RES 2025036 - Laserfiche WebLink

Element 8 – System Evaluation, Capacity Assurance, and Capital Improvements City of Pleasanton Sewer System Management Plan, July 2025 31 station improvements based on the results of the lift station condition assessments were prioritized and will be scheduled into the City’s long-term CIP. The East Amador Lift Station (EALS) which is owned and operated by Dublin-San Ramon Services District (DSRSD), conveys flow from the City of Pleasanton to the DSRSD Wastewater Treatment Plant. Although DSRSD is responsible for the condition assessment and implementation of improvements needed to this lift station, the City is responsible for funding these improvements. An allocation for those costs will be included in the long-term CIP. 8.2.4: Force Mains Force mains are inspected as discussed in Section 4. Due to the challenges of inspecting force mains, the City will also include an engineering evaluation as part of its long-term CIP process. The evaluation will first include a desktop assessment of the force mains, which will include a review of pipe attributes (alignment, age, material, etc.), geotechnical conditions in the proximity of the force mains, pump cycling data, and break history. This analysis will help identify feasible and appropriate inspection methods for each force main. The inspections will be prioritized based on the same types of factors used for gravity pipe risk assessment. The force main inspections may include visual assessment of pipe alignments, inspection of discharge manholes, ultrasonic pipe thickness testing, and actual internal CCTV inspection or other technology to assess pipe condition. Any force mains that can be CCTV inspected (or partially inspected) may be added to the gravity pipe CCTV inspection program to be conducted by contractors. Once available, needed improvements based on the results of the condition assessments will be prioritized and scheduled into the City’s long-term capital improvement plan as appropriate. Evaluation of the City’s force mains were not performed as part of the City’s current CIP. Budget for these inspections and condition assessments will be included in the long-term CIP currently under development. Results of the inspections will be evaluated, and recommended improvements included in future 2-year reviews and 6-year updates of the long-term CIP. 8.3: Capacity Assessments The City completed a Sewer Capacity Evaluation Report in November 2024 by Woodard & Curran, which summarizes the development of a calibrated hydraulic model used to analyze the capacity of the system, identify areas of capacity deficiencies, and develop recommendations for capacity improvements to be incorporated into the City’s long-term CIP. Note that the City has not had any capacity-related spills from the sewer collection system. 8.3.1: Hydraulic Analysis The hydraulic model was developed in InfoWorks ICM modeling software and includes all active City-owned sewers, lift stations, and force mains in the system. Flows in the model were based on recent winter water use data (to estimate base wastewater flows) and flow monitoring data collected at 14 sites and during the 2022/23 wet weather season. The model