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TABLE 1.1 (Continued) <br /> Impacts Mitigation Measures <br /> The presence of some clay in the The septic tank and leach field <br /> soil may limit the capacity for should be designed to meet state <br /> septic system uses which could cause (Regional Water Quality Control <br /> deterioration of shallow groundwater Board) and County requirements. The <br /> quality. There is also the poten- concrete containment proposed for <br /> tial for contamination of groundwa- the waste oil recovery area should <br /> ter due to leaching from the uncov- also be lined with a synthetic liner <br /> ered and unpaved location of the because small cracks in the concrete <br /> biomass piles. could become a problem during a <br /> spill . <br /> The biomass piles should be placed <br /> on a concrete pad or some type of <br /> liner to prevent potential leachate <br /> contamination. The nature of <br /> containment should be approved by <br /> the San Joaquin County Department of <br /> Public Works, the San Joaquin Local <br /> Health District, and the Regional <br /> Water Quality Control Board. <br /> GEOLOGY AND SEISMICITY <br /> The proposed project, located in an The design of on-site structures <br /> area of active faults, would likely should comply with seismic require- <br /> experience moderate groundshaking in ments of the current Uniform Build- <br /> its lifetime. The buildings and ing Code. Safety features propoed <br /> other facility structures would be by the applicant such as bolting oil <br /> subjected to structural damage if tanks onto raised concrete pads and <br /> the foundation material and struc- placing a polyethylene membrane <br /> tures themselves were not well-engi- between tanks and concrete pads <br /> neered. This, in turn, could result should help prevent contamination of <br /> in the upset of hazardous materials the environment as a result of an <br /> (namely waste oil) stored on-site. earthquake. <br /> 1-7 <br /> 104-8.R3 4/7/89 <br />