55A - RESOLUTION CERTIFYING EIR SAN LORENZO SEWER LIFT STATION

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Chapter 3 Findings Regarding Project Alternatives Attachment "A" to the Project. The construction schedule for this alternative would otherwise be similar to the Project. This alternative would require construction activities within and adjacent to the South Bristol Street/West Segerstrom Avenue intersection; however, the duration of construction activities within the intersection would be reduced to one (1) week under this alternative. Traffic control associated with demolition of the existing lift station facility still would require up to two weeks; accordingly, traffic control within the intersection of South Bristol Street/West Segerstrom Avenue would occur for a total duration of three weeks, rather than the five weeks associated with the proposed Project. In addition, this alternative would not require implementation of Construction Configurations B.1, B.2, or C.1. However, this alternative would require the installation of new sewer facilities beneath the existing paved right -of -way of South Bristol Street that are not proposed as part of the Project (i.e., to the south of the South Bristol Street/West Segerstrom Avenue intersection). The segment of South Bristol Street between this site and the existing lift station facility contains a 20 -inch OCSD trunk sewer, a 36 -inch MWD pipeline, a 16 -inch water main, and a SCE /MCI Duct Bank. These utilities would require special support during construction of the new 18 -inch sewer, as the new sewer line would need to be installed at a depth of approximately 16 feet, and this depth would increase with distance from the existing facility. Construction along this segment of South Bristol Street would require supporting the utilities from the top of the trench and /or the use of trench boxes /shields, which would elongate the construction schedule. Due to these existing utility constraints beneath South Bristol Street, portions of this roadway would need to be closed to accommodate construction associated with this alternative, which has the potential to result in adverse effects to vehicular circulation. Implementation of this alternative would otherwise be similar to the proposed Project during construction conditions. Development of a lift station at Alternative Site No. 17 would require the City to acquire private property to accommodate the proposed lift station. In addition, this alternative would require the City to acquire a temporary construction easement to facilitate construction of the proposed lift station. 3.4.19.2 Summary Comparison of Environmental Effects The environmental effects of constructing the proposed lift station at Alternative Site No. 17 in comparison to the proposed Project site are shown in Final EIR Table 5 -1 and described in detail in RDEIR Section 5.4.19. This alternative would reduce the Project's significant and unavoidable impact associated with Construction Configuration C.2 by two weeks; however, this alternative would create a significant and unmitigable near -term impact to the capacity of South Bristol Street for a period of approximately 46 days, which is an increase in duration as compared to the twenty - five (25) days of construction during which the proposed Project would create a significant unavoidable impact to transportation /traffic at the South Bristol Street /West Segerstrom Avenue intersection. As such, impacts to transportation /traffic would be greater at Alternative Site No. 17 as compared to the proposed Project site, and mitigation would not be available to reduce these effects to less than significant levels because there is no way to construct this alternative without impacting travel lanes on South Bristol Street. Furthermore, construction of a lift station at Alternative Site No. 17 would exacerbate an existing parking deficiency at this site both during construction and long- term operation. Near- and long -term impacts to parking at Alternative Site No. 17 would be a significant and unmitigable impact. Construction activities at Alternative Site No. 17 also would San Lorenzo Lift Station EIR (Project No. 06 -3510) 3 -37 CEQA Findings of Fact /Statement of Overriding Considerations 55A -76