ARCHIVED REPORTS LEC APPLICATION FOR CERTIFICATION

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5.1 E:CONSTRUCTION EMISSIONS AND IMPACT ANALYSIS • Exhaust from automobiles used by workers to commute to the construction site. To determine the potential worst-case daily construction impacts,exhaust and dust emission rates have been evaluated for each source of emissions. Maximum short-term impacts are calculated based on the equipment mix expected during Month 16 of the construction schedule.' Annual emissions are based on the average equipment mix during the peak 12-month period out of the overall 24-month construction period. 5.1E.1.2 Linear Facilities The linear facilities that will be constructed for the proposed project include a new recycled water pipeline that will be constructed in the utility corridor that links the power plant with the adjacent water treatment plant and a 2.5 mile long natural gas pipeline. These linears will be constructed prior to or simultaneously with the construction of the project. 5.1E.2 Available Mitigation Measures The following typical mitigation measures are proposed to control exhaust emissions from the diesel heavy equipment and potential emissions of fugitive dust during construction of the project. • Unpaved roads and disturbed areas in the project construction site will be watered as frequently as necessary to prevent fugitive dust plumes. The frequency of watering can be reduced or eliminated during periods of precipitation. • The vehicle speed limit will be 15 miles per hour within the construction site. • The construction site entrances shall be posted with visible speed limit signs. • Construction equipment vehicle tires will be inspected and washed as necessary to be cleaned free of dirt prior to entering paved roadways. • Gravel ramps of at least 20 feet in length will be provided at the tire washing/cleaning station. • Unpaved exits from the construction site will be graveled or treated to prevent track-out to public roadways. • Construction vehicles will enter the construction site through the treated entrance roadways,unless an alternative route has been submitted to and approved by the Compliance Project Manager. • Construction areas adjacent to any paved roadway will be provided with sandbags or other measures as specified in the Storm Water Pollution Prevention Plan (SWPPP) to prevent run-off to roadways. • Paved roads within the construction site will be swept at least twice daily (or less during periods of precipitation) on days when construction activity occurs to prevent the accumulation of dirt and debris. See calculations in Attachment 5.1 E-1. 5.1 E 2 SAC/371322/082330017(LEC-5.1 E_APPENDIX.DOC)