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�y...ai --.. sf 9 - S. - <br /> F <br /> t <br /> �''� 1�('Co(ltafnlnatlOfl <br /> s8 Prior to cosnmenc:ing san:plinl; nr pufl,ing, all haiters, pumps, tubing, cables, and lines will be <br /> decontaminated. Decontamination will include IriSOCUUm phosphate wash, tap water rinse, and <br /> dcionizecl water final rinse. A hailur blank %will be taken after initial decotntamination is <br /> performed. 'flit:bailer bhlnk is obtained by filling the bailer with deionized water and transferring <br /> the water intra appropriate containers. -,Ile sample is to be labelled"Bailer Blank"and"Hold"is <br /> to be indicated in the analysis sections of the ]--,be] and the Chain-of-Custody record. All <br /> equipment will be thoroughly decontaminated after sampling cath well. <br /> 4 <br /> f Gauging <br /> jThe water level in each well will he gauged prior to purging. on oillwater interfact probe will <br /> b. sed to determine the depth to water, dcptll to product, and total well depth. The data <br /> d collected will be recorded on the Groundwater Monitoring Data form. 'Ile interface probe and <br /> lace will be decontaminated prior to gauging each well. <br /> t � <br /> t : Purging <br /> The well will be bailed or punpcd to remove at least three well easing volumes prior to sampling <br /> # ' or until the pH, temperature, and conductivity have s(abilized. "Stabilized" is defined as three <br /> ' conductivity will <br /> consecutive readings within 15 percent of one another. Temperature,pH, and <br /> be measured with field instruments after cath well casing volume is removed. The data will be <br /> recorded on Purge Data form. A casing volume will be based on actual measurements made on <br /> the day of sampling. 11 the well is purged dry before three well easing volumes are removed, the <br /> sample will be taken when the water level in the well recovers to So percent of its initial water <br /> level. If the length of time for the well to recover 80 percent of its initial water level exceeds two <br /> hours, the sample will be obtained as soon as sufficient volume is available. All water purged <br /> from the well will he placed in labelled, 55-gallon, closed-top drums. <br /> Sampling <br /> - quired volume from the.well,the sample will be obtained with a <br /> !:allowing the removal of the re <br /> on the Chain-of-Custody record <br /> clean, teflon or stainless steel bailer. All samples will be logged <br /> form. Samples will be placed in Appropriate containers provided by the laboratory. Labels <br /> specifying project n:ulne, project number, date, sample identification, sample, and analytical <br /> parameters will be affixed to each safrtple container. The samples will be placed in a cooler with <br /> dry or blue ice for delivery to line analytical laboratory. <br /> 3.5 Sampling Schedule <br /> ...._... - - <br /> _.... ry._ <br /> 1'cnadic sampling of the ifioriiforkiiG wells may become necessary.-Sampling will be addressed In . <br /> the remedial action plan which will be prepared after the initial investigations. <br /> Steffen P.nbertwn in3 s;{nten <br />