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i MONITORING WELL PURGING PROTOCOL <br /> MEASURE AND RECORD DEPTH TO WATER <br /> EMCON AND WELL TOTAL DEPTH <br /> ' CHECK FOR FLOATING PRODUCT <br /> MEASURE AND DOCUMENT— CALCULATE PURGE VOLUME BY <br /> FLOATING PRODUCT THICKNESS. USING THE FOLLOWING EQUATION: <br /> DO NOT SAMPLE WELL FOR ry IP= 71 r Z h x 7.48 x 3 <br /> DISSOLVED CONSTITUENTS. where: # <br /> _ P - calculated purge volume (gallons) <br /> -� 3.14 <br /> 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 /> W <br /> WDRYNESS BEFORE REMOVING MONITORING GROUND-WATER STABILIZATION <br /> OF CALCULATED PURGE VOLUME INDICATOR PARAMETERS (pH, CONDUCTIVITY. <br /> TEMPERATURE)AND TLIRBIDriY AT INTERVALS <br /> 4 OF ONE CASING VOLUME. <br /> NO YES <br /> FINAL TWO SETS OF GROUND-WATER r <br /> STABILIZATION INDICATOR PARAMETER ) x WELL RECHARGES`TO A LEVEL <br /> MEASUREMENTS MEET THE FOLLOWING SUFFICIENT FOR SAMPLE <br /> ' CRITERIA: . . . x ., z f e "f # COLLECTION WITHIN 24 HOURS <br /> PH = _ 0.05 pH units yOF EVACUATION TO DRYNESS. <br /> ':COND. = _ 3% <br /> TEMP. - = <br /> 1.0 OF <br /> TURBIDITY - _ <5 NTU <br /> YES NO <br /> YES NO . <br /> FIELD TEST FIRST RECORD WELL <br /> i CONTINUE PURGING; RECHARGE WATER FOR AS DRY FOR <br /> WELL PURGING INDICATOR PARAMETERS . PURPOSES OF <br /> CRITERIA MET; EVACUATE ADDITIONAL AND TURBIDITY.THEN SAMPLING. <br /> PROCEED TO CASING VOLUME OF PROCEED TO WELL <br /> WELL SAMPLING WATER,'MONITORING SAMPLING. Jr <br /> INDICATOR PARAMETERS <br /> i <br /> FOR STABILITY.- ' <br /> FIGURE <br /> W <br /> r <br /> E - * _,-MONITORING WELL PURGING PROTO <br /> �111C NCOL .�_ . <br />