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Jerry Daub: <br />We're looking at casing collar locator logging, surface elevation monuments, possibly video <br />logging, gamma ray logging, cement bond, and also the original casing tally. When you <br />install casing, you can put a short piece in the casing string, maybe in several locations, so <br />you're better able to confirm that. Instead of a 20 -ft casing, you may want to put a 10 or 8 <br />footer in there occasionally that you'll be able to identify. So, there are multiple means of <br />monitoring for subsidence. <br />One thing to consider, again in comparison to what's going on at White River, they are <br />operating immediately below and at the dissolution surface. And the rock immediately above <br />the dissolution surface is rubblized. The rock quality of that material is very, very low. <br />Compared to AmerAlia's plan— you'll notice in the hydrostratigraphic columns —from the <br />dissolution surface down which is approximately 1,700 ft (1,695) down to 2,000 ft. That's <br />300 ft of Saline Zone rock material. That's very competent, dry rock. The RQD of that rock <br />is virtually 100 and that's a very good barrier between the tops of the cavities and the <br />dissolution surface where the lower -most groundwater is located. <br />Dan Jackson: <br />One last question on the gamma ray stuff, then. The tests that you were talking about, the <br />CBLs, etc., are upon completion. Will you follow that up for some period into the actual <br />mining operations down the road, so that if there was any kind of problem you would <br />recognize that? In other words, you would do them when you first installed them, then would <br />you do it later on? <br />Roger Day: <br />Basically, any opportunity we had, like during a work over, if it had been a significant <br />amount of time since the last gamma ray, we would look at it again. If we're in the well <br />working and it's been more than a certain amount of reasonable time, I think it's appropriate. <br />Then I think there needs to be some maximum recovery interval where, in a specific period <br />of time (say over the next year), we need to make the opportunity to get that data. <br />Ned Banta: <br />Going back to your map there, can you point out where the White River operation is now? <br />Roger Day: <br />That's dead center of Section 26, right here. The initial cavity extended above here. We <br />were' able to make longer and longer drillings down horizontal reaches. Eventually, we were <br />actually building pads off the Sodium Mineral Lease and then drilling back towards the plant. <br />Ned Banta: <br />You've pointed out how big their operation is so presumably they're injecting large amounts <br />of water affecting a pretty large area with whatever they're doing. What I'm wondering <br />about is, if you have considered for your own protection putting a monitoring system in <br />upgradient of your operation... <br />14 <br />