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V � J LIMITED SITE INVESTIGATION ,., THERMO-KING STOCKTON 1950 EAST MINER AVENUE STOCKTON, CALIFORNIA Terracon Project No. 67047008 November 5, 2004 1.0 INTRODUCTION V 1.1 Site Description V Site Name Thermo-King Stockton Site Location/Address 1950 East Miner Avenue, Stockton, California Thermo-King occupies the site and current site activities include General Site Description truck repair, truck and equipment steam cleaning, administrative offices, tractor trailer storage, and air conditioning repair. A topographic map is included as Figure 1, and a site diagram is included as Figure 2 of Appendix A. v 1.2 Scope of Work v Terracon conducted a Limited Site Investigation (LSI) at the Thermo-King Stockton facility located at 1950 East Miner Avenue in Stockton, California. At your request, Terracon's LSI was undertaken in response to the results of Terracon's Phase I Environmental Site Assessment (ESA Report No. 60047818 dated September 22, 2004) which identified the following potential recognized environmental condition (REC): • There is an oil/water separator and sump located at the truck wash bay. It appears that the wash bay has been in use for at least 10-15 years. Minor staining was observed on V the concrete surface of the truck wash bay. In addition, evidence of a previous sub- surface investigation is visible near the oil/water separator. Based on the length of time ,. the wash bay has been in use, the presence of this equipment represents a REC. The objective of the LSI was to evaluate the presence of volatile organic compounds (VOCs) . . and total petroleum hydrocarbons (TPH) in the on-site soils (above relevant laboratory reporting limits) as a result of a potential release from on-site steam cleaning activities and the oil/water separator. Terracon's LSI was conducted in accordance with Terracon's proposal dated October 5, 2004, as authorized by Mr. Gary Elkin of Stewart & Stevenson on October 11, 2004. �„ 1