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. §63.1104 Process vents from continuous unit operations: applicability assessment procedures and methods. §63.1105 Transfer ra cks. §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 requirements. §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 Imp lementation 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 Own or Operate an Acrylic and Modacrylic Fiber Production Existing or New Affected Source and Am Complying With Paragraph (b)(3)(i) of T his Section? Table 3 to §63.1103(b)(3)(ii)

— What Are My Requirements If I Own Or Operate An Acrylic And Modacrylic Fiber Production 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 M y 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 R equirements 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 Requirements 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)

— Coefficients for Total Resource Effectiveness §63.1100 Applicability. (a) General
. This subpart applies to source categories and aff ected 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 affect ed 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 Provisions), §§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 faci lities
. The provisions of this subpart do not apply to research and development facilities, consistent with section 112(b)(7) of the Act. (d) Primary product determination and applicability
. The primary product of a process unit shall be determined accordi ng 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 produc t, then that product shall represent the primary product of the process unit. (2) If a process unit 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 represent the primary product of the flexible operation unit. (ii) If the flexible operation unit will manufacture multiple products equally based on operating tim e, 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 comply 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 operation 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 produ ct 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 som ething other than a product produced by a source category subject to requirements under this subpart, 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 produc ed by a source category subject to requirements under this subpart. (i) If the process unit manufactures 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 flexi ble 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 m ake 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 produc t subject to this subpart that is not the primary product, the owner or operator shall comply with 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 p roducts in accordance with the requirements for the production of the primary product. As appropriate, 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 whe n 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 primary product in §63.1103. If control is required, the owner or operator shall establish separate parameter monitoring levels, as appropriate, for the product ion of each product. The parameter monitoring levels developed shall be submitted in the Notification 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 paragraphs (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 vessel 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 vessel 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 v essel (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 affected source under this subpa rt 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 operations for that storage vesse l, 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 §63.1110(a)(4). If the predominant u se 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 material 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 storage vessel that could reaso nably 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 that place material into, or r eceive 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 section. (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 vessel 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 s torage 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 that process unit. (iii) If th ere 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 paragrap h (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 determine 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 operation equipment is already subje ct 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 equipment is used exclusively by

a s ingle 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 the greatest input into or out put 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 t hose 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 equipment that is shared among proce ss 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 1 97

(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 for an affected source under t his 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 required by §63.1110(a)(4). If t he 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 change 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 se ction 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 with 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 sp ecified 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 vent s . (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 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 14 of 197

(ii) After the compliance dates specified in §63.1102, a process vent that must be controlled according to the

r equirements 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 sp ecified 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 requirements of this subpart Y Y. (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 CFR part 61, subpart J or subpa rt 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 part 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 s ubpart 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 either set of requirements. I n 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 wastewater 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 through 63.147 will also be d eemed 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 that is subject to control req uirements 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
comp liance 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 control 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) shall constitute compliance wit h 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 owner 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 with §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 requirements of 40 CFR part 61, subpart FF. §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 sou rces. 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 provision s, 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. 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 fromPage 18 of 197

the charging of a vessel with organic HAP will result in a discrete emi ssion 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. There are po ssibly 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, involves 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 simultaneously 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. Capacit y 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.Page 19 of 197

Closed vent system means a system that is not open to the atmosphere 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 any tank t ruck 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. Combined 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 data acquisition and availability requirements of this subpart, and that is used to sample, condition (if applicable), analyze, and provide a record of process or control system parameters.Page 20 of 197

Continuous unit operation means a unit operation where the inputs and outputs flow continuously. Con tinuous 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 combustion de vice, 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 crite ria 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 overhead rece ivers, 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 from 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 approachPage 21 of 197

equilibrium 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 spinnin g 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 metho d 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 emissions means emissions in excess of those that would have occurred if there were no start

- up, shutdown, or malfunction and the owner or operator complied with the relevant provisions of this subpart.Page 22 of 197

Final recovery device means the last recovery device on a
proc ess 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 directly to t he 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 gas sys tem 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 combustion devi ces 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). Group 2 wastewater stream means a process wastewater stream that does not meet the definition of a Group 1 wastewater
stream.Page 23 of 197

