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MONITORING WELL PURGING PROTOCOL <br /> MEASURE AND RECORD DEPTH TO WATER AND <br /> WELL TOTAL DEPTH <br /> *VT <br /> CHECK FOR FLOATING PRODUCT <br /> YES <br /> NO <br /> FMEASURE AND DOCUMENT FCALCULATE PURGE VOLUME BYTING PRODUCT THICKNESS G THE FOLLOWING EQUATION <br /> OT SAMPLE WELL FOR P = n r' x 7 4$ x 3 <br /> DISSOLVED CONSTITUENTS where <br /> P =calculated purge volume (gallons) <br /> 7r = 3 14 <br /> r=radius of well casing in feet <br /> h = height of water column in feet <br /> EVACUATE WATER FROM WELL EQUAL TO <br /> WELL EVACUATED TO PRACTICAL LIMITS THE CALCULATED PURGE VOLUME WHILE <br /> OF DRYNESS BEFORE REMOVING MONITORING GROUNDWATER <br /> CALCULATED PURGE VOLUME STABILIZATION INDICATOR PARAMETERS <br /> (pH, CONDUCTIVITY, TEMPERATURE)AT <br /> INTERVALS OF ONE CASING VOLUME <br /> • NO <br /> YES <br /> NAL TWO SETS OF GROUNDWATER <br />-ABILIZATION INDICATOR PARAMETER <br /> EASUREMENTS MEET THE FOLLOWING <br /> uTERIA WELL RECHARGES TO A LEVEL <br /> COND =± 10 %pH =± I pH units SUFFICIENT FOR SAMPLE <br /> I <br /> TEMP =:t 1 0 OF COLLECTION WITHIN 24 HOURS <br /> OF EVACUATION TO DRYNESS <br /> YES NO <br /> YES NO <br /> WELL PURGING CONTINUE PURGING EVACUATE FIELD TEST FIRST <br /> CRITERIA MET, ADDITIONAL CASING VOLUME RECHARGE WATER FOR CORD WELL <br /> PROCEED TO OF WATER INDICATOR PARAMETERS, PURPOSES MONITORING DRY FOR <br /> OF <br /> WELL SAMPLING INDICATOR PARAMETERS FOR THEN PROCEED TO WELL <br /> STABILITY SAMPLING <br /> SAMPLING <br /> CnA�OAr FIGURE <br /> EMCON MONITORING WELL PURGING PROTOCOL A.�'� <br />