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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 � <br /> ' CALCULATE PURGE VOLUME BY <br /> DO NOT SAMPLE WELL USING THE FOLLOWING EQUATION <br /> FOR DISSOLVED P_ n r 2 h x 7 48 x 3 <br /> CONSTITUENTS where <br /> P . calculated purge volume (gallons) <br /> = 314 <br /> r = radius of well casing in feet <br /> h a 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 /> MONITORING GROUND-WATER STABILIZATION <br /> OF DRYNESS BEFORE REMOVING INDICATOR PARAMETERS <br /> CALCULATED PURGE VOLUME (PH, CONDUCTIVITY, TEMPERATURE) <br /> AT INTERVALS OF ONE CASING VOLUME <br /> YES <br /> NO <br /> FINAL TWO SETS OF GROUND-WATER <br /> STABILIZATION INDICATOR PARAMETER WELL RECHARGES TO'A LEVEL <br /> ' MEASUREMENTS MEET THE FOLLOWING SUFFICIENT FOR SAMPLE <br /> CRITERIA COLLECTION WITHIN 24 HOURS <br /> pH = t 0 1 pH unds OF EVACUATION TO DRYNESS <br /> COND = t 0% <br /> ' TEMP - t 1 0 -F <br /> YES � <br /> ' AWELL <br /> NO <br /> CONTINUE PURGING, FIELD TEST FIRST RECORD WELL <br /> GING RECHARGEWATER FOR AS DRY FOR <br /> ET, EVACUATE ADDITIONAL INDICATOR PARAMETERS. PURPOSES OF <br /> PROCEED TO CASING VOLUME IN THEN PROCEED TO WELL SAMPLING <br /> WELL SAMPLING WATER. MONITORING SAMPLING. <br /> INDICATOR PARAMETERS <br /> FOR STABILITY. <br /> FIGURE <br /> EMCON WELL PURGING PROTOCOL B-1 <br /> Associates <br />