 joining us here for another short webinar hosted by Hydra Terra. I hope you're all staying safe out there in these trying times. These webinars will be an ongoing exercise for us for the coming weeks and months on a whole range of various technologies and supplies that we represent here at Hydra Terra. So just be on the lookout for these in the not too distant future as we continue to provide you with these short webinars and appreciate you all taking the time to hopefully expand your knowledge and guide your decisions a bit better when selecting appropriately in this instance silenced pneumatic pump that may meet your needs. For those of you that aren't familiar with myself, my name is Kyle McLaren. I'm the sales manager here at Hydra Terra and I'll be taking you through today a bit of a comparison between two of the solence pumps in the 407 bladder pump and the 408 double valve pump. I'm also joined by Michelle who is the general manager here at Hydra Terra and is our organizer for these webinars. So thanks Michelle for making sure that things run smoothly with these. So just a bit of housekeeping firstly for those who haven't joined us in a webinar before. We have a questions or Q&A box at the top here and please as we go along if you guys have any burning questions feel free to type those into the questions box and leave a bit of time at the end to read those out and I'll answer as many as I can. We ran out of time, I'll endeavour to answer those individually but we'll try and answer as many as we can today with everyone present. So we see this opportunity when a lot of us maybe have a bit more time at home in the case of fellow Victorians at the moment to be able to generate greater technology awareness I suppose on what may be out there and what we've seen. Stimulates some learning through training but also just get an insight into what you guys are doing. We're always interested here at Hydra Terra in the new and exciting projects that are out there and what are you guys missing? What would you like to see? This really helps us I suppose develop and grow into a business that can assist our clients as effectively and efficiently as we can. So just quickly as I'm sure many of you are familiar with Solanced but on the off chance that there are some of you which may not have heard of them. We've represented Solanced here in Australia as exclusive distributors for around 14 or 15 years now. They're a Canadian company with over 40 years in developing environmental monitoring technology and one of the few remaining environmental companies are still independently owned. In the coming weeks and months we'll be going through a few of the technologies offered by Solanced in particular the level loggers which are quite popular with our clients, multi-level systems, pyzometers and in this case today some of the pneumatic offerings for ground water pumps. So the program today I'm just going to run through a bit of the specifications on both the 407 and the 408 double valve pump. We'll look at the differences between the two pumps, a bit of a cross comparison between the two which will help in your selection. Process. A bit of the Solanced controller options and air supply options as well. We'll probably do a separate webinar on that. I'll just touch quickly on that today. But there's a lot to talk about in that space. So there'll probably be a separate webinar which will delve into those in a little bit more detail. The troubleshooting tips that we've found in our time here with these pumps and our experiences with them that can probably assist you guys in future when utilizing these types of pumps from Solanced. And just a few previous case studies that we ourselves have worked on and that might be of interest to you following up finally with a bit of a Q&A at the end here. So it's a program that we're going to be running. So we'll jump into it. The 407 bladder pump is a 316 stainless steel pump which comes in a couple of sizes. There's the more common 1.66 inch diameter and that's for most two inch bore applications that we see. With our clients there's also the more narrow one inch pump which just gives you a bit more flexibility. I'll talk more extensively about the point shortly in the maximum operation depth. But the bladder pump has a maximum lift of 150 meters below ground level and that's within both of the diameter ranges there. So the bladders are available in more common low density polyurethane. Sort of in the more portable systems and changing them from bore to bore that's commonly what we see. There's also Teflon bladders which are much more durable and more so for the dedicated applications when wanting to dedicate these pumps in the bore. Having the bladder in these pumps obviously means that we're avoiding as best as possible the contact of our air supply or gas supply with the sampling water which is good for our sort of VOC monitoring. So if this is a requirement and sort of tossing up on pumping options then the bladder pump would probably be best suited for this provided again you don't have the depth limitations as said above. When I say less fine tuning there and the operation what I mean by that is when talking about our drive and vent times meaning the time where we apply our air source being the drive and the time that we let the bore actually recover being the vent. It's a bit more forgiving unlock the double valve pump which we'll cover in a minute. But essentially if I