• All sprinkler heads shall be set perpendicular to finished grades unless otherwise designated on the plans.
  • Testing of the Irrigation System
  • The contractor shall request the presence of the City Landscape Architect at least 48 hours in advance of testing.
  • Test all pressure lines under hydrostatic pressure of 150 lbs./sq.in. and prove watertight.
  • Sustain pressure in lines for not less than two hours. If leaks develop, replace and repeat test until entire system is proven watertight.
  • 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.
  • 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