Page 1 of 197

Subpart YY

— National Emission Standards for Hazardous Air Pollutants for Source Categories: Generic Maximum Achievable Control Technology Standards Table of Contents §63.1100 Applicability. §63.1101 Definitions. §63.1102 Compliance schedule. §63.1103 Source category

- specific applicability, definitions, and requirements. §6 3.1104 Process vents from continuous unit operations: applicability assessment procedures and methods. §63.1105 Transfer racks. §63.1106 Wastewater provisions. §63 .1107 Equipment leaks. §63.1108 Compliance with standards and operation and maintenance requirements. §63.1109 Recordkeeping requirements. §63.1110 Reporting requi rements. §63.1111 Startup, shutdown, and malfunction. §63.1112 Extension of compliance, and performance test, monitoring, recordkeeping and reporting waivers and alternatives. §63.1113 Procedures for approval of alternative means of emission limitation. §63.1114 Implementation and enforcement. Tables to Subpart YY of Part 63 Table 1 to §63.1100(a)

— Source Category MACT Applicability Table 1 to §63.1102

— Source Category Proposal and Effective Dates Table 1 to §63.1103(a)

— What Are My Requirements If I Own Or Operate An Acetal Resins Production Existing Or New Affected Source? Table 2 to §63.1103(b)(3)(i)

— What Are My Requirements if I Ow n or Operate an Acrylic and Modacrylic Fiber Production Existing or New Affected Source and Am Complying With Paragraph (b)(3)(i) of This Section? Table 3 to §63.1103(b)(3)(ii)

— What Are My Requirements If I Own Or Operate An Acrylic And Modacrylic Fiber Pr oduction ExistingPage 2 of 197

Or New Affected Source And Am Complying With Paragraph (b)(3)(ii) Of This Section? Table 4 to §63.1103(c)

— What Are My Requirements If I Own or Operate a Hydrogen Fluoride Production Existing or New Affected Source? Table 5 to §63.1103(d)

— What Are My Requirements If I Own or Operate A Polycarbonate Production Existing Affected Source? Table 6 to §63.1103(d)

— What are My Requirements If I Own or Operate a Polycarbonate Production New Affected Source? Table 7 to §63.1103(e)

— What Are My Requirements if I Own or Operate an Ethylene Production Existing or New Affected Source? Table 8 to §63.1103(f)

— What Are My Requirements if I Own or Operate a Carbon Black Production Existing or New Affected Source? Table 9 to §63.1103(g)

— What Are My Requi rements if I Own or Operate a Cyanide Chemicals Manufacturing Existing or New Affected Source? Table 10 to §63.1103(h)

— What Are My Requirements if I Own or Operate a Spandex Production Process Unit at a New or Existing Source? Table 1 of §63.1104(j)(1)

— Coe fficients for Total Resource Effectiveness §63.1100 Applicability. (a) General
. This subpart applies to source categories and affected sources specified in §63.1103(a) through (h). The affected emission points, by source category, are summarized in table 1 of this section. This table also delineates the section and paragraph of the rule that directs an owner or operator of an affected source to source category

- specific control, monitoring, recordkeeping, and reporting requirements. Table 1 to §63.1100(a) — Source Category MACT a ApplicabilityPage 3 of 197

Source category Storag

e vessel s Proces s vents Transfe r racks Equipmen

t leaks Wastewat

er streams Othe

r Source category MACT requiremen ts Acetal Resins Production Yes Yes No Yes Yes No §63.1103(a ) Acrylic and Modacrylic Fibers Production Yes Yes No Yes Yes Yes b §63.1103(b )

Carbon Black Production No Yes No No No No §63.1103(f ). Cyanide Chemicals Manufacturi ng Yes Yes Yes Yes Yes No §63.1103(g ).

Ethylene Production Yes Yes Yes Yes Yes Yes c §63.1103(e ). Hydrogen Fluoride Production Yes Yes Yes Yes No No §63.1103(c ) Polycarbona te Production Yes Yes No Yes Yes No §63.1103(d ) Spandex Production Yes Yes No No No Yes d §63.1103(h ).

a Maximum achievable control technology.

b Fiber spinning lines using spinning solution or suspension containing acrylonitrile.

c Heat exchange systems as defined in §63.1103(e)(2).

d Fiber spinning lines.Page 4 of 197

(b) Subpart A requirements
. The following provisions of subpart A of this part (General Provision s), §§63.1 through 63.5, and §§63.12 through 63.15, apply to owners or operators of affected sources subject to this subpart. (c) Research and development facilities
. The provisions of this subpart do not apply to research and development facilities, consi stent with section 112(b)(7) of the Act. (d) Primary product determination and applicability
. The primary product of a process unit shall be determined according to the procedures specified in paragraphs (d)(1) and (2) of this section. Paragraphs (d ) (3), ( 4), and (5) of this section discuss compliance for those process units operated as flexible operation units. (1) If a process unit only manufactures one product, then that product shall represent the primary product of the process unit. (2) If a process un it is designed and operated as a flexible operation unit, the primary product shall be determined as specified in paragraphs (d)(2)(i) or (ii) of this section based on the anticipated operations for the 5 years following the promulgation date for existing affected sources and for the first 5 years after initial startup for new affected sources. (i) If the flexible operation unit will manufacture one product for the greatest percentage of operating time over thePage 5 of 197

five

- year period, then that product shall repr esent the primary product of the flexible operation unit. (ii) If the flexible operation unit will manufacture multiple products equally based on operating time, then the product with the greatest production on a mass basis over the five

- year period shall represent the primary product of the flexible operation unit. (3) Once the primary product of a process unit has been determined to be a product produced by a source category subject to this subpart, the owner or operator of the affected source shall compl y with the standards for the primary product production process unit. (4) The determination of the primary product for a process unit, including the assessment of applicability of this subpart to process units that are designed and operated as flexible
ope ration units, shall be reported in the Notification of Compliance Status report required by §63.1110(a)(4) when the primary product is determined to be a product produced by a source category subject to requirements under this subpart. The Notification of Compliance Status shall include the information specified in either paragraph (d)(4)(i) or (ii) of this section. If the primary product is determined to be something other than a product produced by a source category subject to requirements under this subp art, the owner or operator shall retainPage 6 of 197

information, data, and analyses used to document the basis for the determination that the primary product is not produced by a source category subject to requirements under this subpart. (i) If the process unit manuf actures only one product subject to requirements under this subpart, the identity of that product. (ii) If the process unit is designed and operated as a flexible operation unit, the information specified in paragraphs (d)(4)(ii)(A) and (B) of this section , as appropriate. (A) The identity of the primary product. (B) Information concerning operating time and/or production mass for each product that was used to make the determination of the primary product under paragraph (d)(2)(i) or (ii) of this section. ( 5) When a flexible operation unit that is subject to this subpart is producing a product other than a product subject to this subpart, or is producing a product subject to this subpart that is not the primary product, the owner or operator shall comply wit h either paragraph (d)(5) (i) or (ii) of this section for each emission point. (i) The owner or operator shall control emissions during the production of all products in accordance with the requirements for the production of the primary product. As
appropr iate, the owner or operator shall demonstrate that thePage 7 of 197

parameter monitoring level established for the primary product is also appropriate for those periods when products other than the primary product are being produced. Documentation of this demonstration shall be submitted in the Notification of Compliance Status report required by §63.1110(a)(4). (ii) The owner or operator shall determine, for the production of each product, whether control is required in accordance with the applicable criteria for the p rimary product in §63.1103. If control is required, the owner or operator shall establish separate parameter monitoring levels, as appropriate, for the production of each product. The parameter monitoring levels developed shall be submitted in the Notifica tion of Compliance Status report required by §63.1110(a)(4). (e) Storage vessel ownership determination
. To determine the process unit to which a storage vessel shall belong, the owner or operator shall sequentially follow the procedures specified in parag raphs (e)(1) through (8) of this section, stopping as soon as the determination is made. (1) If a storage vessel is already subject to another subpart of this part on the date of promulgation for an affected source under the generic MACT, that storage vess el shall belong to the process unit subject to the other subpart. (2) If a storage vessel is dedicated to a single process unit, the storage vessel shall belong to that process unit.Page 8 of 197

(3) If a storage vessel is shared among process units, then the storage v essel shall belong to that process unit located on the same plant site as the storage vessel that has the greatest input into or output from the storage vessel (i.e., the process unit has the predominant use of the storage vessel.) (4) If predominant use cannot be determined for a storage vessel that is shared among process units and if only one of those process units is subject to this subpart, the storage vessel shall belong to that process unit. (5) If predominant use cannot be determined for a storage vessel that is shared among process units and if more than one of the process units are subject to standards under this subpart that have different primary products, then the owner or operator shall assign the storage vessel to any one of the process units sharing the storage vessel. (6) If the predominant use of a storage vessel varies from year to year, then predominant use shall be determined based on the utilization that occurred during the year preceding the date of promulgation of standards for an aff ected source under this subpart or based on the expected utilization for the 5 years following the promulgation date of standards for an affected source under this subpart for existing affected sources, whichever is more representative of the expected oper ations for that storage vessel, and based on the expected utilization forPage 9 of 197

the 5 years after initial startup for new affected sources. The determination of predominant use shall be reported in the Notification of Compliance Status Report required by §63.111 0(a)(4). If the predominant use changes, the redetermination of predominant use shall be reported in the next Periodic Report. (7) If the storage vessel begins receiving material from (or sending material to) another process unit; ceases to receive materia l from (or send material to) a process unit; or if the applicability of this subpart to a storage vessel has been determined according to the provisions of paragraphs (e)(1) through (6) of this section and there is a significant change in the use of the st orage vessel that could reasonably change the predominant use, the owner or operator shall reevaluate the applicability of this subpart to the storage vessel. (8) Where a storage vessel is located at a major source that includes one or more process units t hat place material into, or receive materials from, the storage vessel, but the storage vessel is located in a tank farm, the applicability of this subpart shall be determined according to the provisions in paragraphs (e)(8)(i) through (iii) of this sectio n. (i) The storage vessel may only be assigned to a process unit that utilizes the storage vessel and does not have an intervening storage vessel for that product (or raw material, asPage 10 of 197

appropriate). With respect to any process unit, an intervening storage v essel means a storage vessel connected by hard

- piping to the process unit and to the storage vessel in the tank farm so that product or raw material entering or leaving the process unit flows into (or from) the intervening storage vessel and does not flow directly into (or from) the storage vessel in the tank farm. (ii) If there is only one process unit at a major source that meets the criteria of paragraph (e)(8)(i) of this section with respect to a storage vessel, the storage vessel shall be assigned to t hat process unit. (iii) If there are two or more process units at the major source that meet the criteria of paragraph (e)(8)(i) of this section with respect to a storage vessel, the storage vessel shall be assigned to one of those process units according to the provisions of paragraph (e)(6) of this section. The predominant use shall be determined among only those process units that meet the criteria of paragraph (e)(8)(i) of this section. (f) Recovery operation equipment ownership determination
. To determ ine the process unit to which recovery equipment shall belong, the owner or operator shall sequentially follow the procedures specified in paragraphs (f)(1) through (7) of this section, stopping as soon as the determination is made.Page 11 of 197

(1) If recovery operati on equipment is already subject to another subpart of this part on the date standards are promulgated for an affected source, that recovery operation equipment shall belong to the process unit subject to the other subpart. (2) If recovery operation equipme nt is used exclusively by a single process unit, the recovery operation shall belong to that process unit. (3) If recovery operation equipment is shared among process units, then the recovery operation equipment shall belong to that process unit that has t he greatest input into or output from the recovery operation equipment (i.e., that process unit has the predominant use of the recovery operation equipment). (4) If predominant use cannot be determined for recovery operation equipment that is shared among process units and if one of those process units is a process unit subject to this subpart, the recovery operation equipment shall belong to the process unit subject to this subpart. (5) If predominant use cannot be determined for recovery operation equipme nt that is shared among process units and if more than one of the process units are process units that have different primary products and that are subject to this subpart, then the owner or operator shall assign the recovery operation equipment to any one of those process units.Page 12 of 197

(6) If the predominant use of recovery operation equipment varies from year to year, then the predominant use shall be determined based on the utilization that occurred during the year preceding the promulgation date of standards f or an affected source under this subpart or based on the expected utilization for the 5 years following the promulgation date for standards for an affected source under this subpart for existing affected sources, whichever is the more representative of the expected operations for the recovery operations equipment, and based on the expected utilization for the first 5 years after initial startup for new affected sources. This determination shall be reported in the Notification of Compliance Status Report req uired by §63.1110(a)(4). If the predominant use changes, the redetermination of predominant use shall be reported in the next Periodic Report. (7) If there is an unexpected change in the utilization of recovery operation equipment that could reasonably cha nge the predominant use, the owner or operator shall redetermine to which process unit the recovery operation belongs by reperforming the procedures specified in paragraphs (f)(2) through (6) of this section. (g) Overlap with other regulations
. Paragraphs (g)(1) through (6) of this section specify the applicability of this subpart YY emission point requirements when other rules mayPage 13 of 197

apply. Where subpart YY of this part allows an owner or operator an option to comply with one or another regulation to comply

w ith subpart YY of this part, an owner or operator must report which regulation they choose to comply with in the Notification of Compliance Status report required by §63.1110(a)(4). (1) Overlap of subpart YY with other regulations for storage vessels
. (i) After the compliance dates specified in §63.1102, a storage vessel subject to this subpart YY that is also subject to subpart G or CC of this part is required to comply only with the provisions of this subpart YY. (ii) After the compliance dates specified in §63.1102, a storage vessel that must be controlled according to the requirements of this subpart and subpart Ka or Kb of 40 CFR part 60 is required to comply only with the storage vessel requirements of this subpart. (2) Overlap of subpart YY with other regulations for process vents . (i) After the compliance dates specified in §63.1102, a process vent that must be controlled according to the requirements of this subpart and subpart G of this part is in compliance with this subpart if it complies with eit her set of requirements. The owner or operator must specify the rule with which they will comply in the Notification of Compliance Status report required by §63.1110(a)(4).Page 14 of 197

(ii) After the compliance dates specified in §63.1102, a process vent that must be controlled according to the requirements of this subpart and subpart III, RRR or NNN of 40 CFR part 60 is required to comply only with the process vent requirements of this subpart. (3) Overlap of this subpart YY with other regulations for transfer racks
. After the compliance dates specified in §63.1102, a transfer rack that must be controlled according to the requirements of this subpart YY and either subpart G of this part or subpart BB of 40 CFR part 61 is required to comply only with the transfer rack r equirements of this subpart YY. (4) Overlap of subpart YY with other regulations for equipment leaks
. (i) After the compliance dates specified in §63.1102, equipment that must be controlled according to this subpart and 40 CFR part 60, subpart VV, or 40 CF R part 61, subpart J or subpart V, is required only to comply with the equipment leak requirements of this subpart. (ii) After the compliance dates specified in §63.1102, equipment that must be controlled according to this subpart and subpart H of this par t is in compliance with the equipment leak requirements of this subpart if it complies with either set of requirements. The owner or operator must specify the rule with which they will comply in the Notification of Compliance Status report required by §63. 1110(a)(4).Page 15 of 197

(5) Overlap of subpart YY with other regulations for wastewater for source categories other than ethylene production
. (i) After the compliance dates specified in §63.1102 for an affected source subject to this subpart, a wastewater stream that is subject to the wastewater requirements of this subpart and the wastewater requirements of subparts F, G, and H of this part (collectively known as the “HON”) shall be deemed to be in compliance with the requirements of this subpart if it complies with e ither set of requirements. In any instance where a source subject to this subpart is colocated with a Synthetic Organic Chemical Manufacturing Industry (SOCMI) source, and a single wastewater treatment facility treats both Group 1 wastewaters and wastewate r residuals from the source subject to this subpart and wastewaters from the SOCMI source, a certification by the treatment facility that they will manage and treat the waste in conformity with the specific control requirements set forth in 40 CFR 63.133 t hrough 63.147 will also be deemed sufficient to satisfy the certification requirements for wastewater treatment under this subpart. (ii) After the compliance dates specified in §63.1102 for an affected source subject to this subpart, a wastewater stream th at is subject to control requirements in the Benzene Waste NESHAP (subpart FF of part 61 of this chapter) and this subpart is required to comply with both rules.Page 16 of 197

(6) Overlap of subpart YY with other regulations for waste for the ethylene production source category . (i) After the compliance date specified in §63.1102, a waste stream that is conveyed, stored, or treated in a wastewater stream management unit, waste management unit, or wastewater treatment system that receives streams subject to both the contr ol requirements of §63.1103(e)(3) for ethylene production sources and the provisions of §§63.133 through 63.147 shall comply as specified in paragraphs (g)(6)(i)(A) through (C) of this section. Compliance with the provisions of this paragraph (g)(6)(i) sha ll constitute compliance with the requirements of this subpart for that waste stream. (A) Comply with the provisions in §§63.133 through 63.137 and 63.140 for all equipment used in the storage and conveyance of the waste stream. (B) Comply with the provisions in §§63.1103(e), 63.138, and 63.139 for the treatment and control of the waste stream. (C) Comply with the provisions in §§63.143 through 63.148 for monitoring and inspections of equipment and for recordkeeping and reporting requirements. The ow ner or operator is not required to comply with the monitoring, recordkeeping, and reporting requirements associated with the treatment and control requirements in §§61.355 through 61.357.Page 17 of 197

(ii) After the compliance date specified in §63.1102, compliance wit h §63.1103(e) shall constitute compliance with the Benzene Waste Operations NESHAP (subpart FF of 40 CFR part 61) for waste streams that are subject to both the control requirements of §63.1103(e)(3) for ethylene production sources and the control requirem ents of 40 CFR part 61, subpart FF. (h) Affirmative defense for violation of emission standards during malfunction
. In response to an action to enforce the standards set forth in this subpart, the owner or operator of an acrylic and modacrylic fiber production affected source or polycarbonate production affected source may assert an affirmative defense to a claim for civil penalties for violations of such standards that are caused by malfunction, as defined at 40 CFR 63.2. Appropriate penalties may be assessed if the owner or operator fails to meet their burden of proving all of the requirements in the affirmative defense
. The affirmative defense shall not be available for claims for injunctive relief. (1) Assertion of affi rmative defense
. To establish the affirmative defense in any action to enforce such a standard, the owner or operator must timely meet the reporting requirements in paragraph (h)(2) of this section, and must prove by a preponderance of evidence that: (i) T he violation:Page 18 of 197

(A) Was caused by a sudden, infrequent, and unavoidable failure of air pollution control equipment, process equipment, or a process to operate in a normal or usual manner; and (B) Could not have been prevented through careful planning,
prop er design or better operation and maintenance practices; and (C) Did not stem from any activity or event that could have been foreseen and avoided, or planned for; and (D) Was not part of a recurring pattern indicative of inadequate design, operation, or maintenance; and (ii) Repairs were made as expeditiously as possible when a violation occurred; and (iii) The frequency, amount, and duration of the violation (including any bypass) were minimized to the maximum extent practicable; and (iv) If the violatio n resulted from a bypass of control equipment or a process, then the bypass was unavoidable to prevent loss of life, personal injury, or severe property damage; and (v) All possible steps were taken to minimize the impact of the violation on ambient air qu ality, the environment, and human health; and (vi) All emissions monitoring and control systems were kept in operation if at all possible, consistent with safety and good air pollution control practices; andPage 19 of 197

(vii) All of the actions in response to the viol ation were documented by properly signed, contemporaneous operating logs; and (viii) At all times, the affected source was operated in a manner consistent with good practices for minimizing emissions; and (ix) A written root cause analysis has been prepare d, the purpose of which is to determine, correct, and eliminate the primary causes of the malfunction and the violation resulting from the malfunction event at issue. The analysis shall also specify, using best monitoring methods and engineering judgment, the amount of any emissions that were the result of the malfunction. (2) Report . The owner or operator seeking to assert an affirmative defense shall submit a written report to the Administrator , with all necessary supporting documentation, that explains h ow it has met the requirements set forth in paragraph (h)(1) of this section
. This affirmative defense report shall be included in the first periodic compliance report, deviation report, or excess emission report otherwise required after the initial occurr ence of the violation of the relevant standard (which may be the end of any applicable averaging period). If such compliance report, deviation report, or excess emission report is due less than 45 days after the initial occurrence ofPage 20 of 197

the violation, the aff irmative defense report may be included in the second compliance report, deviation report, or excess emission report due after the initial occurrence of the violation of the relevant standard. §63.1101 Definitions. All terms used in this subpart shall have the meaning given them in the Act, in 40 CFR 63.2 (General Provisions), and in this section. The definitions in this section do not apply to waste requirements for ethylene production sources. Affirmative defense means, in the context of an enforcement proceeding, a response or defense put forward by a defendant, regarding which the defendant has the burden of proof, and the merits of which are independently and objectively evaluated in a judicial or administrativ e proceeding. Annual average concentration , as used in the wastewater provisions, means the flow

- weighted annual average concentration, as determined according to the procedures specified in §63.144(b). Annual average flow rate , as used in the wastewater
p rovisions, means the annual average flow rate, as determined according to the procedures specified in §63.144(c). Batch cycle refers to manufacturing a product from start to finish in a batch unit operation.Page 21 of 197

Batch emission episode means a discrete venting episode that may be associated with a single unit operation. A unit operation may have more than one batch emission episode per batch cycle. For example, a displacement of vapor resulting from the charging of a vessel with organic HAP will result in a disc rete emission episode. If the vessel is then heated, there may also be another discrete emission episode resulting from the expulsion of expanded vapor. Both emission episodes may occur during the same batch cycle in the same vessel or unit operation. Ther e are possibly other emission episodes that may occur from the vessel or other process equipment, depending on process operations. Batch unit operation means a unit operation involving intermittent or discontinuous feed into equipment and, in general, invo lves the emptying of equipment after the batch cycle ceases and prior to beginning a new batch cycle. Mass, temperature, concentration and other properties of the process may vary with time. Addition of raw material and withdrawal of product do not simulta neously occur in a batch unit operation. Bottoms receiver means a tank that collects distillation bottoms before the stream is sent for storage or for further downstream processing. By compound means by individual stream components, not carbon equivalents.Page 22 of 197

Capacity means the volume of liquid that is capable of being stored in a storage vessel, determined by multiplying the vessel's internal cross

- sectional area by the internal height of the shell. Closed vent system means a system that is not open to the
at mosphere and is composed of piping, ductwork, connections, and, if necessary, flow inducing devices that transport gas or vapor from an emission point to a control device. A closed vent system does not include the vapor collection system that is part of an y tank truck or railcar or the loading arm or hose that is used for vapor return. For transfer racks, the closed vent system begins at, and includes, the first block valve on the downstream side of the loading arm or hose used to convey displaced vapors.
C ombined vent stream means a process vent that is comprised of at least one gas stream from a batch unit operation manifolded with at least one gas stream from a continuous unit operation. Compliance equipment means monitoring equipment used by an

owner or operator of an affected source under this subpart to demonstrate compliance with an operation or emission limit standard. Continuous parameter monitoring system or CPMS means the total equipment that may be required to meet the dataPage 23 of 197

acquisition and availab ility requirements of this subpart, and that is used to sample, condition (if applicable), analyze, and provide a record of process or control system parameters. Continuous unit operation means a unit operation where the inputs and outputs flow continuousl y. Continuous unit operations typically approach steady

- state conditions. Continuous unit operations typically involve the simultaneous addition of raw material and withdrawal of the product. Control device means, with the exceptions noted below, a combust ion device, recovery device, recapture device, or any combination of these devices used to comply with this subpart or a referencing subpart. For process vents from continuous unit operations at affected sources in source categories where the applicability criteria includes a TRE index value, recovery devices are not considered to be control devices. Primary condensers on steam strippers or fuel gas systems are not considered to be control devices. Day means a calendar day. Distillate receiver means overhea d receivers, overhead accumulators, reflux drums, and condenser(s) including ejector condenser(s) associated with a distillation unit. Distillation unit means a device or vessel in which one or more feed streams are separated into two or more exit streams, each exit stream having component concentrations different fromPage 24 of 197

those in the feed stream(s). The separation is achieved by the redistribution of the components between the liquid and the vapor phases by vaporization and condensation as they approach equil ibrium within the distillation unit. Distillation unit includes the distillate receiver, reboiler, and any associated vacuum pump or steam jet. Emission point means an individual process vent, storage vessel, transfer rack, wastewater stream, kiln, fiber s pinning line, equipment leak, or other point where a gaseous stream is released. Equipment means each of the following that is subject to control under this subpart: pump, compressor, agitator, pressure relief device, sampling collection system, open

- ended valve or line, valve, connector, instrumentation system in organic hazardous air pollutant service as defined in §63.1103 for the applicable process unit, whose primary product is a product produced by a source category subject to this subpart. Equivalent method means any method of sampling and analysis for an air pollutant that has been demonstrated to the Administrator's satisfaction to have a consistent and quantitatively known relationship to the reference method, under specified conditions. Excess emi ssions means emissions in excess of those that would have occurred if there were no start

- up, shutdown, orPage 25 of 197

malfunction and the owner or operator complied with the relevant provisions of this subpart. Final recovery device means the last recovery device on a process vent stream from a continuous unit operation at an affected source in a source category where the applicability criteria includes a TRE index value. The final recovery device usually discharges to a combustion device, recapture device, or directl y to the atmosphere. Flexible operation unit means a process unit that manufactures different chemical products periodically by alternating raw materials or operating conditions. Fuel gas means gases that are combusted to derive useful work or heat. Fuel g as system means the offsite and onsite piping and flow and pressure control system that gathers gaseous stream(s) generated by onsite operations, may blend them with other sources of gas, and transports the gaseous stream for use as a fuel gas in combustio n devices or in

- process combustion equipment, such as furnaces and gas turbines, either singly or in combination. Group 1 wastewater stream means a process wastewater stream at an existing or new source that meets the criteria for Group 1 status in §63.132 (c).Page 26 of 197

