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�1 MONITORING WELL PURGING PROTOCOL <br /> JMEASURE AND RECORD DEPTH TO WAT ER AND <br /> WELL TOTAL DEPTH <br /> OWT <br /> CHECK FOR FLOATING PRODUCT <br /> YES NO <br /> MEASURE AND DOCUMENT CALCULATE PURGE VOLUME BY <br /> FLOATING PRODUCT THICKNESS USING THE FOLLOWING EQUATION <br /> DO NOT SAMPLE WELL FOR P= 7c rzh x 7 48 x 3 <br /> DISSOLVED CONSTITUENTS where <br /> P= calculated purge volume (gallons) <br /> a=314 <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 TIM 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 .YES <br /> FINAL TWO SETS OF GROUNDWATER <br /> STABILIZATION INDICATOR PARAMETER <br /> MEASUREMENTS MEET THE FOLLOWING <br /> CRITERIA WELL RECHARGES TO A LEVEL <br /> PH =±0 1 pH units SUFFICIENT FOR SAMPLE <br /> COND = ± 10 % COLLECTION WITHIN 24 HOURS <br /> TEMP = ± 10 OF OF EVACUATION TO DRYNESS <br /> YES a <br /> YES NO <br /> 7- -: —] — <br /> WELL PURGING CONTINUE PURGING,EVACUATE FIELD TEST FIRST RECORD WELL <br /> CRITERIA MET, ADDITIONAL CASING VOLUME RECHARGE WATER FOR AS DRY FOR <br /> PROCEED TO OF WATER, MONITORING INDICATOR PARAMETERS, PURPOSES OF <br /> WELL SAMPLING INDICATOR PARAMETERS FOR THEN PROCEED TO WELL SAMPLING <br /> STABILITY SAMPLING <br /> R FIGURE <br /> EMMONITORING WELL PURGING PROTOCOL IGU1 <br />