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i <br />• The lateral extent of the dissolved contaminant plume associated with the former <br /> underground fuel storage tank has been essentially defined, except in the vicinity of well <br /> MW4, north of the former tank It is unclear whether contamination at MW4 can be <br /> attributed to the former tank or from a potential off-site contributing source <br /> In accordance with PHS/EHD correspondence dated December 27, 1993, the sampling <br /> schedule of MWI has been be reduced to annually and wells MW5 and MW6 to semi- <br /> annually Wells MW2, MW3 and MW4 will continue to be sampled quarterly This <br /> schedule is based upon historical groundwater analytical data <br /> If you have any questions regarding this project, please contact Tom Lutterman at our <br /> Escalon office (209) 838-3507 <br /> Sincerely, <br /> Canonie Environmental Services Corp <br /> Tom J Lutterman <br /> Project Geologist <br /> ta � <br /> Jeanne Hornsey, P E `" °k�' y,70u_ <br /> CA Registered Civil Engineer No C 47410 <br /> TJL/ggk E r� <br /> �`fr <br /> Attachments <br /> Table 1 Summary of Groundwater Monitoring <br /> Table 2 Summary of Laboratory Analyses <br /> Figure 1 Site Location Map <br /> Figure 2 Groundwater Gradient Map <br /> Attachment 1 Well Purge Logs <br /> Attachment 2 Laboratory Data Sheets and Chain of Custody <br /> Attachment 3 Purge Water Manifest <br /> cc Ms Donna Gardner <br /> Mr Ron Rail, SJCUMD <br /> Ms Elizabeth Thayer, RWQCB <br /> Cann leEnv1ronmental <br />