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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 /> MEASURE AND DOCUMENT CALCULATE PURGE VOLUME BY <br /> FLOATING PRODUCT THICKNESS USING THE FOLLOWING EQUATION <br /> DO NOT SAMPLE WELL FOR P = n r2 x 7 48 x 3 <br /> DISSOLVED CONSTITUENTS where <br /> P= calculated purge volume(gallons) <br /> n = 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 /> MWELLVACUATED TO PRACTICAL LIMITS THE CALCULATED PURGE VOLUME WHILE <br /> DRYNESS BEFORE REMOVING MONITORING GROUNDWATER <br /> LCULATED 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 /> SASUREMENTS MEET THE FOLLOWING <br />;ITERIA <br /> WELL RECHARGES TO A LEVEL <br /> pH =±0 I pH units <br /> COND = l0 <br /> SUFFICIENT FOR SAMPLE <br /> � <br /> TEMP =f 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_ MONITORING PURPOSES <br /> DRY FOR <br /> INDICATOR PARAMETERS, PURPOSES OF <br /> WELL SAMPLING INDICATOR PARAMETERS FOR THEN PROCEED TO WELL <br /> STABILITY SAMPLING <br /> SAMPLING <br /> G'y] <br /> C n �C O N FIGURE <br /> 1V MONITORING WELL PURGING PROTOCOL A-1 <br />