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1/ <br /> MONITORING WELL PURGING PROTOCOL <br /> MEASURE AND RECORD DEPTH TO WATER AND <br /> WELL TOTAL DEPTH <br /> CHECK FOR FLOATING PRODUCT <br /> YES NO <br /> I <br /> MEASURE AND DOCUMENT CALCULATE PURGE VOLUME BY <br /> FLOATING PRODUCT THICKNESS USING THE FOLLOWING EQUATION <br /> DO NOT SAMPLE WELL FOR P= n r2h x 7 48 x 3 <br /> DISSOLVED CONSTITUENTS where <br /> P= calculated purge volume (gallons) <br /> 7t = 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 THE CALCULATED PURGE VOLUME WHILE <br /> MONITORING GROUNDWATER <br /> OF DRYNESS BEFORE REMOVING STABILIZATION INDICATOR PARAMETERS <br /> CALCULATED PURGE VOLUME (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 /> GOND =± 10%v COLLECTION WITHIN 24 HOURS <br /> TEMP =± 100F OF EVACUATION TO DRYNESS <br /> YES NO YES NO <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 /> FIGURE <br /> INTERNATIONAL. �- <br /> TECHNOLOGY MONITORING WELL PURGING PROTOCOL <br /> CORPORATION <br />