)Installation of the erosion control blankets shall be installed to the satisfaction of the City of Palmdale Landscape Architect prior to the acceptance of rough grading.

10. PERMANENT EROSION CONTROL

• a)The surface of all slopes more than three (3) feet in vertical height and steeper than 5:1 shall be covered with City of Palmdale approved erosion control blankets. Installation shall conform to manufacturer's specifications.
• b)The surface of all slopes more than three (3) feet in vertical height and steeper than 5:1 shall be protected against damage by erosion by planting with ground cover plants. Slopes exceeding fifteen (15) feet in vertical height shall also be planted with trees spaced at no more than twenty (20) feet on center or shrubs spaced at no more than ten (ten) feet on center or a combination of both. All plant material shall be triangularly spaced.

VI-5

• c)Slopes required to be planted shall be provided with an approved system of irrigation.
• d)All required landscaping shall conform to the City of Palmdale Slope Erosion Control Landscaping standards.
• e)All planting and irrigation shall be installed to the satisfaction of the City of Palmdale Landscape Architect prior to acceptance of final grading. Contact the Landscape Architect at (661) 267-5255 for inspection with a minimum of 24 hours notice.

E. LANDSCAPE DESIGN CRITERIA

Landscaping shall conform to Standard Specifications for Public Works Construction (SSPWC), latest edition, (published by Building News, 3055 Overland Avenue, Los Angeles, CA) for all work performed and not specifically mentioned herein. In case of a discrepancy, the following criteria shall govern.

1. GENERAL REQUIREMENTS

The design shall be prepared in such a way as to minimize the amount of supplemental water required. The landscape architect's approach to such a "xeriscape" concept shall be provided for the plan checker on the Plans.

A water-conserving approach to landscape design can be implemented through a variety of techniques and practices including the use of appropriate plant material, the placement of plant material into compatible irrigation zones, irrigation techniques, irrigation products, irrigation management, evaporation control, etc. Such techniques shall be addressed in the above mentioned "xeriscape" concept.

General guidelines for water conservation will be expanded upon in the individual planting and irrigation sections.

2. IRRIGATION

a. General

The irrigation system shall be a fully automatic system. Irrigation plans shall indicate location of irrigation heads, valves, time clocks, pipe, backflow devices, points of connection, sizes and models of equipment specified.

VI-6

Installation specifications shall be indicated whenever possible. Installation shall conform to the City approved irrigation details included herein.

The irrigation system shall be organized into zones based upon plant material selections and environmental considerations (i.e. sun exposure, slope aspect, soil conditions, etc.)

The selection of irrigation systems components shall be based upon the overall design and upon water conservation principles. A minimum of 25% of each landscape shall be irrigated with low volume systems. The designer shall indicate on the irrigation plan the proposed water management principles.

The irrigation system must provide complete coverage for all areas (head to head coverage when spray heads are used). Closer spacing may be required due to climatic and site conditions (i.e. areas of excessive wind).

Where above ground irrigation components (such as automatic controllers and backflow devices) are placed on slopes, low retaining walls and/or curbing shall be required to prevent erosion.

b. Backflow Device

The backflow prevention device shall be a reduced pressure backflow installed at least twelve (12) inches above grade, measuring from the bottom of the device.

The backflow device shall be winterized/wrapped with a Thermo-cel insulation tape to R-I0 protection and enclosed in a locking LeMeur Steel enclosure or equal mounted on a concrete pad. The risers shall be galvanized steel.

The contractor shall provide a padlock and two keys (per City standards) for each steel enclosure.

c. PVC Pipe and Fittings

Pressure supply lines downstream of the backflow prevention device shall be Class 315 PVC in sizes 2" and larger and Schedule 40 PVC in sizes 1-1/2" and smaller. Non pressure lines shall be scheduled to be 40 PVC.

VI-7

All fittings shall be standard weight Schedule 40 PVC.

All threaded nipples shall be standard weight Schedule 80 with molded threads. Solvent cement joints shall be made as prescribed by the manufacturer. An aggressive primer shall be used in conjunction with a solvent primer designed for the fit of the pipe and fittings of each size range specified.

Provide a minimum of 24" cover for all pressure lines 4" and larger.

Provide a minimum of 18" cover for all pressure lines 3" or smaller.

Provide a minimum of 12" cover for all non-pressure lines.

Concrete thrust blocks shall be installed on all pressure line changes of direction and pipes exceeding 2" in diameter.

d. Sprinkler Heads

Double ell swing joints shall be installed on all riser assemblies.

All spray heads in the right-of-way shall be a pop-up type.

Spray heads shall have a screw adjustment.

Riser nipples for all sprinkler heads shall be the same size as the riser opening of the sprinkler body.

e. Bubblers

A tree bubbler system shall be installed to each tree (see detail). A bubbler shall be installed to each shrub unless the planter shall be irrigated with flat spray heads on 12" high pop sprinters. All bubblers shall be pressure compensating.

All tree bubblers shall be installed on valves separate from the other planting.

VI-8

f. Valves

Gate valves shall be designated for a minimum working pressure of not less than 150 PSI or the minimum PSI available on site, whichever is greater. If designing to site pressure, indicate the minimum PSI available on the irrigation plan.

Quick coupling valves shall be installed on the mainline a minimum of every one hundred (100) feet. Quick coupling valves shall be of red brass with a wall thickness guaranteed to withstand normal working pressure of 150 PSI without leakage.

Valves shall be Rainbird EFA-CP series or equal.

Valve boxes for all gate valves and quick coupling valves shall be 9" x 24" round box, Brooks #9 or approved equal.

Valve boxes for all electric control valves shall be 12"x 18" rectangular box, Carson Industries or approved equal.

g. Wiring

Wire shall occupy the same trench and shall be installed along the same route as the pressure supply lines whenever possible. When more than one wire is placed in a trench, the wiring shall be taped together at intervals of ten feet.

Wire connections shall be made using Scotch Lok Unipack waterproof sealing packets, Pentite connectors, or an approved equal. Size expansion loops of twelve inches shall be provided at each wire connection and/or directional turn. Use one splice per connector sealing pack.

Sizing of wire shall be according to manufacturer's recommendations, but not smaller than 14 gauge in size.

Use continuous wire between remote control valves and the controller/timer. All wire of exposed runs to be in conduit.

All control wire shall be black in color. All ground wire (14 g) shall be white in color.

VI-9

A red wire (14 g) shall be installed to each valve from the controller with an excess of wire at each valve.

h. Automatic Controller

Automatic controllers shall be Rainbird ISC series or equal.

Automatic controllers shall be installed in a solid LeMeur or equal locking enclosure. The automatic controller shall be placed in such enclosure apart from the backflow prevention device, and next to the tract boundary wall wherever possible.

The contractor shall provide a padlock and two (2) keys (per City standards) for each enclosure.

i. Detention/Retention Basins

All landscaping at or within the basins shall be on valves separate from the streetscape landscaping.

All trees at or within the basins shall be irrigated with tree bubblers (two per tree) on valves separate from the rest of the system.

Rotor sprays are recommended for large areas; impact heads are not allowed.

No sprinklers shall be installed at the toe of the slope or in the bottom of the basin.

IRRIGATION NOTES (to be placed on the irrigation plan)

1. The contractor shall obtain and pay for any and all permits and all inspections required, including, but not limited to:
2. a.City of Palmdale plumbing permit;
3. b.Backflow certification.
2. The manufacturer's directions and detailed drawings shall be followed in all cases where the manufacturers of article used in this installation furnish directions covering points not shown in the drawings and specifications.

VI-10

3. A complete material list shall be submitted prior to performing any work for an items that are requested to be substituted. Material list shall include the manufacturer, model number and description of all materials and equipment to be used.

Equipment or materials installed or furnished without prior approval of the City Landscape Architect may be rejected and the Contractor required to remove such materials from the site at his own expense.

4. Record Drawings and Controller Charts

a. The Contractor shall dimension from two permanent points of reference (building comers, sidewalks, road intersections, etc.) the location of the following items:

connection to existing water lines;

• connection to existing electrical power;
• gate valves;
• routing of sprinkler pressure lines;
• sprinkler control valves;

quick coupling valves;

• b.On or before the final inspection, the Contractor shall deliver the corrected and completed sepias to the City Landscape Architect. Delivery of the sepias will not relieve the Contractor of the responsibility of furnishing required information that may be omitted from the prints.
• c.Record drawings shall be approved by the City Landscape Architect before controller charts are prepared.
• d.Provide one controller chart for each controller supplied. The chart shall indicate the area controlled by the automatic controller and shall be the maximum size which can be stored within the controller cabinet door without folding.

VI-11

• e.The controller chart shall be a blackline or blueline ozalid print. A different color shall be used to indicate the area of coverage for each station (valve).
• f.When completed and approved, the controller chart shall be hermetically sealed between two pieces of plastic, each piece being a minimum of 10 mils thick.
• g.These controller charts shall be completed and approved prior to final inspection of the irrigation system.
• The backflow prevention device shall be tested and certified by the Los Angeles County Department of Health Services - Cross Connections and Water Pollution Control Program and proof submitted to the City of Palmdale.
• The irrigation system shall be flushed prior to installation of irrigation heads.

7. Final location of the automatic controller shall be approved by the City Landscape Architect.

8. The irrigation trenches shall not be backfilled until all required tests are performed.

9. Field Quality Control

Adjustment of the System

• a.The Contractor shall flush and adjust all sprinkler heads for optimum performance and to prevent overspray onto walks, roadways, and buildings as much as possible.
• b.If it is determined that adjustments in the irrigation equipment will provide proper and more adequate coverage, the Contractor shall make such adjustments prior to planting. Adjustments may also include changes in sizes and degrees of arc as required.
• c.Lowering raised sprinkler heads by the Contractor shall be accomplished within 10 days after notification by the City.

VI - 12

• d.All sprinkler heads shall be set perpendicular to finished grades unless otherwise designated on the plans.
• Testing of the Irrigation System
• a.The contractor shall request the presence of the City Landscape Architect at least 48 hours in advance of testing.
• b.Test all pressure lines under hydrostatic pressure of 150 lbs./sq.in. and prove watertight.
• c.Sustain pressure in lines for not less than two hours. If leaks develop, replace and repeat test until entire system is proven watertight.
• d.All hydrostatic tests shall be made in the presence of the City Landscape Architect. No piping shall be backfilled until it has been inspected, tested and approved in writing.
• e.When the sprinkler irrigation system is completed, perform a coverage test in the presence of the City Landscape Architect to determine if the water coverage for planting areas is complete and adequate. Furnish all materials and perform all work required to correct any inadequacies of coverage due to deviations from plans where the system has been installed as indicated on the drawings or when it is obviously inadequate without bringing this to the attention of the Landscape Architect. This test shall be accomplished before any ground cover is planted.
• PLANTING

a. General Requirements

The planting design shall be based upon the principles of water conservation: grouping of plant material based upon like water requirements, ecological requirements, climatic conditions, selection of drought tolerant plant material, etc.

All plants shall be selected from the City of Palmdale Recommended Plant List. Requests for deviations from this list should be submitted in writing with information provided on the selected material,

VI-13

including growth habit, diseases and pests, root patterns, general characteristics, drought tolerance and compatibility with Sunset Zone 11 climate (high desert).

A maximum of 25% of the landscaped area may be planted in turf. (The plans shall indicate the amount of area, in square feet, planted in ground cover area and in turf area.) Planting plans shall indicate the location, genus and species, quantities and sizes of all plant material. Planting details and specifications shall also be provided. Planting details shall encompass the specifications provided herein and conform to the American Public Works Association Standard Plans. All specifications provided herein shall supersede the standard plans where discrepancies exist.

b. Plant material

All trees shall be a minimum of 15 gallon size.

