- (a) In each case where the recognized facility doubts the ability of a material to withstand exposure to the substances listed in paragraphs (b) and (c) of this section a sample of the material must be tested.
(b) A sample referred to in paragraph (a) of this section must be partially submerged in each of the following substances for 100 hours at an ambient temperature of 22 °C.
- (1) Sewage.
- (2) Any disinfectant that is required in the operation of the device.
- (3) Any chemical compound in solid, liquid or gaseous form, used, emitted or produced in the operation of the device.
- (4) Fresh or salt (3.5 percent Sodium Chloride) flush water.
- (5) Toilet bowl cleaners.
- (6) Engine Oil (SAE/30).
- (7) Ethylene Glycol.
- (8) Detergents (household and bilge cleaning type).
(c) A sample of the material must be doused 20 times, with a 1 hour drying period between dousings, in each of the following substances:
- (1) Gasoline.
- (2) Diesel fuel.
- (3) Mineral spirits.
- (4) Turpentine.
- (5) Methyl alcohol.