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T , Compact in 24" max. <br /> Variable \ ; layers to a min. relative <br /> compaction of 85%. <br /> O.D./2 Compact in 6" layers <br /> to a minimum relative <br /> �\\\\ compaction of 90%. <br /> 10" Min. O.D.- 10" Min. <br /> 0.D. <br /> + 20" Min. <br /> TYPICAL TRENCH BACKFILL <br /> aa0000 <br /> 0 0 <br /> Native or Gravel Material only. <br /> PLAN Except for Drivewa no Asphalt <br /> 1 Concrete permittedy along <br /> frontage area. <br /> ® 12" Existing Pipe <br /> ,///--12" DIA. MIN. (Match Existing Grade) <br /> I <br /> oI I 6„ <br /> a o <br /> a <br /> a a a <br /> a <br /> 3" <br /> CLASS "B" TYPICAL SECTION <br /> NOTES CONCRETE <br /> 0 GRATE AND FRAME SHALL CONFORM TO IMPROVEMENT STANDARD NO. CW—M7. <br /> 27. 18" PIPE BARREL SHALL BE CLASS III R.C.P., OR CLASS 2 NON—REINFORCED <br /> CONCRETE PIPE AS A MINIMUM. <br /> 3. CATCH BASIN MAY BE USED WHERE APPROVED BY THE AGENCY. <br /> FTJ REFER TO TYPICAL TRENCH BACKFILL FOR PIPE COVER. <br /> REVISION DATE COUNTYWIDE IMPROVEMENT STANDARDS APPROVED BY <br /> COUNTY OF SAN JOAQUIN <br /> SAN JOAQUIN COUNTY DATE <br /> 18" STORM DRAIN MRWW of ROX WORM JUNE 1997 <br /> MODIFIED INLET CATCHBASIN IMPROVEMENT CW—D14 <br /> STANDARD NO. <br />