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i <br /> 01 <br /> i <br /> MONITORING WELL PURGING PROTOCOL <br /> MEASURE AND RECORD DEPTH TO WATER <br /> AND WELL TOTAL DEPTH <br /> i <br /> CALCULATE PURGE VOLUME BY <br /> USING THE FOLLOWING EQUATION: <br /> P - TlrZhx7.48x4 <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 PRACTIC.�L LIMIT <br /> OF DRYNESS BEFORE REMOVING <br /> CALCULATED PURGE VOLUME <br /> NO <br /> YES <br /> FINAL 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 4.1 pH units COLLECTION WITHIN 24 HOURS <br /> CONO. - t 10% OF EVACUATION TO DRYNESS. <br /> TEMP. ; t 1.0 °F <br /> +YES NO <br /> 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 /> op <br /> • & EMCON 7;IGU <br /> MONITORING WELL PURGING PROTOCOL <br /> Associates <br /> I <br />