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Allen Sorenson: <br />You're talking about a tool that doesn't go down in the hole. <br />Ned Banta: <br />Is the piezometer with pressure transducer and temperature compensated? <br />Roger Day: <br />Yes. It may not be the best measurement. It's not intended to measure the solution <br />temperature, but it would give you a temperature of that range. <br />Roger Day: <br />This is on, at or near water level system with just 410 ft of wire to just below the water level. <br />That really isn't going to measure...there's no wire to the dissolution surface. It would <br />further complicate the completion of this in getting these instruments down. We'll have two <br />nylon tubes for the water sampling, a stainless cable to the sampler, plus the piezometer wire. <br />I've already had real messes with the tubes -wire- cable. It's difficult. <br />Allen Sorenson: <br />Well, the idea behind that temperature monitoring is having an early indication of any leak <br />from the cavity into the dissolution surface. Your proposal is 300F injection fluid into the <br />cavity, so if that were to leak you'd get it on the monitor. <br />Roger Day: <br />If it were to leak through, the leak needs so much volume to carry temperature to the monitor <br />wells I think our tanks would go dry in a hurry. If there's a leak that we haven't been able to <br />detect with our flow meters and tank volume monitoring, even if it's going though a fracture <br />to add speed it probably won't carry enough BTUs to heat the monitor well area. <br />Allen Sorenson: <br />You think you'll lose the heat and you won't be able to detect it? <br />Roger Day: <br />Yes, if you move even a gallon a minute through the ground through some fracture system at <br />a ,gallon a minute, boy, it's the temperature coming out the other end that is not going to <br />change. Then you have to mixing in the aquifer. I don't think the monitor well area <br />temperature would be very sensitive to these fluids. <br />Allen Sorenson: <br />That being the case, I guess what I'd like to see in your groundwater protection proposal and <br />permit is a real thorough explanation of what you were talking about —the tank volumes and <br />the pressure monitoring and how you'll be able to detect changes. <br />Roger Day: <br />That is. In fact, I think it's mentioned in the UIC permit and I believe it's in the program. <br />We monitor temperatures, pressures and flows in and out of the wells at the well head. <br />We've got similar things back in the plant and we also have (what turned out to be pretty <br />darn telling) is the tank inventory. We've got all the tank levels in analysis. All the tanks are <br />gaining or losing. <br />26 <br />