Okla. Admin. Code § tit. 165, ch. 26, app J
Substance Classification | If groundwater or bedrock is less than 10 feet from grade or AST is within 100 feet of Class II water* | If groundwater or bedrock is greater than 10 feet from grade and AST is not within 100 feet of Class II water |
Type A | At least three feet (horizontal thickness) of soil with a minimum permeability of 1x10-5 cm/sec | At least three feet (horizontal thickness) of soil with a minimum permeability of 1x10-4cm/sec |
Type B | At least three feet (horizontal thickness) of soil with a minimum permeability of 1X10-4 cm/sec | At least three feet (horizontal thickness) of soil with a minimum permeability of 1x10-3 cm/sec |
Type C | At least three feet (horizontal thickness) of soil with a minimum permeability of 1x10-3 cm/sec | No minimum permeability standard. |
(A) Type A substances include gasoline, diesel, aviation fuel, kerosene, antifreeze, motor oil and motor fuel.
(B) Type B substances include jet fuel, fuel oil types 1 through 4, virgin lube oil, used oils and mixtures or blends of these substances with Type C substances.
(C) Type C substances include fuel oil types 5 and 6 and other regulated Substances.
*Class II (General Use Groundwater): These are groundwaters capable of being used as a drinking water supply with no special treatment or with conventional treatment methods, which have the potential to be used for other beneficial uses and which have a mean concentration of Total Dissolved Solids of less than 3,000 milligrams per liter.
Okla. Admin. Code tit. 165, ch. 26, app J