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OUTLET TO <br />TRENCII <br />INLET FROM ( �� <br />SEPTIC TANK I <br />OR PREVIOUS <br />ln•VP UVA ` SVI'1 •t_r I114L <br />TO NEXT <br />DROP COX <br />C! . OIJTLF T TO <br />11 7 11 E rr. Il <br />NOTES <br />1. ALL PIPES SHOULD BE AT LEAST 4-INCH <br />DIAMETER. <br />2. ELEVATION OF INLET AND SUPPLY LINE TO <br />NEXT DROP BOX MAY DE An.)USTEO UP OR <br />vv•YN ron LW rJ 1 l r AFL m <br />1nENCH, <br />J SUGGESTED TRENCH LIOUID LEVELS: (A) 2 INCHES <br />ABOVE TOP OF OUTLET PIPE IF PERMEABLE <br />SYNTIIETIC FABRIC COVERS ROCKY (B) AT 7OP <br />OF OUTLET PIPE IF HAY OR STRAW AND <br />BUILDING PAPER COVERS ROCK. <br />4 INVERT OF INLET MUST BE AT LUST ONE INCH <br />►IIGIIER THAN INVERT OF SUPPLY PIPE TO <br />NEXT OnOP COX. <br />S TnENCIIES MAY OUTI F T rmE SIDE OR DOT" <br />SIOrs rF nno!, qOx <br />}- — <br />6UprLY <br />- INLE I <br />�� <br />LINE <br />r <br />SUPPLY LINE <br />2' I <br />, 1 <br />_ <br />—^ <br />—t- <br />—-OIJTLETS �" <br />I L I <br />�_------------- <br />TO TRENCII <br />I I <br />I <br />CUTLET TO <br />7NErrCH <br />DROP BOX <br />GRAVELLESS TRENCH CONSTRUCTION DETAILS <br />Inlet Pipe to Next 1 112 Male <br />Drop Box Adapter — <br />if <br />12" Soll Backlill <br />Corrugated Tubing Coverec <br />UT _ _ _ _ _ _ _ _ _ with Geolextile Fnbric - _ _ <br />Drop BOA <br />Trench Length a up to 100 Feet <br />1 112" Inspavion <br />Well <br />Overfill to Allow NOTES: 1. Bottom of trench must be level. Top <br />for Settling of tubing must be level. <br />�- - Soil--- 12" of Soil <br />24" <br />Backfill Backlill <br />12' <br />- 0-14� i <br />_ Holes Located <br />24 at 4 and <br />8 O'Clock <br />2. Scarily trench bottom and sidewalk <br />at least 12 inches above trench bottom <br />to expose natural soil. <br />3. For proprietary products consult <br />manufacturers performance crileriia. <br />Figure D-33 <br />