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.r <br /> MONITORING WELL PURGING PROTOCOL <br /> MEASURE AND RECORD DEPTH TO WATER AND <br /> WELL TOTAL DEPTH <br /> rWT <br /> =CHECK FOR FLOATING PRODUCT <br /> YES <br /> 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 rz x 7.48 x 3 <br /> DISSOLVED CONSTITUENTS. where: <br /> P =calculated purge volume (gallons) <br /> 71 =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 /> WELT.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 /> YES <br /> fNAL TWO SETS OF GROUNDWATER <br /> T'ABILIZATION INDICATOR PARAMETER <br /> iEASUREMENTS MEET THE FOLLOWING <br /> RITERIA: <br /> WELL RECHARGES TO A LEVEL <br /> pH = 0.1 pH units SUFFICIENT FOR SAMPLE <br /> COND. =t 10 % COLLECTION WITHIN 24 HOURS <br /> TEMP _} 1 of <br /> OFF TO DRYNESS. <br /> YES NO <br /> YES NO <br /> WELL PURGING CONTINUE PURGING, EVACUATE FIELD TEST FIRST <br /> CRITERIA MET, ADDITIONAL CASING VOLUME RECHARGE WATER FOR RECORD WELL <br /> PROCEED TO OF WATER. MONITORING AS DAY FOR <br /> INDICATOR PARAMETERS, PURPOSES OF <br /> WELL SAMPLING. INDICATOR PARAMETERS FOR THEN PROCEED TO WELL <br /> STABILITY. SAMPLING. <br /> SAMPLING. <br />� E M c o ru FIGURE <br /> MONITORING WELL PURGING PROTOCOL A�� <br />