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LSA ASSOCIATES, INC. JULY 2010 INITIAL STUDY/MITIGATED NEGATIVE DECLARATION FIRST STREET BRIDGE REPLACEMENT PROJECT CITY OF SANTA ANA treatment facilities would occur as a result of the project. No impact is expected, and no mitigation is required. C. Require or result in the construction of new storm water drainage facilities or expansion of existing facilities, the construction of which could cause significant environmental effects? Less than significant impact. The proposed project will not involve the need for an additional storm water drainage system. The proposed project would widen the bridge to accommodate two additional lanes. The site under the bridge is channelized and therefore, addition of two lanes will not add new impervious surface to the site. However, the widening of First Street 300 feet east and west will add some impervious surface to the project site. The project would increase the impervious surface area by approximately 0.30 ac compared to the existing roadway facility. However, the rate and volume of surface water runoff from the facility would not increase substantially and would not cause flooding in the area. Therefore, impacts related to capacity of the existing stormwater drainage system would be less than significant, and no mitigation is required.. D. Are sufficient water supplies available to serve the project from existing entitlements and resources or are new or expanded entitlements needed? No impact. The proposed project is a bridge replacement and street widening and does not involve incorporation of any dwelling units. No demand for potable water currently exists on the site. The proposed land use type will be the same as under existing conditions, and therefore would no introduce demand for potable water. Therefore, no impact is expected and no mitigation is required. E. Result in the determination by the wastewater treatment provider which serves or may serve the project that it has adequate capacity to serve the project's projected demand in addition to the provider's existing commitments? No impact. There is no release of wastewater on the project site. The proposed project will also not result in the additional release of wastewater. Therefore, no impact is expected, and no mitigation is required. F. Is the project served by a landfill with sufficient permitted capacity to accommodate the project's solid waste disposal needs? Less than significant impact. The city of Santa Ana is served by the three Orange County sanitary landfills: Olinda Alpha, Frank R. Bowerman, and Prima Deshecha. These landfills currently have the capacity to absorb additional solid waste generated during the demolition of the First Street bridge. The proposed project will comply with Assembly Bill 939 (AB 939), which mandates local jurisdictions to meet numerous diversion goals and thus reduce impacts to landfills. The proposed project will comply with the County Source Reduction Ordinance and will further reduce impacts to landfills by recycling construction materials where feasible. The materials from the demolition will be disposed of at one of the local landfills. Construction and demolition waste is the project's primary solid waste contribution. No additional solid waste is expected to be generated during the construction 07/25/10 ,,PADMJ0701\MND\4.0 Environmental Analysis.doc» 41 ' OVA 4-43