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Marc Shaping the Future 1.0 INTRODUCTION On behalf of Phillips 66 Company (P66), Cardno ATC is submitting this Well Destruction Work Plan (Work Plan) to the San Joaquin County Environmental Health Department (SJCEHD) for the destruction of 12 monitoring wells, 2 vapor extraction wells, and 10 ozone sparge wells at the 76 (Former BP) Service Station No.11192, located at 1403 West Country Club Boulevard in Stockton, California, (Site) shown on Figure 1. This Work Plan was prepared in response to the Well Destruction Request letter of SJCEHD, dated September 5, 2013. 2.0 SITE HISTORY In 1976, two 10,000-gallon USTs containing unleaded gasoline, one 10,000-gallon USTs containing leaded gasoline, three 3,000-gallon USTs containing motor oil, and one 3,000-gallon USTs containing waste oil, the associated piping and dispensers, and other facility structures were installed at the Site. The was initially operated as a gasoline service station by Mobil Oil Company. In May 1989, the Site was purchased by British Petroleum (BP). The Site was operated under BP ownership until Tosco Corporation (now Phillips 66) assumed operations in 1994. 3.0 SCOPE OF WORK In general, the Scope of Work involves the proper destruction/abandonment of the monitoring wells, extraction wells (vapor and groundwater), injection wells (ozone and air) present at the Site which have been rendered obsolete as a result of the Site's regulatory closure. The workplan also includes the activities in support of the well destruction. The locations of the groundwater monitoring and remediation well networks are shown on Figure 2. All proposed work will be performed under the direction of a California Registered Professional Engineer or Geologist. 3.1 Permitting In advance of the well destruction activities at the Site, Cardno ATC will obtain all necessary permits from the SCJEHD. In addition, Cardno ATC also will obtain an encroachment permit from the City of Stockton for the wells constructed within the public right-of-way on Country Club Boulevard (MW-8)and Elmwood Avenue (MW-9 and MW-10). 3.2 Site Health and Safety Plan As required by the Occupational Safety and Health Administration (OSHA) Standard "Hazardous Waste Operations and Emergency Response" guidelines (29 CFR 1910.120), and by California Occupational Safety and Health Administration (Cal-OSHA) "Hazardous Waste Operations and Emergency Response" guidelines (CCR Title 8, Section 5192), Cardno ATC will update the existing Site-Specific Health and Safety Plan (HASP) prior to the commencement of fieldwork to include the current scope of work. The Site-Specific HASP will be reviewed by field staff and contractors before beginning field operations at the Site. 3.3 Subsurface Utility Clearance As required by California law, prior to commencement of field activities Cardno ATC personnel will conduct a Site walk and mark the surface of the Site in preparation for identification of subsurface utility/facilities. Cardno ATC will then submit this information to Underground Service Alert of Northern California and Nevada (USA North), so that utilities will visit the Site and mark the location of their subsurface facilities/utilities. Cardno ATC will also request that the Site operator provide any available subsurface utility maps for the Site and will employ a private utility locator to confirm the locations of potential subsurface utilities present in the proposed work area. In addition, each well location will be air knifed to a depth of five feet below ground surface (bgs) to locate and protect subsurface utility/facilities. Australia • Belgium • Canada • Ecuador • Germany • Indonesia • Italy • Kenya New Zealand • Papua New Guinea • Peru • Tanzania • United Arab Emirates United Kingdom • United States • Operations in 85 countries