Group 2 wastewater stream means a process wastewater stream that does not meet the definition of a Group 1 wastewater
stream. Halogens and hydrogen halides means hydrogen chloride (HCl), chlorine (Cl2), hydrogen bromide (HBr), bromine (Br2), and hydro gen fluoride (HF). Impurity means a substance that is produced coincidentally with the primary product, or is present in a raw material. An impurity does not serve a useful purpose in the production or use of the primary product and is not isolated. Initia l startup means, for new sources, the first time the source begins production. For additions or changes not defined as a new source by this subpart, initial startup means the first time additional or changed equipment is put into operation. Initial startup does not include operation solely for testing equipment. Initial startup does not include subsequent startup (as defined in this section) of process units following malfunctions or process unit shutdowns. Except for equipment leaks, initial startup also d oes not include subsequent startups (as defined in this section) of process units following changes in product for flexible operation units or following recharging of equipment in batch unit operations.Page 27 of 197

Low throughput transfer rack means a transfer rack th at transfers less than a total of 11.8 million liters per year of liquid containing regulated HAP. Maintenance wastewater means wastewater generated by the draining of process fluid from components in the process unit, whose primary product is a product pr oduced by a source category subject to this subpart, into an individual drain system prior to or during maintenance activities. Maintenance wastewater can be generated during planned and unplanned shutdowns and during periods not associated with a shutdown . Examples of activities that can generate maintenance wastewaters include descaling of heat exchanger tubing bundles, cleaning of distillation column traps, draining of low legs and high point bleeds, draining of pumps into an individual drain system, and draining of portions of the process unit, whose primary product is a product produced by a source category subject to this subpart, for repair. Malfunction means any sudden, infrequent, and not reasonably preventable failure of air pollution control equip ment, process equipment, or a process to operate in a normal or usual manner which causes, or has the potential to cause, the emission limitations in an applicable standard to be exceeded. Failures that are caused in part by poor maintenance or careless op eration are not malfunctions.Page 28 of 197

Maximum true vapor pressure means the equilibrium partial pressure exerted by the total organic HAP in the stored or transferred liquid at the temperature equal to the highest calendar

- month average of the liquid storage or tr ansfer temperature for liquids stored or transferred above or below the ambient temperature or at the local maximum monthly average temperature as reported by the National Weather Service for liquids stored or transferred at the ambient temperature, as det ermined: (1) In accordance with methods described in American Petroleum Institute Publication 2517, Evaporation Loss From External Floating

- Roof Tanks (incorporated by reference as specified in §63.14 of subpart A of this part); or (2) As obtained from standard reference texts; or (3) As determined by the American Society for Testing and Materials Method D2879

– 83 (incorporated by reference as specified in §63.14 of subpart A of this part); or (4) Any other method approved by the Administrator. Oil

- water separator or organic

- water separator means a waste management unit, generally a tank used to separate oil or organics from water. An oil

- water or organic

- water separator consists of not only the separation unit but also the forebay and other separator basi ns, skimmers, weirs, grit chambers, sludge hoppers, and bar screens that are located directly afterPage 29 of 197

the individual drain system and prior to additional waste management units such as an air flotation unit, clarifier, or biological treatment unit. Examples of an oil

- water or organic

water separator include, but are not limited to, an American Petroleum Institute separator, parallel

- plate interceptor, and corrugated

- plate interceptor with the associated ancillary equipment.
On

- site means, with respect to reco rds required to be maintained by this subpart, a location within a plant site that encompasses the affected source. On

- site includes, but is not limited to, the affected source to which the records pertain, or central files elsewhere at the plant site. Org anic hazardous air pollutant or organic HAP means any organic chemicals that are also HAP. Permitting authority means one of the following: (1) The State air pollution control agency, local agency, other State agency, or other agency authorized by the Admi nistrator to carry out a permit program under part 70 of this chapter; or (2) The Administrator, in the case of EPA

- implemented permit programs under title V of the Act (42 U.S.C. 7661) and part 71 of this chapter. Plant site means all contiguous or adjoin ing property that is under common control, including properties that are separatedPage 30 of 197

only by a road or other public right

- of

- way. Common control includes properties that are owned, leased, or operated by the same entity, parent entity, subsidiary, or any com bination thereof. Point of determination means each point where process wastewater exits the process unit, whose primary product is a product produced by a source category subject to this subpart. Note to definition for point of determination: The regulati on allows determination of the characteristics of a wastewater stream at the point of determination or downstream of the point of determination if corrections are made for changes in flow rate and annual average concentration of Table 9 compounds (as defin ed under this subpart) as determined in §63.144. Such changes include losses by air emissions, reduction of annual average concentration or changes in flow rate by mixing with other water or wastewater streams, and reduction in flow rate or annual average concentration by treating or otherwise handling the wastewater stream to remove or destroy hazardous air pollutants. Pressure release means the emission of materials resulting from the system pressure being greater than the set pressure of the pressure relief device. This release can be one release or a series of releases over a short time period due to a malfunction in the process.Page 31 of 197

Pressure relief device or valve means a safety device used to prevent operating pressures from exceeding the maximum allowa ble working pressure of the process equipment. A common pressure relief device is a spring

- loaded pressure relief valve. Devices that are actuated either by a pressure of less than or equal to 2.5 pounds per square inch gauge or by a vacuum are not
pressur e relief devices. Process condenser means a condenser whose primary purpose is to recover material as an integral part of a process. The condenser must support a vapor

- to

- liquid phase change for periods of source equipment operation that are above the boil ing or bubble point of substance(s). Examples of process condensers include distillation condensers, reflux condensers, process condensers in line prior to the vacuum source, and process condensers used in stripping or flashing operations. Process unit mea ns the equipment assembled and connected by pipes or ducts to process raw and/or intermediate materials and to manufacture an intended product. A process unit includes more than one unit operation. Process unit shutdown means a work practice or operational procedure that stops production from a process unit, or part of a process unit during which practice or procedure it is technically feasible to clear process material from the process unit, or part of the process unit, consistent with safetyPage 32 of 197

constraints a nd during which repairs can be effected. The following are not considered process unit shutdowns: (1) An unscheduled work practice or operational procedure that stops production from a process unit, or part of a process unit, for less than 24 hours. (2) An unscheduled work practice or operational procedure that would stop production from a process unit, or part of a process unit, for a shorter period of time than would be required to clear the process unit, or part of the process unit, of materials and star t up the unit and result in greater emissions than delay of repair of leaking components until the next scheduled process unit shutdown. (3) The use of spare equipment and technically feasible bypassing of equipment without stopping production.
Process ven t means the point of discharge to the atmosphere (or the point of entry into a control device, if any) of a gas stream from a unit operation within a source category subject to this subpart. Process vent excludes the following gas stream discharges: (1) Re lief valve discharges; (2) Leaks from equipment subject to this subpart; (3) Gas streams exiting a control device complying with this subpart;Page 33 of 197

(4) Gas streams transferred to other processes (on

- site or off

- site) for reaction or other use in another process (i.e., for chemical value as a product, isolated intermediate, byproduct, or co

- product for heat value); (5) Gas streams transferred for fuel value ( i.e. , net positive heating value), use, reuse, or sale for fuel value,

use, or reuse; (6) Gas streams from storage vessels or transfer racks subject to this subpart; (7) Gas streams from waste management units subject to this subpart; (8) Gas streams from wastewater streams subject to this subpart; (9) Gas streams exiting process analyzers; and (10) Gas stream discharges that contain less than or equal to 0.005 weight

- percent total organic HAP.
Process wastewater means wastewater which, during manufacturing or processing, comes into direct contact with or results from the production or use of any raw material, intermediate product, finished product, by

- product, or waste product. Examples are product tank drawdown or feed tank drawdown, water formed during a chemical reaction or used as a reactant, water used to wash impurities from organic products or reactants, equipment washes between batches in a batch process,Page 34 of 197

water used to cool or quench organic vapor streams through direct contact, and condensed steam from jet ejector systems pulling vacuum on vessels containing organics.
Process wastewater stream means a s tream that contains process wastewater. Product means a compound or chemical which is manufactured as the intended product of the applicable production process unit as defined in §63.1103. By

- products, isolated intermediates, impurities, wastes, and trace contaminants are not considered products. Recapture device means an individual unit of equipment capable of and used for the purpose of recovering chemicals, but not normally for use, reuse, or sale. For example, a recapture device may recover chemicals pr imarily for disposal. Recapture devices include, but are not limited to, absorbers, carbon adsorbers, and condensers. For purposes of the monitoring, recordkeeping, and reporting requirements of this subpart, recapture devices are considered recovery devic es. Recovery device means an individual unit of equipment capable of and normally used for the purpose of recovering chemicals for fuel value (i.e., net positive heating value), use, reuse, or for sale for fuel value. Examples of equipment that may be reco very devices include absorbers, carbon adsorbers, condensers, oil

- water separators or organic

- waterPage 35 of 197

separators, or organic removal devices such as decanters, strippers, or thin

- film evaporation units. For purposes of the monitoring, recordkeeping, and repo rting requirements of this subpart, recapture devices are considered recovery devices. Research and development facility means laboratory and pilot plant operations whose primary purpose is to conduct research and development into new processes and product s, where the operations are under the close supervision of technically trained personnel, and is not engaged in the manufacture of products for commercial sale, except in a de minimis manner. Shutdown means the cessation of operation of an affected

source or equipment that is used to comply with this subpart, or the emptying and degassing of a storage vessel. For the purposes of this subpart, shutdown includes, but is not limited to, periodic maintenance, replacement of equipment, or repair. Shutdown does n ot include the routine rinsing or washing of equipment in batch operation between batches. Shutdown includes the decoking of ethylene production unit furnaces. Startup means the setting into operation of a regulated source and/or equipment required or used to comply with this subpart. Startup includes initial startup, operation solely for testing equipment, the recharging of equipment in batch operation, and transitional conditions due to changes in product for flexible operation units.Page 36 of 197

Storage vessel or ta nk , for the purposes of regulation under the storage vessel provisions of this subpart, means a stationary unit that is constructed primarily of nonearthen materials (such as wood, concrete, steel, fiberglass, or plastic) that provides structural support and is designed to hold an accumulation of liquids or other materials. Storage vessel includes surge control vessels and bottoms receiver vessels. For the p urposes of regulation under the storage vessel provisions of this subpart, storage vessel does not include vessels permanently attached to motor vehicles such as trucks, railcars, barges, or ships; pressure vessels designed to operate in excess of 204.9 ki lopascals and without emissions to the atmosphere; or wastewater storage vessels. Wastewater storage vessels are covered under the wastewater provisions of §63.1106. Subsequent startup means any setting into operation of a regulated source and/or equipment required or used to comply with this subpart following the initial startup. Surge control vessel means a feed drum, recycle drum, or intermediate vessel. Surge control vessels are used within a process unit (as defined in this subpart) when in

- process sto rage, mixing, or management of flow rates or volumes is needed to assist in production of a product. Table 9 compounds means compounds listed in Table 9 of subpart G of this part.Page 37 of 197

Total organic compounds or (TOC) means the total gaseous organic compounds ( minus methane and ethane) in a vent stream, with the concentrations expressed on a carbon basis. Total resource effectiveness index value or TRE index value means a measure of the supplemental total resource requirement per unit reduction of organic HAP as sociated with a process vent stream, based on vent stream flow rate, emission rate of organic HAP, net heating value, and corrosion properties (whether or not the vent stream contains halogenated compounds), as quantified by the equations given under §63.1 104(j). Transfer rack means a single system used to fill bulk cargo tanks mounted on or in a truck or railcar. A transfer rack includes all loading arms, pumps, meters, shutoff valves, relief valves, and other piping and equipment necessary for the transfe r operation. Transfer equipment and operations that are physically separate (i.e., do not share common piping, valves, and other equipment) are considered to be separate transfer racks. Unit operation means distinct equipment used in processing, among othe r things, to prepare reactants, facilitate reactions, separate and purify products, and recycle materials. Equipment used for these purposes includes, but is not limited to, reactors, distillation columns, extraction columns, absorbers, decanters, dryers, condensers, and filtration equipment.Page 38 of 197

Vapor balancing system means a piping system that is designed to collect organic HAP vapors displaced from tank trucks or railcars during loading; and to route the collected organic HAP vapors to the storage vessel fro m which the liquid being loaded originated, or to compress collected organic HAP vapors and commingle with the raw feed of a production process unit.
Wastewater is either a process wastewater or a maintenance wastewater and means water that: (1) Contains e ither: (i) An annual average concentration of Table 9 compounds (as defined under this subpart) of at least 5 parts per million by weight at the point of determination and has an annual average flow rate of 0.02 liter per minute or greater, or (ii) An annu al average concentration of Table 9 compounds (as defined under this subpart) of at least 10,000 parts per million by weight at the point of determination at any flow rate, and that (2) Is discarded from a process unit, whose primary product is a product p roduced by a source category subject to this subpart.
Wastewater stream means a stream that contains wastewater. §63.1102 Compliance schedule.Page 39 of 197

(a) General requirements
. Affected sources, as defined in §63.1103(a)(1)(i) for acetyl resins production, §63.1103(b)(1)(i) for acrylic and modacrylic fiber production, §63.1103(c)(1)(i) for hydrogen fluoride production, §63.1103(d)(1)(i) for polycarbonate production, §63.1103(e)(1)(i) for ethylene production, §63.1103(f)(1)(i) for carbon black production, §63 .1103(g)(1)(i) for cyanide chemicals manufacturing, or §63.1103(h)(1)(i) for spandex production shall comply with the appropriate provisions of this subpart and the subparts referenced by this subpart according to the schedule in paragraph (a)(1) or (2) of this section, as appropriate , except as provided in paragraph (b) of this section . Proposal and effective dates are specified in Table 1 to this section. (1) Compliance dates for new and reconstructed sources
. (i) The owner or operator of a new or reconst ructed affected source that commences construction or reconstruction after the proposal date, and that has an initial startup before the effective date of standards for an affected source, shall comply with this subpart no later than the applicable effecti ve date in Table 1 to §63.1102 of this section. (ii) The owner or operator of a new or reconstructed affected source that has an initial startup after the applicable effective date in Table 1 to §63.1102 of this section shall comply with this subpart upon startup of the source.Page 40 of 197

(iii) The owner or operator of an affected source that commences construction or reconstruction after the proposal date, but before the effective date in Table 1 to this section, shall comply with this subpart no later than the date 3 years after the effective date if the conditions in paragraphs (a)(1)(iii) (A) and (B) of this section are met. (A) The promulgated standards are more stringent than the proposed standards. (B) The owner or operator complies with this subpart as proposed during the 3

- year period immediately after the effective date of standards for the affected source. (2) Compliance dates for existing sources
. (i) The owner or operator of an existing affected source shall comply with the requirements of this subpart with in 3 years after the effective date of standards for the affected source. (ii) The owner or operator of an area source that increases its emissions of (or its potential to emit) HAP such that the source becomes a major source shall be subject to the releva nt standards for existing sources under this subpart. Such sources shall comply with the relevant standards within 3 years of becoming a major source. (b) All acrylic and modacrylic fiber production affected sources and polycarbonate production affected so urces that commenced construction or reconstruction on or before [INSERTPage 41 of 197

DATE OF PUBLICATION IN THE FEDERAL REGISTER] , shall be in compliance with the pressure relief device monitoring requirements of § 63.1107(e)(3) upon initial startup or 3 years after the effective date of the final amendments, whichever is later, and the equipment leaks requirements of 40 CFR part 63, subpart UU upon initial startup or 1 year after the effective date of the final amen dments, whichever is later. New acrylic and modacrylic fiber production affected sources and polycarbonate production affected sources that commence construction or reconstruction after [INSERT DATE OF PUBLICATION
IN THE FEDERAL REGISTER] , shall be in comp liance with the pressure relief device monitoring requirements of § 63.1107(e)(3) upon initial startup or by the effective date of the final amendments, whichever is later [Reserved]
. Table 1 to §63.1102 — Source Category Proposal and Effective Dates

Source category Proposal date Effective date (a) Acetal Resins Production October 14, 1998 June 29,

1999. (b) Acrylic and Modacrylic Fibers Production October 14, 1998 June 29,

1999. (c) Hydrogen Fluoride Production October 14, 1998 June 29,

1999. (d) Polycarbonate Production October 14, 1998 June 29,

1999. (e) Ethylene Production December 6, 2000 July 12,

2002. (f) Carbon Black Production December 6, July 12,Page 42 of 197 2000 2002. (g) Cyanide Chemicals Manufacturing December 6, 2000 July 12,

2002. (h) Spandex Production December 6, 2000 July 12,

2002. §63.1103 Source category - specific applicability, definitions, and requirements. (a) Acetal resins production applicability, definitions, and requirements

— (1) Applicability

— (i) Affected source
. For the acetal r esins production source category (as defined in paragraph (a)(2) of this section), the affected source shall comprise all emission points, in combination, listed in paragraphs (a)(1)(i)(A) through (D) of this section, that are associated with an acetal res ins production process unit located at a major source, as defined in section 112(a) of the Clean Air Act (Act). (A) All storage vessels that store liquids containing organic HAP. For purposes of regulation, surge control vessels and bottoms receivers that are located as part of the process train prior to the polymer reactor are to be regulated under the front

- end process vent provisions. (B) All process vents from continuous unit operations (front end process vents and back end process vents).Page 43 of 197

(C) All wastewater streams associated with the acetal resins production process unit as defined in (a)(2) of this section. (D) Equipment (as defined in §63.1101 of this subpart) that contains or contacts organic HAP. (ii) Compliance schedule
. The compliance schedu le for affected sources as defined in paragraph (a)(1)(i) of this section is specified in §63.1102(a). (2) Definitions
. Acetal resins production means the production of homopolymers and/or copolymers of alternating oxymethylene units. Acetal resins are als o known as polyoxymethylenes, polyacetals, and aldehyde resins. Acetal resins are generally produced by polymerizing formaldehyde (HCHO) with the methylene functional group (CH 2 ) and are characterized by repeating oxymethylene units (CH 2 O) in the polymer b ackbone. Back end process vent means any process vent from a continuous unit operation that is not a front end process vent up to the final separation of raw materials and by

- products from the stabilized polymer. Front end process vent means any process ve nt from a continuous unit operation involved in the purification of formaldehyde feedstock for use in the acetal homopolymerPage 44 of 197

process. All front end process vents are restricted to those vents that occur prior to the polymer reactor. (3) Requirements
. Table 1 of this section specifies the acetal resins production standards applicability for existing and new sources. Applicability assessment procedures and methods are specified in §§63.1104 through 63.1107. An owner or operator of an affected source is not re quired to perform tests, TRE calculations or other applicability assessment procedures if they opt to comply with the most stringent requirements for an applicable emission point pursuant to this subpart. General compliance, recordkeeping, and reporting re quirements are specified in §§63.1108 through 63.1112. Procedures for approval of alternative means of emission limitations are specified in §63.1113. The owner or operator must control organic HAP emissions from each affected source emission point by meet ing the applicable requirements specified in table 1 of this section. Table 1 to §63.1103(a) — What Are My Requirements If I Own Or Operate An Acetal Resins Production Existing Or New Affected Source? If you own or operate. . . And if. . . Then you must. .
. 1. A storage vessel with: 34 cubic meters < capacity The maximum true vapor pressure of organic HAP > 17.1 kilopascals (for existing sources) or > 11.7 a. Reduce emissions of total organic HAP by 95 weight

percent by venting emissions through a closed vent system to any combination of control devices meeting thePage 45 of 197 kilopascals (for new sources) requirements of subpart SS (national emission standards for closed vent systems, control devic es, recovery devices, and routing to a fuel gas system or a process), as specified in §63.982(a)(1) (storage vessel requirements) of this part; or b. Comply with the requirements of subpart WW (national emission standards for storage vessels (control l evel 2)) of this part. 2. A front end process vent from continuous unit operations a. Reduce emissions of total organic HAP by using a flare meeting the requirements of subpart SS of this part; or b. Reduce emissions of total organic HAP by 60 weight

percent, or reduce TOC to a concentration of 20 parts per million by volume, whichever is less stringent, by venting emissions through a closed vent system to any combination of control devices meeting the requirements of subpart SS, as specified in §63.9 82(a)(2) (process vent requirements) of this part. 3. A back end process vent from continuous unit operations The vent stream has a TRE a < 1.0 a. Reduce emissions of total organic HAP by using a flare meeting the requirements of subpart SS of this part; or b. Reduce emissions of total organic HAP by 98 weight

percent, or reduce TOC to a concentration of 20 parts per million by volume, whichever is less stringent, by venting emissions through a closedPage 46 of 197 vent system to any combination of control devices mee ting the requirements of subpart SS, as specified in §63.982(a)(2) (process vent requirements) of this part; or c. Achieve and maintain a TRE index value greater than 1.0. 4. A back end process vent from continuous unit operations 1.0 ≤ TRE a ≤ 4.0 Moni tor and keep records of equipment operating parameters specified to be monitored under subpart SS, §§63.990(c)(absorber, condenser, and carbon adsorber monitoring) or 63.995(c) (other noncombustion systems used as a control device monitoring) of this part. 5. Equipment as defined under §63.1101 The equipment contains or contacts ≥ 10 weight

- percent organic HAP b , and operates ≤ 300 hours per year Comply with the requirements of subpart TT (national emission standards for equipment leaks (control level 1)) or subpart UU (national emission standards for equipment leaks (control level 2)) of this part. 6. An acetal resins production process unit that generates process wastewater The process wastewater stream is a Group 1 or Group 2 wastewater stream Comply wi th the requirements of §63.1106(a).

7. An acetal resins production process unit that generates maintenance wastewater The maintenance wastewater contains organic HAP Comply with the requirements of §63.1106(b).

8. An item of The item of Comply with the requirementsPage 47 of 197

equipment listed in §63.1106( c)(1) equipment meets the criteria specified in §63.1106(c)(1) through (3) and either (c)(4)(i) or (ii) in Table 35 of subpart G of this part.

a The TRE is determined according to the procedures specified in §63.11 04(j).

b The weight

- percent organic HAP is determined for equipment according to procedures specified in §63.1107. (b) Acrylic and modacrylic fiber production applicability, definitions, and requirements

— (1) Applicability

— (i) Affected

source . For the acrylic fibers and modacrylic fibers production (as defined in paragraph (b)(2) of this section) source category, the affected source shall comprise all emission points, in combination, listed in paragraphs (b)(1)(i)(A) through (E) of this section, that ar e associated with a suspension or solution polymerization process unit that produces acrylic and modacrylic fiber located at a major source as defined in section 112(a) of the Act. (A) All storage vessels that store liquid containing acrylonitrile or organ ic HAP. (B) All process vents from continuous unit operations. (C) All wastewater streams associated with the acrylic and modacrylic fibers production process unit as defined in (b)(2) of this section.Page 48 of 197

(D) Equipment (as defined in §63.1101 of this subpart) that contains or contacts acrylonitrile or organic HAP. (E) All acrylic and modacrylic fiber spinning lines using a spinning solution or suspension having organic acrylonitrile or organic HAP. For the purposes of implementing this paragraph, a spinning li ne includes the spinning solution filters, spin bath, and the equipment used downstream of the spin bath to wash, dry, or draw the spun fiber. (ii) Compliance schedule
. The compliance schedule, for affected sources as defined in paragraph (b)(1)(i) of this section, is specified in §63.1102 (a
. (2) Definitions
. Acrylic fiber means a manufactured synthetic fiber in which the fiber

- forming substance is any long

- chain synthetic polymer composed of at least 85 percent by weight of acrylonitrile units. Acrylic and modacrylic fibers production means the production of either of the following synthetic fibers composed of acrylonitrile units: (i) Acrylic fiber. (ii) Modacrylic fiber. Acrylonitrile solution polymerization means a process where acrylonitrile and comonomers are dissolved in a solvent to form a polymer solution (typically polyacrylonitrile). ThePage 49 of 197

polyacrylonitrile is soluble in the solvent. In contrast to suspension polymerization, the resulting reactor polymer solution (spin dope) is filtered and pu mped directly to the fiber spinning process. Acrylonitrile suspension polymerization means a polymerization process where small drops of acrylonitrile and comonomers are suspended in water in the presence of a catalyst where they polymerize under agitation . Solid beads of polymer are formed in this suspension reaction which are subsequently filtered, washed, refiltered, and dried. The beads must be subsequently redissolved in a solvent to create a spin dope prior to introduction to the fiber spinning proces s. Fiber spinning line means the group of equipment and process vents associated with acrylic or modacrylic fiber spinning operations. The fiber spinning line includes (as applicable to the type of spinning process used) the blending and dissolving tanks, spinning solution filters, wet spinning units, spin bath tanks, and the equipment used downstream of the spin bath to wash, dry, or draw the spun fiber. Modacrylic fiber means a manufactured synthetic fiber in which the fiber

- forming substance is any long

- chain synthetic polymer composed of at least 35 percent by weight of acrylonitrile units but less than 85 percent by weight of acrylonitrile units.Page 50 of 197

Seal means, for the purpose of complying with the requirements of § 63.1033(b) of subpart UU of this part, t hat instrument monitoring of the open

