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PRIVILEGED & CONFIDENTIAL <br /> ADDITIONAL PHASE II SUBSURFACE INVESTIGATION <br /> AND QUARTERLY GROUNDWATER MONITORING <br /> Wells Fargo Bank Property <br /> 49 South Wilson Way <br /> Stockton, California <br /> SJCEHD Site No. 506077 <br /> INTRODUCTION <br /> Building Analytics is pleased to submit this report summarizing the Additional Phase II <br /> Subsurface Investigation and Quarterly Groundwater Monitoring to Wells Fargo Bank, <br /> Corporate Properties Group, and the San Joaquin County Public Health Services, <br /> Environmental Health Division (SJCEHD). This report is regarding the Wells Fargo Bank <br /> property located at 49 South Wilson Way in Stockton, California. The Phase II Subsurface <br /> Investigation and Quarterly Groundwater Monitoring were performed in general accordance <br /> with the scope of services outlined in Building Anaiytics' Proposal Number LA3417 dated <br /> June 3, 1997 and Work Plan dated May 4, 1998. <br /> BACKGROUND <br /> Site Location <br /> The site is located at 49 South Wilson Way, on the northwest corner of Wilson Way and <br /> Market Street, in the City of Stockton, San Joaquin County, California (Figures 1 and 2). <br /> The site is located in the northeast quarter of Section 32, Township 1 North, Range 6 East, <br /> of the Mount Diablo Base and Meridian. <br /> tPhase I Environmental Site Assessment (ESA) <br /> Building Analytics conducted a Phase I Environmental Site Assessment (ESA) of the <br /> subject property in October, 1995. The following environmental issues were identified: <br /> According to historical Sanborn fire insurance maps, a gasoline service station existed on <br /> the subject property during the 1950's. <br /> During the site reconnaissance, Building Analytics observed an on-going subsurface <br /> investigation at the former Roek Construction facility, adjacent, on the southeast corner of <br /> the intersection of South Wilson Way and Market Street. <br />' The government records research indicated that a Texaco gasoline service station currently <br /> located adjacent, on the southwest corner of the intersection, is identified as a leaking <br /> underground storage tank (LUST) site. <br /> Phase II Subsurface Investigation <br /> A Phase II Subsurface Investigation was performed by Building Analytics in February <br /> 1996, to investigate the potential effects of an environmental impact by the former on-site <br /> gasoline service station. Soil samples were collected from five Geoprobe borings at depths <br /> of up to 25 feet below ground surface (bgs). The soil samples revealed non-detectable <br /> 1 199075-WFB,Stockton Ph.11 and Quart-Groundwater <br /> I <br />