Halogens and hydrogen halides means hydrogen chloride (HCl), chlorine (Cl2), hydrogen bromide (HBr), bromine (Br2), and hydrogen f luoride (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. Initial 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 d oes 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 doe s 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. Low throughput transfer rack means a transfer rack that 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,Page 24 of 197

whose primary product is a product prod uced 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 d raining 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 equipme nt, 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 oper ation are not malfunctions. 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 tran sfer temperature for liquids stored or transferred above or below the ambient temperature or at the local maximum monthly averagePage 25 of 197

temperature as reported by the National Weather Service for liquids stored or transferred at the ambient temperature, as deter mined: (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 stand ard 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 separ ator 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 basins, s kimmers, weirs, grit chambers, sludge hoppers, and bar screens that are located directly after 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, andPage 26 of 197

corrugated

- plate interceptor with the associated ancillary equipment.
On

- site means, with respect to records r equired 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. Organic 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 Administr ator 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 adjoining p roperty that is under common control, including properties that are separated 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 combinat ion thereof.Page 27 of 197

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 regulation al lows 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 defined un der 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 conce ntration 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. Pressure relief device or valve means a safety device used to prevent operating pressures from exceeding the maximum allowable working pressure of the process equipme nt. A common pressure relief device is a spring

- loaded pressure relief valve. Devices that are actuated either by a pressure of less than orPage 28 of 197

equal to 2.5 pounds per square inch gauge or by a vacuum are not pressure 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 boiling or bubble point of substance(s). Exampl es 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 means 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 pro cess 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 safety constraints and during which repairs can be effected. Th e 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.Page 29 of 197

(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 start up the unit and result in greater emissi ons 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 vent means the point of discharge to the atmo sphere (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) Relief valve discharges; (2) Leaks from equi pment subject to this subpart; (3) Gas streams exiting a control device complying with this subpart; (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);Page 30 of 197

(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 subjec t 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 equ al 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, b y - 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 ba tch process, 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.Page 31 of 197

Process wastewater stream means a stream that contains process wastewater.
P roduct 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 primarily for disposal. Recapture devices i nclude, 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 devices. Recovery device means an individual u nit 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 recovery devices include absorbers, carbon ad sorbers, condensers, oil

- water separators or organic

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

- film evaporation units. For purposes of thePage 32 of 197

monitoring, recordkeeping, and reporting requirements of this subpart, recap ture 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 products, where the operations are under the clo se 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 not 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 inc ludes 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. Storage vessel or tank , for the purposes of regulation under the storage vessel provisions of this subpart, means aPage 33 of 197

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 purposes of regulation under the storage vessel provisions of this subpart, storage vessel does not include vessels permanently attached to mot or vehicles such as trucks, railcars, barges, or ships; pressure vessels designed to operate in excess of 204.9 kilopascals 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 intermed iate vessel. Surge control vessels are used within a process unit (as defined in this subpart) when in

- process storage, 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 34 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 associated with a process vent stream, based on vent stream flow rate, emission rate of organic HAP, net heating value, and corrosion propertie s (whether or not the vent stream contains halogenated compounds), as quantified by the equations given under §63.1104(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 transfer 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 other 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 35 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 from which the liquid being loaded originated, or to compress collected organic HAP vapors and commingle with the raw feed of a production proc ess unit.
Wastewater is either a process wastewater or a maintenance wastewater and means water that: (1) Contains either: (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 annual 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 produced by a source category subject to this subpart.
Wastewater stream means a stream that contains wastewater. §63.1102 Compliance schedul e.Page 36 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 polycarbon ate 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 thi s 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 s ection. (1) Compliance dates for new and reconstructed sources
. (i) The owner or operator of a new or reconstructed 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 effective 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 af ter the applicable effective date in Table 1 to §63.1102 of this section shall comply with this subpart upon startup of the source.Page 37 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 within 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 relevant standards for existing sources under this subpart. Such sources shall comply with the relevant standards within 3 years of becoming a major sour ce. (b) [Reserved]. All acrylic and modacrylic fiber production affected sources and polycarbonate production affected sources that commenced construction or reconstruction on or beforePage 38 of 197

January 9, 2014 , shall be in compliance with the pressure relief device monitoring requirements of § 63.1107(e)(3) upon initial startup or [ INSERT DATE 3 YEARS AFTER DATE OF PUBLICATION IN THE FEDERAL REGISTER] , whichever is later, and the equipment leaks requirements of 40 CFR part 63, subpart UU upon initial startup

or [ INS ERT DATE 1 YEAR AFTER DATE OF PUBLICATION IN THE FEDERAL REGISTER] , whichever is later. New acrylic and modacrylic fiber production affected sources and polycarbonate production affected sources that commence construction or reconstruction after January 9, 2014 , shall be in compliance with the pressure relief device monitoring requirements of § 63.1107(e)(3) upon initial startup or by [ INSERT DATE OF PUBLICATION IN THE FEDERAL REGISTER] , whichever is later
. 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, 2000 July 12,

