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1 <br /> C) <br /> PRIVILEGED &CONFIDENTIAL <br /> GRO ND ATER MONITORING WELL <br /> ABANDONMENT REPORT <br /> Wells Fargo Bank Property <br /> ' 49 South Wilson Way <br /> Stockton, California <br /> + SJCEHD Site No.506077 <br /> 1.0 INTRODUCTION <br /> Building Analytics is pleased to submit this report, which summarizes the groundwater <br /> monitoring well abandonment activities at the Wells Fargo Bank property located at 49 <br /> South Wilson Way, Stockton, California, to the San Joaquin County Public Health <br /> Services, Environmental Health Division (SJCEHD) and to Wells Fargo Bank, Corporate <br /> Properties Group. These groundwater monitoring well abandonment activities were <br /> conducted in general accordance with the .SJCEHD regulations and the requirements <br /> outlined in the Building Analytics Groundwater Monitoring Well Abandonment Work <br /> Plan dated July 26, 1999. <br /> 2.0 BACKGROUND <br /> 2.1 Phase I Environmental Site Assessment (ESA), October 1995 <br /> Building Analytics conducted a Phase I ESA of the subject property in October, 1995. <br /> The following environmental issues were identified: <br /> • According to historical Sanborn fire insurance maps, a gasoline service station <br /> existed on the subject property during the 1950's. <br /> • During the site reconnaissance, Building Analytics observed an ongoing <br /> subsurface investigation at the former Roek Construction facility, adjacent, on the <br /> r southeast corner of the intersection of South.Wilson Way and East Market Street. <br /> • The government records research indicated that a Texaco gasoline service station <br /> currently located adjacent, on the southwest corner of the intersection of South <br /> Wilson Way and East Market Street, had been identified as a leaking underground <br /> storage tank (LUST) site. <br /> 2.2 Phase II Subsurface Investigation,February 1996 <br /> Le A Phase II Subsurface Investigation was performed by Building Analytics in February <br /> 1996, to investigate the potential effects of an environmental impact from the former on- <br /> site gasoline service station. The following is a summary of the findings from the <br /> investigation: <br /> • Soil samples were collected from five Geoprobe borings at depths of up to 25 <br /> feet below ground surface (bgs); <br /> • The soil samples revealed non-detectable concentrations of total petroleum <br /> hydrocarbons as gasoline and diesel (TPH-g and TPH-d) and benzene, <br /> toluene, ethylbenzene and xylenes (BTEX); and <br /> + 1 199164—WFB.Stockton Well Abandonment Rpt. <br /> f <br /> i <br />