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NOTES <br /> TO I. ALL PIPES SHOULD BE AT LEAST 4-INCH <br /> 1J1/_OUTLET TRENCH DIAMETER. <br /> INLET FROM <br /> SEPTIC TANK 2. ELEVATION OF INLET AND SUPPLY LINE TO <br /> OR PREVIOUS NEXT DROP BOX MAY DE ADJUSTED UP OR <br /> DIlU{' 6" -SUPPLY LINE DOWN FOR DESIRE_!. rr-FLUEN1 LEVEL IN <br /> r0 NEXT TRENCH.DROP OOX g SUGGESTED TRENCH LIQUID LEVELS: (A) 2 INCHES <br /> _.. ABOVE TOP OF OUTLET PIPE IF PERMEABLE <br /> ----'--111.• -� SYNTHETIC FABRIC COVERS ROCK). (B) AT TOP <br /> OF OUTLET PIPE IF HAY OR STRAW AND <br /> BUILDING PAPER COVERS ROCK. <br /> 4. INVERT OF INLET MUST BE AT LEAST ONE INCH <br /> HIGHER THAN INVERT OF SUPPLY PIPE TO <br /> NEXT DROP BOX. <br /> -1 -OUTLET TO <br /> TRENCH 5. TRENCHES MAY OUTLET ONE SIOE OR BOTH <br /> SIDES OF DROP BOX. <br /> 44- ---- -- -..--.-"---i.-7.--------.-- r ,>f ` �? <br /> ( �i SUPPLY i , INLET <br /> --—AINIJ_ , , j._ LINE fdilb - -SUPPLY LINE <br /> C!� t. I I I <br /> T 2.. I *c I / <br /> ' <br /> -• T I 11 , <br /> I <br /> I _ - '"I i LL <br /> .1111t- <br /> -,.- <br /> --OUTLETS <br /> I TO TRENCH I I -OUTLET TO <br /> �___..._ ..I ----•-- � TRENCH <br /> DROP BOX • <br /> GRAVELLESS TRENCH CONSTRUCTION DETAILS <br /> r/�1 1/2" Inspec!ion <br /> I Inlet Pipe to Next 1 1/2 Mate i Well <br /> Drop Box 0 <br /> Adapter <br /> 1i12" Soil Backfill kxfS# <br /> -.1 :) o' <br /> Corrugated Tubing Covered""" • <br /> �"'In nnnpr).Dr with Geotextile FabriSnnnnnnnnr <br /> Drop Box 14 <br /> Trench Length = up to 100 Feet ►1 <br /> Overfill to Allow • <br /> NOTES: 1. Bottom of trench must be level. Top <br /> for Settling of tubing must be level. <br /> `` B ckfill /` <br /> !//j' 12" of Soil 2. Scarily trench bottom and sidewalls <br /> 24" { Backfill at lead 12 inches above trench bottom <br /> + <br /> 1 -- - 12" <br /> -� to expose natural soil. <br /> � 3. For proprietary products consult <br /> Holes Located manufacturers performance criteria. <br /> "' 24" at.4 and <br /> B O'Clock <br /> ) <br /> Figure D-33 <br />