Title 7 Natural Resources and Environmental Control
1124 Control of Volatile Organic Compound Emissions
24.0 Bulk Gasoline Plants
01/11/1993
24.1 Applicability
24.1.1 The provisions of 24.0 of this regulation apply to all unloading, loading, and storage operations at bulk gasoline plants and to any gasoline tank truck delivering or receiving gasoline at a bulk gasoline plant.
24.1.2 The following are subject only to the requirements of 24.3.3.7, 24.3.3.8 and 24.3.3.9 of this regulation:
24.1.2.1 Any stationary storage tank of 2,082 liters (L) (550 gallons [gal]) capacity or less notwithstanding 8.0 of this regulation.
24.1.2.2 Any bulk gasoline plant with an average daily throughput of gasoline of less than 15,000 L (4,000 gal) on a 30-day rolling average provided that records are maintained according to the requirements in 24.5.1 of this regulation. Any plant that becomes or is currently subject to all of the provisions of 24.0 of this regulation by exceeding this applicability threshold will remain subject to these provisions even if its throughput later falls below the applicability threshold. Any facility that is currently subject to a state or federal rule promulgated pursuant to the Clean Air Act Amendments of 1977 by exceeding an applicability threshold is and will remain subject to these provisions, even if its throughput or emissions have fallen or later fall below the applicability threshold.
24.2 Definitions. As used in 24.0 of this regulation, all terms not defined herein shall have the meaning given them in the November 15, 1990 Clean Air Act Amendments (CAAA), or in 2.0 of this regulation.
24.3 Standards
24.3.1 Each bulk gasoline plant subject to 24.0 of this regulation shall be equipped with a vapor balance system between the gasoline storage tank and the incoming gasoline tank truck designed to capture and transfer vapors displaced during filling of the gasoline storage tank. These lines shall be equipped with fittings that are vapor-tight and that automatically and immediately close upon disconnection.
24.3.2 Each bulk gasoline plant subject to 24.0 of this regulation shall be equipped with a vapor balance system between the gasoline storage tank and the outgoing gasoline tank truck designed to capture and transfer vapors displaced during the loading of the gasoline tank truck. The vapor balance system shall be designed to prevent any vapors collected at one loading rack from passing to another loading rack.
24.3.3 Each owner or operator of a bulk gasoline plant subject to 24.0 of this regulation shall act to ensure that the procedures in 24.3.3.1 through 24.3.3.9 of this regulation are followed during all loading, unloading, and storage operations:
24.3.3.1 The vapor balance system required by 24.3.1 and 24.3.2 of this regulation shall be connected between the tank truck and storage tank during all gasoline transfer operations.
24.3.3.2 All storage tank openings, including inspection hatches and gauging and sampling devices, shall be vapor-tight when not in use.
24.3.3.3 The gasoline tank truck compartment hatch covers shall not be opened during product transfer.
24.3.3.4 All vapor balance systems shall be designed and operated at all times to prevent gauge pressure in the gasoline tank truck from exceeding 450 millimeters (mm) (18 inches [in.]) of water and vacuum from exceeding 150 mm (5.9 in.) of water during product transfers.
24.3.3.5 No pressure vacuum relief valve in the bulk gasoline plant vapor balance system shall begin to open at a system pressure of less than 450 mm (18 in.) of water or at a vacuum of less than 150 mm (5.9 in.) of water.
24.3.3.6 All product transfers involving gasoline tank trucks at bulk gasoline plants subject to 24.0 of this regulation shall be limited to vapor-tight gasoline tank trucks.
24.3.3.7 Filling of storage tanks shall be restricted to submerged fill.
24.3.3.8 Loading of outgoing gasoline tank trucks shall be limited to submerged fill.
24.3.3.9 Owners or operators of bulk gasoline plants or owners or operators of tank trucks shall observe all parts of the transfer and shall discontinue transfer if any vapor or liquid leaks are observed.
24.3.4 Each calendar month, the vapor balance systems described in 24.3.1 and 24.3.2 of this regulation and each loading rack that loads gasoline tank trucks shall be inspected for liquid or vapor leaks during product transfer operations. For purposes of 24.3 of this regulation, detection methods incorporating sight, sound, or smell are acceptable. Each leak that is detected shall be repaired within 15 calendar days after it is detected.
24.4 Compliance provisions. A pressure measurement device (liquid manometer, magnehelic gauge, or equivalent instrument) capable of measuring 500 mm (20 in.) of water gauge pressure within a ±2.5 mm (0.098 in.) of water precision, shall be calibrated and installed on the bulk gasoline plant vapor balance system at a pressure tap, located as close as possible to the connection with the gasoline tank truck, to allow determination of compliance with 24.3.3.4 of this regulation.
24.5 Recordkeeping. The owner or operator of a facility subject to this regulation shall maintain the following records in a readily accessible location for at least five years and shall immediately make these records available to the Department upon verbal or written request.
24.5.1 All bulk gasoline plants subject to 24.0 of this regulation shall maintain daily records showing the quantity of all gasoline loaded into gasoline tank trucks.
24.5.2 A record of each monthly leak inspection required under 24.3.4 of this regulation shall be kept on file at the plant. Inspection records shall include, at a minimum, the following information:
24.5.2.1 Date of inspection.
24.5.2.2 Findings (may indicate no leaks discovered or location, nature, and severity of each leak).
24.5.2.3 Leak determination method.
24.5.2.4 Corrective action (date each leak repaired and reasons for any repair interval in excess of 15 calendar days).
24.5.2.5 Inspector name and signature.
24.6 Reporting. The owner or operator of any facility containing sources subject to 24.0 of this regulation shall comply with the requirements in 5.0 of this regulation.