2002.Page 39 of 197

(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 so urce . For the acetal resins 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 associa ted with an acetal resins 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 b ottoms 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). (C) All wastewater streams associated with the acetal resins production process unit as defined in (a)(2) of this section.Page 40 of 197

(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 (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 also 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 (C H 2 O) in the polymer backbone. 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 vent from a continuous unit operation involved in the purification of formaldehyde feedstock for use in the acetal homopolymer 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 existingPage 41 of 197

and new sources. Applicability assessment procedures and methods are specified in §§63.1104 through 63.1107. An owner or operator of an affe cted source is not required 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, recordkeep ing, 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 operator must control organic HAP emissions from each affected source e mission point by meeting 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 kilopascals (for new sources) a. Reduce emissions of total organic HAP by 95 wei ght

percent by venting emissions through a closed vent system to any combination 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 sy stem or a process), as specified in §63.982(a)(1) (storagePage 42 of 197 vessel 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 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 2 0 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 §63.982(a)(2) (process vent requirements) of this pa rt. 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 closed vent system to any combination of control devices meeting the requirements of subpart SS, as specif ied in §63.982(a)(2) (process vent requirements) of this part; orPage 43 of 197 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 Monitor and keep records of equipment operating pa rameters 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 e quipment 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 with 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 equipment listed in §63.1106(c)(1) The 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.Page 44 of 197

a The TRE is determined according to the procedures specified in §63.1104(j).

b The weight

- percent organic HA P 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 pro duction (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 are associated with a suspension or soluti on 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 organic HAP. (B) All process vents from conti nuous unit operations. (C) All wastewater streams associated with the acrylic and modacrylic fibers production process unit as defined in (b)(2) of this section. (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 orPage 45 of 197

organic HAP. For the purposes of implementing this paragraph, a spinning line includes the spinning solution filter s, 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 th e 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). The polyacrylonitrile is soluble in the solvent. In contrast to suspension polymerization, the resulting reactor polymer solution (spin dope) is filtered and pumped directly to the fiber spinning process.Page 46 of 197

A crylonitrile 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 su spension 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 process. Fiber spinning line means the group of equi pment 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. In organic hazardous air pollutant or in organic HAP service means , for acrylic and modacrylic fiber production affected source s, that a piece of equipment either contains or contracts a fluid (liquid or gas) that is at least 10 percent by weight of total organic HAP as determined according to the provisions of § 63.180(d) of subpart H. The provisions of § 63.180(d) of subpart H als o specify how to determine that a piece of equipment is not in organic HAP service.Page 47 of 197

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. Seal means, for acrylic and modacrylic fiber production affected source s complying with the requirements of § 63.1033(b) of subpart UU or § 63.167 (a) of subpart H on or after [INSERT DATE OF PUBLICATION IN THE FEDERAL REGISTER] , that 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, or § 63.180(b) and, as applicable, § 63.180(c) of subpart H, indicates no readings of 500 parts per million or greater. Spin dope means the liquid mixture of polymer and solvent that is fed to the spinneret to form the acrylic and modacrylic fibers. (3) Requi rements . 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 appl icability for both existing and new sources. Applicability assessment procedures and methods are specified in §§63.1104Page 48 of 197

through 63.1107. An owner or operator of an affected source is not required to perform tests, or other applicability assessment procedur es 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 al ternative 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 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 contains organic HAP a. Reduce emissions of acrylonitrile organic HAP 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 §63.982(a)(1) (storage vessel requirements ) of this part ,Page 49 of 197 or 95 weight

