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TRENCH CONSTRUCTION DETAILS <br />TRENCH ROCK COVERED WITH PERMEABLE" <br />PIPE TO NEXT SYNTHETIC FABRIC OR 4" LAYER OF MARSH HAY OR <br />INLET DROP BOX STRAW COVERED WITH UNTREATED BUILDING <br />PAPER (RED ROSIN) <br />EARTH BACKFILL <br />ABOVE TOP OF ROCK <br />�. DEPTH OF CLEAN ROCK <br />3/4" TO 2'/Z" DIA. <br />4" DIAMETER <br />INSPECTION <br />WELL WITH <br />CAP SOP T/Or�/A� <br />no* I -wr� <br />0 <br />o y <br />DROP BOX <br />L 7/' 1 <br />TRENCH LENGTH - - --- <br />OVERFILL TO ALLOW NOTES: <br />FOR SETTLING <br />_ -�INSPECTION <br />WELL <br />BACKFILL 0 f(o OF SOIL <br />° BACKFILL <br />o AL <br />�. rZ 0 1 <br />t O - Cr 2" DEPTH OF <br />___ROCK ABOVE <br />C. <br />0 PIPE <br />ROCK o OF <br />s o ROCK BELOW <br />PIPE <br />I. BOTTOM OF TRENCH MUST BE LEVEL. TOP OF FRENCH <br />ROCK MUST BE LEVEL. <br />2. DISTRIBUTION PIPE SHALL BE INSTALLED LEVEL'AND <br />COVERED WITH 2 LACHES OF TRENCH ROCK. <br />3 DISTRIBUTION PIPE: SHALL BE PERFORATED PLASTIC <br />WITH '/2 INCH OR LARGER HOLES. ONE OF THE <br />ROWS OF HOLES MUST BE LOCATED ALONG THE <br />BOTTOM OF THE PIPE. PIPE MUST HAVE A BEARING <br />STRENGTH OF AT LEAST 1000 1-8/17T. <br />4. SCARIFY Tc?ENCH BOTTOM AND SIDEWALLS AS HIGH <br />AS ROCK WILL BE PLACED IN THE TRENCH <br />INORDER TO EXPOSE NATURAL SOIL. REMOVE <br />LOOSE SOIL BEFORE PLACING ROCK. <br />DETAIL 18 <br />