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Item No. 1 PC : 3-10-88 UP-88-20 Page 6 Contaminated soil will be transported to the project site by dump truck for processing. The applicant indicates that a small tractor will be used on the concrete treatment slab to mix and aeriate the soil . Once the soil is "clean, " it will be loaded on haul trucks by the tractor for delivery to fill sites or cropland. All operations will be restricted to daylight sours . The potential exists for spillage of the contaminated soil material during the unloading process. In addition, mixing of the material during the treatment process may also result in spill-over . In order to ensure containment of the material , a condition of approval is proposed which would add a perimeter concrete driveway and containment curb to the treatment slab. Process water will be pumped from an existing on-site irriga- tion well . No runoff from the decontamination operation is expected due to the controlled water spraying and mixing pro- cess. Storm runoff will be collected on-site and retained in a separate storm retention pond. In order to control the type and level of toxicity of each batch, samples will be tested regularly by a certified labora- tory and the results transmitted to the Local Health District and the State Department of Health Services. Treated soil will not be removed from the facility unless both agencies issue their clearance permits. ENVIRONMENTAL CONSIDERATIONS : An Initial Study was prepared on January 8 , 1988 , and no signifi- cant environmental effects were identified. On that basis, a proposed Negative Declaration has been prepared for the Commission' s consideration. Major issues evaluated in the Initial Study were : ( 1 ) potential for spillage , (2 ) depth to groundwater, ( 3) haul routes, (4) air quality degradation, ( 5 ) noise generation, and ( 6) area resident safety. Proposed con- ditions of approval have reduced or eliminated these issues to insignificant levels .