Renovation of a water / sewer project in Santa Monica, California. Conceptual plans call for the renovation of a water / sewer project.

The City of Santa Monica, (referred to hereafter as "the City") is inviting proposals from firms (Proposers) interested in providing professional engineering design and construction oversight services for the Moss Avenue Pump Station (MAPS) and the Santa Monica Urban Runoff Recycling Facility (SMURRF) Rehabilitation Project ("Project"). The City anticipates selecting one firm for the Project. 1.2. Background MAPS The MAPS is a wastewater pumping station owned and operated by the City. MAPS was constructed in 2001 and has a pumping capacity of 34.5 million gallons per day (MGD). It is a critical component of the Coastal Interceptor Sewer (CIS), which moves wastewater along the coast from northern Los Angeles, through Santa Monica, and eventually to the Hyperion Wastewater Treatment Plant. MAPS receives raw sewage from a 60-inch Reinforced Concrete Pipe (RCP) and a 24-inch Polyvinyl Chloride (PVC) sewer main in Appian Way. The wet well at MAPS has a designed operating level of 6 ft with a working volume of 32,500 gallons. The MAPS has four 150-horsepower (HP), VFD driven, Flygt pumps installed in a dry pit with space for a fifth pump. Each pump is designed to pump 6,000 gpm at 68 ft of total dynamic head. The pumps currently operate in a 2 duty + 2 standby configuration. Three of the pumps are model C3356/715 with submersible motors internally modified for cooling from an external water source. The fourth pump is a Flygt NT 3356, which was recently installed in August 2023. The NT 3356 uses an internal closed loop cooling system that does not require an external water source. The City is awaiting the arrival of two additional NT 3356 pumps, which would replace two of the model C3356/715 pumps. The City anticipates the pumps will be installed by the end of 2023. Once installed, the MAPS will have a total of three NT 3356 pumps and one C3356/715 pump, with a vacant space for a fifth pump. One spare C3356/715 pump will also be stored at an offsite location. In 2023, the MAPS experienced two significant failures. In March, the MAPS experienced an overflow event due to a series of VFD faults and then instrumentation and control (I&C) and SCADA communications failure. In May, water intrusion into the electrical room caused the main switchboard to cease functioning and the emergency generator to power the pumps, nearly causing a 2nd overflow event. A condition assessment was performed in response to these events. The assessment looked at the mechanical, electrical, I&C, and structural condition of the facility. Findings and recommendations from the assessment were documented in a technical memorandum (Attachment A). A separate overflow assessment technical memorandum was produced to identify existing bypass and overflow locations as well as potential solutions to help mitigate future overflows (Attachment B). The scope of this RFP includes engineering design and construction oversight services to implement recommendations identified in these technical memoranda. SMURRF The Santa Monica Urban Runoff Recycling Facility (SMURRF) is a 0.5 MGD water recycling plant located adjacent to MAPS. SMURRF was constructed in 2002 as a stormwater best management practice (BMP) to treat dry weather urban runoff for pollutants such as sediment, oil, grease, and pathogens. Historically, treated water from SMURRF was pumped to the recycled water distribution system (purple pipe), where it was utilized for beneficial non-potable reuse (e.g. irrigation, toilet flushing, etc.) by approximately 30 recycled water customers. Initial construction of SMURRF included the following treatment processes: Coarse and fine screening to remove trash and debris Degritting systems to remove sand and grit Dissolved Air Flotation (DAF) to remove oil and grease Microfiltration (MF) / Ultrafiltration (UF) to reduce turbidity Ultraviolet (UV) and chlorine disinfection for pathogens While SMURRF has capacity to produce up to 0.5 MGD of treated water, the facility historically only produced 14% - 24% of this mark due to the City's successful conservation and urban runoff enforcement efforts. As a result, in 2023 reverse osmosis (RO) was added to the treatment train to treat an additional supplemental supply source, brackish groundwater, supplied from the Clean Beach Initiative (CBI) stormwater harvesting tank located in the Santa Monica Pier parking lot. The CBI captures dry- and wet-weather runoff from the Santa Monica Pier watershed and stores it prior to diverting it to SMURRF for treatment. During dry weather or when urban runoff supply is limited, underdrains beneath the CBI provide brackish groundwater as a supplemental supply source to SMURRF. With the new brackish supply and the addition of RO, SMURRF is able to treat up to its full capacity year-round. The additional RO treatment also allows SMURRF treated water to be blended with full advanced treated recycled wastewater from the City's Sustainable Water Infrastructure Project Advanced Water Treatment Facility (SWIP AWTF) and used as a diluent water source for groundwater recharge (i.e., indirect potable reuse). Due to the addition of brackish groundwater as a supply, a physical assessment of the existing equipment at SMURRF was performed in 2019 and 2020 to determine what repairs and/or improvements are needed (Attachment C). The assessment included a physical investigation of the above ground structural, mechanical, electrical, and I&C components of the treatment processes and facilities within the SMURRF. Electrical and process support (i.e. SCADA) for SMURRF, which reside at MAPS, were also assessed. Two improvements were strongly recommended and have been completed since the assessment: recoating the influent storage tank and water channel and repairing the drum screen supports. Since the assessment, City staff has also identified additional improvements that need to be made including upgrades to the grit chamber air system, DAF air system and electrical panel, UF system, and UV system. Question Submission Deadline:January 19, 2024, 3:00pm