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Post Information Posted At: Tue, Feb 21, 2023 10:00 AM Sealed Bid Process: Yes (Bids Sealed / Pricing Sealed) Private Bid: No 1. Introduction 1. Summary The City is seeking a qualified Hydrogeologist or Groundwater Geologist to provide on-call technical consulting services for general hydrogeological support, groundwater management, and the construction and rehabilitation of groundwater production and injection wells. 2. Background The City of Santa Monica (City) Water Resources Division provides potable and non-potable water to over 93,000 residents and 2,700 commercial customers through a combination of local groundwater, imported water from Metropolitan Water District, and recycled water. Local groundwater is the primary source of water supply in the City, making up approximately 65-70 percent of the total supply. The City has established a goal of becoming water self-sufficient on local water resources; having a reliable and sustainable groundwater supply is a critical component to achieve and maintain this goal. The City’s Water Resources Division is currently implementing several major capital projects to meet the City’s goal of achieving water self-sufficiency by 2023. The projects are described in the City’s Updated 2018 Sustainable Water Master Plan (SWMP) and 2020 Urban Water Management Plan (UWMP), which can be found at https://www.santamonica.gov/UWMP. The SWMP includes the following key components to achieve water self-sufficiency: Component 1 – Continuing and increasing water conservation efforts to permanently reduce water demand Component 2 – Developing sustainable and drought resilient alternative water supplies Component 3 – Expanding local groundwater production within sustainable yield limits The successful candidate for this on-call hydrogeological services RFP will support Components 2 and 3 of the SWMP – replenishing local groundwater supplies and expanding local groundwater production within sustainable yield limits. Groundwater Basin The City produces groundwater from the Santa Monica Basin (SMB). The City Water Resources Division is currently the sole municipal-supply producer of groundwater from the SMB, which covers approximately 50 square miles, and underlies and extends beyond the entire 8.3 square mile boundary of the city of Santa Monica. The City’s local groundwater supply is drawn from three sub-basins within the SMB: the Arcadia Subbasin, Charnock Subbasin and Olympic Subbasin (Figure 1). The Santa Monica Basin Groundwater Sustainability Agency (SMBGSA) was formed in 2017 in accordance with the California Sustainable Groundwater Management Act (SGMA) of 2014. The five member agencies of the SMBGSA include the City of Santa Monica, the City of Beverly Hills, the City of Los Angeles by and through its Department of Water and Power, the City of Culver City, and the County of Los Angeles. The SMBGSA completed and submitted a Draft Groundwater Sustainability Plan (GSP) to the California Department of Water Resources (DWR) in January 2022. Efforts relating to the GSP can be found at https://santamonica.gov/gsp. Groundwater Wells The City currently has ten (10) wells in production: five (5) wells in the Charnock Well Field, three (3) wells in the Arcadia Well Field and two (2) wells in the Olympic Well Field. One well (SM-1) feeds directly into the distribution system, while the other nine wells are conveyed to the Arcadia Water Treatment Plant (WTP). The combined water from each well field undergoes a series of treatments at the Arcadia WTP, including green sand filtration, reverse osmosis, and aeration. A table listing the City’s current groundwater wells is provided in Table 1. Arcadia Well Field Santa Monica Well 1 (SM-1) is a low production well with a maximum capacity of 250 gpm. This well is equipped with a vertical turbine pump. The well’s surface construction is contained in a below ground concrete vault. Water from the well feeds directly into the 350-foot zone at a remote location in the distribution system. Arcadia Wells 4 and 5 (ARC-4 and ARC-5) are also low production wells and are located at the Arcadia WTP. Each well produces a maximum of 250 gpm. The Arcadia Wells were taken out of service at the same time the Charnock Well Field was shut down in 1996 due to methyl tertiary-butyl ether (MTBE) contamination. On May 15, 2002, the City received a permit amendment granting permission to install and operate a granular activated carbon (GAC) treatment to remove MTBE and potential TBA from water produced by Arcadia Well 4 and Arcadia Well 5. The GAC treatment