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t <br /> t <br /> MONITORING WELL PURGING PROTOCOL <br /> MEASURE AND RECORD DEPTH TO WATER AND <br /> Uo <br /> WELL TOTAL DEPTH <br /> OT <br /> CALCULATE PURGE VOLUME BY ! <br /> USING THE FOL LOWING EQUATION: <br /> P=arahx7.48 x3 1 I <br /> whore: t <br /> P=calculated purge volume(gallons) <br /> n=3.14 <br /> r=radices of well casing in feet � <br /> h=height of ureter column in feet <br /> i <br /> j <br /> EVACUATE NATER FROM WELL EQUAL TO t <br /> THE CALCULATED PURGE VOLUME WEnE <br /> MONITORING GROUNDWATER <br /> STABILIZATION INDICATOR PARAMETERS <br /> (pK CONDUCTIVITY,TEMPERATURE)AT t <br /> INTERVALS OF ONE CASING VOLUME. <br /> i <br /> WELL EVACUATED TO PRACTICAL LIMITS <br /> OF DRYNESS BEFORE REMOVING <br /> CALCULATED PURGE VOLUME t <br /> NO YES <br /> FINAL TWO SETS OF GROUNDWATER <br /> STABILizATION INDICATOR PARAMETER i <br /> MEASUREMENTS MEET THE FOLLOWING <br /> CRITERIA: WELL RECHARGES TO A LEVEL `I <br /> PH =:L 4.1 PH units SUFFICIENT FOR SAMPLE <br /> COND. —:k 10% COLLECTION NWTHIN 24 HOURS <br /> TEMP. =1 1.0 OF OF EVACUATION TO DRYNESS. <br /> YES NO YES NO t <br /> WELL PURGING CONTINUE PURGING:EVACUATE FIELD TEST FIRST RECORD WELL <br /> CRITERIA MET; ADDITIONAL CASING VOLUME RECHARGE WATER FOR AS DRY FOR <br /> PROD TO OF WATER,MONITORING J 11-DICATORPARAh4ETERS, PURPOSES OF <br /> WELL SAMPLING. INDICATOR PARAMETERS FOR THEN PROCEED TO MMI, SAMPLING. t <br /> STABILITY. SAMPLING. { <br /> CCppl� **�� FIGURE <br /> Gi C0N MONITORING WELL PURGING PROTOCOL A-1 <br />