- percent or greater b y 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 de vice requirements); 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 from continuous unit operations (halogenated) The vent steam has a

mass emission rate of halogen atoms contained in organic compounds ≥0.45 kilograms per hour a and an acrylonitrile organic HAP concentration ≥50 parts per million by volume b and an average flow rate ≥0.005 cubic meters per minute a. Reduce emissions of acrylonitrile organic HAP 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 halogen reduction device meeting the requirements of subpart SS, §63.994 (halogen red uction 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 devicePage 50 of 197 meeting the requirements of subpart SS, §63.994 (halogen reduction devices 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 rate of halogen atoms contained in organic compounds <0.45 kilograms per hour a , and an ac rylonitrile organic HAP concentration ≥50 parts per million by volume b and an average flow rate ≥0.005 cubic meters per minute a. Reduce emissions of acrylonitrile organic HAP by using a flare meeting the requirements of subpart SS, §63.987 (flare requirements) of this part ; or b. Reduce emissions of acrylonitrile 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 closed vent system to any c ombination 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 specified in §63.982(a)(2) (process vent requir ements) 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 organic HAP emissions by 85 weight

percent or more. (For example, by enclosing you may enclose the spinning and washing areas of thePage 51 of 197 spinning line (as specified in paragraph (b)(4) of this section) and vent ing through a closed vent system and us ing e any combination of control devices meeting the requirements of subpart SS, as specified in §63.982(a), of this part
. ); or b. Reduce acrylonitrile organic HAP emissions from the spinning line to less than or equal to 0.25 kilograms of acrylonitrile organic HAP per megagram (0.5 pounds of acrylonitrile organic HAP per ton) of acrylic and modacrylic fiber produced; or c. Reduce the AN organic HAP 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 dope produced from a solution polymerization process Maintain records and report emissions as specified in §§63.1109 through 63.1110. Control of spinning line AN emissions is not required 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. 6. A fiber spinning line that is an existing source The spinning line

uses a spin dope produced from a suspensi on polymerization process a. Reduce the AN organic HAP concentration of the spin dope to less than 100 ppmw b , ; or b. Reduce acrylonitrile organic HAP emissions from the spinning line to lessPage 52 of 197 than or equal to 0.025 kilograms of acrylonitrile organic HAP 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 organic HAP c , and operates ≥300 hours per year a. C omply with either § 63.1008 of subpart TT or § 63.1027 of subpart UU for connectors in gas and vapor service and in light liquid service, and 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
. , except § 63.1030 , for all other applicable equipment ; or b. Comply with the requirements in subpart H of this part, except § 63.165, as provided by the regulatory overlap provisions in § 63.1100(g)(4)(ii)
. 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).

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).Page 53 of 197

10. An item of equipment listed in §63.1106(c)(1) The 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.

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 f rom the acrylic and modacrylic fibers production facility by meeting the applicable requirements specified in table 3 of this section. The owner or operator must determine the facility acrylonitrile o rganic HAP emission rate using the procedures specified i n 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 does not have to perform tests, TRE calculations or other applicability assessment pr ocedures 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 throughPage 54 of 197

63.1112. Procedures for approval of alternative means of emission limitations are specified in §63.1113. Table 3 to §63.1103(b)(3)(ii) — 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 emissions 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 organic HAP emissions from all affected storage vessels, process 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 organic HAP per megagram (Mg) of fiber produced. b. Determine the facility acrylonitrile organ ic HAP emission rate in accordance with the requirements specified in paragraph (b)(5) of this section. 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 organic HAP emissions from all affected storage vessels, process vents, wastewater streams associated with the acrylic and modacrylic fibers production process unit as defined in paragraph (b)(2)Page 55 of 197 of this section, and fiber spin ning lines operated in your acrylic and modacrylic fibers production facility to less than or equal to 0.25 kilograms (kg) of acrylonitrile organic HAP per megagram (Mg) of fiber produced. b. Determine the facility acrylonitrile organic HAP 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 acrylonitrile organic HAP , a and operates > 300 hours per year (with the differences for pressure relief devices described in item 4 below) Meeting either of the following standards for equipment leaks: a. C omply with either § 63.1008 of subpart TT or § 63.1027 of this part; or b. Comply with subpart UU for connectors in gas and vapor service and in light liquid service, and comply with subpart UU of this part
. , except § 63.1030 , for all other applicable equipment; or b. Comply with the requirements in subpart H of this part, except § 63.165, as provided by the regulatory overlap provisions in § 63.1100(g)(4)(ii). 4. A pressure relief device in organic HAP service Complying with § 63.1107(e).

