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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 /> ORENCI3 RISERS AND LIDS <br /> NATIVE EARTH BACKFILL <br /> 12• <br /> -NM <br /> -WOVEN FILTER FABRIC, <br /> 36' 0.EACH06 PAPER OR 2' STRAW 110 <br /> 6' SCOUR FROM SIBEVALLS <br /> PRIOR TII BACIFB.LOW <br /> 16' ' IIA, PERFORATES PB°E <br /> ' TO 2-I/2' VERY CLEAN <br /> AGGREGATE DRAIN ROCK SUBMIT <br /> SAMPLES PRIOR TO PllK3iASE <br /> .24- <br /> TYPICAL <br /> 4'TYPICAL TRENCH DETAIL <br /> NTS <br /> LOT 9 <br />