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MONITORING WELL PURGING PROTOCOL <br /> MEASURE AND RECORD DEPTH TO WATER AND <br /> OWELL TOTAL DEPTH <br /> WT <br /> CHECK FOR FLOATING PRODUCT <br /> YES <br /> NO <br /> MMUMENT FCALCULATE PURGE VOLUME BY <br /> THICKNESS HE FOLLOWING EQUATION <br /> LL FOR P = r' x 7 48 x 3 <br /> UENTS <br /> P=calculated purge volume(gallons) <br /> Tr =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 /> YES <br /> FINAL TWO SETS OF GROUNDWATER 77 <br /> STABILIZATION INDICATOR PARAMETER <br /> MEASUREMENTS MEET THE FOLLOWING <br /> CRITERIA rOF <br /> LL RECHARGES TO A LEVEL <br /> pH = 0 1 pH units FICIENT FOR SAMPLE <br /> COND =± 10% LLECTION WITHIN 24 HOURS <br /> TEMP =t 1 0°F EVACUATION TO DRYNESS <br /> YES NO <br /> =— <br /> WELL <br /> PURGING CONTIMJE PURGING, EVACUATE FIELD TEST IRST RECORD WELL <br /> CRITERIA MET, ADDITIONAL CASING VOLUME RECHARGE WATER FOR <br /> PROCEED TO OF WATER MONITORING AS DRY FOR <br /> INDICATOR PARAMETERS, PURPOSES OF <br /> WELL SAMPLING INDICATOR PARAMETERS FOR THEN PROCEED TO WELL <br /> STABILITY SAMPLING <br /> SAMPLING <br />� EMCON FIGURE <br /> MONITORING WELL PURGING PROTOCOL A-1 <br />