11/16/2022 PLANNING BOARD Minutes

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M, 16 Great Neck Road North Mashpee, .Massachusetts 02649 Lynne Barbee- As a layperson, she is trying to figure out what, in practice, it means to retrofit an impervious parking lot and making it pervious. She would like to know what that means in practice. She believes they have a massive task to explain nitrogen and fertilizer to people, and if those property owners aren't on the water it doesn't apply to them. Drainage is a massive concern. What would changing that look like? Ms. Cajigas stated they don't have to go impervious to pervious 100%. She is not asking that all parking transition to gravel. You can vegetate, berm around, or use planter boxes to allow infiltration. Those require maintenance due to clogging. Places like UNH in New Hampshire have a huge stormwater program that works on technologies for evaluating and maintaining. You can eliminate by ripping up concrete, using seashells, or doing percentages of pavement by removing the hard surface. Ms. Belfit explained when it comes to repaving, you take the void and it looks like regular pavement, but it is an impervious surface. It requires maintenance as you don't want to sand those roads or driveways because that clogs it so they rely on salt. There may be areas where it's not the best fit environmentally. Ms. Faulkner asked where porous roads would be suitable. Ms. Belfit noted it is mostly used in sections of highways. Ms. Laurent stated there is a private neighborhood that is petitioning for an area of porous roadways that is low lying and in the floodplain. Monomoscoy Road has the same reason, they have a high ground water table. Ms. Faulkner inquired about the longevity and costs of the porous roads. Ms. Laurent explained that the roads are currently swept twice a year, but porous roads need to be vacuum cleaned versus swept. She is unsure if twice a year is sufficient in this case. It's the materials that come from being on Cape Cod that present as clogging issues, as well as surrounding properties. Provincetown has a section of Commercial Street using this technique and they are currently looking into what they do for best management. Mr. Hansen was involved in a project off Cape forty years ago where they discussed gray water systems. Road and roof runoff was encouraged to go into a gray system to irrigate during times of drought.