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KLEANFELDER Bright People.flight Solutiom Environmental Im acts Air Quality Impacts of Project Construction The proposed project would involve disturbance of the project site and potential for dust generation during construction activities. The most significant toxic emission related to construction activities is diesel exhaust particulate from diesel-fueled mobile equipment. iConstruction PM10 emissions were not modeled as these emissions are considered relatively small and temporary when compared to the operational emissions. Particulate matter emissions are controlled under the SJVAPCD's Regulation VIII; compliance with these regulations is required by mitigation measures presented below. Health risks from diesel-fueled equipment are typically evaluated for stationary sources tas potential cancer risks are large only when there is very long continuous exposure over one's lifetime (i.e., 24 hours per day over 70 years). Construction emissions are expected to occur over a relatively short time, and sensitive receptors are not located near enough to the site to be directly affected. Therefore, the impacts are considered to be less than significant if reasonable available control measures are applied iLevel of Significance: Potentially significant Mitigation Measures: 1. During construction, the ODS will comply with required control measures specified in San Joaquin Valley Air Pollution Control District (SJVAPCD) Regulation VIII (Fugitive Dust Rules), including compliance with the following mitigation measure 2 through 8. 2. Visible Dust Emissions (VDE)from construction, demolition, excavation or other earthmoving activities related to the project shall be limited to 20% opacity or less, as defined in SJVAPCD Rule 8011, Appendix A. The dust control measures specified in Mitigation Measures 3 through 8 shall be applied as required to maintain the VDE standard. 3. Pre-water all land clearing, grubbing, scraping, excavation, land leveling, grading, cut and fill, and phase earthmoving. 4. Apply water, chemical/organic stabilizer/suppressant, or vegetative ground cover to all disturbed areas, including unpaved roads. 5. Restrict vehicular access to the disturbance area during periods of inactivity. 6. Apply water or chemical/organic stabilizers/suppressants, construct wind barriers and/or cover exposed potentially dust-generating materials. 121339/ST011 R226 3-18 October 14, 2011 Copyright 2011 Kleinfelder