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MONITORING WELL PURGING PROTOCOL <br /> EMCON MEASURE AND RECORD DEPTH TO WATER <br /> ' ASSOCIATES AND WELL TOTAL DEPTH <br /> MEASURE FOR FLOATING PRODUCT <br /> ' YES Np <br /> CALCULATE PURGE VOLUME BY <br /> ' DO NOT SAMPLE WELL USING THE FOLLOWING EQUATION: <br /> FOR DISSOLVED <br /> CONSTITUENTS. P- Ti r 2 h x 7.4$x 3 <br /> where: <br /> P = calculated purge volume (gallons) <br /> TT = 3.14 <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 <br /> (pH, CONDUCTIVITY, TEMPERATURE) <br /> AT INTERVALS OF ONE CASING VOLUME. <br /> FFINAL <br /> YES <br />' WOSETS OF GROUND-WATER <br /> STABILIZATION INDICATOR PARAMETER <br /> MEASUREMENTS MEET THE FOLLOWING WELL RECHARGES TO A LEVEL <br /> CRITERIA: SUFFICIENT FOR SAMPLE <br />' pH = t 0.1 pH units COLLECTION WITHIN 24 HOURS <br /> GOND. = f 10% OF EVACUATION TO DRYNESS. <br /> TEMP. = t 1.0 IF <br /> YES NO <br /> YES NO <br />' WELL PURGING CONTINUE PURGING; FIELD TEST FIRST RECORD WELL <br /> CRITERIA MET; EVACUATE ADDITIONAL RECHARGE WATER FOR AS DRY FOR <br /> PROCEED TO CASING VOLUME OF INDICATOR PARAMETERS, PURPOSES OF <br />' WELL SAMPLING WATER, MONITORING THEN PROCEED TO WELL SAMPLING. <br /> INDICATOR PARAMETERS SAMPLING. <br /> FOR STABILITY. <br /> FIGURE <br /> EMCON <br /> Associates WELL PURGING PROTOCOL ID-1 <br />