A minimum of 20 % of all trees shall be 24" box size or larger.

The quantity and species of trees shall require approval from the City Landscape Architect.

All street trees shall be selected from the approved plant list for street trees.

All trees shall be planted not less than:

seven (7) feet from adjacent property lines;

• fifty (50) feet from the beginning of curb returns on approach to an intersection and fifteen (15) feet from end of curb return on an exit side of curb return;
• twenty (20) feet from lamp standards;
• ten (10) feet from fire hydrants and driveways;
• five (5) feet from service walks, water meters and drain pipes.

On all streets where the sidewalk is adjacent to the curb, street trees shall be installed three (3) feet BACK of the sidewalk, or a minimum of seven and a half (7 1/2) feet BACK of curb face.

VI-14

Shrubs shall be a minimum of five size. Deviations from this requirement shall be submitted in writing and shall be based upon species, site conditions, climatic conditions, etc.

Shrubs shall be located a minimum of 36" from all sidewalks.

Ground cover shall be prostrate shrubs or flatted ground cover, or a combination of both. Spacing for ground cover shall be 12" O.C. for flatted ground cover. Spacing for prostrate shrubs shall be dependent upon species characteristics.

A mulch (organic or inorganic) can be substituted for ground cover in certain design situations. Approval by the City Landscape Architect is required.

Vines shall be a minimum of 5 gallon size.

Turf shall be a "drought resistant" tall fescue or equal. All turf shall be provided as sod. Turf shall not be located where the slope exceeds 4:1.

Seed for hydroseeding the detention/retention basins shall be as specified by the City Landscape Architect.

c. Related Landscaping Material

Organic Soil amendment shall be Type 1 as described in the Standard Specifications for Public Works Construction. Mulch shall comply with the same requirements.

Planting tablets for shall be Agriform 20-15-5 two year timed release or approved equal. Hydroseeding material shall be as follows:

"Hydro-mulch" as manufactured by Conwed, or approved equal;

Ecology Control "M-Binder" organic seeding additive, or approved equal.

Guying and staking materials shall be as follows:

Wood tree stakes shall be lodgepole pine, fully treated with Coppernaphthanate wood preservative, 2" (minimum nominal size) diameter;

VI-15

Wood tree stakes shall be 10 feet long for 24" box trees and 8 feet long for 15 gallon trees;

Tree ties shall be 12 gauge wire and new garden hose;

• Guying Hardware:

Wire: Pliable 9 gauge galvanized

Hose: 1/2" new black rubber hose

Tumbuckles: galvanized or dip painted, size as required

Cable Clamps: galvanized, size as required

Safety Sleeve: 1/2" white PVC full length of wire

Deadman: 2"x 6"x 36" construction grade redwood.

Mulch shall be "Walk-On Bark", by Sequoia Forest Products, or approved equal

Erosion control matting shall be as specified in the standards for slope planting.

All mow strips and headers shall be concrete curbing.

Root barriers shall be 24" Universal Root Barrier by Deep Root Corporation, or approved equal.

Arbor Guards shall be by Deep Root Corp., or approved equal.

d. Fine Grading and Headers

Installation of all landscaping shall conform to the Standard Specifications for Public Works Construction.

No slopes in the Landscape Assessment District shall exceed 3:1.

All slopes in excess of 5:1 shall be installed per the City's Standards for Slope Landscaping.

Final grade shall ensure positive drainage of the site.

A minimum of eighteen inches of level planting area shall be provided at the base of all slopes.

VI-16

Concrete headers shall be installed between shrub beds and turf areas and at all limits of work not already defined by walls, curbing, sidewalks, etc.

e. Tree, Shrub and Vine Planting

All excavated holes shall be twice the diameter and one and one half the depth of the root ball.

Container plants shall be backfilled with:

• 6 parts by volume on-site soil
• 4 parts by volume organic amendment
• 3 lbs. of commercial fertilizer

Planting tablets shall be placed in the excavated planting holes in the following quantities:

1 tablet per one gallon container

2 tablets per five gallon container

3 tablets per 15 gallon container

8 tablets per 24" box

12 tablets per 36" box

An earthen basin shall be constructed around each plant.

Vines shall be removed from nursery stakes and securely attached to walls or fencing.

f. Stalking and Guying:

All 15 gallon and 24" box size trees shall be staked with two tree stakes placed perpendicular to the prevailing wind.

The tree stakes shall not penetrate the root ball.

All 36" box size and larger trees shall be guyed.

VI-17

g. Miscellaneous Planting Requirements

Install arbor guard trunk protectors or approved equal at the base of all trees located in turf areas.

Install deep root barriers on all trees within five feet of the back of sidewalk or curb.

h. Detention/Retention Basins

Landscaping plans are required for all basins.

The basins are to enclosed with walls.

A landscape buffer is to be planted between the sidewalk and the enclosure (minimum of 5' width).

The slopes of the basin (inside the enclosure) are to be hydroseeded with a drought tolerant mix as approved by the City Landscape Architect.

Pinus eldarica "Mondell" shall be planted at 25' O.C. at the top of slope inside the basin enclosure.

PLANTING NOTES(to be added to the planting plans)

1. Deliver all plant material with legible identification tags.
2. Fertilizer shall be a commercial fertilizer consisting of the following percent by weight:

5 - Nitrogen

3 - Phosphoric Acid

1 - Potash

50 - Humus

15 - Humic Acids

VI-18

3. The following amendments shall be uniformly spread and thoroughly cultivated by means of mechanical filler (wherever possible) into the top six (6) inches of soil.

Application rate is per 1,000 square feet

Nitrogen stabilized organic amendment - 4 cu.yd.

• Commercial fertilizer - 2 lbs.
• Agricultural gypsum - 100 lbs.
• Soil sulfur - 2 lbs.
• Elemental zinc - 2 lbs.
• Iron sulfate - 2 lbs.

The above soil amendment may be changed based on the results of an agricultural analysis performed by a soil testing facility.

4. A pre-emergent herbicide shall be applied in all appropriate Planting areas prior to planting as approved by a state licensed Pest Control Advisor.
5. Container plants shall be backfilled with:
6. 6 parts by volume on-site soil
7. 4 parts by volume organic amendment
8. 3 lbs. of commercial fertilizer

6. planting tablets shall be placed in the excavated planting holes in the following quantities:

• 1 tablet per one gallon container
• 2 tablets per five gallon container
• 3 tablets per 15 gallon container
• 8 tablets per 24" box
• 12 tablets per 36" box
• Staking and Guying of trees shall be completed immediately upon planting
• Install arbor guard trunk protectors or approved equal at the base of all trees located in turf areas.

VI - 19

9. Install deep root barriers on all trees within five feet of the back of sidewalk or curb.
10. Maintenance by developer/landscape contractor:

After installation, the contractor shall notify the City Landscape Architect for an inspection to approve the installation.

After approval of the installation, the developer shall maintain the landscaping in a thriving condition for a period of one year prior to acceptance of this work by the City. Failure to adequately maintain such work throughout the maintenance period shall result in the time extension of the developer's maintenance period.

All utilities and other fees must be fully paid and proof of payment submitted to the City prior to acceptance and takeover by the City of Palmdale.

VI-20

F. SLOPE EROSION CONTROL STANDARDS

1. TEMPORARY EROSION CONTROL

• A.The surface of all slopes more than three (3) feet in vertical height and steeper than 5:1 shall be covered with City approved erosion control blankets. Installation shall conform to the manufacturer's specifications. Deviations from this requirement shall be submitted in writing with an alternative plan for temporary erosion control. This plan shall be approved by the City Engineer.
• B.Installation of the erosion control blankets or other approved devices or procedures shall be installed to the satisfaction of the City Engineer prior to acceptance of the rough grading.

2. PERMANENT EROSION CONTROL

• A.The surface of all slopes more than three (3) feet in vertical height and steeper than 5:1 shall be covered with City approved erosion control blankets. Installation shall conform to manufacturer's specifications.
• B.The surface of all slopes more than three (3) feet in vertical height and steeper than 5:1 shall be planted with ground cover plants. The ground cover shall be from flatted rooted cuttings, triangularly spaced at 12" O.C. Ground cover shall be selected from the following list:

Rosmarinus officinalis prostrate, Dwarf Rosemary

• Baccharis pflularis "Twin Peaks", Dwarf Coyote Brush
• Hypericum calycinum, St. Johnswort
• Lonicera japonica halliana, Hall's Hardy Honeysuckle

Requests for substitutions shall be submitted in writing and shall be based upon climatic, ecological and site conditions. Substitutions shall be demonstrated to have rooting characteristics necessary for erosion control.

VI-21

C. In addition to ground cover, slopes exceeding fifteen (15) feet in height shall be planted with trees at twenty (20) feet O.C. or shrubs at ten (10) feet O.C. or a combination of both at equivalent spacings.

Trees shall be selected from the following list:

• Albizia julibrissin, Mimosa
• Chilopsis linearis, Desert Willow
• Koelreuteria paniculata, Golden Rain Tree
• Pistacia chinensis, Chinese Pistacio
• Cedrus deodora, California Christmas Tree
• Pinus eldarica, Mondell Pine

Pinus pinea, Italian Stone Pine

Requests for substitutions shall be submitted in writing and shall be based upon climatic, ecological and site conditions. Substitutions shall be demonstrated to have rooting characteristics necessary for erosion control.

• D.Planting need not be provided for cut slopes rocky in character and not subject to damage by erosion and slopes protected against erosion damage by other methods when such methods have been specifically recommended by a soils engineer, engineering geologist or equivalent authority and found to offer erosion protection equal to that provided by the planting specified in this section.
• E.Slopes required to be planted shall also be irrigated with a permanent, electrically controlled automatic system designed to cover all portions of the slopes.

The irrigation system shall be installed with an approved backflow device.

All piping shall be installed underground. Trenches shall be compacted to the adjacent grade.

Impact type irrigation heads shall not be allowed. Stream rotors are required for large areas.

A minimum of head to head coverage is required.

VI - 22

• F.Planting and irrigation plans shall be submitted for slopes required to be planted and irrigated. Such plans shall be prepared and signed by a licensed Landscape Architect.
• G.All planting and irrigation shall conform to the standards set forth in the City of Palmdale landscape and irrigation standards.
• H.All planting and irrigation shall be installed to the satisfaction of the City of Palmdale Landscape Architect prior to acceptance of final grading. Contact the Landscape Architect at (661) 267-5255, a minimum of 24 hours in advance of requested inspection.
• MATERIAL SPECIFICATIONS FOR EROSION CONTROL BLANKETS
• A.The erosion control blanket shall consist of 100% agricultural straw and shall be of a consistent thickness over the entire area of the mat.
• B.The erosion control blanket shall be covered on the top and the bottom with a polypropylene netting having an approximate 1/2" x 1/2" mesh. The blanket shall be sewn together with cotton thread.

VI-23

LANDSCAPE PLAN CHECK LIST SUBMITTAL REQUIREMENTS

[ ] Prints folded to 9" x 12".

[ ] Approved Grading Plan.

[ ] Tentative Tract Map.

[ ] Conditions of Approval.

[ ] Landscape and Irrigation Plans.

[ ] District Diagram

[ ] Assessment of Maintenance Costs.

[] Itemized Estimate of Probable Construction Costs.

VI-24

LANDSCAPE PLAN CHECK LIST TITLE SHEET

[ ] 24" x 36" Sheet Size.

Location Map - project location, major cross streets, north arrow and scale.

[] Index Map - street configuration, lot configuration and numbers, project boundaries, Landscape Maintenance District areas, street names, index of sheets, north arrow, scale = 1"-200'.

[ ] Title Block - tract number, tentative tract number if applicable, phase numbers if applicable, Landscape Maintenance District area number.

