A. No person shall place, store or hold in any reservoir, stationary tank or other container having a capacity of forty thousand gallons (one hundred fifty-one thousand four hundred liters) or more any petroleum liquid having a vapor pressure of 1.5 pounds per square inch absolute or greater under actual storage conditions, unless such tank, reservoir or other container is a pressure tank maintaining working pressure sufficient at all times to prevent hydrocarbon vapor or gas loss to the atmosphere or is equipped with one of the following vapor loss control devices, properly installed, in operation, and in good working order:
1. A floating roof consisting of a pontoon-type double-deck-type roof resting on the surface of the liquid contents and equipped with a closure seal to close the space between the roof eave and tank wall and a vapor balloon or vapor dome, designed in accordance with accepted standards of the petroleum industry. The control equipment shall not be used if the petroleum liquid has a vapor pressure of twelve pounds per square inch absolute or greater under actual conditions.
a. All tank gauging and sampling devices shall be gas tight except when gauging or sampling is taking place.
b. There shall be no visible holes, tears or other openings in the seal, or in any seal fabric. Where applicable, all openings except drains shall be equipped with a cover seal or lid. The cover seal or lid shall be in a closed position at all times, except when the device is in actual use.
c. Automatic bleeder vents shall be closed at all times, except when the roof is floated off or landed on the roof leg supports.
d. Rim vents, if provided, shall be set to open when the roof is being floated off the roof leg supports, or at the manufacturer's recommended setting.
2. Other equipment proven to be of equal efficiency for preventing discharge of hydrocarbon gases and vapors to the atmosphere.
B. Any other petroleum liquid storage tank shall be equipped with a submerged filing device, or acceptable equivalent, for the control of hydrocarbon emissions.
C. All facilities for dock loading of petroleum products, having a vapor pressure of 1.5 pounds per square inch absolute or greater at loading pressure, shall provide for submerged filling or acceptable equivalent for control of hydrocarbon emissions.
D. All pumps and compressors which handle volatile organic compounds shall be equipped with mechanical seals or other equipment of equal efficiency to prevent the release of organic contaminants into the atmosphere.
E. The monitoring of operations required by this section is as follows:
1. The owner or operator of any petroleum liquid storage vessel to which this section applies shall for each such storage vessel maintain a file of each type of petroleum liquid stored, of the typical reid vapor pressure of each type of petroleum liquid stored, and of dates of storage. Dates on which the storage vessel is empty shall be shown.
2. The owner or operator of any petroleum liquid storage vessel to which this section applies shall for such storage vessel determine and record the average monthly storage temperature and true vapor pressure of the petroleum liquid stored at such temperature if either:
a. The petroleum liquid has a true vapor pressure, as stored, greater than twenty-six mm Hg (0.5 psia) but less than seventy-eight mm Hg (1.5 psia) and is stored in a storage vessel other than one equipped with a floating roof, a vapor recovery system or their equivalents; or
b. The petroleum liquid has a true vapor pressure, as stored, greater than 470 mm Hg (9.1 psia) and is stored in a storage vessel other than one equipped with a vapor recovery system or its equivalent.
3. The average monthly storage temperature shall be an arithmetic average calculated for each calendar month, or portion thereof if storage is for less than a month, from bulk liquid storage temperatures determined at least once every seven days.
4. The true vapor pressure shall be determined by the procedures in American Petroleum Institute Bulletin 2517, amended as of February, 1980 (and no future editions), which is incorporated herein by reference and on file with the Office of the Secretary of State. The procedure is dependent upon determination of the storage temperature and the Reid vapor pressure, which requires sampling of the petroleum liquids in the storage vessels. Unless the control officer requires in specific cases that the stored petroleum liquid be sampled, the true vapor pressure may be determined by using the average monthly storage temperature and the typical Reid vapor pressure. For those liquids for which certified specifications limiting the Reid vapor pressure exist, the Reid vapor pressure may be used. For other liquids, supporting analytical data must be made available upon request to the control officer when typical Reid vapor pressure is used.
(Ord. 1996-50 § 3, 1996: Ord. 1993-128 § 4 (part), 1993)