[Code of Federal Regulations]
[Title 40, Volume 11]
[Revised as of July 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR63.1253]

[Page 86-88]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 63--NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS FOR SOURCE CATEGORIES--Table of Contents
 
 Subpart GGG--National Emission Standards for Pharmaceuticals Production
 
Sec. 63.1253  Standards: Storage tanks.

    (a) Except as provided in paragraphs (d), (e), and (f) of this 
section, the owner or operator of a storage tank meeting the criteria of 
paragraph (a)(1) of this section is subject to the requirements of 
paragraph (b) of this section. Except as provided in paragraphs (d), 
(e), and (f) of this section, the owner or operator of a storage tank 
meeting the criteria of paragraph (a)(2) of this section is subject to 
the requirements of

[[Page 87]]

paragraph (c) of this section. Compliance with the provisions of 
paragraphs (b) and (c) of this section is demonstrated using the initial 
compliance procedures in Sec. 63.1257(c) and the monitoring requirements in 
Sec. 63.1258.
    (1) A storage tank with a design capacity greater than or equal to 
38 m\3\ but less than 75 m\3\ storing a liquid for which the maximum 
true vapor pressure of total HAP is greater than or equal to 13.1 kPa.
    (2) A storage tank with a design capacity greater than or equal to 
75 m\3\ storing a liquid for which the maximum true vapor pressure of 
total HAP is greater than or equal to 13.1 kPa.
    (b) The owner or operator of a storage tank shall equip the affected 
storage tank with either a fixed roof with internal floating roof, an 
external floating roof, an external floating roof converted to an 
internal floating roof, or a closed-vent system meeting the conditions 
of Sec. 63.1252(b) with a control device that meets any of the following 
conditions:
    (1) Reduces inlet emissions of total HAP by 90 percent by weight or 
greater;
    (2) Reduces emissions to outlet concentrations less than or equal to 
20 ppmv as TOC and less than or equal to 20 ppmv as hydrogen halides and 
halogens;
    (3) Is an enclosed combustion device that provides a minimum 
residence time of 0.5 seconds at a minimum temperature of 760 C;
    (4) Is a flare that meets the requirements of Sec. 63.11(b); or
    (5) Is a control device specified in Sec. 63.1257(a)(4).
    (c) The owner or operator of a storage tank shall equip the affected 
storage tank with either a fixed roof with internal floating roof, an 
external floating roof, an external floating roof converted to an 
internal floating roof, or a closed-vent system meeting the conditions 
of Sec. 63.1252(b) with a control device that meets any of the following 
conditions:
    (1) Reduces inlet emissions of total HAP as specified in paragraph 
(c)(1) (i) or (ii) of this section:
    (i) By 95 percent by weight or greater; or (ii) If the owner or 
operator can demonstrate that a control device installed on a storage 
tank on or before April 2, 1997 is designed to reduce inlet emissions of 
total HAP by greater than or equal to 90 percent by weight but less than 
95 percent by weight, then the control device is required to be operated 
to reduce inlet emissions of total HAP by 90 percent or greater.
    (2) Reduces emissions to outlet concentrations less than or equal to 
20 ppmv as TOC and less than or equal to 20 ppmv as hydrogen halides and 
halogens;
    (3) Is an enclosed combustion device that provides a minimum 
residence time of 0.5 seconds at a minimum temperature of 760 C;
    (4) Is a flare that meets the requirements of Sec. 63.11(b); or
    (5) Is a control device specified in Sec. 63.1257(a)(4).
    (d) As an alternative standard, the owner or operator of an existing 
or new affected source may comply with the storage tank standards by 
routing storage tank vents to a combustion control device achieving an 
outlet TOC concentration, as calibrated on methane or the predominant 
HAP, of 20 ppmv or less, and an outlet concentration of hydrogen halides 
and halogens of 20 ppmv or less. If the owner or operator is routing 
emissions to a noncombustion control device, it must achieve an outlet 
TOC concentration, as calibrated on methane or the predominant HAP, of 
50 ppmv or less, and an outlet concentration of hydrogen halides and 
halogens of 50 ppmv or less. Compliance with the outlet concentrations 
shall be determined by the initial compliance procedures of Sec. 
63.1257(c)(4) and the continuous emission monitoring requirements of Sec. 
63.1258(b)(5).
    (e) Planned routine maintenance. The specifications and requirements 
in paragraphs (b) through (d) of this section for control devices do not 
apply during periods of planned routine maintenance. Periods of planned 
routine maintenance of the control devices (including CCCD subject to Sec. 
63.1252(h)), during which the control device does not meet the 
specifications of paragraphs (b) through (d) of this section, as 
applicable, shall not exceed 240 hours in any 365-day period.
    (f) Vapor balancing alternative. As an alternative to the 
requirements in

