SAN DIEGO COUNTY AIR POLLUTION CONTROL DISTRICT

RULE 260.113b - TESTING AND PROCEDURES
(Rev. Effect. 10/16/90)

The owner or operator of each storage vessel as specified in Rule 260.112b(a) shall meet the requirements of Sections (a), (b), or (c) of this rule. The applicable section for a particular storage vessel depends on the control equipment installed to meet the requirements of Rule 260.112b.

(a) After installing the control equipment required to meet Rule 260.112b(a)(1) (permanently affixed roof and internal floating roof), each owner or operator shall:
 

  1.  Visually inspect the internal floating roof, the primary seal, and the secondary seal (if one is in service), prior to filling the storage vessel with VOL. If there are holes, tears, or other openings in the primary seal, the secondary seal, or the seal fabric or defects in the internal floating roof, or both, the owner or operator shall repair the items before filling the storage vessel.
  2. For vessels equipped with a liquid-mounted or mechanical shoe primary seal, visually inspect the internal floating roof and the primary seal or the secondary seal (if one is in service) through manholes and roof hatches on the fixed roof at least once every 12 months after initial fill. If the internal floating roof is not resting on the surface of the VOL inside the storage vessel, or there is liquid accumulated on the roof, or the seal is detached, or there are holes or tears in the seal fabric, the owner or operator shall repair the items or empty and remove the storage vessel from service within 45 days. If a failure that is detected during inspections required in this section cannot be repaired within 45 days and if the vessel cannot be emptied within 45 days, a 30-day extension may be requested from the Control Officer in the inspection report required in Rule 260.115b(a)(3). Such a request for an extension must document that alternate storage capacity is unavailable and specify a schedule of actions the company will take that will assure that the control equipment will be repaired or the vessel will be emptied as soon as possible.
  3. For vessels equipped with a double-seal system as specified in Rule 260.112b(a)(1)(ii)(B):

 

 

  1. Visually inspect the internal floating roof, the primary seal, the secondary seal (if one is in service), gaskets, slotted membranes (if any), and sleeve seals (if any) each time the storage vessel is emptied and degassed. If the internal floating roof has defects, the primary seal has holes, tears, or other openings in the seal or the seal fabric, or the secondary seal has holes, tears, or other openings in the seal or the seal fabric, or the gaskets no longer close off the liquid surfaces from the atmosphere, or the slotted membrane has more than 10 percent open area, the owner or operator shall repair the items as necessary so that none of the conditions specified in this section exist before refilling the storage vessel with VOL. In no event shall inspections conducted in accordance with this provision occur at intervals greater than 10 years in the case of vessels conducting the annual visual inspection as specified in Subsections (a)(2) and (a)(3)(ii) of this rule and at intervals no greater than 5 years in the case of vessels specified in Subsection (a)(3)(i) of this rule.
  2. Notify the Control Officer in writing at least 30 days prior to the filling or refilling of each storage vessel for which an inspection is required by Subsections (a)(1) and (a)(4) of this rule to afford the Control Officer the opportunity to have an observer present. If the inspection required by Subsection (a)(4) of this rule is not planned and the owner or operator could not have known about the inspection 30 days in advance of refilling the tank, the owner or operator shall notify the Control Officer at least 7 days prior to the refilling of the storage vessel. Notification shall be made by telephone immediately followed by written documentation demonstrating why the inspection was unplanned. Alternatively, this notification including the written documentation may be made in writing and sent by express mail so that it is received by the Control Officer at least 7 days prior to the refilling.

(b) After installing the control equipment required to meet Rule 260.112b(a)(2) (external floating roof), the owner or operator shall:
 

  1. Determine the gap areas and maximum gap widths, between the primary seal and the wall of the storage vessel and between the secondary seal and the wall of the storage vessel according to the following frequency.

 

 

  1. Determine gap widths and areas in the primary and secondary seals individually by the following procedures:

 

 

  1.  Add the gap surface area of each gap location for the primary seal and the secondary seal individually and divide the sum for each seal by the nominal diameter of the tank and compare each ratio to the respective standards in Subsection (b)(4) of this rule.
  2. Make necessary repairs or empty the storage vessel within 45 days of identification in any inspection for seals not meeting the requirements listed in Subsections (b)(4)(i) and (ii) of this rule.

 

 

 

 

 

 

  1. Notify the Control Officer 30 days in advance of any gap measurements required by Subsection (b)(1) of this rule to afford the Control Officer the opportunity to have an observer present.
  2. Visually inspect the external floating roof, the primary seal, secondary seal, and fittings each time the vessel is emptied and degassed.

 

(c) The owner or operator of each source that is equipped with a closed vent system and control device as required in Rule 260.112b(a)(3) or (b)(2) (other than a flare) is exempt from Rule 260.8 of the General Provisions and shall meet the following requirements:
 

  1. Submit for approval by the Administrator as an attachment to the notification required by Rule 260.7(a)(1) or, if the facility is exempt from Rule 260.7(a)(1), as an attachment to the notification required by Rule 260.7(a)(2), an operating plan containing the information listed below.

 

 

  1.  Operate the closed vent system and control device and monitor the parameters of the closed vent system and control device in accordance with the operating plan submitted to the Control Officer in accordance with Subsection (c)(1) of this rule, unless the plan was modified by the Control Officer during the review process. In this case, the modified plan applies.

(d) The owner or operator of each source that is equipped with a closed vent system and a flare to meet the requirements of Rule 260.112b(a)(3) or (b)(2) shall meet the requirements as specified in the General Control Device requirements, §60.18(e) and (f).