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ERM-West, Inc. <br /> Suite 260• 1777 Botelho Drive•Walnut Creek, California 94596-5042 •(415)946-0455•Telefax (415) 946-9968 <br /> Jx1:17TO <br /> July 14, 1992 JUL 15 1992 <br /> EM KINMENW HEAUH <br /> Ms Mary MeayPERMITISES <br /> s <br /> Public Health Services/Environmental Health <br /> San Joaquin County <br /> 1601 East Hazelton Avenue <br /> Stockton, CA 95201 <br /> Subject Second Quarter 1992 Groundwater Monitoring Report <br /> Former Tank Sites #1 and #2 <br /> 1325 West Weber Avenue, Stockton, California <br /> Site Code- 1284 <br /> Dear Mary <br /> ERM-West, Inc (ERM-West) has completed the second quarter 1992 <br /> groundwater sampling for Former Tank Sites #1 and #2 located at 1325 <br /> West Weber Avenue, Stockton, California Discussed herein are the <br /> purging and sampling methods and the results of the laboratory analyses <br /> For your reference, also included an the data tables of this report are <br /> summaries of sampling findings from previous quarters <br /> PuWng and„SSamnling <br /> Monitoring wells MW-1 through MW-5 (Former Tank Site #1) and MW-1A <br /> through MW-4A (Former Tank Site #2) as shown on Figures 1 and 2, <br /> respectively, were purged and sampled on June 3, 1992, by ERM-West <br /> personnel Prior to purging, the depth to water in the wells was measured <br /> by the wetted tape method (Table 1) The depth of each well was also <br /> measured The wells were then purged by removing approximately 5 to 25 <br /> gallons of water per well The monitoring well purge records are attached <br /> After purging was completed, the wells were sampled Sampling was <br /> performed using a precleaned Teflon® bailer equipped with a removable <br /> petcock Water was transferred from the bailer into laboratory-supplied <br /> bottles All samples provided to the laboratory were labeled and sealed into <br /> Zip-Lock@) plastic bags and then placed on ice an a cooler <br /> Quality Assurance/Quality Control (QA/QC) procedures were followed <br /> during purging and sampling Prior to work at each well, the equipment <br /> 7M <br /> An affiliate of The Environmental Resources Management Group with offices worldwide �e <br />