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>> Okay. Um >> we may say, "Yeah, this is fine. Don't build the big system, the bigger system." But the EP may still appeal that. Okay, why don't I'm going to turn it back over to to Will. Maybe maybe we we pause, we put a t thumbtack on this issue and kind of go through the other comments, see and maybe circle back at the end and see where we are. >> Sure. >> All right. Yes, let's move along. So, uh, Mr. Crouch kind of beat the punchline. We wanted to check with the commission just to confirm that the direction agreed with the peer reviewer that we needed to chase that one CFS. Today we scrambled once we got indication that it would still not be in GCG's mind uh that it was still substantial. We scrambled to show what an enlarged system would be required so that there is no net increase.
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>> Yep. >> Uh what are some other roles that we had? >> We had a amphibian researcher, we had um arborists, we had ice drill scientists, we had >> snow physicist. >> Yes, we had physicists. Um I'm trying to think. We had a coral researcher. So the whole goal is like boots on the ground scientists talking to science teachers so that they can learn the science more. But also we had educational institutions like National Center for Science Education and Illinois Science Teachers like all these great groups that create lessons to help teachers so that and we sent out a survey literally this morning and the feedback coming back is fantastic. Shocker. Um they they're all saying like it was one of the best institute days that they went to. Sorry, we're and they walked away with not only knowledge about these topics, but also things that like some of them are said, I I'm going to put them into play this week.
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So that's what Mr. Crouch is looking at a simple sketch showing the enlarged footprint um and the peak discharge rate summary table that shows zero increase in the 100red-year storm. Okay, next comment. Uh GCJ acknowledges that the um 12-in RCP pipe replacement is within the 100 foot buffer. Um we all agree with that. We showed it on the replacement sketch included in the drawings. Um, next topic number seven is same is consistent with all the peak disundredyear peak discharge rate increase discussion. The next comment number eight has to do with um porous pavement. Um they acknowledge there's some planning considerations in the D handbook. Um, we believe we meet the in um the placement of this um porous pavement to help with our storm water design uh meets the intent of those um planning considerations and we acknowledge the extra additional signage and maintenance that will be required and it's a comment further down but we will be adding that to the on andm plan and be submitting that in the next few days.
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They're already prepackaged and ready to go. And so that's kind of the goal of the conference is to provide the science knowledge that a lot of teachers need um and that they sometimes don't have enough time to read about on their own and give them that day to to really nerd it out, right? Like that's the whole goal is to be nerds for the whole day. So >> and the picture on the left again, student volunteers. >> Yep. Their day off. They chose to come to us >> and network with professionals. >> Absolutely incredible bunch. Next one. >> So, we had some keynote speakers. If you go, there they are. So, there's three of them. We have Dr. Eric Austerberg on the left. Uh, he's an associate professor at Dartmouth University. We also have Dr. K. So, we had a family team to finish off in the auditorium as a double keynote.
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The next comment number nine has to do with uh pre-treatment uh sorry has to do with uh re uh groundwater recharge. My understanding of the comment is, as this commission may be aware, when not all of a site can be routed to an infiltration basin, you can do a weighted calculation where you oversize the groundwater recharge to compensate for areas that aren't routed to it. Um, we submitted those calculations with the notice of intent. Um, but I believe they're just acknowledging there's a rule that at least 65% of your area needs to be routed to infiltration if you're going to if you're going to go with that weighted calculation. And we we provide 75% of our area is routed to infiltration. So we meet that um we will resubmit the calcs and and underline um that coverage requirement as well. Uh comment number 10 and there's a few others uh are regarding the um imper impermeable liner that the subsurface um detention system will be wrapped in.
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Dr. Karen and Dr. Richard Ally. Dr. Karen Alli is University of Manitoba. That's where she works. As well as Dr. Richard Ally at Penn State University. So these are real scientists like a lot of our other scientists that are leading these breakout sessions, but these three did full keynotes in the auditorium for all of us 500 together. And it was just fascinating to see what they had to share in terms of we have hope. We have hope in our climate. And that was really the the theme of their presentations of their keynotes. >> And they care so much just like everybody else at the conference. They do all this on their own dime. So we don't have a budget. They just all the people that presented, all the keynote speakers, they did this because they care. And just so you know, Dr. Richard Ali is a Nobel Prize-winning scientist, too.
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Uh the details uh do show that infiltrate that jez that impermeable liner. Um we can provide more specifics on it. I believe it shows the liner fully wrapped around on the bottom, sides, and top with geoexile um fabric on the inside and outside to further prevent um puncture or wear and tear of that system either during construction or after installation. um we can provide additional specifics like the type of um product that we typically see in these applications and maybe add a few notes on the installation that if these come in enormous rolls. They're meant to cover very large systems like you know reservoirs and stuff. Um they come in very large rolls and the off chance it can't cover the whole system in one piece. Um, the installers know a system where you overlap it and then tape on both sides with a water-resistant tape so it's a seamless installation if they have to have a seam in it.