had my little cursor here the drive time we're applying our air through the drive line and compressing that bladder and our vent time is allowing that bladder to re-expand and have new water come in which allows us to repeat the cycle and send that back up the line. So we see the maximum flow rates there of about 1.5 litres per minute you can expect that the closer you reach to that maximum deployment depth you may be struggling to reach this amount. Most commonly the bladder pumps aren't typically used for purging purposes so there isn't too much of a worry on those maximum flow rate numbers. This more so comes in the play a bit more of the double valve which we'll discuss. There is the capability of the drop tube assembly to put onto these 407 pumps. So this moves the screen intake of the pump to deeper depths with some tubing in between so some 3.8 inch tubing whilst keeping the pump at a level that is still capable for your equipment at the surface. So what we're doing is we're taking this lower section here of the pump screen intake down further with some 3.8 inch tubing but we're still calculating our psi and our drive and our vent times based on the where the bladder is situated still within the bore. So hydrostatic pressure is going to lift that water from wherever you've sat that drop tube assembly and pump intake. As an example if I'm setting my pump at 50 metres and putting my drop tube intake at 200 I'd still be calculating my pressure from 50 metres but I'll be drawing water from that deeper depth. With both the 407 and the 408 we have the ability and have done so quite a lot in dedicating these pumps to individual bores. So why would you maybe want to do this? Well we know that having dedicated pumps provides us with some of the best sort of representative aqua for data. Obviously we're going to get less mixing of column water due to the fact we're reducing that installation amount to and fro that particular bore. We'll get quicker sampling rounds if the pumps you know if we dedicate these pumps in the first round you know and you have maybe slightly deeper applications which take a bit longer to install these well if they're already there and they're dedicated you can save a lot of man hours coming back and having to sample these maybe quarterly or biannually that type of thing. So the dedication is capable again with the 407 and both the 408. So with the 408 available in some different couple of different sizes there's just the 1.66 inch this is again the most common but there's also the much narrower 5.8 inch double valve pump and also the micro double valve pump for CMT so multi-channel tubing that sort of honeycomb tube. We'll talk a bit more about the micro double valve pump when we do our multi-level webinar so we can touch more on the inner workings of that particular pump. The maximum operation limit and this is probably the main differential between your 407 and your 408 is that if we have we're actually calculating our pressure range is not based on the pump intake but actually on our standing water level. So if the standing water level is less than 150 meters theoretically we can put this pump anywhere. So as an example the sort of maximum depth that we've sampled from is around 1200 meter mark below so you know quite deep you just have more flexibility there. The pump doesn't contain any bladders so when I talked before about the 407 bladder pump having less fine tuning with the 408 you might have more flexibility of having an option for quite a low flow application so maybe less than 100 mil per minute all the way up to some sort of flow rates in the 3.5 litre per minute ranges. But again we require a bit more fine tuning that are required in terms of our drive and vent times if we want to limit the contact of our air supply with our sample water. So what we're doing is that we're actually applying our drive gas onto the driveline that's the water has come back up to static water level. So if we want to avoid having that contact with our sample water down here this just needs to be a bit more fine tuning our drive and vent which in the next slide I'll just discuss how to work around that. Again there's no need for the drop tube assembly with these because we calculated understanding water level as I said and there's also the ability to dedicate these double valve pumps. So what are the differences? So a bit of a cross side by side comparison of these two pumps aside from the pump materials both being 316 stainless you have a couple of different diameters which I mentioned earlier that just gives us I guess the point being that there's flexibility there to potentially have an option no matter what diameter your bores may be there might be a narrow enough pump to utilize with any sort of bore diameter in that instance. So there's just a range of different sizes there that we can suggest. Calculating our PSI, calculating our drive and calculating our vent the three points that I'll speak about which is the main point of contention I suppose and the questions that I get asked the most. So what we've tried to provide here is just a quick way of being able to calculate your PSI ranges calculate your drive times and calculate your vents quite quickly. So as I said previously in the 407 blader pump we're calculating our PSI based on the pump intake so where the pump is sitting basically. Now if the drop tube is in there you've actually put the pump intake down a bit lower