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t <br /> . Corrective Action Plan—Tos(,o(76)Service Station No 11192, Stockton, California <br /> March 13, 2002 <br /> 3.0 CORRECTIVE ACTION PLAN COMPONENTS <br /> 31 Impact,Assessment <br /> I The physical and chemical characteristics of the hazardous substance or its <br /> constituents, including their toxicity, persistence, and potential for migration in water, <br /> soil, and air: <br /> Based on the analytical results for both soil and groundwater samples collected to date, the primary <br /> contaminant appears to be gasoline (BTEX constituents and MtBE) Material Safety Data Sheets <br /> (MSDS) for unleaded gasolines are attached to this CAP in Appendix A The MSDS sheets describe <br /> the physical and chemical characteristics of gasoline and its components <br /> The analytical results of the groundwater samples collected from the monitoring wells at and in the <br /> vicinity of the site indicate that dissolved concentrations of petroleum hydrocarbons are present in <br /> the wells Free product has never been detected at the site It is GR's understanding that as of <br /> January 1, 2001, Tosco no longer delivers fuel containing MtBE to service stations in northern <br /> California <br /> • <br /> 140245 08 5 <br />