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 thePage 56 of 197

requirements speci fied 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 enclosure 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 enclosure. (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 or Temporary Total Enclosure” initially when the enclosure is first installed and, thereafter, annually. (5) Facility acrylonitrile organic HAP emission rate determination
. For an own er or operator electing to comply with paragraph (b)(3)(ii) of this section, the facility acrylonitrile organic HAP emission rate must be determined usingPage 57 of 197

the requirements specified in paragraphs (b)(5)(i) through (iii) of this section. (i) The owner or operator must prepare an initial determination of the facility acrylonitrile organic HAP emission
rate. (ii) Whenever changes to the acrylic or modacrylic fiber production operations at the facility could potentially cause the facility acry lonitrile organic HAP emission rate to exceed the applicable limit of kilogram of acrylonitrile organic HAP per Megagram of fiber produced, the owner or operator must prepare a new determination of the facility acrylonitrile organic HAP emission rate. (iii) F or 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 organic HAP emission rate calculation. (c) Hydro gen 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 all emiss ion points, in combination, listed in paragraphs (c)(1)(i)(A) through (D) of this section, that are associated with a hydrogen fluoride production processPage 58 of 197

unit located at a major source as defined in section 112(a) of the Act. (A) All storage vessels 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 scrubbers. (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. Equipment means each pump, compressor, agitator, pressure relief device, sampling connection system, open

- ended valv e or line, valve, connector, and instrumentation system in hydrogenPage 59 of 197

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 predominant type of equipment used in instrumentation systems; however, oth er types of equipment may also be included in these systems.Page 60 of 197

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. 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 commonPage 61 of 197

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. Sensory monitoring means the detection of a potential leak to the atmosphere by walk

- through visual, audible, or olfactory monitoring. Comprehensive component

- by

- component insp ection is not required. Shift means the time a shift operator normally works, typically 8 or 12 hours.Page 62 of 197

(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 emissions from each affected source emission p oint 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 recordkeeping 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 . . . T hen you must . . . 1. A storage vessel The stored

material is hydrogen fluoride Reduce emissions of hydrogen fluoride by venting displacement 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 thePage 63 of 19 7 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 main tained 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 appli cable. 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 scrubbe r 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 transfer 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. Monitoring, recordkeeping, and reporting of wet sc rubber operation shall be in accordance with the requirements stated above for a wet scrubber controlling HF emissions from a storage vessel. You also must load hydrogen fluoride into onlyPage 64 of 197 tank trucks and railcars that have a current certification in accor dance 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 - tight (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 i mplementing a sensory monitoring leak detection program. Equipment that is excluded from sensory monitoring because it operates less than 300 hours per year or is in vacuum service shall be identified by list, location, or other method and the identity sha ll 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 detected, 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 of successful repair. (d) Polycarbonate production applicability, definitions, and require ments

— (1) Applicability

— (i) Affected source
. For the polycarbonate production (as defined in paragraph (d)(2) of thisPage 65 of 197

section) source category, the affected source shall comprise all emission points, in combination, listed in paragraphs (d)(1)(i)(A) throu gh (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 purposes 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 considered 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 provides 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. (B) All process vents from continuous and batch unit operations. (C) All wastewater streams. (D) Equi pment (as defined in §63.1101 of this subpart) that contains or contacts organic HAP.Page 66 of 197

(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, alth ough 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 pyridine or other catalyst to form polycarbonate. Methylene chloride or other solvents are used in t his polymerization reaction. In organic hazardous air pollutant or in organic HAP service means , for polycarbonate production affected source s, that a piece of equipment either contains or contracts a fluid (liquid or gas) that is at least 5 percent by weight of total organic HAP as determined according to the provisions of § 63.180(d) of subpart H. The provisions of § 63.180(d) of subpart H also specify how to determine that a piece of equipment is not in organic HAP service. Seal means, for polycarbonate production affected source s complying with the requirements of § 63.1033(b) of subpart UU orPage 67 of 197

§ 63.167 (a) of subpart H on or after [INSERT DATE OF PUBLICATION IN THE FEDERAL REGISTER] , that 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, or § 63.180(b) and, as applicable, § 63.180(c) of subpart H, indicates no readings of 5 00 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 applicable 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 sourc e is not required 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

r eporting requirements are specified in §§63.1108 through 63.1112. Procedures 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?Page 68 of 197

