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i <br /> 1 Y <br /> SECOR <br /> +�pipr <br /> �l J5 i_ 11V <br /> v r p �`rrir` <br /> international Incorporate <br /> S F P 20 Phi 12 31 <br /> 5 <br /> September 16, 1999 ; <br /> Project 077 41741 500 0 <br /> Ms Margaret Lagono <br /> San Joaquin County Environmental Health Department u`3 <br /> <xr <br /> 304 East Weber Avenue, Third Floor <br /> Stockton, California 95202s <br /> r <br /> f� F <br /> rt <br /> Re Removal of USTs, Product Lines, and Dispensers <br /> ARCO Service Station#434 � I <br /> 501 West Kettleman Lane <br /> I <br /> Lodi, California ; <br /> Dear Ms Lagono <br /> 4 <br /> SECOR International Incorporated(SECOR) has prepared this letter on behalf of ARCO <br /> Products Company (ARCO) to document the excavation and removal of three fuel <br /> iunderground storage tanks (USTs), and associated product lines and dispensers at the site yey <br /> referenced above (Figures I and 2) This work was performed as part of the product line <br /> upgrade and UST removal activities referred to in the Work Plan for Soil Sampling <br /> during Product Line Upgrade, dated March 16, 1999, and an Addendum to this work <br /> plan dated May 10, 1999 <br /> SITE BACKGROUND <br /> y <br /> The site is located at the northwest corner of Kettleman Lane and Hutchins Street in # <br /> Lodi, California (Figure 1) Site facilities include an operating service station that retails <br /> gasoline fuel and an AM/PM mini-mart <br /> q <br /> In December 1986, a product line leak of approximately 870 gallons of gasoline was <br /> reported at the site From April 1987 through May 1990, Brown and Caldwell (B&C) <br /> installed 12 groundwater monitoring wells to assess the extent of the hydrocarbon impact <br /> in soil and groundwater beneath the site Additionally in 1990, B&C installed eight soil a <br /> vapor extraction wells, one groundwater extraction well, a soil vapor extraction system jf <br /> (S VE), and a groundwater extraction system (GWE) <br /> Based on low influent concentrations into the SVE and GWE systems, and the low to <br /> nondetectable concentrations of hydrocarbons in groundwater beneath the site, B&C <br /> requested site closure in 1996, and received site closure from the San Joaquin County <br /> • Department of Environmental Health <br /> 991213rlstness Pari IJrrvc Suite 100, Sacramento GA 95827 (916) 364-1880 (916)364-1889 Fax ivwur secor coil, <br /> 11krr ! <br /> � r <br />