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_% <br /> 17 <br /> CALDWELL , l_ <br /> �J ^5 ! PM 12. 51 <br /> October 5, 1995 <br /> Mr Kyle Christie <br /> ARCO Products Company <br /> 2155 South Bascom Avenue, Suite 202 <br /> Campbell, California 95008 , 017-2043-01/1 <br /> Subject Third Quarter 1995 Report for ARCO Facility 2093, 3425 Tracy Boulevard, <br /> Tracy, California Pilot Program Site 1416 <br /> Dear Mr Chnstie <br /> This report presents water-level measurements and results of groundwater sampling performed <br /> during the third quarter of 1995 at ARCO Products Company (ARCO) Facility 2093, located at <br /> 3425 Tracy Boulevard in Tracy, California Fieldwork was performed by EMCON Associates <br /> (EMCON) on July 27, 1995 This report was prepared under Work Authorization No 08458-00 <br /> There are seven on-site groundwater monitoring wells (ATR-1 through ATR-7), one on-site <br /> dual-completion groundwater monitonng/air sparging well (SMW-1), one on-site dual-purpose <br /> groundwater extraction/soil vapor extraction well (TEX-1), seven on-site dual-completion soil <br /> vapor extraction/air sparging wells (VES-1 through VES-7) and three on-site air sparging wells <br /> (S-1 through S-3) as shown on Figure 1 In addition, there are five off-site monitoring wells <br /> (ATR-8 through ATR-12) <br /> This quarter, wells ATR-1, ATR-3, ATR-6, ATR-9, ATR-10, and ATR-11 were not sampled <br /> because these wells are sampled semi-annually Well ATR-9 was not sampled because of the <br /> presence of 0 12 feet of free product A passive free product skimmer has been installed in well <br /> ATR-8 To date, approximately one gallon of gasoline has been removed from this well <br /> Beginning with September 1995, the free product skimmer will be checked and emptied on a <br /> monthly basis or as needed Groundwater monitoring data was not collected from wells ATR-6 <br /> and ATR-12 because EMCON personnel could not open the well lids <br /> Field and Analytical Methods <br /> EMCON personnel measured depth-to-water and product thickness (when present), purged each <br /> 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 purging Before sampling, the <br /> This report etas prepared in accordance with the standards of the environmental consulting industry at the <br /> time it was prepared It should not be relied upon by parties other than those for whom it was prepared,and <br /> then only to the extent of the scope of work which ►vas authorized This report does not guarantee that no <br /> additional environmental contamination beyond that described in this report exists at the site <br /> Enwronmental Eng neenng And Consulting Analytical Services 2043\REPORTS13RD95QRT DOC <br /> 9616 MICRO% A5E\LE $LITE 600 $ tcR\%tE`TO Ca 9)8 2 7 2627 <br /> (916) 444 U23 FS\ (916} 8)6 )211 <br />