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s ai <br /> I <br /> UNION ICE COMPANY <br /> 1320 Weber Street, Stockton, California <br /> Re-Excavation Work Plan and <br /> Installation of Extraction Well <br /> 1.0 PROJECT IDENTIFICA77ON <br /> WHF Environmental Consultants has been authorized by Union Ice Company to <br /> respond to soil and groundwater contamination discovered during the removal of <br /> underground storage tanks at 1320 Weber Street in Stockton, California. The <br /> following is a two part work plan which calls for: (1) the excavation and remediation <br /> of contaminated soil; ar_d (2) the installation of an extraction well to remove floating <br /> product and address future groundwater treatment. <br /> 2.0 SITE DESCRIPTION AND HISTORY <br /> This site, located at 1320 Weber Street in Stockton, California, serves as a cold and <br /> frozen storage facility, in addition to the manufacturing of ice (Figure 1). <br /> Four underground tanks were removed in December 1988. During removal, gasoline <br /> contamination was found in the soils and floating oil the groundwater surface at <br /> approximately 15 feet. <br /> The facility is nearly surrounded by the Stockton Deep Water Channel and Mormon <br /> Slough (Figure 2). <br /> In March of 1989, six monitoring wells were installed by WHF ) nvironmental/Omni <br /> Enterprises, in addition to three previously installed wells by URS. One well, MW-- <br /> 4D, was installed into the second aquifer to a depth of 60 feet. Apparently, <br /> groundwater contamination is confined to the upper aquifer. <br /> A soil vapor survey, conducted in May 1990, has confirmed the presence of <br /> hydrocarbon contamination in this area, and has indicated a downgradient(SE) <br /> migration of floating product on the groundwater surface(See Plate 3 and Appendix <br /> B). <br />