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Ik <br /> B R O W N A g <br /> ti# <br /> .. C A L D W E L L = 2 <br /> December 7, 1994 <br /> Mr. Kyle Christie <br /> ARCO Products Company <br /> Post Office Box 5811 <br /> San Mateo, California 94402 017-1730-0111 <br /> Subject: 1994 Annual Report for ARCO Station 6080, 85 East Louise Road, <br /> Lathrop, California <br /> Dear Mr. Christie: <br /> This letter presents activities performed during 1994 at ARCO Products Company(ARCO) <br /> Station 6080, located at 85 East Louise Road in Lathrop, California. Groundwater at this <br /> site is sampled annually. The annual sampling for 1994 was performed on August 30, <br /> 1994, by Groundwater Technology, Inc. (GTI). This report was prepared by Brown and <br /> Caldwell (BC) under Task Order 6080-94-5. <br /> There are three on-site wells: AL-1, AL-2, and AL-4 (well locations are shown on <br /> Figure 1). Hydropunch samples (HP-1 and HP-2) were collected at this site in 1992. The <br /> locations of HP-1 and HP-2 are shown on Figure 1. No hydrocarbon constituents were <br /> identified in the hydropunch samples. rL <br /> Field and Analytical Methods <br /> GTI personnel measured depth-to-water, purged each well, and collected groundwater <br /> samples at the site. Static water-levels were measured and a check for floating product <br /> was made prior to commencing purging. Prior to sampling, the wells were purged of a <br /> minimum of three well volumes or until evacuated using a submersible purnp or bailer. <br /> After purging, each well was sampled using a disposable bailer that was steam-cleaned <br /> between uses. Field data sheets and chain-of-custody docur> entation are included in <br /> Exhibit A. <br /> All groundwater samples were analyzed for total petroleum hydrocarbons as gasoline <br /> (TPH-G) and benzene, toluene, ethylbenzene, and xylenes (BTEX) by U.S. Environmental <br /> Protection Agency (EPA) Methods 5030/8020/California DHS LUFT Method. <br /> This report was prepared in accordance with the standards of the environmental consulting industry at the time <br /> it was prepared. It should not be relied upon by parties other than those for whom it was prepared, and then <br /> only to the extent of the scope of work which was authorized. This report does not guarantee that no additional <br /> environmental contamination beyond that described in this report exists at the site. <br /> Environmental Engineering And Consulting•Analytical Services 1730JREP0RT9%ANNUAL94.RPT <br /> 9615 MICa0N AVENUE. SUITE 600. SAC RAMENT0, CA 95827-2627 <br /> (9161 444.0123 Fix (916) 856-5277 <br />