[] Landscape Architects seal, expiration, signature and date signed.

[ ] Name, address and telephone of Landscape Architect.

[ ] Name, address and telephone number of the developer.

[ ] Approval block.

[ ] Revision block.

[ ] General Notes.

[ ] Complete list of Construction Notes.

[ ] Title block.

VI-25

LANDSCAPE PLAN CHECK LIST LANDSCAPE PLAN (PLANTING AND IRRIGATION)

[ ] Precise location of all utilities, structural elements (including walls), hardscape, existing vegetation and topographic conditions (expressed as slope gradients) within the landscaped areas.

[ ] All existing and proposed easements.

[ ] Top and toe of all cut and fill slopes.

[ ] Signature block for plan checker.

[ ] North arrow and scale, $1" = 20'$ minimum, include bar scale.

VI - 26

LANDSCAPE PLAN CHECK LIST LANDSCAPE PLAN - IRRIGATION

[] Identification of water conservation design approach.

[ ] Fully automatic irrigation system.

[ ] 25% of irrigation achieved through low flow systems.

[ ] Head to head coverage where applicable.

[ ] Required retaining walls or curbs to protect irrigation devices on slopes.

[ ] Backflow Device - reference to detail, winterize, LeMeur Enclosure, Padlock.

[ ] PVC Pipe and Fittings - reference to detail, class, schedule, cover, joints, thrust blocks.

[ ] Sprinkler Heads - reference to detail, double ell swing joints, pop-ups, screw adjustment.

[ ] Bubblers - reference to detail, pressure compensating, separate valve.

[ ] Valves (electric control valves) - Rainbird EFA-CP or equal, valve boxes, reference to detail.

[ ] Valves (quick couplers) - spacing, red brass, valve boxes, reference to details.

[ ] Wiring - reference to detail, trenching location, connections, sizing, continuous runs, colors.

[ ] Automatic Controller - Rainbird ISC series or equal, LeMeur cover, location, padlocks., location on plan.

[ ] Detention/Retention Basin - separate valves, bubblers to trees on separate valves, sprinkler heads, location of heads.

[ ] Irrigation notes.

VI - 27

LANDSCAPE PLAN CHECK LIST PLANTING PLAN

[ ] Statement of design approach to water conservation.

[ ] City of Palmdale Recommended Plant List selections.

[ ] A maximum of 25% of landscaped area in turf.

Location, species, quantities and sizes of all plant material.

[ ] Trees - minimum 15 gallon size, reference details.

[ ] Trees - 20% of all trees 24" box or larger.

[ ] Street trees selected from the approved Street Tree List.

[ ] Trees - located less than 7' from adjacent property lines, 50' from beginning of curb returns on approach to an intersection, 15' from end of curb return on an exit side of curb return, 20' from lamp standards, 10' from fire hydrants and driveways, 5' from service walks, water meters and drain pipes.

[ ] Trees - minimum of 3' from back of sidewalk or 7-1/2' from back of curb face.

[ ] Shrubs - minimum of 5 gallon size, reference planting detail.

[ ] Shrubs - located a minimum of 36" from all sidewalks

[ ] Ground cover - type, spacing, reference detail.

[ ] Vines - a minimum of 5 gallon size, reference detail.

[ ] Turf - "drought tolerant" species, slope limits, provided as sod.

[ ] Hydroseed - approved seed mix and material.

VI - 28

[ ] Soil amendment.

[ ] Plant tablets.

[ ] Tree staking and guying - materials, size of material, reference detail.

[ ] Mulch.

[ ] Root Barriers - type, reference detail.

[ ] Erosion Control Matting - type, location.

[ ] Mow strips and headers - type, location, reference detail.

[ ] Arbor Guards - type, required in turf areas.

[ ] Slopes - shall not exceed 3:1, required treatment, level area at toe of slope.

[ ] Positive drainage.

[ ] Detention/retention basin - interior planting (hydroseed and trees), buffer between basin and back of sidewalk.

[ ] Planting Notes.

VI-29

LANDSCAPE PLAN CHECK LIST SLOPE EROSION CONTROL

[ ] Temporary Erosion Control - slopes greater than 3' in vertical height and steeper than 4:1.

[ ] Erosion control blankets.

[ ] Ground cover - species, spacing, reference detail

[ ] Trees and Shrubs - species, spacing, reference detail.

[ ] Irrigation - automatic, backflow device, piping, heads, reference details.

VI-30

EXHIBIT "VI - B"

LANDSCAPE MAINTENANCE ASSESSMENT DISTRICT 89-1 ASSESSMENT OF MAINTENANCE COSTS

TRACT(S) _____

LOCATION ___

LAD AREA # ___

QUANTITIES

_____ Street Trees

Electrical Meter(s)

___ Water Meter(s)

___ Landscaped Areas (sq. ft.)

___Detention Basin - include enclosure (sq. ft.)

_____ Water Usage - include calculations (gallons/year)

SECTION VII SANITARY SEWER PLANS

A. GENERAL

Sanitary Sewer Plans shall meet the criteria specified in Private Contract Sanitary Sewer Procedural Manual, latest edition, published by Los Angeles County Department of Public Works and shall also incorporate the following:

TV INSPECTION

Prior to acceptance of any sanitary sewer line by the City, said line shall be inspected internally by television as outlined below at no cost to the City.

Defects such as high and low spots, joint separations, offset joints, chipped ends, cracked or damaged pipe, infiltration points and debris in lines shall be corrected at no cost to the City.

1. The complete job is ready for television inspection when the following work has been completed:
2. a.All sewer pipelines are installed and backfilled.
3. b.All structures are in place, all channeling is complete and pipelines are accessible from structures.
4. c.All other underground facilities, utility piping and conduits are installed.
5. d.Final street subgrading is complete and ready for asphaltic concrete surfacing.
6. e.Pipelines to be inspected have been preliminarily balled, flushed and mandrel or cleaned with a high pressure cleaner.

VII-1

• f.Final air test has been completed and approved.
• When the above work is complete, the Developer shall arrange for the television inspection.
• The Developer of the project will notify the City in writing as to the scheduled date of the television inspection.
• The entire job will be initially televised and video taped. The tapes and reports shall be delivered to the City.
• The Developer will be notified in writing of any deficiencies revealed by the television inspection that will require repair. If corrective work is indicated and Developer wishes to view videotapes, he shall contact the City to set a time for viewing with the Engineer.
• Corrective work shall be done. The cost shall be borne by the Developer.
• Those portions of the pipeline system that have been corrected must be re-televised and video taped and the tapes and reports delivered to the City.
• The procedure outlined in conditions 1 through 7 above will be repeated until all deficiencies observed by television have been corrected to the complete satisfaction of the City.
• All video tapes and reports become the property of the City to be used as "As Builts" for future reference.

B. SUBMITTAL REQUIREMENTS

Sanitary Sewer plans shall be submitted as a part of the Street Improvement plan submittal package. (See Page IV-4)

See Page VII-3 for plan checking and submittal requirements.

VII-2

SEWER IMPROVEMENT PLAN CHECKLIST COVER SHEET

*Requires Special Attention by Checker

[ ] Refer to "Private Contract" Sanitary Sewer Plans" Manual by L.A. County.

[ ] Refer to "Standard Drawings for Construction" by L.A. County Sanitation District.

[ ] Benchmark - County of Los Angeles, Palmdale Quad, elevation location, BM#, description, adjustment date.

[ ] Title area - Tract number, Palmdale number, page number, number of sheets and pages, date, signature and stamp of Engineer, legend of standard plans, City Engineer's signature block, County Sanitation District signature block, Tract number and PC number on right border. Scale 1" = 40'Horz., 1" = 4'Vert.

[ ] *Index Map - Scale: 1" = 600', PC number, Tract number, City limit lines if applicable, tract boundary, location of sewer lines with page references, surrounding tracts, major/secondary highways, railroad tracts, existing sewer lines with size and owner (LA County Sanitation District Trunk Sewer, etc.)

[ ] *General Notes - to include General Notes as listed on pages VII-12 and VII-13 (City Design Manual).

[] *Construction Notes - to include all Construction Notes as listed on pages VII-14 and VII-15 (City Design Manual).

[ ] Private Engineer's Notice to Contractors.

[ ] *Miscellaneous Notes - to include all applicable Notes on page VII-16 (City Design Manual).

[ ] Underground Alert Notice.

[ ] Private Engineer's Statement of Responsibility.

VII-3

[ ] When crossing a railroad, a maintenance agreement between the City and the railroad company is required prior to plan approval.

[ ] *Need applicable statements.

[ ] Collect charges as indicated - Use when charges are indicated on plan or profile.

[ ] Double vertical scale - Use when scale on profile is changed to 1" = 8'.

[ ] See County Sanitation District for special connection charges - Use in cases as defined by Los Angeles County Sanitation District.

[ ] No charges for connection - Use when no fee is necessary or that fees were paid as part of another project.

[ ] Collect ordinance frontage charges - Use when a fee is necessary to lateral a new user to an existing sewer main line that the user didn't participate in constructing.

[ ] Issue no permits, street must be double lined - Use when a main sewer line is required on both sides of street and only one is available.

The following signature block is to be shown on page one of the plans:

COUNTY OF LOS ANGELES DEPARTMENT OF PUBLIC WORKS CONSOLIDATED SEWER MAINTENANCE DISTRICT REVIEWED FOR MAINTENANCE

REVIEWED BY_____ DATE_____

APPROVED: COUNTY SANITATION DISTRICT NO. OF LOS ANGELES COUNTY

JAMES F. STAHL - CHIEF ENGINEER AND GENERAL MANAGER

BY:___ Date:___

OFFICE ENGINEER

VII-4

SEWER IMPROVEMENT PLAN CHECKLIST PLAN AND PROFILE SHEET

PLAN VIEW: lprime = 40prime

[ ] North arrow (to top or right), plan must be drawn accurately to scale.

[ ] *Existing improvements and utilities shown dashed, limits of construction for existing and new.

[ ] Street names, street widths with street dimensions and main sewer and water location with reference to street centerline.

[] Stationing of at least one lot line per block each side of street.

[ ] Tract boundary, tract number, lot lines and numbers, adjacent tract or parcel numbers

[ ] *Pad elevations and lot numbers.

[] *Stationing of main sewer lines. Low points will be start of stationing and increase with rise of main sewer line. At junction of independently stationed main sewer lines, an equation shall be used to show relation.

[ ] *Locations of water lines to be per latest design of water plans.

[ ] *Invert elevations of utility crossings.

[ ] Lot dimensions and length of curve on curb return.

[ ] *As-Built stationing of existing main sewer lines, continue to use as-built stationing, if practical.

[ ] *Reference PC numbers for existing main sewer lines and Sanitation District designation for trunk sewer lines.

VII-5

[ ] Call LA County Sanitation District for methods of joining trunk sewer lines.

[ ] Center plan under profile.

[ ] Ink all house laterals and wyes on back of sheet. All H.L. to be constructed to R/W line if main line is more than 5 feet from R/W.

[] *Station normal house laterals with respect to connection at main line sewer and at end (at R/W) with respect to main line sewer.

[ ] *Design engineer must consult with railroad company for design requirements and permits when a sewer passes under RR tracks. Steel jacking is required per STD. S-37.

[ ] Four-inch house laterals may be used in single family subdivisions. Six-inch house laterals to be used in all other cases.

[ ] Dash facilities when shown elsewhere on plans.

VII-6

PROFILE

[ ] *Note scale, if different than 1" = 4'.

[ ] Stationing (every 100') and elevation (every 5') of grid.

[ ] T.C. grade each side and/or surface over sewer when applicable.

[ ] Open circle at grade breaks (-0-).

[ ] Station and elevation at surface for grade breaks, intersections, change in conditions.

