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Tool Talk Discussion Forum

OT - Underground Tank Corrosion Control

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ShepFL

09-15-2003 08:02:27




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Since completing my house I have asked questions of the gas co. and other friends about underground tank corrosion control. We had a 500 gallon "underground" LP tank installed with no sacrificial anodes. I am concerned about corrive effects of tank being in the ground.

I have seen fuel tanks installed that had to be both grounded and had anodes. Is this required by law? How do ya'll keep your bulk tanks and silos from corroding or is it even a concern?

Thanks in advance and any insight would be appreciated.

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Mark Kw

09-15-2003 13:04:16




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 Re: OT - Underground Tank Corrosion Control in reply to ShepFL, 09-15-2003 08:02:27  
I would not have buried myself, much easier and cheaper to keep up with the paint with it sitting on a stand. But, if you're pressed for room or appearance, you gotta do what you gotta do. Did you buy the tank and install it or did the gas company do it? If done by gas company, they assume 99.9% of the bruden for problems of any sort (in most states). If you installed it, contact whoever applied the coating and find out what they suggest (GET ANSWER IN WRITING). Go from there on things, best to leave the call up to the mfg of the tank/coating as to what's best.

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Nolan

09-15-2003 11:47:34




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 Re: OT - Underground Tank Corrosion Control in reply to ShepFL, 09-15-2003 08:02:27  
Like Scott, I cannot imagine burying a 500 gallon propane tank.

That said, there isn't a leakage issue to worry about particulary. When it springs a leak (and it will), the propane will gradually evaporate. That's good, as it eliminates the gor awful legal liabilities and expenses that can arise from a leaking underground fuel oil tank.

To get a better idea of your areas zoning requirements, contact your zoning board, as well as your state environmental agency. I personally suspect that latter will be rather interested in hearing that a company is advocating burying tanks.

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ScottT

09-15-2003 09:49:48




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 Re: OT - Underground Tank Corrosion Control in reply to ShepFL, 09-15-2003 08:02:27  
Is it a coated tank? Generally steel UST's need to be cathodically protected (sacrifical anodes or impressed current) or be coated.
Why did you get it buried?, UST's are more trouble than AST's, especially for such a small tank.

Scott



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ShepFL

09-15-2003 10:12:39




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 Re: Re: OT - Underground Tank Corrosion Control in reply to ScottT, 09-15-2003 09:49:48  
Yes the tank is coated. It is sitting on a bed of sand and anchored down in the hole. The whole assy is then covered with fill dirt to the grade level. Grade level is then topped off with topsoil.

Unit was buried in the ground based on gas co. recommendations. I have house plumbed for LP for appliances and also LP genset.



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paul

09-15-2003 12:01:34




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 Re: Re: Re: OT - Underground Tank Corrosion Contro in reply to ShepFL, 09-15-2003 10:12:39  
Never heard of such a thing here in Minnesota. Burrying gasoline tanks is pretty much outlawed up here unless you are commercial & the fees & inspections & required equipment is substantial, & never heard of anyone burrying an lp tank ever? My coop (fuel supplier, I don't have lp but they would be my supplier if I did) won't fill empty tanks without inspections & the owner present; are required to inspect tanks every so many years; and so on. These rules came about 2 years ago. Can't see how that could be done on your tank?

--->Paul

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Ben in KY

09-15-2003 12:48:43




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 Re: Re: Re: Re: OT - Underground Tank Corrosion Co in reply to paul, 09-15-2003 12:01:34  
I used to live in Tampa, FL. They do bury propane tanks down there.



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Pitch

09-15-2003 14:58:17




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 Re: Re: Re: Re: Re: OT - Underground Tank Corrosio in reply to Ben in KY, 09-15-2003 12:48:43  
My sister in law has a buried LP tank for appearances sake. Mine is above ground. The LP owns mine she had to buy hers. Major price difference. I did a bit of landscaping planted bushes and unless you are looking you don't even know its there.



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ShepFL

09-15-2003 18:48:25




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 Re: Re: Re: Re: Re: Re: OT - Underground Tank Corr in reply to Pitch, 09-15-2003 14:58:17  
Tank was buried for appearances sake - keeping peace in the family :) Most tanks used in my area are either 100 gal or 250 gal. and are just set on the ground.

We stepped up and got the 500 gal. size. Tank is relatively large. Gas company owns the tank and they do inspections every 2 yrs. Buried in an area that will not disrupt "view" during inspections. I was just wanting to extend the life cycle of the tank and was thinking of a sacraficial anode and tank being the cathode.

Maybe I made more of this than is needed. Just random thinking of ways to reduce any future maintenance requirements.

Gas co. said no need to do cathode/anode bit as tank is coated and garanteed for 20 yr. (Tecco). Tank is set according to local code.

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Ray,IN

09-15-2003 20:26:26




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 Re: Re: Re: Re: Re: Re: Re: OT - Underground Tank in reply to ShepFL, 09-15-2003 18:48:25  
A house across the road has had a buried LPG tank for about 30 years now with no problems.



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