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Town of Mashpee Sewer Commission <br /> t <br /> 16 Great Neck Road North <br /> Mashpee, MA 02649 <br /> titled, "Mashpee WRRF—How does it work?" Mr. Nair asked if the information regarding effluent limits <br /> and flow referred to the plant or did it refer to just Phase 1. Mr. Drainville answered that what is being <br /> shown on the slide is maximum day flow and that is what DEP permits the discharge facilities for.The <br /> equivalent average daily flow is 120,000 gallons. Mr. Lyons asked if that is using all 8 (eight) pits or all 4 <br /> (four) lines. Mr. Drainville answered that there is one (1) stage but divided into two (2) tanks, so this <br /> permit covers one stage and two (2)tanks, and you need four(4) active sand beds for it. Mr. Lyons <br /> asked if it was limiting the plant or is it just limiting what the Town is starting up with. Mr. Drainville <br /> answered that it is just what it is being started up with and that there isn't any phosphorus in this permit <br /> as it is not an issue in this area since the discharge is not near a pond. Mr. Meader then explained the <br /> phosphorus removal steps. It is removing phosphorus from the areas that need to have it removed but it <br /> is being redeposited back into the ground far enough away from freshwater sources. Mr. Nair asked Mr. <br /> Drainville at what point in the process do they take the measurement for the influent measurement? <br /> Mr. Drainville answered right as the water is coming into the facility. Mr. Meader also answered Mr. <br /> Nair and stated that the raw wastewater will be sampled at the lift station screening building since it has <br /> not been treated yet and then again after the whole treatment process so that it can be compared. Mr. <br /> Drainville stated that"influent" is what is coming into the building and "effluent" is what is leaving the <br /> building. Mr. Nair asked Mr. Drainville if there is a holding tank before it comes into the process building <br /> and if there is not, and it backs up, what happens? Mr. Drainville answered that there is not a holding <br /> tank and that these preliminary treatments at the facilities are designed for the peak flow of the facility. <br /> Mr. Nair asked if there is UPS at the facility(Underground Power Supply)? Mr. Meader answered that <br /> there is UPS and also generator backup. Mr. Drainville also stated that each computer at the plant has a <br /> UPS as well. Mr. Nair asked if this was in-line monitoring? Mr. Meader answered that it is tested via <br /> ground testing, and it is done every day. Mr. Nair asked what happens to the grit? Mr. Meader answered <br /> that since it is an inorganic material, it can be packed into the trucks and transported to the dump. Mr. <br /> Nair asked if there is any radiation from the UV Disinfection System? Mr. Drainville answered no.They <br /> are underground and covered in concrete. Mr. Meader stated that the UV Disinfection System does not <br /> kill the bacteria and, instead, damages the bacteria cell so it cannot reproduce and grow in the body. <br /> Ms. Sprout asked Mr. Drainville if, since 2015, there have been advantages taken with the advancement <br /> in technology. Mr. Drainville answered that with Membrane Technology, although it existed 10 years <br /> ago, it was not as common. Chair Harris asked as the Town moves forward to the next stages in the <br /> Clean Water Plan, are there other technologies that should be considered? Mr. Drainville answered that <br /> this is the right technology for the Town of Mashpee as this is the smallest footprint for treatment <br /> technology. Ms. Sprout asked about the treatment of the sludge and if there is anything on the horizon <br /> for sludge treatment in MA? Mr. Drainville answered that right now liquid sludge is being stored <br /> because there is not a lot of sludge but as you grow, you want to take out the water from the sludge and <br /> would occur potentially fairly soon (de-watering)which would reduce the cost of hauling, Right now the <br /> bio-solids landscape is complicate by the p-phos problem provides some limitations on what can be <br /> done with it.There is expensive cutting-edge technology, but it is not suitable for the small facility that <br /> Town of Mashpee has. He suggested continuing de-watering and seeing what is going to happen with <br /> the p-phos regulations as it is unsettled. Ms. Castaneda asked if the de-watering gets rid of p-phos? Mr. <br /> Drainville answered no, it does not. You need some kind of thermal destruction to get rid of p-phos. Mr. <br /> Meader stated that wet sludge is the hardest to get rid of, so the first step is to de-water.The water <br /> from de-watering is run through the treatment process again in the system before being sent back out. <br /> Mr. Lyons asked if Mr. Drainville's presentation will be available on the website, and it will be. <br /> Chair's Report <br /> The Chair reported that she wanted to emphasize that,as we move forward to the plant being operational, <br /> the need for education information, communication, Q&A periods, polling communication experts, like <br />