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3. PFAS Treatment Siting Evaluation workshop agenda and minutes. Task 2.0 - Assumptions 1. Meetings and workshops will be conducted virtually during the course of the Project under this task. 2. The City will determine if the pipeline is required to be installed from Well 8 back to Well 5/6 to maintain adequate pressure/flow near Well 5/6. The City will also provide the required pressure and discharge locations. 3. The City will determine if the PFAS treatment equipment is required to be located within a building at Well 5/6 or Well 8. 4. The City will provide the property line setbacks and building height restrictions for constructing the treatment facility at Wells 5/6 and/or Well 8. 5. The City will confirm the extent of Well 5/6 site ownership by the City, and confirm if any existing easements on school district property will allow for locating PFAS treatment equipment. 6. The City will confirm limits of City property across the street from Well 5/6 that can permanently be dedicated to PFAS treatment. City will also confirm the amount of property that is available at the City's Operations Services Center that can be dedicated to PFAS treatment. 7. The City will provide GIS files and/or as -built drawings of utilities for the pipeline alignments under investigation as part of Task 2.2. 8. Topographic surveying, geotechnical investigations, California Environmental Quality Act (CEQA) studies, and detailed utility investigations (i.e. potholing) are not included in this scope of work. These investigations will be performed under a future contract. Task 3.0 - Wells 5, 6 and 8 Improvements The selected location of the PFAS Treatment Facility will impact the recommendations for improvements at Wells 5, 6 and 8. For example, if the PFAS Treatment Facility is centralized at Well 8, the chemical rooms at Well 5/6 could be repurposed for the electrical equipment, or potentially other uses. The Well 5, 6, and 8 improvements analysis will be performed after completion of Task 2.0 — PFAS Treatment Siting Evaluation. Task 3.1— Well Analysis at Wells 5, 6, and 8 Well 5 — In the first half of 2020, the CONSULTANT assisted the City in analysis of the Well 5 pump failure. Part of the analysis included review of video inspection of the casing and hydraulic performance of the pump. The CONSULTANT determined that minor repairs and cleaning to the casing was recommended as part of this Project. For the pump, although it appears to be meeting current demands, the pump is underperforming (producing less flow than the factory pump curve would suggest). The City plans to perform additional testing to validate the pumping capacity once the well is put back in service. The CONSULTANT shall review updated test information, in combination with their hydraulic analysis for new PFAS treatment, to determine recommendations for pump rehabilitation/replacement. Well 6 — The Water Quality evaluation identified that the pump is greater than 20 years old and beyond its pw://Ca rol lo/Documents/Clten t/CA/Pleasanton/_ProposaIs/We ll S, 6 and 8 PFAS Treatment and Well Improvements BODR/Exhibit A_Well S, 6 and 8 PFAS Treatment and Rehabilitation Scope.dou PAGE 6of10