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00 <br /> areas that may be found during construction would need to have a contingency. See below for requirements for post <br /> closure land use.Robert <br /> Robert McClellon, Program Coordinator REHS <br /> San Joaquin County Environmental Health Department <br /> Ph (209)468-0332 <br /> Fax(209)468-8392 <br /> 21190. CIWMB- Postclosure Land Use. (T14:Section 17796) <br /> (a) Proposed postclosure land uses shall be designed and maintained to: <br /> (1) protect public health and safety and prevent damage to structures, roads,utilities and gas monitoring and control <br /> systems; <br /> (2) prevent public contact with waste, landfill gas and leachate; and <br /> (3) prevent landfill gas explosions. <br /> (b)The site design shall consider one or more proposed uses of the site toward which the operator will direct its efforts, <br /> or shall show development as open space,graded to harmonize with the setting and landscaped with native shrubbery <br /> or low maintenance ground cover. <br /> (c)All proposed postclosure land uses,other than non-irrigated open space, on sites implementing closure or on <br /> closed sites shall be submitted to the EA, RWQCB, local air district and local land use agency.The EA shall review and <br /> approve proposed postclosure land uses if the project involves structures within 1,000 feet of the disposal area, <br /> structures on top of waste, modification of the low permeability layer, or irrigation over waste. <br /> (d)Construction on the site shall maintain the integrity of the final cover, drainage and erosion control systems,and <br /> gas monitoring and control systems.The owner or operator shall demonstrate to the satisfaction of the EA that the <br /> activities will not pose a threat to public health and safety and the environment.Any proposed modification or <br /> replacement of the low permeability layer of the final cover shall begin upon approval by the EA,and the RWQCB. <br /> (e) Construction of structural improvements on top of landfilled areas during the postclosure period shall meet the <br /> following conditions: <br /> (1) automatic methane gas sensors, designed to trigger an audible alarm when methane concentrations are detected, <br /> shall be installed in all buildings; <br /> (2) enclosed basement construction is prohibited; <br /> (3) buildings shall be constructed to mitigate the effects of gas accumulation,which may include an active gas <br /> collection or passive vent systems; <br /> 3 <br />