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MONITORING WELL PURGING PROTOCOL <br /> MEASURE AND RECORD DEPTH TO WATER <br /> AND WELL TOTAL DEPTH <br />' CALCULATE PURGE VOLUME BY <br /> USING THE FOLLOWING EQUATION: <br />' P = IT r2hx7.48x4 <br /> where: <br /> P = calculated purge volume (gallons) <br /> n = 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 /> THE CALCULATED PURGE VOLUME WHILE <br /> MONITORING GROUND-WATER STABILIZATION <br />' INDICATOR PARAMETERS <br /> (pH, CONDUCTIVITY, TEMPERATURE) <br /> AT INTERVALS OF ONE CASING VOLUME. <br />' WELL EVACUATED TO PRACTICAL LIMIT <br /> OF DRYNESS BEFORE REMOVING <br /> CALCULATED PURGE VOLUME <br />' <br /> ANO YES <br /> FINAL TWO SETS OF GROUND-WATER <br /> STABILIZATION INDICATOR PARAMETER <br /> MEASUREMENTS MEET THE FOLLOWING WELL RECHARGES TO A LEVEL <br />' CRITERIA: SUFFICIENT FOR SAMPLE <br /> PH = f 0.1 pH units COLLECTION WITHIN 24 HOURS <br /> COND. = f 10 % OF EVACUATION TO DRYNESS. <br /> TEMP. = t 1.0 °F <br /> YES <br /> YES NO NO <br /> 1 WELL PURGING CONTINUE PURGING; FIELD TEST FIRST RECORD WELL <br /> RECHARGE WATER FOR AS DRY FOR <br /> EVACUATE ADDITIONAL <br /> CRITERIA MET;' <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 /> 1 <br /> FIGURE <br /> E M6� C O N MONITORING WELL PURGING PROTOCOL A-1 <br /> Associates <br />