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Matt agrees, sub watershed by town. Tom asked if we should do a screening scenario, sewer everything at 5 parts discharge and do we meet the target? How much room is there to play with, based on build out? Pio Lombardo said a lot of the comments are in agreement. The process needs to play itself out. Determine: 1. where is the nitrogen coming from 2. how much needs to be removed—all scenarios need to achieve that target. At the next level, discuss the costs, at this point there is a lot of fine tuning. Speed for remediation is a factor: how long will it take for the system to respond. Phasing is an additional layer. He agrees that non wastewater sources are a concern. Table 8-2 shows non ww sources, in some locations greater than wastewater. It may be less expensive to deal with those. The Nitrex scenario treats stormwater. Residents may be willing to spend more money if they see results quickly. Matt is concerned about treating close to bays first. We can attach a localized area but are blinded by the area behind it for the next 20 years. Where are the areas of natural attenuation—take advantage of them. Ken Malloy believes the priority areas are already defined, on the map, as red, blue and yellow. Should start with red as priority area. Tom said we don't yet know if sewering red areas meet the targets. S&W must run the model. Don said there are basically 2 ways to look at it: - start by sewering everything and pick pieces off - add on little by little until we meet TMDLs. We have to start somewhere. Ed Baker said a large amount of the nitrogen coming in the Mashpee River is from area near the industrial park, with the rest from "further back". The contribution is not from the few, seasonal waterfront houses. He is lobbying for starting furthest away. Don said if the decisions are political, and we have to "sell this"to residents, then we should start closest to the waterfront for quicker response. However, he know, we are not doing this for ourselves but for our grandchildren. Tom developed a list of possible scenarios based on the last meeting: 1. Gravity/low pressure sewers to municipal plants, ignoring existing private systems. Jeff said for this, the technology does not matter at first, will filter that out later. 2. Same as 41 with addition of expanding on existing private systems. S & W will need to know their capacity and what kind of performance they achieve. Not all are appropriate for expansion. Jeff said there is a permitted amount but can be upgraded. He will look at plans of the plants. 3. Nitrex de-nite technology: Cluster systems scenarios, with Nitrex or other technology. Nitrex is appropriate for neighborhood size facilities. Those 3 scenarios do not look at town boundaries. 4. Focusing facilities on parts of the watershed closes to the bay, in order to get some embayment cleaned up quickly.