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MONITORING WELL PURGING PROTOCOL <br /> EMCON MEASURE AND RECORD DEPTH TO WATER <br /> ASSOCIATES AND WELL TOTAL DEPTH <br /> CHECK FOR FLOATING PRODUCT <br /> YES NO <br /> CALCULATE PURGE VOLUME BY <br /> DO NOT SAMPLE WELL USING THE FOLLOWING EQUATION <br /> FOR DISSOLVED P : rt r 2 h x 7 48 x 3 <br /> CONSTITUENTS <br /> where <br /> P - calculated purge volume (gallons) <br /> = 314 <br /> r 3 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 LIMIT THE CALCULATED PURGE VOLUME WHILE <br /> OF DRYNESS BEFORE REMOVING MONITORING GROUND-WATER STABILIZATION <br /> CALCULATED PURGE VOLUME INDICATOR PARAMETERS <br /> (pH, CONDUCTIVITY, TEMPERATURE) <br /> AT INTERVALS OF ONE CASING VOLUME <br /> �:NO YES <br /> FINAL TWO SETS OF GROUND-WATER _ <br /> STABILIZATION INDICATOR PARAMETER <br /> MEASUREMENTS MEET THE FOLLOWING WELL RECHARGES TO A LEVEL <br /> CRITERIA SUFFICIENT FOR SAMPLE <br /> pH t 0 1 pH units <br /> WITHIN 24 HOURS <br /> COND = t 10% OF EVACUATION TO DRYNESS <br /> TEMP u t 1 Q O <br /> YE5 NO <br /> E <br /> E5 <br /> WELL PURGING CONTINUE PURGING, FIELD TEST FIRST RECORD WELL <br /> CRITERIA MET, EVACUATE ADDITIONAL RECHARGE WATER FOR AS DRY FOR <br /> PROCEED TO CASING VOLUME OF INDICATOR PARAMETERS, PURPOSES OF <br /> WELL SAMPLING WATER, MONRORING THEN PROCEED TO WELL SAMPLING <br /> INDICATOR PARAMETERS SAMPLING. <br /> FOR STABILITY <br /> 6, FlGURE <br /> ENICON WELL PURGING PROTOCOL <br /> Associates B-1 <br />