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MOUNTAIN HOUSE SAN JOAQUIN COUNTY MITIGATION MONITORING PROGRAM Impact Mitigation Measure Monitoring Person/ Timing or Requirements Agency Frequency of Responsible 2 —Monitoring' M4.4.2-3 a)Beneficial reuse of sewage sludge shall be implemented to the maximum extent Review of plan. SJCDPW,MHCSD SP An inadequate wastewater sludge treatment possible to minimize sludge disposal at a landfill or at a dedicated site. and disposal system could adversely impact water resources and public health. Scarce b) Interim Disposal. If the sludge meets acceptance criteria of a specific landfill. Review SJCDPW SP municipal landfill space may be occupied by the sludge shall be Initially disposed of at an appropriately permitted landfill. Sludge documentation of sludge if alternative disposal/reuse options shall meet nonhazardous classification and shall be dried to a minimum of 50 sludge disposal. were not aggressively pursued. percent solids prior to disposal at a landfill. The duration of landfill disposal shall not exceed two years from the startup of the activated sludge treatment process, unless the sludge disposal program described in Implementation e)concludes that landfill disposal of wastewater sludge is the only viable option. c)If landfill disposal of the wastewater sludge were proposed,an agreement or"will Review SJCCDD, SP serve"letter with a landfill that would accept the sludge for at least the next five documentation from SJCDPW years shall be provided with the initial Wastewater Sludge Disposal Plan or disposal site. subsequent specific plan. If land spreading or dedicated land disposal were proposed,then guarantees of adequate acres for sludge disposal for at least the next five years must be provided. Provisions for sludge disposal shall be updated annually so that there are always firm provisions for disposal for at least five years into the future. M4.4.2-5 a)The wastewater treatment and storage pond levees shall be capable of Review pond MHCSD DP Failure of the levees around wastewater withstanding a maximum credible earthquake;ponds located within the 100-year design. treatment and storage ponds could cause floodplain shall prevent inundation due to levee failure along Old River or other flooding in the surrounding areas, nearby waterways,be capable of withstanding the effects of flooding,and shall not impair the structural integrity of existing flood control levees. b)The detailed design of the wastewater treatment and storage pond levees shall Review pond SJCBD DP be Included in the Reclamation Plan and initial Development Permit for the design. Wastewater Treatment Plant,and in all subsequent reclamation plans where additional ponds are proposed. The pond levees within the 100-year flood plain shall meet,as a minimum,the requirements of Section 65.10 Mapping of Areas Protected By Levee Systems,44 CFR Ch. 1 and the design standards specified herein. c)The wastewater treatment and storage ponds located within the 100-year Review pond SJCBD DP floodplain shall be set back from existing flood control levees to not interfere with design. inspection,maintenance,or repair of the flood control levees,if applicable. I d)The wastewater treatment and storage pond levees shall be set back an Review pond SJCBD DP appropriate distance from existing flood control levees to ensure that there will be design. no loss of Integrity of the flood control levees. The direct application of reclaimed water for a)No sewage treatment facilities for Mountain House,including storage ponds,and Review of plan. SJCCDD SP irrigating crops in the Primary Zone of the no areas for disposal of sewage effluent or sewage sludge shall be located in the Delta(Fabian Tract)could have a Delta Primary Zone,as defined by Public Resources Code 29728. detrimental or limiting effect on the variety of crops that can be produced.The construction of storage ponds for reclaimed water could have a detrimental effect on delta islands with their peat soils and high ground water levels. PAGE