Special Board of Aldermen 10-14-2021 Page 20
Alderman Lopez
And just to clarify, PPhos is in that too or is that...
Noelle Osborne, Plant Operations Supervisor
PPhos is everywhere. So that's not anything that we have regulations on yet PPhos but the Class V biosolids we have
at the wastewater facility and anaerobic digester which takes some of those pathogens and those viruses out of the of
the product. It reduces the volume. It reduces the odor. That's why you don't have a lot of odors from Nashua’s
wastewater facility. It is a heavily regulated. It's trucked off site. Usually the farmlands are in the northern part of the
State. Class B tends to go to crops that animals would eat not people. So there's that level. There is further treatment
that we could do Class A that we're currently exploring and that would be a product that, you Know, you could come pick
up at the wastewater plant and spread in your gardens. It's pretty inert at that point. Merrimack does that. Residents
are able to come and get that Class A biosolid from them, but we're not there yet. We're at Class B so phosphorus yes
is a non-renewable resource and its black gold for those farmers that are using it.
Alderman Lopez
| just want to dispel any rumors that were sprinkling or poo on orchards or whatever
Alderman Jette
So there's the stormwater - | understand we try to separate the stormwater from sewerage. Does the stormwater go
directly into the river or does that get treated?
Dave Boucher, Wastewater Superintendent
Some stormwater goes to the river and is not plumbed into the wastewater facility. But the ones that is in the combined
system or the sewer system that has just storm water will come to the wastewater facility and be treated. It's not
separated at the facility. It’s treated just like its sewage.
Alderman Jette
Okay, so how much of it goes directly into the river?
Dave Boucher, Wastewater Superintendent
I'm not sure of a percentage that goes to the river direct.
Alderman Jette
And the EPA is okay with that? We're okay doing that? | understand that stormwater it's not just pure rainwater. Its
water that's gone over the street, picked up oil, and other pollutants and so it raises the question, in my mind, why would
we be allowed to dump that directly into the river?
Dave Boucher, Wastewater Superintendent
| believe that was a decision made by the city to not separate but build a wet weather treatment facility, which would
allow us to take in as much as possible and treat. There are some outlier areas where it's not feasible the plummeting
currently to the collection system.
Lisa Fauteux, Director of Public Works
No, | don't think - let me let me take a stab at that Dave. | think what Alderman Jette is saying that why isn't all of the
stormwater being treated that's going to the river, correct?
Alderman Jette
Correct.