- ended valve or line conducted according to the method specified in § 63.1023(b) and, as applicable, § 63.1023(c) of subpart UU of this part , indicates

no readings of 500 parts per million or greater. Spin dope means th e liquid mixture of polymer and solvent that is fed to the spinneret to form the acrylic and modacrylic fibers. (3) Requirements
. An owner or operator of an affected source must comply with the requirements of paragraph (b)(3)(i) or (ii) of this section. ( i) Table 2 of this section specifies the acrylic and modacrylic fiber production source category control requirement applicability for both existing and new sources. Applicability assessment procedures and methods are specified in §§63.1104 through 63.1107 . An owner or operator of an affected source is not required to perform tests, or other applicability assessment procedures if they opt to comply with the most stringent requirements for an applicable emission point pursuant to this subpart. General compli ance, recordkeeping, and reporting requirements are specified in §§63.1108 through 63.1112. Procedures for approval of alternative means of emission limitations are specified in §63.1113. The owner or operatorPage 51 of 197

must control organic HAP emissions from each a ffected source emission point by meeting the applicable requirements specified in table 2 of this section. Table 2 to §63.1103(b)(3)(i) — What Are My Requirements if I Own or Operate an Acrylic and Modacrylic Fiber Production Existing or New Affected Source and Am Complying With Paragraph (b)(3)(i) of This Section? If you own or operate... And if... Then you must... 1. A storage vessel The stored material is acrylonitrile a. Reduce emissions of acrylonitrile by 98 weight

percent by venting emissions through a closed vent system to any combination of control device meeting the requirements of subpart SS (national emission standards for closed vent systems, control devices, recovery devices, and routing to a fuel gas system or a process), as specified in §63.9 82(a)(1) (storage vessel requirements) of this part, or 95 weight

percent or greater by venting through a closed vent system to a recovery device meeting the requirements of subpart SS (national emission standards for closed vent systems, control devices, recovery devices, and routing to a fuel gas system or a process), §63.993 (recovery device requirements) of this part; or b. Comply with the requirements of subpart WW (national emission standards for storage vessels (control level 2)) of this part. 2. A process vent The vent steam a. Reduce emissions ofPage 52 of 197

from continuous unit operations (halogenated) has a mass emission rate of halogen atoms contained in organic compounds ≥0.45 kilograms per hour a and an acrylonitrile concentration ≥50 parts per million by volume b and an ave rage flow rate ≥0.005 cubic meters per minute acrylonitrile or TOC as specified for nonhalogenated process vents from continuous unit operations (other than by using a flare) by venting emissions through a closed vent system to a hal ogen reduction device meeting the requirements of subpart SS, §63.994 (halogen reduction devices requirements) of this part that reduces hydrogen halides and halogens by 99 weight

- percent or to less than 0.45 kilograms per year, whichever is less stringent ; or b. Reduce the process vent halogen atom mass emission rate to less than 0.45 kilograms per hour by venting emissions through a closed vent system to a halogen reduction device meeting the requirements of subpart SS, §63.994 (halogen reduction devi ces requirements) of this part and then complying with the requirements specified for process vents from continuous unit operations (nonhalogenated). 3. A process vent from continuous unit operations (nonhalogenated) The vent steam has a mass emission rat e of halogen atoms contained in organic compounds <0.45 kilograms per hour a , and an acrylonitrile concentration ≥50 parts per million by a. Reduce emissions of acrylonitrile by using a flare m eeting the requirements of subpart SS, §63.987 (flare requirements) of this part or b. Reduce emissions of acrylonitrile by 98 weight

percent, or reduce TOC to a concentration of 20 parts per million by volume, whichever is less stringent, by venting emiss ions through a closed vent system to any combinationPage 53 of 197 volume b and an average flow rate ≥0.005 cubic meters per minute of control devices meeting the requirements of subpart SS (national emission standards for closed vent systems, control devices, recovery devices, and routing to a fuel gas system or a process), as speci fied in §63.982(a)(2) (process vent requirements) of this part. 4. A fiber spinning line that is a new or reconstructed source The lines use a spin dope produced from either a suspension polymerization process or solution polymerization process , a. Reduce acrylonitrile emissions by 85 weight

- percent or more. (For example, by you may enclos e ing the spinning and washing areas of the spinning line (as specified in paragraph (b)(4) of this section) and vent ing through a closed vent system and us e ing any combination of control devices meeting the requirements of subpart SS, as specified in §63.982(a), of this part
. ); or b. Reduce acrylonitrile emissions from the spinning line to less than or equal to 0.25 kilograms of acrylonitrile per megagram (0 .5 pounds of acrylonitrile per ton) of acrylic and modacrylic fiber produced; or c. Reduce the AN acrylonitrile concentration of the spin dope to less than 100 ppmw. 5. A fiber spinning line that is an existing source The spinning line uses a spin dop e produced from a solution polymerization process Reduce organic HAP emissions from the spinning line to less than or equal to 20 kilograms of organic HAP per megagram (40 pounds of organic HAP per ton) of acrylic and modacrylic fiber produced. Maintain rec ords and report emissions as specified in §§63.1109Page 54 of 197 through 63.1110. Control of spinning line AN emissions is not required 6. A fiber spinning line that is an existing source The spinning line uses a spin dope produced from a suspension polymerization process a. Reduce the AN acrylonitrile concentration of the spin dope to less than 100 ppmw b , ; or

b. Reduce acrylonitrile emissions from the spinning line to less than or equal to 0. 0 25 kilograms of acrylonitrile per megagram of acrylic and modacrylic fiber produced. 7. Equipment as defined under §63.1101 ( with the differences for pressure relief devices described in item 11 below ) It contains or contacts ≥10 weight

- percent acrylonitrile c , and operates ≥300 hours per year For connectors in gas and vap or service and in light liquid service, comply with either § 63.1008 of subpart TT (national emission standards for equipment leaks (control level 1)) of this part, or § 63.1027 of subpart UU (national emission standards for equipment leaks (control level 2)) of this part. For all other applicable equipment, c C omply with the requirements of subpart TT (national emission standards for equipment leaks (control level 1)) or subpart UU (national emission standards for equipment leaks (control level 2)) of this part , except § 63.1030
. 8. An acrylic and modacrylic fiber production process unit that generates process wastewater The process wastewater stream is a Group 1 or Group 2 wastewater stream Comply with the requirements of §63.1106(a).Page 55 of 197

9. An acrylic and modacrylic fiber production process unit that generates maintenance wastewater The maintenance wastewater contains organic HAP Comply with the requirements of §63.1106(b).

10. An item of equipment listed in §63.1106(c)(1) The item of equipment meets the c riteria specified in §63.1106(c)(1) through (3) and either (c)(4)(i) or (ii) Comply with the requirements in Table 35 of subpart G of this part.

11. Pressure relief devices The pressure relief device is in organic HAP service Comply with § 63. 1107(e).

a The mass emission rate of halogen atoms contained in organic compounds is determined according to the procedures specified in §63.1104(i).

b The percent by weight organic HAP is determined according to the procedures specified in §63.1107.

c The weight

- percent organic HAP is determined for equipment according to procedures specified in §63.1107. (ii) The owner or operator must control organic HAP emissions from the acrylic and modacrylic fibers production facility by meeting the applicable requi rements specified in table 3 of this section. The owner or operator must determine the facility acrylonitrile emission rate using the procedures specified in paragraph (b)(5) of this section. Applicability assessment procedures and methods are specified in §§63.1104 through 63.1107. An owner or operator of an affected source doesPage 56 of 197

not have to perform tests, TRE calculations or other applicability assessment procedures if they opt to comply with the most stringent requirements for an applicable emission point pursuant to this subpart. General compliance, recordkeeping, and reporting requirements are specified in §§63.1108 through 63.1112. Procedures for approval of alternative means of emission limitations are specified in §63.1113. Table 3 to §63.1103(b)(3)(i i) — What Are My Requirements If I Own Or Operate An Acrylic And Modacrylic Fiber Production Existing Or New Affected Source And Am Complying With Paragraph (b)(3)(ii) Of This Section?

If you own or operate... Then you must control total organic HAP emissio ns from the affected source by... 1. An acrylic and modacrylic fibers production affected source and your facility is an existing source Meeting all of following requirements: a. Reduce total acrylonitrile emissions from all affected storage vessels, proc ess vents, wastewater streams associated with the acrylic and modacrylic fibers production process unit as defined in paragraph (b)(2) of this section, and fiber spinning lines operated in your acrylic and modacrylic fibers production facility to less than or equal to 0.5 kilograms (kg) of acrylonitrile per megagram (Mg) of fiber produced. b. Determine the facility acrylonitrile emission rate in accordance with the requirements specified in paragraph (b)(5) of this section.Page 57 of 197

2. An acrylic and modacrylic fibers production affected source and your facility is a new source Meeting all of following requirements: a. Reduce total acrylonitrile emissions from all affected storage vessels, process vents, wastewater streams associated with the acrylic and modacryl ic fibers production process unit as defined in paragraph (b)(2) of this section, and fiber spinning lines operated in your acrylic and modacrylic fibers production facility to less than or equal to 0.25 kilograms (kg) of acrylonitrile per megagram (Mg) of fiber produced. b. Determine the facility acrylonitrile emission rate in accordance with the requirements specified in paragraph (b)(5) of this section. 3. Equipment as defined under §63.1101 and it contains or contacts > 10 weight

- percent acrylonitri le, a and operates > 300 hours per year (with the differences for pressure relief devices described in item 4 below) For connectors in gas and vapor service and in light liquid service, comply with either § 63.1008 of subpart TT (national emission standards for equipment leaks (control level 1)) of this part, or § 63.1027 of subpart UU (national emission standards for equipment leaks (control level 2)) of this part. For all other applicable equipment, c Meeting either of the following standards for equipment leaks: a. Comply with subpart TT of this part; or b. C omply with subpart UU of this part , except § 63.1030
. 4. A pressure relief device i n organic HAP service Complying with § 63.1107(e).Page 58 of 197

a The weight

- percent organic HAP is determined for equipment according to procedures specified in §63.1107. (4) Fiber spinning line enclosure requirements
. For an owner or operator of a new or modified source electing to comply with paragraph (b)(3)(i) of this section, the fiber spinning line enclosure must be designed and operated to meet the requirements specified in paragraphs (b)(4)(i) through (iv) of this section. (i) The enclosure must cover the spinning and washing areas of the spinning line. (ii) The en closure must be designed and operated in accordance with the criteria for a permanent total enclosure as specified in “Procedure T

— Criteria for and Verification of a Permanent or Temporary Total Enclosure” in 40 CFR 52.741, appendix B. (iii) The enclosure may have permanent or temporary openings to allow worker access; passage of material into or out of the enclosure by conveyor, vehicles, or other mechanical means; entry of permanent mechanical or electrical equipment; or to direct airflow into the enclosu re. (iv) The owner or operator must perform the verification procedure for the enclosure as specified in section 5.0 to “Procedure T

— Criteria for and Verification of a Permanent orPage 59 of 197

Temporary Total Enclosure” initially when the enclosure is first installed and, thereafter, annually. (5) Facility acrylonitrile emission rate determination
. For an owner or operator electing to comply with paragraph (b)(3)(ii) of this section, the facility acrylonitrile emission rate must be determined using the requirements spe cified in paragraphs (b)(5)(i) through (iii) of this section. (i) The owner or operator must prepare an initial determination of the facility acrylonitrile emission rate. (ii) Whenever changes to the acrylic or modacrylic fiber production operations at the facility could potentially cause the facility acrylonitrile emission rate to exceed the applicable limit of kilogram of acrylonitrile per Megagram of fiber produced, the owner or operator must prepare a new determination of the facility acrylonitrile emis sion rate. (iii) For each determination, the owner or operator must prepare and maintain at the facility site sufficient process data, emissions data, and any other documentation necessary to support the facility acrylonitrile emission rate calculation. (c ) Hydrogen fluoride production applicability, definitions, and requirements

— (1) Applicability

— (i) Affected

source — For the hydrogen fluoride production (as defined in paragraph (c)(2) of this section) source category, the affected source shall comprise al l emission points, in combination,Page 60 of 197

listed in paragraphs (c)(1)(i)(A) through (D) of this section, that are associated with a hydrogen fluoride production process unit located at a major source as defined in section 112(a) of the Act. (A) All storage vessel s used to accumulate or store hydrogen fluoride. (B) All process vents from continuous unit operations associated with hydrogen fluoride recovery and refining operations. These process vents include vents on condensers, distillation units, and water scrubb ers. (C) All transfer racks used to load hydrogen fluoride into tank trucks or railcars. (D) Equipment in hydrogen fluoride service (as defined in paragraph (c)(2) of this section). (ii) Compliance schedule
. The compliance schedule, for affected sources as defined in paragraph (c)(1)(i) of this section, is specified in §63.1102(a). (2) Definitions
. Connector means flanged, screwed, or other joined fittings used to connect two pipelines or a pipeline and a piece of equipment. A common connector is a flange. Joined fittings welded completely around the circumference of the interface are not considered connectors for the purposes of this subpart.Page 61 of 197

Equipment means each pump, compressor, agitator, pressure relief device, sampling connection system, open

- ended valv e or line, valve, connector, and instrumentation system in hydrogen fluoride service; and any control devices or closed

- vent systems used to comply with this subpart. Hydrogen fluoride production means a process engaged in the production and recovery of hy drogen fluoride by reacting calcium fluoride with sulfuric acid. For the purpose of implementing this subpart, hydrogen fluoride production is not a process that produces gaseous hydrogen fluoride for direct reaction with hydrated aluminum to form aluminum fluoride (i.e., the hydrogen fluoride is not recovered as an intermediate or final product prior to reacting with the hydrated aluminum). In hydrogen fluoride service means that a piece of equipment either contains or contacts a hydrogen fluoride
process fluid (liquid or gas). In vacuum service means that equipment is operating at an internal pressure which is at least 5 kilopascals below ambient
pressure. Instrumentation system means a group of equipment components used to condition and convey a sample of the process fluid to analyzers and instruments for the purpose of determining process operating conditions (e.g., composition, pressure, flow, etc.). Valves and connectors are the predominantPage 62 of 197

type of equipment used in instrumentation systems; however, oth er types of equipment may also be included in these systems. Kiln seal means the mechanical or hydraulic seals at both ends of the kiln, designed to prevent the infiltration of moisture and air through the interface of the rotating kiln and stationary pipe s and equipment attached to the kiln during normal vacuum operation of the kiln (operation at an internal pressure of at least 0.25 kilopascal [one inch of water] below ambient pressure). Leakless pump means a pump whose seals are submerged in liquid, a ma gnetically

- driven pump, a pump equipped with a dual mechanical seal system that includes a barrier fluid system, a canned pump, or other pump that is designed with no externally actuated shaft penetrating the pump housing. Open

- ended valve or line means an y valve, except relief valves, having one side of the valve seat in contact with process fluid and one side open to the atmosphere, either directly or through open piping. Pressure release means the emission of materials resulting from the system pressure being greater than the set pressure of the relief device. This release can be one release or a series of releases over a short time period due to a malfunction in the
process.Page 63 of 197

Pressure relief device or valve means a safety device used to prevent operating pressures from exceeding the maximum allowable working pressure of the process equipment. A common pressure relief device is a spring

- loaded pressure relief valve. Devices that are actuated either by a pressure of less than or equal to 2.5 pounds per squar e inch gauge or by a vacuum are not pressure relief devices. Relief device or valve means a valve used only to release an unplanned, nonroutine discharge. A relief valve discharge can result from an operator error, a malfunction such as a power failure or equipment failure, or other unexpected cause that requires immediate venting of gas from process equipment in order to avoid safety hazards or equipment damage. Repaired for the purpose of this regulation means equipment is adjusted, or otherwise altered, to eliminate a leak identified by sensory monitoring. Sampling connection system means an assembly of equipment within a process unit or affected facility used during periods of representative operation to take samples of the process fluid. Equipment used to take nonroutine grab samples is not considered a sampling connection system.
S ensory monitoring means the detection of a potential leak to the atmosphere by walk

- through visual, audible, or olfactoryPage 64 of 197

monitoring. Comprehensive component

- by

- component inspection is not required. Shift means the time a shift operator normally works, typ ically 8 or 12 hours. (3) Requirements
. Table 4 of this section specifies the hydrogen fluoride production source category applicability and control requirements for both existing and new sources. The owner or operator must control hydrogen fluoride emissi ons from each affected source emission point as specified in table 4. General compliance, recordkeeping, and reporting requirements are specified in §§63.1108 through 63.1112. Specific monitoring, recordkeeping, and reporting requirements are specified in table 4. Minimization of emissions from startups, shutdowns, and malfunctions, including those resulting from kiln seals must be addressed in the startup, shutdown, and malfunction plan required by §63.1111; the plan must also establish reporting and

recor dkeeping of such events. Procedures for approval of alternative means of emission limitations are specified in §63.1113. Table 4 to §63.1103(c) — What Are My Requirements If I Own or Operate a Hydrogen Fluoride Production Existing or New Affected Source?

If you own or operate . . . And if . . . Then you must . . . 1. A storage vessel The stored

material is Reduce emissions of hydrogen fluoride by venting displacementPage 65 of 197 hydrogen fluoride emissions created by normal filling or emptying activities through a closed

- vent system to a recovery system or wet scrubber that is designed and operated to achieve a 99 weight

percent removal efficiency. The minimum liquid flow rate to the scrubber that achieves a 99 weight

- percent removal efficiency shall be established, and may be done so by design analysis. The liquid flow rate to the scrubber shall be continuously monitored and records maintained according to §§63.996 and 63.998(b), (c), and (d)(3) of 40 CFR subpart SS of this part. The Periodic Report specified in §63.1110(a)(5) of this subpart shall include the information specified in §63.999(c) of 40 CFR subpart SS of this part, as applicable. 2. A process vent from continuous unit operations The vent stream is

from hydrogen fluoride recovery and refining vessels Reduce emissions of hydrogen fluoride from the process vent by venting emissions through a closed

- vent system to a wet scrubber that is designed and operated to achieve a 99 weight

percent removal efficiency. Monitoring, recordkeeping, and reporting of wet scrubber operation shall be in accordance with the requirements stated above for a wet scrubber controlling hydrogen fluoride emissions from a storage vessel. 3. A transfer rack The tran sfer rack

is associated with bulk hydrogen fluoride liquid loading into tank trucks and rail cars Reduce emissions of hydrogen fluoride by venting emissions through a closed

- vent system to a recovery system or wet scrubber that is designed and operated to achieve a 99 weight

percent removal efficiency.Page 66 of 197 Monitoring, recordkeeping, and reporting of wet scrubber operation shall be in accordance with the requirements stated above for a wet scrubber controlling HF emissions from a storage vessel. You also must lo ad hydrogen fluoride into only tank trucks and railcars that have a current certification in accordance with the U.S. DOT pressure test requirements of 49 CFR part 180 for tank trucks and 49 CFR 173.31 for railcars; or have been demonstrated to be vapor - ti ght (i.e. will sustain a pressure change of not more than 750 Pascals within 5 minutes after it is pressurized to a minimum or 4,500 Pascals) within the preceding 12 months. 4. Equipment It is in hydrogen

fluoride service and operates ≥ 300 hours per year and is not in vacuum service Control hydrogen fluoride emissions by using leakless pumps and by implementing a sensory monitoring leak detection program. Equipment that is excluded from sensory monitoring because it operates less than 300 hours per year o r is in vacuum service shall be identified by list, location, or other method and the identity shall be recorded. An owner or operator is required to perform sensory monitoring at least once every shift, but no later than within 15 days. When a leak is det ected, repair must begin within one hour and be completed as soon as practical. A record shall be kept of each leak detected and repaired including: equipment identification number, date and time the leak was detected and that repair was initiated, and the date ofPage 67 of 197 successful repair. (d) Polycarbonate production applicability, definitions, and requirements

— (1) Applicability

— (i) Affected source
. For the polycarbonate production (as defined in paragraph (d)(2) of this section) source category, the affected source shall comprise all emission points, in combination, listed in paragraphs (d)(1)(i)(A) through (D) of this section, that are part of a polycarbonate production process unit located at a major source as defined in section 112(a) of the Act. For the pu rposes of this rule, a polycarbonate production process unit is a unit that produces polycarbonate by interfacial polymerization from bisphenols and phosgene. Phosgene production units that are associated with polycarbonate production process units are

con sidered to be part of the polycarbonate production process. A phosgene production unit consists of the reactor in which phosgene is formed and all equipment (listed in paragraphs (d)(1)(i)(A) through (D) of this section) downstream of the reactor that prov ides phosgene for the production of polycarbonate. Therefore, for the purposes of this rule, such a phosgene production unit is considered to be a polycarbonate production process unit. (A) All storage vessels that store liquids containing organic HAP.Page 68 of 197

(B) All process vents from continuous and batch unit operations. (C) All wastewater streams. (D) Equipment (as defined in §63.1101 of this subpart) that contains or contacts organic HAP. (ii) Compliance schedule
. The compliance schedule, for affected sources as defined in paragraph (d)(1)(i) of this section, is specified in §63.1102 (a)
. (2) Definitions
. Polycarbonate production means a process engaged in the production of a special class of polyester formed from any dihydroxy compound and any carbonate diester or by ester exchange. Polycarbonate may be produced by solution or emulsion polymerization, although other methods may be used. A typical method for the manufacture of polycarbonate includes the reaction of bisphenol

- A with phosgene in the presence of
pyr idine or other catalyst to form polycarbonate. Methylene chloride or other solvents are used in this polymerization reaction. Seal means, for the purpose of complying with the requirements of § 63.1033(b) of subpart UU of this part, that instrument monitor ing of the open

- ended valve or line conducted according to the method specified in § 63.1023(b) and, asPage 69 of 197

applicable, § 63.1023(c) of subpart UU of this part , indicates

no readings of 500 parts per million or greater. (3) Requirements
. Tables 5 and 6 of this section specify the applicability criteria and standards for existing and new sources within the polycarbonate production source category. The owner or operator must control organic HAP emissions from each affected source emission point by meeting the app licable requirements specified in tables 5 and 6. Applicability assessment procedures and methods are specified in §§63.1104 through 63.1107. An owner or operator of an affected source is not required to perform tests, TRE calculations or other applicabili ty assessment procedures if they opt to comply with the most stringent requirements for an applicable emission point pursuant to this subpart. General compliance, recordkeeping, and reporting requirements are specified in §§63.1108 through 63.1112. Procedu res for approval of alternative means of emission limitations are specified in §63.1113. Table 5 to §63.1103(d) — What Are My Requirements If I Own or Operate A Polycarbonate Production Existing Affected Source? If you own or operate... And if... Then you must... 1. A storage vessel with: 75 cubic meters ≤ capacity < 151 cubic meters 27.6 kilopascals ≤ maximum true vapor pressure of total organic HAP < 76.6 kilopascals Reduce emissions of total organic HAP by 95 weight

percent by venting emissions through a closed vent system to any combination of control devices meeting thePage 70 of 197 requirements of subpart SS (national emission standards for closed vent systems, control devices, recovery devices, and routing to a fuel gas system or a process), as specified in §63.982(a)(1) (storage vessel requirements) of this part; or comply with the requirements of subpart WW (national emission standards for storage vessels (control level 2)) o f this part. 2. A storage vessel with: 151 cubic meters ≤ capacity The maximum true vapor pressure of total organic HAP ≥ 5.2 kilopascals Reduce emissions of total organic HAP by 98 weight

percent by venting emissions through a closed vent system to any c ombination of control devices meeting the requirements of subpart SS, as specified in §63.982(a)(1) (storage vessel requirements) of this part 3. A storage vessel with: 75 cubic meters ≤ capacity < 151 cubic meters The maximum true vapor pressure of total organic HAP ≥ 76.6 kilopascals Reduce emissions of total organic HAP by 95 weight

percent by venting emissions through a closed vent system to any combination of control devices meeting the requirements of subpart SS, as specified in §63.982(a)(1) (storag e vessel requirements) of this part. 4. A process vent from continuous unit operations or a combined vent stream a The vent stream has a TRE b,c ≤ 2.7 a. Reduce emissions of total organic HAP by 98 weight

- percent; or reduce total organic HAP to a concentrati on of 20 partsPage 71 of 197 per million by volume; whichever is less stringent, by venting emissions through a closed vent system to any combination of control devices meeting the requirements of subpart SS, as specified in §63.982(a)(2) (process vent requirements) of this part and vent emissions through a closed vent system to a halogen reduction device meeting the requirements of subpart SS, §63.994, of this part, that reduces hydrogen halides and halogens by 99 weight

- percent or to less than 0.45 kilograms per hour d , whichever is less stringent; or b. Reduce the process vent halogen atom mass emission rate to less than 0.45 kilograms per hour by venting emissions through a closed vent system to a halogen reduction device meeting the requirements of subpart SS, §63.994 (halogen reduction device requir ements) of this part and reduce emissions of total organic HAP by 98 weight

- percent; or reduce total organic HAP or TOC to a concentration of 20 parts per million by volume; whichever is less stringent, by venting emissions through a closed vent system toPage 72 of 197 any combination of control devices meeting the requirements of subpart SS, as specified in §63.982(a)(2) (process vent requirements) of this part; or c. Achieve and maintain a TRE index value greater than 2.7. 5. A process vent from continuous unit op erations or a combined vent stream a 2.7 < TRE b,c ≤ 4.0 Monitor and keep records of equipment operating parameters specified to be monitored under subpart SS, §§63.990(c) (absorber, condenser, and carbon adsorber monitoring) or 63.995(c) (other noncombustion systems used as a control device monitoring) of this part. 6. Equipment as defined under §63.1101 ( with the differences for pressure relief devices described in item 10 below ) The equipment contains or contacts ≥ 5 weight

- percent total organic HAP e , and operates ≥ 300 hours per year For connectors in gas and vapor service and in light liquid service, comply with either § 63.1008 of subpart TT (national emission standards for equipment leaks (control level 1)) of this part, or § 63.1027 of subpart UU (nati onal emission standards for equipment leaks (control level 2)) of this part. For all other applicable equipment, c C omply with the requirements of subpart TT (national emission standards for equipment leaks (control level 1)) or subpart UU (national emissio n standards for equipmentPage 73 of 197 leaks (control level 2)) of this part , except § 63.1030
. 7. A polycarbonate production process unit that generates process wastewater The process wastewater stream is a Group 1 or a Group 2 wastewater stream Comply with the requirements of §63.1106(a).

8. A polycarbonate production process unit that generates maintenance wastewater The maintenance wastewater contains organic HAP Comply with the requirements of §63.1106(b).

9. An item of equipment listed in §63.1106(c)(1) Th e item of equipment meets the criteria specified in §63.1106(c)(1) through (3) and either (c)(4)(i) or (ii) Comply with the requirements in Table 35 of subpart G of this part.

