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AWARAW <br /> 0) Working To Restore Nature <br /> 0 <br /> 3164 Gold Camp Drive <br /> Rancho Cordova, CA 95670 <br /> Phone (916) 852-6690 <br /> Fax (916) 852-6688 <br /> 1 <br /> March 18, 1993 <br /> Mr Chuck Carmel <br /> ARCO Products Company <br /> P.O Box 5811 <br /> San Mateo, California 94402 <br /> 0 Subject- Status of Fourth Quarter 1992 Environmental Investigation and Addendum <br /> Work Plan, for ARCO Service Station No 6100, 25775 South Patterson Pass, <br /> Tracy, California. <br /> pis) Mr. Carmel <br /> This report summarizes the status of the environmental investigation performed by RESNA <br /> Industries (RESNA) during the fourth quarterfor additional 92 for n wOrProducts k at the subject site Wany ork <br /> and presents an addendum to the p <br /> conducted included addltlnal assessment of residual hydrocarbons in soil. The site is near <br /> 0 the northwest corner of the intersection of South Patterson Pass Road and Interstate 5, as <br /> shown on the Site Vicinity Map (Plate <br /> on the General z d S►tete locations Plan (Plate 2)he tanks and other <br /> selected site features are sho <br />• PREVIOUS WORK <br /> In June 1990, at the request of ARCO, RESNA (formerly Applied GeoSystems) observed <br /> drilling of five soil borings (B-1 through B-5) were deter ed nat the site dso l samsplesscollected from <br /> 90, <br /> Report No 30041-1) Gasoline hydrocarbons <br />. the borings <br /> Roux Associates (Roux) conducted an investigation from November 1990 to February 1991 <br /> in conjunction with the removal of five Report No underground <br /> AR06776W)e tanks and associated The presence of hydrocarbons <br /> oduct- <br /> delivery lines (Roux, May 29, 1991, p <br /> in soil within the tank cavity necessitated the excavation of the cavity to depths ranging from <br /> i 15 to 25 feet below ground surface (bgs). Soil samples collected from the limas of the over- <br /> 1231ccar <br /> 30041-4 <br /> 0 <br />