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FARR ASSOCIATES <br /> 1.0 INTRODUCTION <br /> On behalf of Union Ice Limited Partnership, Farr Associates submits this report on the former <br /> Union Ice facility at 425 North Union Street in Stockton, California (Site) The report presents <br /> recently collected data from the last quarterly monitoring event, and a description of the disposal <br /> of drummed waste that was previously stored at the Site The report also documents the past <br /> removal of underground storage tanks, site investigation and remediation at the Site and contains <br /> a request for no further action The report has been prepared to meet the requirements of the "No <br /> Further Action Request" guidance contained in Appendix B of the Tri-Regional Board Staff <br /> Recommendations for Preliminary Investigation and Evaluation of Underground Tank Sites <br /> Site investigation and remediation work has been conducted by several environmental <br /> consultants, including WHF Environmental Consultants (WHF), ICF Kaiser Engineers, Inc (ICF <br /> Kaiser), and Farr Associates <br /> 2.0 SITE SETTING AND HYDROGEOLOGY <br /> 21 Site Location <br /> The former Union Ice facility is located at 425 Union Street, Stockton, California The site is <br /> situated north of Lindsey Street, east of the Union Pacific Rail Lines, south of a vacant lot, and <br /> west of Union Street (Figure 1) <br /> 22 Site Geology <br /> The subsurface geology at the Site is characterized by interbedded, inorganic,, clayey silts and <br /> silty clays, with numerous silty sands The sediments become coarser with depth, with a silty, <br /> gravely, fine to medium grained sand below the water table Fliese sediments are typical of the <br /> valley fill deposits in the region Figure 2 depicts the location of two geologic cross sections, <br /> included as Figure 3 and 4 which illustrate these conditions (WHF, January 1994) <br /> 23 Site Hydrogeology <br /> vCopies of the logs for all wells are <br /> Five wells have been drilled at the Site, as shown on Figure 5 <br /> included in Appendix B Table 1 includes a summary of all groundwater elevation <br /> measurements made from these wells The groundwater gradient has been consistently east to <br /> northeast, as depicted for the most recent sampling event, September 8, 1998 on Figure 5 <br /> C 1MyFdes\Annelwpwmlproject5lumon\C iosureRpt wpd 1 <br />