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Groundwater Contamination Education Materials* Municipal Urban Stormwater Treatment Facility (LB MUST) I City of Long Beach I Long Beach, California I Process Engineer Water traveling through the City storm drain system contains a series of pollutants, including bacteria, hydrocarbons, metals, and trash that are currently discharged to the Los Angeles River without treatment, By intercepting, diverting, and treating the dry weather urban runoff and the first Flush of rainwater runoff, the new LB MUST facility will reduce pollution that would otherwise discharge into the River. The recycled water from the LB MUST Facility will help create and sustain riparian wetland habitat and replace potable water for the irrigation of parks. Tori helped operate a pilot study that demonstrated the ability of the treatment train including ceramic ultrafiltration, iron removal filtration, and advanced oxidation to meet water quality goals and provided important insights about removal of metals and solids. Evaluation of the Distribution System Implications of Source Water Change I Coachella Valley Water District I Coachella, California Process Engineer The District is connecting two currently separate service areas of their distribution system. This will provide new sources of water to an existing service area and replace several aging wells, The District engaged Stantec to evaluate potential issues with corrosivity during the water supply transition. Tori supported a study to use Stantec-developed water quality tools and conceptual frameworks to evaluate a wide array of potential indicators of corrosion, Tori analyzed water quality data; calculated corrosion indices for the current and the proposed water sources; and identified potential adverse impacts to the system and strategies for mitigating them. Tori and the Stantec team considered practical constraints of chemical conditioning and source water blending as corrosion mitigation strategies and held workshops with the District to identify the best strategies to reduce corrosion risk while minimizing changes to their existing treatment and distribution systems. Industrial Groundwater Treatment Feasibility Analysis Confidential Client I Missouri I Process Engineer A confidential industrial client is expanding its system for treatment of contaminated groundwater from two underlying aquifer units. The shallow aquifer has elevated concentrations of volatile organic compounds (VOCs), metals, and 1,4-dioxane; the deep aquifer has elevated levels of VOCs. Currently, groundwater from both aquifer units is treated using air strippers with effluent discharged to the sanitary sewer (shallow aquifer) and reinjected (deep aquifer). Tori and the Stantec team are developing guidance for expansion of the existing treatment facilities to increase the flow capacity to bring additional wells online, and to add ion exchange, adsorption using granular activated carbon, and ultraviolet oxidation processes to treat for metals and 1,4-dioxane in the shallow aquifer. Mt. Crosby Filter Upgrade I Segwater Brisbane, Australia I Design Engineer Seqwater is rehabilitating filters at their 60 MGD Mt. Crosby Water Treatment Plant that serves the greater Brisbane area, and Stantec is serving as Owner's Engineer. The filter rehabilitation involves the installation of a new filter underdrain designed to distribute flow across the length of the lateral, for which the client has requested extensive vendor testing. Tori has reviewed vendor test methods and data, performed hydraulic analyses to assess test results, and reviewed media specifications to support Segwater. Public Water Systems, Confidential Client* I Arizona Design Engineer Tori assisted in the design of two well water systems for a confidential client in Arizona. Both systems were rehabilitated and consist of the following components: submersible well pump, dry chlorination system, potable water day tank, and package booster pump station with hydropneumatic tank. Tori was responsible for developing the hydraulics to select appropriate submersible well pump and package booster pump models for each system. She drafted construction drawings for both projects and worked with the project engineer to develop site layout options and communicate with the client to refine the layout. Tori also assisted in the development of technical specifications and design report for each of the systems and supported coordination with regulatory agencies to acquire permits for the systems. Regional Coordination of the Safe Clean Water Program (SCWP) I LA County Flood Control District Los Angeles County, California Regional Coordinator The District contracted Stantec to serve as regional coordinator of the SCWP which distributes about $300 million across Los Angeles County to be managed by cities, the county, and nine watershed area steering committees in efforts to augment water supply, mitigate water quality degradation, and provide community benefits. Our approach to supporting the regional coordination of the SCWP focuses on developing systems and templates to ease the work of watershed area steering committee, watershed coordinators, and Los Angeles County staff responsible for program coordination. This includes establishing training modules for steering committee members and watershed coordinators, instituting routine watershed coordinators meetings with information sharing and peer -training agendas, and producing template outreach tools for the watershed coordinators to use. Tori is also supporting watershed area steering committees and Los Angeles County by staffing steering committee meetings. * denotes projects completed with other firms City of Santa Ana', On -Call Engineering Design Services for PFAS Treatment Systems RFP NO.22-133 A-34