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B R O W N A N D <br /> C A L D W E L L <br /> July 21 1995 <br /> 1995 <br /> Mr Kyle Christie ENVlRO <br /> ARCO Products Company PERIv11TjSRVlCE4Lm <br /> 2155 South Bascom Avenue, Suite 202 ES <br /> Campbell, California 95008 017-2043-01/1 <br /> Subject Second Quarter 1995 Report for ARCO Facility 2093, 3425 Tracy Boulevard, <br /> Tracy, California. Pilot Program Site 1416 <br /> Dear Mr Christie <br /> This report presents water-level measurements and results of groundwater sampling performed <br /> during the second quarter of 1995 at ARCO Products Company (ARCO)Facility 2093,located <br /> at 3425 Tracy Boulevard in Tracy, California Fieldwork was performed by EMCON <br /> Associates (EMCON) on April 25 and 26, 1995. This report was prepared under Work <br /> Authorization No 08458-00 <br /> There are seven on-site groundwater monitonng wells (ATR-1 through ATR-7) one on-site <br /> dual-completion groundwater monitonng/ur sparging well (SMW-1), five off-site monitonng <br /> wells (ATR-8 through ATR-12), one on-site dual-purpose groundwater extraction/sod vapor <br /> extraction well(TEX-1), seven on-site dual-completion soil vaporextraction/air sparging wells <br /> (VES-1 through VES-7) and three on-site air sparging wells (S-1 through S-3) as shown on <br /> Figure 1 <br /> This quarter, well ATR-3 was not sampled because of a free product sheen, and well ATR-8 <br /> was not sampled because of the presence of 0 50 feet of free product A passive free product <br /> skimmer has been installed in well ATR-8 To date, less than one gallon of gasoline has been <br /> removed from this well. The free product skimmer will be checked and emptied on a monthly <br /> basis or as needed beginning in the third quarter of 1995 Wells ATR-6 and ATR-12 were <br /> not sampled because EMCON was unable to access the wells due to inoperable well covers. <br /> Field and Analytical Methods <br /> EMCON personnel measured depth-to-water and product thickness (when present), purged <br /> each well to be sampled, and collected groundwater samples at the site Depth-to-water <br /> measurements and a check for free product were made prior to commencing purging. <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 This report does not guarantee that no additional environmental <br /> contamination beyond that described in this report exists at the site <br /> Enwronmenta!Engineenng Anti COnsuMng Analytical Services <br /> 9 616 M I C R o ti ALE`[ F SLITF 6 0 0 $ 1 C R 4 til E�T o CA 9 5 8 2 7 2 6 2 l2p43\REpoRTS\ZNA95QTRRPT <br /> (9161 444 0123 Fax (9161 856 5277 <br />