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MONITORING WELL PURGING PROTOCOL <br /> EMCON MEASURE AND RECORD DEPTH TO WATER <br /> .ssoc«rts AND WELL TOTAL DEPTH <br /> CHECK FOR FLOATING PRODUCT <br /> YES <br /> F NO <br /> r CALCULATE PURGE VOLUME BY <br /> DO NOT SAMPLE WELL USING THE FOLLOWING EQUATION <br /> FOR DISSOLVED P . 17 r 2 h x 7 48 x 3 <br /> CONSTITUENTS <br /> where <br /> P - calculated purge volume (gallons) <br /> 17 - 314 <br /> r - radius of well casing in feet <br /> h - height of water column in feet <br /> EVACUATE WATER FROM WELL EOUAL TO <br /> WELL EVACUATED TO PRACTICAL LIMIT THE CALCULATED PURGE VOLUME WHILE <br /> OF DRYNESS BEFORE REMOVING MONITORING GROUNDWATER STABILIZATION <br /> CALCULATED PURGE VOLUME INDICATOR PARAMETERS <br /> (pH, CONDUCTIVITY, TEMPERATURE) <br /> AT INTERVALS OF ONE CASING VOLUME <br /> C NO <br /> YES <br /> :�- <br /> FINAL TWO SETS OF GROUND-WATER _ <br /> STABILIZATION INDICATOR PARAMETER WELL RECHARGES TO A LEVEL <br /> r MEASUREMENTS MEET THE FOLLOWING <br /> CRITERIA SUFFICIENT FOR SAMPLE <br /> pH t 0 1 pH units <br /> WITHIN 24 HOURS <br /> COND - t 10 % OF EVACUATION TO DRYNESS <br /> TEMP t 1 0 OF <br /> YES NO <br /> YES PIO <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 /> fINDICATOR PARAMETERS SAMPLING. <br /> t FOR STABILITY <br /> FIGURE <br /> � E M C O N WELL PURGING PROTOCOL <br /> I <br /> AssaCiates B=1 <br />