[ ] Identical points flagged as such.

[] *Where clearance (from sewer to object) is .5 feet to 1.5 feet, encase per STD. S-23. Where clearance is less than .5 feet, use Ductile iron pipe.

[] *Chimneys are required where depth of main line sewer is 15 feet or more.

[ ] Cradling or encasement is required where depth of main line sewer is 20 feet or more.

[ ] 0.75 feet between outlet elevation and the bottom (base) of MH structure.

[ ] Sewer grades should be in multiples of 0.40% if practical.

[ ] Use lettered section designations only when two or more sections appear on one page.

[ ] Lower manhole on each view to be shown dashed if shown solid on any other view.

[ ] *Backwater valves are required when pads serviced by a main sewer line are lower in elevation than the next upstream MH.

[ ] Avoid use of vertical curves. Minimum length of vertical curve shall be 40 feet. Elevation and station to be shown every 10 feet

[ ] House laterals to be constructed with 1/4" per foot rise to the R/W line.

VII-7

[ ] *Label and flag up (45 degrees) all inlets and outlets unless the required drop is centerline.

[] *Main sewer line or house laterals must be encased where less than four feet of cover to subbase in street is available. Ink on back of sheet.

[ ] In local streets, main line sewers should be located 5 feet northerly or easterly of the street centerline.

[ ] Minimum distance between center of manhole and curb line is 6 feet.

[ ] City boundary line to be shown as dash-double dot lines. ___

[ ] *Maximum manhole distance to be 350 feet.

[] * Horizontal curve table with delta, radius, length of curve, and tangent consecutively labeled. Horizontal curve data shall be identified by a number in a circle and shall be consistent throughout the set of plans. Only one curve of any kind allowed between manholes. Minimum radius for 8" sewer is 150 feet. Maximum delta is 60 degrees.

[ ] Call out curb lines, utilities and substructures, street centerline, H.L., wyes, encasements, cradles, chimneys, shallow manholes, stubs, plugs, BC and EC, easements, future construction, identical points, direction of flow, size of sewers, R/W.

[ ] Call out page references to match lines.

[ ] *Elevation of MH tops required in areas of new paving. MH tops in existing paving to meet grade. MH tops in undeveloped areas to be 6" above grade.

[ ] *For required drops through manholes see STD. S-C5.

[ ] For main line sewers with less than 7 feet of cover, coordinate with Sewer Maintenance.

[ ] *Review comments from Sewer Maintenance required for thorough check.

VII-8

SEWER IMPROVEMENT PLANS

CITY OF PALMDALE 38250 Sierra Highway Palmdale, California 93550 (661) 267-5272

Parcel/Tract _____ Palmdale P.C. _____

Engineer ___ Telephone ___

Palmdale P.C.

Telephone ___

Please make the corrections shown on the attached check prints and return the following circled items.

1. CORRECTION (REDLINE) PRINTS AND TWO FOLDED SETS OF CORRECTED PRINTS.
2. COPY OF FIELD NOTES showing: Existing manhole ties, invert elevations, surface over sewer and topography.
3. PROVIDE SANITARY SEWER AREA DESIGN CALCS. With engineers seal and signature.
4. UNDERGROUND LETTER: Complete, sign, seal and return (Contacting utility companies by phone is okay).
5. PARTICIPATION LETTER: Complete and return. (The description of the property should be as simple as possible, for example: "Tract 40000.")
6. SUBMIT ORIGINAL MYLAR AND ONE SET OF CORRECTED PRINTS, after bonds have been posted.
7. A COMPLETE SET OF TRACT WATER PLANS.
8. PROVIDE PROOF OF RECORDED EASEMENT FOR SANITARY SEWERS, as shown on plan, page ___.
9. SEWER MAINTENANCE REVIEW AND FEE AMOUNT. Contact Norman Cortez at (626) 300 3388. Copy of receipt required.
10. 8 1/2' x 11" VELLUM OF INDEX MAP. Scale 1" = 600'. 1st 2nd 3rd check _____ _____

By

Date

PLAN CHECK REMARKS:

<table><tr><td></td></tr><tr><td></td></tr><tr><td></td></tr></table>

VII-9

PARTICIPATION LETTER

CITY OF PALMDALE

DATE ___

CITY ENGINEER

PALMDALE PRIVATE CONTRACT ___

TRACT NO. ___

Dear Sir:

The following is a full and complete list of all abutting properties which have contributed to the cost of construction of the sewer system constructed under Palmdale Private Contract No. ___.

(Notarization not required)

<div style="text-align: center;"><img src="imgs/img_in_image_box_1_1_33_640.jpg" alt="Image" width="41%" /></div> <div style="text-align: center;"><img src="imgs/img_in_image_box_13_0_46_668.jpg" alt="Image" width="42%" /></div>

Owners Signature

NOTE: Properties connecting to public sewers constructed at no cost to the abutting property may be made subject to charges as prescribed by Section 5204, 5204.1 and 5204.2 of Ordinance 6130 as amended.

VII - 10

UNDERGROUND LETTER

CITY OF PALMDALE PALMDALE PRIVATE CONTRACT NO. _____

PALMDALE PRIVATE CONTRACT NO.

SEWERS IN _____ VICINITY OF _____

Dear Sir:

I have made a search of the available records as well as a physical inspection of the site and all water wells found within 200 feet of the sewers, if any, are shown on the plans.

In compliance with Section 5615 of Ordinance 6130, I have checked and determined from the following utility or other companies having substructures in the affected area that the location and size of such structures, as shown on the submitted plans, are the same as shown upon such company's record and to the best of my knowledge there is no interference with the proposed sewers.

Antelope Valley Cablevision

Water District

Southern California Gas Company.

Telephone Company

Southern California Edison Company

Los Angeles County Waterworks District No. 4

R.C.E. No. ___

VII-11

GENERAL NOTES

1. ELEVATIONS ARE TO FEET ABOVE U.S.C. & G.S. SEA LEVEL DATUM OF 1929, USING ADJUSTMENT SHOWN.
2. NO REVISIONS SHALL BE MADE TO THESE PLANS WITHOUT THE APPROVAL OF THE CITY ENGINEER.
3. NO REPRESENTATIVE OF THE CITY ENGINEER WILL SURVEY OR LAY OUT ANY PORTION OF THE WORK.
4. GRADES TO WHICH THIS SEWER IS TO BE CONSTRUCTED ARE SHOWN ON PLANS AND PROFILES. GRADE POINTS FOR TOP OF CURBS, CENTERLINE OF STREETS, OR CENTERLINE OF ALLEYS ARE SHOWN BY CIRCLES ON PROFILES. AT ALL POINTS BETWEEN DESIGNATED POINTS THE GRADE SHALL BE ESTABLISHED SO AS TO CONFORM TO A STRAIGHT LINE DRAWN BETWEEN SAID DESIGNATED POINTS.
5. THE PRIVATE ENGINEER SHALL FURNISH THE CITY ENGINEER WITH GRADE SHEETS AND STATIONING FOR ALL HOUSE LATERALS AND "Y" OR "T" BRANCHES AND SHALL PROVIDE STAKES FOR THEM AT THEIR PROPER LOCATIONS WITH STATIONING PLAINLY MARKED. ALL HOUSE LATERALS SHALL BE CONSTRUCTED IN A STRAIGHT ALIGNMENT AT RIGHT ANGLES FROM THE MAIN LINE SEWER EXCEPT AS SHOWN ON THE PLANS. HOUSE LATERALS FROM CHIMNEYS SHALL NOT HAVE AN ANGLE OF LESS THAN 45circ WITH THE MAIN LINE SEWER. ANY CHANGE IN ALIGNMENT SHALL BE REQUESTED IN WRITING BY THE PRIVATE ENGINEER.
6. THE PRIVATE ENGINEER SHALL FURNISH THE HOUSE LATERAL DEPTH AT THE PROPERTY LINE BELOW THE TOP OF CURB ELEVATION FOR EACH HOUSE LATERAL ON THE GRADE SHEET.
7. BEFORE WORK CAN BE STARTED, THE CONTRACTOR MUST OBTAIN A PERMIT TO EXCAVATE IN CITY STREETS FROM THE CITY ENGINEER, 38250 SIERRA HIGHWAY, AND PAY A FEE TO THE CITY OF PALMDALE TO COVER THE COST OF CONSTRUCTION INSPECTION AND RECORD PLANS.
8. APPROVAL OF THIS PLAN BY THE CITY ENGINEER DOES NOT CONSTITUTE A REPRESENTATION AS TO THE ACCURACY OF THE LOCATION OR THE EXISTENCE OF ANY UNDERGROUND UTILITY PIPE OR STRUCTURE WITHIN THE LIMITS OF THIS PROJECT. THIS NOTE APPLIES TO ALL PAGES.
9. REFER TO SECTION 7.10.4.1 OF THE STANDARD SPECIFICATIONS FOR PUBLIC WORKS CONSTRUCTION, REGARDING SAFETY ORDERS.
10. PRIOR TO THE ISSUANCE OF THE REQUIRED SEWER CONSTRUCTION PERMIT, THE CONTRACTOR SHALL OBTAIN, AND FILE WITH THE CITY ENGINEER, A COPY OF A PERMIT FOR EXCAVATIONS AND TRENCHES FROM THE STATE OF CALIFORNIA, DIVISION OF INDUSTRIAL SAFETY, AND A CERTIFICATE OF WORKER'S COMPENSATION INSURANCE WITH THE CITY OF PALMDALE NAMED AS CERTIFICATE HOLDER, TO BE NOTIFIED 30 DAYS PRIOR TO CANCELLATION OF POLICY.

VII - 12

11. IF WORK IS TO BE DONE ON A STATE HIGHWAY, A PERMIT MUST BE OBTAINED FROM THE STATE OF CALIFORNIA, DIVISION OF HIGHWAYS, 120 SOUTH SPRING STREET, LOS ANGELES, CA.
12. THE PRIVATE ENGINEER SIGNING THESE PLANS IS RESPONSIBLE FOR THE ACCURACY AND ACCEPTABILITY OF THE WORK HEREON. IN THE EVENT OF DISCREPENCIES ARISING DURING CONSTRUCTION, THE PRIVATE ENGINEER SHALL BE RESPONSIBLE FOR DETERMINING AN ACCEPTABLE SOLUTION AND REVISING THE PLANS FOR APPROVAL BY THE CITY ENGINEER.
13. NO CONNECTION FOR THE DISPOSAL OF INDUSTRIAL WASTES SHALL BE MADE TO SEWERS SHOWN ON THESE PLANS UNTIL A PERMIT FOR INDUSTRIAL WASTEWATER DISCHARGE HAS BEEN ISSUED BY THE COUNTY SANITATION DISTRICT OF LOS ANGELES COUNTY.
14. BEFORE BREAKING INTO OR CONSTRUCTION ON A SANITATION DISTRICT OWNED SEWER, AND PRIOR TO FINAL ACCEPTANCE OF THE SEWER, THE SANITATION DISTRICT SHALL BE NOTIFIED BY TELEPHONE (661) 947-5027 SO THAT THE REQUIRED INSPECTIONS CAN BE MADE.
15. ALL SANITARY SEWERS MAY REQUIRE VIDEOTAPING PRIOR TO THE FINAL ACCEPTANCE FOR MAINTENANCE, AS DETERMINED BY THE CITY INSPECTOR.
16. THE PRIVATE ENGINEER SHALL BE REQUIRED TO PROVIDE AS-BUILT SEWER PLANS TO THE CITY ENGINEER PRIOR TO THE ISSUANCE OF A CERTIFICATE OF OCCUPANCY.
17. THE SANITARY SEWER SHOWN ON THESE PLANS WILL NOT BE ACCEPTED FOR MAINTENANCE UNTIL SUCH TIME AS THE OUTLET SEWER (PC___) HAS BEEN CONSTRUCTED AND ACCEPTED FOR MAINTENANCE BY THE CITY OF PALMDALE.
18. IMPORTANT NOTICE - SECTION 4216/4217 OF THE GOVERNMENT CODE REQUIRES A DIG ALERT IDENTIFICATION NUMBER BE ISSUED BEFORE A "PERMIT TO EXCAVATE" WILL BE VALID. FOR YOUR DIG ALERT I.D. NUMBER, CALL UNDERGROUND SERVICE ALERT TOLL FREE @ 1-800-422-4133, TWO WORKING DAYS BEFORE YOU DIG.

