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4 BEDROOM HOME = 320 L.F. OF GRAVITY ,TRENCH <br /> WITH 23' DEEP, 3'0 SEEPAGE PIT AT END OF 80' <br /> TRENCH <br /> USE 1 EACH, 1500 GALLON SEPTIC TANK WITH 2 EACH <br /> ORENCO RISERS AND LIDS <br /> SggY. � <br /> NATLVE EARTH BACKFOI <br /> I2• <br /> WOVEN FILTER FABRIC, <br /> a- —e CLEAOHOM PAPER OR 2' STRAW OIC) <br /> 6' SCOUR FROM SIDEVALLS <br /> PRMR TO BACKFnJJM <br /> BIO. PERFORATED PIPE <br /> 23• <br /> ' TO 2-1/2' VERY CLEAN <br /> ACRGREWTE BRAIN ROCK SUBMIT <br /> SAMPLES PRIOR TO PURCHASE <br /> TYPICAL TRENCH DETAIL <br /> NTS <br /> LOT 4 <br />