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To: Robert Bolton who wrote (4709)	3/31/1999 4:16:00 PM
From: Sprintcar	Read Replies (3) \| Respond to of 8189

From the RB thread to Charlie This message is in response to Charlie on the SI board. I don't have a membership to SI, so I am hoping someone can relay this to him. The question Charlie had was in relation to underground storage tanks in the oil industry. I spoke with Myles today regarding water mains, and he said that the device is effective in determining leaks at depths of no more than 7 feet. Unless those are shallow tanks, I don't think that storage tanks qualify. The reason it is not effective is because the dirt causes a dissemination of the sound when it gets down to far below the surface. I hope someone can relay this to Charlie.

To: Robert Bolton who wrote (4709)	3/31/1999 4:25:00 PM
From: Bill on the Hill	Respond to of 8189

In the mountains of Colorado our pipes are from 18" (natural gas) to 6' (water) deep. I would expect that this is as deep as they get normally anywhere in the country. I have installed water lines for ski areas up to 11,000 feet elevation and these units for snowmaking systems use a tremendous pressure. Typically over 200 psi water pressure. They are usually installed at about 4' by using a D-9 ripper down the mountain and detection of leak would be critical in these applications. We have gas pipelines that leave our area for production plants and they need detection also. These gas lines are using a pumping pressure of 700 psi minimum. Again, leak detection critical. Once again these devices have unlimited potential. The future is bright. So bright I gotta wear shades. Holding till the cows come home. Relax, take a load off and forget about it.