VII - 13

CONSTRUCTION NOTES

1. WORK SHALL BE PERFORMED ACCORDING TO THE LATEST EDITIONS OF THE STANDARD SPECIFICATIONS FOR PUBLIC WORKS CONSTRUCTION AND THE SPECIAL PROVISIONS FOR THE CONSTRUCTION OF SANITARY SEWERS (SUPPLEMENT TO THE STANDARD SPECIFICATIONS) AND SHALL BE COMPLETED ONLY IN THE PRESENCE OF THE CITY ENGINEER OR THE CITY ENGINEER'S REPRESENTATIVE. ALL REFERENCES TO STANDARD SPECIFICATIONS AND SPECIAL PROVISIONS MADE HEREON SHALL BE TO THESE EDITIONS. OTHER REFERENCES MADE HEREON ARE TO THE LATEST EDITIONS OF APWA STANDARD PLANS FOR PUBLIC WORKS CONSTRUCTION, LOS ANGELES COUNTY DEPARTMENT OF PUBLIC WORKS STANDARD PLANS, AND THE STANDARD DRAWINGS OF THE CITY OF PALMDALE ENGINEERING DESIGN STANDARDS.
2. THE CONTRACTOR SHALL NOTIFY THE CITY OF PALMDALE BY TELEPHONE (661) 267-5255 AT LEAST TWENTY-FOUR HOURS BEFORE STARTING ANY WORK UNDER THIS CONTRACT.
3. HOUSE LATERALS TO BE CONSTRUCTED WITH INVERTS AT PROPERTY LINE 6 FEET BELOW CURB GRADE EXCEPT AS NOTED.
4. WYE OR TEE BRANCHES MAY BE USED FOR CONNECTIONS TO MAINLINE SEWERS, EXCEPT AS NOTED.
5. ALL STRUCTURES SHALL BE EITHER BRICK SEWER MANHOLES PER APWA STANDARD PLAN 203-0 OR PRECAST CONCRETE SEWER MANHOLES PER APWA STANDARD PLAN 200-2, EXCEPT AS NOTED.
6. PROVIDE STAKES ON THE PROPERTY LINE OR PROPERTY LINES PRODUCED AT RIGHT ANGLES TO THE SEWER LINE AT THE CENTERLINE OF EACH MANHOLE.
7. VITRIFIED CLAY PIPE JOINTS SHALL BE TYPE "G" PER STANDARD SPECIFICATIONS SECTION 208-2 OF THE STANDARD SPECIFICATIONS FOR PUBLIC WORKS CONSTRUCTION.
8. ALL JOINTS BETWEEN DUCTILE IRON PIPE AND VITRIFIED CLAY PIPE SHALL BE MADE WITH A RUBBER SLEEVE JOINT, TYPE "C" OR "D", (WITH BUSHING IF NECESSARY) PER SECTION 208-2 OF THE STANDARD SPECIFICATIONS FOR PUBLIC WORKS CONSTRUCTION.
9. SEWERS TO BE TESTED FOR LEAKAGE PER SECTION 306-1.4 OF THE STANDARD SPECIFICATIONS FOR PUBLIC WORKS CONSTRUCTION.
10. BEDDING MATERIAL SHALL BE IN ACCORDANCE WITH LA COUNTY STANDARD PLANS 2021-0 AND 3080-1, AND SHALL BE IN FULL COMPLIANCE WITH SECTION 306-1.2.1 OF THE STANDARD SPECIFICATIONS FOR PUBLIC WORKS CONSTRUCTION. CONCRETE ENCASEMENT PER LA COUNTY STANDARD PLAN 2023-1, CASE II, SHALL BE REQUIRED WHEN THE SEWER HAS LESS THAN FOUR FEET OF COVER, AND CONCRETE ENCASEMENT, CASE IV, AND CONCRETE BACKFILL PER LA COUNTY STANDARD PLAN 3080-1, SHALL BE REQUIRED WHEN THE SEWER HAS LESS THAN ONE AND ONE HALF FEET OF COVER. IN NO CASE SHALL SEWER HAVE LESS THAN ONE FOOT OF COVER.

VII-14

11. SEWER TRENCH BACKFILL AND REPAIR CRITERIA:

FOR TRENCHES OUTSIDE OF EXISTING OR FUTURE RIGHT-OF-WAY

• A.BACKFILL TRENCH, PER STANDARD SPECIFICATIONS SECTION 306-1.3, AND REPLACE OTHER EARTH REMOVED SO AS TO ACHIEVE THE NATURAL OR FINISH GRADES AND SLOPES REQUIRED AND APPROVED FOR THIS PROJECT BY THE CITY ENGINEER.
• B.ALL BACKFILL EARTH REPLACED SHALL BE COMPACTED TO A MIN. OF 90% OF MAXIMUM DENSITY PER ASTM D 698-57T, AS MODIFIED. ACCEPTABLE CERTIFICATION OF COMPACTION SHALL BE SUBMITTED TO THE CITY ENGINEER, PRIOR TO THE ISSUANCE OF A CERTIFICATE OF PARTIAL ACCEPTANCE.

FOR TRENCHES WITHIN EXISTING OR FUTURE RIGHT-OF-WAY

• A.BACKFILL TRENCH AND REPAIR PAVEMENT PER STANDARD SPECIFICATIONS SPECTION 306-1.3 AND CITY OF PALMDALE STANDARD NO. M-6.1 AND M-6.2, AS APPLICABLE, WITHIN CITY OF PALMDALE JURISDICTION SO AS TO ACHIEVE THE EXISTING OR PROPOSED GRADES REQUIRED AND APPROVED FOR THIS PROJECT BY THE CITY ENGINEER.
• B.WITHIN STATE HIGHWAY OR RAILROAD JURISDICTION, BACKFILL TRENCH AND REPAIR PAVEMENT IN ACCORDANCE WITH REQUIREMENTS OF THE PERMITS AND PER LA COUNTY STANDARD PLAN 3081-0 (FOR STATE HIGHWAY).
• ALL WYES AND/OR HOUSE LATERAL SEWERS ARE TO BE LOCATED AT LEAST FIVE FEET APART AND NOT CLOSER THAN FIVE FEET TO ANY MANHOLE.
• ALL SADDLE CONNECTIONS TO CITY OWNED MAINLINE SEWER ARE TO BE PERFORMED BY LA COUNTY DEPARTMENT OF PUBLIC WORKS SEWER MAINTENANCE UNLESS SAID DEPARTMENT HAS APPROVED SAID CONNECTIONS TO BE PERFORMED BY CONTRACTOR. CONTRACTOR SHALL NOTIFY SEWER MAINTENANCE 48 HOURS PRIOR TO REQUIRING CONNECTIONS.
• IF DURING THE COURSE OF CONSTRUCTION IT IS DETERMINED, AND IS NOT ADDRESSED BY THE PLANS, THAT THERE IS LESS THAN FOUR FEET OF COVER OVER THE TOP OF A MAIN LINE OR HOUSE LATERAL SEWER, OR A POWER POLE IS WITHIN THREE FEET, THE PIPE SHALL BE ENCASED PER LA COUNTY STANDARD PLAN 2023-1, CASE II, UNLESS OTHERWISE APPROVED BY THE CITY ENGINEER.

VII - 15

PRIVATE ENGINEER'S NOTICE TO CONTRACTORS

The existence and location of any underground utility pipes or structures shown on these plans are obtained by a search of available records. To the best of our knowledge there are no existing utilities except as shown on this plan. The Contractor is required to take due precautionary measures to protect the utility lines and any other lines not shown on this plan. Prior to excavation, the Contractor shall call 1-800-422-4144 for the underground location of utility lines. The contractor shall also call the applicable utility companies to verify the locations.

VII - 16

SECTION VIII

WATER PLANS

A. GENERAL

Water Distribution System Plans shall meet the criteria of the water district having jurisdiction.

B. SUBMITTAL

Plans shall be submitted directly to the water district having jurisdiction. Quantities and supporting data shall be as specified by the water district.

VIII - 1

SECTION IX SIREET LIGHTING PLANS

A. GENERAL

Street Lighting Plans shall meet the criteria of Los Angeles County Department of Public Works, Traffic and Lighting Division.

B. SUBMITTAL REQUIREMENTS

Street lighting plans shall be submitted directly to the County of Los Angeles Department of Public Works, Traffic and Lighting Division, 900 S. Fremont Street, Alhambra, CA. Contents of submittal package shall be as required by L. A. County Department of Public Works.

IX-1

SECTION X STANDARD DRAWINGS

Standard No. Description

C-1 Residential Driveway

C-2 industrial & Commercial Driveway

C-3.1 Residential Driveway

C-3.2 Industrial & Commercial Driveway

C-4 Sidewalk Landing Detail - Local Intersections

C-5 Sidewalk Landing Detail -Highway Intersections

C-6 Sidewalk Encroachments

C-7 Wheelchair Ramp Detail

C-8 Alley Intersection Detail

D-1.1 Park-way Drywell, Inlet Details

D-1.2 Park-way Drywell, Interceptor & Drywell Details

D-1.3 Parkway Drywell, Gutter Drain

D-1.4 Parkway Drywell, Gutter Drain installation

D-2 Under Sidewalk Drains

D-3 Detention Basin Outlet Structure

D-4 Anti-Seep Collar

D-5 Basin Spillway

D-6 Concrete Encasement

D-7 Basin Notes

D-8 Modified LACRD Standard 04-02

G-1.1 Residential cul-de-sac, 58' Street

G-1.2 Residential cul-de-sac, 60' Street

G-2 Commercial cul-de-sac

G-4 Curb Return Grade Calculation

I-1 Automatic Controller (Outdoors)

I-2 Electric Meter Pedestal

I-3 Remote Control Valve (Straight Type)

I-4 Remote Control Valve (Angle

I-5 Quick Coupling Valve

X-1

I-6 Gate Valve (3" and Smaller) I-7 Backflow Preventor - Inside Enclosure I-8 Tree Well Bubbler I-9 Shrub Head Assembly I-10 12" Pop-up Shrub Head (Side Gated) I-11 12" Pop-up Shrub Head (Bottom Fed) I-12 Lawn Head Assembly I-13 Lawn Rotor Head (Large) I-14 General Ditching I-15 Air and Pressure Relief Valve I-16 Automatic Controller (Indoors) M-1 Barricade - Type III M-3.1 6' Reinforced Concrete Blockwall M-3.2 Blockwall Detail (Cantilever) M-4 Drainage Basin Fencing & Gate M-5.1 Standard street Name Sign, Type A Bracket M-5.2 Standard street Name Sign, Block Number Plate M-5.3 Standard Street Name Sign, Specifications, M-6.1 Backfill and A. C. Repair for Trenches Across Street M-6.2 Backfill and A. C. Repair for Trenches Along Street M-7.1 Sample Title Sheet, Dimensions and Sizes M-7.2 Sample Title Sheet, Legend M-8.1 Symbols and Abbreviations, Sheet 1 M-8.2 (VACANT) Symbols and Abbreviations, Sheet 3 P-1.1 Approved Plant Material - Tree List P-1.2 Approved Plant material - Street Tree List P-2.1 Approved Plant Material - Hardy Large Shrubs P-2.2 Approved Plant Material - Hardy Small Shrubs P-3 Approved plant Material - Hardy Perennials and Sub Shrubs for Color Accents P-4 Approved plant Material - Hardy Ground Covers P-5 Approved Plant Material - Hardy Vines

P-6 Approved Plant Material - Desert Plants

X-2

Standard No. Description

X-3

7

30001

3-89 01.

