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reduce surcharging and eliminate the SSOs, determine the most cost effective alternative and justify it in a <br /> report to USEPA. <br /> DETAILED PROJECT TASKS <br /> 1. Team Coordination and Discovery <br /> A. Preliminary flow and rainfall monitoring plans prepared for the investigation areas(TA 3N&TA <br /> 6)identified 19 flow monitoring locations and 4 rainfall monitoring locations. Provide input to <br /> ADS Environmental to assist with selecting monitoring sites that will facilitate collection of <br /> reliable data for use in calibrating and validating the sanitary sewer collection system models. <br /> B. Gather and prepare a historical perspective of the investigation area sewer systems so there is an <br /> understanding of the history of development,type of development, construction techniques and <br /> pipe materials used. <br /> C. Prepare a summary of the previous investigations,repairs,rehabilitation and replacement work <br /> performed on the sanitary sewer system in the investigation areas so there is an understanding of <br /> the work already completed and what may be remaining. <br /> D. Develop a public engagement approach and plan to distribute notices, letters, questionnaires and <br /> educational information, attract residents and local officials to meetings and obtain input about <br /> system response to wet weather. This includes assisting the city with drafting an opening letter to <br /> the residents describing the program and the team hired to develop solutions. <br /> E. Schedule, coordinate and prepare for an initial meeting with the public. Post and distribute <br /> resident questionnaire and compile results. Separate meetings will be held in each investigation <br /> area. <br /> F. For other TAs 1, 2, 3S, 4, 5, 7 and 8,provide input to ADS Environmental to assist with selecting <br /> monitoring sites that will facilitate collection of reliable flow and rainfall data for use in <br /> calibrating and validating future sanitary sewer collection system models(models outside the <br /> scope of these services) of these TAs. 67 flow monitoring locations and 11 rain gauge sites are <br /> identified. <br /> 2. Field Investigation <br /> A. Review existing CCTV reports(-297)provided by the City. Summarize results, identifying any <br /> potential early action projects, such as pipes with root blockages or pipe collapses. Calculate risk <br /> score. <br /> B. Schedule,coordinate and identify houses in the investigation basins with basements and crawl <br /> spaces using city address list. For those houses with basements or crawl spaces, obtain finished <br /> floor elevations(FFE) for use in determining houses subject to backup. <br /> C. Schedule, coordinate and digitally scan all sanitary manholes (quantity=261)to assess <br /> condition, identify defects and potential UI contribution. <br /> D. Schedule, coordinate and perform smoke testing of all sanitary sewer(-12.5 miles) located in the <br /> investigation basins to identify public and private sewer defects and document the findings in a <br /> report(include photographs and GPS coordinates of defects). Smoke testing protocols approved <br /> by the City shall be utilized. <br /> E. Schedule, coordinate and perform dye water flooding of five areas where storm water has the <br /> potential to pond over or near sanitary sewers and manholes to identify system defects and <br /> document the findings in a report. <br /> F. Inspect private basement plumbing systems of willing residents within the investigation basins to <br /> identify illegal connections.Findings shall be summarized and submitted to the City. Inspection <br /> protocols and forms approved by the City shall be utilized in the inspections. <br /> Last Revised:04/29/2015 <br />