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San Joaquin County Environmental Checklist Mitigation Measure AIR-1: Comply with SJVUAPCD Regulation VIII. To control the generation of construction-related PM 10 emissions,the project applicant will comply with SJVUAPCD Regulation VIII, as summarized in Table 2-4. Table 2-4. SJVUAPCD Regulation VIII Control Measures for Construction Emissions of PM 10 The following controls are required to be implemented at all construction sites. ■ All disturbed areas,including storage piles that are not being actively utilized for construction purposes,shall be effectively stabilized of dust emissions using water or chemical stabilizer/suppressant and covered with a tarp or other suitable cover or vegetative ground cover. ■ All onsite unpaved roads and offsite unpaved access roads shall be effectively stabilized of dust emissions using water or chemical stabilizer/suppressant. ■ All land clearing,grubbing,scraping,excavation,land leveling,grading,cut-and-fill,and demolition activities shall be effectively controlled of fugitive dust emissions by applying water or by presoaking. ■ With the demolition of buildings up to six stories in height,all exterior surfaces of the building shall be wetted during demolition. ■ When materials are transported off site,all material shall be covered,or effectively wetted to limit visible dust emissions,and at least 6 inches of freeboard space from the top of the container shall be maintained. ■ All operations shall limit or expeditiously remove the accumulation of mud or dirt from adjacent public streets at the end of each workday. (The use of dry rotary brushes is expressly prohibited except where preceded or accompanied by sufficient wetting to limit the visible dust emissions. Use of blower devices is expressly forbidden.) ■ Following the addition of materials to,or the removal of materials from,the surface of outdoor storage piles, said piles shall be effectively stabilized of fugitive dust emissions utilizing sufficient water or chemical stabilizer/suppressant ■ Within urban areas,trackout shall be immediately removed when it extends 50 or more feet from the site and at the end of each workday. ■ Any site with 150 or more vehicle trips per day shall prevent carryout and trackout. Source: SJVUAPCD 2002. Landfill Gas. MSWs placed in landfills such as the NCRC&SL undergo natural chemical and biological decomposition. The byproducts of biological decomposition of organic wastes are solids, liquids,and gases. The byproducts of aerobic(presence of free oxygen)decomposition of MSW are carbon dioxide, water,and nitrates. Typical primary byproducts of anaerobic(lack of oxygen) decomposition are methane,carbon dioxide,water,organic acids,nitrogen, ammonia, iron sulfides,manganese,and hydrogen. LFG also contains trace quantities of VOCs.The percentage by volume of methane in landfill gas may range from 50%to 60%,and carbon dioxide may range from 30%to 50%(Boyle 1977). Methane production from MSW will continue for periods ranging from a few years to hundreds of years,depending on specific environmental parameters: refuse composition,oxygen present,moisture content,pH,alkalinity,and temperature. Notice of Preparation for the June 2006 North County Recycling Center and Sanitary Landfill 2-19 AS 06307.06 Permit Revision