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�1 MONITORING WELL PURGING PROTOCOL <br /> �J MEASURE AND RECORD DEPTH TO WATER AND <br /> WELL TOTAL DEPTH <br /> OWT <br /> CHECK FOR FLOATING PRODUCT <br /> YES <br /> EA1 <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 /> iz =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 /> 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 <br /> i 44 <br /> YES <br /> FINAL TWO SETS OF GROUNDWATER <br /> STABILIZATION INDICATOR PARAMETER <br /> MEASUREMENTS MEET THE FOLLOWING <br /> CRITERIA: <br /> 10 pH units WELL RECHARGES TO A LEVEL <br /> pH =f SUFFICIENT FOR SAMPLE <br /> GOND. =t 1 "/° COLLECTION WITHIN 24 HOURS <br /> TEMP. _ I..0 °F OF EVACUATION TO DRYNESS. <br /> YES NO <br /> i <br /> i <br /> I :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 <br /> SAMPLING. <br /> STABILITY. <br /> SAMPLING. <br /> C FIGURE <br /> EMCON MONITORING WELL PURGING PROTOCOL <br /> �J A-1 <br />