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4 <br /> 11 <br /> MONITORING WELL PUGING PROTOCOL <br /> MEASURE AND RECORD DEPTH TO WATER AND <br /> Ua WELL TOTAL DEPTH <br /> O T <br /> CALCULATE PURGE VOLUME BY <br /> USING THE FOLLOWING EQUATION: <br /> P=ic eh x 7.48 x 3 i <br /> where: 1 <br /> P=calculated purge volume(gallons) <br /> n=3.14 <br /> T=radius of well casing in fest <br /> h=height of water column in feet <br /> EVACUATE WATER FROM WELL EQUAL TO <br /> THE CALCULATED PURGE VOLUME'%VHILE <br /> MONITORING GROUNDWATER <br /> STABILIZATION INDICATOR PARAMETERS <br /> (pH,CONDUCTIVITY,TEMPERATURE)AT <br /> INTERVALS OF ONE CASING VOLUME. 1 <br /> WELL EVACUATED TO PRACTICAL LIMITS f <br /> OF DRYNESS BEFORE REMOVING <br /> CALCULATED PURGE VOLUME Ii <br /> I <br /> VNO YES <br /> FINAL TWO SETS OF GROUNDWATER <br /> STABILIZATION INDICATOR PARAMETER <br /> MEASUREMENTS N EET THE FOLLOWING { <br /> CRITERIA: WELL RECHARGES TO A LEVEL <br /> pH =:h 4.1 pH units SUFFICIENT FOR SAMPLE <br /> COND. =:h 10% COLLECTION WITHIN 24 HOURS <br /> TEMP. =f 1.0 OF OF EVACUATION TO DRYNESS. i <br /> "PURGINGC0NMTUflq1TLM <br /> YES NO <br /> i <br /> WELURGING;EVACUATE FIELD TEST FIRST RECORD WELL <br /> CRITERIA MET; ADDITIONAL CASING VOLUME RECHARGE WATER FOR AS DRY FOR <br /> PROCEED TO OF WATER,MONITORING INDICATORPARAMETERS, PURPOSES OF <br /> WELL SAMPLING. DIDICATOR PARAMETERS FOR THEN PROCEED TO VELI. SAMPLING. j <br /> STABILITY. SAMPLING. <br /> ;GURE <br /> ][: <br /> MONITORING WELL PURGING PROTOCOL ' <br />