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implementation. Additionally,Mr. Gregg referenced the MEP requirements and the need to consider <br /> many sites to balance recharge areas and watersheds. The Chair confirmed that more than one site will <br /> be needed. Commissioners discussed tertiary treatment centers and Mr. Lyons noted that all systems <br /> being considered by the Commission would create clean wastewater, adding the need to remove <br /> nitrogen before discharge. Mr. Klenert expressed concern about pharmaceuticals found in the water. <br /> Mr. Malarkey questioned Mr. Gregg about the amount of effluent that could be handled at proposed <br /> sites and Mr. Gregg responded that estimates have been developed to determine the capacity at various <br /> locations based on existing information, such as nearby test pits from the Board of Health. Detailed <br /> information about the engineering estimates can be found in the Alternative Scenarios Screening and <br /> Site Evaluations report. Mr. Gregg emphasized the need to start with the big picture for planning <br /> purposes prior to conducting detailed testing that will be pursued later in the process to narrow down <br /> appropriate sites. <br /> Lombardo Associates PRB Proposals <br /> Pia Lombardo referenced his proposal submitted to the Sewer Commission that identifies the results <br /> from his activities completed during the previous 2-3 months and recommends a decentralized plan <br /> that would include groundwater treatment and on-site upgrades to reduce the costs of TMDL <br /> compliance. Mr. Lombardo stated that an estimate of$3 million has been suggested for the <br /> decentralized plan but noted the cost could be reduced with groundwater treatment and on-site <br /> upgrades. Mr. Lombardo has assessed available funding sources and suggested consideration of the <br /> State Revolving Fund's(SRF)"Green Reserve" grogram which provides loans with principal <br /> forgiveness. Green Reserve has been used for alternative energy such as windmills and photovoltaic <br /> cells at wastewater treatment centers. Mr. Lombardo added that a delegation from Cape Cod has <br /> advocated that the DEP increase the focus of the Green Reserve to include alternative nutrient removal <br /> strategies that use less electricity_ Mr. Lombardo stated that the use is not yet officially part of the SRF <br /> program but that he assumes it will become the case. The competitive application process is involved <br /> and is a priority system that will require a lot of paperwork The proposal submitted by Mr. Lombardo <br /> identifies four categories of demonstration projects,two that are groundwater treatment, a treatment <br /> plant upgrade and the upgrade of on-site systems. <br /> W. Lombardo referenced the residents in attendance at the meeting from Pirates Cove, the site where <br /> he has proposed a groundwater treatment system demonstration project. After visiting the area, Mr. <br /> Lombardo suggested that the area would technically be a good location. Among the reasons that make <br /> the site amenable as a demonstration project, Mr. Lombardo stated that the permeable reactive barrier <br /> (PRB) could be placed in the shoulder of the road off of the pavement allowing reduced construction <br /> costs and reduced vehicular traffic. Regarding properties along the shoreline, Mr. Lombardo suggested <br /> that the 140 homes could have their flow directed to a small collection system and the 40 homes <br /> directly on the shoreline could have their wastewater collected,treated and returned to a drain field. <br /> Mr. Lombardo described the other option for shoreline homes as taking the septic effluent and building <br /> drain fields on the opposite side of the road where the effluent would travel through soil and a barrier <br /> in order to de-nitrify. Septic systems would remain in place and IIA systems could be disconnected. <br /> Mr. Lombardo shared images of the construction of a large Nitrex system, noting that, after <br /> construction, the system is unseen. Mr. Lombardo described the treatment process where water moves <br /> through the media in the bottom and travels through an up flow filter. <br /> W. Lombardo next shared the two approaches to be used for groundwater treatment. Mr. Lombardo <br /> referenced an example in Waquoit Bay as the first approach where a treatment system is installed in <br /> the groundwater and water naturally flows through it. Advantages and disadvantages exist with the <br /> system. The second option involves a groundwater collection trench to draw the groundwater that will <br /> then be pumped to a treatment site through a PRB and returned to an injection site or drain field. <br /> 3 <br /> l <br />