10. Pressure relief devices The pressure relief device is in organic HAP service Comply with § 63. 1107(e).

a Combined vent streams shall use the applicability determination procedures and methods for process vents from continuous unit operations (§63.1104).

b The TRE equation coefficients for halogenated streams (table 1 of §63.1104(j)(1)) shall be used to calculate the TRE index value.

c The TRE is determined according to the procedures specified in §63.1104(j). If a dryer is manifolded with such vents, and the v ent is routed to a recovery, recapture, or combustion device, then the TRE index value for the vent must be calculated based on the properties of the vent stream (including the contributions of the dryer). If a dryer is manifolded with other vents and not routed to a recovery, recapture, or combustion device, then the TRE index value must be calculated excluding the contributions of the dryer. The TRE index value for the dryer must be calculated separately in this case.Page 74 of 197

d The mass emission rate of halogen a toms contained in organic compounds is determined according to the procedures specified in §63.1104(i).

e The weight

- percent organic HAP is determined for equipment according to procedures specified in §63.1107. Table 6 to §63.1103(d) — What are My Requirem ents If I Own or Operate a Polycarbonate Production New Affected Source? If you own or operate. . . And if. . . Then you must. . . 1. A storage vessel with: 38 cubic meters ≤capacity <151 cubic meters 13.1 kilopascals ≤maximum true vapor pressure of total organic HAP <76.6 kilopascals a. Reduce emissions of total organic HAP by 95 weight

percent by venting emissions through a closed vent system to any combination of control devices meeting the requirements of subpart SS (national emission standards fo r closed vent systems, control devices, recovery devices, and routing to a fuel gas system or a process), as specified in §63.982(a)(1) (storage vessel requirements) of this part; or b. Comply with the requirements of subpart WW (national emission standard s for storage vessels (control level 2)) of this part. 2. A storage vessel with: 151 cubic meters ≤capacity The maximum true vapor pressure of total organic HAP is ≥5.2 kilopascals Reduce emissions of total organic HAP by 98 weight

percent by venting emis sions through a closed vent system to any combination of control devices meeting the requirements of subpart SS, as specified in §63.982(a)(1) (storage vessel requirements) of this part. 3. A storage The maximum true Reduce emissions of totalPage 75 of 197

vessel with: 38 cubic meters ≤capacity <151 cubic meter s vapor pressure of total organic HAP is ≥76.6 kilopascals organic HAP by 95 weight

percent by venting emissions through a closed vent system to any combination of control devices meeting the requirements of subpa rt SS, as specified in §63.982(a)(1) (storage vessel requirements) of this part. 4. A process vent from continuous unit operations or a combined vent stream a The vent stream has a TRE b,c ≤9.6 a. Reduce emissions of total organic HAP by 98 weight

percent; o r reduce total organic HAP to a concentration of 20 parts per million by volume; whichever is less stringent, by venting emissions through a closed vent system to any combination of control devices meeting the requirements of subpart SS, as specified in §6 3.982(a)(2) (process vent requirements) of this part; and Vent emissions through a closed vent system to a halogen reduction device meeting the requirements of subpart SS, §63.994, of this part that reduces hydrogen halides and halogens by 99 weight

- percen t or to less than 0.45 kilograms per hourd, d , whichever is less stringent; or b. Reduce the process vent halogen atom mass emission rate to less than 0.45 kilograms per hour by venting emissions through a closed vent system to a halogen reduction device me eting the requirements of subpart SS, §63.994 (halogen reduction devicePage 76 of 197 requirements) of this part; and Reduce emissions of total organic HAP by 98 weight

- percent; or reduce total organic HAP or TOC to a concentration of 20 parts per million by volume; whi chever is less stringent, by venting emissions through a closed vent system to any combination of control devices meeting the requirements of subpart SS, as specified in §63.982(a)(2) (process vent requirements) of this part; or c. Achieve and maintain a T RE index value greater than 9.6. 5. Equipment as defined under §63.1101 (with the differences for pressure relief devices described in item 6 below) The equipment contains or contacts ≥ 5 weight

- percent total organic HPA e , and operates ≥ 300 hours per yea r For connectors in gas and vapor service and in light liquid service, comply with either § 63.1008 of subpart TT (national emission standards for equipment leaks (control level 1)) of this part, or § 63.1027 of subpart UU ((national emission standards for equipment leaks (control level 2)) of this part. For all other applicable equipment, c C omply with the requirements of subpart TT (national emission standards for equipment leaks (control level 1)) or subpart UU (national emission standards for equipment l eaks (control level 2)) of this part , except § 63.1030
. 6. Pressure relief devices The pressure relief device is in organic HAP Comply with § 63.1107(e).Page 77 of 197 service

a Combined vent streams shall use the applicability determination procedures and methods for process vents from continuous unit operations (§63.1104).

b The TRE equation coefficients for halogenated streams (Table 1 of §63.1104(j)(1) of this subpart) shall be used t o calculate the TRE index value.

c The TRE is determined according to the procedures specified in §63.1104(j). If a dryer is manifolded with such vents, and the vent is routed to a recovery, recapture, or combustion device, then the TRE index value for the vent must be calculated based on the properties of the vent stream (including the contributions of the dryer). If a dryer is manifolded with other vents and not routed to a recovery, recapture, or combustion device, then the TRE index value must be calcul ated excluding the contributions of the dryer. The TRE index value for the dryer must be calculated separately in this case.

d The mass emission rate of halogen atoms contained in organic compounds is determined according to the procedures specified in §63 .1104(i).

e The weight

- percent organic HAP is determined for equipment according to procedures specified in §63.1107. (e) Ethylene production applicability, definitions, and requirements

— (1) Applicability

— (i) Affected source
. For the ethylene production (as defined in paragraph (e)(2) of this section) source category, the affected source shall comprise all emission points listed in paragraphs (e)(1)(i) (A) through (G) of this section that are associated with an ethylene production unit that is located at a major source, as defined in section 112(a) of the Act. (A) All storage vessels (as defined in §63.1101) that store liquids containing organic HAP.Page 78 of 197

(B) All ethylene process vents (as defined in paragraph (e)(2) of this section) from continuous unit operat ions. (C) All transfer racks (as defined in paragraph (e)(2) of this section) that load HAP

- containing material. (D) Equipment (as defined in §63.1101) that contains or contacts organic HAP. (E) All waste streams (as defined in paragraph (e)(2) of this sec tion) associated with an ethylene production unit. (F) All heat exchange systems (as defined in paragraph (e)(2) of this section) associated with an ethylene production unit. (G) All ethylene cracking furnaces and associated decoking operations. (ii) Excep tions
. The emission points listed in paragraphs (e)(1)(ii) (A) through (L) of this section are in the ethylene production source category but are not subject to the requirements of paragraph (e)(3) of this section. (A) Equipment that is located within an e thylene production unit that is subject to this subpart but does not contain organic HAP. (B) Stormwater from segregated sewers. (C) Water from fire

- fighting and deluge systems in segregated sewers. (D) Spills.Page 79 of 197

(E) Water from safety showers. (F) Water from testing of fire

- fighting and deluge systems. (G) Vessels storing organic liquids that contain organic HAP as impurities. (H) Transfer racks, loading arms, or loading hoses that only transfer liquids containing organic HAP as impurities. (I) Transfer racks , loading arms, or loading hoses that vapor balance during all transfer operations. (J) Air emissions from all ethylene cracking furnaces, including emissions during decoking operations. (K) Pressure vessels designed to operate in excess of 204.9 kilopasca ls and without emissions to the atmosphere. (L) Vessels permanently attached to motor vehicles such as trucks, railcars, barges, or ships. (iii) Exclusions
. The provisions of this subpart do not apply to process units and emission points subject to subpart s F, G, H, I and CC of this part. (iv) Compliance schedule
. The compliance schedule for the ethylene production source category is specified in §63.1102. (2) Definitions
. Ethylene process vent means a gas stream with a flow rate greater than 0.005 standard cubic meters per minute containing greater than 20 parts per million by volume HAP that is continuously discharged during operation of an ethylene production unit, as defined in this section. EthylenePage 80 of 197

process vents are gas streams that are discharged to t he atmosphere (or the point of entry into a control device, if any) either directly or after passing through one or more recovery devices. Ethylene process vents do not include relief valve discharges; gaseous streams routed to a fuel gas system; leaks fro m equipment regulated under this subpart; episodic or nonroutine releases such as those associated with startup, shutdown, and malfunction; and in situ sampling systems (online analyzers). Ethylene production or production unit means a chemical manufacturi ng process unit in which ethylene and/or propylene are produced by separation from petroleum refining process streams or by subjecting hydrocarbons to high temperatures in the presence of steam. The ethylene production unit includes the separation of ethyl ene and/or propylene from associated streams
such as a C 4 product, pyrolysis gasoline, and pyrolysis fuel oil. Ethylene production does not include the manufacture of SOCMI chemicals such as the production of butadiene from the C 4 stream and aromatics from pyrolysis gasoline. Heat exchange system means any cooling tower system or

once - through cooling water system (e.g., river or pond water). A heat exchange system can include an entire recirculating or

once - through cooling system.Page 81 of 197

Organic HAP means the compo unds listed in Table 1 to subpart XX of this part. Transfer rack means the collection of loading arms and loading hoses at a single loading rack that is used to fill tank trucks and/or railcars with organic HAP. Transfer rack includes the associated pumps, meters, shutoff valves, relief valves, and other piping and valves. Transfer rack does not include racks, arms, or hoses that contain organic HAP only as impurities; or racks, arms, or hoses that vapor balance during all loading operations.
Waste means any material resulting from industrial, commercial, mining, or agricultural operations, or from community activities, that is discarded or is being accumulated, stored, or physically, chemically, thermally, or biologically treated prior to being discarded, recycled, or discharged.
Waste stream means the waste generated by a particular process unit, product tank, or waste management unit. The characteristics of the waste stream (e.g., flow rate, HAP concentration, water content) are determined at the point o f waste generation. Examples of a waste stream include process wastewater, product tank drawdown, sludge and slop oil removed from waste management units, and landfill leachate. (3) Requirements
. The owner or operator must control organic HAP emissions fro m each affected source emission pointPage 82 of 197

by meeting the applicable requirements specified in Table 7 to this section. An owner or operator must perform the applicability assessment procedures and methods for process vents specified in §63.1104, except for par agraphs (d), (g), (h), (i), (j), (l)(1), and (n). An owner or operator must perform the applicability assessment procedures and methods for equipment leaks specified in §63.1107. General compliance, recordkeeping, and reporting requirements are specified i n §§63.1108 through 63.1112. Minimization of emissions from startup, shutdown, and malfunctions must be addressed in the startup, shutdown, and malfunction plan required by §63.1111; the plan must also establish reporting and recordkeeping of such
events. Procedures for approval of alternate means of emission limitations are specified in §63.1113. Table 7 to §63.1103(e) — What Are My Requirements if I Own or Operate an Ethylene Production Existing or New Affected Source? If you own or operate . . . And if .
. . Then you must . . . (a) A storage vessel (as defined in §63.1101) that stores liquid containing organic HAP (1) The maximum true

vapor pressure of total organic HAP is ≥3.4 kilopascals but <76.6 kilopascals; and the capacity of the vessel is ≥4 cubic meters but ≤95 cubic meters (i) Fill the vessel through a submerged pipe; or (ii) Comply with the requirements for storage vessels with capacities ≥95 cubic meters.
(b) A storage vessel (as defined in §63.1101) that (1) The maximum true

vapor pressure of total organic HAP is ≥3.4 kilopascals but <76.6 (i) Comply with the requirements of subpart WW of this part; or (ii) Reduce emissions ofPage 83 of 197

stores liquid containing organic HAP kilopascals; and the

capacity of the vessel is ≥95 cubic meters total organic HA P by 98 weight

- percent by venting emissions through a closed vent system to any combination of control devices and meet the requirements of §63.982(a)(1). (c) A storage vessel (as defined in §63.1101) that stores liquid containing organic HAP (1) The maxi mum true

vapor pressure of total organic HAP is ≥76.6 kilopascals (i) Reduce emissions of total organic HAP by 98 weight

- percent by venting emissions through a closed vent system to any combination of control devices and meet the requirements of §63.982(a) (1). (d) An ethylene process vent (as defined in paragraph (e)(2) of this section) (1) The process vent is

at an existing source and the vent stream has a flow rate ≥0.011 scmm and a total organic HAP concentration ≥50 parts per million by volume; or the process vent is at a new source and the vent stream has a flow rate ≥0.008 scmm and a total organic HAP concentration ≥30 parts per million by volume (i) Reduce emissions of organic HAP by 98 weight

percent; or reduce organic HAP or TOC to a concentration of 20 parts per million by volume; whichever is less stringent, by venting emissions through a closed vent system to any combination of control devices and meet the requirements specified in §63.982(b) and (c)(2). (e) A transfer rack (as defined in paragr aph (e)(2) of this section) (1) Materials loaded

have a true vapor pressure of total organic HAP ≥3.4 kilopascals and ≥76 cubic meters per day (averaged over any consecutive 30

- day period) of HAP

containing material is loaded (i) Reduce emissions of organi c HAP by 98 weight

percent; or reduce organic HAP or TOC to a concentration of 20 parts per million by volume; whichever is less stringent, by venting emissions through a closed vent system to any combination of control devices as specified in §63.1105; orPage 84 of 197 (ii) Install process piping designed to collect the HAP

containing vapors displaced from tank trucks or railcars during loading and to route it to a process, a fuel gas system, or a vapor balance system, as specified in §63.1105. (f) Equipment (as defined in §63.1101) that contains or contacts organic HAP (1) The equipment

contains or contacts ≥5 weight

- percent organic HAP; and the equipment is not in vacuum service Comply with the requirements of subpart UU of this part.

(g) Processes that generat e waste (as defined in paragraph (e)(2) of this section (1) The waste stream

contains any of the following HAP: benzene, cumene, ethyl benzene, hexane, naphthalene, styrene, toluene, o

xylene, m

- xylene, p

xylene, or 1,3

- butadiene (i) Comply with the waste requirements of subpart XX of this part. For ethylene manufacturing process unit waste stream requirements, terms have the meanings specified in subpart XX. (h) A heat exchange system (as defined in paragraph (e)(2) of this section) Comply with the heat exchange system requirements of subpart XX of this part.

(f) Carbon black production applicability, definitions, and requirements

— (1) Applicability

— (i) Affected source
. For the carbon black production source category (as defined in paragraph (f)(2) of this section), the affected source shall comprise each carbon black production process unit located at a major source, as defined in section 112(a) of the Act. The affected source forPage 85 of 197

the carbon black production source category includes all waste management units, maintenance wastewater, and equipment components that contain or contact HAP that are associated with the carbon black production process unit. (ii) Compliance sche dule
. The compliance schedule for the carbon black production and acetylene decomposition carbon black production affected sources, as defined in paragraph (f)(1)(i) of this section, is specified in §63.1102. (2) Definitions
. Carbon black production means the production of carbon black by either the furnace, thermal, acetylene decomposition, or lampblack processes. Carbon black production unit means the equipment assembled and connected by hard

- piping or duct work to process raw materials to manufacture, st ore, and transport a carbon black product. For the purposes of this subpart, a carbon black production process unit includes reactors and associated operations; associated recovery devices; and any feed, intermediate and product storage vessels, product tr ansfer racks, and connected ducts and piping. A carbon black production process unit includes pumps, compressors, agitators, pressure relief devices, sampling connection systems, open

- ended valves or lines, valves, connectors, instrumentation systems, and control devices or systems.Page 86 of 197

Dryer means a rotary

- kiln dryer that is heated externally and is used to dry wet pellets in the wet pelletization process. Main unit filter means the filter that separates the carbon black from the tailgas. Process filter means the filter that separates the carbon black from the conveying air. Purge filter means the filter that separates the carbon black from the dryer exhaust. (3) Requirements
. (i) Table 8 to this section specifies the carbon black production standards applicabi lity for existing and new sources. Applicability assessment procedures and methods are specified in §63.1104. An owner or operator of an affected source is not required to perform applicability tests or other applicability assessment procedures if they opt to comply with the most stringent requirements for an applicable emission point pursuant to this subpart. General compliance, recordkeeping, and reporting requirements are specified in §§63.1108 through 63.1112. Procedures for approval of alternative mean s of emission limitations are specified in §63.1113. (ii) Pressure relief devices used to protect against overpressure in the case of catastrophic failure of your process filter system are exempt from the closed vent system inspection requirements of §63.9 83(b) and (c). Exempt pressure reliefPage 87 of 197

devices must be designated and identified in your Notification of Compliance Status report. Table 8 to §63.1103(f) — What Are My Requirements if I Own or Operate a Carbon Black Production Existing or New Affected Source? If you own or operate . . . And if . . . Then you must . . . (a) A carbon black production main unit filter process vent (1) The HAP

concentration of the emission stream is equal to or greater than 260 parts per million by volume a (i ) Reduce emissions of HAP by using a flare meeting the requirements of subpart SS of this part; or (ii) Reduce emissions of total HAP by 98 weight

- percent or to a concentration of 20 parts per million by volume, whichever is less stringent, by venting emis sions through a closed vent system to any combination of control devices meeting the requirements of §63.982(a)(2).

a The weight

- percent organic HAP is determined according to the procedures specified in §63.1104(e). (g) Cyanide chemicals manufacturing applicability, definitions, and requirements

— (1) Applicability

— (i) Affected

source . For the cyanide chemicals manufacturing source category, the affected source shall include each cyanide chemicals manufacturing process unit located at a major source, as defined in section 112(a) of the Act. The affected source shall also include all waste management units, maintenance wastewater, and equipment (as defined in §63.1101) that contain or contactPage 88 of 197

cyanide chemicals that are associated with the cyanide chemical s manufacturing process unit. (ii) Compliance schedule
. The compliance schedule for the affected source, as defined in paragraph (f)(1)(i) of this section, is specified in §63.1102. (2) Definitions
. Andrussow process unit means a process unit that produces hydrogen cyanide by reacting methane and ammonia in the presence of oxygen over a platinum/rhodium catalyst. An Andrussow process unit begins at the point at which the raw materials are stored and ends at the point at which refined hydrogen cyanide is rea cted as a raw material in a downstream process, burned on

- site as fuel in a boiler or industrial furnace, or is shipped offsite. If raw hydrogen cyanide from the reactor is reacted with sodium hydroxide to form sodium cyanide prior to the refining process, the unit operation where sodium cyanide is formed is considered to be part of the Andrussow process unit. Blausaure Methane Anlage (BMA) process unit means a process unit that produces hydrogen cyanide by reacting methane and ammonia over a platinum catal yst. A BMA process unit begins at the point at which raw materials are stored and ends at the point at which refined hydrogen cyanide is reacted as a raw material in a downstream process, burned on

- site as a fuel in a boiler or industrial furnace, or is sh ipped offsite. If rawPage 89 of 1 97

hydrogen cyanide from the reactor is reacted with sodium hydroxide to form sodium cyanide prior to the refining process, the unit operation where sodium cyanide is formed is considered to be part of the BMA process unit. Byproduct mea ns a chemical that is produced coincidentally during the production of another chemical. Cyanide chemicals manufacturing process unit or CCMPU means the equipment assembled and connected by hard

- piping or duct work to process raw materials to manufacture, store, and transport a cyanide chemicals product. A cyanide chemicals manufacturing process unit shall be limited to any one of the following: an Andrussow process unit, a BMA process unit, a sodium cyanide process unit, or a Sohio hydrogen cyanide process unit. For the purpose of this subpart, a cyanide chemicals manufacturing process unit includes reactors and associated unit operations; associated recovery devices; and any feed, intermediate and product storage vessels, product transfer racks, and connec ted ducts and piping. A cyanide chemicals manufacturing process unit includes pumps, compressors, agitators, pressure relief devices, sampling connection systems,
open - ended valves or lines, valves, connectors, instrumentation systems, and control devices or systems. Cyanide chemicals product means either hydrogen cyanide, potassium cyanide, or sodium cyanide which is manufactured asPage 90 of 197

the intended product of a CCMPU or a byproduct of the Sohio process. Other hydrogen cyanide, potassium cyanide, or sodium
cya nide byproducts, impurities, wastes, and trace contaminants are not considered to be cyanide chemicals products. Dry

- end process vent means a process vent originating from the drum filter or any other unit operation in the dry end of a sodium cyanide manuf acturing process unit. For the purposes of this subpart, the dry end of the sodium cyanide process unit begins in the unit operation where water is removed from the sodium cyanide, usually in the drum filter, and ends when the sodium cyanide is used as a r aw material in a downstream process, or is shipped offsite. Organic HAP means, for purposes of applicability of the requirements of this subpart, all hydrogen cyanide compounds. Raw hydrogen cyanide means hydrogen cyanide that has not been through the refi ning process. Raw hydrogen cyanide usually has a hydrogen cyanide concentration less than 10 percent. Refined hydrogen cyanide means hydrogen cyanide that has been through the refining process. Refined hydrogen cyanide usually has a hydrogen cyanide concen tration greater than 99 percent. Refining process means the collection of equipment in a cyanide chemicals manufacturing processing unit used to concentrate raw hydrogen cyanide from a concentration around 10Page 91 of 197

percent or less to refined hydrogen cyanide at a concentration greater than 99 percent. Sodium cyanide process unit means a process unit that produces sodium cyanide by reacting hydrogen cyanide and sodium hydroxide via the neutralization, or wet, process. A sodium cyanide process unit begins at the un it operation where refined hydrogen cyanide is reacted with sodium hydroxide and ends at the point the solid sodium cyanide product is shipped offsite or used as a raw material in a downstream process. If raw hydrogen cyanide is reacted with sodium hydroxi de to form sodium cyanide prior to the hydrogen cyanide refining process, the unit operation where sodium cyanide is formed is not considered to be part of the sodium cyanide process unit. For this type of process, the sodium cyanide process unit begins at the point that the aqueous sodium cyanide stream leaves the unit operation where the sodium cyanide is formed. In situations where potassium hydroxide is substituted for sodium hydroxide to produce potassium cyanide, the process unit is still considered

a sodium cyanide process unit. Sohio hydrogen cyanide process unit means a process unit that produces hydrogen cyanide as a byproduct of the acrylonitrile production process when acrylonitrile is manufactured using the Sohio process. A Sohio hydrogen cyanid e process unit begins at the point the hydrogen cyanide leaves thePage 92 of 197

unit operation where the hydrogen cyanide is separated from the acrylonitrile (usually referred to as the heads column). The Sohio hydrogen cyanide process unit ends at the point refined hy drogen cyanide is reacted as a raw material in a downstream process, burned on

- site as fuel in a boiler or industrial furnace, or is shipped offsite. If raw hydrogen cyanide is reacted with sodium hydroxide to form sodium cyanide prior to the refining proc ess, the unit operation where sodium cyanide is formed is considered to be part of the Sohio hydrogen cyanide process unit.
Wet

- end process vent means a process vent originating from the reactor, crystallizer, or any other unit operation in the wet end of the sodium cyanide process unit. For the purposes of this subpart, the wet end of the sodium cyanide process unit begins at the point at which the raw materials are stored and ends just prior to the unit operation where water is removed from the sodium cya nide, usually in the drum filter. Wastewater streams containing discarded wastewater from the sodium cyanide production process are not considered to be part of the wet

- end sodium cyanide process. Discarded wastewater that is no longer used in the producti on process is considered to be process and/or maintenance wastewater. Vents from process and maintenance wastewater operations are not wet

- end process vents.Page 93 of 197

(3) Requirements
. Table 9 to this section specifies the cyanide chemicals manufacturing standards applicable to existing and new sources. Applicability assessment procedures and methods are specified in §63.1104. An owner or operator of an affected source is not required to perform applicability tests or other applicability assessment procedures if the y opt to comply with the most stringent requirements for an applicable emission point pursuant to this subpart. General compliance, recordkeeping, and reporting requirements are specified in §§63.1108 through 63.1112. Procedures for approval of alternative means of emission limitations are specified in §63.1113. (4) Determination of overall HAP emission reduction for a process unit
. (i) The owner or operator shall determine the overall HAP emission reduction for process vents in a process unit using Equatio n 1 of this section. The overall organic HAP emission reduction shall be determined for all process vents in the process unit.

