Laserfiche WebLink
• • <br />up and create a piston and bring out a section of water. You repeat until you've purged it out <br />and you don't have anything in the well long term. That, and the nitrogen lift pump are the <br />two techniques I like to use. <br />Paul von Guerard: <br />We probably don't want to spend a lot of time on this, but American Soda's using the <br />micropurge. These guys are using a different technique similar to what White River's doing. <br />Potentially, you could be getting very different results because of the way the samples are <br />taken. I don't know if you will, but there's potential that you might. <br />Paul von Guerard: <br />We discussed the micropurge process in our March meeting. Ned and I were talking about it <br />today before we came over and came up with a question in terms of knowing whether you're <br />getting formation water or the water from the bottom of the casing when you do a <br />micropurge. In any event, apart from that comment, if you're going to use different sampling <br />techniques you might potentially get different results. <br />Roger Day: <br />I would feel abused in a way. My job is to protect the aquifers. We've got things that we <br />have to do. Being consistent with the neighbor 4 miles over is not.. There may be slight <br />differences in the sampling techniques and the results. Theirs can be a credible system. We <br />can have a credible system. The type of shifts in the ions, that could happen by different <br />sampling techniques, won't really make that much difference in the overall. <br />Paul Osborne: <br />I was going to say that CA in Rio Blanco went to micropurge, too, and they did so because a) <br />they were getting better samples, and b) it was cheaper. <br />Roger Day: <br />Paul, does White River Nahcolite have a micropurge. <br />Paul Osborne: <br />No, I think it's the nitrogen lift. <br />Jerry Daub: <br />That micropurge, they're talking about a bladder pump, right? <br />Paul Osborne: <br />You could have. You put something down and basically withdraw it from the sample. <br />Roger Day: <br />That's what White River's doing. There's the pump down there with check balls in it. You <br />hook it up with a 2,000 -psi nitrogen bottle. You put the nitrogen down and the sample comes <br />up the opposite side. You take the pressure off, it refills and then you bring up the next one. <br />It's just different. <br />29 <br />