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Draft Supplemental Environmental Impact Report Page IV.E-14 Forward Inc. Landfill 2018 Expansion Project • All site personnel who work in permanent structures will be trained to use and respond to the landfill gas monitoring and alarm system. This impact is still considered potentially significant;therefore the following additional mitigation measure is identified: Mitigation Measure E.4: (Same as the 2013 EIR Mitigation Measure E.4.) Landfill gas monitoring shall include the volatile organic compounds in order to determine the amount of contaminant recovery, and control potential exposure to onsite personnel. Implementation of the proposed procedures and this mitigation measure would reduce the impact to a less-than-significant level because it allows the County and applicant to control potential exposure of personnel to hazardous gases. Impact E.5: Solid waste pathogens could be spread by vectors. (Same as 2013 EIR Impact E.5.) Refuse in landfills attracts vectors such as rats,moles, gulls, etc. that can carry infectious pathogens, disease and parasites. More vectors over time would likely be attracted to the landfill due to its expansion over time. This could increase the likelihood of human exposure to the pathogens carried by the vectors. The potential public health and nuisance problem from vectors is a potentially significant impact. The following procedures are proposed as part of the project: • The landfill operator will follow legally required daily or alternative cover practices. • The landfill will continue to ban intact tires (which collect water and serve as a breeding ground for vectors)and large dead animals from disposal at the landfill. • Existing measures to discourage gulls from the landfill will be continued. • Appropriate landfill personnel will periodically monitor the landfill for the presence of vectors, and landfill inspections will be documented in the landfill operations administrative file. Implementation of these procedures would reduce this impact to a less-than-significant level and no mitigation is required. Impact E.6: The project would involve the use of additional regulated or hazardous materials during the proposed landfill expansion construction and operation. (Same as 2013 EIR Impact E.6.) Construction activities during the extended life of the landfill would include earthmoving, paving,possible dewatering,various new construction including the new drainage and leachate collection systems, and painting. Solid waste could be generated from land clearing and demolition of existing structures. Hazardous materials used in construction may include acids,