Where:
RED CCMPU = Overall HAP emission reduction for the group of process vents in the CCMPU, percent.Page 94 of 197

E unc ,i = Uncontrolled HAP emissions from process vent i that is controlled by using a combustion, recovery, or recapture device, kg/yr. n = Number of process vents in the process unit that are controlled by using a combustion, recovery, or recapture device.
R i = Control efficiency of the combustion, recovery, or recapture device used to control HAP emissions from vent i, determined in accordance with paragraph (g)(4)(ii) of this section.
E unc ,j = Uncontrolled HAP emissions from process vent j that is not controll ed by using a combustion, recovery, or recapture device, kg/yr. m = Number of process vents in the process unit that are not controlled by using a combustion, recovery, or recapture device. (ii) The control efficiency shall be assigned as specified in para graph (g)(4)(ii) (A) or (B) of this section. (A) If the process vent is controlled using a flare in accordance with the provisions of §63.987, or a combustion device in accordance with the provisions of §63.988(b)( 2), for which a performance test has not been conducted, the control efficiency shall be assumed to be 98 weight

- percent. For hydrogen

- fueled flares, an owner or operator may use a control efficiency greater than 98 weight

- percent if they can providePage 95 of 197

engin eering calculations and supporting information demonstrating a greater control efficiency. (B) If the process vent is controlled using a combustion, recovery, or recapture device for which a performance test has been conducted in accordance with the provis ions of §63.997, the control efficiency shall be the efficiency determined by the performance test. (5) Source category specific modifications to testing procedures
. (i) When identifying equipment subject to any equipment leak requirements, an owner or ope rator is allowed to designate specific components of such equipment as never being safe to monitor with their Notification of Compliance Status report and periodic compliance reports. In order for an owner or operator to designate such equipment as never b eing safe to monitor, they must certify that monitoring such equipment at any time the CCMPU is operating is never safe (e.g., monitoring this equipment would present an unreasonable hazard or preclude testing personnel from meeting emergency evacuation

re quirements). If it is demonstrated to the Administrator's satisfaction that equipment designated by the owner or operator as never safe to monitor is appropriately designated, an owner or operator will not be required to monitor such equipment. (ii) For pr ocess vent hydrogen cyanide emissions that are vented to a control device other than a flare during startup,Page 96 of 197

shutdown, and malfunction, the design evaluation must include documentation that the control device being used achieves the required control effici ency during the reasonably expected maximum flow rate and emission rate during startup, shutdown, and malfunction. (iii) If a facility controls process vent emissions during startup, shutdown, and malfunction by using a flare, an owner or operator is not r equired to perform flow rate and heat content testing as specified in §63.987(b)(3)(ii) and (iii). In lieu of performing flow rate and heat content testing, an owner or operator is required to submit engineering calculations that substantiate that a flare meets the applicable heat content or flow rates, or provide data from a compliance assessment that the flare is in compliance under worst case conditions (e.g., maximum operating conditions). (iv) If flare velocity and net heating value testing, as specifi ed in §63.11(b)(6)(ii) and (b)(7)(i), would create an unreasonable hazard for testing personnel, an owner or operator is allowed to submit engineering calculations that substantiate vent stream velocity and heat content of a flare in lieu of test data. The se calculations are required to be submitted with the facilities' compliance test notification report for approval by the Administrator.Page 97 of 197

(v) The data from any performance test method used to measure HCN concentrations must be validated using EPA Method 301 (40 CFR part 63, appendix A). Table 9 to §63.1103(g) — What Are My Requirements if I Own or Operate a Cyanide Chemicals Manufacturing Existing or New Affected Source? If you own or operate

. . . And if . . . Then you must . . . (a) A storage vessel (1) The storage vessel contains refined hydrogen cyanide (i) Reduce emissions of hydrogen cyanide by using a flare meeting the requirements of §63.982(b); or (ii) Reduce emissions of hydrogen cyanide by 98 weight

- percent, or to a concentration of 20 parts per million by volume, by venting emissions through a closed vent system to any combination of control devices meeting the requirements of §63.982(c)(1) or (d). (b) A process vent from a continuous unit operations in an Andrussow, BMA, or Sohio hydrogen cyani de process unit (i) Reduce overall annual emissions of total HAP from the collection of process vents from continuous unit operations in the process by 98 weight

percent in accordance with paragraph (g)(4) of this section. Any control device used to reduc e emissions from one or more process vents from continuous unit operations in the process unit must meetPage 98 of 197 the applicable requirements specified in §63.982(a)(2); or (ii) Reduce emissions of total HAP from each process vent from a continuous unit operati on in the process unit by using a flare meeting the requirements specified in §63.982(b); or (iii) Reduce emissions of total HAP from each process vent from a continuous unit operation in the process unit by 98 weight

percent or to a concentration of 2 0 parts per million by volume, by venting emissions through a closed vent system to any combination of control devices meeting the requirements of §63.982(c)(2) or (d). (c) One or more wet end process vents, as defined in paragraph (g)(2) of this section, in a sodium cyanide process unit (i ) Reduce overall annual emissions of total HAP from the collection of process vents from continuous unit operations in the process unit by 98 weight

- percent in accordance with paragraph (g)(4) of this section. Any control device used to reduce emissions fr om one or more process vents from continuous unit operations in the process unit must meetPage 99 of 197 the applicable requirements of §63.982(a)(2); or (ii) Reduce emissions of total HAP from each wet

end process vent in the process unit by using a flare meeting t he requirements of §63.982(b); or (iii) Reduce emissions of total HAP from each wet

- end process vent by 98 weight

- percent, or to a concentration of 20 parts per million by volume, by venting emissions through a closed vent system and any combination of control devices meeting the requirements of §63.982(c)(2) or (d). (d) One or more dry end process vents, as defined in paragraph (g)(2) of this section, in a sodium cyanide process unit (i) Reduce overall annual emissions of sodium cyanide from the coll ection of process vents from continuous unit operations in the process unit by 98 weight

- percent in accordance with paragraph (g)(4) of this section. Any control device used to reduce emissions from one or more process vents from continuous unit operations in the process unit must meet the applicable requirements of §63.982(a)(2); or (ii) Reduce emissions ofPage 100 of 197 sodium cyanide from each dry

- end process vent in the process unit by 98 weight

- percent by venting emissions through a closed vent system to any combination of control devices meeting the requirements of §63.982(c)(2) or (d). (e) A transfer rack (1) The transfer rack is used to load refined hydrogen cyanide into tank trucks and/or rail cars (i ) Reduce emissions of hydrogen cyanide by using a flare meeting the requirements of §63.982(b); or (ii) Reduce emissions of hydrogen cyanide by 98 weight

- percent, or to a concentration of 20 parts per million by volume, whichever is less stringent, by vent ing emissions through a closed vent system to any combination of control devices meeting the requirements specified in §63.982(c)(1), (c)(2), or (d). (f) A new cyanide chemicals manufacturing process unit that generates process wastewater (1) The process wastewater is from HCN purification, ammonia purification, or flare blowdown (i) Achieve a combined removal and control of HAP from wastewater of 93 weight

- percent.

(g) A cyanide chemicals manufacturing process unit that generates maintenance wastewater ( 1) The maintenance wastewater contains hydrogen cyanide or acetonitrile (i) Comply with the requirements of §63.1106(b).

(h) An item of (1) The item of (i) Comply with thePage 101 of 197

equipment listed in §63.1106(c)(1) that transports or contains wastewater liquid streams from a cyanide chemicals manuf acturing process unit equipment meets the criteria specified in §63.1106(c)(1) through (3) and either (c)(4)(i) or (ii) requirements in Table 35 of subpart G of this part.

(i) Equipment, as defined under §63.1101 (1) The equipment contains or contacts hydrogen cyanide and operates equal to or greater then 300 hours per year (i) Comply with either subpart TT or UU of this part, and paragraph (g)(5) of this section, with the exception that open - ended lines that contain o r contact hydrogen cyanide are exempt from any requirements to install a cap, plug, blind flange, or second valve to be capped. (h) Spandex production applicability, definitions, and requirements

— (1) Applicability

— (i) Affected source
. For the spandex pr oduction (as defined in paragraph (h)(2) of this section) source category, the affected source shall comprise all emission points listed in paragraphs (h)(1)(i)(A) through (C) of this section that are associated with a spandex production process unit locat ed at a major source, as defined in section 112(a) of the Act. (A) All process vents (as defined in §63.1101). (B) All storage vessels (as defined in §63.1101) that store liquids containing organic HAP.Page 102 of 197

(C) All spandex fiber spinning lines using a spinning solution having organic HAP. (ii) Exceptions
. The emission points listed in paragraphs (h)(1)(ii)(A) and (B) of this section are in the spandex production source category but are not subject to the requirements of paragraph (h)(3) of this section. (A) Equ ipment that is located within a spandex production process unit that is subject to this subpart but does not contain organic HAP. (B) Vessels storing organic liquids that contain organic HAP as impurities. (C) Emission points listed in paragraphs (h)(1)(i) (A) through (C) of this section that are associated with a dry spinning spandex production process unit. (iii) Compliance schedule
. The compliance schedule for affected sources, as defined in paragraph (h)(1)(i) of this section, is specified in paragraph ( b) of §63.1102. (2) Definitions
. Dry spinning means a fiber

- forming process where prepolymer is reacted with a chain

- extender to generate polymer prior to spinning; the polymer is dissolved in a solvent and is extruded into a cell of hot gases for fiber fo rmation. Fiber spinning line means the group of equipment and process vents associated with spandex fiber spinning operations. The fiber spinning line includes the blending and dissolvingPage 103 of 197

tanks, spinning solution filters, spinning units, spin bath tanks, a nd the equipment used downstream of the spin bath to wash, draw, or dry on the wet belt the spun fiber. Reaction spinning means a fiber

- forming process where prepolymer is extruded into a spin bath that contains a chain

extender; the chemical reaction to make polymer occurs simultaneously with extrusion/fiber formation. Spandex or spandex fiber means a manufactured synthetic fiber in which the fiber

- forming substance is a long

- chain polymer comprised of at least 85 percent by mass of a segmented polyuretha ne. Spandex production means the production of synthetic spandex fibers. Spandex production process unit means a process unit that is specifically used for the production of synthetic spandex fibers. (3) Requirements
. Table 10 to this section specifies the spandex production source category requirements for new and existing sources. An owner or operator must perform the applicability assessment procedures and methods for process vents specified in §63.1104, excluding paragraphs (b)(1), (d), (g), (h), (i), ( j), (l)(1), and (n). General compliance, recordkeeping, and reporting requirements are specified in §§63.1108 through 63.1112. Minimization of emissions fromPage 104 of 197

startup, shutdown, and malfunctions must be addressed in the startup, shutdown, and malfunction pl an required by §63.1111; the plan must also establish reporting and recordkeeping of such events. Procedures for approval of alternate means of emission limitations are specified in §63.1113. Table 10 to §63.1103(h) — What Are My Requirements if I Own or Ope rate a Spandex Production Process Unit at a New or Existing Source? If you own or operate . . . And if . . . Then you must . . . (a) A storage vessel (as defined in §63.1101) that stores liquid containing organic HAP (1) The maximum true

vapor pressure of the organic HAP is ≥ 3.4 kilopascals; and the capacity of the vessel is ≥ 47 cubic meters (i) Comply with the requirements of subpart WW of this part; or (ii) Reduce emissions of organic HAP by 95 weight

percent by venting emissions in through a closed vent system to any combination of control devices meeting the requirements of subpart SS of this part, as specified in §63.982(a)(1). (b) A process vent Reduce emissions of organic HAP by 95 weight

- percent, or reduce organic HAP or TOC to a concentration of 20 parts per million by volume, whichever is less stringent, by venting emissions through a closed vent system to any combination of control devices meeting the requirements of §63.982(a)(2). (c) A fiber spinning line Operate the fiber spinning line such that emissions are captured and vented through a line closed vent system to a control device thatPage 105 of 197 complies with the requirements of §63.982(a)(2). If a control device other than a flare is used, HAP emissions must be reduced by 95 weight

percent, or t otal organic HAP or TOC must be reduced to a concentration of 20 parts per million by volume, whichever is less stringent. §63.1104 Process vents from continuous unit operations: applicability assessment procedures and methods. (a) General
. The provision s of this section provide calculation and measurement methods for criteria that are required by §63.1103 to be used to determine applicability of the control requirements for process vents from continuous unit operations. The owner or operator of a process vent is not required to determine the criteria specified for a process vent that is being controlled (including control by flare) in accordance with the applicable weight

- percent, TOC concentration, or organic HAP concentration requirement in §63.1103. (b ) Sampling sites
. For purposes of determining process vent applicability criteria, the sampling site shall be located as specified in (b)(1) through (4) of this section, as applicable. (1) Sampling site location if TRE determination is required
. If the app licability criteria specified in thePage 106 of 197

applicable table of §63.1103 includes a TRE index value, the sampling site for determining volumetric flow rate, regulated organic HAP concentration, total organic HAP or TOC concentration, heating value, and TRE index value, shall be after the final recovery device (if any recovery devices are present) but prior to the inlet of any control device that is present, and prior to release to the atmosphere. (2) Sampling site location if TRE determination is not required
. If the applicability criteria specified in the applicable table of §63.1103 does not include a TRE index value, the sampling site for determining volumetric flow rate, regulated organic HAP concentration, total organic HAP or TOC concentration, and any other specified parameter shall be at the exit from the unit operation before any control device. (3) Sampling site selection method
. Method 1 or 1A of 40 CFR part 60, appendix A, as appropriate, shall be used for selection of the sampling site. No traverse site selection method is needed for process vents smaller than 0.10 meter (0.33 foot) in nominal inside diameter. (4) Sampling site when a halogen reduction devi ce is used prior to a combustion device
. An owner or operator using a scrubber to reduce the process vent halogen atom mass emission rate to less than 0.45 kilograms per hour (0.99 pound per hour) prior to a combustion control device in compliance with §63 .1103Page 107 of 197

(as appropriate) shall determine the halogen atom mass emission rate prior to the combustion device according to the procedures in paragraph (i) of this section. (c) Applicability assessment requirement
. The TOC or organic HAP concentrations, process vent volumetric flow rates, process vent heating values, process vent TOC or organic HAP emission rates, halogenated process vent determinations, process vent TRE index values, and engineering assessments for process vent control applicability assessment requirements are to be determined during maximum representative operating conditions for the process, except as provided in paragraph (d) of this section, or unless the Administrator specifies or approves alternate operating conditions. For acrylic and mod acrylic fiber production affected sources and polycarbonate production affected sources, o perations during periods of malfunction shall not constitute representative conditions for the purpose of an applicability test
. For all other affected sources, O o perations during periods of startup, shutdown, and malfunction shall not constitute representative conditions for the purpose of an applicability test. (d) Exceptions
. For a process vent stream that consists of at least one process vent from a batch unit o peration manifolded with at least one process vent from a continuous unit operation, the TRE shall be calculated during periods when one or morePage 108 of 197

batch emission episodes are occurring that result in the highest organic HAP emission rate (in the combined ven t stream that is being routed to the recovery device) that is achievable during the 6

- month period that begins 3 months before and ends 3 months after the TRE calculation, without causing any of the situations described in paragraphs (d)(1) through (3) to occur. (1) Causing damage to equipment; (2) Necessitating that the owner or operator make product that does not meet an existing specification for sale to a customer; or (3) Necessitating that the owner or operator make product in excess of demand. (e) TOC or Organic HAP concentration
. The TOC or organic HAP concentrations shall be determined based on paragraph (e)(1), (e)(2), or (k) of this section, or any other method or data that have been validated according to the protocol in Method 301 of appendix A o f 40 CFR part 63. For concentrations needed for comparison with the appropriate control applicability concentrations specified in §63.1103, TOC or organic HAP concentration shall be determined based on paragraph (e)(1), (e)(2), or (k) of this section or an y other method or data that has been validated according to the protocol in method 301 of appendix A of this part. The owner or operator shall record thePage 109 of 197

TOC or organic HAP concentration as specified in paragraph (l)(3) of this section. (1) Method 18
. The procedures specified in paragraph (e)(1)(i) and (ii) of this section shall be used to calculate parts per million by volume concentration using method 18 of 40 CFR part 60, appendix A: (i) The minimum sampling time for each run shall be 1 hour in which eit her an integrated sample or four grab samples shall be taken. If grab sampling is used, then the samples shall be taken at approximately equal intervals in time, such as 15

- minute intervals during the run. (ii) The concentration of either TOC (minus methan e and ethane) or regulated organic HAP emissions shall be calculated according to paragraph (e)(1)(ii)(A) or (B) of this section, as applicable. (A) The TOC concentration (C TOC ) is the sum of the concentrations of the individual components and shall be

com puted for each run using Equation 1:

Where:
C TOC = Concentration of TOC (minus methane and ethane), dry basis, parts per million by volume.Page 110 of 197

C ji = Concentration of sample component j of the sample i, dry basis, parts per million by volume. n = Number of c omponents in the sample. x = Number of samples in the sample run. (B) The regulated organic HAP or total organic HAP concentration (C HAP ) shall be computed according to Equation 1 in paragraph (e)(1)(ii)(A) of this section except that only the regulated or total organic HAP species shall be summed, as appropriate. (2) Method 25A
. The procedures specified in paragraphs (e)(2)(i) through (vi) of this section shall be used to calculate parts per million by volume concentration using Method 25A of 40 CFR part 6 0, appendix A. (i) Method 25A of 40 CFR part 60, appendix A shall be used only if a single organic HAP compound comprises greater than 50 percent of total organic HAP or TOC, by volume, in the process
vent. (ii) The process vent composition may be determin ed by either process knowledge, test data collected using an appropriate Environmental Protection Agency method or a method or data validated according to the protocol in Method 301 of appendix A of part 63. Examples of information that could constitute pr ocess knowledge include calculations based on material balances, process stoichiometry, or previous testPage 111 of 197

results provided the results are still relevant to the current process vent conditions. (iii) The organic compound used as the calibration gas for Meth od 25A of 40 CFR part 60, appendix A shall be the single organic HAP compound present at greater than 50 percent of the total organic HAP or TOC by volume. (iv) The span value for Method 25A of 40 CFR part 60, appendix A shall be equal to the appropriate c ontrol applicability concentration value specified in the applicable table(s) presented in §63.1103 of this subpart. (v) Use of Method 25A of 40 CFR part 60, appendix A is acceptable if the response from the high

- level calibration gas is at least 20 times the standard deviation of the response from the zero calibration gas when the instrument is zeroed on the most sensitive scale. (vi) The owner or operator shall demonstrate that the concentration of TOC including methane and ethane measured by Method 25A o f 40 CFR part 60, appendix A is below one

- half the appropriate control applicability concentration specified in the applicable table for a subject source category in §63.1103 in order to qualify for a low organic HAP concentration exclusion. (f) Volumetric flow rate
. The process vent volumetric flow rate (Q S ), in standard cubic meters per minute at 20 °C, shall bePage 112 of 197

determined as specified in paragraph (f)(1) or (2) of this section and shall be recorded as specified in §63.1109(d). (1) Use Method 2, 2A, 2C, 2 D, 2F, or 2G of 40 CFR part 60, appendix A, as appropriate. If the process vent tested passes through a final steam jet ejector and is not condensed, the stream volumetric flow shall be corrected to 2.3 percent moisture; or (2) The engineering assessment procedures in paragraph (k) of this section can be used for determining volumetric flow
rates. (g) Heating value
. The net heating value shall be determined as specified in paragraphs (g)(1) and (2) of this section, or by using the engineering assessment pr ocedures in paragraph (k) of this section. (1) The net heating value of the process vent shall be calculated using Equation 2:

Where:
H T = Net heating value of the sample, megaJoule per standard cubic meter, where the net enthalpy per mole of process ven t is based on combustion at 25°C and 760 millimeters of mercury, but the standard temperature for determining the volumePage 113 of 197

corresponding to 1 mole is 20°C, as in the definition of Q s (process vent volumetric flow rate).
K 1 = Constant, 1.740 × 10 −7 (parts per m illion) −1 (gram

- mole per standard cubic meter) (megaJoule per kilocalorie), where standard temperature for (gram

- mole per standard cubic meter) is 20°C.

D j = Concentration on a wet basis of compound j in parts per million, as measured by procedures indicated in paragraph (e)(2) of this section. For process vents that pass through a final steam jet and are not condensed, the moisture is assumed to be 2.3 perc ent by volume.
H j = Net heat of combustion of compound j, kilocalorie per
gram - mole, based on combustion at 25°C and 760 millimeters
mercury. (2) The molar composition of the process vent (D j ) shall be determined using the methods specified in paragraphs ( g)(2)(i) through (iii) of this section: (i) Method 18 of 40 CFR part 60, appendix A to measure the concentration of each organic compound. (ii) American Society for Testing and Materials D1946

– 90 to measure the concentration of carbon monoxide and hydrogen
. (iii) Method 4 of 40 CFR part 60, appendix A to measure the moisture content of the stack gas.Page 114 of 197

(h) TOC or Organic HAP emission rate
. The emission rate of TOC (minus methane and ethane) (E TOC ) and the emission rate of the regulated organic HAP or total or ganic HAP (E HAP ) in the process vent, as required by the TRE index value equation specified in paragraph (j) of this section, shall be calculated using Equation 3:

Where: E = Emission rate of TOC (minus methane and ethane) (E TOC ) or emission rate of the regulated organic HAP or total organic HAP (E HAP ) in the sample, kilograms per hour.
K 2 = Constant, 2.494 × 10 −6 (parts per million) −1 (gram

- mole per standard cubic meter) (kilogram/gram) (minutes/hour), where standard temperature for (gram

- mole per standard cubic meter) is 20°C. n = Number of components in the sample.
C j = Concentration on a dry basis of organic compound j in parts per million as measured by method 18 of 40 CFR part 60, appendix A as indicated in paragraph (e) of this section. If the TOC emi ssion rate is being calculated, C j includes all organic compounds measured minus methane and ethane; if the total organic HAP emission rate is being calculated, only organic HAP compounds are included; if the regulated organic HAP emissionPage 115 of 197

rate is being ca lculated, only regulated organic HAP compounds are included.
M j = Molecular weight of organic compound j, gram/gram

- mole. Q s = Process vent flow rate, dry standard cubic meter per minute, at a temperature of 20°C. (i) Halogenated process vent determination
. In order to determine whether a process vent is halogenated, the mass emission rate of halogen atoms contained in organic compounds shall be calculated according to the procedures specified in paragraphs (i)(1) and (2) of this section. A process vent is considered halogenated if the mass emission rate of halogen atoms contained in the organic compounds is equal to or greater than 0.45 kilograms per hour. (1) The process vent concentration of each organic compound containing halogen atoms (parts per millio n by volume, by compound) shall be determined based on one of the procedures specified in paragraphs (i)(1)(i) through (iv) of this section: (i) Process knowledge that no halogen or hydrogen halides are present in the process vent, or (ii) Applicable engin eering assessment as discussed in paragraph (k) of this section, or (iii) Concentration of organic compounds containing halogens or hydrogen halides as measured by Method 26 or 26A of 40 CFR part 60, appendix A, orPage 116 of 197

(iv) Any other method or data that have b een validated according to the applicable procedures in method 301 of appendix A of this part. (2) Equation 4 shall be used to calculate the mass emission rate of halogen atoms:

Where: E = Mass of halogen atoms, dry basis, kilogram per hour,
K 2 = Constant, 2.494 × 10 −6 (parts per million) −1 (kilogram

mole per standard cubic meter) (minute per hour), where standard temperature is 20°C. Q = Flow rate of gas stream, dry standard cubic meters per minute, determined according to paragraph (f)(1) or (f) (2) of this section. n = Number of halogenated compounds j in the gas stream. j = Halogenated compound j in the gas stream. m = Number of different halogens i in each compound j of the gas stream. i = Halogen atom i in compound j of the gas stream.
C j = Co ncentration of halogenated compound j in the gas stream, dry basis, parts per million by volume.
L ji = Number of atoms of halogen i in compound j of the gas
stream.Page 117 of 197

M ji = Molecular weight of halogen atom i in compound j of the gas stream, kilogram per kilo gram - mole. (j) TRE index value
. The owner or operator shall calculate the TRE index value of the process vent using the equations and procedures in this paragraph, as applicable, and shall maintain records specified in paragraph (l)(1) or (m)(2) of this se ction, as applicable. (1) TRE index value equation
. The equation for calculating the TRE index value is Equation 5: TRE = 1/E HAP *[A+B(Q S )+ C(H T )+ D(E TOC )] [Eq. 5] Where: TRE = TRE index value. A, B, C, D = Coefficients presented in table 1 of this section.
E HAP = Emission rate of total organic HAP, kilograms per hour, as calculated according to paragraph (h) or (k) of this section. Q S = process vent flow rate, standard cubic meters per minute, at a standard temperature of 20 °C, as calculated according to p aragraph (f) or (k) of this section.
H T = process vent net heating value, megaJoules per standard cubic meter, as calculated according to paragraph (g) or (k) of this section.Page 118 of 197

E TOC = Emission rate of TOC (minus methane and ethane), kilograms per hour, as c alculated according to paragraph (h) or (k) of this section. Table 1 of §63.1104(j)(1) — Coefficients for Total Resource Effectiveness a

Existin g or new? Halogenate

d vent stream? Control

device basis Values of coefficients

A B C D Existin g Yes Thermal Incinerato r and Scrubber 3.995 5.200×10 −2 −1.769×10

−3 9.700×10 −4

No Flare 1.935 3.660×10 −1 −7.687×10

−3 −7.333×10

−4 Thermal Incinerato r 0 Percent Recovery 1.492 6.267×10 −2 3.177×10 −2 −1.159×10 −3

Thermal Incinerato r 70 Percent Recovery 2.519 1.183×10 −2 1.300×10 −2 4.790×10 −2

New Yes Thermal Incinerato r and Scrubber 1.0895 1.417×10 −2 −4.822×10

−4 2.645×10 −4

No Flare 5.276×10 −1 9.98×10 −2 −2.096×10 −3 2.000×10 −4

Therman Incinerato r 0 Percent Recovery 4.068×10

−1 1.71×10 −2 8.664×10 −3 −3.162×10 −4

Thermal Incinerato r 70 6.868×10

−1 3.209×10

−3 3.546×10 −3 1.306×10 −2Page 119 of 197 Percent Recovery

a Use according to procedures outlined in this section. MJ/scm = Mega Joules per standard cubic meter. scm/min = Standard cubic meters per minute. (2) Nonhalogenated process vents
. The owner or operator of a nonhalogenated process vent shall calculate the TRE index value by using the equation and appropriate nonhalogenated process vent parameters in table 1 of this section for process vents at existing a nd new sources. The lowest TRE index value is to be selected. (3) Halogenated process vents
. The owner or operator of a halogenated process vent stream, as determined according to procedures specified in paragraph (i) or (k) of this section, shall calculat e the TRE index value using the appropriate halogenated process vent parameters in table 1 of this section for existing and new sources. (k) Engineering assessment
. For purposes of TRE index value determinations, engineering assessments may be used to dete rmine process vent flow rate, net heating value, TOC emission rate, and total organic HAP emission rate for the representative operating condition expected to yield the lowest TRE index value. Engineering assessments shall meet the requirements of
paragrap hs (k)(1) through (4) of this section. If a process ventPage 120 of 197

flow rate or process vent organic HAP or TOC concentration is being determined for comparison with the applicable flow rate or concentration value presented in the tables in §63.1103 to determine con trol requirement applicability, engineering assessment may be used to determine the flow rate or concentration for the representative operating conditions expected to yield the highest flow rate or concentration. (1) If the TRE index value calculated using such engineering assessment and the TRE index value equation in paragraph (j) of this section is greater than 4.0, then the owner or operator is not required to perform the measurements specified in paragraphs (e) through (i) of this section. (2) If the T RE index value calculated using such engineering assessment and the TRE index value equation in paragraph (j) of this section is less than or equal to 4.0, then the owner or operator is required either to perform the measurements specified in paragraphs (e ) through (i) of this section for control applicability assessment or comply with the requirements (or standards) specified in the tables presented in §63.1103 (as applicable). (3) Engineering assessment includes, but is not limited to, the examples specif ied in paragraphs (k)(3)(i) through (iv) of this section:Page 121 of 197

