[Code of Federal Regulations]
[Title 24, Volume 1]
[Revised as of April 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 24CFR51.203]

[Page 384-385]
 
                 TITLE 24--HOUSING AND URBAN DEVELOPMENT
 
PART 51_ENVIRONMENTAL CRITERIA AND STANDARDS--Table of Contents
 
  Subpart C_Siting of HUD-Assisted Projects Near Hazardous Operations 
 Handling Conventional Fuels or Chemicals of an Explosive or Flammable 
                                 Nature
 
Sec. 51.203  Safety standards.

    The following standards shall be used in determining the acceptable 
separation distance of a proposed HUD-assisted project from a hazard:
    (a) Thermal Radiation Safety Standard. Projects shall be located so 
that:
    (1) The allowable thermal radiation flux level at the building shall 
not exceed 10,000 BTU/sq. ft. per hr.;
    (2) The allowable thermal radiation flux level for outdoor, 
unprotected facilities or areas of congregation shall not exceed 450 
BTU/sq. ft. per hour.
    (b) Blast Overpressure Safety Standard. Projects shall be located so 
that the maximum allowable blast overpressure at both buildings and 
outdoor, unprotected facilities or areas shall not exceed 0.5 psi.
    (c) If a hazardous substance constitutes both a thermal radiation 
and blast overpressure hazard, the ASD for each hazard shall be 
calculated, and

[[Page 385]]

the larger of the two ASDs shall be used to determine compliance with 
this subpart.
    (d) Background information on the standards and the logarithmic 
thermal radiation and blast overpressure charts that provide assistance 
in determining acceptable separation distances are contained in appendix 
II to this subpart C.

[49 FR 5103, Feb. 10, 1984, as amended at 61 FR 13334, Mar. 26, 1996]