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 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 §63.982(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 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 vessel with: 75 cubic meters ≤ capacity < 151 cubic meters The maximum true vapor pressure of tota l 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,Page 69 of 197 as specified in §63.982(a)(1) (stora ge vessel requirements) of this part. 4. A process vent from continuous unit operations or a combined vent stream a (halogenated) 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 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 §63.982( a c )(2) (process vent requirements) of this part and (e) ; and then vent emissions from those control device(s) 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 b y 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 red uction device meeting the requirements of subpart SS, §63.994 (halogen reduction device requirements) of this part ; and then vent emissionsPage 70 of 197 from those control device(s) through a closed vent system to any combination of control devices meeting the requirements of subpart SS, as specified in §63.982(c)(2) and (e), that reduce s emissions of total organic HAP by 98 weight

perc ent ; , 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 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 TRE index value greater than 2.7. 5. A process vent from continuous unit operations or a combined vent stream a (nonhalogenated) 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 concentration of 20 parts per million by volume; whichever is less stringent, by venting emissions through a closed vent system to any combination of contr ol devices meeting the requirements of subpart SS, as specified in §63.982(a)(2) (process vent requirements) of this part; orPage 71 of 197 b. Achieve and maintain a TRE index value greater than 2.7. 5 6 . A process vent from continuous unit operations 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) 63.982(e) and 63.993(c) (absorber s , condenser s , and carbon adsorber s monitoring and other recovery devices used as final recovery devices ) or 63.995(c) (other noncombustion systems used as a control device monitoring) of this part. 6 7 . Equipment as defined under §63.1101 (with the differences for pressure relief devices described in item 11 below) The equipment contains or contacts ≥ 5 weight

- percent total organic HAP e , and operates ≥ 300 hours per year a. Comply with the requirements either § 63.1008 of subpart TT (national emission standards for equipment leaks (control level 1)) or § 63.1027 of subpart UU (nat ional emission standards for equipment leaks (control level 2)) for connectors in gas and vapor service and in light liquid service, and comply with the requirements of subpart UU of this part , except § 63.1030 , for all other applicable equipment; or . b. C omply with the requirements in subpart H of this part, except § 63.165, as provided by the regulatory overlap provisions in § 63.1100(g)(4)(ii)
. 7 8 . A polycarbonate production process The process wastewater stream is a Group 1 or a Comply with the requirements of §63.1106(a).Page 72 of 197

unit that generates process wastewater Group 2 wastewater stream 8 9 . A polycarbonate production process unit that generates maintenance wastewater The maintenance wastewater contains organic HAP Comply with the requirements of §63.11 06(b).

9 10 . An item of equipment listed in §63.1106(c)(1) The 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.

11. 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 vent i s 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 route d 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.

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.Page 73 of 197

Table 6 to §63.1103(d) — What are My Requirements 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 org anic 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 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 b. Comply with the requirements of subpart WW (national emission standards for sto rage 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 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) (storage vessel requirements) of this part. 3. A storage vessel with: 38 cubic The maximum true vapor pressure of Reduce emissions of total

organic HAP by 95 weight

percent by ventingPage 74 of 197

meters ≤capacity <151 cubic meters total organic HAP is ≥76.6 kilopascals 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) (storage vessel requirements) of this part. 4. A process vent from continuous unit operations or a combined vent stream a (halogenated) The vent stream has a TRE b,c ≤9.6 a. Reduce emissions of

total organic HAP by 98 weight

- percent ; , or 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 §63.982( a c )(2) (process and (e) ; and then v ent requirements) of this part; and Vent emissions from those control device(s) 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 , 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 vent ing emissions through a closed vent system to a halogen reduction devicePage 75 of 197 meeting the requirements of subpart SS, §63.994 (halogen reduction device requirements) of this part; and Reduce emissions of total organic HAP by 98 weight

- percent; or reduce total o rganic HAP or TOC to a concentration of 20 parts per million by volume; whichever is less stringent, by venting emissions ; and then vent emissions from those control device(s) through a closed vent system to any combination of control devices meeting the r equirements of subpart SS, as specified in §63.982( a c )(2) (process vent requirements) and (e), that r educe s emissions of this part; total organic HAP by 98 weight

- percent , or reduce total organic HAP or TOC to a concentration of 20 parts per million by volu me , whichever is less stringent; or c. Achieve and maintain a TRE index value greater than 9.6. 5. A process vent from continuous unit operations or a combined vent stream a (nonhalogenated) The vent stream has a TRE b,c ≤ 9.6 a. Reduce emissions of

total organic HAP by 98 weight

- percent; or 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 de vices meeting the requirements of subpart SS,Page 76 of 197 as specified in §63.982(a)(2) (process vent requirements) of this part; or b. Achieve and maintain a TRE index value greater than 9.6. 5 6 . 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 H P A P e , and operates ≥ 300 hours per year a. C omply with the