(i) Previous test results, provided the tests are representative of current operating practices at the process unit. (ii) Bench

- scale or pilot

- scale test data representative of the process under rep resentative operating conditions. (iii) Maximum flow rate, TOC emission rate, organic HAP emission rate, organic HAP or TOC concentration, or net heating value limit specified or implied within a permit limit applicable to the process vent. (iv) Design ana lysis based on accepted chemical engineering principles, measurable process parameters, or physical or chemical laws or properties. Examples of analytical methods include, but are not limited to those specified in paragraphs (k)(3)(iv)(A) through (k)(3)(iv )(D) of this section: (A) Use of material balances based on process stoichiometry to estimate maximum TOC or organic HAP concentrations, (B) Estimation of maximum flow rate based on physical equipment design such as pump or blower capacities, (C) Estimatio n of TOC or organic HAP concentrations based on saturation conditions, and (D) Estimation of maximum expected net heating value based on the stream concentration of each organic compound or, alternatively, as if all TOC in the stream were the compound with the highest heating value.Page 122 of 197

(4) All data, assumptions, and procedures used in the engineering assessment shall be documented. The owner or operator shall maintain the records specified in paragraphs (l)(1) through (4) of this section, as applicable. (l) Ap plicability assessment recordkeeping requirements

— (1) TRE index value records
. The owner or operator shall maintain records of measurements, engineering assessments, and calculations performed to determine the TRE index value of the process vent according to the procedures of paragraph (j) of this section, including those records associated with halogen vent stream determination. Documentation of engineering assessments shall include all data, assumptions, and procedures used for the engineering assessment s, as specified in paragraph (k) of this section. As specified in paragraph (m) of this section, the owner or operator shall include this information in the Notification of Compliance Status report required by §63.1110(a)(4) . (2) Flow rate records
. The ow ner or operator shall record the flow rate as measured using the sampling site and flow rate determination procedures (if applicable) specified in paragraphs (b) and (f) of this section or determined through engineering assessment as specified in paragraph (k) of this section. As specified in paragraph (m) of this section, the owner orPage 123 of 197

operator shall include this information in the Notification of Compliance Status report required by §63.1110(a)(4). (3) Concentration records
. The owner or operator shall

rec ord the regulated organic HAP or TOC concentration (if applicable) as measured using the sampling site and regulated organic HAP or TOC concentration determination procedures specified in paragraphs (e)(1) and (2) of this section, or determined through eng ineering assessment as specified in paragraph (k) of this section. As specified in paragraph (m) of this section, the owner or operator shall include this information in the Notification of Compliance Status report required by §63.1110(a)(4). (4) Process c hange records
. The owner or operator shall keep up

- to

- date, readily accessible records of any process changes that change the control applicability for a process vent. Records are to include any recalculation or measurement of the flow rate, regulated orga nic HAP or TOC concentration, and TRE index value. (m) Applicability assessment reporting requirements

— (1) Notification of Compliance Status
. The owner or operator shall submit, as part of the Notification of Compliance Status report required by §63.1110( a)(4), the information recorded in paragraph (l)(1) through (3) of this section.Page 124 of 197

(2) Process change
. (i) Whenever a process vent becomes subject to control requirements under this subpart as a result of a process change, the owner or operator shall submit a report within 60 days after the performance test or applicability assessment, whichever is sooner. The report may be submitted as part of the next Periodic Report required by §63.1110(a)(5). The report shall include the information specified in paragraph s (m)(2)(i)(A) through (C) of this section. (A) A description of the process change; (B) The results of the recalculation of the TOC or organic HAP concentration, flow rate, and/or TRE index value required under paragraphs (e), (f), and (j), and recorded u nder paragraph (l); and (C) A statement that the owner or operator will comply with the requirements specified in §63.1103 by the schedules specified in that section for the affected source. (ii) If a performance test is required as a result of a
process change, the owner or operator shall specify that the performance test has become necessary due to a process change. This specification shall be made in the performance test notification to the Administrator, as specified in §63.999(a)(1). (iii) If a proces s change does not result in additional applicable requirements, then the owner or operator shallPage 125 of 197

include a statement documenting this in the next Periodic Report required by §63.1110(a)(5) after the process change was made. (n) Parameter monitoring of cert ain process vents
. An owner or operator who maintains a TRE index value (if applicable) in the applicable TRE index value monitoring range as specified in an applicable table presented in §63.1103 of this subpart without using a recovery device shall repor t a description of the parameter(s) to be monitored to ensure the process vent is operated in conformance with its design or process and achieves and maintains the TRE index value above the specified level, and an explanation of the criteria used to select parameter(s). An owner or operator who maintains a TRE index value (if applicable) in the applicable TRE index monitoring range as specified in an applicable table presented in §63.1103 of this subpart by using a recovery device shall comply with the
requ irements of §63.993(c). §63.1105 Transfer racks. (a) Design requirements
. The owner or operator shall equip each transfer rack with one of the control options listed in paragraphs (a)(1) through (4) of this section. (1) A closed vent system designed to col lect HAP

- containing vapors displaced from tank trucks or railcars during loading and to route the collected vapors to a flare. The owner or operator must meet the requirements of §63.982(a)(3).Page 126 of 197

(2) A closed vent system designed to collect HAP

- containing

va pors displaced from tank trucks or railcars during loading and to route the collected vapors to a control device other than a flare. The owner or operator must meet the requirements of §63.982(a)(3). (3) Process piping designed to collect the HAP vapors di splaced from tank trucks or railcars during loading and to route the collected vapors to a process where the HAP vapors shall predominantly meet one of, or a combination of, the ends specified in paragraphs (a)(3)(i) through (iv) of this section or to a fu el gas system. The owner or operator must meet the requirements of §63.982(a)(3). (i) Recycled and/or consumed in the same manner as a material that fulfills the same function in that process; (ii) Transformed by chemical reaction into materials that

are n ot HAP; (iii) Incorporated into a product; and/or (iv) Recovered. (4) Process piping designed to collect the HAP vapors displaced from tank trucks or railcars during loading and to route the collected vapors to a vapor balance system. The vapor balance sys tem must be designed to route the collected HAP vapors to the storage vessel from which the liquid being loaded originated, or to another storage vessel connected to a commonPage 127 of 197

header, or to compress and route collected HAP vapors to a
process. (b) Operating requirements
. An owner or operator of a transfer rack shall operate it in such a manner that emissions are routed through the equipment specified in paragraph (a) of this section. (c) Control device operation
. Whenever HAP emissions are vented to a contro l device used to comply with the provisions of this subpart, such control device shall be operating. (d) Tank trucks and railcars
. The owner or operator shall load HAP

- containing materials only into tank trucks and railcars that meet the requirement in par agraph (d)(1) or (2) of this section and shall maintain the records specified in paragraph (i) of this section. (1) Have a current certification in accordance with the U.S. Department of Transportation (DOT) pressure test requirements of 49 CFR part 180 fo r tank trucks and 49 CFR 173.31 for railcars; or (2) Have been demonstrated to be vapor

- tight within the preceding 12 months as determined by the procedures in paragraph (h) of this section. Vapor

- tight means that the pressure in a truck or railcar tank wi ll not drop more than 750 pascals within 5 minutes after it is pressurized to a minimum of 4,500 pascals.Page 128 of 197

(e) Pressure relief device
. The owner or operator of a transfer rack subject to the provisions of this subpart shall ensure that no pressure relief de vice in the loading equipment of each tank truck or railcar shall begin to open to the atmosphere during loading. Pressure relief devices needed for safety purposes are not subject to the requirements of this paragraph. (f) Compatible system
. The owner or operator of a transfer rack subject to the provisions of this subpart shall load HAP

containing materials only to tank trucks or railcars equipped with a vapor collection system that is compatible with the transfer rack's closed vent system or process pipi ng. (g) Loading while systems connected
. The owner or operator of a transfer rack subject to this subpart shall load HAP

containing material only to tank trucks or railcars whose collection systems are connected to the transfer rack's closed vent system or process piping. (h) Vapor tightness procedures
. For the purposes of demonstrating vapor tightness to determine compliance with paragraph (d)(2) of this section, the procedures and equipment specified in paragraphs (h)(1) and (2) shall be used. (1) The pre ssure test procedures specified in Method 27 of appendix A to 40 CFR part 60.Page 129 of 197

(2) A pressure measurement device that has a precision of ±2.5 millimeters of mercury or better and that is capable of measuring above the pressure at which the tank truck or rai lcar is to be tested for vapor tightness. (i) Recordkeeping
. The owner or operator of a transfer rack shall record that the verification of DOT tank certification or Method 27 of appendix A to 40 CFR part 60 testing required in §63.84(c) has been performed . Various methods for the record of verification can be used, such as a check

- off on a log sheet, a list of DOT serial numbers or Method 27 data, or a position description for gate security showing that the security guard will not allow any trucks on

- site that do not have the appropriate documentation. §63.1106 Wastewater provisions. (a) Process wastewater . Except as specified in paragraphs (a)(1) through (a)(16) and paragraph (d) of this section, the owner or operator of each affected source shall comply w ith the HON process wastewater requirements in §§63.132 through 63.148. (1) When terms used in §§63.132 through 63.148 are defined in §63.1101, the definition in §63.1101 shall apply, for the purposes of this subpart. For terms used in §§63.132 through 63. 148 that are not defined in §63.1101, the definitions in §§63.101 and 63.111 shall apply.Page 130 of 197

(2) When the term chemical manufacturing production process unit, or CMPU, is used in §§63.132 through 63.148, the phrase “a process unit whose primary product is a product produced by a source category subject to this subpart” shall apply, for the purposes of this subpart. (3) Owners and operators of affected sources are not required to comply with §63.132(b)(1) and (d) and §63.138(c). Further, owners and operators a re exempt from all requirements in §§63.132 through 63.148 that pertain solely and exclusively to organic HAP listed in Table 8 of subpart G of this part. (4) When the determination of equivalence criteria in §63.102(b) is referred to in §§63.132, 63.133, and 63.137, the alternative nonopacity emission standard provisions in §63.6(g) shall apply, for the purposes of this subpart. (5) When the HON storage vessel requirements for internal floating roofs contained in §63.119(b) are referred to in §63.133(a)(2) (ii), the requirements in §63.1063(a)(1)(i), (2), and (b) shall apply, for the purposes of this subpart. (6) When the HON storage vessel requirements for external floating roofs in §§63.119(c) and 63.120(b)(5) and (6) are referred to in §63.133(a)(2)(iii) and (d), the requirements in §63.1063(a)(1)(ii), (2), and (b) shall apply, for the purposes of this subpart.Page 131 of 197

(7) For the purposes of this subpart, §63.1063(c)(2)(iv) shall apply instead of §63.133(e). (8) When §§63.143(c), (d), (e)(3) and 63.146(a) require the submission of a request for approval to monitor alternative parameters according to the procedures specified in §63.151(f) or (g), the owner or operator requesting to monitor alternative parameters shall follow the procedures specified in §63.1108(c) or as specified in a referenced subpart. (9) When §63.147(d) requires the owner or operator to keep records of the daily average value of each continuously monitored parameter for each operating day as specified in §63.152(f), the owner or operator shall k eep records of each continuously monitored parameter for each operating day as specified in §63.998(b). (10) When §63.132(a) and (b) refer to the “applicable dates specified in §63.100 of subpart F of this part,” the applicable compliance dates specified i n §63.1102 shall apply, for purposes of this subpart. (11) Where §63.152(b) and/or the Notification of Compliance Status is referred to in §§63.132 through 63.148, the Notification of Compliance Status requirements contained in §63.1110(a)(3) shall apply, for purposes of this subpart. (12) Where §63.152(c) and/or the Periodic Report requirements are referred to §§63.132 through 63.148, thePage 132 of 197

Periodic Report requirements contained in §63.1110(a)(4) shall apply, for purposes of this subpart. (13) When Method 18 of appendix A to part 60 of this chapter is specified in §63.139(e)(1)(ii), §63.145(d)(4), or §63.145(i)(2), either Method 18 or Method 25A may be used. The use of Method 25A of appendix A to part 60 of this chapter shall comply with paragraphs (a)(13)(i) and (a)(13)(ii) of this section. (i) The organic HAP used as the calibration gas for Method 25A of appendix A of part 60 of this chapter shall be the single organic HAP representing the largest percent by volume of the emissions. (ii) The use of Method 25 A of appendix A of part 60 of this chapter is acceptable if the response from the high

- level calibration gas is at least 20 times the standard deviation of the response from the zero calibration gas when the instrument is zeroed on the most sensitive scale
. (14) When the HON recordkeeping requirements for by

- pass lines in §63.118(a)(3) is referred to in §63.148(f), the requirements in §63.998(d)(1)(ii)(A) shall apply, for the purposes of this subpart. (15) When the Initial Notification requirements in §63.1 82(b) are referred to in §63.148(j), the requirements in §63.1110(c) shall apply, for the purposes of this subpart.Page 133 of 197

(16) For the purposes of this subpart, §63.148(k) shall not apply. (b) Maintenance wastewater
. The owner or operator of each affected source shall comply with the HON maintenance wastewater requirements in §63.105. When terms used in §63.105 are defined in §63.1101, the definition in §63.1101 shall apply, for the purpose of this subpart. For terms used in §63.105 that are not defined in §63.11 01, the definitions in §§63.101 and 63.111 shall apply. (c) Liquid streams in open systems
. The owner or operator shall comply with the provisions of Table 35 of subpart G of this part for each item of equipment meeting the criteria specified in paragraphs (c)(1) through (3) of this section and either paragraph (c)(4)(i) or (ii) of this section, with the exceptions provided in paragraphs (c)(5) and (6) of this section. (1) The item of equipment is one of the types of equipment identified in paragraphs (c)(1 )(i) through (vii) of this section. (i) Drain or drain hub; (ii) Manhole (including sumps and other points of access to a conveyance system); (iii) Lift station; (iv) Trench;Page 134 of 197

(v) Pipe; (vi) Oil/water separator; and (vii) Tanks with capacities of 38 m 3 or g reater. (2) The item of equipment is part of an affected source that is subject to this subpart. (3) The item of equipment is controlled less stringently than in Table 35 of subpart G of this part, and the item of equipment is not otherwise exempt from the provisions of this subpart, or a referenced subpart. (4) The item of equipment: (i) Is a drain, drain hub, manhole, lift station, trench, pipe, or oil/water separator that conveys water with a total annual average concentration greater than or equal to 10 ,000 parts per million by weight of Table 9 compounds (as defined under this subpart) at any flow rate; or a total annual average concentration greater than or equal to 1,000 parts per million by weight of Table 9 compounds (as defined under this subpart) at an annual average flow rate greater than or equal to 10 liters per minute. (ii) Is a tank that receives one or more streams that contain water with a total annual average concentration greater than or equal to 1,000 parts per million by weight of Table 9 compounds (as defined under this subpart) at an annual average flow rate greater than or equal to 10 liters per minute. ThePage 135 of 197

owner or operator shall determine the characteristics of the stream as specified in paragraphs (c)(4)(ii)(A) and (B) of this secti on. (A) The characteristics of the stream being received shall be determined at the inlet to the tank. (B) The characteristics shall be determined according to the procedures in §63.144(b) and (c). (5) When terms used in Table 35 of subpart G of this part are defined in §63.1101, the definition in §63.1101 shall apply, for the purpose of this subpart. For terms used in Table 35 of subpart G of this part that are not defined in §63.1101, the definitions in §63.101 and §63.111 shall apply. (6) When Table 35 o f subpart G of this part refers to 40 CFR 63.119(e)(1) or (e)(2) in the requirements for tanks, the requirements in §63.982(a)(1) shall apply, for purposes of this subpart. (d) The compliance date for the affected sources subject to the provisions of this section is specified in §63.1102. §63.1107 Equipment leaks : applicability assessment procedures and methods
. (a) Each piece of equipment within a process unit that can reasonably be expected to contain equipment in organic HAP service is presumed to be in organic HAP service unless an owner or operator demonstrates that the piece of equipment is not inPage 136 of 197

organic HAP service. For a piece of equipment to be considered not in organic HAP service, it must be determined that the percent organic HAP content can be reasonably expected not to exceed the percent by weight control applicability criteria specified in §63.1103 for an affected source on an annual average basis. For purposes of determining the percent organic HAP content of the process fluid that is contain ed in or contacts equipment, Method 18 of 40 CFR part 60, appendix A shall be used. (b) An owner or operator may use good engineering judgment rather than the procedures in paragraph (a) of this section to determine that the percent organic HAP content doe s not exceed the percent by weight control applicability criteria specified in §63.1103 for an affected source. When an owner or operator and the Administrator do not agree on whether a piece of equipment is not in organic HAP service, however, the procedu res in paragraph (a) of this section shall be used to resolve the disagreement. (c) If an owner or operator determines that a piece of equipment is in organic HAP service, the determination can be revised after following the procedures in paragraph (a) of this section, or by documenting that a change in the process or raw materials no longer causes the equipment to be in organic HAP service.Page 137 of 197

(d) Samples used in determining the percent organic HAP content shall be representative of the process fluid that is contained in or contacts the equipment. (e) Requirements for pressure relief devices . For acrylic and modacrylic fiber production affected sources and polycarbonate production affected sources, except as specified in paragraph (e)(4) of this section, the owner or operator must comply with the requirements specified in paragraphs (e)(1) and (2) of this section for pressure relief devices in organic HAP gas or vapor service. Except as specified in paragraph (e)(4) of this section, the owner or operator of an acrylic and modacrylic fiber production affected source or polycarbonate production affected source must also comply with the requirements specified in paragraph (e)(3) of this section for all pressure relief devices in organic HAP service. (1) Operating requirements . Except during a pressure release event, operate each pressure relief device in organic HAP gas or vapor service with an instrument reading of less than 500 ppm above background as detected by Method 21 of 40 CFR part 60, appendix A. (2) Press ure release requirements . For pressure relief devices in organic HAP gas or vapor service, comply with paragraph (e)(2)(i) or (ii) of this section, as applicable.Page 138 of 197

(i) If the pressure relief device does not consist of or include a rupture disk, conduct inst rument monitoring, as detected by Method 21 of 40 CFR part 60, appendix A, no later than 5 calendar days after the pressure relief device returns to organic HAP service following a pressure release to verify that the pressure relief device is operating wit h an instrument reading of less than 500 ppm above background. After 5 calendar days, an instrument reading of 500 ppm above background or greater is a violation. (ii) If the pressure relief device consists of or includes a rupture disk, install a replacem ent disk as soon as practicable after a pressure release, but no later than 5 calendar days after the pressure release. The owner or operator must also conduct instrument monitoring, as detected by Method 21 of 40 CFR part 60, appendix A, no later than 5 c alendar days after the pressure relief device returns to organic HAP service following a pressure release to verify that the pressure relief device is operating with an instrument reading of less than 500 ppm above background. After 5 calendar days, an ins trument reading of 500 ppm above background or greater is a violation. (3) Pressure release management . Except as specified in paragraph (e)(4) of this section, the owner or operator must comply with the requirements specified in paragraphs (e)(3)(i) and ( ii) of this section for all pressure relief devices inPage 139 of 197

organic HAP service. Any pressure release from such a pressure relief device is a violation. (i) The owner or operator must equip each pressure relief device in organic HAP service with a device(s) or parameter monitoring system that is capable of identifying and recording the time and duration of each pressure release and of notifying operators immediately that a pressure release is occurring. The device or monitoring system may be either specific to t he pressure relief device itself or on an associated process system or piping sufficient to indicate a pressure release to the atmosphere. Examples of these types of devices and systems include, but are not limited to, a rupture disk indicator, magnetic se nsor, motion detector on the pressure relief valve stem, flow monitor, or pressure monitor. Regardless of the methodology chosen, when the device or monitoring system indicates that a pressure release has occurred, it shall be directly enforceable as a rel ease from the pressure relief device. If this instrument is capable of measuring the concentration of leaks through the pressure relief device, then the owner or operator may use this instrument to meet the requirements of paragraph (e)(2) of this section. (ii) If any pressure relief device in organic HAP service releases to atmosphere as a result of a pressure release event, the owner or operator must calculate the quantity of organic HAPPage 140 of 197

released during each pressure release event and report this quantity as required in paragraph (g) of this section
. Calculations may be based on data from the pressure relief device monitoring alone or in combination with process parameter monitoring data and process knowledge. (4) Pressure relief devices routed to a control device or
process . If a pressure relief device in organic HAP service is designed and operated to route all pressure releases through a closed vent system to a control device or process, the owner or operator is not required to comply with paragrap hs (e)(1), (2), or (3) (if applicable) of this section. Both the closed vent system and control device (if applicable) must meet the requirements of § 63.1034 of this part. (f) Recordkeeping requirements
. For acrylic and modacrylic fiber production affecte d sources and polycarbonate production affected sources, for pressure relief devices in organic HAP service, keep records of the information specified in paragraphs (f)(1) through (5) of this section, as applicable. ( 1 ) A list of identification numbers for pressure relief devices that the owner or operator elects to equip with a closed

- vent system and control device, under the provisions in paragraph (e)(4) of this section.Page 141 of 197

( 2 ) A list of identification numbers for pressure relief devices subject to the prov isions in paragraph (e)(1) of this section. ( 3 ) A list of identification numbers for pressure relief devices equipped with rupture disks, under the provisions in paragraph (e)(2)( i i) of this section. ( 4 ) The dates and results of the monitoring following a pressure release for each pressure relief device subject to the provisions in paragraph (e)( 1 ) and ( 2 ) of this section. The results shall include: ( i ) The background level measured during each compliance
test. ( ii ) The maximum instrument reading measured at each piece of equipment during each compliance test. ( 5 ) For pressure relief devices in organic HAP service subject to paragraph (e)(3) of this section, keep records of each pressure release to the atmosphere, including the following information: (i) Th e source, nature, and cause of the pressure release. (ii) The date, time, and duration of the pressure release. (iii) An estimate of the quantity of total HAP emitted during the pressure release and the calculations used for determining this quantity. (iv) The actions taken to prevent this pressure release.Page 142 of 197

(v) The measures adopted to prevent future such pressure releases. (g) Periodic reports. For owners or operators of an acrylic and modacrylic fiber production affected source or polycarbonate production affected source subject to paragraph (e) of this section, Periodic Reports must include the information specified in paragraphs (f)(1) through (3) of this section for pressure relief devices in organic HAP service. (1) For pressure relief devices in organi c HAP service subject to paragraph (e) of this section, report confirmation that all monitoring to show compliance was conducted within the reporting period. (2) For pressure relief devices in organic HAP gas or vapor service subject to paragraph (e)(2) of this section, report any instrument reading of 500 ppm above background or greater, more than 5 days after the relief device returns to organic HAP gas or vapor service after a pressure release. (3) For pressure relief devices in organic HAP service subje ct to paragraph (e)(3) of this section, report each pressure release to the atmosphere, including the following information: (i) The source, nature, and cause of the pressure release. (ii) The date, time, and duration of the pressure release.Page 143 of 197

(iii) An esti mate of the quantity of total HAP emitted during the pressure release and the method used for determining this quantity. (iv) The actions taken to prevent this pressure release. (v) The measures adopted to prevent future such pressure releases. §63.1108 Co mpliance with standards and operation and maintenance requirements. (a) Requirements
. The requirements of paragraph s (a) (1), (2), and (5) of this section apply to all affected sources except acrylic and modacrylic fiber production affected sources and polycarbonate production affected sources. The requirements of paragraph (a)(4) of this section appl y only to acrylic and modacrylic fiber production affected sources and polycarbonate production affected sources. The requirements of paragraphs (a)(3), ( 6 ) , and (7) of this section apply to all affected

sources. (1) Except as provided in paragraph (a)(2) of this section, the emission limitations and established parameter ranges of this part shall apply at all times except during periods of startup, shutdown, malfunction, or non

- operation of the affected source (or specific portion thereof) resulting in cessation of the emissions to which this subpart applies. However, if a startup, shutdown, malfunction or period of non

- operation of onePage 144 of 197

portion of an affected source does not affect the ability of a particular emission point to comply with the specific provisions to which it is subject, then that emission point shall still be required to comply with the applicable provisions of this subpart and any of the subpa rts that are referenced by this subpart during startup, shutdown, malfunction, or period of non

operation. (2) If equipment leak requirements are referenced by this subpart for a subject source category, such requirements shall apply at all times except du ring periods of startup, shutdown, or malfunction, process unit shutdown (as defined in §63.1101),

or non - operation of the affected source (or specific portion thereof) in which the lines are drained and depressurized resulting in cessation of the emission s to which the equipment leak requirements apply. (3) For batch unit operations, shutdown does not include the normal periods between batch cycles; and startup does not include the recharging of batch unit operations, or the transitional conditions due to changes in product. (4) (i) For acrylic and modacrylic fiber production affected sources and polycarbonate production affected sources, the emission limitations and established parameter ranges of this part shall apply at all times except during periods of non operation of the affected source (or specific portion thereof)Page 145 of 197

resulting in cessation of the emissions to which this subpart applies. Equipment leak requirements shall apply at all times except during periods of non