[[Page 88]]

paragraphs (b) and (c) of this section, the owner or operator of an 
existing or new affected source may implement vapor balancing in 
accordance with paragraphs (f)(1) through (7) of this section.
    (1) The vapor balancing system must be designed and operated to 
route organic HAP vapors displaced from loading of the storage tank to 
the railcar or tank truck from which the storage tank is filled.
    (2) Tank trucks and railcars must have a current certification in 
accordance with the U.S. Department of Transportation (DOT) pressure 
test requirements of 49 CFR part 180 for tank trucks and 49 CFR 173.31 
for railcars.
    (3) Hazardous air pollutants must only be unloaded from tank trucks 
or railcars when vapor collection systems are connected to the storage 
tank's vapor collection system.
    (4) No pressure relief device on the storage tank, or on the 
railcar, or tank truck shall open during loading or as a result of 
diurnal temperature changes (breathing losses).
    (5) Pressure relief devices on affected storage tanks must be set to 
no less than 2.5 psig at all times to prevent breathing losses. The 
owner or operator shall record the setting as specified in Sec. 
63.1259(b)(12) and comply with the requirements for each pressure relief 
valve in paragraphs (f)(5)(i) through (iii) of this section:
    (i) The pressure relief valve shall be monitored quarterly using the 
method described in Sec. 63.180(b).
    (ii) An instrument reading of 500 ppmv or greater defines a leak.
    (iii) When a leak is detected, it shall be repaired as soon as 
practicable, but no later than 5 days after it is detected, and the 
owner or operator shall comply with the recordkeeping requirements of Sec. 
63.1255(g)(4)(i) through (iv).
    (6) Railcars or tank trucks that deliver HAP to an affected storage 
tank must be reloaded or cleaned at a facility that utilizes one of the 
control techniques in paragraph (f)(6)(i) through (ii) of this section:
    (i) The railcar or tank truck must be connected to a closed-vent 
system with a control device that reduces inlet emissions of HAP by 90 
percent by weight or greater; or
    (ii) A vapor balancing system designed and operated to collect 
organic HAP vapor displaced from the tank truck or railcar during 
reloading must be used to route the collected HAP vapor to the storage 
tank from which the liquid being transferred originated.
    (7) The owner or operator of the facility where the railcar or tank 
truck is reloaded or cleaned must comply with the requirements in 
paragraph (f)(7)(i) through (iii) of this section:
    (i) Submit to the owner or operator of the affected storage tank and 
to the Administrator a written certification that the reloading or 
cleaning facility will meet the requirements of this section. The 
certifying entity may revoke the written certification by sending a 
written statement to the owner or operator of the affected storage tank 
giving at least 90 days notice that the certifying entity is rescinding 
acceptance of responsibility for compliance with the requirements of 
this paragraph (b)(7).
    (ii) If complying with paragraph (f)(6)(i) of this section, 
demonstrate initial compliance in accordance with Sec. 63.1257(c), 
demonstrate continuous compliance in accordance with Sec. 63.1258, keep 
records as specified in Sec. 63.1259, and prepare reports as specified in Sec. 
63.1260.
    (iii) If complying with paragraph (f)(6)(ii) of this section, keep 
records of:
    (A) The equipment to be used and the procedures to be followed when 
reloading the railcar or tank truck and displacing vapors to the storage 
tank from which the liquid originates, and
    (B) Each time the vapor balancing system is used to comply with 
paragraph (f)(6)(ii) of this section.

[63 FR 50326, Sept. 21, 1998, as amended at 65 FR 52601, Aug. 29, 2000; 
66 FR 40132, Aug. 2, 2001]