[Code of Federal Regulations]
[Title 40, Volume 15]
[Revised as of July 1, 2005]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR65.42]

[Page 44-45]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 65_CONSOLIDATED FEDERAL AIR RULE--Table of Contents
 
                        Subpart C_Storage Vessels
 
Sec. 65.42  Control requirements.

    (a) For each storage vessel to which this subpart applies, the owner 
or operator shall comply with the requirements of paragraph (b) or (c) 
of this section.
    (b) For each storage vessel storing a liquid for which the maximum 
true vapor pressure of the total regulated material in the liquid is 
less than 76.6 kilopascals (10.9 pounds per square inch), the owner or 
operator shall reduce regulated material emissions to the atmosphere as 
provided in any one of the paragraphs (b)(1) through (7) of this 
section.
    (1) Internal floating roof (IFR). Operate and maintain a fixed roof 
and internal floating roof meeting the requirements of Sec. 65.43.
    (2) External floating roof (EFR). Operate and maintain an external 
floating roof meeting the requirements of Sec. 65.44.
    (3) EFR converted to IFR. Operate and maintain an external floating 
roof converted to an internal floating roof meeting the requirements of 
Sec. 65.45.
    (4) Closed vent system and flare. Operate and maintain a closed vent 
system and flare as specified in Sec. 65.142(a)(1). Periods of planned 
routine maintenance of the flare during which the flare does not meet 
the specifications of Sec. 65.147 shall not exceed 240 hours per year. 
The specifications and requirements in Sec. 65.147 for flares do not 
apply during periods of planned routine maintenance or during a control 
system malfunction. The owner or operator shall report the periods of 
planned routine maintenance as specified in Sec. 65.166(d).
    (5) Closed vent system and control device. Operate and maintain a 
closed vent system and control device as specified in the following and 
Sec. 65.142(a)(2):
    (i) Except as provided in paragraph (b)(5)(ii) of this section, the 
control device shall be designed and operated to reduce inlet emissions 
of regulated material by 95 percent or greater.
    (ii) For owners or operators referenced to this part from 40 CFR 
part 63, subpart G, and if the owner or operator of a storage vessel can 
demonstrate that a control device installed on the storage vessel on or 
before December 31, 1992 is designed to reduce inlet emissions of total 
organic HAP by greater than or equal to 90 percent but less than 95 
percent, then the control device is required to be operated to reduce 
inlet emissions of total organic HAP by 90 percent or greater.
    (iii) Periods of planned routine maintenance of the control device, 
during which the control device does not meet the specifications of 
paragraph (b)(5)(i) or (ii) of this section, shall not exceed 240 hours 
per year. The owner or operator shall report the periods of planned 
routine maintenance as specified in Sec. 65.166(d).
    (iv) The requirements in paragraph (b)(5)(i) of this section for 
control devices do not apply during periods of planned routine 
maintenance or during a control system malfunction.
    (6) Route to process or fuel gas system. Route the emissions to a 
process or a

[[Page 45]]

fuel gas system as specified in Sec. 65.142(a)(3). Whenever the owner 
or operator bypasses the fuel gas system or process, the owner or 
operator shall comply with the recordkeeping requirement in Sec. 
65.163(b)(3). Bypassing is permitted if the owner or operator complies 
with one or more of the following conditions:
    (i) The liquid level in the storage vessel is not increased;
    (ii) The emissions are routed through a closed vent system to a 
control device complying with paragraph (b)(4) or (5) of this section; 
or
    (iii) The total aggregate amount of time during which the emissions 
bypass the fuel gas system or process during the calendar year without 
being routed to a control device, for all reasons (except startups/
shutdowns/malfunctions or product changeovers of flexible operation 
units and periods when the storage vessel has been emptied and 
degassed), does not exceed 240 hours.
    (7) Equivalent requirements. Comply with an equivalent to the 
requirements in any one of the paragraphs (b)(1) through (6) of this 
section, as provided in Sec. 65.46.
    (c) For each storage vessel storing a liquid for which the maximum 
true vapor pressure of the total regulated material in the liquid is 
greater than or equal to 76.6 kilopascals (10.9 pounds per square inch), 
the owner or operator shall meet the requirements in paragraph (b)(4), 
(5), or (6) of this section, or equivalent as provided in Sec. 65.46.