Common use of Specific Project Elements Clause in Contracts

Specific Project Elements. Collection and Conveyance System o Stormwater will be diverted from the existing local storm drain system and directed to the park. Diversions will be constructed along storm drains to capture water quality flows and they will be conveyed to the park in new storm drainpipes. • Pre-Treatment Unit (Hydrodynamic Separator) o Diverted stormwater will flow through a pre-treatment unit, likely a hydrodynamic separator, prior to entering the underground storage vault. The purpose of this pretreatment is to remove debris and sediment to limit maintenance in the vault. • Underground Storage Vault for Water Quality Treatment (infiltration) o Stormwater will be collected in an underground storage vault where it will be held while it infiltrates into the soil. The vaults will be sized to capture runoff from the 85th percentile storm. • Harvest and Use (passive turf irrigation) o A passive irrigation system consisting of shallow storage below the turf will be provided to irrigate the field using captured stormwater. This approach allows for use of stormwater for irrigation, which displaces the use of potable water. • Multi-lingual interpretative signage / displays o This project will be located underground once complete. Signage and displays will be incorporated into the park to help residents learn about the system and what they can do to improve the quality of urban runoff in their area. Signage associated with the SEP shall state in a prominent manner that the project is being undertaken as part of settlement of a Regional Water Board enforcement action. Some project elements will require long-term maintenance, which the City will perform after completion of the SEP on a regular schedule. These activities are described here for informational purposes and are not considered part of the SEP’s Scope of Work. • Collection and Conveyance System o The collection and conveyance systems will require maintenance similar to what the City currently provides for catch basins and storm drains. Maintenance will focus on debris and sediment removal to ensure design capacity and function remain intact. • Pre-Treatment Unit (Hydrodynamic Separator) o The pre-treatment unit will require clean out by vacuum truck prior to each wet season. Additional maintenance may be required depending on the amount of runoff generated each year. The unit is accessible via manhole at the ground surface. • Underground Storage Vault for Water Quality Treatment (infiltration) o The underground storage vault will have a settling forebay to concentrate any debris or sediment that is not addressed by the pre-treatment unit. The settling forebay will be accessible via manhole and will require annual clean out. • Harvest and Use (passive turf irrigation) o This passive turf irrigation system will not require ongoing maintenance. Prior to entering the passive turf irrigation system, the water will have already passed through the pre-treatment unit and the settling forebay in the underground vault. • Pollution Prevention • Pollution Reduction The Calas Park SEP will capture and pretreat stormwater runoff, improve onsite water retention and enhancement of groundwater supplies for beneficial use, and substantially reduce remaining stormwater runoff and associated pollutants conveyed to surface waters. This, in turn, will improve public health, and will operate to reduce and/or prevent pollution.‌‌‌ This project will reduce the mobilization of stormwater-associated pollutants (such as zinc and bacteria) from the drainage area, will provide a mechanism by which the stormwater can be made available for beneficial use in the underlying groundwater, and will reduce the surface water risk posed by these constituents to the surrounding communities. In addition, the construction of this project, and the desired stormwater education signage to be included, will promote public awareness and education regarding urban runoff and the need to prevent pollution and protect water quality. Signage associated with the SEP shall state in a prominent manner that the project is being undertaken as part of settlement of a Regional Water Board enforcement action. The project is expected to capture and pretreat up to 2.8 acre-feet of stormwater produced by the drainage area during the water quality rain event and infiltrate that water locally, enhancing the groundwater basin supply that, in turn, can support designated beneficial uses, like municipal and domestic supply (MUN). Pollutant loads will be reduced in surface waters, human health will be further protected, and groundwater supplies will be enhanced for beneficial use. The Calas Park SEP is located in the same watershed (▇▇▇▇▇▇▇▇▇ Channel) and a short distance (approximately 2 miles) from the location of the violations; therefore, the primary benefits of the SEP will be within the immediate geographic area where the violations occurred. The Calas Park SEP will reduce the potential for several types of pollutants, including bacteria and metals, to reach the ▇▇▇▇▇▇▇▇▇ Channel. The Calas Park SEP is both geographically related to the violations (i.e., existing in the same watershed) and designed to reduce the overall risk to the public and the environment through reduction of pollutants. Yes. This project is within areas that have a Disadvantaged Community (DAC) score of CalEnviroScreen 4.0 Top 25%. The particular tract in which Calas Park is located scored in the 92nd percentile (see Attachment B). The Calas Park SEP will provide capture and pretreatment of stormwater runoff and facilitate infiltration to groundwater which will beneficially improve the overall health of the watershed and provide a clean source for drinking water in the community. While the project will be largely underground, the SEP’s public outreach and education on the importance of clean water projects and the City’s efforts to improve water quality through multilingual interpretive displays, exhibits, and interactive features, will promote watershed health and encouragevisitors to engage in water conservation, promote stewardship, and educate the public about local water management strategies. describe.