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_ 1117 Lone Palm Avenue, Suite B <br /> s Modesto, California.95351 <br /> wwwatc-enviro.com <br /> 209:579.2221 <br /> Y~' Fax 209.579.2225 <br /> A S S O C I A T E:S I 'N. C. <br /> March .2001 <br /> `54:17861:0001 e <br /> IMs Margaret tagbrio <br /> San Joaquin County.Public°Health Services <br /> Environmental Healiifbivision <br /> 304 E: Weber Avenue;;3rd Floor <br /> 1 Stockton, CA 95202. :.. ; <br /> Subject: "First'Quarter 2001,,Groundw2iter Monitoring-Report for;the.Fayette Manufacturing <br /> Site, '7675 west Eleventl ':Street; Tracy, California,-SJTV_CODE: 2233 <br /> Dear Ms. Lagorio: - <br /> As required by,the iSan:Jojilu -County=-Public`Health::Services, Environmental Health Division <br /> (PHS/EB ),;-ATC Associates nc. 'has prepared this letter report-summarizing the First,Quarter <br /> 20.01 groundwater monitflring and site crivities performed at the above,referenced '_site (Figure <br /> 0. -.Sainpling was performed -to monitor the.-distribution of petroleum hydrocarbons in <br /> groundwater: Monitoring was performed to determine the groundwater flow direction and the. . <br /> hydraulic.gradient�in-the uppe' '..st;aquifer. . <br /> SITE.toCAT'ION_ <br /> Tlie.:projeet.site.is located at 7675'West Eleventh Street, between MacArthur Drive and Chrisman <br /> Road; in_Tracy, California: The:site location is shown on'Vigure 1.. The vicinity of-the site is <br /> primarily.a commercial and industrial area The property,is owned by Dr. A.R. Glover. <br /> The'.site-isaocated`on ener`.all aevel terrain vcihi h slopes gently toward.the Tom Paine Slough, a <br /> g y <br /> . northwest trending:extension of the delta'located approxiinately 2:5 miles north of the site. <br /> BACKGROUND <br /> On October 15; 1986,,tw6500-gallon-gasoline-underground storage tanks (USTs) were removed <br /> from the site: During removal of the USTs, petroleum product was_noted in the.southern UST <br /> excavation (Figure-2). Soil samples were collected-:from 2.feet below the bottom of the USTs, <br /> 'I and petroleum constituents and.lead were detected.in.the soil samples.- <br /> { � On July 18, ,1-995; Smith Technology supervised the installation of three groundwater monitoring <br /> { `�✓ wells,.-MW-i, MW=2, and Mw73 (Figure_2). During installation of the monitoring wells, soil <br /> i W:u7861vepons\iqnir2001.aoc 1 <br />