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"megan iron" Discussed on Words on Water
"Got word. This episode is brought to you by adage water technologies. Adage, specializes in the design development, fabrication and supply of water treatment solutions. Specialty media's legacy in innovative technologies that remove a wide range of contaminants from water. They extensive experience in the removal of arsenic. Iron manganese hydrogen sulfide, fluoride nitrate in uranium from water. And if sold hundreds of water systems ranging from five gallons per minute to over twenty million gallons per day in North America and locations throughout the world. Visit them online at adage, tech dot com. Hi, welcome to words on water. A podcast from the water environment federation, this is the host Travis loop gonna be talking about something today that I don't know a lot about. And I'm very excited have some experts with me to explain de watering, hopefully this help some listeners, also I'm sure there's a wide range of what people know and don't know about this topic. So I'm glad to be joined by two folks from adage. I have free Hassan a project manager and Brit, Merola applications engineer Brit, how're you doing? I'm good. I'm good for you. How are you? And Brian, thanks for having us. Yeah. Absolutely. Let's go with kind of de watering one a one here. What is de watering? Pretty common practice in construction, and it's a term used to generically to describe the process for groundwater. It's extracted the temporarily or permanently lower the water table. And there's two reasons you might do that one his for short term construction, which would be temporary, or if you're building something that would be subsurface garage or basement in that case, you'd have to permanently lower the groundwater table when need permanent de watering equipment set up to continue doing that over the life building and is required. So that you have dry and stable environment in order to build your foundation upon so adage, our specialty is treating the de watering water. That's produced as part of permanent de watering. Structures. Several different installations on that far yet has been project manager, but few of them, and she can go into more detail about some of the specifics in the details of each of two Travis. We are currently working on a two hundred sixteen GP Amrita de watering system in this one is for iron in Maine Guineas removal and the project in Colorado. Now in two thousand eleven we started up another project in Colorado. But this had a much smaller flow rate of only fifty gallons per minute. However, this site had trick your water quality with very high levels of iron and Megan's. Iron was around four point six to seven point, four milligrams per liter and manganese was about four point five milligrams per liter. Now a couple years later in two thousand fifteen we did a project where selenium was a contaminant of concern to be treated for. So as Brit mentioned, you can see the contaminants for treatment would really vary from site to site. Yeah. Definitely sounds like it. It's a very case by case kind of process with de watering wanna learn a little bit more about this. How, how exactly is de watering done? What's the what's the process when you come into a brand new project? Sure. So as Brett had mentioned the de watering process, typically involves intercepting, the shallow aquifer rounding structure. And then you would pump that water continuously from a series of groundwater extraction. Wells in order to blow were the overall water table, and therefore essentially allowed construction areas to remain dry and then one of the really important things to consider is that as you extract all this water. Would he do that? And there's a lot of regulations involved in in what gets done depending on where you wanna those of it. But, but typically, if you have a permanent installation, you need to consider, what's in that wander in how you're gonna treat it in. So it's a site to site incineration, but you might have to treat four suspended solids. You might have to cheap earn a Mangum use. You might have to treat for arsenic, or reading guide. And then you have to handle that waste in, so it's, it's a two steps of on extracting the water and the entreating, it's too, that you can dispose off site. So what are the couple questions that will come off of that? So what are what is the what are the usual water quality challenges? I know you said that varies a lot site to site, and that makes sense because you're dealing with different soils and different, you know, jogger fee and all that kind of good thing, but what are. Are like the usual water quality issues that you have to deal with de watering, we think of three typical challenges when you're looking at a D water site on your panels of sediment. I mean you're moving you're on a construction site. You're moving earthworks around that, that would make sense to you naturally. We also can see high ph especially if you're near grouting, or concrete work, and then naturally occurring contaminants, that already existed in water that you were extracting, so the sedimentation, high levels of sediment, and elevated ph those are most problematic in temporary water operations were, you've waters being removed, an active construction site. You need to treat it or sometimes you don't depending on where you are. But then you discontinue de watering end. You don't have to consider it anymore on permanently watering. Locations. You that's when you really have to think about the naturally occurring contaminants because they're gonna they're already in the water, they're gonna remain in the water. Irregardless of, of what else is happening