PSOMAS (2)-A-2020-075-03 - Laserfiche WebLink

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the station's capacity and were a condition of a development agreement to construct a residential development in the foothills of Yorba Linda. Psomas is designing this project to YLWD specifications with funding shared between BlackRock and the District. This project consists of removing one 200-GPM pump and pump can within an existing station, and replacing it with an 1,800-GPM, VFD-driven pump. In conjunction with this pump replacement to improve fire -fighting capacity in this pressure zone to be funded by the developer, the District requested that Psomas also replace all existing, outdated electrical and control equipment to be installed in a new, separate electrical room, add a gas -driven emergency generator, add a fence around the perimeter of the site, and replace a damaged meter vault and the meter within the vault. All this work needs to be carefully sequenced and scheduled within a limited shutdown window to minimize downtime for the pump station. CIP 17-416 Sewer Improvements Hermosa Beach, CA CLIENT CONTACT: City of Hermosa Beach Public Works Department Lucho Rodriguez, PE, Deputy City Engineer (310) 318-0210 YEAR COMPLETED: 2019 KEY PERSONNEL: Joseph Boyle I Maira Salcedo Benjamin Halbach i Joseph Barrera Chris Riehle Through an On -Call contract with the City of Hermosa Beach, Psomas provided engineering services for the CIP 17-416 Sewer Improvements project, which included approximately 2,700 LF of sewer lining, 9,200 LF of sewer replacement, and 39 manholes to be rehabilitated. The project was organized into four distinct areas, including Area 1: Highland; Area 2: Harper Avenue; Area 3: Hermosa Avenue; and Area 4: 24th Street. These areas were derived from the 2017 Sewer Master Plan (SMP). Psomas evaluated existing conditions of these selected sewer segments and confirmed the SMP's recommendations or provided supplemental recommendations as appropriate. Our NAASCO certified engineers evaluated the CCTV reports and videos and categorized each of the segments into one of the following: 1) Remove and Replace, 2) Point Repair, 3) Line Pipe, 4) Deposit/Root Removal, and/or 5) No Repair. We found that, although the City's sewer system is reaching the end of its design life, the majority of the concrete pipe is not structurally compromised and is in good overall condition. As a result, we were able to reduce the amount of remove and replace from 9,200 LF to 1,850 LF and increase the amount of lining from 2,700 LF to 7,900 LF, therefore, offering the City significant cost savings. In addition, Psomas performed a field evaluation of approximately 90 sewer manholes within the project area to determine if the SMP recommendations for improvement are confirmed or need supplemental modifications. The final design plans resulted in 1,850 LF of remove and replace segments; 100 LF of point repairs at about 23 locations; 7,900 LF of lining; 700 LF of deposit and root removal; and about 650 LF where no repair or rehabilitation was required. PSOMAS RPNO 19 lor,