WSP USA ENVIROMENT & INFRASTRUCTURE INC.

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Scope of Services and Schedule encompasses numerous aspects of TMDL implementation, including watershed planning, special studies, and coordination with stakeholders involved in third -party TMDL development. We have experience with a variety of TMDL approaches, including development of water effect ratios and load modeling for metals TMDL; source assessment studies; and land use runoff monitoring projects to support long-term modeling of pollutant loading. Under the last contract period, WSP developed recommendations on strategies for the City to implement for the Newport Bay TMDL program. With the work performed and expertise on the TMDL compliance issues, WSP provides extensive resources available to the City to meet the City's long- term goals of having more control over the programmatic direction of the TMDL programs. 6.3.7 Watershed Management Plans (WMP) Support Technical Knowledge The WSP team has extensive experience preparing and implementing Water Quality Improvement Plans (WQIP) or WMPs. WSP is currently assisting north Orange County cities with BMP data entry within the web -based BMP asset and modeling tool, OC Storm Water Tools. In fact, OC Storm Water Tools will be a key component of the WMP compliance strategy for Newport Bay. We have been involved since initial development of the South Orange County WQIP in 2015 and currently assist several south Orange County cities with providing comments on WQIP documents, completing WQIP jurisdictional strategy table updates, and updating OC Storm Water Tools. We have also helped the South Orange County Copermittees with TMDL Comprehensive Load Reduction Plans and provided comments on the draft Time Schedule Order. The WSP team also has prepared and implemented several WQIPs within the San Diego's watersheds. Reasonable Assurance Analysis Reasonable assurance analysis (RAA) provides the demonstration that the implementation of control measures will, in combination with operation of existing or proposed of control measures, in combination with operation or proposed storm drain system infrastructure and management programs, result in sufficient pollutant reductions over time to meet TMDL wasteload allocations, water quality based effluent limits, or other water quality targets specified in the MS4 permit. RAAs may also assist stakeholders or City with budgetary impacts to meet pollutant reductions. As stated above, OC Storm Water Tools is anticipated to be a key component of the WMP compliance strategy as a BMP inventory, planning, and water quality modeling tool. The web -based platform provides a uniform storm water asset management database linked to spatial drainage data and a pollution load reduction model to quantify water quality benefits. The tool is envisioned to encapsulate and eventually fulfill MS4 permit reporting requirements replacing past reporting methods. WSP has assisted several cities by updating information in the OC Storm Water Tools that will be used to demonstrate load reductions. WSP's team can assist with the preparation of RAA, assess pollutant reductions associated with new BMP projects, and/or review the RAA completed by the County. WMP Compliance WSP can support the City in many areas, such as: ► Preparing City comments on Orange County Storm Water Program -developed planning documents and materials ► Preparing City comments on RWQCB-issued orders ► Participating in WMP program planning and implementation on behalf of the City ► Managing implementation of the WMP, including City -specific jurisdictional strategies, such as an MS4 outfall dry weather flow reduction ► Participating in Newport Bay watershed TMDLs implementation efforts and compliance assessment City of Santa Ana I Industrial/Commercial Inspection and NPDES Program Support Services I page 130 RFP No. 23-028