6/21/2011 SEWER COMMISSION Minutes

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:w recommendations focus on targeting wastewater flows and loads in order to meet the TM Ls, however, each individual town will reale their own determination as to how to address the TMDLs, Mr.Fudala noted that the process to develop a memorandum of understanding with the three surrounding towns has begun, in an effort to address each town's share ofthe target. Mr. Gregg added that GHD would be estimating costs for the watersheds, rather than individual towns, and would focus on eating the flows and remotes as it would impact Mashpee and the planning process. Based on the unified database, the existing average.flows by town in gallons per day(gpd) are as follows: ponesset day Sand ich. 1951000 Barnstable 1207900 Mashpee 7401)000 East wauoit Bay Sandwich 1351000 Falmouth 65,Poo Mashpee 29530000 Outside Mashpee 190;(� 133301900 f Regarding the various approaches,Mr. Gregg indicated that there were two opti ns, which could be impacted by a regional approach and/or whether or not New Seabury would be involved. Option#1 would include the flows of pests of Banutable and Falmouth being treated and discharged within Mashpee. Existing treatment plaints,new treatment plants and expansion of existing treatment plants would have a goal of ultimately meeting 3 nig. per liter. willowbend and New Seabury,.or other facilities, would be expanded and new facilities such as 1 shumet Road, Site 41, the Back Road properties and the Keeter property would be added. Chairman Fudala expressed concern about the expansion possibilities at New Seabury and Willowb-end and Mr. Gregg recommended loop at the big picture, suggesting that facilities may be beyond their design-life and could be retrofitted in the future. Regarding dischtrge locations, Mr. Gregg referenced Site 41, Back Road Properties,the High School,.New Seabury, Willowbend and suggested the possibility of relocating the flows of Southport and Mashpee Commons if necessary and the possible deed to use Keeter and the RockLanding site. Existing facilities dealing with their own flows, such as-SouthCape Village, Cotuit Meadows, wampanoag Village, Windchime Point and Stratford Ponds,would be included. Mr. Gregg referenced his neap targeting wastewater volumes and nitrogen levels and emphasized the need to ensure the removal of enough wastewater to meet the TMDL. Areas in Sandwich would need to be Picked up under future loads.and represent a sig wi c .nt amount of flog in the area with high attenuation. Mr. Gregg referenced the Willowbend golf course sites as purple and that the yellow areas would discharge at Site.4. on the west side of town, arm around Johns i Pond and the high school, possibly along with Southport,would be discharged to the Back Road sites. Flows in the center part of town,along with a stretch in Falmouth, would be discharged at Site 7 and may involve treatment at the Keeter or with expansion at Mashpee 2-