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MONITORING WELL PURGING PROTOCOL <br /> EMCON MEASURE AND RECORD DEPTH TO WATER <br /> .ssocuTE' AND WELL TOTAL DEPTH <br /> CHECK FOR FLOATING PRODUCT <br /> YES NO <br /> MEASURE AND DOCUMENT CALCULATE PURGE VOLUME BY <br /> FLOATING PRODUCT THICKNESS. USING THE FOLLOWING EQUATION, <br /> DO NOT SAMPLE WELL FOR P . -T r 2 h x 7 48 x 3 <br /> DISSOLVED CONSTITUENTS. where <br /> P = calcutated purge volume (gallons) <br /> TT - 314 <br /> r = radius ct well casing in feet <br /> h = height ct water cawmn in feet <br /> EVACUATE WATER FROM WELL EQUAL TO <br /> WELL =JACUATED TO PRACTICAL LIMITS THE CALCULATED PURGE VOLUME WHILE <br /> OF DRYNESS BEFORE REMOVING MONITORING GROUND-WATER STABILIZATION <br /> CALCULATED PURGE VOLUME INDICATOR PARAMETERS(pH, CONDUCTMTY. <br /> TEMPERATURE) AND TURBIDFTY AT INTERVALS <br /> OF ONE CASING VOLUME <br /> L NO <br /> YES <br /> V-- <br /> FINAL TWO SETS OF GROUND-WATER <br /> STABILIZATION INDICATOR PARAMETER WELL RECHARGES TO A LEVEL <br /> MEASURE-%!ENTS MEET THE FOLLOWING SUFFICIENT FOR SAMPLE <br /> CRITERIA COLLECTION WITHIN 24 HOURS <br /> pH = t 0 1 pH units OF EVACUATION TO DRYNESS. <br /> COND = t 10% <br /> TEMP = + 1 0 "F <br /> YES i <br /> YES ' <br /> a - a <br /> FIELD TEST F3RST RECORD WELL <br /> WELL PURGING CONTINUE PURGING, RECHARGE WATER FOR AS DRY FOR <br /> CRITERIA MET. EVACUATE ADDITIONAL INDICATOR PARAMETERS PURPOSES OF <br /> PROCEED TO CASING VOLUME OF j AND TURBIDITY THEN SAMPLIN[L <br /> WELL SAMPLING WATER. MONFTORING PROCEED TO WELL <br /> INDICATOR PARAMETERS SAMPLING <br /> FOR STABILITY <br /> EMCON FIGURE <br /> Associates MONITORING WELL PURGING PROTOCOL A801 <br />