- operation of the affected source (or specific portion thereof) in which the lines are drained and depressurized resulting in cessation of the emissions to which the equipment leak requirements apply. (ii) General duty . At all times, the owner or operator must operate and maintain any affecte d source, including associated air pollution control equipment and monitoring equipment, in a manner consistent with safety and good air pollution control practices for minimizing emissions. The general duty to minimize emissions does not require the owner operator to make any further efforts to reduce emissions if levels required by the applicable standard have been achieved. Determination of whether a source is operating in compliance with operation and maintenance requirements will be based on information available to the Administrator, which may include, but is not limited to, monitoring results, review of operation and maintenance procedures, review of operation and maintenance records, and inspection of the source. [Reserved] (5) During startu ps, shutdowns, and malfunctions when the emission standards of this subpart and the subparts referenced by this subpart do not apply pursuant to paragraphs (a)(1) through ( 4 3 ) of this section, the owner or operator shallPage 146 of 197

implement, to the extent reasonably available, measures to prevent or minimize excess emissions. The measures to be taken shall be identified in the startup, shutdown, and malfunction plan (if applicable), and may include, but are not limited to, air pollution control technologies, recovery technologies, work practices, pollution prevention, monitoring, and/or changes in the manner of operation of the affected source. Back

- up control devices are not required, but may be used if available. Compliance with an inadequate startup, shutdown, and malfunction plan developed pursuant to §63.1111 is not a shield for failing to comply with good operation and maintenance requirements. (6) Malfunctions shall be corrected as soon as practical after their occurrence. (7) Operation and maintenance requireme nts established pursuant to section 112 of the Act are enforceable, independent of emissions limitations or other requirements in relevant standards. (b) Compliance assessment procedures

— (1) Parameter monitoring: compliance with operating conditions
. Comp liance with the required operating conditions for the monitored control devices or recovery devices may be determined by, but is not limited to, the parameter monitoring data for emission points that are required to perform continuous monitoring. For each excursion except for excused excursions (as described inPage 147 of 197

§63.998(b)(6)(ii)), and as provided for in paragraph (b)(2) of this section the owner or operator shall be deemed to have failed to have applied the control in a manner that achieves the required ope rating conditions. (2) Parameter monitoring: Excursions
. An excursion is not a violation in cases where continuous monitoring is required and the excursion does not count toward the number of excused excursions (as described in §63.998(b)(6)(ii)), if the conditions of paragraph (b)(2)(i) or (ii) of this section are
met , except that the conditions of paragraph (b)(2)(i) of this section do not apply for acrylic and modacrylic fiber production affected sources and polycarbonate production affected sources
. No thing in this paragraph shall be construed to allow or excuse a monitoring parameter excursion caused by any activity that violates other applicable provisions of this subpart or a subpart referenced by this subpart. (i) During periods of startup, shutdown , or malfunction (and the source is operated during such periods in accordance with §63.1111(a)), or (ii) During periods of non

- operation of the affected source or portion thereof (resulting in cessation of the emissions to which the monitoring applies). ( 3) Operation and maintenance procedures
. Determination of whether acceptable operation and maintenance procedures arePage 148 of 197

being used will be based on information available to the Administrator. This information may include, but is not limited to, monitoring re sults, review of operation and maintenance procedures (including the startup, shutdown, and malfunction plan under §63.1111), review of operation and maintenance records, and inspection of the affected source, and alternatives approved as specified in §63. 1113. (4) Applicability and compliance assessment procedures
. Applicability and compliance with standards shall be governed by, in part, but not limited to, the use of data, tests, and requirements according to paragraphs (b)(4)(i) through (iii) of this section. Compliance with design, equipment, work practice, and operating standards, including those for equipment leaks, shall be determined according to paragraph (b)(5) of this section. (i) Applicability assessments
. Unless otherwise specified in a relev ant test method required to assess control applicability, each test shall consist of three separate runs using the applicable test method. Each run shall be conducted for the time and under the conditions specified in this subpart. The arithmetic mean of t he results of the three runs shall apply when assessing applicability. Upon receiving approval from the Administrator, results of a test run may be replaced with results of an additional test run if it meets the criteriaPage 149 of 197

specified in paragraphs (a)(4)(i)(A ) through (D) of this section. (A) A sample is accidentally lost after the testing team leaves the site; or (B) Conditions occur in which one of the three runs must be discontinued because of forced shutdown; or (C) Extreme meteorological conditions occur; (D) Other circumstances occur that are beyond the owner or operator's control. (ii) Performance test
. The Administrator may determine compliance with emission limitations of this subpart based on, but not limited to, the results of performance tests condu cted according to the procedures specified in §63.997 of this part, unless otherwise specified in this subpart or a subpart referenced by this subpart. For acrylic and modacrylic fiber production affected sources and polycarbonate production affected sourc es, performance tests shall be conducted under such conditions as the Administrator specifies to the owner or operator based on representative performance of the affected source for the period being tested. Representative conditions exclude periods of star tup and shutdown unless specified by the Administrator or an applicable subpart. The owner/operator may not conduct performance tests during periods of malfunction. The owner operator must record the process information that isPage 150 of 197

necessary to document operat ing conditions during the test and include in such record an explanation to support that such conditions represent normal operation. Upon request, the owner or operator shall make available to the Administrator such records as may be necessary to determine the conditions of performance tests. (iii) Operation and maintenance requirements
. The Administrator may determine compliance with the operation and maintenance standards of this subpart by, but not limited to, evaluation of an owner or operator's conform ance with operation and maintenance requirements, including the evaluation of monitoring data, as specified in this subpart or a subpart referenced by this subpart. (5) Design, equipment, work practice, or operational standards
. The Administrator may deter mine compliance with design, equipment, work practice, or operational requirements by, but is not limited to, review of records, inspection of the affected source, and by evaluation of an owner or operator's conformance with operation and maintenance requi rements as specified in this subpart, and in the subparts referenced by this subpart. (c) Finding of compliance
. The Administrator may make a finding concerning an affected source's compliance with an emission standard or operating and maintenance requirem ent asPage 151 of 197

specified in, but not limited to, paragraphs (a) and (b) of this section, upon obtaining all of the compliance information required by the relevant standard (including the written reports of performance test results, monitoring results, and other in formation, if applicable) and any information available to the Administrator to determine whether proper operation and maintenance practices are being used. Standards in this subpart and methods of determining compliance are in metric units followed by the equivalents in English units. The Administrator will make findings of compliance with the numerical standards of this subpart using metric units. (d) Compliance time
. All terms that define a period of time for completion of required tasks (e.g., weekly, m onthly, quarterly, annually), unless specified otherwise in the section or subsection that imposes the requirement, refer to the standard calendar periods. (1) Notwithstanding time periods specified for completion of required tasks, time periods may be cha nged by mutual agreement between the owner or operator and the Administrator, as specified in §63.1110(h). For each time period that is changed by agreement, the revised period shall remain in effect until it is changed. A new request is not necessary for each recurring period.Page 152 of 197

(2) When the period specified for compliance is a standard calendar period, if the initial compliance date occurs after the beginning of the period, compliance shall be required according to the schedule specified in paragraph (d)(2) (i) or (ii) of this section, as appropriate. (i) Compliance shall be required before the end of the standard calendar period within which the compliance deadline occurs, if there remain at least 3 days for tasks that must be performed weekly, at least 2 w eeks for tasks that must be performed monthly, at least 1 month for tasks that must be performed each quarter, or at least 3 months for tasks that must be performed annually; or (ii) In all other cases, compliance shall be required before the end of the fi rst full standard calendar period after the period within which the initial compliance deadline occurs. (3) In all instances where a provision requires completion of a task during each of multiple successive periods, an owner or operator may perform the re quired task at any time during the specified period, provided the task is conducted at a reasonable interval after completion of the task during the previous period. §63.1109 Recordkeeping requirements. (a) Maintaining notifications, records, and reports
. Except as provided in paragraph (b) of this section, the owner orPage 153 of 197

operator of each affected source subject to this subpart shall keep copies of notifications, reports and records required by this subpart and subparts referenced by this subpart for at least 5 years, unless otherwise specified under this subpart. (b) Copies of reports
. If the Administrator has waived the requirement of §63.1110(g)(1) for submittal of copies of reports, the owner or operator is not required to maintain copies of the waived rep orts. This paragraph applies only to reports and not the underlying records that must be maintained as specified in this subpart and the subparts referenced by this subpart. (c) Availability of records
. All records required to be maintained by this subpart or a subpart referenced by this subpart shall be maintained in such a manner that they can be readily accessed and are suitable for inspection. The records of the remaining 3 years, where required, may be retained offsite. Records may be maintained in har d copy or computer

- readable form including, but not limited to, on paper, microfilm, computer, computer disk, magnetic tape, or microfiche. (d) Control applicability records
. Owners or operators shall maintain records containing information developed and u sed to assess control applicability under §63.1103 (e.g., combined total annual emissions of regulated organic HAP). §63.1110 Reporting requirements.Page 154 of 197

(a) Required reports
. Each owner or operator of an affected source subject to this subpart shall submit th e reports listed in paragraphs (a)(1) through (8) of this section, as applicable. Each owner or operator of an acrylic and modacrylic fiber production affected source or polycarbonate production affected

source subject to this subpart shall submit the reports listed in paragraph (a)(9) of this section, as applicable. (1) A Notification of Initial Startup described in paragraph (b) of this section, as applicable. (2) An Initial Notification described in paragraph (c) of this section. (3) [Reserved] (4) A Notification of Compliance Status report described in paragraph (d) of this section. (5) Periodic Reports described in paragraph (e) of this section. (6) Application for approval of construction or reconstruction described in §63.5(d) of subpart A of this part. (7) Startup, Shutdown, and Malfunction Reports described in §63.1111 of this subpart (except for acrylic and modacrylic fiber production affected sources and polycarbonate production affected sources)
.Page 155 of 197

(8) O ther reports. Other reports shall be submitted as specified elsewhere in this subpart and subparts referenced by this subpart. (9) Electronic reporting
. Within 60 days after the date of completing each performance test (as defined in § 63.2), the

owner or operator must submit the results of the performance tests, including any associated fuel analyses, required by this subpart according to the methods specified in paragraph (a)(9)(i) or (ii) of this section. (i) For data collected using test methods support ed by the
EPA

- provided software, the owner or operator shall submit the results of the performance test to the EPA by direct computer

to

- computer electronic transfer via EPA

- provided software, unless otherwise approved by the Administrator. Owners or
opera tors, who claim that some of the information being submitted for performance tests is confidential business information (CBI), must submit a complete file using EPA

provided software that includes information claimed to be CBI on a compact dis c , flash driv e, or other commonly used electronic storage media to the EPA. The electronic media must be clearly marked as CBI and mailed to U.S. EPA/OAPQS/CORE CBI Office, Attention: WebFIRE Administrator, MD C404

- 02, 4930 Old Page Rd., Durham, NC 27703. The same file with the CBI omitted must bePage 156 of 197

submitted to the EPA by direct computer

- to

- computer electronic transfer via EPA

- provided software. (ii) For any performance test conducted using test methods that are not compatible with the EPA

- provided software, the

owner or operator shall submit the results of the performance test to the Administrator at the appropriate address listed in § 60.4. (b) Notification of initial startup

— (1) Contents . An owner or operator of an affected source for which a notice of initial startup has not been submitted under §63.5, shall send the Administrator written notification of the actual date of initial startup of an affected source. This paragraph does not apply to an affected source in existence on the effective date of this rule. (2) Due date
. The notification of the actual date of initial startup shall be postmarked within 15 days after such date. (c) Initial Notification
. Owners or operators of affected sources who are subject to this subpart shall notify the Administrator of the applic ability of this subpart by submitting an Initial Notification according to the schedule described in paragraph (c)(1) of this section. The notice shall include the information specified in paragraphs (c)(2) through (7) of this section, as applicable. An ap plication for approval ofPage 157 of 197

construction or reconstruction required under §63.5(d) of subpart A of this part may be used to fulfill the initial notification requirements. (1) The initial notification shall be postmarked within 1 year after the source becomes subject to this subpart. (2) Identification of the storage vessels subject to this subpart. (3) Identification of the process vents subject to this subpart. (4) Identification of the transfer racks subject to this subpart. (5) For equipment leaks, identif ication of the process units subject to this subpart. (6) Identification of other equipment or emission points subject to this subpart. (7) As an alternative to the requirements specified in paragraphs (c)(1) through (3) and (c)(5) of this section,
process units can be identified instead of individual pieces of equipment. For this alternative, the kind of emission point in the process unit that will comply must also be identified. (d) Notification of Compliance Status

— (1) Contents . The owner or operator sh all submit a Notification of Compliance Status for each affected source subject to this subpart containing the information specified in paragraphs (d)(1)(i) andPage 158 of 197

(d)(1)(ii) of this section. For pressure relief devices subject to the requirements of § 63.110 7(e) (3) , the owner or operator of an acrylic and modacrylic fiber production affected source or polycarbonate production affected source shall submit the information listed in paragraph (d)(1)(iii) of this section in the Notification of Compliance Status w ithin 150 days after the first applicable compliance date for pressure relief device monitoring. (i) The Notification of Compliance Status shall include the information specified in this subpart and the subparts referenced by this subpart. Alternatively, t his information can be submitted as part of a title V permit application or amendment. (ii) The Notification of Compliance Status shall include a statement from the owner or operator identifying which subpart he or she has elected to comply with, where giv en a choice, as provided for in §63.1100(g). (iii) For pressure relief devices in organic HAP service, a description of the device or monitoring system to be implemented, including the pressure relief devices and process parameters to be monitored (if appl icable) , and a description of the alarms or other methods by which operators will be notified of a pressure release.Page 159 of 197

(2) Due date
. The owner or operator shall submit the Notification of Compliance Status for each affected source 240 days after the complian ce date specified for the affected source under this subpart, or 60 days after completion of the initial performance test or initial compliance assessment, whichever is earlier. Notification of Compliance Status reports may be combined for multiple affecte d sources as long as the due date requirements for all sources covered in the combined report are
met. (e) Periodic Reports
. The owner or operator of an affected source subject to monitoring requirements of this subpart, or to other requirements of this su bpart or subparts referenced by this subpart, where periodic reporting is specified, shall submit a Periodic Report. (1) Contents . Periodic Reports shall include all information specified in this subpart and subparts referenced by this subpart. (2) Due date
. The Periodic Report shall be submitted no later than 60 days after the end of each 6

- month period. The first report shall cover the 6

- month period after the Notification of Compliance Status report is due. The first report shall be submitted no later than the last day of the month that includes the date 8 months (6 months and 60 days) after the Notification of Compliance Status report is due.Page 160 of 197

(3) Overlap with title V reports
. Information required by this subpart, which is submitted with a title V periodic report, need not also be included in a subsequent Periodic Report required by this subpart or subpart referenced by this subpart. The title V report shall be referenced in the Periodic Report required by this subpart. (f) General report content
. A ll reports and notifications submitted pursuant to this subpart, including reports that combine information required under this subpart and a subpart referenced by this subpart, shall include the information specified in paragraphs (f)(1) through (4) of th is section. (1) The name, address and telephone number (fax number may also be provided) of the owner or operator. (2) The name, address and telephone number of the person to whom inquiries should be addressed, if different than the owner or operator. (3) The address (physical location) of the reporting facility. (4) Identification of each affected source covered in the submission and identification of the subparts (this subpart and the subparts referenced in this subpart) that are applicable to that affect ed source. Summaries and groupings of this information are permitted.Page 161 of 197

(g) Report and notification submission

— (1) Submission to the Environmental Protection Agency
. All reports and notifications required under this subpart shall be sent to the appropriate EPA Regional Office and to the delegated State authority, except that request for permission to use an alternative means of emission limitation as provided for in §63.1113 shall be submitted to the Director of the EPA Office of Air Quality Planning and Sta ndards, U.S. Environmental Protection Agency, MD

– 10, Research Triangle Park, North Carolina, 27711. The EPA Regional Office may waive the requirement to submit a copy of any reports or notifications at its discretion. (2) Submission of copies
. If any State requires a notice that contains all the information required in a report or notification listed in this subpart, an owner or operator may send the appropriate EPA Regional Office a copy of the report or notification sent to the State to satisfy the requir ements of this subpart for that report or notification. (3) Method of submission
. Wherever this subpart specifies “postmark” dates, submittals may be sent by methods other than the U.S. Mail (e.g., by fax or courier). Submittals shall be sent on or before the specified date.Page 162 of 197

(4) Submission by electronic media
. If acceptable to both the Administrator and the owner or operator of an affected source, reports may be submitted on electronic media. (h) Adjustment to timing of submittals and review of required com munications

— (1) Alignment with title V submission
. An owner or operator may submit Periodic Reports required by this subpart on the same schedule as the title V periodic report for the facility. The owner or operator using this option need not obtain prior approval, but must ensure that no reporting gaps occur. The owner or operator shall clearly identify the change in reporting schedule in the first report filed under this paragraph. The requirements of paragraph (f) of this section are not waived when imp lementing this change. (2) Establishment of a common schedule
. An owner or operator may arrange by mutual agreement (which may be a standing agreement) with the Administrator a common schedule on which periodic reports required by this subpart shall be sub mitted throughout the year as long as the reporting period is not extended. Procedures governing the implementation of this provision are specified in paragraphs (h)(3) through (7) of this section. (3) Submission requirements
. Except as allowed by paragrap h (h)(1) of this section, until an adjustment of a time period or postmark deadline has been approved by the Administrator underPage 163 of 197

paragraphs (h)(5) and (6) of this section, the owner or operator of an affected source remains strictly subject to the required submittal deadlines specified in this subpart and subparts referenced by this subpart. (4) Request for adjustment of reporting schedule
. Except as allowed by paragraph (h)(1) of this section, an owner or operator shall request the adjustment provided for in paragraphs (h)(5) and (6) of this section each time he or she wishes to change an applicable time period or postmark deadline specified in this subpart or subparts referenced by this subpart. A request for a change to the periodic reporting schedule nee d only be made once for every schedule change and not once for every semiannual report submitted. (5) Alteration of time periods or deadlines
. Notwithstanding time periods or postmark deadlines specified in this subpart for the submittal of information to the Administrator by an owner or operator, or the review of such information by the Administrator, such time periods or deadlines may be changed by mutual agreement between the owner or operator and the Administrator. An owner or operator who wishes to
req uest a change in a time period or postmark deadline for a particular requirement shall request the adjustment in writing as soon as practical before the subject activity is required to take place. The owner or operator shall include in the requestPage 164 of 197

whatever information he or she considers useful to convince the Administrator that an adjustment is warranted. (6) Approval of request for adjustment
. If, in the Administrator's judgment, an owner or operator's request for an adjustment to a particular time period or postmark deadline is warranted, the Administrator will approve the adjustment. The Administrator will notify the owner or operator in writing of approval or disapproval of the request for an adjustment within 15 calendar days of receiving sufficient in formation to evaluate the request. (7) Notification of delay
. If the Administrator is unable to meet a specified deadline, he or she will notify the owner or operator of any significant delay and inform the owner or operator of the amended schedule. §63.11 11 Startup, shutdown, and malfunction. (a) Startup, shutdown, and malfunction plan
. The requirements of this paragraph (a) apply to all affected sources except for acrylic and modacrylic fiber production affected sources and polycarbonate production affected sources.

— (1) Description and purpose of plan
. The owner or operator of an affected source shall develop a written startup, shutdown, and malfunction plan that describes, in detail, procedures for operating and maintaining the affected source duri ng periods of startup, shutdown, and malfunction. This plan shall also includePage 165 of 197

a program of corrective action for malfunctioning process and air pollution control equipment used to comply with relevant standards under this subpart. The plan shall also addr ess routine or otherwise predictable CPMS malfunctions. This plan shall be developed by the owner or operator by the affected source's compliance date under this subpart. The requirement to develop this plan shall be incorporated into the source's title
V permit. This requirement is optional for equipment that must comply with subparts TT or UU under this subpart. It is not optional for equipment equipped with a closed vent system and control device subject to this subpart and subpart SS of this part. The p urpose of the startup, shutdown, and malfunction plan is described in paragraphs (a)(1)(i) and (ii) of this section. (i) To ensure that owners or operators are prepared to correct malfunctions as soon as practical after their occurrence, in order to minimi ze excess emissions of regulated organic HAP; and (ii) To reduce the reporting burden associated with periods of startup, shutdown, and malfunction (including corrective action taken to restore malfunctioning process and air pollution control equipment to its normal or usual manner of operation). (2) Operation of source. During periods of startup, shutdown, and malfunction, the owner or operator of an affected source subject to this subpart YY shall operate and maintainPage 166 of 197

such affected source (including assoc iated air pollution control equipment and CPMS) in a manner consistent with safety and good air pollution control practices for minimizing emissions to the extent practical. The general duty to minimize emissions during a period of startup, shutdown, or ma lfunction does not require the owner or operator to achieve emission levels that would be required by the applicable standard at other times if this is not consistent with safety and good air pollution control practices, nor does it require the owner or op erator to make any further efforts to reduce emissions if levels required by the applicable standard have been achieved. Determination of whether such operation and maintenance procedures are being used will be based on information available to the Adminis trator which may include, but is not limited to, monitoring results, review of operation and maintenance procedures (including the startup, shutdown, and malfunction plan required by this section), review of operation and maintenance records, and inspectio n of the

source. (3) Use of additional procedures
. To satisfy the requirements of this section to develop a startup, shutdown, and malfunction plan, the owner or operator of an affected source may use the affected source's standard operating procedures (SO P) manual, or an Occupational Safety and Health Administration (OSHA) or other plan, provided the alternativePage 167 of 197

plans meet all the requirements of this section and are made available for inspection when requested by the Administrator. (4) Revisions to the pl an . Based on the results of a determination made under §63.1108(b)(3), the Administrator may require that an owner or operator of an affected source make changes to the startup, shutdown, and malfunction plan for that source. The Administrator may require reasonable revisions to a startup, shutdown, and malfunction plan if the Administrator finds that the plan is inadequate as specified in paragraphs (a)(4)(i) through (iv) of this section: (i) Does not address a startup, shutdown, and malfunction event of t he CPMS, the air pollution control equipment, or the affected source that has occurred; or (ii) Fails to provide for the operation of the affected source (including associated air pollution control equipment and CPMS) during a startup, shutdown, and malfun ction event in a manner consistent with good air pollution control practices for minimizing emissions to the extent practical; or (iii) Does not provide adequate procedures for correcting malfunctioning process and air pollution control equipment as quickl y as practicable; or (iv) Does not provide adequate measures to prevent or minimize excess emissions to the extent practical as specified in §63.1108(a)(5).Page 168 of 197

(5) Additional malfunction plan requirements
. If the startup, shutdown, and malfunction plan fails to address or inadequately addresses an event that meets the characteristics of a malfunction but was not included in the startup, shutdown, and malfunction plan at the time the owner or operator developed the plan, the owner or operator shall revise the s tartup, shutdown, and malfunction plan within 45 days after the event to include detailed procedures for operating and maintaining the affected source during similar malfunction events and a program of corrective action for similar malfunctions of process or air pollution control equipment or CPMS. (b) Startup, shutdown, and malfunction reporting requirements
. The requirements of the paragraph (b) apply to all affected sources except for acrylic and modacrylic fiber production affected sources and polycarbo nate production affected sources.

