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10 INTRODUCTION <br /> On behalf of Union Pacific Railroad Company (UPRR), Environmental <br /> Resources Management (ERM) has prepared this Site Closure Report (Closure <br /> Report) for the former underground fuel storage tank (UST) site at 936 East <br /> Weber Avenue, in Stockton, California (site) (Figure 1) The tank reportedly <br /> contained unleaded gasoline and analytical results indicate the absence of <br /> diesel fuel hydrocarbons ERM has previously discussed site closure with the <br /> San Joaquin County Public Health Services/Environmental Health Division <br /> (PHS/EHD) During these discussions, the PHS/EHD agreed that this site <br /> was a good candidate for closure based on the extensive ground water <br /> sampling completed without the observance of significant concentrations of <br /> contaminants of concern Tlus report has been prepared to summarize the <br /> site data, to satisfy the applicable requirements of the PHS/EHD checklist of <br /> required data for closure of UST sites, and to formally request site closure <br /> [ 1 I DOCUMENT ORGANIZATION <br /> This document is organized as follows <br /> o The remainder of Section 10 provides general site background <br /> ( including site location, geologic setting, and ground water hydrology, <br /> 1 o Section 2 0 summarizes the findings of subsurface investigations at the <br /> site, <br /> a Section 3 0 discusses the risk and future beneficial uses of the site, <br /> Section 4 0 discusses future well abandonment, and <br /> I ® Section 5 0 presents references cited or relied upon in preparing this <br /> document <br /> As required by Item #2 of the PHS/EHD checklist of required data for <br /> closure of UST sites, site maps showing locations of the former UST <br /> system, boring and monitoring well locations,and ground water elevation <br /> contours are presented in Figures 1 through 4, following the text <br /> As required by Items #6 and 7 of the PHS/EHD checklist, tabulated <br /> results of all sampling and analyses and all ground water elevation data <br /> IL are contained within Tables 1 through 3, following the text <br /> Two appendices are attached to this report Appendix A contains the <br /> ` PHS/EHD checklist for site closure This checklist references the section <br /> ERM 1 934350/UPRR/07/11/02 <br />