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i rts-21IN <br /> MONITORING WELL PURGING PROTOCOL <br /> EMCON MEASURE AND RECORD DEPTH TO WATER <br /> ASSOCIATES AND WELL TOTAL DEPTH <br /> CHECK FOR FLOATING PRODUCT <br /> I <br /> YES NO <br /> ICALCULATE PURGE VOLUME BY <br /> DO NOT SAMPLE WELL USING THE FOLLOWING ECUATION <br /> I FOR DISSOLVED 2 <br /> P . n r h x 7 48 x 3 <br /> CONSTITUENTS <br /> where <br /> P - calculated purge volume (gallons) <br /> TI = 314 <br /> r - radius of well casing in feet <br /> h = height of water column in feet <br /> EVACUATE WATER FROM WELL ECaUAL TO <br /> WELL EVACUATED TO PRACTICAL LIMITS THE CALCULATED PURGE VOLUME WHILE <br /> OF DRYNESS BEFORE REMOVING MONITORING GROUND-WATER STABILIZATION <br /> CALCULATED PURGE VOLUME INDICATOR PARAMETERS <br /> (pH, CONDUCTIVITY. TEMPERATURE) <br /> AT INTERVALS OF ONE CASING VOLUME <br /> I :�NO YES <br /> FINAL TWO SETS OF GROUND-WATER <br /> STABILIZATION INDICATOR PARAMETER <br /> I MEASUREMENTS MEET THE FOLLOWING WELL RECHARGES TO A LEVEL <br /> CRITERIA SUFFICIENT FOR SAMPLE <br /> pH t 0 1 pH units COLLECTION WITHIN 24 HOURS <br /> I COND = t 10% OF EVACUATION TO DRYNESS <br /> TEMP = t 10 °F <br /> YES NO <br /> YES <br /> WELL PURGING CONTINUE PURGING, FIELD TEST FIRST FFECORD WELL <br /> 1 CRITERIA MET, t0.- i t ADD�T�Oir.. RECHARGE WATER FOR S DRY FOR <br /> J1INDICATOR PARAMETERS, PURPOSES O <br /> PROCEED TO CASING VOLUME OF F <br /> WELL SAMPLING WATER, MONITORING THEN PROCEED TO WELL SAMPLING <br /> INDICATOR PARAMETERS SAMPLING <br /> FOR STABILITY <br /> FlGLIRE <br /> EMCON WELL PURGING PROTOCOL Associates B-1 <br />