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Draft Environmental Impact Report Page IV.E-ll Forward Inc. Landfill Expansion Project cond The the upper portions of the landfill, particularly when lack make dmsplaced by saturateethane a dangerousgas at if not higher density, flammability and 1k of odor collected over time. Explosions and were on worker health have occurred at used to ow lying areas w h n the landfillgwhere landfills, most often when workerp methane accumulated (Everett, Wilson and Hoylman, 1984). Along the northern landfill boundary there is a 30-well Landfill gas collection system where methane and other gas emissions are monitored and controlled. Further augmentation of the gas collection system is planned as part of the proposed project phases in the new expansion areas. The applicant's consultants report that, in addition to reducing the impact of a methane gas-related explosion and fire hazard, the expansion of the gas collection willver,remove isluncl unclear if Os approach CS would impacting groundwater quality (Geologic,2008). However, reduce the impact to a less than significant level. The following procedures are proposed as part of the project: • Where required by State 1 beFntalledral eext extending to the new gea monitoring,as t e expanding and collection system will landfill and operating in conformance with applicable regulations. • The existing gas extraction system, or an equivalent system,will continue to operate. • Regular gas monitoring will be conducted to prevent explosive or toxic gas accumulation in onsite combustible gas detecbuildings or beneath tion and alarmporary ;system hforastrructu es at will install an au the site. • The landfill operator will not construct or otherwise locate any structure in an area of known landfill gas build-up. • 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 suggested: Mitigation Measure E.4: Landfill gas monitoring shall include thetoo the organic exposure to on ounds in order to determine the amount of contaminant recovery, and potential site personnel. ed procedures and this mitigation measure would reduce the Implementation of the propos impact to a less-than-significant level. impact E.5: Solid waste pathogens could spread by vectors. Refuse in landfillsarae s Movers such as rats, moles, gulls, etc.that can carry infectious pathogens, disease an par vectors over time would likely be attracted to the landfill due to its expansion over time. This human exposure to the pathogens carried by the vectors. Could increase the likelihood of The potential public health and nuisance problem from vectors is a potentially significant impact. The following procedures are proposed as part of the project: r • 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.