you're just basically calculating where the blader actually is in the pump. So this calculation here which is the times 3.3 divided by 2.3 plus 10 is directly coming from silenced themselves where they say that one PSI can lift a 2.3 foot column of water. So what we're doing is we're taking wherever our pump is sitting in meters and we're times it by 3.3 to get a foot conversion dividing it by that 2.3 foot and then the plus 10 there is what we call line loss. So allowance for that so you'll get some bleeding through your tubing and that sort of thing so it's just good to put a number there that can compensate for that that line loss bleed. Calculating the PSI for the double valve pump the equation is exactly the same but instead from of the pump intake again we're actually calculating from the standing water level. So you're going to get more flexibility in being able to sample from deeper depths but maybe require less hardware or less robust hardware at the top to try and meet massive PSI requirements so that just gives you a bit more flexibility there. So calculating a drive there's a couple of easy ways to to do this in the 407 blader pump. The quickest way to calculate a drive is that if we've set our pump down where we need it to be we can actually time application of our drive and we can submerge our sample line which will be our 3.8 inch line tubing in a just a bucket of water and so if we apply our drive gas and we see bubbles coming from that sample line what that's telling me is that our drive gas is compressing our bladder as we want it to be and it's forcing water up that sample line and actually expelling the air within that sample line as well which is the bubbles. So if you've submerged your sample line just in the bucket of water and you're applying drive gas and you see that there's bubbles coming out of that line that tells you that water is on its way basically and when those stop that when the bubbles stop in that line that also tells me that the bladder is being compressed to its maximum amount so no more water is going to come out as I'm applying my drive gas. So we say about 80% of that time is a good time to encapsulate sort of emptying the bladder as much as possible once we've applied our drive gas and just allowing when we're calculating our vent to have that to be about two or three times that drive amount as a minimum. Now that's going to be based on whether it's the 4.7 or the 4.8 it's going to be based on your recovery of your bore. So just calculating your vent quickly if you can do a two or three times multiplier on that drive time it's a good start point but always each bore is unique as we know. Just make sure you're not drawing down within your guidelines and you can bump up your vent to allow a bit more recovery on that. So with the 4.08 double valve pump if we move to the calculation of the drive there a little bit trickier that our purge sample line of all the water once we've actually sat pump in place at the start and then what we can do is we can apply our drive gas and we'll see water being expelled from the sample line and eventually the air will be expelled. Now that tells me that the drive gas has made a full loop from the tubing where the air is being applied all the way down through the pump and back up the sample line to complete a full circle. So we say 40% of that time that we've timed whilst we've applied our drive gas is a good start point in the double valve pump. Why? I'll just go back one here if you can see my cursor there. Why we say 40% well if we assume that the drive line the pump and the sample line is 100% if we've applied our drive gas and we put it all the way through this tubing it's gone down through the pump and back up the sample line to be expelled at the surface that's completed a full loop. So 50% would be if we sort of cut this pump down the middle that's 50% of our time being applied in the drive line and obviously a little bit less than that will allow us to not have the air whilst we when we start sampling to be in contact with your sample line with your sample water in here and just allow that recovery. So each time we vent the drive water will come back up to standing water level which is here. So all we're doing is applying gas getting down just before the pump allowing it to vent and coming back up the standing water level and repeating that process. So if that process is done correctly we should be avoiding our air contact with our sample water. So again our maximum depth ranges are also included there on this table 150 meters below ground level with the bladder pump and again less than 150 meters just get that if you just keep those point in your mind that if you have a standing water less than 150 meters then the double valve pump is probably where you want to go if you want to sample deeper than 150. Just a quick touch point as well is that the drive and sample lines on the tubing out of the box these pumps will have the air and sample line swapped around. So on the 407 bladder pump you have the quarter inch tubing being the air and the three eighth inch being the sample. On the 408 double valve pump you have the three eighth being the air and the quarter inch being the sample. Now I've put that this can be changed here because nine times out of ten we do change that. If we go to add double valve pumps into our rental fleet for example we simply swap those connections back around to have our preferences having