SAN DIEGO COUNTY AIR POLLUTION CONTROL DISTRICT

RULE 260.112b - STANDARD FOR VOLATILE ORGANIC COMPOUNDS (VOC)

(a) The owner or operator of each storage vessel either with a design capacity greater than or equal to 151 m3 (39,890 gal) containing a VOL that, as stored, has a maximum true vapor pressure equal to or greater than 5.2 kPa (0.75 psia) but less than 76.6 kPa (11.1 psia) or with a design capacity greater than or equal to 75 m3 (19,810 gal) but less than 151 m3 (39,890 gal) containing a VOL that, as stored, has a maximum true vapor pressure equal to or greater than 27.6 kPa (4.0 psia) but less than 76.6 kPa (11.1 psia), shall equip each storage vessel with one of the following:
 

  1.  A fixed roof in combination with an internal floating roof meeting the following specifications:

 

 

 

 

 

 

 

  1.  An external floating roof. An external floating roof means a pontoon-type or double-deck type cover that rests on the liquid surface in a vessel with no fixed roof. Each external floating roof must meet the following specifications:

 

 

 

 

  1.  A closed vent system and control device meeting the following specifications:

 

 

  1.  A system equivalent to those described in Subsections (a)(1), (a)(2), or (a)(3) of this rule as provided in Rule 260.114b of this subpart.

(b) The owner or operator of each storage vessel with a design capacity greater than or equal to 75 m3 (19,810 gal) which contains a VOL that, as stored, has a maximum true vapor pressure greater than or equal to 76.6 kPa (11.1 psia) shall equip each storage vessel with one of the following:
 

  1.  A closed vent system and control device as specified in Rule 260.112b(a)(3).
  2. A system equivalent to that described in Subsection (b)(1) as provided in Rule 260.114b of this subpart.