Tenn. Comp. R. & Regs. 1200-03-18-.23 - BULK GASOLINE TERMINALS

(1) Applicability of this rule is as follows:

(a) This rule applies to all loading racks at any bulk gasoline terminal which deliver liquid product into gasoline tank trucks and to gasoline tank trucks while loading at a terminal subject to this rule.

(b) Any facility that becomes or is currently subject to the provisions of this rule by exceeding the throughput specified in the definition of bulk gasoline terminal in Rule .01 of this chapter will remain subject to these provisions even if its throughput later falls below the applicability threshold.

(2) Standards as follow apply:

(a) Each loading rack at a bulk gasoline terminal subject to this rule shall be equipped with a vapor collection system designed to collect the total volatile organic compound (VOC) vapors displaced from tank trucks during product loading.

(b) Each vapor collection system shall be designed to prevent any VOC vapors collected at one loading rack from passing to another loading rack.

(c) In Davidson, Rutherford, Shelby, Sumner, Williamson, and Wilson Counties, loadings of liquid product into gasoline tank trucks shall be limited to vapor-tight gasoline tank trucks using the following procedures:

1. The owner or operator shall obtain the vapor-tightness documentation described in Subparagraphs (4)(a) and (b) of this rule for each gasoline tank truck that is to be loaded at the bulk gasoline terminal loading rack subject to this rule;

2. The owner or operator shall require the tank identification number, which allows for verification of vapor-tightness documentation, to be recorded as each gasoline tank truck is loaded at the terminal;

3. The owner or operator shall cross-check each tank identification number with the file of tank vapor-tightness documentation within 2 weeks after the corresponding tank is loaded;

4. The terminal owner or operator shall notify the owner or operator of each non-vapor-tight gasoline tank truck loaded at the bulk gasoline terminal loading rack that the truck is not vapor-tight subject to this rule within 3 weeks after the loading has occurred; and

5. The terminal owner or operator shall insure that the non-vapor-tight gasoline tank truck will not be reloaded at the bulk gasoline terminal loading rack subject to this rule until vapor-tightness documentation for that tank is obtained.

(d) The terminal owner or operator or tank truck owner or operator shall ensure that loadings of any gasoline tank truck at the bulk gasoline terminal loading rack subject to this rule is made only into a tank equipped with vapor collection equipment that is compatible with the terminal's vapor collection system.

(e) The terminal owner or operator or tank truck operator shall ensure that the terminal's and the tank truck's vapor collection systems are connected during each loading of a gasoline tank truck at the bulk gasoline terminal loading racks subject to this rule.

(f) The vapor collection and liquid loading equipment shall be designed and operated to prevent gauge pressure in the tank truck from exceeding 4,500 Pascals (Pa) (450 millimeters [mm] of water) during product loading. This level shall not be exceeded when measured by the procedures specified in Subparagraph (3)(a) of this rule.

(g) No pressure-vacuum vent in the bulk gasoline terminal's vapor collection system shall begin to open at a system pressure less than 4,500 Pa (450 mm of water).

(h) Each calendar month, the vapor collection system, the vapor control system, and each loading rack handling gasoline shall be inspected during the loading of gasoline tank trucks for liquid or vapor leaks. For purposes of this subparagraph, detection methods incorporating sight, sound, or smell are acceptable. Each detection of a leak shall be recorded and the source of the leak repaired within 15 calendar days after it is detected. Dripping liquid resulting upon disconnect following gasoline transfer shall not constitute a leak.

(i) Emissions to the atmosphere from the vapor collection system due to the loading of gasoline tank trucks shall not exceed 80 milligrams per liter (mg/L) (4.7 grains per gallon [grain/ga]) of gasoline loaded.

(j) Loading of outgoing gasoline tank trucks shall be restricted to the use of submerged fill, with all hatches on the gasoline tank truck kept closed and securely fastened during loading.

(3) Test methods and procedures as follow apply:

(a) For the purpose of determining compliance with Subparagraph (2)(f) of this rule, the following procedures shall be used:

1. Calibrate and install a pressure measurement device (liquid manometer, magnehelic gauge, or equivalent instrument) capable of measuring up to 500 mm (20 inches [in]) of water gauge pressure with _+2.5 mm (0.098 in) of water precision.

2. Connect the pressure measurement device to a pressure tap in the terminal's vapor collection system, located as close as possible to the connection with the gasoline tank truck.

3. During the performance test, record the pressure every 5 minutes (min) while a gasoline tank truck is being loaded, and record the highest instantaneous pressure that occurs during each loading. Every loading position shall be tested at least once during the performance test.

(b) For the purpose of determining compliance with the mass emission limitations of Subparagraph (2)(i) of this rule, the following reference methods shall be used:

1. For the determination of volume at the exhaust vent:

(i) Reference Method 2B for combustion vapor processing systems; and

(ii) Reference Method 2A for all other vapor processing systems.

2. For the determination of total organic compounds concentration at the exhaust vent, Reference Method 25A or 25B. The calibration gas shall be either propane or butane.

