Laserfiche WebLink
MONITORING WELL PURGING PROTOCOL <br /> MEASURE AND RIPCORD DEPTH TO WATER AND <br /> WELL TOTAL DEPTH <br /> OWT <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'x 7 48 x3 <br /> DISSOLVED CONSTITUENTS where <br /> P=calculated purge volume(gallons) <br /> n= 314 <br /> r=radius of well casing to feet <br /> h =he«ht of water column to feet <br /> EVACUATE WATER FROM WELL EQUAL TO <br /> WELL EVACUATED TO PRACTICAL LIMITS THE CALCULATED PURGE VOLUME WHILE <br /> OF DRYNESS BEFORE REMOVING MONITORING GROUNDWATER <br /> STABILIZATION INDICATOR PARAMETERS <br /> CALCULATED PURGE VOLUME (pH,CONDUCTIVITY,TEMPERATURE)AT <br /> INTERVALS OF ONE CASING VOLUME <br /> NO YES <br /> FINAL TWO SETS OF GROUNDWATER <br /> STABILIZATION INDICATOR PARAMETER <br /> MEASUREMENTS MEET THE FOLLOWING <br /> CRITERIA WELL RECHARGES TO A LEVEL <br /> ISH =-L 0 1 pH units SUFFICIENT FOR SAMPLE <br /> COND = 10 % COLLECTION WITHIN 24 HOURS <br /> TEMP = l 0 °F OF EVACUATION TO DRYNESS <br /> YES NO YES NO <br /> _E; <br /> WELL PURGING CONTINUE PURGING, EVACUATE FIELD TEST FIRST RECORD WELL <br /> CRITERIA MET, ADDITIONAL CASING VOLUME RECHARGE WATER FOR AS DRY FOR <br /> PROCEED TO OF WATER. MONITORING INDICATOR PARAMETERS, PURPOSES OF <br /> WELL SAMPLING INDICATOR PARAMETERS FOR THEN PROCEED TO WELL SAMPLING <br /> STABILITY SAMPLING <br /> FIGURE <br /> EMCON MONITORING WELL. PURGING PROTOCOL Hw1 <br />