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MONITORING WELL PURGING PROTOCOL <br /> MEASURE AND RECORD DEPTH TO WATER 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 = n r2 x 7 48 x3 <br /> DISSOLVED CONSTITUENTS where <br /> P= calculated purge volume({gallons) <br /> n = 314 <br /> r= radius of well casing in feet <br /> h =height of water column in Leet <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 YES <br /> I ]NAL I\kO SL I S 01 VROUNDWA I LR <br /> STABILIZATION INDICATOR PARAMETER <br /> MEASUREMENTS MEET THE FOLLOWING + <br /> CRI FERIA WELL RECHARGES TO A LEVEL <br /> pH = - 0 1 pH units SUFFICIENT FOR SAMPLE <br /> COND = ± 10% COLLECTION WITHIN 24 HOURS <br /> TEMP - t 1 0 °F OF EVACUATION TO DRYNESS l <br /> YES NO YES NO <br /> E <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 /> 10 FIGURE <br /> EMCON MONITORING WELL PURGING PROTOCOL A-1 r <br /> �J <br />