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So, >> they just they and they they said, "This is amazing. We need to start doing this in more places for other teachers." So, >> it's also because of this guy. >> It's because of him. >> So, these are just some pictures. You can see breakouts. We had three different sessions. We had feedback of teachers that said, "Gosh, I don't know what to choose. It's a great problem to have. I could not pick because I wanted to go to all." And it was a logistical nightmare because I wanted to go to every single session. Uh the rooms were full so you can see some of the classrooms. We had a banner of climate of hope that every participant we really wanted to sign. We'd love to get that on the wall somewhere just to capture that that energy, that hype that we had uh for our climate.
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So, we can add more notes to that effect if the commission would like. Um on GCG page six, uh believe everyone is acknowledging a commitment to um provide additional confirmatory test pits at the start of construction witnessed by the town. Further down on the page, um, on page six, uh, GCG agrees, um, the applicant has the right to choose any acceptable pipe material that meets the loading requirements in a private development. That just, uh, has to do with the CMP pipe and the steps we're taking to make sure the corrosion resistant is maximized. There's a few comments on page seven. Um, GCG acknowledged that we've reviewed removed um or deleted rather uh the catch basin that was close to the exposed ledge along Waverly Street just to having to avoid any um rock removal that close to the ledge face and we did some minor regrading to make sure that parking area drains to other catch basins.
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And then you can see that is Mike Hind showing the ice core to the student volunteers. Whenever there's an educational opportunity, we will make it uh for our next generation. >> And if you don't know those ice scores, by the way, they're from either Greenland or Antarctica. And the Antarctica when we got donated this year was a 10,000y old ice core. >> Talk about cool, huh? >> It's an ice core. We got it. We got it. >> All right. Okay. Well, pause for dramatic effects, you know. >> We'll laugh later. >> If you have to explain it. >> Yeah. >> And it's a true dad fight. >> So, this is a highlight of Thursday. >> Yes. >> Uh, so at Mor Arburedum, we hosted 64 students from 20 high schools and one of those was actually a school from Sacramento, California. >> Yeah. A teacher brought two students and another chaperon along with >> and it was absolutely wonderful impact.
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17A is just a very small uh modeling observation. Um we'll will not have zero effect on the modeling but we'll we'll check that when we submit the calcs to support this similar to the one that right below where they say is resolved. Um just a little dotting eyes crossing tees. Skipping ahead to GCG page nine. Um, this all has to do with the 100red-year storm. So, let's punt on that. Um, further down the page, buoyancy calculations um were acceptable and again they ask um for more details on the impermeable liner to ensure water tightness. The bottom of the page is another resolved comment. Next page 10 towards the top. Um they recommend uh orifice a trash rack on a very small orifice in the outlet control structure of the surface basin. Uh and we agree um water leaves the basin through a 12-in culvert. Um and it's more prone to get something in there.
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You can see they there are some videos. >> Sorry you might have to click two more times doing a wonderful job. >> This is you can see they are actually rigging >> an unsuccessful attempt which it's science right experiments are going to fail. And you can click on this one and you'll see another opportunity and that was successful. And what they're doing is that uh we had Alden, our snow physicist, talk to the students and did a little uh learning up front of how we actually extract the ice core from the ground. And then we turn it over to the students with a little bit of direction for them to design with Tootsie Rolls. Very hard Tootsie Rolls or they have to soften uh and the wood sticks that you see there. and they were able to rig a device between two tables to try to bring up an ice core just like in real life.
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So, we'll add a trash rack. Halfway down the page is another comment on the confirmatory test pits uh in early construction. Next to page 11 towards the top, um same 100year storm uh comment. Halfway down uh as I mentioned earlier, we will add porous pavement to the onm plan. Uh, comment 14 on that page has to do with TSS removal. Um, we've had a good amount of back and forth with GCG on TSS removal. Um, and at this point, just to clean things up, we are leaning towards relying on the um third party testing, the NJCAT testing of this contact cascade- CS4 model. Um, we submitted those materials and and they they show the the third party testing shows uh 80% removal. So, we're >> Yes, >> that's surprising. >> It's a good product. That's why we like to uh specify it. Um so uh we submitted today the standard DP worksheets for TSS removal that show um deep sump hooded catch basins uh removing 25% water quality pre-treatment units removing 80% and where infiltration is provided an additional 80% um through the BMP itself.
