SITE INFORMATION AND CORRESPONDENCE

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Mr. Eric I Holm March 26, 1997 Page 6 (b) The areas up and downgradient(south) of these two buildings. (9) Building No. 10. Hydraulic splicing presses were historically operated in this building prior to the building's conversion to a storage facility. It was owned and operated as a fruit packing company until it was purchased by Holz. Elevated levels of TCE were detected in the area adjacent to the building, therefore, soil gas samples at 10 and/or 20 feet bgs should be collected at locations downgradient(south and west) and beneath the building. Additional soil gas samples at 30 feet bgs may be collected based on results of the shallow soil gas samples to determine the extent of the contamination. Representative soil samples should be collected to determine if soils are contaminated with metals and TPH. (10) Buildings No. 11, 12, 13, and 14. Building No. 11 contains the main administrative offices, Building No. 12 contains the engineering offices including a machine shop. Buildings No. 13 and 14 consist of the slide lag department. (a) To determine if soil is contaminated with VOCs, semi-VOCs, metals, and TPH, soil and soil gas samples at 10 feet bgs should be taken in areas beneath and downgradient(south) of the machine shop located in Buildings No. 12 and 13; and (b) Additional soil gas samples at 10 and/or 20 feet bgs should be collected in the area up and downgradient of Buildings No. 11, 12, and 13 to delineate the extent of VOCs contaminations which may have been migrated from upgradient locations. (11) Building No. 16. This building stores empty drums, hazardous materials including solvents such as PCE, MEK. Delta proposed 3 soil gas sampling locations in areas around the building. Methylene chloride and toluene were detected in the soil samples collected by BEM. One of the three proposed sampling location should be moved to inside of the building for collection of both soil and soil gas samples.