system was the main component of the City’s Production Aquifer Remediation System (PARS) project. The PARS treatment plant was placed on standby in April 2004 because of reduced concentration of MTBE in Arcadia Wells 4 and 5 to non-detect for over two years. In 2010, PARS was completely decommissioned when the City started its Charnock Wellfield Restoration Project. Along with the restoration of the Charnock Wellfield, the City made major changes in treatment and operations at the Arcadia Treatment Facility. Due to aquifer drawdown levels and pump interference, the Arcadia Wells are currently operated on a duty/standby basis. The City operates only one of the two Arcadia wells at a time. Charnock Well Field The Charnock Well Field is the City’s largest water producing well field and has been used as a drinking water source since 1924. The Charnock Well Field consists of five production wells: Charnock 13, 16, 18, 19, and 20. The Charnock wells were shut down in 1996 after detection of high levels of MTBE in the groundwater. The MTBE contamination was a result of leaking underground gasoline storage tanks and pipelines owned by several oil companies. The loss of the Charnock Wells caused the City to increase the amount of imported water purchased from MWD to approximately 85 percent of its water demand. The City and oil companies identified as responsible parties reached settlement agreement to construct and operate a treatment facility, the Charnock Treatment Facility, to restore the Charnock Wellfield. Following the completion of the Charnock Treatment Facility, the Charnock Wells were restored and began production again in December 2010. Effluent from the Charnock Treatment Facility is conveyed to the Arcadia WTP for additional treatment. Olympic Well Field The Olympic Well Field currently consists of two production wells: Santa Monica Well 3 (SM-3) and Santa Monica Well 4 (SM-4). The Olympic Well Field is the City’s second largest groundwater producer and is in an area previously occupied by several industries. Releases from industrial operations resulted in the presence of VOCs in the groundwater produced by these wells including trichloroethylene (TCE), tetrachloroethylene (PCE), carbon tetrachloride (CTC), 1,2,3-trichloropropane (1,2,3-TCP) and 1,4-dioxane. The City is currently in the design phase of a new 3.0 MGD Olympic Advanced Water Treatment Facility (AWTF) that will be co-located at the Arcadia WTP. The Olympic AWTF is anticipated to be in operation in 2023. Upon completion, the new Olympic AWTF will allow for increased groundwater production from the Olympic Well Field. The increased production will come from existing well SM-4, a new well (SM-8, constructed in 2018), and a replacement well for SM-3 (SM-9, constructed in 2020). The estimated pumping rates for SM-8 and SM-9 are 600 gpm and 900 gpm, respectively. Groundwater Recharge via Direct Injection The City is in the construction phase of a recycled water project known as the Sustainable Water Infrastructure Project (SWIP). The SWIP will produce full advanced treated wastewater, a portion of which the City plans to use for indirect potable reuse via direct injection into the Olympic Sub-basin. In 2020, the City completed construction of one injection well, SM-10i, with an estimated injection capacity of 200 GPM. It is likely at least one or two additional injection well will be constructed. The SWIP is expected to begin groundwater recharge operations in 2023. 3. Contact Information The City has designated Chris Aguillon, as its contact (the “City Contact”) for this request for proposals (this “RFP”). The City Contact’s information is listed below: Any inquiries or requests regarding this procurement should be submitted via ProcureNow. Other City officers, agents, employees or representatives do not have authority to respond on behalf of the City. Contact with unauthorized City personnel during the selection process may result in disqualification. Chris Aguillon CIP Project Manager 2500 Michigan Avenue Building 1 Santa Monica, CA 90404 Email: [email protected] Phone: (310) 458-8235 Department: Water Resources Department Head: . . 4. Timeline Proposal Calendar The following is a list of key dates: Release Project Date: February 21, 2023 Pre-Proposal Meeting (Mandatory): February 28, 2023, 10:00am Job Walk will meet at Gandara Park parking lot (1819 Stewart St, Santa Monica, CA 90404) Question Submission Deadline: March 7, 2023, 3:00pm Question Response Deadline: March 21, 2023, 5:00pm Proposal Submission Deadline: April 4, 2023, 5:00pm

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