Pursuant to Section 5 of the NFPA Regulations Governing Committee Projects, the National Fire Protection Association has issued the following Tentative Interim Amendment to NFPA 269, Standard Test Method for Developing Toxic Potency Data for Use in Fire Hazard Modeling, 2012 edition. The TIA was processed by the Technical Committee on Fire Tests, and was issued by the Standards Council on August 9, 2012, with an effective date of August 29, 2012.
A Tentative Interim Amendment is tentative because it has not been processed through the entire standards-making procedures. It is interim because it is effective only between editions of the standard. A TIA automatically becomes a proposal of the proponent for the next edition of the standard; as such, it then is subject to all of the procedures of the standards-making process.
1. Revise Section 12.5 to read as follows:
12.5 Report. The report shall contain the following information for the tests using the exposure of animals:
(1) Strain of rat and identity of supplier
(2) Weight of each animal when received, prior to test, and of surviving animals at 7 and 14 days postexposure
(3) Number of animals that die during the test, and number of animals that die up to 14 days posttest
(4) Blood carboxyhemoglobin saturation values for animals that die during the test
(5) Animal observations (e.g., unusual behavior during test); immediate posttest observations of animals, such as
tremors, convulsions, difficulty in breathing, and severe eye irritation
(6) The LC50 obtained by the predictive equation from Section 12.4.1
(7) The number of rats that died in each of the two check tests in Section 10.1.2
(8) Whether the animal check tests confirm or do not confirm the predicted LC50 value, as described in Section 10.1.2.