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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 = TI r2hx748x4 <br /> where- <br /> P =calculated purge volume (gallons) <br /> n -314 <br /> r a 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 GROUNDWATER 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 = t 1 0 OF <br /> YES NO <br /> YES 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 INDICATOR PARAMETERS, PURPOSES OF <br /> WELL SAMPLING WATER, MONITORING THEN PROCEED TO WELL SAMPLING <br /> INDICATOR PARAMETERS SAMPLING <br /> FOR STABILITY <br /> • EMC0NFlGURE <br /> MONITORING WELL PURGING PROTOCOL /� <br /> Associates A <br />