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i <br /> UR <br /> L� <br /> Applied GeoSystems 4191-E Pawer Inn Raad, Sacramento, CA 95826 (916) 452.2901 <br /> • FREMONT +IRVINE • HOUSTON • BOSTON + SACRAMENTO •CULVER CITY •SAN JOSE <br /> June 13, 1991 <br /> AGS 38048-6W <br /> Mr. Chuck Carmel <br /> ARCO Products Company <br /> P.O. Box 5811 <br /> San Mateo, California 94402 <br /> Subject: Addendum to Work Plan for a Subsurface Investigat'son;at ARCO Service <br /> Station No. 760, 2Z South Cherokee Lane, Lodi, California. <br /> Mr. Carmel: <br /> At the request of ARCO Products Company(ARCO), Applied GeoSystems, <br /> 1rrc./RFSNA Industries (Applied GeoSystems) is submitting this addendum to our <br /> previous Work Plan No.38048-3W, dated April 23, 1990, a Results of(nidal <br /> Investigation and Work PIan for Excavation During Tank Replacement, Report No. <br /> d during tank <br /> 0. <br /> replactional work to be conducte <br /> ement <br /> 4, dated Decerhides b tori g ha emloval n replacement of the underground <br /> ' replscement includes 8 <br /> storage tanks. The purpose of the work is to evaluate whether hydrocarbons are <br /> affecting natrvn sail underlying the site and to assist ARCO and their contractors in <br /> _olnplying wiflc.local permitting for underground storage tank replacement N.,o:retnedia� <br /> actiVltiCdl will,:be?_ai ducted,duri�g the rerrsoval and replacement of the tanks.#ARCO <br /> Service Station Na 760 is located on the northwest corner of South Cherokee Lane and <br /> Lodi Avenue in Lodi, California, as shown on the Site Vicinity Map (Plate P-1). <br /> A representative of Applied GeoSystems was at the site in May 1990 to observe drilling <br /> k of three soil borings near the"former waste-oil tank cavity. We returned to the site in <br /> October 1990 to observe the drilling of five additional soil borings near the existing and <br /> proposed gasoline tank cavity. Locations of the borings are shown on the Gerieralized <br /> Site Plan(Plate P 2). Results of the October 1990 investigation indicated residual <br /> gasoline hydrocarbons were not defected in the soil sample collected from borings <br /> around the perimeter�ant remediation. However,cavity or near the pr <br /> concentrations thathat wHowe er, hydrocarbons may be present in <br /> in soil <br /> underlying the existing underground-storage tanks. <br /> S In✓ <br /> 1 <br /> i <br /> t <br />