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40 MONITORING WELL PURGING PROTOCOL <br /> MEASURE AND RECORD DEPTH TO WATER AND <br /> WELL TOTAL DEPTH <br /> VITT <br /> CHECK FOR FLOATING PRODUCT Ei <br /> YES <br /> NO <br /> FDISSOLVED <br /> ND DOCUMENT CALCULATE PURGE VOLUME BY <br /> PRODUCT THICKNESS USING THE FOLLOWING EQUATION <br /> MPLE WELL FOR P = 7T r2 x 7 48 x 3 <br /> CONSTITUENTS where <br /> P=calculated purge volume (gallons) <br /> n =3 I4 <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 /> YES <br /> FINAL TWO SETS OF GROUNDWATER <br /> STABILIZATION INDICATOR PARAMETER <br /> AEASUREMENTS MEET THE FOLLOWING <br /> UTERIA <br /> pH =± 0 1 pH units WELL RECHARGES TO A LEVEL <br /> COND =± 10% SUFFICIENT FOR SAMPLE <br /> TEMP =t 1 0 OF COLLECTION WITHIN 24 HOURS <br /> OF EVACUATION 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 INDICATOR PARAMETERS AS DRY FOR <br /> WELL SAMPLING INDICATOR PARntvIETrRS FOR THEN PROCEED TO WELL P[_ POSES OF <br /> STABILITY SAMPLMG SAMPLING <br /> EMCON FIGURE <br /> MONITORING WELL PURGING PROTOCOL ��♦ <br /> r <br />