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Abbreviations and Acronyms <br />AAS <br />Ambient Air Quality Standards <br />AB <br />Assembly Bill <br />ADT <br />Average Daily Traffic <br />AMP <br />Air Quality Management Plan <br />AT CM <br />Airborne Toxic Control Measures <br />bgs <br />below ground surface <br />BMP <br />Best Management Practices <br />CAA <br />Clean Air Act <br />DAAS <br />California Ambient Air Quality Standards <br />ltrans <br />California Department of Transportation <br />GARB <br />California Air Resources Board <br />BC <br />California Building Dodo <br />CAA <br />California clean Air Act <br />D R <br />California Code of Regulations <br />EA <br />California Environmental Quality Act <br />CFR <br />Code of Federal Regulations <br />1P <br />congestion Management Program <br />DNEL <br />Community r Noise Equivalent Level <br />co <br />carbon monoxide <br />dB <br />decibel <br />dB <br />- weighted decibel <br />EIR <br />Environmental Impact Report <br />FHWA <br />Federal Highway Administration <br />FRA <br />Federal Railroad Administration <br />FTA <br />Federal Transit Administration <br />HCM <br />Highway capacity Manual <br />lP C <br />Intergovernmental Panel on climate Change <br />Ldn <br />day -night noise level <br />Leq <br />equivalent continuous noise level <br />LOB <br />Level of Service <br />LSAN <br />Los Angeles to San Diego <br />LST <br />Localized Significance Thresholds <br />NAAQS <br />National Ambient Air Quality Standards <br />NP <br />Notice of Preparation <br />r!1B <br />F'airhavenlLincoln and Santa l r i col n In rs c- io n o i� fi ions City of Santa Ana a Page v <br />SuPlement to the Santa Ana Second Main Track ro ec- I Resolution No. 2009 -034 <br />Page 11 of 130 <br />