55A - RESOLUTION CERTIFYING EIR SAN LORENZO SEWER LIFT STATION

Home Browse Search

Chapter 3 Findings Regarding Project Alternatives Attachment "A" at this location would require the City to acquire private property to provide easements for proposed sewer lines. Finally, construction of the lift station at this location would replace currently developed, useable land, in contrast to the proposed Project site, which is vacant and undeveloped. 3.4.20 Alternative Site Location No. 18 (Alternative Site No. 18) 3.4.20.1 Summa[ y of Alternative Site No. 18 Alternative Site Location Number 18 (Alternative Site No. 18) would involve the construction of a new replacement lift station in the parking lot of an existing commercial retail center located at 3300 South Bristol Street (i.e., Target shopping center) in lieu of the proposed Project site. Alternative Site No. 18 is located approximately 0.35 -mile southwest of the proposed Project site. The location of Alternative Site No. 18 is depicted on Final EIR Figure 5 -1. The lift station that would be constructed at Alternative Site No. 18 would include a similar above- ground block structure as the proposed Project. In addition, the lift station at Alternative Site No. 18 would feature similar equipment and appurtenances as the proposed Project. This alternative would require the installation and operation of approximately 62 percent more underground sewer conveyance infrastructure than the proposed Project and it is anticipated that the duration of Construction Phase 11 would be increased by approximately 90 work days (approximately eighteen weeks) as compared to the proposed Project. The substantial increase in construction duration is due in part to the need to cross the existing railroad tracks near the intersection of Alton Road /South Bristol Street, which would require approximately six weeks (30 working days) to complete. 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 and traffic control associated with demolition of the existing lift station facility still would require up to two weeks; accordingly, under this alternative, traffic control affecting 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, and 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, portions of this roadway would need to be closed to accommodate construction associated with this alternative. Moreover, the duration of construction for this alternative site location would greatly increase due to the need to cross the railroad tracks running parallel and north of Alton Avenue. Implementation of this alternative would otherwise be similar to the proposed Project during construction conditions. San Lorenzo Lift Station EIR (Project No. 06 -3510) 3 -39 CEQA Findings of Fact /Statement of Overriding Considerations 55A -78