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UNION ICE COMPANY Report of Findings r I.0 IATRODUCTION In March of 1990, Omni Enterprises and Heniu4�and Associates were retained by Union Ice Company to conduct a subsurface investigation related to leaking underground fuel tank(s)and the resu:ting soils and ground water contamination problem at Union Ice Company's facility on West Weber Street iii Stockton, California. The Union Ice facility site is a parcel of property approximately 13 acres in size. It is located hi a portion of the S 112, Section 10, Township 1 North, Range 5 Fast, M.D.B.&M. The physical location is 1320 West Weber Street, City of Stockton, Count`j of San Joaquin, California(Figure 1). This facility manufactures ice and provides cold and frozen storage in two main warehouse buildings on the site. Site topography is generally flat lying. Most of the site is covered by asphalt and concrete pavement. The Union site is nearly surrounded by the Stockton Deep Water Channel to the North and Mormoi, Slough to the South. Surface elevation is approximately 97 feet A,M.S.C. Fc ur underground storage tanks were removed at the facility in December 1988. During removal of the tanks, gasoline, approximately four to sic inches thick, was found floating on ground water encountered in the bottom of the excavation. The amount of gasoline which leaked is unknown. 2.0 SCOPE OF WORD In March of 1989, UR.S Consultants (URS) 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 ground water at the site, along with the implementation of remedial measures. (Refer to "Ground water Investigation Work Plan for Union Ice Company, March 13, 1989," URS Consultants). ------ — - The URS proposal called-for-l0-monitoring wells to be drilled,-in-order.to mvestiga -T_- --- ---_-- - - -_-- -- both the first and secocsd 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 `gig'' Ice Company to suspend the investigation and resume at a later date.