Underground Storage Tank Maintenance

 

Underground Storage Tank Maintenance

I am using biodiesel (B5) and I am noticing an increase in bacterial growth.

I would like to know what is the best practice for maintaining UST and equipment.

Is periodic tank cleaning necessary?
Is the use of fuel additives recommended? if so, how often?

Anonymous (not verified)
Anonymous's picture

You must clean your tanks at a minimum of once of year if you turn your fuel inventory over fairly quickly. If you don't turn over your inventory quickly I highly recommend doing it twice a year. I also add a additive to my bio-diesel to ensure my lubricity factor stays high and it also seems to eliminate some of the problems we were having with the fuel. The additive is called Clean Boost and I have been using this since I took over Clark County 5 1/2 years ago when they were experincing extensive problems with the bio-diesel. My fuel supplier adds this to every shipment I receive so the concentration stays the same.

Anonymous (not verified)
Anonymous's picture

 

Thought I posted something but don't see it so must have hit the wrong button. If this duplicates, sorry. The National Biodiesel Board is a great source of information. I suggest using their site and/or talking to them. Granted, they are biased towards biodiesel -- but they are also experts and because they want using it to be a positive experience they try hard to help users get it right; from the start. My organization used/uses Biodiesel some (B-20) and there were 2 things we were advised about right away. First, biodiesel cleans -- so make sure tanks are cleaned before the first load is delivered. Similarly, expect to go through extra filters because it will clean truck tanks and lines and end up in the filter. Second "issue" had to do with using it in cold weather -- and to expect to need to use additives (same ones as diesel, just at slightly warmer temps) to prevent Jelling at lower temps. At vehicle conferences, I heard about the bacteria problem -- but did not hear that there should be a need to clean tanks "overly" frequently. Did hear that using a bacteriacide would be necessary. Also heard that diesel alone can experience bacteria problems, so your fuel supplier might have a play in this. And/or, from what I read at Biodiesl Board site, a little water might be getting into tank -- which would aggravate bacteria problem. Here is a quote from one of the Board's publications:

3.6.2 Microbial Contamination
Biocides are recommended for conventional and biodiesel fuels wherever biological growth in the fuel has been
a problem. If biological contamination occurs, water contamination should be suspected and will need to be
controlled because the aerobic fungus, bacteria, and yeast HC-utilizing microorganisms usually grow at the fuel-
water interface. Anaerobic colonies, which usually reduce sulfur, can be active in sediments on tank surfaces
and cause corrosion. Because the biocides work in the water phase, products that are used with diesel fuels work
equally well with biodiesel."

Anonymous (not verified)
Anonymous's picture

I am not and expert with diesel fuel but our fuel supplier puts on a seminar every year and they have a presentation on tank vent filters for dust and dirt and also to remove moisture from the intake air to the tanks. Just FYI.

Anonymous (not verified)
Anonymous's picture

 

http://store.avlube.com/atctonmodd2.html

A link to said filter.

Anonymous (not verified)
Anonymous's picture

For my area in MN/DOT we use an additive from MEG Corp. for our bulk underground tank deisel. This allow us to run #2 all winter in our trucks. If you are getting bacteria there a very good chance your tank has water in it. A tank cleaning annually is a good idea. We also run 20 micron dispensor filter at our pumps.