requirements either § 63.1008 of subpart TT (national emission standards for equipment leaks (control level 1)) or § 63.1027 of subpart UU (national emission standards for equipment leaks (control level 2)) for connectors in gas and vapor service and in light liquid service, and comply with the requ irements of subpart UU of this part
. , except § 63.1030 , for all other applicable equipment; or b. Comply with the requirements in subpart H of this part, except § 63.165, as provided by the regulatory overlap provisions in § 63.1100(g)(4)(ii). 7 . 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) of this subpart) shall be used to calculate the TRE index value.Page 77 of 197

c The TRE is determined according to the procedures specified in §63.1104(j). If a dryer is manifolded with such vent s, 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 ve nts 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.

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

- containing material.Page 78 of 197

(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 section) associated with an ethylene production unit. (F) All heat exchange systems (as defined in paragraph (e)(2) of this section) associated wi th an ethylene production unit. (G) All ethylene cracking furnaces and associated decoking operations. (ii) Exceptions
. The emission points listed in paragraphs (e)(1)(ii) (A) through (L) of this section are in the ethylene production source category but a re not subject to the requirements of paragraph (e)(3) of this section. (A) Equipment that is located within an ethylene 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. (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.Page 79 of 197

(H) Transfer racks, l oading 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, incl uding emissions during decoking operations. (K) Pressure vessels designed to operate in excess of 204.9 kilopascals 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 subparts F, G, H, I and CC of this part. (iv) Compliance schedule
. The compliance schedule for the ethylene production source category is specifie d 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. Ethylene process vents are gas streams that are discharged to the 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 valvePage 80 of 197

discharges; gaseous streams routed to a fuel gas system; leaks from 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 manufacturing process unit in which ethylene and/or propylene are produced by separation from petroleum refining process streams or by subjecting hydr ocarbons to high temperatures in the presence of steam. The ethylene production unit includes the separation of ethylene 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. Organic HAP means the compounds 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 includesPage 81 of 197

the associated pumps, meters, shutoff valves, relief valves, and other piping and valves. Transfer rack does not include racks, arms, or hoses that contain organ ic 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 cha racteristics of the waste stream (e.g., flow rate, HAP concentration, water content) are determined at the point of waste generation. Examples of a waste stream include process wastewater, product tank drawdown, sludge and slop oil removed from waste manag ement units, and landfill leachate. (3) Requirements
. The owner or operator must control organic HAP emissions from each affected source emission point by meeting the applicable requirements specified in Table 7 to this section. An owner or operator must p erform the applicability assessment procedures and methods for process vents specified in §63.1104, except for paragraphs (d), (g), (h), (i), (j), (l)(1), and (n). An owner or operator mustPage 82 of 197

perform the applicability assessment procedures and methods for
eq uipment leaks specified in §63.1107. General compliance, recordkeeping, and reporting requirements are specified in §§63.1108 through 63.1112. Minimization of emissions from startup, shutdown, and malfunctions must be addressed in the startup, shutdown, an d 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 capa cities ≥95 cubic meters.
(b) 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 ≥95 cubi c meters (i) Comply with the requirements of subpart WW of this part; or (ii) 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 §6 3.982(a)(1). (c) A storage vessel (as (1) The maximum true

vapor pressure of total (i) Reduce emissions of total organic HAP by 98Page 83 of 197

defined in §63.1101) that stores liquid containing organic HAP organic HAP is ≥76.6

kilopascals 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 rat e ≥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 paragraph (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 organic HAP by 98 weight

percent; or reduce organic HAP or TOC to a conc entration 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; or (ii) Install process piping designed to collect the HAP

conta ining 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.Page 84 of 197

(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 generate 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 manuf acturing 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 for the carbon black production source category includes all waste management units, maintenance wastewater, and equipment
componen ts that contain or contact HAP that are associated with the carbon black production process unit. (ii) Compliance schedule
. The compliance schedule for the carbon black production and acetylene decomposition carbon blackPage 85 of 197

production affected sources, as def ined 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 un it means the equipment assembled and connected by hard

- piping or duct work to process raw materials to manufacture, store, 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 transfer racks, and connected ducts and piping. A carbon black production process unit includes pumps, compressors, agitators, pressure reli ef devices, sampling connection systems, open

- ended valves or lines, valves, connectors, instrumentation systems, and control devices or systems. Dryer means a rotary

- kiln dryer that is heated externally and is used to dry wet pellets in the wet pelletizat ion 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.Page 86 of 197

