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77 MONITORING WELL PURGING PROTOCOL <br /> ENCON MEASURE AND RECORD DEPTH TO WATER <br /> ASSOCIATES AND WELL TOTAL DEPTH <br /> CHECK FOR FLOATING PRODUCT <br /> YES NO <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. where: <br /> P = calculated purge volume(gallons) <br /> TF - 3.14 <br /> r - radius of we4i casing in feet <br /> h - height of waiter Column :n 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 /> • I , <br /> NO 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 /> pH y t 0.1 pH units OF EVACUATION TO DRYNESS. <br /> COND. t 10% <br /> TEMP 10 "F <br /> YES NO <br /> I i YE5 MO <br /> FIELD TEST FIRST RECORD WELL <br /> WELL PURGING CONTINUE PURGING: RECHARGE WATER FOR AS DRY FOR <br /> CRITERIA MET; EVACUATE ADDITIONAL INDICATOR PARAMETERS PURPOSES OF <br /> PROCEED TO CASING VOLUME OF AND TURBIDITY.THEN SAMPLING. <br /> WELL SAMPLING WAFER, MONITORING PROCEED TD WELL <br /> INDICATOR PARAMETERS SAMPLING. <br /> FOR STABILITY <br /> I <br /> RE <br /> EMCON M <br /> Associates MW1TOIIIN°WELL PURGING PROTOCOL Awl <br />