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MONITORING WELL PURGING PROTOCOL <br /> MEASURE AND RECORD DEPTH TO WATER AND <br /> WELL TOTAL DEPTH <br /> ® T <br /> CALCULATE PURGE VOLUME BY <br /> USING THE FOLLOWING EQUATION: <br /> P=nr2hx7A8x3 <br /> where: <br /> P=calculated purge volume(gallons) <br /> =3.14 <br /> r=radius of well casing in feet <br /> h=height of nater column in feet <br /> Ev:ACUATE WATER FROM WELL EQUAL TO <br /> THE CALCULATED PURGE VOLUME WHILE <br /> MONITORING GROUNDWATER <br /> STABILIZATION INDICATOR PARAMETERS <br /> (pH,CONDUCTIVITY,TEMPERATURE)AT <br /> LN7ERVALS OF ONE CASING VOLUME. <br /> RILL EVACUATED TO PRACTICAL LIMITS <br /> OF DRYNESS BEFORE REMOVING <br /> CALCULATED PURGE VOLUME <br /> NO YES <br /> FNAL TWO SETS OF GROUNDWATER <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 /> P <br /> YES NO YES NO <br /> WELL PURGING CONTINUE PLRGING;EVACUATE FIELD TEST FIRST RECORD WELL <br /> ADDITIONAL <br /> CRITERIA MET; L CASING VOLUME RECHARGE WATER FOR AS DRY FOR <br /> ING INDICATOR PARAMETERS, PURPOSES OF <br /> PROCEED TO OF WATER,MOvTIOR <br /> THEN PROCEED TO WELL SAMPLING. <br /> WELL SAMPLING. INDICATOR PARAMETERS FOR <br /> t STABILITY. SAMPLING. <br /> ell FIGURE <br /> E CIL <br /> MONITORING WELL PURGING PROTOCOL <br /> _1 . <br />