[Code of Federal Regulations]
[Title 40, Volume 12]
[Revised as of July 1, 2002]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR68.30]

[Page 167]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
               CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY
 
PART 68--CHEMICAL ACCIDENT PREVENTION PROVISIONS--Table of Contents
 
                      Subpart B--Hazard Assessment
 
Sec. 68.30  Defining offsite impacts--population.

    (a) The owner or operator shall estimate in the RMP the population 
within a circle with its center at the point of the release and a radius 
determined by the distance to the endpoint defined in Sec. 68.22(a).
    (b) Population to be defined. Population shall include residential 
population. The presence of institutions (schools, hospitals, prisons), 
parks and recreational areas, and major commercial, office, and 
industrial buildings shall be noted in the RMP.
    (c) Data sources acceptable. The owner or operator may use the most 
recent Census data, or other updated information, to estimate the 
population potentially affected.
    (d) Level of accuracy. Population shall be estimated to two 
significant digits.