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MEASURE AND RECORD DEPTH TO WATER AND <br />WELL TOTAL DEPTH <br />CALCULATE PURGE VOLUME BY <br />USING THE FOLLOWING EQUATION: <br />P=rrr2hx7.48x3 <br />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 />THE CALCULATED PURGE VOLUME WHILE <br />MONITORING GROUNDWATER <br />STABILIZATION INDICATOR PARAMETERS <br />(PH, CONDUCTIVITY, TEMPERATURE) AT <br />INTERVALS OF ONE CASING VOLUME. <br />WELL EVACUATED TO PRACTICAL LIMITS <br />OF DRYNESS BEFORE REMOVING <br />CALCULATED PURGE VOLUME <br />FINAL TWO SETS OF GROUNDWATER <br />STABILIZATION INDICATOR PARAMETER <br />MEASUREMENTS MEET THE FOLLOWING <br />CRITERIA: <br />PH = 10.1 PH units <br />COND. =f 10 % <br />TEMP. _1 1.0 °F <br />YES <br />WELL PURGING <br />CRITERIA MET; <br />PROCEED TO <br />WELL SAMPLING: <br />NO <br />CONTINUE PURGING; EVACUATE <br />ADDITIONAL CASING VOLUME <br />OF WATER, MONITORING <br />INDICATOR PARAMETERS FOR <br />STABILITY. <br />I YES I <br />WELL RECHARGES TO A LEVEL <br />SUFFICIENT FOR SAMPLE <br />COLLECTION WITHIN 24 HOURS <br />OF EVACUATION TO DRYNESS. <br />I YES I <br />TEST FIRST <br />ARGE WATER FOR <br />ATOR PARAMETERS <br />PROCEED TO WELL <br />MONITORING WELL PURGING PROTOCOL <br />NO <br />"—ORD WELL <br />DRY FOR <br />ZPOSES OF <br />