D07

C�Ennoor

9-A

5-000.0.1

NOTES:

1. This Right-Of-Way Configuration Is To Be Used On All Intersections Where One Of The Streets Has A Right-Of-Way Width Of 80 Feet Or More, And At Other Locations As Required By The City Engineer.
2. Greater Sidewalk Width May Be Required in Commercial Areas.

CITY OF PALMDALE...

Std. No. C-5

REV. 3/99

3-89001

NOTES:

1. INSIDE EDGE OF FOUR (4) FOOT RAMPS SHALL BE LOCATED AT THE CURB RETURNS.
2. RAMP SIDE SLOPE VARIES UNIFORMLY FROM A MAXIMUM OF 1:12 AT CURB TO CONFORM WITH LONGITUDINAL SIDEWALK SLOPE ADJACENT TO THE TOP OF THE RAMP.
3. FOR GROOVE AND LIP DETAIL SEE SHEET 6.

SECTION "B-B"

RAMP DETAIL

NOT TO SCALE

CITY OF PALMDALE DEPARTMENT OF PUBLIC WORKS

CURB RAMP—CASE A: NEW CONSTRUCTION FOR MAJOR, SECONDARY, AND LOCAL STREETS STANDARD PLAN

C-7

APPROVED CITY ENGINEER 9-14-95

SHEET 1 OF 6

SECTION "A-A"

SECTION "B-B"

NOTES:

1. FOR GROOVE AND LIP DETAIL SEE SHEET 6.

RAMP DIMENSIONS

RAMP DETAIL

NOT TO SCALE

CITY OF PALMDALE DEPARTMENT OF PUBLIC WORKS

CURB RAMP-CASE B: T-INTERSECTION WHERE CROSS WALK IS ALLOWED (ie. SCHOOL) STANDARD PLAN

APPROVED CITY ENGINEER DATE SHEET 2 OF 6

SECTION "A-A"

DEPRESSION DETAIL AT C.F.

NOTES:

1. WHEELCHAIR RAMP SHALL BE LOCATED AT THE MIDPOINT OF THE CURB RETURN.
2. RAMP SIDE SLOPE VARIES UNIFORMLY FROM A MAXIMUM OF 1:10 AT CURB TO CONFORM WITH LONGITUDINAL SIDEWALK SLOPE ADJACENT TO THE TOP OF THE RAMP.
3. FOR GROOVE AND LIP DETAIL SEE SHEET 6.
2. RAMP SIDE SLOPE VARIES UNIFORMLY FROM A MAXIMUM OF 1:10 AT CURB TO CONFORM WITH LONGITUDINAL SIDEWALK SLOPE ADJACENT TO THE TOP OF THE RAMP.

3. FOR GROOVE AND LIP DETAIL SEE SHEET 6.

RAMP DETAIL

RAMP DIMENSIONS

NOT TO SCALE

CITY OF PALMDALE DEPARTMENT OF PUBLIC WORKS
CURB RAMP—CASE D—1: NEW CONSTRUCTION FOR LOCAL STREETS	STANDARD PLAN
APPROVED
CITY/ENGINEER	SHEET 3 OF 6

SECTION "A-A"

NOTES:

1. WHEELCHAIR RAMP SHALL BE LOCATED AT THE MIDPOINT OF THE CURB RETURN.
2. RAMP SIDE SLOPE VARIES UNIFORMLY FROM A MAXIMUM OF 1:12 AT CURB TO CONFORM WITH LONGITUDINAL SIDEWALK SLOPE ADJACENT TO THE TOP OF THE RAMP.
3. FOR GROOVE AND LIP DETAIL SEE SHEET 6.
2. RAMP SIDE SLOPE VARIES UNIFORMLY FROM A MAXIMUM OF 1:12 AT CURB TO CONFORM WITH LONGITUDINAL SIDEWALK SLOPE ADJACENT TO THE TOP OF THE RAMP.

SECTION "B-B"

3. FOR GROOVE AND LIP DETAIL SEE SHEET 6.

RAMP DIMENSIONS	RAMP DETAIL
NOT TO SCALE
CITY OF PALMDALE DEPARTMENT OF PUBLIC WORKS
CURB RAMP-CASE D-2: EXISTING LOCAL INTERSECTION	STANDARD PLAN
APPROVED		C-7 SHEET 4 OF 6

GROOVING DETAIL

LIP DETAIL

GENERAL NOTES:

1. RAMPS SHALL HAVE A 12" BORDER ALONG PLATFORM. SEE GROOVING DETAIL FOR SPACING. THE SURFACE OF THE RAMP SHALL HAVE A TRANSVERSE BROOMED SURFACE TEXTURE ROUGHER THAN THE SURROUNDING SIDEWALK.
2. RAMPS SHALL BE CONSTRUCTED OF CLASS 520-C-2500 PORTLAND CEMENT CONCRETE, FOUR (4) INCHES THICK.
3. MINIMUM WALKWAY WIDTH = 36"

NOT TO SCALE

CITY OF PALMDALE DEPARTMENT OF PUBLIC WORKS

CURB RAMP-DETAIL SHEET STANDARD PLAN

APPROVED C-7

C:D ENGINEER 9-14-95

DATE

3-89 0.3.1.

FARSIDE INLET NT.8.

3-89 dsl.

N.T.S.

CITY OF PALMDALE...

DRYWELL GUTTER DRAIN Std. No.

Approved_City/Engineer D-1.4

MA.T. G-92

NOTIS

1. Owner Shall be Responsible for Cleaning and Maintaining Pipe.
2. Minimum Cross-slope to be 1% for Grain Pipe.
3. Place 4 x 4 Wire Mesh full Length 24° on Each Side of Pipe.
4. Under Sidewalk Drains to be Used Only by Approval of City Engineer Where a Stone Drain Does Not Exist or Extension of an Existing Storm Drain is Impractical.

CITY OF PALMDALE...

Std. No. D-2

Under Sidewalk Drains

Approved City Number 1-9-91

1-6-9

Cily Emgster

二、09 t.11.

1. SIDES AND BOTTOM OF COLLAR SHALL BE PLACED AGAINST UNDISTURBED SOIL OR COMPACTED FILL.
2. ANTI-SEEP COLLAR SHALL EXTEND AT LEAST 12° INTO UNDISTURBED SOIL.

CITY OF PALMDALE...

ANTI-SEEP COLLAR Std. No.

Approved City Engineer D-4

TYPICAL SECTION

GENERAL NOTES:

PLAN VIEW

1. EXTEND BOTH ENDS OF ENCASEMENT TO A POINT ONE INCH SHORT OF FIRST PIPE JOINT BEYOND LOCATIONS SPECIFIED ON PLAN.
2. APPLY FORM OIL, THIN PLASTIC SHEET, OR OTHER ACCEPTABLE MATERIAL TO PIPE, TO PREVENT BOND BETWEEN PIPE AND CONCRETE.
3. USE CLASS 470-C-2500 CONCRETE
4. PLACE PCC AGAINST UNDISTURBED EARTH OR COMPACTED FILL

CITY OF PALMDALE...

CONCRETE ENCASEMENT Std. No.

Approved City Engineer 12-14-92 D-6

DETENTION/RETENTION BASIN NOTES

All grading, trenching and backfill shall be considered "Engineered Grading" and shall conform with the requirements of Chapter 70 of the City of Palmdale Building Code and the following. Reports as specified in Section 7021 shall be filed with the City Engineer.

A. SITE PREPARATION

1. The embankment foundation area and reservoir area shall be cleared of all trees, stumps, roots, brush, boulders, sod, and debris.
2. All topsoil containing excessive amounts of organic matter shall be removed.
3. The foundation for the embankment shall be scarified and approved by the geotechnical engineer and city inspector prior to placement of fill. Loose foundation soils shall be removed to firm soil and recompacted to 90% relative compaction.

B. EMBANKMENT

1. The embankment material shall be approved by the geotechnical engineer prior to construction of embankment.
2. The material shall be free of all sod, roots, woody vegetation, large rock (exceeding 12 inches in diameter), and other debris.
3. Placement of fill material shall be started at the. lowest point of the foundation and shall be placed in 6-inch maximum lifts which are to be continuous over the entire length of the fill and approximately horizontal. Embankment shall be compacted to 90% relative compaction as per ASTM D-1557.
4. CITY OF PALMDALE...

BASIN NOTES Std. No.

Approved City Founded Date D-7.1

• DETENTION/RETENTION BASIN NOTES (continued)
• Slopes within the basin and slopes outside the landscape maintenance assessment district may be as steep as 2:1 at the discretion of the City Engineer.
• Pipe shall be encased per STD Plan D-6.
• Trench backfill (including irrigation line trenches) shall be compacted to 90% relative compaction and certified by the soils engineer. Alternatively, trenches may be backfilled with a sand-cement slurry (2 sack mix) or Portland Cement Concrete, upon the recommendation of the geotechnical consultant. Inspection of this operation by the geotechnical consultant and the city inspector is required.
• Soils engineer shall verify and approve trench bottom soil prior to placement of pipe.
• C.OUTLET STRUCTURES
• The drain pipe encasement shall be placed on a firm foundation approved by the soils engineer.
• Anti-seep collars are required at 15' intervals for pipe under the embankment, with a minimum of one required in addition to the inlet and outlet erosion protection.
• Discharge shall be to a paved street, channel, or an approved drainage course with grouted riprap. Ripap shall be 12" minimum size rock. Ripap shall be embedded in a minimum 6" into grout.
• The drain pipe shall be a minimum of 15" in diameter and shall be constructed with water tight joints.
• All concrete shall be Portland Cement Concrete 420-C-2000 unless otherwise specified.
• CITY OF PALMDALE...

BASIN NOTES Std. No.

Approved City Engineer Date D-7.2

• DETENTION/RETENTION BASIN NOTES (continued)
• D.EMERGENCY SPILLWAY
• The spillway shall be lined with a minimum of 4-inch thick concrete, reinforced with 6" × 6" × 10/10 welded wire mesh. The concrete must extend a minimum of 3 feet down the upstream face of the embankment.
• Spillway and outlet structures may be combined into a single structure, but the low-flow outlet capability must be retained, if required by the City Engineer. Details must be included on grading plans.
• Spillway may be combined with access driveway, if approved by the City Engineer. Details must be included on grading plans.
• E.EROSION CONTROL
• Except for bottom and concrete areas, all interior surfaces of the basin shall be prepared and hydroseeded as required by the City Landscape Architect.
• There shall be no permanent landscape irrigation system inside the basin.
• CITY OF PALMDALE...

BASIN NOTES Std. No.

Approved City Engineer D-7.3

COMMON WIRE TO BE WHITE AND CONTROL WIRE TO BE BLACK IN COLOR UNLESS OTHERWISE NOTED.

NO SPICES SHALL BE MADE BETWEEN CONTROLLER AND REMOTE CONTROL VALVE UNLESS OTHERWISE APPROVED.

