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                    "text": "DETENTION/RETENTION BASIN NOTES (continued)",
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                    "text": "4. 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.",
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                {
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                    "text": "5. Pipe shall be encased per STD Plan D-6.",
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                    "text": "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.",
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                    "text": "7. Soils engineer shall verify and approve trench bottom soil prior to placement of pipe.",
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                    "text": "C. OUTLET STRUCTURES",
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                {
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                    "text": "1. The drain pipe encasement shall be placed on a firm foundation approved by the soils engineer.",
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                    "text": "2. 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.",
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                    "text": "3. 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.",
                    "attrs": {
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                    "text": "4. The drain pipe shall be a minimum of 15\" in diameter and shall be constructed with water tight joints.",
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                },
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                    "text": "5. All concrete shall be Portland Cement Concrete 420-C-2000 unless otherwise specified.",
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                },
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                    "text": "CITY OF PALMDALE...",
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                    "text": "BASIN NOTES",
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                },
                {
                    "id": "p198.1.14",
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                    "text": "Std. No.",
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                {
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                    "text": "Approved City Engineer Date",
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                },
                {
                    "id": "p198.1.16",
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                    "text": "D-7.2",
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