the quarter inch air three eighth sample it doesn't affect anything internally in the pump it just allows us to have less psi requirements when we're calculating that sort of stuff for deeper applications due to reducing the diameter of that drive tubing from three eighths to a quarter we're just allowing ourselves to have more allowance with our gear. So I always suggest to switch them around but just to be aware of that. So the solance controller and air supply options as I said previously at the start we might do another webinar on this because it's quite a bit of extensive things that we can delve into on this but just quickly I'll talk about the 464 controller and the 12 volt compressor from the solance range. The solance 464 controller comes in a 125 psi rating and a 250 psi rating. There's a manual drive button on the controller which eliminates electronics and I'll just talk a bit about that a bit more when we get to the troubleshooting. There's also the option to store up to 99 saved channel gloves in the actual controller itself. So for example if you've dedicated a suite of bores and you've got 30 pumps in there and you've done your first round of sampling you've worked out with your calculations your drive and vent times are all sitting fine and the bores recovering nice you're able to save those settings that you previously had in your controller named under the particular bore so if you're going back and doing quarterly analysis or biannual analysis then you can just again reduce those times of having to calculate those things and start to reduce your manhours that way so that's a good little feature with that control unit. The solance 12 volt compressor we say is ideal for uses in bores of sort of less than 30 meters. We say that because what we know about the compressors is that they're trying to maintain a pressure rating within the chamber so the solance 12 volt compressor does have 125 psi maximum output but if we have a large sweep of sort of deeper bores it's the compressor or any compressor will be trying to maintain that pressure within the chamber constantly. If we're applying high psi air to a lot of our bores and utilising the same compressor it'll be running for quite a long time to try and maintain that pressure within the compressor and can run the risk of burning it so blowing a fuse or something like that. So we sort of say it's really ideal for the shallower applications just to try and limit that. You can utilise them for maybe a couple of deeper bores if you wanted to but just as a rule of thumb better for the shallower applications because again you can run the risk of blowing that fuse or burning them out and so there is a lot of technical guidance on changing fuses and troubleshooting on the on the compressor if that was to happen both on our HydroChair website and the Solmots website also. The main ones we start to move to is the compressed gas for anything sort of deeper so our CO2 or Nitrogen is typically used as our inert gases there. The preference for one or the other can depend on what you may be sampling for. Sometimes people typically like to use nitrogen as it's typically a more if you will inert gas and you can actually achieve a bit higher psi ratings if you're wanting to do deeper applications. Mostly we utilise CO2 at HydroTerror but again you have the flexibility there of being able to choose. So what are some troubleshooting tips for these? If you guys are familiar with the Solmots controller I try and get this point across in that there's some preset low flow settings suggested on the controller face in terms of recommended low flow sampling right? I always ask that you don't use those preset settings for a couple of obvious reasons. Example being that the low flow setting that's a preset on that Solmots controller is set to 50 seconds drive and 25 seconds vent. If you remember previously what I said you want to try and have your vent to be two or three times your drive not the other way around because we're trying to allow that board to recover and be able to take as best as we can representative from that particular aquifer. So I just suggest that those calculations that we've talked about before to utilise them and to not utilise the preset settings on the Solmots controller. In our rental fleet we've taken steps to provide people with a bit of a cheat sheet on those calculations and refer them to that from the Solmots controller. If that's something that might be of interest to people we're happy to send through that cheat sheet to you all. Don't forget to use your manual drive button so that's helped me personally with a couple of bores to get that final couple of samples but that does is that that silver button on top of the Solmots controller will allow you to bypass any electronics or anything like that. So if I press that manual drive button down that's actually applying a drive cycle. If I release it that's that's a vent so I can sit there with my watch or my phone and if I've maybe forgot to pack the batteries I can still utilise the controller and just bypass any electronics with that manual drive button so that's a handy thing that's helped me in my time. Don't be afraid to slightly increase your PSI so if you're not seeing water coming up those calculations that we've suggested previously aren't you know set in stone they're just guidelines to initiate so if you're again utilising that that method of submerging your sample line