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4 BEDROOM HOME = 320 L.F. OF GRAVITY TRENCH <br /> USE 1 EACH, 1500 GALLON SEPTIC TANK WITH 2 EACH <br /> ORENCO RISERS AND LIDS <br /> NATIVE EARTH 6ACIffO.L <br /> I2' <br /> -WOVEN FILTER FAHRYC. <br /> 42' 0_EACHm PAPER OR 2' STRAW OK) <br /> 6' SCOUR FROM SIDEWALLS <br /> TO BACKFILL M <br /> ll • DIA. PERFORATED PIPE <br /> IV <br /> ' TO 2-t/2' VERY CLEAN <br /> AGATE DRAIN ROCK. SLOUT <br /> SAMPLES PRIOR TO M91CHASE <br /> 24' <br /> TYPICAL TRENCH DETAIL <br /> NTS <br /> LOT 3 <br />