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Final Remediation Plan Page 2 <br /> Ranch Market 23569 South Santa Fe Road Riverbank CA February 28 2001 <br /> • o Domestic Well Video Survey Report, May 23, 2000 (SECOR), <br /> o Evaluation of Potable Water Sources, August 21, 2000 (SECOR), <br /> o Soil and Groundwater Assessment Report, September 6, 2000(SECOR), <br /> o Additional Evaluation of Potable Water Sources, September 14, 2000 (SECOR), <br /> o Notification of Bottled Water Service, September 19, 2000(SECOR), <br /> o Problem Assessment Report, November 8, 2000 (SECOR), <br /> o DW-2 Well Destruction Work Plan, December 12, 2000 (SECOR), <br /> o Addendum to The Problem Assessment Report, December 18, 2000(SECOR), <br /> o Quarterly Montionng and Sampling Report(Q4/2000), December 19, 2000(SECOR), <br /> o DW-2 Well Destruction Report, January 26, 2000 (SECOR), <br /> o Domestic Well Installation Report(DW2R), February 1, 2001 (SECOR) <br /> 2.3 Underground Storage Tank Removal <br /> The site was previously operated as a convenience store and retail gasoline fueling facility <br /> with three single walled steel gasoline underground storage tanks (USTs) as shown on Figure <br /> 3 The date of installation, operation history, and inventory records of the USTs at the Site is <br /> unknown The three USTs two 1,000-gallon and one 5,000-gallon UST and associated <br /> pumps were removed from the Site on May 20, 1991 The single dispenser island was located <br /> directly over the tank pit, so no dispenser or fuel line soil samples were collected During <br /> removal of the USTs, soil contamination was observed at the bottom of the tank excavation <br /> and documented in five soil samples collected after removal of the tanks (Figure 3, Table 1) <br /> 2.4 Domestic Wells and Septic Fields <br /> The Site and the following three residences use septic fields for treatment of waste water and <br /> have domestic wells that are the sole source of water for each residence <br /> Owner Address Parcel Number Well# <br /> Ranch Market 23569 S Santa Fe Road APN 249-070-12 DW-1 <br /> Juan Pantoja 23565 S Santa Fe Road APN 249-070-11 DW-2R <br /> Jose Cano 23659 S Santa Fe Road APN 249-070-10, DW-3 <br /> Troy Roe 23665 S Santa Fe Road APN 249-070-09, DW-4 <br /> The location of the domestic wells and septic field on each property is shown on Figure 2 and <br /> the well completion information is summarized in Table 2 Well DW-1 is sampled monthly <br /> and Wells DW-2R, DW-3, and DW-4 are sampled quarterly for the presence of benzene, <br /> toluene, ethyl benzene, and xylenes (BTEX), total petroleum hydrocarbons quantified as <br /> gasoline (TPHg), oxygenates, 1,2-Dichloroethane (1,2-DCA), and 1,2-Dibromoethane (EDB) <br /> using Environmental Protection Agency (EPA) method 8260B <br /> 2.4.1 Domestic Well DW-2 Shut Down and Destruction <br /> On October 7, 1999, domestic well DW-2 was sampled and reported to contain MtBE at 38 <br /> parts-per-billion (ppb) (Table 3) Since additional water samples collected in November and <br /> December 1999 contained MtBE, the RWQCB required well DW-2 to be removed from <br /> service and the home supplied with an alternative potable water supply In January 2000, <br /> DW-2 was shut down and a temporary water line was run from the Ranch Market well DW-1 <br /> File FRP report doe SECOR International Incorporated <br />