at a bucket of water and you're still and you're seeing bubbles maybe not so many it suggests that you're probably you know water's coming up but you might just not have enough PSI to get it up there so don't be afraid to sort of bump it up or reduce it from your calculations and just be sure to adjust your PSI on the control unit first not increasing the gas bottle so sometimes people will try and get that extra five or ten PSI through increasing the gas bottle regulator quite extensively and then might be getting nearly there and then start to adjust on the controller that can cause you know once you open up that controller if you've if you've opened up extensively the regulator on the gas bottle that can cause that to over pressurize and potentially blow a soul in it or something like that so just be sure to adjust as best as as most as you can firstly on the control unit and goes without saying but good solid connection on all your tubing gas fittings push fittings you just want to make sure that all of those are nice and tight before you do it instead of having to pull a pump back up again that little thread in between the your twin bonded tubing is good to just remove that before you put it into your connections and just things like that so wherever you utilize some previous projects that we've been done which we'll finish on and then we'll just move to the Q&A so Jacobs we partnered with Jacobs and and dealt with a few years back to dedicate some of the 408 double valve pumps there was a number of around 30 bores which needed to obtain some samples from up to 1200 meters deep this is quite a unique project in that it provided a lot of challenges which needed to be overcome in order to achieve this as you can probably imagine so we utilized the we did extensive research on to what would be the best pump for the job and we ended up utilizing the 408 double valve which we found was able to obtain the best samples at these particular depths the issues that come about from this we encountered some buoyancy issues at around the 300 meter mark we wanted to install this so if you can see on the image there we had to actually install a bit of a custom milled spike at the bottom which is literally just a solid piece of milled stainless steel that would just allow enough weight to counteract the buoyancy of the long sample tube and the long drive line tubing to stop the pump from coming back up on itself we also altered the tubing from the more common ldpe to i think like hdpe because we were seeing pressure influencing the compression of the more thinly walled ldpe at these greater depths there was also the issue of dissolved gas samples which were required as they come up to surface and were depressurizing from that that type of depth so we had to basically take a set volume of sample into a water gas chamber and sparge it with nitrogen gas to essentially strip the sample of dissolved gases and store those dissolved gases in the sumo caster and analyze them at the lab so that was a very challenging process and the image of that actual contraption is there so that was a difficult process that we had to overcome for that particular project but it was a very successful one at the end of it and learnt quite a lot in terms of deeper application pumps and able to there's a full case study of that on the actual silence website and on our website as well if you wanted to delve more deeply into that the snowy hydro projects we dedicated and have dedicated quite a lot of the 408 double bell pumps around numerous locations that's again having ongoing expansions so the 408 double bell is the pump of choice for those guys when they're dedicating all of their sampling bores and monitoring bores and so that's seen a lot of success there and was some great countryside to be installing those pumps at the applications again were sort of in that deeper range of around 200 and 300 meters and I'm still seeing more of that more of those type of depths as we move on through it the minjagol project there was some bladder pump dedication as well so you can dedicate those the bladder pumps as well as I spoke about the dedication of those you know why we move to having a bladder pump with a drop tube versus the double valve again this might be some considerations with your VOC sampling so there might be a choice over one of the other we found that actually getting a sample up and getting an amount of sample is a bit easier for example having a double valve pump at 300 meters versus having a bladder pump at 100 meters and putting a drop tube assembly down to there so we typically just save for the much deeper stuff to utilize the double valve and there's a large network of dedicated double valves in the Heathgate resources as well so we've utilized quite a few projects where there's a lot of these pumps around and continue to work closely with all these clients so I guess that brings us to the end there so thank you very much for watching we'll take this time now to answer any questions that you guys might have and I'll just bring up some of this I know we just had a bit of technical issues with the screen sharing so you guys will be able to see these questions but I will still read them out anyway so Jasper have you got any data of PFAS contamination by the pump through seals valves etc of the samples is there a difference between the two different pumps in this aspect recently we've had some inquiries into whether these