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Fork of Little I ohns Creek, h�>wever this is not anticipated Li) be �I signilican# impact. ]n addition, the project would require substantial amounts of Ck)ver material. This would require the removal and storage of topsoil and underiying Soil Irml) adjacent pwilerties, and, possibly, from off-Site areas. These activities could reult ill er r hm \vhich i5 mitigated to a less-than- significant level in fyllhgati�rn MeaSures J3(�I) and K 4(a) <rnd (b) til the 'Mitigation Monitoring/Reporti.ng Program. c. Less than Significant Impact \vith Mitigation Incorporation. See diScuSSion under item (a), above. d. Less than Significant: Site soils include some clays that may be expansive, however this soil would be excavated and, in any case, would not adversely affect project features. Soil would be tested to meet applicable standards (see Project Description) prior to use for cover and liners. Therefore this impact would be less than sign4ficant. ' 4 e. Less than Significant: Sanitary `vaste\vater generated on the Site Nva>ul I be trucked tiff site for treatment (EIR p. 111.C.3) VII. HAZARDS AND HAZARDOUS MATERIALS a. Less than Significant Impact with Mitigation Inciri'p(}rat.ioii: The project would involve the use cif hazardous materials during the expansion consti-LIChorn phase and subsequent r� operational phase,-and \ orker exposure to chemical contaminants and particulates during landfill operations may exceed levels protectiVV of human health or safety. Construction activities would include earthmo>ving, paving, possible dewatering, coynstruction and painting. Solid waste could be generated Iron) land clearing; and demorliticu� orf exist-,, S structures. Hazardous materials used in conStrUCtion include acids, lime, glt3es, paints, Solvents, and curing compounds. During operations, Vehicle fueling and toiuipment maintenaiwe and cleaning WOUld incur where diesel fuel, gasoline, oil, and grease �%ould br StLrred rnd used on-Site. Additional hydrologic and hydrochemical studies conducted since the 1994 EIR was prepared have better delineated the groundNvater plume, using models to predict potential future seepage of VOC (volatile orgallic compounds) contanihlants into the underlying aquifer(s). All hazardous materials would be handled in accordance with local state and federal regulations,and the site SWPPP (Storm 1Nate.r Pollutit).n Prevention Plan) and Operations Manual will provide guidance in the use and handli3ig of hazardous materials during the operations of the facility. Regulatory guidance originating after the 1994 EIR will be implemented. Compliance with the se regulations, the SWFPP, the Operations Manual, and Mitigation Measures L.1.(a), (b), (c), (d) (e), (f),and (g) of the Mitigat.ioi� lvlinituri.ng/Reporting Program would reduce this impact to a less-than-significant level. Hazardous waste found in the municipal solid waste 11light inadvertently be brought to the landfill for disposal. The City of Stockton has implemented components of a Household Hazardous Waste Element (HHWE) in conjunction with the County since the 1994 EIR. No significant change from the 1994 EIR conclusions is expected. There have been no changes in 29CFR. Hazardous waste identification procedures and programs, such as the City HHWE program, may have changed since 1994; however, the mitigation program for identifying the presence of hazardous waste remains the same in terms of its stated goals. Mitigation Measures L.2(a), (b), and (c) of the Mitigation rVlonitoring/Repo r ir)g Pry>gram would reduce this impact to a less-than-significant level. b. Less than Significant Impact with Mitigation ]r�corporation: Spil1S, collisupsets ur other r -22- w a s