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1 <br /> Union Ice Company <br /> 425 North Union Street, Stockton, California <br />' Phase II Revised Site Assessment, Installation of Monitoring Wells <br /> and Quarterly Groundwater Report (July, 1993) <br /> 1.0 ProjectIdenti Identification <br /> 1` <br /> This assessment has been conducted to install additional monitoring wells to 1) further <br /> define the lateral and vertical extent of soil and/or groundwater contanvnation, and 2) to <br /> determine the groundwater gradient at this site <br /> 2.0 Site Description and History <br />' Work at the site was initiated in August, 1989, when four (4) underground storage tanks <br /> were located on the property These were designated Tanks # 1 through # 4 Tanks #1 <br /> and #2 were 10,000 gallon fuel tanks that had been filled with water by Union Ice <br /> sometime in the past Tank #3 was a 500 gallon tank that had contained kerosene or fuel <br /> oil or diesel fuel Tank#4 was a 250 gallon tank that contained waste oil <br /> In September of 1989, these tanks were removed by SEMCO, under peanut, and with the <br /> direction of the San Joaquin County Environmental Health Division personnel, and <br /> disposed of according to law <br /> After the tanks were removed, soil samples were taken from beneath all of the tanks It <br /> was found that Tanks #1 and 42 had not leaked, however, Tank #4 had either leaked, or <br /> had been overfilled A soil sample taken approximately five (5) feet below the bottom of <br /> Tank #4 showed "non detect", indicating that the contamination was limited in extent <br /> Tank 93 had also leaked and a proposal was submitted to the San Joaquin County Health <br /> Department to excavate the contaminated soil This proposal was accepted and the soil <br /> was excavated between January 18 and 24, 1990 Approximately 550 cubic yards of soil <br /> which resulted from this work was taken to the Union Ice facility at 1320 W Weber <br /> Avenue, Stockton, and remediated at that site This assessment at the Union Street <br /> facility was carred out during the period of January 13 through the 21st , 1992 <br /> IAdditional Phase II work was designed and proposed to determine the vertical extent of <br /> soil contamination in the vicinity of Tanks #3 and 14, which were known to have leaked <br /> Furthermore, one (1) of the borings was completed as a monitoring well to establish the <br /> groundwater table at the site and check for possible contamination <br /> I <br />