1. (1) Water in Retail Storage Tanks containing Gasoline-Alcohol Blends, Biodiesel, Biodiesel Blends, Ethanol Flex Fuel, Aviation Gas, and Aviation Turbine Fuel - no water phase greater than 6 millimeters (1/4 in) as determined by an appropriate detection paste, is allowed to accumulate in any tank utilized in the storage of gasoline-alcohol blend, biodiesel, biodiesel blends, ethanol-flex fuel, aviation gasoline, and aviation turbine fuel.
2. (2) Water in Retail Storage Tanks Containing Gasoline, Diesel, and Other Fuels - water shall not exceed 38 millimeters (1.5 in) in depth when measured with water indicating paste in any tank utilized in the storage of diesel, gasoline, gasoline-ether blends, fuel oils, and kerosene sold at retail.

3. (3) Dispenser Filters

   1. (a) All gasoline, gasoline-oxygenate blends, Ethanol Flex Fuel, and M85 methanol dispensers shall have a 10 micron or smaller nominal pore-sized filter. All dispensers must be compliant with this requirement by July 1, 2015.
   2. (b) All kerosene, diesel, biodiesel, and biodiesel blend dispensers shall have a 30 micron or smaller nominal pore-sized filter. All dispensers must be compliant with this requirement by July 1, 2015.
   3. (c) Fuel delivery of aviation turbine fuel and aviation gasoline into aircraft shall be filtered through a fuel filter/separator conforming to API 1581, “Specification and Qualification Procedures for Aviation Jet Fuel Filter/Separators” and ATA Specification 103 “Standard for Jet Fuel Quality Control at Airports”, as applicable.

   4. (d) All Aviation Gasoline dispensing systems shall be equipped as follows:

      1. 1. At inlets to storage and on fueller loading racks (and hydrant delivery lines), a 5 micron (nominal) or finer Microfilter meeting EI 1590, or a filter water separator.
      2. 2. Where receipts are by gravity into underground tankage, a 100 micron mesh strainer.

Authority: T.C.A. §§ 4-3-203 and 47-18-1309. Administrative History: Original rule filed April 6, 1990; effective May 21, 1990. Amendment filed August 31, 2000; effective December 29, 2000. Repeal and new rule filed September 4, 2014; effective December 3, 2014.