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t SITE CHARACTERIZATION CITY OF STOCKTON VAN BUSKIRK PARK GOLF COURSE 1740 HOUSTON AVENUE STOCKTON, CALIFORNIA 1 1.0 INTRODUCTION This report presents the results of work to characterize the lateral extent of petroleum product constituent (PPC) migration in sub-surface soil and groundwater at the City of Stockton, Van Buskirk Park Golf Course, maintenance facility(site), in Stockton, California. The source of the PPCs was an apparent release from underground storage tanks (USTs) and fuel dispensers maintained at the site until January, 1994. This work was commissioned by Mr. Robert Murdock of the City of Stockton on January 30, 1996. Mr. Murdock can be contacted at the City of Stockton's Public Works Department at 425 El Dorado Street, Stockton, California, telephone number (209) 937 - 8829 The work herein documented was performed by the Environmental Services and Chemical Laboratory Divisions of Twining. The San Joaquin County Public Health Services (SJCPHS) is the regulatory agency conducting technical oversight of this project. 2.0 PURPOSE AND SCOPE The purpose of the site characterization was to assess and delimit the lateral extent of PPC impacted soil and to further investigate groundwater so that one or more corrective action(s) may be identified and proposed. The following scope of work was conducted to achieve the stated objective: • , Subsurface soil samples were collected from selected locations at the project site; • Groundwater samples were collected from boreholes drilled for soil sampling; • Soil and groundwater samples were chemically analyzed in the laboratory for selected PPCs; ' • Field and analytical data was evaluated to assess the lateral extent of PPC migration in soil and groundwater; and w • This report was prepared to document the investigative procedures, summarize the r findings, and present conclusions and recommendations.