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UNION ICE COMPANY .1320 Weber Avenue, Stockton, California - Phase III Continuing Re-Excavation Activities & Phase IV Remediation .1.0 PROJECT IDENTIFICATION WHF Environmental Consultants has been authorized by Union Ice Company to continue re-excavation activities at 1320 West Weber Avenue in Stockton, California. This Phase III and Phase IV work plan deals with the re-excavation and also the remediation activities. 2.0 SITE DESCRIPTION AND HISTORY The Union Ice Company ("UIC") owns and operates an ice manufacturing and cold frozen storage warehouse facility at 1320 Weber Street, in Stockton, California (Figure _ 1). The facility is nearly surrounded by the Stockton Deep Water Channel and Mormon Slough. Four (4) underground tanks were removed from this facility in December of 1988. In March of 1989, URS Consultants were retained by Union Ice Company to perform a remedial investigation. Their work plan was designed to investigate the lateral and — vertical extent of gasoline contamination of groundwater at the site, along with the implementation of remedial measures. — The URS proposal called for 10 monitoring wells to be drilled, in order to investigate both the first and second aquifers. Three of these wells, MW-1D, MW-1S, and MW-6S were completed on August 28, 1989. At that time, the decision was made by Union Ice Company to suspend the investigation and resume at a later date. Omni Enterprises of Ripon, California, was selected to continue this investigation in — March of 1990. On 1 April 1990, Omni Enterprises was merged into WHF Environmental Consultants of Modesto, California. Our work consisted of drilling 6 monitoring wells in order to investigate the vertical and lateral extent of gasoline contamination in the soils and groundwater beneath the site. MW-2S, 3S, 4S, 5S, and 6S tested the soils within the vadose zone, as well as the