CONTROL WIRING SEQUENCE CORRESPONDS TO OPERATING SEQUENCE OF REMOTE CONTROL VALVES AND AUTOMATIC CONTROLLER UNIT. (AS ON DRAWING)

WHEN USING RAIN GUARD LOCATE CONTROLLER IN A WAY NOT TO BE SPRAYED BY SPRINKLER

CITY OF PALMDALE STANDARD DETAIL

TYP. AUTOMATIC CONTROLLER (OUTDOORS)

Q I-1

ENGINEERING PLANNING PUBLIC WORKS

APPROVED BY ABOVE DATE IMPLEMENTED 1-10-10

1. COMMON WIFE TO BE WHITE & CONTROL, WINE TO BE BLACK IN COLOR UNLESS OTHERWISE NOTED.
2. NO SPICES SHALL BE MADE BETWEEN CONTROLLER & REMOTE CONTROL VALVE UNLESS OTHERWISE APPROVED.
3. CONTROL WRING SEQUENCE CORRESPONDS TO OPERATING SEQUENCE OF REMOTE CONTROL VALVES & AUTOMATIC SPRINKLER UNIT STATION CONNECTION - SEE IRRIGATION PLAN FOR CORRECT VALVE SEQUENCE.
4. WHEN USING RAIN GUARD LOCATE CONTROLLER IN A WAY NOT TO BE SPRAYED BY SPRINKLER

CITY OF PALMDALE TYPE "A"

TYP. ELECTRICAL METER (PEDESTAL) REVISIONS STANDARD DETAIL

ENGINEERING PLANNING PUBLIC WORKS I-2

APPROVED BY ABOVE DATE IMPLEMENTED 1-10-97

1. VALVES ARE TO BE INSTALLED IN SHRUB AREAS UNLESS OTHERWISE NOTED.
2. WHEN MORE THAN ONE VALVE IS LOCATED IN THE SAME AREA. PROVIDE A SPACE A MIN. OF 3 FT. APORT.
3. USE TEFLON TAPE ON ALL THREADED FITTINGS.

CITY OF PALMDALE STANDARD DETAIL

TYP. REMOTE CONTROL VALVE (STRAIGHT TYPE) REVISIONS

Cin I-3

ENGINEERING PLANNING PUBLIC WORKS

APPROVED BY ABOVE DATE IMPLEMENTED 1-10-9

NOTE1

1. VALVES ARE TO BE INSTALLED IN SHRUB AREAS UNLESS OTHERWISE APPROVED.
2. WHEN MORE THAN ONVALVE IS LOCATED IN THE SAME AREA. PROVIDE A SPACE A MIN. 3 FT, APART
3. USE TEFLON TAPE ON ALL THREADED FITTINGS.

CITY OF PALMDALE STANDARD DETAIL I-4

TYP. REMOTE CONTROL VALVE (ANGLE TYPE) REVISIONS

ENGINEERING PLANNING PUBLIC WORKS

APPROVED BY ABOVE DATE IMPLEMENTED 1-10-4

I-6

APPROVED BY ABOVE DATE IMPLEMENTED /-10-9/

CITY OF PALMDALE STANDARD DETAIL I-7

TYP. BACKFLOW PREVENTOR INSIDE ENCLOSURE REVISIONS

S 1-7

ENGINEERING PLANNING PUBLIC WORKS

PROVED BY ABOVE DATE IMPLEMENTED 1-10-9/

• NOTE:
• INSTALL HEAD FLUSH WITH TOP OF HARDSCAPE AT INTERSECTIONS & CORNERS.
• USE TEFLON TAPE ON ALL THREADED FITTINGS.

な

CITY OF PALMDALE STANDARD DETAIL I-10

TYP. 12" POP-UP SHRUB HEAD (SIDE GATED) REVISIONS

A B C

ENGINEERING APPROVED BY ABOVE PLANNING DATE IMPLEMENTED PUBLIC WORKS 1-10-91

1. INSTALL HEAD FLUSH WITH TOP OF HARDSCAPE AT INTERSECTION & COWERS.
2. USE TEFLON TAPE ON ALL THREADED FITTINGS.
3. BODY TO BE EDUIPED WITH BUILT-IN CHECK VALVE.

CITY OF PALMDALE STANDARD DETAIL I-11

TYP. 12" POP-UP SHRUB HEAD (BOTTOM FED) REVISIONS

Q — — —

ENGINEERING PLANNING PUBLIC WORKS —

PROVED BY ABOVE DATE IMPLEMENTED 1-10-91/

NOTES:

PROVIDE SAND BACKFILL A MIN. OF 12th OVER AND UNDER ALL PIPING UNDER PAVED AREAS AND A MIN. OF 6th ON ALL OTHER PRESSURE PIPING WHEN NOTED.

INSTALL ALL SUPPLY LINES (DOMESTIC AND IRRIGATION) MIN. 10 FEET IN HORIZONTAL DISTANCE FROM SEWER LINES AND MIN. 3 FEET ABOVE THE ELEVATION OF NEARBY SEWER LINES WHERE THESE LINES CROSS.

CITY OF PALMDALE STANDARD DETAIL

TYP. GENERAL DITCHING REVISIONS

— I-14

ENGINEERING PLANNING PUBLIC WORKS

APPROVED BY ABOVE DATE IMPLEMENTED 1-10-91

I-15

ENGINEERING PLANNING PUBLIC WORKS

APPROVED BY ABOVE DATE IMPLEMENTED 1-10-91

① - 2" x 8" D.F. or equal - Bolted to 4" x 4" posts w/ 3/8" φ galv. Bolts/ nuts

• ② -4" x 4" x 6" Douglas Fir or equal posts.
• - Minimum 24" concrete footing
• - Rails shall be covered with reflective sheeting with alternating red and white color bands 6" in width. Rails may be 8" to 12" wide and constructed of 3/4" exterior Douglas Fir plywood, grade A-8.

CITY OF PALMDALE...

BARRICADE DETAIL TYPE III Std. No. M-1

Approved

NOTES:

1. Use Concrete Channel Block where Horizontal Steel is called for.
2. Concrete shall be 1:2½:3 ½ Machine mix with maximum of 7 ½ Gallons water per Sack of cement.
3. Reinforcing steel shall be structural grade fs = 20,000 P.S.I.
4. Reinforcing Steel Bars shall lap 54 Bar diameters.

5. All Blocks shall be laid up in mortar with full head and bed joints. Webs of each course shall center on webs of courses below.

6. All cells in which steel is placed shall be filled with grout.
7. Mortar shall be 1-part Cement, 3 1/2 parts Sand (1/4 part Lime optional).
8. Pour footing and piers against undisturbed natural soil or soil that has been compacted to 90% Optimum Density per A.A.S.H.O. T99-49
9. Piers shall be located at maximum intervals of 10 feet center to center or as called for on plan.
10. The Contractor shall obtain a permit from the local Building and Safety Office prior to construction after the steel is in place and 24 hours prior to pouring concrete for the footing: The Contractor shall call the local Building and Safety Office for inspection; prior to grouting the wall cells, The Contractor shall again call the local Building and Safety Office for inspection. Final Inspection shall be called for upon completion of the wall.
11. Any height of block wall over 6 feet shall require structural calculations.

CITY OF PALMDALE 12. Note 10 applies to Private contractors only.

Block Wall Detail

Approved City Engineer Std. No. M-3.1

: SHEET 1 of 2.

Rev 2/99

：

9.0001.

STANDARD SPECIFICATIONS AND DETAILS FOR STREET NAME SIGNS AND BRACKETS

1. The street name and block number plates shall be aluminum alloy 6061 T6, 0.125 inches thick. Lengths shall be 24, 30, or 36 inches. No length greater than 36 inches will be accepted.
2. Street name and block number plates shall be covered with high intensity retro-reflective sheeting. Colors shall be silver-white legend on blue background.
3. The street name shall be comprised of 4-1/2 inch upper case letters and numbers and 3-3/8 inch lower case letters. The block number shall be comprised of 3 inch upper case letters and numbers.
4. Type "A" brackets shall be used. The street name plate shall be secured to the bracket with three (3) bolts. The block number plate shall be secured with two (2) bolts. Refer to standard detail M-5.1
5. Manufacture of signs shall be in accordance with Los Angeles County Department of Public Works specifications for high intensity retro-reflective street name signs.

3-0901

Area "A" = Backfill Shall Be Crushed Aggregate Base, Compacted To 95% Relative Compaction And Certified.

Area "B" Backfill Shall Be Granular Material Having A Minimum Sand Equivalent (SE) Of 20, Compacted To 90% Relative Compaction And Certified.

FOR TRENCHES ACROSS STREETS...

CITY OF PALMDALE...

Backfill And A.C. Repair Std. No.

Approved Bolt Thunderbird 1-9-91 M-6.1

Area“A”= Backfill Shall Be Crushed Aggregate Base, Compacted To 95% Relative Compaction And Certified.

Area "B" Backfill Shall Be Granular Material Having A Minimum Sand Equivalent (SE) Of 20, Compacted To 90% Relative Compaction And Certified.

FOR TRENCHES ALONG STREETS...

CITY OF PALMDALE...

Backfill And A.C. Repair Std. No.

Approved M-6.2

☐ ☐ ☐ ☐ 1

1. Type of Drawing, and the City of Palmdale Control Number. ST=Street, GD=Grading, SD=Storm Drain, etc. Shown like ST. 89-102. The 89, is the year. The 102 is a control number. Note both numbers are issued by the City of Palmdale
2. Tract Number or S.P.R.C. Number
3. Sheet ___ of ___.
4. 4.) Title of Drawing: Note what is on the subject sheet only.
5. Reviewed By: (Plan Check Engineer) With Date
6. Approved By: (City Engineer) With Date: Note this approval block is to be on the cover sheet only.
7. Revision Block: Use Los Angeles County Department of Public Works Revision Block as Standard.
8. Scale: Note for subject sheet only. Not details.
9. Design Engineer's Block. Containing *Prepared Under the Supervision of* and stamp or seal and signature.
10. Other Agency Approval Block. 1.e. City of Lancaster, Los Angeles County, or the State of California. This block is on the cover sheet only.
11. General Notes, with the private Engineer's Notice to Contractor and private Engineer's Statement of Responsibility.
12. Vicinity map with Major Street Names, City limits; north arrow toward top of sheet.
13. Bench Mark: County of Los Angeles, Paimdale Quad. Elevation, location, benchmark, number, description, and adjustment date. Legend and symbols may be placed in this area also.
14. Key Map containing scale, bar scale, north arrow, street names, key to sheet numbers.
15. 15 Construction Notes.
16. Typical sections, typical details, and special details as space permits.
17. ○ Construction Notes - Numbers Only And Consistent Throughout Plan Set.

△ Curve Data - Letters Only And Consistent Throughout Plan Set.

Curve Data - Letters Only And Consistent Throughout Plan Set.

Plan Revisions - Numbers Only And Consistent Throughout Plan Set.

CITY OF PALMDALE...

Sample Title Sheets

Approved Colin Mundred City Engineer Date Std. No. M-7.2

Std. No. M-7.2

∴-0.9<1.31.

EXISTING PAVEMENT REMOVAL ( CROSS-HATCHED )

ASPHALT CONCRETE PAVEMENT OVERLAY ( HATCHED )

NEW ASPHALT CONCRETE PAVEMENT ( SHADED )

NOTES...

1. Amount Of Base And Pavement Will Be Determined By A Soll Test. Subdivider's Engineer Shall Provide Test After Streets Have Been Rough Graded. The Plans Must Be Revised To Show Actual Pavement And Base To Be Constructed. Base Material And Placement Shall Conform To The Standard Specifications For Public Works Construction. The Crushed Aggregate Base Shall Consist Entirely Of Crushed Rock And Rock Dust.
2. Variable Thickness A.C. Pavement To Be Constructed In Two Courses.
3. See City 01 Palmdale Std. No. S-2 For Cross-Fall Dimensions.
4. See City Of Polmdale Std. No. S-1.2 For Street Width Dimensions.