‌ The State of California statutorily recognizes that every human being has the right to safe, clean, affordable, and accessible water adequate for human consumption, cooking, and sanitary purposes. Because the Calas Park SEP specifically intends to facilitate infiltration of stormwater to groundwater, the SEP indirectly supports the State Water Board’s core value of a human right to water. However, because the water supply benefits of the project will not be tracked, this factor is not directly applicable. As the CEQA lead agency for the project, it is anticipated that the City will be required to conduct environmental review of the proposed project, including preparation of a CEQA document with supporting technical studies, as well as acquisition of regulatory permits. CEQA and any applicable regulatory permits will be initiated once a conceptual design plan is available during the project period of performance (i.e., advanced design is not typically necessary to initiate CEQA). After review of the project concept plan and the associated footprint of construction activities, the appropriate level of CEQA compliance and the applicable regulatory permits will be determined. Based on the current planning for the project, we anticipate an Initial Study/Mitigated Negative Declaration (IS/MND) will be the appropriate level of CEQA documentation to support the project. Due to the proposed excavation activities and proximity to sensitive receptors (i.e., residential uses), technical studies analyzing the construction-related impacts will be prepared, which are anticipated to include an Air Quality Report, Cultural Resources Report, Greenhouse Gas Emissions, and Noise and Vibration. If any biological or jurisdictional resources have the potential to be impacted during implementation of the proposed project, the appropriate regulatory permits would be initiated and prepared, typically commencing prior to the release of the Draft IS/MND document and requiring 6-12 months, dependent on agency reviews. Preparation and approval of an IS/MND document and regulatory permits is anticipated to take up to 16 months. Once the project is approved by the City Council, the approved IS/MND would be provided to the Regional Water Quality Control Board, Los Angeles Region (Regional Water Board) prior to commencement of construction of the project. Any applicable regulatory permitting will be completed as the design progresses to ensure compliance with CEQA and all regulatory requirements. Because the project will be located at a City-owned park, no landowner agreements will be necessary. The work for the Calas Park SEP will include planning and design, environmental documentation and permitting, bidding, constructing, and commissioning a stormwater capture facility. As shown in the schedule below, project implementation will occur over a 48-month period beginning with the effective date of the final stipulated order. The Project features and amenities are described below, with specific project elements and milestones detailed in the project budget in the section below, including CEQA, project design, permitting, bidding, award, and construction. The 48-month project timeframe is necessary to complete design, environmental review, permitting, construction, and commissioning of an infrastructure project of this scope. Moreover, the extended timeframe is justified given the exceptional localized environmental benefits expected from the project. Stormwater runoff can mobilize pollutants (such as bacteria and metals) to nearby receiving waterbodies (▇▇▇▇▇▇▇▇▇ Channel) and ultimately, the Pacific Ocean, thereby precluding attainment of recreational and other beneficial uses. The capture, pretreatment and infiltration of stormwater via the SEP will provide significant water quality benefits to the local watershed, and the DAC in which the watershed is located. The ability to address urban runoff from the 63-acre drainage area with one project is a rare and important opportunity. Completion of the project will provide significant benefits to the City and surrounding community and will facilitate more expedient progress to address water quality challenges in this area than would otherwise be possible. The 48-month proposed project timeframe is also necessary to minimize disruption to the local community, which relies heavily on the area for access to green space and places to remain active. Construction will be staged and scheduled to minimize impacts on sports and other activities that occur in the park. The park primarily serves an Environmental Justice community burdened by the impacts of a highly industrialized area (e.g., multiple oil refineries and a major freeway within approximately one mile of the park). The community is characterized by high CalEnviroScreen 4.0 scores, specifically a score of 93 for “Impaired Waters” and 96 for “Pollution Burden.” Thus, the investment this project will make in the community will provide “exceptional environmental benefits” that warrant approval of a 48-month project timeline. Upon award of the funds, the City will undertake a Preliminary Engineering Study to progress the project concept to a 10% plan. The 10% design phase will include the geotechnical investigation necessary to confirm infiltration feasibility. With the concept proved feasible, the City will move to produce a Plans, Specifications, and Estimates package. Key deliverables will include project design and 30%, 90%, and 100% plans. Deliverables include quarterly progress reports (12 total), Preliminary Engineering Study, Design Plans (3 total, 1 for each deliverable), and a final completion report. The final completion report will conform to SEP Reporting and Certificate of Completion guidelines. Discussion of the environmental documentation and permitting is included in the section above. The project will schedule and stage construction to avoid impacts to frequently used park features such as playground equipment, event pavilions, and parking access. The soccer and baseball/softball fields will be impacted during construction. The work, however, will be scheduled around sports seasons to limit disturbance to community activities as much as possible. Project Tasks and Schedule‌ • Milestone deadline: 20 months from the effective date of the Stipulated Order. • Milestone deadline: 26 months from the effective date of the Stipulated Order. • Milestone deadline: 32 months from the effective date of the Stipulated Order.