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projects that mitigates infiltration and inflow (I/I) in the sewer system. The program is currently completing in its eighth phase, which included lining the main trunkline in Flowmetering Basin (FM) 19 and FM 7, which follow Cazenovia Creek to the interconnection with the Buffalo Sewer Authority. This program has significantly reduced overflows since its inception. As part of the program, GHD prepared an engineering model report for the Town in October 2024 (Sanitary Sewer Evaluation Survey Re-evaluation), which evaluated potential ways to mitigate overflows and close out the Order. Potential projects included sanitary sewer lining, additional sewer lining, and upsized sewers. This report was submitted to the NYSDEC and initiated negotiations to modify the Order so that project funding could be optimized. New projects included in this plan were described in the Town Engineer’s presentation “Town of West Seneca Phase 8.5 Sanitary Sewer Improvements Informational Meeting, June 23, 2025.” The Town’s water system is currently fed by the Erie County Water Authority (ECWA), where the trunk lines are owned and operated by ECWA and some smaller diameter (8-12-inch) mains are owned and operated by the Town. No major projects are anticipated with the water system. However, growth demands within the Town may require capacity assessments and addressing pressure issues. Many water mains are also nearing the end of their expected service life and will eventually require rehabilitation or replacement. GHD has extensive experience with small- and large-scale system wide sanitary sewer investigation and rehabilitation projects, as well as waterline replacement and improvement projects and will leverage our experience to recommend approaches that are tailored to the Town’s unique circumstances. 2.1.2 Asset Condition Verification To ensure the full extent of project needs are captured in the scope of the design, GHD team members can visit the project site to verify asset conditions to help prevent scope creep or change orders during construction. Our typical approach to performing condition assessments is as follows: – GHD will review existing condition assessment information and supplement it with our field observations. We will collect additional field data as required to provide necessary input to develop the concept, final design, and bid documents. – GHD will undertake a systematic assessment of the asset, conducting both visual inspections and other testing as necessary. – GHD will review other projects elements (structural, mechanical, electrical, and instrumentation and controls) as necessary to confirm as-built conditions and capacity, as well as to assess condition and operability. – GHD will review the latest code requirements as they apply to the asset/facilities and identify any features not compliant. – GHD will field verify existing as-built drawings vs. field conditions and red-line any field changes made, such as decommissioned or replaced equipment, piping modifications, or field modifications. – GHD will develop a list of existing assets that cannot be accessed during the design phase for field verification (e.g., buried, encased, or insulated piping, ductbanks and raceways, and tank and channel conditions below the water line). We will incorporate bid items and expected quantities for anticipated potential repairs into the bid documents to cover anticipated or potential, but undefinable, work in these areas. 2.1.3 Studies, Evaluation and Preliminary Design GHD will evaluate alternatives for achieving the goals of each project and provide a conceptual plan or report consisting of the established footprint of the proposed project and mapping out the relationship between new and existing facilities or site areas. We will conduct field investigations to confirm as-built conditions of facilities, review identified O&M issues and concerns and assess the feasibility of the preliminary layouts. Site topography, accessibility, and site proximity to existing utilities will also be reviewed in the field with respect to available as-builts and GIS data. GHD | Town of West Seneca | 12681649 | Engineering Services for Water and Wastewater Projects 3 Page 126 of 301