July 30, 2024 Planning Board Special Meeting Transcript - WEHI

19 (Pages 70 to 73) Page 70 1 left. 2 MR. ALPER: Okay. I believe that's 3 the reservoir source for New Jersey water, so I'm 4 wondering if they weigh in on a project like this, 5 if that's DEP's responsibility. 6 MR. ANDERSON: I don't know if they 7 weigh in or not; I've never seen them weigh in on 8 any of our past applications for this. We have a 9 very minor impact in terms of that wetland area over 10 there, I mean, we just have one headwall from the 11 discharge from Basin 1 in that location. 12 MR. ALPER: So it shouldn't be the 13 case that any construction debris or anything would 14 end up in the waterway. 15 MR. ANDERSON: Should not. 16 MR. ALPER: On the stormwater water 17 discharge on that, I know you say, you know, 18 obviously, you have to reduce the current discharge, 19 but the current discharge is from nature, right? So 20 it's the trees and the soil and the waste of the 21 animals that live on the site. 22 MR. ANDERSON: Right. 23 MR. ALPER: When that changes and the 24 runoff becomes, you know, what's in the parking lots 25 in oil and the residue from human habitation, how Page 71 1 does that figure into the calculations -- 2 MR. ANDERSON: So -- 3 MR. ALPER: -- and the requirements? 4 MR. ANDERSON: It's not a volume 5 calculation. Part of the design is -- there's three 6 parameters, there's water quality, water quantity, 7 the discharge rate and groundwater discharge. So 8 there are green technologies associated with various 9 stormwater management devices, so small-scale 10 infiltration basins are considered green technology. 11 The water comes in and it has a pretreatment device 12 for each surface basin and then it absorbs water 13 into the ground and also has water quality elements 14 in the basin itself. Okay? And then the water that 15 is actually discharged to the outlet structure is to 16 have 80 percent suspended solids removed from it 17 prior to it discharging. So the design includes 18 that kind of technology. 19 In the case of the large-scale 20 detention basin that we have that goes to Canoe 21 Brook, that -- a large-scale does not provide the 22 water quality element so we had to have 80 percent 23 removal with filtration devices prior to the 24 discharge into the basin, so the oils and greases or 25 whatever you're finding from the site goes through, Page 72 1 in this case, we've used a Filterra, which is a tree 2 planter and

prior to the 24 discharge into the basin, so the oils and greases or 25 whatever you're finding from the site goes through, Page 72 1 in this case, we've used a Filterra, which is a tree 2 planter and a medium and the water goes through and 3 filters through the medium, and then once it's 4 filtered through, it goes down to the basin for 5 quantity control, and so that's how that's handled. 6 MR. ALPER: Okay. 7 MR. ANDERSON: The porous pavement 8 systems are similar, they are -- they are green 9 technology for quantity, quality and groundwater 10 recharge, so those other ones that are up on the top 11 of the hill on those parking lots take care of 12 themselves independently at the top of the hill. 13 MR. ALPER: Got it. On the trees, the 14 number you said, 5,904, is that the number that's 15 actually being removed or is that the obligation 16 that you need to replace? Because I thought you had 17 given a formula 212 trees per acre times 27 point -- 18 acres and that is where the 5904 came from; I wasn't 19 sure if that was the exact same number that was also 20 coming down. 21 MR. ANDERSON: So there was an 22 estimate of the amount of trees in the forest based 23 on a study done years ago and it was decided to put 24 into the ordinance a 212 trees per acre, and the 25 replacement was based on a one-for-one tree Page 73 1 replacement -- 2 MR. ALPER: Got it. 3 MR. ANDERSON: -- and we have -- let 4 me just get my number right. We have the 27.85 5 acres of disturbance and we have -- let me find it 6 -- we have 5,904 trees required to be replaced based 7 on the 212 times the acreage, and so that's what we 8 have to replace. 9 MR. ALPER: Got it. 10 MR. ANDERSON: And they also gave a 11 similar credit to the deer fencing, 212 per acre. 12 MR. ALPER: So it's 212 per acre of 13 deer fencing? 14 MR. ANDERSON: For the -- yes, for the 15 placement of deer fencing, correct. 16 MR. ALPER: So each acre of deer 17 fencing counts as 212 trees -- 18 MR. ANDERSON: Correct. 19 MR. ALPER: -- though it's not, 20 obviously, any -- one tree, let alone -- 21 MR. ANDERSON: It's not adding trees, 22 it's just making that portion of the forest 23 healthier. 24 MEMBER OF THE PUBLIC: No way. 25 MR. ALPER: Okay. That's all I got.