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TRENCH CONSTRUCTION DETAILS- <br />7 <br />PIPE TO NEXT 4" DIAMETER INSPECTION <br />T—INLET DROP BOX WELL WITH CAP <br />�/ 4 TO 6 INCH LAYER OF o <br />EARTH BACKFILL AT LEAST MARSH HAY OR STRAW AND <br />ABOVE TOP OF ROCK ! A LAYER OF RED ROS IN <br />o . <br />PAPER <br />4"-DiSTRIBUTION IP <br />AT LEAST 6" DEPTH OF CLEAN ° <br />•., ROCK 3/4" TO 2 '/2" DIA. o / <br />DROP BOX �— �� <br />MAXIMUM LENGTH - 100 FEET —•-{ <br />OVERFILL <br />�4 TO 6 INCHES <br />INSPECTION <br />W ELL <br />BACKFILL ° <br />0 <br />0 <br />° <br />NOTES: 1. BOTTOM OF TRENCH MUST BE FLAT ALONG <br />LENGTH. <br />2. SLOPE ON DISTRIBUTION PIPE IS BETWEEN <br />LEVEL AND 4 INCHES PER 100 FEET. <br />RECOMMENDED SLOPE IS I TO 2 INCHES PER <br />100 FEET. <br />3. DISTRIBUTION PIPE CAN BE PERFORATED <br />PLASTIC WITH '/2 INCH OR LARGER HOLES. <br />ROWS OF HOLES MUST ESE <br />r o ( �2" DEPTH OF LOCATED ALONG THE BOTTOM OF THE PIPE. <br />ROCK ABOVE ONE — FOOT AGRICULTURAL DRAIN TILE CAN <br />o —! PIPE BE USED WITH A 1/4 INCH SPACING. <br />ROCK ° AT LEAST 6" OF <br />ROCK BLOW 4. SCARIFY TRENCH BOTTOM AND SIDEWALLS <br />PIPE AS HIGH AS ROCK WILL BE PLACED IN THE <br />TRENCH IN ORDER TO EXPOSE NATURAL SOIL. <br />�— 18" TO 36" —J REMOVE LOOSE SOIL BEFORE PLACING ROCK. <br />G" `TO 12" OF <br />SO!L BACKFILL <br />—11. <br />5. WHERE TREES ARE PRESENT OR LIKELY TO BE <br />PRESENT DURING THE LIFE OF THE SYSTEM, <br />12 INCHES OF ROCK MUST BE PLACED UNDER <br />THE DISTRIBUTION PIPE. <br />IL <br />