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Bto v � , �!_ HEALTH <br /> CALDWELLk} � � -� �` ' 5 ' <br /> September 6, 1994 <br /> Mr Chuck Carmel <br /> ARCO Products Company <br /> Post Office Box 5811 <br /> San Mateo, California 94402 017-1273-01/1 <br /> Subject Second 1994 Quarterly Report for ARCO Station 2133, <br /> 2908 Ben.Jamm Holt Drive, Stockton, California <br /> Dear Mr Carmel <br /> This report presents water level measurements, results of groundwater sampling, and <br /> summarizes the status of the groundwater extraction system (GWES). This work was <br /> performed during the second quarter of 1994 at ARCO Products Company (ARCO) Station <br /> 2133 located at 2908 Benjamin Holt Drive in Stockton, California The field work for the <br /> quarterly groundwater sampling was performed on June 27, 1994, by Groundwater <br /> Technology, Inc (GTI) Field work for the operation and maintenance of the GWES was <br /> . conducted by Brown and Caldwell. This report was prepared under Task Order 2133-94-5 <br /> There is one groundwater extraction well (R) on site There are eleven on-site groundwater <br /> monitoring wells (E-2 through E-6, E-9 through E-12, and MW-1 and MW-2), and six off-site <br /> groundwater monitoring wells (E-7, E-8, PR-1, PR-2, BHD-1, and BHD-2) (Figure 1). In <br /> addition, seven soil vapor extraction wells (V-1 through V-7) and six air sparging wells (S-1 <br /> through S-6) were installed in October 1993 (also shown on Figure 1 ) All groundwater <br /> monitoring wells were sampled during the quarterly sampling event. <br /> Quarterly Sampling Field and Analytical Methods <br /> GTI personnel measured depth-to-water, purged each well,and collected groundwater samples <br /> at the site. A copy of GTI's field notes is included in Exhibit A The purge water generated <br /> during this sampling event was temporarily stored on site in 55-gallon barrels then transported <br /> off site by Integrated Waste Management. <br /> All groundwater samples were analyzed for total petroleum hydrocarbons as gasoline (TPH-G) <br /> and benzene, toluene, ethylbenzene, and xylenes (BTEX) by U S Environmental Protection <br /> —` Agency Methods 5030/8020/DHS LUFT <br /> N <br /> This report was prepared in accordance with the standards of the environmental consulting industry at the time it was <br /> prepared It should not be relied upon by parties other than those for whom it was prepared, and then only to the <br /> extent of the scope of work which was authorized Thus report does not guarantee that no additional environmental <br /> contamination beyond that described in this report exists at the site <br /> Fnvvonmental Engineering And Consulting Analytical Seances <br /> 9616 titICRoN A%F%UE P 0 Box 13449, SACRAMENTO CA 95813 31�JWP0RTS\M94QTR.RPT <br /> (916) 444 0123 FAX (916) 856 5277 <br />