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• <br /> . FIGURE 5 <br /> 12- EARTH C. <br /> COVER GRASS COVER <br /> 4.--I--j.• <br /> is ISI i' : <br /> SEPTIC <br /> TANK —DROP BOXES <br /> LEM <br /> 4' DISTRIBUTION ' ' } 1 <br /> PIPES I I <br /> ' 1 I ,. <br /> r DROPI I j ' 1 <br /> LI, SEPTIC . ' B0=`"' a I •- - - = =-� +' ' <br /> TANK ,i I I\ EXTRA TRENCHES' -,i <br /> • <br /> 1 I I CAN BEADDED IF I " I <br /> I INEECESSARY� r I <br /> 4` WATER-TIGHT Is: <br /> PIPES - \ I -- I :: II <br /> SEWAGE TREATMENT SYSTEM WITH DROP BOXES <br /> �. <br /> NOTES <br /> OUTLET TO FIGURE 6 <br /> TRENCH <br /> 11111 I. PIPES SHBE AT LEAST <br /> 4-ALL INCH DIAMEOULDTER <br /> INLET FROM <br /> SEPTIC TANK 2. ELEVATION OF INLET AND SUPPLY <br /> OR PREVIOUS , LINE TO NEXT DROP BOX MAY BE <br /> DROP BOX - SUPPLY LINE ADJUSTED UP OR DOWN FOR DESIRED <br /> TO NEXT EFFLUENT LEVEL IN TRENCH <br /> DROP BOX <br /> /� 6. �� 3. SUGGESTED TRENCH LIOUID LEVEL <br /> IS 2'ABOVE TOP OF OUTLET PIPE <br /> 4. INVERT OF INLET MUST BE AT LEAST <br /> ONE INCH HIGHER THAN INVERT OF <br /> • • SUPPLY PIPE TO NEXT DROP BOX <br /> OUTLET TO 5. TRENCHES MAY OUTLET ONE SIOE OR <br /> s. TRENCH BOTH SIDES OF DROP BOX <br /> 0' <br /> IN <br /> � �^ e I • INLET <br /> I _ <br /> --1 ) 1 � SuPPLY LINE i �- �, I SUPPLY <br /> INLET I i i : , I <br /> Y4-1 <br /> _' I. LI 1 , 4111 <br /> I -1- I <br /> I 2 I r• i- <br /> •1 1 �_I _ 0 <br /> • <br /> • I -OUTLET TO TRENCH <br /> -OUTLETS <br /> I TO TRENCH I I <br /> I : I---------) _ <br /> DROP BOX <br />