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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 /> MEASURE AND DOCUMENT CALCULATE PURGE VOLUME BY <br /> FLOATING PRODUCT THICKNESS USING THE FOLLOWING EQUATION <br /> DO NOT SAMPLE WELL FOR P. n r 2 h x 7 48 x 3 <br /> DISSOLVED CONSTITUENTS where <br /> P = calculated purge volume (gallons) <br /> n = 314 <br /> r = radius of well casing in feet <br /> h = height of water column in feet <br /> EVACUATE WATER FROM WELL EGIUAL TO <br /> WELL EVACUATED TO PRACTICAL LIMIT <br /> THE CALCULATED PURGE VOLUME WHILE <br /> W DRYNESS BEFORE REMOVING MONITORING GROUND-WATER STABILIZATION <br /> CALCULATED PURGE VOLUME INDICATOR PARAMETERS(PH, CONDUCTIVITY, <br /> TEMPERATURE)AND TURBIDITY AT INTERVALS <br /> kNOOF ONE CASING VOLUME <br /> YE5 <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 = f 0 1 PH units OF EVACUATION TO DRYNESS <br /> COND = t 10% <br /> TEMP = t 1 0 °F <br /> YES NO <br /> YES <br /> 4_1 <br /> FIELD TEST FIRST 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 AND TURBIDITY,THEN SAMPLING <br /> WELL SAMPLING WATER, MONITORING PROCEED TO WELL <br /> INDICATOR PARAMETERS SAMPLING <br /> FOR STABILITY <br /> FIGURE <br /> EMCON <br /> MONITORING WELL PURGING PROTOCOL [A.-1 <br /> Associates <br />