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3.2 SOIL TRANSPORTATION 3.2.1 Stockpiled Soil Loading On February 24, 1997, TPS manually loaded the stockpiled soil into transport trucks for delivery to the thermal treatment plant. 3.2.2 Transportation to the Thermal Treatment Plant On February 24, 1997, the trucks transported the soil from the site to the TPS treatment facility. At the thermal treatment plant, the trucks entered the plant area and were weighed full. After the weight of the trucks and soil was determined,the trucks proceeded into the storage building where the soil was off-loaded and positioned into a partitioned area to await treatment. Each truck was then weighed empty and a weigh ticket was issued to the driver. It was estimated that the total soil weight was 75.25 tons. The weigh ticket documentation is presented in Appendix B. L 3.3 THERMAL SOIL TREATMENT 3.3.1 Description of the Thermal Desorption Unit TPS' thermal treatment plant consists of a fixed thermal desorption unit designed to remove petroleum hydrocarbons from soil. The unit has the capacity to process a variety of soils containing varying concentrations of petroleum constituents. The thermal unit is designed to ensure that the processed soil and air emissions meet the requirements of the various local regulatory agencies. 3.3.2 Description of the Thermal Process The thermal remediation process involved a two-step program including material preparation and subsequent thermal treatment. The material preparation program involved loading the soil from the stockpile storage area in the storage building into the screening plant to remove large debris including;plastic,wood,metal, paper,concrete,and oversized rock material which exceeds 2 %z inches in size. The soil was passed through the screening plant several times until all soil was separated out and conveyed to a stock pile to await thermal treatment. �' 6