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t" <br /> ERM- este Inc. �___ ------ - --_- <br /> . s ;7 9-'wino Qrrre• ;lainut C,rOeK,tea?forma v,1596-5s•1596-5v4215,9•;6•(1455•T•,,efax 14 151 945.9968 <br /> Suite 260 -� <br /> October 9, 1991 <br /> Ms. Mary Meays <br /> Public Health Services/Environmental Health <br /> San Joaquin County <br /> 1601 East Hazelton Avenue <br /> Stockton,CA 95201 <br /> oring <br /> Subject: Third Quarter 151 West Weber Aven e , Stocktond Water ,California rt <br /> Site Code: 1284 <br /> Dear Mary: <br /> ERM-West, Inc. has completed the third quarter ground water nsampling pl <br /> 1515 West Weber Avenue. Discussed herein are the purging <br /> an d with this <br /> methods and the results of the laboratory analyes. <br /> report are the second quarter sampling findings for your reference. <br /> � <br /> Monitoring wells MW-1 through MW-5 (Figure 1) were purged and <br /> sampled on September 9, 1991 by ERM-West. Inc.personnel. Prior to <br /> purging, the depth to water in the wells was measured by the wetted tape <br /> method(Table 1). The depth well <br /> 18 gallonof water per wells were <br /> then purged by removing approximately <br /> After purging was completed, the wells were-sampleSampling <br /> th ling was removable <br /> accomplished with a pre-cleaned Teflon bailer equipped <br /> petcock. Water was transfered from the bailer into laboratory-supplied <br /> bottles. All samples provided to the laboratory were labeled and sealed into <br /> zip-lock type plastic bags, and then placed on ice in a cooler. <br /> Quality AssurancelQuality Control (QA/QC) procedures were followed <br /> during purging and sampling. Prior to work at each well, the equipment <br /> was cleaned and decontaminated with an Alconox solution followed by a <br /> -- - - - - - - --- - <br /> -clean water-rinse.--Water-from-decontamination procedure was retained <br /> in 55-gallon drums and storedon site. <br /> legloves whi a-- <br /> handling sampling equipment <br /> andsample bots. Bailer cord was <br /> replaced before sampling at each well location. <br /> U� <br /> An alliliatO of The Enwronmemat Resources Management Grouo w1h offices worldwide ,.,, <br />