pumps can be utilized for PFAS sampling there is ongoing talks with Solanced and we are coming up with some solutions to have these pumps be utilized for some potential PFAS sampling there is some declarations from Solanced around the PFAS there's no PFAS contamination in a lot of their components within the pump and we take the steps of also changing the the common Teflon check balls to stainless steel ones we're doing some more testing on that particular setup but we are coming to something along with the declarations and also changing a few things from Teflon obviously to stainless steel to hopefully have a very robust sort of capability to suggest these pumps for further PFAS applications. If I'm a fast recovering bore is it still not recommended to use a vent lower than your drive yeah if you have a very fast recovering bore Jasper that that might be okay as I said you can have you can have a reduced vent time again it's really just dependent on your bore if your bore is recovering immensely then by all means you know if you can increase if you can have a drive time that's more than your vent then then you're in a really great spot so it's just really determining on your recovery of your bore so just don't take those what I'm saying is just don't take the vent to be less than your drive nine times out of ten will probably be the case so don't try and implement that with a lot of the bores if you have really fast ones then certainly you can you can do that so Joanne cheat sheet would be excellent thanks that's no worries Joanne we'll make a note there to send that through to you and that's no problem at all does the 407 pump need to sit below the standing water level or only the drop tube Andrew the 407 pump will need to sit below the the standing water level because we're relying on our hydrostatic pressure to move the water up from the pump intake wherever you want to sit that up into that bladder so yes we will need to sit that you actually need to sit the pump below the standing water level are there any other pumps that would be recommended for PFAS just with the point of contention at the moment and quite a tricky process I've come into contact with suppliers that maybe suggest that they can have some pumps recommended for PFAS I just take the caution there in that you want to make sure that as we know a tricky beast of PFAS being that you analyze each and every component of the pump before you make that choice and if you have declarations from your supplier that say that there's no known contaminant of PFAS in their inner workings of the pump that's probably your best poise people some suppliers out there like to claim they have a PFAS-free solution but they might not have checked that you know the internal O-rings it might be Teflon or something like that so it's just important to make sure you have declarations from all of that if I do find something that's a fully PFAS-free recommended pump I'll be sure to let you know again as I said I'm working through that with with Solance at the moment and then we have probably the best poise place where if we change those Teflon balls with stainless steel and we have declarations from Solance as a general one saying that they are not known to have PFAS contamination and their Veton O-rings and that sort of thing as a component within the pump are not known to have PFAS contamination and can provide those declarations to you that's probably one of the best poise so far solutions that I've come across so happy to do that for you just if you require thanks Luke what are the pumps rated for PSI the pumps rated for the PSI it's not a huge there's no real rating on PSI for the particular pump it's more so you have problems with the controllers I don't think there's going to be an instance where you damage any internal components with high PSI ratings within the pump or that certainly I haven't come across that but if there's something else I can derive from that from Solance then I'll be sure to let you know but I'll just take that that one down Joseph but for my knowledge it's more so going to be your components at the surface rather than the actual internal working to the pump rated for your PSI what you can find though is if you have really high PSI ratings in your in other pumps with your bladders that has a potential to blow off the way that the Solance bladders actually install gives yourself a great allowance to avoid that happening that's probably the only instance I've seen where any internal components are affected by higher PSI ratings it's a possible to provide these slides to us and share with colleagues who could not attend yeah certainly Patrick I'll be able to get some slides to you for sure on that so I'll just make a note of that as well Pat and be sure to let you know with some of those slides so that might do us for the questions I don't see any more coming in so once again thank you all for attending this I hope you might have taken something away from it all as I said in the coming weeks and months we'll be putting out these other short presentations and that sort of thing so just be on the lookout for those if you have a little bit of time in your lunch break and appreciate you guys taking the time to listen to us so from Hydra Terra and from myself thank you all for attending and to those people that have put the questions and I've asked for some more documentation we'll get that through to you so thank you all and enjoy