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r <br /> M O <br /> 0 <br /> anteagroup <br /> Revised Site Investigation Report & <br /> I <br /> Case Closure Request <br /> Country Market <br /> 10476 West Linne Road, Tracy, California <br /> San Joaquin County Environmental Health <br /> File Case No. R00002070 <br /> Iwo INTRODUCTION <br /> Antea®Group has prepared this Site Investigation Report & Case Closure Request on behalf of Mr. John Muniz Jr, <br /> owner of the Tracy Country Market (Client), located at 10476 West Linne Road in Tracy, California (Figure 1). The <br /> purpose of this report is to present the findings of soil investigation activities conducted by Antea Group to <br /> evaluate, the extent of petroleum hydrocarbons in soil and groundwater related to the presence of two former <br /> gasoline underground storage tanks (USTs), per our approved Site Investigation Work Plan Addendum dated <br /> December"6, 2013. Field investigations included collection of soil samples during removal of the USTs in November <br /> 2012 by Jim Thorpe Oil, Inc. and collection of additional soil and groundwater samples by Antea Group on <br /> February 28, 2014. The report also presents an evaluation of the site relative to the criteria for low-threat closure <br /> presented in the California "Water Quality Control Policy for Low-Threat Underground Storage Tank Case Closure, <br /> State Water Resources Control Board Resolution No. 2012-0016" (SB 2012-0016). <br /> 1 .1 Site Description <br /> West Linne Road borders the site oPr the north; South Tracy Boulevard to the west; and residential properties <br /> immediately to the south and east (Figure 1). Properties in the surrounding area are primarily residential to the <br /> north, and commercial and industrial to the east, west and south .. The Country Market convenience store <br /> currently occupies the site. Two gasoline USTs were previously located in the northwest corner of the site. The <br /> site surface is mostly paved with asphalt, with unpaved or landscaped areas in the east and south portions of the <br /> site. One domestic well is located in the northeast portion of the property and is used to supply water to the store. <br /> 1.2 Site Background <br /> On June 28, 2013, Antea Group conducted a review of site records available with the San Joaquin County <br /> Environmental Health Department (SICEHD). According to the documents reviewed, two former USTs were <br /> installed circa 1959. These former USTs were 350- and 500-gallbn single-walled steel tanks used for storage of <br /> leaded and unleaded gasoline. Both USTs were abandoned in place in the late 1980s by filling each tank with <br /> concrete slurry. Jim Thorpe Oil, Inc. (Jim Thorpe) excavated and removed both slurried USTs from the site on <br /> November 16, 2012, <br /> r" <br /> www,anteagroup.com <br /> 1 <br />