D.C. Mun. Regs. tit. 12, r. 12-E510

Current through Register Vol. 71, No. 49, December 6, 2024

Rule 12-E510 - HAZARDOUS EXHAUST SYSTEMS

Strike Section 510.5 of the International Mechanical Code in its entirety and insert a new Section 510.5 into the Mechanical Code in its place to read as follows:

510.5

Incompatible materials and common shafts. Incompatible materials, as defined in the International Fire Code, shall not be exhausted through the same hazardous exhaust system. Hazardous exhaust systems shall not share common shafts with other duct systems, except where such systems are hazardous exhaust systems originating in the same fire area.

Exception: The provisions of this section shall not apply to laboratory exhaust systems where all of the following conditions apply:

(No change to conditions 1 through 5)

6. Where the project includes radioisotope hoods, the approved permit documents contain a statement, sealed and signed by the registered design professional, specifying whether and which filtration or adsorption provisions are required, and the radioisotope hoods are equipped with filtration, carbon beds or both to the extent required by the registered design professional.

(No change to conditions 7 through 8.2)

D.C. Mun. Regs. tit. 12, r. 12-E510

Final Rulemaking published at 67 DCR 5679 (5/29/2020)