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MASHPEE SEWER COMMISSION SEPTEMBER 18, 2007 MASHPEE TOWN HALL Members Present: Tom Fudala, Don Desmaris Stearns and Wheler/Jeff Gregg Presentation by Stearns and Wheler about where they are in the process, the next steps. S&W has submitted the final needs assessment to the town. They are in the process of commenting on the technology screening report They are also in the process of developing scenarios for discussion. Those are not finalized. Are developing a notice of project change for the MEPA process. Goals of the scenarios: Identify areas to be sewered in the most feasible and cost effective way, in order to meet the TMDLs. Second step will be a more detailed evaluation of 2-3 of the scenarios. As part f the process, will be looking at preliminary sites, large pieces of land either town owned or possible to acquire for wastewater treatment and disposal. Falmouth is going through a similar process. Through previous meetings and discussion, identified 5 different scenarios for review. 1. Existing facilities: pick up nearby properties that were assumed in the plants original design, but assume operating at 10 parts per million nitrogen. NO technological improvements. Advantages: assume the facilities will remain private so town has minimal operations responsibility. Disadvantages: no improved performance, recharge is still within the watershed,facilities must meet performance to meet TMDLs which is more difficult without town involvement. 2. Expanding existing facilities and improve their performance Advantages: infrastructure already there (cost savings) Disadvantages: town must manage multiple facilities; requires participation from owners of facilities; higher cost to improve existing facilities—to retrofit; discharge still within watershed. Tom said some facilities are more amenable to expansion than others. Jeff Gregg agrees. For example, New Seabury has a lot of capacity, other plants have limited capacity. Have to consider length of sewer line etc. Tom asked what they envision for input from the Sewer Commission and others? Jeff said S&W will pare it down a little first,then run the scenarios by the Sewer Commission. Tom asked if S&W is actively involved with Barnstable's facilities planning project? They are. They are starting to look at the TMDLs for the 3 bays area. 3. Nitrex Technology by Lombardo Associates. Advantages: high nitrogen removal rates, decentralized approach. Disadvantages: Management and enforcement; limited data available on performance; unknown expansion capabilities; sole source—procurement issues. 1