(c) Immediately prior to a performance test required for determination of compliance with Subparagraphs (2)(f) and (i) of this rule, all potential sources of vapor leakage in the terminal's vapor collection system equipment shall be monitored for leaks according to the procedures in Rule .85 of this chapter. The monitoring shall be conducted only while a gasoline tank truck is being loaded. A reading of 10,000 parts per million by volume (ppmv) or greater as methane shall be considered a leak. All leaks shall be repaired prior to conducting the performance test.

(d) The test procedure for determining compliance with Subparagraphs (2)(f) and (i) of this rule is as follows:

1. All testing equipment shall be prepared and installed as specified in the appropriate test methods;

2. The time period for a performance test shall be not less than 6 hours, during which at least 300,000 liters (L) (80,000 gallons [gal]) of gasoline are loaded. If the throughput criterion is not met during the initial 6 hours, the test may be either continued until the throughput criterion is met, or resumed the next day with another complete 6 hours of testing. As much as possible, testing should be conducted during the 6-hour period in which the highest throughput normally occurs;

3. For intermittent vapor processing systems:

(i) The vapor holder level shall be recorded at the start of the performance test. The end of the performance test shall coincide with a time when the vapor holder is at its original level; and

(ii) At least two startups and shutdowns of the vapor processor shall occur during the performance test. If this does not occur under automatically controlled operation, the system shall be manually controlled.

4. The volume of gasoline dispensed during the performance test period at all loading racks whose vapor emissions are controlled by the vapor processing system being tested shall be determined. This volume may be determined from terminal records or from gasoline dispensing meters at each loading rack;

5. An emission testing interval shall consist of each 5-minute period during the performance test. For each interval:

(i) The reading from each measurement instrument shall be recorded; and

(ii) The volume exhausted and the average total organic compounds concentration in the exhaust vent shall be determined, as specified in the appropriate test method. The average total organic compounds concentration shall correspond to the volume measurement by taking into account the sampling system response time;

6. The mass emitted during each testing interval shall be calculated as follows:

M_ei = 10^-6 KV_es C_e

where:

M_ei = Mass of total organic compounds (milligrams [mg]) emitted during ei testing interval i;

V_es = Volume of air-vapor mixture exhausted (cubic meters [m³ ]), at standard conditions;

C_e = Total organic compounds concentration (measured as carbon) at the exhaust vent (ppmv);

K = Density of calibration gas (milligrams/cubic meter [mg/m³ ]) at standard conditions;

= 1.83 x 10⁶ for propane;

= 2.41 x 10⁶ for butane; and

s = Standard conditions, 20° C and 760 millimeters of mercury (mm Hg);and

7. The total organic compounds mass emissions shall be calibrated as follows:

Click to view Image

where:

E = mass of total organic compounds emitted per volume of gasoline loaded, mg/L;

M_ei = mass of total organic compounds emitted during testing interval i, mg;

L = total volume of gasoline loaded, L; and

n = number of testing intervals.

(e) The owner or operator may adjust the emission results to exclude the methane and ethane content in the exhaust vent by any method approved by the Technical Secretary and the EPA.

(4) The owner or operator of a facility subject to the requirements of this rule shall maintain the following records for at least 3 years and shall make these records available to the Technical Secretary upon request:

(a) The tank truck vapor-tightness documentation required under Subparagraph (2)(c) of this rule shall be kept on file at the terminal in a permanent form available for inspection.

(b) The documentation file for each gasoline tank truck shall be updated at least once per year to reflect current test results as determined by Reference Method 27. This documentation shall include, as a minimum, the following information:

1. Test title: Gasoline Delivery Tank Pressure Test--Reference Method 27;

2. Tank owner and address;

3. Tank identification number;

4. Testing location;

5. Date of test;

6. Tester name and signature;

7. Witnessing inspector, if any: Name, signature, and affiliation; and

8. Test results: Actual pressure change in 5 min, mm of water (average for two runs).

(c) A record of each monthly leak inspection required under Subparagraph (2)(h) of this rule shall be kept on file at the terminal. Inspection records shall include, as a minimum, the following information:

1. Date of inspection;

2. Findings (may indicate either no leaks discovered or the location, nature, and severity of each leak);

3. Leak determination method;

4. Corrective action (date each leak repaired, reasons for any repair interval in excess of 15 calendar days; and

5. Inspector name and signature.

(d) The terminal owner or operator shall keep documentation of all notifications required under Part (2)(c)4 of this rule on file at the terminal.

(e) Daily records shall be maintained of gasoline throughput.

(5) The owner or operator of any facility containing sources subject to this rule shall comply with the requirements in Paragraphs .04(1) and (2) of this chapter.

Notes

Tenn. Comp. R. & Regs. 1200-03-18-.23

Original rule filed May 15, 1979; effective July 10, 1979. Amendment filed March 23, 1981; effective May 7, 1981. Amendment filed April 23, 1992; effective June 7, 1992. Repeal and new rule filed March 8, 1993; effective April 22, 1993. Amendment filed July 27, 1995; effective October 9, 1995.

Authority: T.C.A. §§ 4-5-202 and 68-201-105.