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<blockquote data-quote="Allen" data-source="post: 357288" data-attributes="member: 389">Yes, diesel that is stored for a long time, such as backup generators, should be treated with a biocide to prevent bacterial growth in the tank.&nbsp; Seems kind of odd when you first think about it, but certain bacteria thrive on diesel fuel and they are known to degrade the quality of the fuel and produce a biological film on the filters which can plug the filters.&nbsp; I would suggest implementing some kind of plan that &quot;tests&quot; your backup plan at least once a year that uses 10-25%(?) of your fuel in storage.&nbsp; First of all, not knowing how long your 12,000 gallon tank will run your operation, but perhaps you only really need to have 1,000 gallons in the tank to last 24-48 hrs, which provides you with ample time to call in for a refill as needed.&nbsp; That way you aren't sitting on a pile of fuel of marginal quality going forward.What I would do here is change the filters (many long-term storage tanks have filters in line on the exit), burn down your fuel level to something in the range of what you would need for a 48 hour emergency use, and then try to maintain it at that level going forward with regular tests of the system.</blockquote>

[QUOTE="Allen, post: 357288, member: 389"] Yes, diesel that is stored for a long time, such as backup generators, should be treated with a biocide to prevent bacterial growth in the tank. Seems kind of odd when you first think about it, but certain bacteria thrive on diesel fuel and they are known to degrade the quality of the fuel and produce a biological film on the filters which can plug the filters. I would suggest implementing some kind of plan that "tests" your backup plan at least once a year that uses 10-25%(?) of your fuel in storage. First of all, not knowing how long your 12,000 gallon tank will run your operation, but perhaps you only really need to have 1,000 gallons in the tank to last 24-48 hrs, which provides you with ample time to call in for a refill as needed. That way you aren't sitting on a pile of fuel of marginal quality going forward. What I would do here is change the filters (many long-term storage tanks have filters in line on the exit), burn down your fuel level to something in the range of what you would need for a 48 hour emergency use, and then try to maintain it at that level going forward with regular tests of the system. [/QUOTE]

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