in. So I need to consider what they are in what your treatment standards that you need to hit. Are you take this water out? You treat the water. What usually happens with it, then where's, where's the water gonna go is, this is something shorter can be discharged into a waterway has to go to treatment, you know, a, a water treatment facility to travel through the couple of options in. It's really dependent on a few different factors. For example, there's a lot of regulations that govern what happens to the water, including federal, state, and county regulations. And in addition to that, we have NPD s which is national pollutant discharge limitation in construction permits could apply. The water quality can also come into play on. Pending on any discharge restrictions for where the water will actually be disposed to, whether it's a lake or a river, different bodies of water may have their own restrictions. Now, typically water is commonly discharged local sanitary, sewer when this option is available and while a sanitary, sewer disposal does not typically require permit sometimes it can. And it really just depends on the local forty there and permits overall are typically not required when water is reused on the construction site discharged, Jason land used at an adjacent facility or tweeted off site. You had mentioned you touched on regulations a little bit, and the idea that they're gonna really vary from state to state, or so forth. Could you talk a little bit more about the regulations around de watering, Yep? Absolutely. So the regulations for de watering stem from the nineteen eighty seven amendment to the clean water act. Which essentially controls the discharges of pollutants from municipal separate storm, sewer systems, construction sites and industrial activities. So the regulations required construction inst- Ramada discharge to comply with NPS hermit. I described earlier or other state in county permit requirements, which could also apply. The thing that strikes me about de watering as there's like so many different factors and variables involved from site to site from what's in the water to how the how the ground set up, what the regulations are where you have to take the water. How, how is it you know, working in, in this kind of field with her so much variability in so much case by case there? You're absolutely right. I mean, the, the host of the different contaminants that you're evaluating looking at is really you're limited anything. He could possibly find mater, so that upper -tunities for different treatment approaches are there, and you also have to get creative because you have to consider if these are going things, Harpen garages or face mints, you might have a physical footprint challenges hit as well. So you have a low ceiling or a very limited space at your needs to fit into in so really, it's really important to have a very firm grasp of the water quality, tough firm grasp of the site requirements and in what you're building in ended what the spaces that you have to work with in also where the water is governing. One thing we haven't really talked about is what happens if you are generating sledge way store if you don't have cemetery sewer unsightly zone those situations. We might need to consider some sort of recycled system where we can recycle backwash water through to the front of the tree of plant and collect end concentrate sludge to be disposed of offsite as a as a solid going to rain fill. And so those are all the different things you have to consider in order to have a de watering site that, that works in that successful, the long-term free. What about for you? What's it like working in this area with with just show much variability from situation situation in Travis, managing these projects. It's actually very exciting because you never know what you're gonna get in as Brit said it can be sometimes challenging depending on the different water quality. But that's what makes the projects interesting is that each project is unique and different types of treatment technology is used and whether you how case scenario as sprint described, where you'll have to deal with solace management. In able to recycle that water. That's what makes the project fund for us or fun for myself. So sometimes can be a little bit trickier than others, depending on the type of contaminants in the water and the different type of technologies needed if you can just work with one. If you're trading for Megan or if you have multiple contaminants that you have to deal with, whether it suspended, solids in arsenic, and iron manganese, or whatever the case is, so the good thing about it is that it's never the same. So you're always learning makes a lot of sense. Speaking of never being the same. You know, there's a lot of change happening now in the water sector because of technology and innovation. You know, our digital era that we're in. And I'm just wondering if you could talk about maybe some of the emerging trends in de watering or technology improvements that are changing things come aware where it's all headed look into your crystal ball for a moment here. So our full start off your first. So as we know the water industry is sometimes it can be slow to adjust innovation now as communities residences businesses and excetera are adapting to new sustainability objectives, and the technologies radically changing we do expect significant improvements in the efficiency of de watering technology in the future now here adage, committed to being at the forefront of these changes in were always seeking ways to improve our methods to treat the water. That's created as the spy product of D watering, now, a great example of adages dedication is our eighty twenty six