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Report: Groundwater-qualityMonitoring—July 29,2002: 7500 West Eleventh Street, Tracy, CA Page 1 <br /> i <br /> 1.0�= INTRODUCTION <br /> This groundwater-quality monitoring report has been prepared for the site of a former <br /> fueling station at 7500 West Eleventh Street, Tracy, California. The fueling station <br /> ceased operation in 1998, and, in December of that year, eight underground fuel tanks <br /> were removed from the property. At that time, it was found that soil and groundwater <br /> beneath the site were affected by fuel hydrocarbons. A site characterization investigation <br /> completed in May 2000 included installation of seven groundwater-quality monitoring <br /> wells (The San Joaquin Company 2001d). A second phase of site characterization was <br /> conducted in March and April 2002 during which eight additional groundwater-quality <br /> monitoring wells were installed(The San Joaquin Company 2002a). <br /> The first round of groundwater-quality sampling and analysis was conducted on May 11, <br /> 2000 using the seven wells that were initially installed on the site (The San Joaquin <br /> F:~ Company 2001d). Five additional rounds of sampling and analysis were conducted <br /> between that date and April 11, 2002 with the round conducted on April 11, 2002 <br /> involving recovery of groundwater samples from all 15 wells that had been installed at <br /> i the site by that time (The San Joaquin Company 2001c, 2001b, 2001a, 2002b, 2002a). <br /> This report presents the results of a seventh sampling round that was conducted on July <br /> 29, 2001, together with a compilation of the data obtained from the earlier rounds of <br /> groundwater-quality monitoring. <br /> 1.1 Site Location <br /> The subject property is situated at 7500 West Eleventh Street, Tracy, California, at the <br /> intersection of Chrisman Road and West Eleventh Street. That location is shown on <br /> Figure 1. Its elevation is between 48 and 51 feet above mean sea Ievel (MSL). <br /> 1.2 Site Codes <br /> .r <br /> The California State Water Resources Control Board (SWRCB) has established the <br /> following Global ID code for the site under its Geographic Environmental Information <br /> Management System: <br /> Global ID: T0607700606 <br /> The Regional Water Quality Control Board (RWQCB) — Central Valley Region has <br /> established the following Case Number: <br /> Case Number: 390773 <br /> The San Joaquin County Public, Environmental Health Department (SJCEHD) has <br /> established the following identifier for the subject site: <br /> Site Code: 1392 <br /> sic <br />