CITY OF PALMDALE...

Typical Street Section Std. No. S-1.1

Approved Green Thousand同比增长1-9.91

STREET WIDTH DATA

Right Of Way

MAJOR HIGHWAY

NOTES...

1. Amount Of Base And Pavement Will Be Determined By A Soll Test. Subdivider's Engineer Shall Provide Test After Streets Have Been Rough Graded. The Plans Must Be Revised To Show Actual Pavement And Base To Be Constructed. Base Material And Placement Shall Conform To The Standard Specifications For Public Works Construction. The Crushed Aggregate Base Shall Consist Entirely Of Crushed Rock And Rock Dust.
2. Variable Thickness A.C. Pavement To Be Constructed In Two Courses.
3. See City Of Polmdale Std. No. S-2 For Cross-Fall Dimensions.

CITY OF PALMDALE...

Typical Street Section Std. No. S-1.3

Approved City Engineer Date

第一题 A.1

Notes:

1. Curb Location And Grade Control.
2. Construct Curb And Gutter With P.C.C. Type 520-C-2500
3. All Exposed Corners On P.C.C. Curb And Gutters To Be Rounded With A 3/4" Radius.

This STANDARD is VOID use

APWA STD 120-1, A2-200(8)

ITY OF PALMDALE...

Curb And Gutter, 8"C.F. Std. No.

Approved City Engineer S-3.1

No108:

1. Curb Location And Grade Control.
2. Construct Curb And Gutter With P.C.C. Type 520-C-2500
3. All Exposed Corners On P.C.C. Curb And Gutters To Be Rounded With A 3/4" Radius.

This STANDARD is VOID use

APWA STD 120-1, A2-150(6)

CITY OF PALMDALE...

City of Palmdale Plant List

Plant Type

desert Accent

Botanical Name Common Name Evergreen/Deciduous

Agave americana Century Plant evergreen

Agave deserti Desert Agave evergreen

Agave shawii Shaw's Century Plant evergreen

Agave vilimoriniana Octopus Agave evergreen

Atriplex lentiformis Quail Bush deciduous

Chrysotyamnus nauseous Rabbit Bush deciduous

Dasylirion sp. Desert Spoon evergreen

Fouquieria splendens Ocotillo evergreen

Hesperaloe parvifolia Red Yucca evergreen

Larrea tridentata Creosote Bush evergreen

Nolina sp. Bear Grass evergreen

Opuntia sp. Prickly Pear evergreen

Opuntia sp. Prickly Pear evergreen

Yucca aloifolia Spanish Bayonet evergreen

Yucca baccata Datil Yucca evergreen

Yucca brevifolia Joshua Tree evergreen

Yucca elata Soaptree Yucca evergreen

Yucca filamentosa Adam's Needle evergreen

Yucca gloriosa Spanish Dagger evergreen

Yucca recurvifolia Pendulous Yucca evergreen

Yucca recurvifolia ncn evergreen

Yucca rigida ncn evergreen

Yucca rostrata Beaked Yucca evergreen

Yucca schidigera Mohave Yucca evergreen

Yucca whipplei Whipple's Yucca evergreen

Thursday, October 22, 1998

Plant Type

Plant Type

Plant Type

Plant Type

grass

Botanical Name Common Name Evergreen/Deciduous

Pennisetum setaceum & cvs. Fountain Grass Varies

Stipa sp. Feather Grass, Needle Grass

ground Cover

Botanical Name Common Name Evergreen/Deciduous

Baccharis pilularis Dwarf Coyote Bush evergreen

Cerastium tomentosum Snow-In-Summer

Euonymus fortunei Winter Creeper evergreen

Fragaria chiloensis Evergreen Strawberry evergreen

Hedera helix English Ivy evergreen

Hypericum calycinum St. Johnswort evergreen

Juniperus sp. Juniper evergreen

Lonicera japonica halliana Hall's Honeysuckle evergreen

Rosmarinus officinalis Rosemary evergreen

Teucrium chamaedrys Germaner evergreen

Vinca major Periwinkle evergreen

Palm

Botanical Name Common Name Evergreen/Deciduous

Chamaerops humilis Mediterranean Fan Palm evergreen

Trachycarpus fortunei Fortune Windmill Palm evergreen

Washingtonia filifera California Fan Palm evergreen

perennial

Botanical Name Common Name Evergreen/Deciduous

Achillea Yarrow

Armeria maritima Thrift, Sea pink evergreen

Aster sp. Aster

Aurinia saxatile Basket of Gold

Baileya multiradiata Desert Marigold

Chrysanthemum sp. Shasta Daisy, Mums

Coreopsis sp. Coreopsis

Thursday, October 22, 1998

Plant Type shrub

Botanical Name Common Name Evergreen/Deciduous

Abeila grandiflora Glossy Abelia Partially Deciduous

Abelia grandiflora prostrata Prostrate abelia partially Deciduous

Acacia greggii Catclaw Acacia deciduous

Arbutus unedo Strawberry Tree evergreen

Arctostaphylos sp. Manzanita evergreen

Atriplex hymenelytra Desert Holly evergreen

Atriplex semibaccata Creeping Saltbush evergreen

Baccharis sarothroides Desert Broom evergreen

Thursday, October 22, 1998

Berbens thunbergii Barberry deciduous

Buxus microphylla japonica Japanese Boxwood evergreen

Caesalpinia sp Bird of Paradise Bush evergreen

Calliandra californica Baja Fairy Duster evergreen

Cassia artemisiodes Feathery Cassia evergreen

Cassia nemophila Desert Cassia varies

Cercis occidentalis Western Redbud deciduous

Chaenomeles japonica Flowering Quince deciduous

Chilopsis linearis Desert Willow deciduous

Cistus sp. Rockrose evergreen

Cordia sp. Cordia evergreen

Cotinus coggygria Smoke Bush deciduous

Cotoneaster sp. Cotoneaster Varies

Cowania mexicana Cliff Rose evergreen

Dalea frutescens Black Dalea evergreen

Dalea greggii Trailing Indigo Bush evergreen

Dalea pulchra Indigo Bush evergreen

Eleagnus pungens Silverberry evergreen

Encellia farinosa Desert Encellia evergreen

Euonymus sp. Evergreen Euonymus Varies

Fallugia paradoxa Apache Plume evergreen

Feijoa selloana Pineapple Guava evergreen

Forsythia intermedia Forsythia deciduous

Heteromeles arbutifolia Toyon evergreen

Hibiscus syriacus Rose of Sharon evergreen

Ilex cornuta "Burfordii" Chinese Holly

Ilex vomitoria Yapon Holly evergreen

Juniperus californica California Juniper evergreen

Juniperus sp. Juniper evergreen

Lagerstroemia indica Crape Myrtle deciduous

Lavandula sp. Lavender evergreen

Thursday, October 22, 1998

Leonotis leonurus Lion's Tail evergreen

Species Lions Eugreen

Leucophyllum sp. Texas Ranger evergreen

Ligustrum japonicum Privet evergreen

Mahonia aquifolium Oregon Holly Grape evergreen

Myrtus communis Myrtle evergreen

Nandina domestica Heavenly Bamboo evergreen

Narcissus Daffodil

Nerium oleander Oleander evergreen

Photinia fraseri Photinia evergreen

Photinia serrulata Chinese Photinia evergreen

Pinus mugho Mugho Pine evergreen

Pittosporum tobira Mock Orange evergreen

Platycladus orientalis Oriental Arborvitae evergreen

Platycladus orientalis "Westm "Westmont" Golden Arborvitae evergreen

Punica granatum "Wonderful" Pomegranate deciduous

Pyracantha sp. Firethom evergreen

Rhaphiolepis "Majestic Beauty Majestic Beauty Rhaphiolepis evergreen

Rhaphiolepis umbellata ncn evergreen

Rosa banksiae Lady Bank's Rose evergreen

Rosa sp. Rose evergreen

Ruellia sp. Ruellia evergreen

Salvia greggii Autumn Sage evergreen

Santolina chamaecyparissus Lavender Cotton varies

Syringa chinensis Chinese Lilac evergreen

Syringa vulgaris Common Lilac evergreen

Tecoma stans v. angusta Hardy Yellow Trumpet Flower evergreen

Viburnum sp. Snow Ball Bush varies

Xylosma congestum Shiny Xylosma evergreen

Tree

Plant Type Tree

Botanical Name Common Name Evergreen/Deciduous

Albizia julibrissin Silk Tree, Mimosa Deciduous

Thursday, October 22, 1998

Broussonetia papyrifera Paper Mulberry deciduous

Calocedrus decurrens Califomia Incense Cedar evergreen

Cedrus atlantica glauca Blue Atlas Cedar evergreen

Cedrus deodora Deodar Cedar evergreen

Cedrus libnani Cedar of Lebanon evergreen

Celtis australis European Hackberry deciduous

Celtis sinensis Chinese Hackberry deciduous

Cercidium floridium Blue Palo Verde deciduous

Cercidium microphyllum Little Leaf Palo Verde Deciduous

Cercidium praecox Sonoran Palo Verde deciduous

Cercis canadensis Easter Redbud deciduous

Chitalpa tashkentensis Chitalpa deciduous

Cordyline australis Giant Dracaena evergreen

Cupressus glabra Arizona Cypress Evergreen

Fraxinus oxycarpa Raywood Ash deciduous

Fraxinus velutina "Modesto" Modesto Ash deciduous

Fraxinus velutina "Rio Grande Fantex Ash deciduous

Gleditsia triacanthos inermis c Thornless Honey Locust evergreen

Juniperus chinensis "Torulosa Hollywood Juniper evergreen

Koelreuteria paniculata Goldenrain Tree deciduous

Parkinsonia aculeata Mexican Palo Verde deciduous

Pinus brutia Calabrian Pine evergreen

Pinus eldarica Mondell Pine evergreen

Pinus halepensis Aleppo Pine evergreen

Pinus monophylla Single Leaf Pinon Pine evergreen

Pinus pinea Italian Stone Pine evergreen

Pistacia atlantica Mt. Atlas Pistacio deciduous

Pistacia chinensis Chinese Pistache deciduous

Pithecellobium flexicaule Texas Ebony evergreen

Platanus acerifolia London Plane Tree evergreen

Platanus wrightii Arizona Sycamore evergreen

Thursday, October 22, 1998

Prosopis alba Argentine Mequite evergreen

Prosopis chilensis Chilean Mesquite deciduous

Prosopis glandulosa Texas Mesquite deciduous

Prunus caroliniana Carolina Laurel Cherry evergreen

Pyrus calleryana Flowering Pear evergreen

Quecus suber Cork Oak evergreen

Quercus ilex Holly Oak evergreen

Quercus kellogii California Black Oak deciduous

Robinia ambigua "Idahoensis" Idaho Flowering Locust deciduous

Sequoiaadendron giganteum Giant Sequoia evergreen

Sophora japonica Japanese Pagoda Tree evergreen

Vitus angus-castus Chaste Tree varies

Zelkova serrata Sawleaf Zelkova deciduous

Plant Type vine

Botanical Name Common Name Evergreen/Deciduous

Campsis radicans Trumpet Vine deciduous

Campsis tagliabuana "Madam" Trumpet Creeper deciduous

Euonymus fortunei radicans Winter Creeper evergreen

Gelsemium sempervirens Carolina Jessamine evergreen

Jasminum mesneyi Primrose Jasmine evergreen

Lonicera sp. Honeysuckle varies

Macfadyena unguis-cati Catclaw Vine partially Deciduous

Parthenocissus tricuspidata Boston Ivy evergreen

Polygonum aubertii Silver Lace Vine deciduous

Rosa banksiae Lady Bank's Rose evergreen

Wisteria sp. Wisteria deciduous

Thursday, October 22, 1998