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ok <br /> 4 BEDROOM HOME = 320 L.F. OF GRAVITY TRENCH <br /> USE 1 EACH, 1500 GALLON SEPTIC TANK WITH 2 EACH <br /> ORENC❑ RISERS AND LIDS <br /> NATIVE EARTH BACKFILL <br /> 12' <br /> -WOVEN FILTER FABRIC, <br /> 42• G EACIIM PAPER OR 2• STRAW DO <br /> S' VE SCOUR FROM SMWALLS <br /> PRIOR M BACKF011iG <br /> ' VIA. PEtF[lRATEB PPE <br /> 19' <br /> • TO 2-1/2' VERY CLEAN <br /> AGWrATE MAIN ROCK. SUBMIT <br /> SAMPLES PRIOR TO PumiASE <br /> 24' <br /> TYPICAL TRENCH DETAIL <br /> NTS <br /> LOT 7 <br />