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i <br /> Geological Technics Inc Page 2 <br /> 3550OWelty Road,Vernalis,CA <br /> Report-Preliminary Environmental Site Assessment <br /> Project No 248 2 <br /> February 6, 1995 <br /> The Preliminary Phase 11 ESA was designed to evaluate the presence or <br /> absence of petroleum contamination from past land use and specifically the <br /> nearby pipe line The initial scope of work was to drill four boreholes to <br /> �f groundwater and to collect and test soil samples The procedures, protocol <br /> and methods of the subsurface investigation were proposed in the January 3, <br /> 1995 Work Plan- Phase II Environmental Site Assessment prepared by <br /> Geological Technics Inc The work plan and soil boring permit were <br /> approved by Mr Harlin Knoll of the SJCPHSEHD on January 6, 1995 (attached <br /> in Appendix D) <br /> 2.0 SUMMARY OF PHASE I ESA <br /> The Phase I investigation was composed of four parts <br /> ' • A records review of relevant information concerning the Property and <br /> potential off-Property sources of contamination <br /> • An aerial photograph review to review past land usage of the Property <br /> • Site reconnaissance to delineate areas for future borehole installation and <br /> uncover subsurface structural information using a metal detector <br /> • Interviews with persons who might offer Information on past/present <br /> land usage of the Property and adjacent sites All written and pictorial <br /> information of relevance to the Investigation Is Included in Appendix E <br /> i <br /> 2.1 Records Review <br /> A records review was performed at the San Joaquin County Public Health <br /> Services, Environmental Health Division (SJCPHSEHD) on January 4, 1995 <br /> for properties in San Joaquin County On the same day a visit was made to <br /> the San Joaquin County Assessors office in Stockton with permission from <br /> the 35500 Welty Road property owner to review Assessors files Finally, the <br /> Stanislaus County Department of Environmental Resources (SCDER) was <br /> contacted on January 3, 1995 for the purpose of reviewing files on adjacent <br /> properties in Stanlslaus County According to the SCDER, however, there <br /> were no files with Information regarding these adjacent properties The <br /> following Is a summary of the records review from the first two sources <br /> • The files at the SJCPHSEHD identified only one property listed in the file <br /> review request form, the Western Farm Supply property located at 35100 <br /> Highway 33 The file detailed a site Investigation by Woodward/Clyde <br /> i <br />