4/24/2012 SEWER COMMISSION Minutes

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E. A Needs Assessment Report will be produced, in accordance with DEP's Guide to Comprehensive Wastewater Management Planning and the Ad Hoc Task Force documents for Decentralized Wastewater Management, to allow the Needs Assessment Report to be used for the MEPA review and to facilitate any future State Revolving Fund (SRF) low interest loans with ten (10) copies of the report and four (4) copies of any oversize plans submitted to the COMMISSION. The Needs Assessment Report will provide a complete summary of regulatory issues for wastewater and nitrogen management to act as a framework for the MEPA process. The report will identify and discuss of all relevant reports, studies, and environmental investigations reviewed in Phase I. This summary will develop a solid basis for the Nitrogen Management Plan. The performance, capacity, and expandability will be presented for all the existing and proposed package wastewater treatment plants and collection systems in Mashpee. This presentation and summary will allow accurate development of alternative scenarios in Phases III, IV, V, VI,and VII. A meeting will be organized and coordinated with DEP,CCC, SMAST, CZM, and DMF during this phase. After COMMISSION approval of the Final Needs Assessment Report, ENGINEER will print and distribute up to 45 copies of the report to meet the needs of the MEPA and CCC regulatory process and provide the COMMISSION with electronic copies of the report. The Town will be responsible for additional copies beyond the 45 stated here. Phase III Screening of Alternative Technologies and Techniques. A. Identify, review and perform a cost-benefit analysis of all potentially feasible technologies for nitrogen removal from wastewater in the subject watersheds. Technologies to be reviewed will include at a minimum, conventional gravity sewer system of various sizes (i.e. serving various sizes of areas and total flows), variable grade sewers, STEP sewer system of various sizes, vacuum sewer systems, on-site denitrifying systems (all types approved by DEP as well as any others suggested by the ENGINEER), with and without municipal management, and neighborhood cluster systems (gravity or STEP or combination) served by small municipal facilities using various appropriate denitrifying technologies. The available alternative technologies for large publicly owned treatment works shall also be addressed, The ENGINEER's previous study of Popponesset Watershed sewering, funded by Barnstable County, will be used as an input to this analysis. ENGINEER shall review and screen at least the following technologies for individual on-site and cluster systems: • Bioclere • Ruck System • FAST System • Amphidrome • Orenco System including septic tank filters • Sand, Rock, or Mixed Media Recirculation Filters • Waterloo Biofilter • Glendon Upflow Filter • Peat Moss System • Constructed Wetlands • Any other wastewater treatment systems which have been installed and tested at the Massachusetts Alternative Septic System Test Center ENGINEER shall review and screen at least the following-technologies-for advanced nitrogen removal technologies for large-scale treatment include: • Anoxic Rotating Biological Contactors(RBC) • Sequencing Batch Reactors (SBR) • Modified Ludzack—Ettinger(MLE) • Amphidrome • Aerated Biological Filters 3