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x <br /> MONITORING WELL PURGING PROTOCOL <br /> EMCON MEASURE AND RECORD DEPTH TO WATER <br /> ASSOCIATES AND WELL TOTAL DEPTH <br /> CHECK FOR FLOATING PRODUCT <br /> _17— <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 /> IT - 314 <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 LIMIT THE CALCULATED PURGE VOLUME WHILE <br /> OF DRYNESS BEFORE REMOVING MONITORING GROUND-WATER STABILIZATION <br /> CALCULATED PURGE VOLUME INDICATOR PARAMETERS(pH, CONDUCTIVITY, <br /> TEMPERATURE)AND TURBIDITY AT INTERVALS <br /> OF ONE CASING VOLUME <br /> NO YES <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 units OF EVACUATION TO DRYNESS <br /> COND = t 10 <br /> TEMP = t 1 0 °F <br /> E46YES NO <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 /> EMCON FlGl7RE <br /> MONITORING WELL PURGING PROTOCOL „ w1 <br /> Associates <br />