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>> And it was really cool to see them struggle, right? Like that that is learning and to them to collaborate and work together and then the joy around, hey, we actually got it. And there was a challenge that they actually then had to roll it on the table in order to bring it to let's say wherever their final destination of the ice core was. So really neat event. You can see Dr. Richard Alli, our keynote, some of these scientists dedicated not only one day but two days with us and we're just forever grateful for their time. And then you can see the D99 family. If you go back one more, that one picture right there, that is me with all of our students that attended this uh conference. So we had 13 students north and south from of the 64 that represented district 99. Y.
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So depending on the final BMP and the treatment train um each each train provides either 85 or 97% removal and these are uh you know D worksheets and these removal rates and the and the NJCAT um verification have been um widely accepted by D on dozens of projects um that our firm has done. Can I what what is about this design that makes it so much more efficient? Because most of these things don't get anywhere near 80%. I mean, in a in I did a study, a real life sampling of of a storm center, we didn't get anywhere near 80%. We didn't we were getting like 30% at best. In some cases we were getting higher numbers downstream than upstream. >> So it was putting turbidity into the or yeah >> tss into the system. Well, we, you know, we get a lot of vendors who try to sell us their products, and I should have paid more attention in those lunch and learn so I could answer that more clearly, but a lot of it has to do with the design of the um the vortex thing, uh, you know, the you the insert that goes into the structure.
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>> Oh, and it should be noted that the Morton Arburedum donated everything for us, the space, all the stuff. Um, the only thing we had to get was the lunches for the kids. So, um, fantastic. Everybody's in on it, right? This is important stuff. So, community is well aware of it and they're pitching in too. So, it's fantastic. >> We mentioned a few, but just thank you to the community. Honestly, >> these are all the people that showed up to Climate of Hope, right? So, they all brought presenters. They all helped give away things to all our attendees. Um, yeah, it just shows it's important, right? And, uh, everybody's in on it. So, it was great. A lot of networking. I think everybody walked away with something, whether it be a bad joke or at least some science knowledge, right? >> So, anyhow, questions at all or >> Yeah, the the u the passion that you guys have towards science is contagious.
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my understanding the biggest um contributor to and probably the exact reason why you experienced that is the sump depth and size. Um, that's where a lot of manufacturers save money is having a sump that's inadequate for the the sediment that's removed and that coupled with a bad maintenance plan. Um, that sediment is just sitting there ready to get scooped up in the first flush. >> Whereas I think contact in particular prides themselves with sizing the sump correctly uh along with the TSS removal depending on the flow rates. you know, it's a diff you can't put you can't spec the same product that's expected to remove sediment for one CFS versus 10. >> Um, and we work with them early and check in often during these designs to make sure that we're using the right products. Um, and on this project, I think four of our six products are the um, Cascade 4 and we upsize them accordingly.
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>> Thank you. And I really don't even like science, >> but I really do now. I mean, it's really contagious. And our students are so blessed to have you guys as educators teaching them every day. I mean, it's really fantastic what you you guys are doing. So, keep up the great work. >> Thanks. >> Yeah. >> Well, we're going to do all this again sometime in the future, right? >> Yeah. >> So, let's invite you guys on over. If you want to come conference or or climate of hope, we'd love to have you. >> And it really says a lot that the students come out >> on their day off >> to to participate. >> Absolutely. >> I think you're contributing to the reputation of our district as well. >> Yeah. I mean, the the fact that you're collaborating with all of these fantastic organizations, bringing in teachers from all over the region and the country.
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Um, >> if the flow >> and they're offline, I assume, >> correct? your offline designs. >> Yes. >> Yeah. Okay. >> Or there's a sorry uh there's an internal bypass once it exceeds that >> it's internal. Yes. >> Oh, okay. Okay. I don't know. Just I went through the numbers on your spreadsheet and I said even if you considered only 50%, you're still making 93% or something like that. um with the unit um because you've got a um infiltration system downstream that gets you 80. Anyway, >> uh you're you're correct. Um GCG made the comment and and we agree that the the two systems that are detention only do not provide 80% that downstream BMP. So that's why we, you know, raised our hand and said this third party does say they have 80. So that the the two BMP treatment trains that have detention at the downstream, uh, those are the ones that have 25% multiplied by 80% gives you a 85% removal.
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>> Um, we we're all very proud of you in that regard >> and I've attended one of these and found it extremely interesting myself. >> Yeah. >> So, thank you. Thank you so much. You guys all deserve a great pat on the back as you >> and a nap. >> Really? Yeah. And a nap for sure. One of the things that we hold really dear to our hearts here in this district is our professional development. And I think it just goes a long way to see this collaboration um between everybody in the science department. Christine is working with these guys all the time to make sure that all of the details are set and it was just a really beautiful day. So, thank you for letting us highlight it tonight. >> Well, speaking of the community, so we are all I think we're all wearing these bracelets still.
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