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a, . CORRECTIVE ACTION PLAN for Tosco (Former BP) Service Station No 11192 1403 Country Club Boulevard Stockton, California Report No 140245 08 1.0 INTRODUCTION At the request of Tosco Corporation (Tosco), a subsidiary of Phillips Petroleum Company, and in accordance with the requirements of the San Joaquin County Public Health Services-Environmental Health Division (PHS-EHD), Gettler Ryan, Inc (GR) has prepared this Corrective Action Plan (CAP) for the subject site This CAP also includes a Work Plan for additional delineation of the hydrocarbon plume beneath the site In a letter to Tosco dated November 2, 2000, the PHS-EHD requested that a Problem Assessment Report (PAR)be submitted after vertical and lateral delineation of the hydrocarbon plume was completed During a conference call between Tosco, GR and the PHS-EHD on October 24, 2001, all three parties agreed that a CAP would be submitted instead of the PAR This decision and a timeframe for submittal of the CAP was presented in GR's letter to • the PHS-EHD, dated October 31, 2001, where a deadline of March 15, 2002 was proposed for submittal of the CAP This CAP has been prepared based on the guidelines presented in the California Code of Regulations, Title 23, Division 3, Chapter 16, Article 11, Sections 2725(b), (d), and (e) through (g), and formatted per the requirements of this regulation 2.0 SITE DESCRIPTION 21 General The site is located at 1403 Country Club Boulevard, on the northwest corner of the intersection of Country Club Boulevard and Pershing Avenue in Stockton, California (Figure 1) The site is currently an operating Tosco (76) Service Station Aboveground station facilities include a station building, a car wash, an auto service building and an oil change building (operated by others) and four dispenser islands under a canopy Underground facilities include three 10,000-gallon double- walled fiberglass gasoline underground storage tanks (USTs), one waste oil UST (operated by others), seven onsite (MW-1, MW-3 through MW-7 and MW-11)and three offsite (MW-8 through MW-10)groundwater monitoring wells Properties in the site vicinity are developed primarily for residential and commercial retail use A former Shell service station was located across Pershing Avenue to the east of the subject site, and is currently occupied by a closed bank Six groundwater monitoring wells were installed by others at and in the vicinity of the former Shell station Pertinent site features are shown on Figure 2