## APPENDIX B Regulations (related to CTG RACT, Major Source VOCRACT, and Major Source NOx RACT) from Vermont Air Pollution Control Regulations Submitted to replace theversion of each of these rules currently federally approved in the Vermont SIP 5-251(3) Control of Nitrogen Oxides Emissions : RACT for large stationary sources and 5-253.3 Bulk Gasoline Plants

Notes: For 5-251(3), there is no change in the wording ofthe existing SIP rule, only in the numbering ofit. This rule currently is in the Vermont SIP as 5-251(2) . The numbering was changed when a new sub-section 5- 252(2) was adopted in Vermont regulation, but the new sub-section is not beingsubmittedfor inclusion in the SIP . For 5-253.3, the entire rule attachedwill replace the existingSIP rule with the same number.

### 5-251 CONTROL OF NITROGENOXIDES EMISSIONS

(3) Reasonably available control technology for large stationary sources. (a) The owner or operator ofany stationary source that has allowable emissions of one hundred (100) tons per year or more of nitrogen oxides shall install, maintain and use reasonably available control technology, approved by the Secretary, to limit the discharge of nitrogen oxides fromthe source by May 31, 1995. (b) Any source that becomes or is currently subject to the provisions of this subsection by exceeding the applicability threshold in paragraph (3)(a) ofthis subsection shall remain subject to these provisions even if its emissions later fall below the applicability threshold. (c) Compliance schedules. The owner or operator ofany source subject to this subsection shall submit a RACTcompliance plan approved by the Secretary, including a compliance schedule, to the Agency by November 15, 1993. The compliance schedule shall assure final compliance with subsection (3)(a) as expeditiously as practicable, but no later than May 31, 1995. (d) Exemptions. Any NOx emission unit required to meet the most stringent emission rate (MSER) in a construction permit containing specific emission limits is exempt fromthe requirements of Section 5-251(3) .

### 5-253.3 Bulk Gasoline Plants

(a) Applicability. (1) This subsection shall apply to any bulkgasoline plant with an average daily throughput of 3,000 gallons or greater calculated on a calendar month basis. Once a bulk gasoline plant is subject to this subsection, it shall remain so, even if its throughput later falls below the applicability threshold. Any bulkgasoline plant with a throughput which is below the threshold shall comply with the requirements of paragraphs (b)(3)(vii), (viii), (ix) and (d)(1)(i) only. (2) This subsection shall also apply to any bulkgasoline plant, regardless of its gasoline throughput, for which construction or reconstruction is commenced after January 1, 2001 . (b) Standards. (1) The owner or operator ofa bulk gasoline plant shall equip each gasoline storage tank with a submergedfill pipe and shall equip the bulkgasoline plant with a vapor balance systembetween thegasoline storage tank and the incoming gasoline tank truck . The lines shall be equipped with fittings that are vapor-tight and that automatically and immediately close upon disconnection. (2) The owner or operator ofa bulkgasoline plant shall equip the plant's loading rack(s) for submergedfill and shall equip the bulk gasoline plant with a vapor balance systembetween the gasoline storage tank and the outgoing gasoline tank truck . Thevapor balance systemshall be designed to prevent any vapors collected at one loading rack frompassing to another loading rack. The lines shall be equipped with fittings that are vapor-tight and that automatically and immediately close upon disconnection. (3) The owner or operator of a bulkgasoline plant required to maintain and operate a vapor balance systemunder this subsection shall ensure that the following procedures are complied with during gasoline loading and unloading operations and in the storage of gasoline: (i) The vapor balance systemshall be connected between the gasoline tank truck and the storage tank during all transfer operations and the connection shall be vapor-tight; (ii) All storage tank openings, including inspection hatches and gauging and sampling devices, shall be vapor-tight when not in use; (iii) The gasoline tank truck compartment hatch covers shall remain closed during the transfer of gasoline; (iv) The vapor balance systemshall be designed and operated at all times to prevent gauge pressure in the gasoline tank truck fromexceeding 18 inches (450 millimeters [mm]) of water and B-3vacuumfromexceeding 5.9 inches (150 mm) of water during

product transfer ; (v) No pressure vacuumreliefvalve in the bulk gasoline plant vapor balance systemshall begin to open at a systempressure of less than 18 inches (450 mm) ofwater or at a vacuumof less than 5.9 inches (150 mm) of water; (vi) All product transfers shall be limited to vapor-tight gasoline tank trucks or account trucks [for definition ofaccount truck see '5-253.5(b)] ; (vii) The filling of storage tanks shall be accomplished by submerged

fill only; (viii)The loading ofoutgoing gasoline tank trucks and account trucks [for definition ofaccount truck see '5-253.5(b)] shall be accomplished by submergedfill only; and (ix) The owner or operator of the gasoline bulk plant or the gasoline tank truck shall observe the entire transfer operation and shall discontinue transfer if any liquid or vapor leaks are observed. (c) Inspection and monitoring requirements . (1) The bulkgasoline plant owner or operator shall inspect the vapor balance systemand each loading rack every calendar month for liquid and vapor leaks during gasoline transfer operations. Detection methods using sight, sound, or smell are acceptable. Each leak detected shall be recorded and the source of the leak repaired within 15 calendar days after it is detected. (2) Apressure measurement device (liquid manometer, magnehelic gauge, or equivalent instrument) capable of measuring 20 in. of water gauge pressure within a + 0

.5 inches of water precision, shall be calibrated and installed on the bulkgasoline plant vapor balance systemat a pressure tap, located as close as possible to the connection with the gasoline tank truck, to allow determination of compliance with paragraph (b)(3)(iv) . (d) Record keeping. (1) The owner or operator ofa bulk gasoline plant which is subject to this subsection shall maintain the following records for a minimum of three years: (i) Daily records showing the quantity ofall gasoline transferred into gasoline tank trucks and account trucks [for definition ofaccount truck see '5-253.5(b)] . (ii) Arecord ofeach monthly leak inspection shall be kept on file at the plant. The inspection records shall include but are not limited to: (A) The date of inspection; (B) Findings, including a description of leaks found, if any; (C) Leak determination method;(D) Corrective action taken, including the date each leak

was repaired; and (E) The inspector's name and signature. (2) All records required under this subsection shall be made available for inspection during normal business hours and copies shall be provided to the Air Pollution Control Officer upon request. (e) Compliance. All bulk gasoline plants subject to this subsection shall comply with this subsection by July 1, 1994 or by the commencement of plant operation, whichever occurs later.Blank