Laserfiche WebLink
5.9 PUBLIC HEALTH <br /> TABLE 5.9-2 <br /> Top Ten TACs Emitted by All Sources in the San Joaquin Valley Air Basin <br /> 2006 Levels and Risks <br /> Annual Average <br /> 2006 Emissions Concentration Potential Carcinogenic Risk <br /> TAC (tons/year) (ppbv) (in 1 million) <br /> Acetaldehyde 1,761 1.3 6 <br /> Benzene 1,789 0.36 34 <br /> 1,3-Butadiene 503 0.07 26 <br /> Carbon tetrachloride 0 0.10 (2003) 26 (2003) <br /> Chromium, hexavalent 0.22 0.05 ng/m3 8 <br /> Para-Dichlorobenzene 147 0.15 10 <br /> Formaldehyde 4,396 2.8 20 <br /> Methylene chloride 429 0.11 <1 <br /> Perch loroethylene 588 0.03 1 <br /> Diesel PM 7,695 1.3µg/m3(2000) 390(2000) <br /> Source: CARB. The California Almanac of Emissions and Air Quality,2008 Edition, <br /> http://www.arb.ca.gov/aqd/almanac/almanac08/almanac2008all.pdf <br /> µg/m3= micrograms per cubic meter <br /> ng/m3= nanograms per cubic meter <br /> ppbv= parts per billion by volume <br /> 5.9.4 Environmental Analysis <br /> This section is organized to discuss the sources and different kinds of air emissions <br /> associated with construction and operation of LEC (see Section 5.1,Air Quality),the <br /> methodology used in health risk assessment,and the results of the assessment of potential <br /> health risks from the project. Other potential public health risks associated with the project <br /> are discussed in different sections of the AFC as follows: <br /> • Potential exposure to wastes generated by the project is discussed in Section 5.14,Waste <br /> Management. <br /> • Potential exposure to the hypothetical accidental release of anhydrous ammonia onsite <br /> or during offsite transport is discussed in Section 5.5,Hazardous Materials Handling. <br /> • Potential safety and health impacts relative to the work environment of project <br /> employees are discussed in Section 5.16,Worker Health and Safety. <br /> • Potential exposure to transmission line electric and magnetic fields is discussed in <br /> Section 3.3,Transmission System Safety and Nuisance. <br /> Project emissions to the air will consist of combustion by-products from the natural gas- <br /> fired turbine and the auxiliary boiler, and of particulate matter from cooling tower drift. <br /> After dispersion to ground-level,inhalation is the main pathway by which air pollutants can <br /> potentially cause public health impacts. Other pathways,including ingestion of soil, <br /> homegrown vegetables,and mother's milk, and dermal absorption, also are evaluated for <br /> potential exposure. As discussed below,these health risks are not significant. <br /> SAC/371322/082340007(LEC_5.9_PUBLIC_HEALTH.DOC) 5.9-9 <br />