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1 <br /> 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 = Tir2hx7.48x4 <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 /> NO 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 = t 0.1 pH units COLLECTION WITHIN 24 HOURS <br /> COND. = t 10% OF EVACUATION TO DRYNESS. <br /> TEMP. = f 1.0 OF <br />' YE5 NO <br /> YE5 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 <br /> INDICATOR PARAMETERS, PURPOSES OF WELL SAMPLING WATER, MONITORING THEN PROCEED TO WELL SAMPLING. <br /> SAMPLING. <br /> INDICATOR PARAMETERS <br /> FOR STABILITY. <br /> FIGUREE M C O N MONITORING WELL PURGING PROTOCOL C=1 <br /> Associates <br />