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i <br /> MONITORING WELL PURGING PROTOCOL <br /> EMCON MEASURE AND RECORD DEPTH TO WATER <br /> ASgoo 1ATEs AND WELL TOTAL DEPTH <br /> CHECK FOR FLOATING PRODUCT <br /> YES <br /> E7 <br /> MEASURE AND DOCUMENT CALCULATE PURGE VOLUME BY <br /> FLOATING PRODUCT THICKNESS, USING THE FOLLOWING EQUATION: <br /> DO NOT SAMPLE WELL FOR P.- n r 2 h x 7 48 x 3 <br /> DISSOLVED CONSTITUENTS. <br /> where: <br /> P - calculated Purge volume(gallons) <br /> TT - 3.14 <br /> r - radius of wed casing in feet <br /> h - height of water cotumn in feet <br /> EVACUATE WATER FROM WELL EQUAL TO <br /> WELL EVACUATED TO PRACTICAL LIMIT THE CALCULATED PURGE VOLUME WHILE <br /> OF DRYNESS BEFORE REMOVING MONITORING GROUND-WATER STABILIZATION <br /> CALCULATED PURGE VOLUME INDICATOR PARAMETERS(pH. CONDUCTIVITY, <br /> • TEMPERATURE)AND TURBIDITY AT INTERVALS <br /> OF ONE CASING VOLUME. <br /> L NO <br /> YES <br /> FINAL TWO SETS OF GROUND-WATER <br /> STABILIZATION INDICATOR PARAMETER WELL RECHARGES TO A LEVEL <br /> MEASUREMENTS MEET THE FOLLOWING SUFFICIENT FOR SAMPLE <br /> CRITERIA, COLLECTION WITHIN 24 HOURS <br /> COND.PI I ' t 10 pH units COLLECTION <br /> EVACUATION TO DRYNESS. <br /> t 109', <br /> TEMP 3 1 0 °F <br /> YES NO <br /> E <br /> I,IO <br /> -- : : <br /> FIELD TEST FIRST RECORD WELL <br /> WELL PURGING 7EVACUATE <br /> PURGING, RECHARGE WATER FOR AS DRY FOR <br /> CRITERIA MET, ADDITIONAL INDICATOR PARAMETERS PURPOSES OF <br /> PROCEED TQ OLUME OF AND TURBIDITY.THEASAMPLIN3WELL SAMPLING ONITORING PROCEED TO WELL <br /> INDICATOR PARAMETERS SAMPLING. <br /> FOR STABILITY. <br /> • FIGURE <br /> EMCON <br /> Associates MONITOp1NG WELL PURGWt3 P1aOTDCOL A <br />