— (1) Periodic startup, shutdown, and malfunction reporting requirements
. If actions taken by an owner or operator during a startup, shutdown, and malfunction of an affected source, or of a control device or monitoring system required for compliance (including actions taken to correct a malfunction) are consistent with the proce dures specified in the affected source's plan, then the owner or operator shall state such information in a startup, shutdown, and malfunction report.Page 169 of 197

During the reporting period, reports shall only be required for startups, shutdowns, and malfunctions dur ing which excess emissions, as defined in §63.1108(a)(5), occur during the reporting period. A startup, shutdown, and malfunction report can be submitted as part of a Periodic Report required under §63.1110(a)(5), or on a more frequent basis if specified

o therwise under this subpart or a subpart referenced by this subpart or as established otherwise by the permitting authority in the affected source's title V permit. The startup, shutdown, and malfunction report shall be delivered or postmarked by the 30th day following the end of each calendar half (or other calendar reporting period, as appropriate), unless the information is submitted with the Periodic Report. The report shall include the information specified in paragraphs (b)(1)(i) through (b)(1)(iv) of this section. (i) The name, title, and signature of the owner or operator or other responsible official certifying its accuracy. (ii) The number of startup, shutdown, and malfunction events and the total duration of all periods of startup, shutdown, and m alfunction for the reporting period if the total duration amounts to either of the durations in paragraphs (b)(1)(ii)(A) or (B) of this section. Records of the number of CPMS startup, shutdown, and malfunction events and the total duration of all periods o f startup, shutdown, and malfunctionPage 170 of 197

for the reporting period are required under §63.998(c)(1)(ii)(C) and (D) of this section. (A) Total duration of periods of malfunctioning of a CPMS equal to or greater than 5 percent of that CPMS operating time for the reporting period; or (B) Total duration of periods of startup, shutdown, and malfunction for an affected source equal to or greater than 1 percent of that affected source's operating time for the reporting period. (iii) Records documenting each startup, sh utdown and malfunction event as required under §63.998(c)(1)(ii)(F). (iv) Records documenting the total duration of operating time as required under §63.998(c)(1)(ii)(H). (2) Immediate startup, shutdown, and malfunction reports
. Notwithstanding the allowan ce to reduce the frequency of reporting for startup, shutdown, and malfunction reports under paragraph (b)(1) of this section, any time an action taken by an owner or operator during a startup, shutdown, or malfunction (including actions taken to correct a malfunction) during which excess emissions occur is not consistent with the procedures specified in the affected source's plan, the owner or operator shall report the actions taken for that event within 2 working days after commencing actions inconsistent with the plan, followed by a letter delivered or postmarked within 7 workingPage 171 of 197

days after the end of the event. The immediate report required under this paragraph shall contain the name, title, and signature of the owner or operator or other responsible off icial who is certifying its accuracy, explaining the circumstances of the event, the reasons for not following the startup, shutdown, and malfunction plan, and whether any excess emissions and/or parameter monitoring exceedances are believed to have occurr ed. Notwithstanding the requirements of the previous sentence, after the effective date of an approved permit program in the State in which an affected source is located, the owner or operator may make alternative reporting arrangements, in advance, with t he permitting authority in that State. Procedures governing the arrangement of alternative reporting requirements under this paragraph are specified in §63.1110(h). (3) [Reserved] (c) Malfunction recordkeeping and reporting
. The requirements of this paragra ph (c) apply only to acrylic and modacrylic fiber production affected sources and polycarbonate production affected sources. ( 1 ) Records of malfunctions
. The owner or operator shall keep the records specified in paragraphs ( c )(1)(i) through ( i i i ) of this section. (i) In the event that an affected unit fails to meet an applicable standard, record the number of failures. For each failure record the date, time, and duration of each failure.Page 172 of 197

(ii) For each failure to meet an applicable standard, record and reta in a list of the affected sources or equipment, an estimate of the volume of each regulated pollutant emitted over any emission limit, and a description of the method used to estimate the emissions. (iii) Record actions taken to minimize emissions in accordance with § 63.1108(a)(4)(ii), and any corrective actions taken to return the affected unit to its normal or usual manner of operation. ( 2 ) Reports of malfunctions
. If a source fails to meet an applicable standard, report such events in the Periodic Report. Report the number of failures to meet an applicable standard. For each instance, report the date, time and duration of each failure. For each failure the report must include a list of the affected sources or equipment, an estimate of the volume of each regulated pollutant emitted over any emission limit, and a description of the method used to estimate the emissions. §63.1112 Extension of compliance, and performance test, monitoring, recordkeeping and reporting waivers and alternatives. (a) Extensio n of compliance

— (1) Extension of compliance with emission standards
. Until an extension of compliance has been granted by the Administrator under this paragraph, the owner or operator of an affected source subject to thePage 173 of 197

requirements of this subpart shall comply with all applicable requirements of this subpart. (2) Extension of compliance for early reductions and other reductions
. (i) Early reductions
. Pursuant to section 112(i)(5) of the Act, if the owner or operator of an existing source demonstrates tha t the source has achieved a reduction in emissions of hazardous air pollutants in accordance with the provisions of subpart D of this part, the Administrator will grant the owner or operator an extension of compliance with specific requirements of this par t, as specified in subpart D of this part. (ii) Other reductions
. Pursuant to section 112(i)(6) of the Act, if the owner or operator of an existing source has installed best available control technology (BACT) (as defined in section 169(3) of the Act) or t echnology required to meet a lowest achievable emission rate (LAER) (as defined in section 171 of the Act) prior to the promulgation of an emission standard in this part applicable to such source and the same pollutant (or stream of pollutants) controlled pursuant to the BACT or LAER installation, the Administrator will grant the owner or operator an extension of compliance with such emission standard that will apply until the date 5 years after the date on which such installation was achieved, as determine d by the Administrator.Page 174 of 197

(3) Request for extension of compliance
. Paragraphs (a)(4) through (7) of this section concern requests for an extension of compliance with a relevant standard under this part (except requests for an extension of compliance under pa ragraph (a)(2)(i) of this section will be handled through procedures specified in subpart D of this part). (4) Requests for extensions of compliance for section 112 standards
. (i) Section 112(d) standards
. (A) The owner or operator of an existing source wh o is unable to comply with a relevant standard established under this part pursuant to section 112(d) of the Act may request that the Administrator grant an extension allowing the source up to 1 additional year to comply with the standard, if such addition al period is necessary for the installation of controls. The owner or operator of an affected source who has requested an extension of compliance under this paragraph and who is otherwise required to obtain a title V permit shall apply for such permit or a pply to have the source's title V permit revised to incorporate the conditions of the extension of compliance. The conditions of an extension of compliance granted under this paragraph will be incorporated into the affected source's title V permit accordin g to the provisions of part 70 or Federal title V regulations in this chapter (42 U.S.C. 7661), whichever are applicable.Page 175 of 197

(B) Any request under this paragraph for an extension of compliance with a relevant standard shall be submitted in writing to the appr opriate authority not later than 12 months before the affected source's compliance date (as specified in §63.1102) for sources that are not including emission points in an emissions average, or not later than 18 months before the affected source's complian ce date (as specified in §63.1102) for sources that are including emission points in an emissions average. Emission standards established under this part may specify alternative dates for the submittal of requests for an extension of compliance if alternat ives are appropriate for the source categories affected by those standards, e.g., a compliance date specified by the standard is less than 12 (or 18) months after the standard's effective date. (ii) Section 112(f) standards
. The owner or operator of an exi sting source unable to comply with a relevant standard established under this part pursuant to section 112(f) of the Act may request that the Administrator grant an extension allowing the source up to 2 years after the standard's effective date to comply w ith the standard. The Administrator may grant such an extension if he/she finds that such additional period is necessary for the installation of controls and that steps will be taken during the period of the extension to assure that the health of persons w ill be protected from imminent endangerment.Page 176 of 1 97

Any request for an extension of compliance with a relevant standard under this paragraph shall be submitted in writing to the Administrator not later than 15 days after the effective date of the relevant standar d. (5) Requests for extensions of compliance for BACT or LAER
. The owner or operator of an existing source who has installed BACT or technology required to meet LAER (as specified in paragraph (a)(2)(ii) of this section) prior to the promulgation of a rele vant emission standard in this part may request that the Administrator grant an extension allowing the source 5 years from the date on which such installation was achieved, as determined by the Administrator, to comply with the standard. Any request for an extension of compliance with a relevant standard under this paragraph shall be submitted in writing to the Administrator not later than 120 days after the promulgation date of the standard. The Administrator may grant such an extension if he or she finds that the installation of BACT or technology to meet LAER controls the same pollutant (or stream of pollutants) that would be controlled at that source by the relevant emission standard. (6) Contents of request
. (i) The request for a compliance extension un der paragraph (a)(4) of this section shall include the following information:Page 177 of 197

(A) A description of the controls to be installed to comply with the standard; (B) A compliance schedule, including the date by which each step toward compliance will be reached. At a minimum, the list of dates shall include: ( 1 ) The date by which contracts for emission control systems or process changes for emission control will be awarded, or the date by which orders will be issued for the purchase of component parts to accompli sh emission control or process changes; ( 2 ) The date by which on

- site construction, installation of emission control equipment, or a process change is to be initiated; ( 3 ) The date by which on

- site construction, installation of emission control equipment, or a process change is to be completed; and ( 4 ) The date by which final compliance is to be achieved. (C) A description of interim emission control steps, that will be taken during the extension period, including milestones to assure proper operation and m aintenance of emission control and process equipment; and (D) Whether the owner or operator is also requesting an extension of other applicable requirements (e.g., performance testing requirements).Page 178 of 197

(ii) The request for a compliance extension under paragra ph (a)(5) of this section shall include all information needed to demonstrate to the Administrator's satisfaction that the installation of BACT or technology to meet LAER controls the same pollutant (or stream of pollutants) that would be controlled at tha t source by the relevant emission standard. (7) Additional advice
. Advice on requesting an extension of compliance may be obtained from the Administrator. (8) Approval of request for extension of compliance
. Paragraphs (a)(9) through (14) of this section c oncern approval of an extension of compliance requested under paragraphs (a)(4) through (6) of this section. (9) General
. Based on the information provided in any request made under paragraphs (a)(4) through (6) of this section, or other information, the A dministrator may grant an extension of compliance with an emission standard, as specified in paragraphs (a)(4) and (5) of this section. (10) Contents of extension
. The extension will be in writing and will

— (i) Identify each affected source covered by the extension; (ii) Specify the termination date of the extension; (iii) Specify the dates by which steps toward compliance are to be taken, if appropriate;Page 179 of 197

(iv) Specify other applicable requirements to which the compliance extension applies (e.g., performance tests); and (v)(A) Under paragraph (a)(4) of this section, specify any additional conditions that the Administrator deems necessary to assure installation of the necessary controls and protection of the health of persons during the extension period; or (B ) Under paragraph (a)(5)of this section, specify any additional conditions that the Administrator deems necessary to assure the proper operation and maintenance of the installed controls during the extension period. (11) Progress reports . The owner or oper ator of an existing source that has been granted an extension of compliance under paragraph (a)(10) of this section may be required to submit to the Administrator progress reports indicating whether the steps toward compliance outlined in the compliance sc hedule have been reached. The contents of the progress reports and the dates by which they shall be submitted will be specified in the written extension of compliance granted under paragraph (a)(9) of this section. (12) Notifications to owners and operator s regarding compliance extensions for section 112(d) standards
. (i) The Administrator will notify the owner or operator in writing of approval or intention to deny approval of a request for an extension of compliance within 30 days after receipt ofPage 180 of 197

suffici ent information to evaluate a request submitted under paragraph (a)(4)(i) or (a)(5) of this section. The 30

- day approval or denial period will begin after the owner or operator has been notified in writing that his/her application is complete. The Administ rator will notify the owner or operator in writing of the status of his/her application, that is, whether the application contains sufficient information to make a determination, within 30 days after receipt of the original application and within 30 days a fter receipt of any supplementary information that is submitted. (ii) When notifying the owner or operator that his/her application is not complete, the Administrator will specify the information needed to complete the application and provide notice of opp ortunity for the applicant to present, in writing, within 30 days after he/she is notified of the incomplete application, additional information or arguments to the Administrator to enable further action on the application. (iii) Before denying any request for an extension of compliance, the Administrator will notify the owner or operator in writing of the Administrator's intention to issue the denial, together with

— (A) Notice of the information and findings on which the intended denial is based; andPage 181 of 197

(B) N otice of opportunity for the owner or operator to present in writing, within 15 days after he/she is notified of the intended denial, additional information or arguments to the Administrator before further action on the request. (iv) The Administrator's fi nal determination to deny any request for an extension will be in writing and will set forth the specific grounds on which the denial is based. The final determination will be made within 30 days after presentation of additional information or argument (if the application is complete), or within 30 days after the final date specified for the presentation if no presentation is made. (13) Notifications to owners and operators regarding compliance extensions for section 112(f) standards
. (i) The Administrator will notify the owner or operator in writing of approval or intention to deny approval of a request for an extension of compliance within 30 days after receipt of sufficient information to evaluate a request submitted under paragraph (a)(4)(ii) of this sec tion. The 30

- day approval or denial period will begin after the owner or operator has been notified in writing that his/her application is complete. The Administrator will notify the owner or operator in writing of the status of his/her application, that i s, whether the application contains sufficient information to make a determination, within 15 days after receipt of the originalPage 182 of 197

application and within 15 days after receipt of any supplementary information that is submitted. (ii) When notifying the owner or operator that his/her application is not complete, the Administrator will specify the information needed to complete the application and provide notice of opportunity for the applicant to present, in writing, within 15 days after he/she is notified of t he incomplete application, additional information or arguments to the Administrator to enable further action on the application. (iii) Before denying any request for an extension of compliance, the Administrator will notify the owner or operator in writing of the Administrator's intention to issue the denial, together with

— (A) Notice of the information and findings on which the intended denial is based; and (B) Notice of opportunity for the owner or operator to present in writing, within 15 days after he/she is notified of the intended denial, additional information or arguments to the Administrator before further action on the request. (iv) A final determination to deny any request for an extension will be in writing and will set forth the specific
gro unds on which the denial is based. The final determination will be made within 30 days after presentation of additional information or argument (if the application is complete), orPage 183 of 197

within 30 days after the final date specified for the presentation if no pr esentation is made. (14) Termination of extension
. The Administrator may terminate an extension of compliance at an earlier date than specified if any specification under paragraphs (a)(10)(iii) or (iv) of this section is not met. (15) [Reserved] (16) Admi nistrator's authority
. The granting of an extension under this section shall not abrogate the Administrator's authority under section 114 of the Act. (b) Waiver of performance tests

— (1) Applicability of this section
. Until a waiver of a performance testin g requirement has been granted by the Administrator under this paragraph, the owner or operator of an affected source remains subject to the requirements of this section. (2) General
. Individual performance tests may be waived upon written application to t he Administrator if, in the Administrator's judgment, the source is meeting the relevant standard(s) on a continuous basis, or the source is being operated under an extension of compliance, or the owner or operator has requested an extension of compliance and the Administrator is still considering that request. (3) Request to waive a performance test
. (i) If a request is made for an extension of compliance under paragraph (a) ofPage 184 of 197

this section, the application for a waiver of an initial performance test shall accompany the information required for the request for an extension of compliance. If no extension of compliance is requested or if the owner or operator has requested an extension of compliance and the Administrator is still considering that request, the application for a waiver of an initial performance test shall be submitted at least 60 days before the performance test if a site

- specific test plan is not submitted. (ii) If an application for a waiver of a subsequent performance test is made, the applic ation may accompany any required compliance progress report, compliance status report, or excess emissions and continuous monitoring system performance report, but it shall be submitted at least 60 days before the performance test if a site

- specific test p lan is not submitted. (iii) Any application for a waiver of a performance test shall include information justifying the owner or operator's request for a waiver, such as the technical or economic infeasibility, or the impracticality, of the affected source performing the required test. (4) Approval of request to waive performance test
. The Administrator will approve or deny a request for a waiver of a performance test made under paragraph (b)(3) of this section when he/she

—Page 185 of 197

(i) Approves or denies an extensi on of compliance under paragraph (a) of this section; or (ii) Approves or disapproves a site

- specific test plan; or (iii) Makes a determination of compliance following the submission of a required compliance status report or excess emissions and continuous monitoring systems performance report;

or (iv) Makes a determination of suitable progress towards compliance following the submission of a compliance progress report, whichever is applicable. (5) Administrator's authority
. Approval of any waiver granted u nder this section shall not abrogate the Administrator's authority under the Act or in any way prohibit the Administrator from later canceling the waiver. The cancellation will be made only after notice is given to the owner or operator of the affected sou rce. (c) Use of an alternative monitoring method

— (1) General
. Until permission to use an alternative monitoring method has been granted by the Administrator under this paragraph, the owner or operator of an affected source remains subject to the requirements of this section and the relevant standard. (2) Alternatives to monitoring methods
. After receipt and consideration of written application, the Administrator mayPage 186 of 197

approve alternatives to any monitoring methods or procedures of this part includin g, but not limited to, the following: (i) Alternative monitoring requirements when installation of a CMS specified by a relevant standard would not provide accurate measurements due to liquid water or other interferences caused by substances within the eff luent gases; (ii) Alternative monitoring requirements when the affected source is infrequently operated; (iii) Alternative monitoring requirements to accommodate CEMS that require additional measurements to correct for stack moisture conditions; (iv) Alter native locations for installing CMS when the owner or operator can demonstrate that installation at alternate locations will enable accurate and representative measurements; (v) Alternate methods for converting pollutant concentration measurements to units of the relevant standard; (vi) Alternate procedures for performing daily checks of zero (low

- level) and high

- level drift that do not involve use of high

- level gases or test cells; (vii) Alternatives to the American Society for Testing and Materials (ASTM) test methods or sampling procedures specified by any relevant standard; (viii) Alternative CMS that do not meet the design or performance requirements in this part, but adequatelyPage 187 of 197

demonstrate a definite and consistent relationship between their

measuremen ts and the measurements of opacity by a system complying with the requirements as specified in the relevant standard. The Administrator may require that such demonstration be performed for each affected source; or (ix) Alternative monitoring requirements w hen the effluent from a single affected source or the combined effluent from two or more affected sources is released to the atmosphere through more than one point. (3) Conflicts between alternative and required methods
. If the Administrator finds reasonable grounds to dispute the results obtained by an alternative monitoring method, requirement, or procedure, the Administrator may require the use of a method, requirement, or procedure specified in this section or in the relevant standard. If the re sults of the specified and alternative method, requirement, or procedure do not agree, the results obtained by the specified method, requirement, or procedure shall prevail. (4)(i) Request to use alternative monitoring method
. An owner or operator who wish es to use an alternative monitoring method shall submit an application to the Administrator as described in paragraph (c)(4)(ii) of this section. The application may be submitted at any time provided that the monitoring method is not used to demonstrate co mpliance with aPage 188 of 197

relevant standard or other requirement. If the alternative monitoring method is to be used to demonstrate compliance with a relevant standard, the application shall be submitted not later than with the site

- specific test plan required, or w ith the site

- specific performance evaluation plan (if requested), or at least 60 days before the performance evaluation is scheduled to begin. (ii) The application shall contain a description of the proposed alternative monitoring system and a performance evaluation test plan, if required. In addition, the application shall include information justifying the owner or operator's request for an alternative monitoring method, such as the technical or economic infeasibility, or the impracticality, of the affect ed source using the required method. (iii) The owner or operator may submit the information required in this paragraph well in advance of the submittal dates specified in paragraph (c)(4)(i) of this section to ensure a timely review by the Administrator in order to meet the compliance demonstration date specified in this section or the relevant standard. (5) Approval of request to use alternative monitoring method
. (i) The Administrator will notify the owner or operator of approval or intention to deny appr oval of the request to use an alternative monitoring method within 30 days after receipt ofPage 189 of 197

the original request and within 30 days after receipt of any supplementary information that is submitted. Before disapproving any request to use an alternative moni toring method, the Administrator will notify the applicant of the Administrator's intention to disapprove the request together with

— (A) Notice of the information and findings on which the intended disapproval is based; and (B) Notice of opportunity for th e owner or operator to present additional information to the Administrator before final action on the request. At the time the Administrator notifies the applicant of his or her intention to disapprove the request, the Administrator will specify how much t ime the owner or operator will have after being notified of the intended disapproval to submit the additional information. (ii) The Administrator may establish general procedures and criteria in a relevant standard to accomplish the requirements of paragra ph (c)(5)(i) of this section. (iii) If the Administrator approves the use of an alternative monitoring method for an affected source under paragraph (c)(5)(i) of this section, the owner or operator of such source shall continue to use the alternative monit oring method until he or she receives approval from the Administrator to use another monitoring method as allowed by this subpart or a subpart referenced by this subpart.Page 190 of 197

(6) Alternative to the relative accuracy test
. An alternative to the relative accurac y test for CEMS specified in a relevant standard may be requested as follows: (i) Criteria for approval of alternative procedures
. An alternative to the test method for determining relative accuracy is available for affected sources with emission rates dem onstrated to be less than 50 percent of the relevant standard. The owner or operator of an affected source may petition the Administrator under paragraph (c)(6)(ii) of this section to substitute the relative accuracy test in section 7 of Performance Specif ication 2 with the procedures in section 10 if the results of a performance test conducted according to the requirements specified in this subpart or subpart referenced by this subpart demonstrate that the emission rate of the pollutant of interest in the units of the relevant standard is less than 50 percent of the relevant standard. For affected sources subject to emission limitations expressed as control efficiency levels, the owner or operator may petition the Administrator to substitute the relative ac curacy test with the procedures in section 10 of Performance Specification 2 if the control device exhaust emission rate is less than 50 percent of the level needed to meet the control efficiency requirement. The alternative procedures do not apply if the CEMS is used continuously to determine compliance with the relevant standard.Page 191 of 197

(ii) Petition to use alternative to relative accuracy test
. The petition to use an alternative to the relative accuracy test shall include a detailed description of the procedure s to be applied, the location and the procedure for conducting the alternative, the concentration or response levels of the alternative relative accuracy materials, and the other equipment checks included in the alternative procedure(s). The Administrator will review the petition for completeness and applicability. The Administrator's determination to approve an alternative will depend on the intended use of the CEMS data and may require specifications more stringent than in Performance Specification 2. (ii i) Rescission of approval to use alternative to relative accuracy test . The Administrator will review the permission to use an alternative to the CEMS relative accuracy test and may rescind such permission if the CEMS data from a successful completion of t he alternative relative accuracy procedure indicate that the affected source's emissions are approaching the level of the relevant standard. The criterion for reviewing the permission is that the collection of CEMS data shows that emissions have exceeded 7 0 percent of the relevant standard for any averaging period, as specified in the relevant standard. For affected sources subject to emission limitations expressed as control efficiency levels, the criterion for reviewing thePage 192 of 197

permission is that the collecti on of CEMS data shows that exhaust emissions have exceeded 70 percent of the level needed to meet the control efficiency requirement for any averaging period, as specified in the relevant standard. The owner or operator of the affected source shall maintai n records and determine the level of emissions relative to the criterion for permission to use an alternative for relative accuracy testing. If this criterion is exceeded, the owner or operator shall notify the Administrator within 10 days of such occurren ce and include a description of the nature and cause of the increased emissions. The Administrator will review the notification and may rescind permission to use an alternative and require the owner or operator to conduct a relative accuracy test of the
CE MS as specified in section 7 of Performance Specification 2. (d) Waiver of recordkeeping or reporting requirements
. (1) Until a waiver of a recordkeeping or reporting requirement has been granted by the Administrator under this paragraph, the
owner or oper ator of an affected source remains subject to the recordkeeping and reporting requirements of this subpart and any subparts referenced by this subpart. (2) Recordkeeping or reporting requirements may be waived upon written application to the Administrator if, in the Administrator's judgment, the affected source is achieving the relevant standard(s), or the source is operating under anPage 193 of 197

extension of compliance, or the owner or operator has requested an extension of compliance and the Administrator is still

co nsidering that request. (3) If an application for a waiver of recordkeeping or reporting is made, the application shall accompany the request for an extension of compliance under paragraph (a) of this section, any required compliance progress report or com pliance status report required under this part or in the source's title V permit, or an excess emissions and continuous monitoring system performance report required under §63.999(c) or another subpart referenced by this subpart, whichever is applicable. T he application shall include whatever information the owner or operator considers useful to convince the Administrator that a waiver of recordkeeping or reporting is warranted. (4) The Administrator will approve or deny a request for a waiver of recordkeep ing or reporting requirements under this paragraph when he/she

— (i) Approves or denies an extension of compliance under paragraph (a) of this section; or (ii) Makes a determination of compliance following the submission of a required Notification of Compli ance Status report or excess emissions and continuous monitoring systems performance report; orPage 194 of 197

(iii) Makes a determination of suitable progress towards compliance following the submission of a compliance progress report, whichever is applicable. (5) A wai ver of any recordkeeping or reporting requirement granted under this paragraph may be conditioned on other recordkeeping or reporting requirements deemed necessary by the Administrator. (6) Approval of any waiver granted under this section shall not abroga te the Administrator's authority under the Act or in any way prohibit the Administrator from later canceling the waiver. The cancellation will be made only after notice is given to the owner or operator of the affected source. §63.1113 Procedures for appro val of alternative means of emission limitation. (a) Alternative means of emission limitation
. An owner or operator of an affected source may request a determination of alternative means of emission limitation to the requirements of design, equipment, work practice, or operational standards of this subpart or of a subpart referenced by this subpart. If, in the judgment of the Administrator, an alternative means of emission limitation will achieve a reduction in HAP emissions at least equivalent to the reduc tion in emissions from that source achieved under any design, equipment, work practice, or operational standards (but not performance standards) in thisPage 195 of 197

subpart, the Administrator will publish in the Federal Register a notice permitting the use of the alte rnative means for purposes of compliance with that requirement. (1) The notice may condition the permission on requirements related to the operation and maintenance of the alternative

means. (2) Any such notice shall be published only after public notice a nd an opportunity for a hearing. (b) Content of submittal
. (1) In order to obtain approval, any person seeking permission to use an alternative means of compliance under this section shall collect, verify, and submit to the Administrator information showin g that the alternative means achieves equivalent emission reductions. An owner or operator of an affected source seeking permission to use an alternative means of compliance who has not previously performed testing shall also submit a proposed test plan. I f the owner or operator seeks permission to use an alternative means of compliance based on previously performed testing, they shall submit the results of testing, a description of the procedures followed in testing or monitoring, and a description of pert inent conditions during testing or monitoring. (2) The owner or operator who requests an alternative means of emissions limitation shall submit a description of the proposed testing, monitoring, recordkeeping, and reporting thatPage 196 of 197

will be used and the propos ed basis for demonstrating compliance. (3) For storage vessels, the owner or operator shall include the results of actual emissions tests using full

- size or scale

- model storage vessels that accurately collect and measure all regulated HAP emissions using a given control technique, and that accurately simulate wind and account for other emission variables such as temperature and barometric pressure, or an engineering analysis that the Administrator determines to be an accurate method of determining equivalen ce. (4) For proposed alternatives to equipment leak requirements referenced by this subpart, the owner or operator shall also submit the information specified in and meet the requirements for alternate means of emission limitation specified in the referenc ed subparts. §63.1114 Implementation and enforcement. (a) This subpart can be implemented and enforced by the U.S. Environmental Protection Agency (EPA), or a delegated authority such as the applicable State, local, or tribal agency. If the EPA Administrat or has delegated authority to a State, local, or tribal agency, then that agency has the authority to implement and enforce this subpart. Contact the applicable EPA Regional Office to find out if this subpart is delegated to a State, local, or tribal agenc y.Page 197 of 197

(b) In delegating implementation and enforcement authority of this subpart to a State, local, or tribal agency under 40 CFR part 63, subpart E, the authorities contained in paragraphs (b)(1) through (5) of this section are retained by the EPA Administra tor and are not transferred to the State, local, or tribal agency. (1) Approval of alternatives to the nonopacity emissions standards in §63.1103(a)(3), (b)(3) through (5), (c)(3), (d)(3), (e)(3), (f)(3), (g)(3) and (4), and (h)(3) under §63.6(g). Follow t he requirements in §63.1113 to request permission to use an alternative means of emission limitation. Where these standards reference another subpart, the cited provisions will be delegated according to the delegation provisions of the referenced subpart. (2) [Reserved] (3) Approval of major changes to test methods under §63.7(e)(2)(ii) and (f) and as defined in §63.90. (4) Approval of major changes to monitoring under §63.8(f) and as defined in §63.90. (5) Approval of major changes to recordkeeping and
rep orting under §63.10(f) and as defined in §63.90.