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6.6 TRANSPORTATIONAND DISPOSAL Contractor will obtain approvals from the landfill facilities to accept the excavated soil prior to initiating the removal action. Copies of the analytical reports will be submitted from previous site investigation activities and if needed, additional samples will be collected for analyses requested by the TSD facility. Samples will be submitted to an EPA approved laboratory. Excavated soil will be profiled on site prior to shipment to the appropriate disposal site. Soil profiled as hazardous waste will be documented with the Uniform Hazardous Waste Manifest form to track the movement of waste soils from the point of generation to the point of ultimate disposition. Non-hazardous waste will be taken to a pre-approved Class II facility. All waste soil will be transported by an appropriately licensed waste hauler. If any soil samples have regulated compounds at concentrations greater than TCLP and/or STLC the soil will be disposed of at the Class I facility such as Kettleman City. Once a truckload of soil has been staged, the soil can be loaded into the truck for transport to the disposal facility. The truck driver shall cover the trailer with tarps, and complete the manifests prior to leaving the site, and shall follow the transportation plan during the transport of the soil to the disposal facility. The transportation plan will specify a route that the trucks will follow while transporting the soil to the disposal facility. All vehicles will be decontaminated prior to leaving the work area. Transportation of waste soils will be on arterial streets and/or freeways, minimizing any potential impact on the local neighborhood. Trucks will be staged to avoid impacts on the local streets and timed to avoid rush traffic hours. All loaded trucks will be inspected, decontaminated and tarped prior to leaving the site. Truck tires leaving the site will be cleaned to remove soil and debris. Trucks will depart the facility in accordance with the Traffic Control Plan submitted by the General Contractor and approved by appropriate agencies. 7.0 MONITORING AND RECOVERY WELL INSTALLATION To monitor the groundwater conditions following UST removal and over-excavation, three (3) monitoring wells are proposed for installation in the vicinity of the USTs. Well locations will be identified after the completion of the UST excavation and backfilling but they will be placed such that measurement of the groundwater levels will provide estimates of the groundwater flow directions and gradient. In addition, a fourth (4"')monitoring/recovery well will be installed within the area currently occupied by the USTs for the purpose of measuring residual free product, if any and removing petroleum product and/or groundwater containing elevated concentrations of petroleum hydrocarbon compounds. Well drilling permits will be obtained from the San Joaquin County Environmental Health Department prior to the commencement of drilling activities. The well borings will be drilled to an approximate depth of 40 feet below ground surface using a truck-mounted rotary drill equipped with hollow-stem augers. Drilling will be performed by a California-licensed well driller and all drilling activities will be performed in accordance with applicable state and local regulations. Drilling activities and borehole logging will be supervised by a California-registered geologist. Details of the 12