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gmg Union fee Compa" Union Street Facility � Final Rowdiation Plan Page. 2 3.0 EXCAVATION BENEATH TANK##3 Soil excavation beneath Tank#13 was terminated at 25',as the excavator could not go any deeper. Odor and color seemed to be gone at that depth. The excavation in the north wall was terminated, as it jeopardized the integrity of a utility pole and storm drain. The soil sample was taken in an area about 6' from the bottom of the excavation, and discoloration was in an apparent "pocket." Discoloration was removed .a above, below, and to both sides of the area sampled. The pocked encompassed an area approximately 6' in diameter. 4.0 SOIL COMPOSMON Soil composition to a depth of 25 feet consisted of a plastic, heavy clay, which is bypical in the Stockton area. No other soil types were encountered or observed in the excavation. Depth to first groundwater is 57', based on the groundwater contour map from.the Department of Water Resources for the Spring of 1989 and Historical Groundwater Levels in San Joaquin County Department of Water Resources, April 1990. Groundwater is believed to be unaffected, based on analytical data, distance to groundwater, and type of contaminants in the soils. 5.0 aGROUADWATER GRALI+lF.NT Actual gradient in this area is south to southwest, according to the Department of Water Resources Spring of 1989 groundwater map. 6 0 PROD MYON WELT. There is a production water well at this site owned by Union Ice. No records could be -- -- - - -- --found as to when-the-well-was drilled or-who drilled-it.--Samples-were takenatthe- --- --- -_ ----- request of the San Joaquin Health Department(results are in the Figures section). No contaminants were found in this well. We were not able to access the well to measure either depth to groundwater or depth of the well. s