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 applicability for existing and new sources. Applicability assessment procedures and methods are specified in §63.1104. An owner or operator of an a ffected 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, recordkeepi ng, 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. (ii) Pressure relief devices used to protect against overpressure in the case of cata strophic failure of your process filter system are exempt from the closed vent system inspection requirements of §63.983(b) and (c). Exempt pressure relief 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 (1) The HAP

concentration of the (i) Reduce emissions of HAP by using a flare meeting thePage 87 of 197

production main unit filter process vent emission stream is

equal to or greater than 260 parts per million by volume a requirements of subpart SS of this part; or (ii) Reduce emissions of total HAP by 98 weight

percent o r 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).

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 affecte d 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 define d in §63.1101) that contain or contact cyanide chemicals that are associated with the cyanide chemicals 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 andPage 88 of 197

ammonia in the presence of oxygen over a platinum/rhodium catalyst. An Andrussow process unit begins at t he point at which the 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 fuel in a boiler or industrial furnace, or is shipped offsite. If raw hydrogen
cy anide 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 u nit means a process unit that produces hydrogen cyanide by reacting methane and ammonia over a platinum catalyst. 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 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 BMA process unit. Byproduct means a chemical that is produced coincidentally during the production of another chemical.Page 89 of 197

Cyanide chemicals manufacturing process unit or CCMPU mean s 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 A ndrussow 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 connected ducts and piping. A cyanide chemicals manufacturing process unit includes pumps, compressors, agitators, pressure relief devices, sampling conn ection 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 as the intended pro duct of a CCMPU or a byproduct of the Sohio process. Other hydrogen cyanide, potassium cyanide, or sodium cyanide byproducts, impurities, wastes, and trace contaminants are not considered to be cyanide chemicals products. Dry

- end process vent means a proce ss vent originating from the drum filter or any other unit operation in the dry end of aPage 90 of 197

sodium cyanide manufacturing 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 raw material in a downstream process, or is shipped offsite. Organic HAP means, for purposes of applicability of the requirements of this subpart, a ll hydrogen cyanide compounds. Raw hydrogen cyanide means hydrogen cyanide that has not been through the refining process. Raw hydrogen cyanide usually has a hydrogen cyanide concentration less than 10 percent. Refined hydrogen cyanide means hydrogen cyani de that has been through the refining process. Refined hydrogen cyanide usually has a hydrogen cyanide concentration greater than 99 percent. Refining process means the collection of equipment in a cyanide chemicals manufacturing processing unit used to

co ncentrate raw hydrogen cyanide from a concentration around 10 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 unit operation where refinedPage 91 of 197

hydrogen cyanide is reacted with sodium hydroxide and ends at the point the solid sodium cyanide product is shipped offs ite or used as a raw material in a downstream process. If raw hydrogen cyanide is reacted with sodium hydroxide 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 hydro xide 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 acrylon itrile production process when acrylonitrile is manufactured using the Sohio process. A Sohio hydrogen cyanide process unit begins at the point the hydrogen cyanide leaves the unit operation where the hydrogen cyanide is separated from the acrylonitrile (u sually referred to as the heads column). The Sohio hydrogen cyanide process unit ends at the point refined hydrogen 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 offsit e. If raw hydrogen cyanide isPage 92 of 197

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 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 th e raw materials are stored and ends just prior to the unit operation where water is removed from the sodium cyanide, usually in the drum filter. Wastewater streams containing discarded wastewater from the sodium cyanide production process are not considere d to be part of the wet

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

- end pr ocess vents. (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 aff ected 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 pointPage 93 of 197

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 o r operator shall determine the overall HAP emission reduction for process vents in a process unit using Equation 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.
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 t he 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,Page 94 of 197

determined in accordance with paragraph (g)(4)(ii) of this section.
E unc ,j = Uncontrolled HAP emissions from process vent j that is not controlled 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, rec overy, or recapture device. (ii) The control efficiency shall be assigned as specified in paragraph (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 dev ice 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 grea ter than 98 weight

- percent if they can provide engineering 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 t est has been conducted in accordance with the provisions of §63.997, the control efficiency shall be the efficiency determined by the performance test.Page 95 of 197

(5) Source category specific modifications to testing procedures
. (i) When identifying equipment subject to any equipment leak requirements, an owner or operator 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 owne r or operator to designate such equipment as never being 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
te sting personnel from meeting emergency evacuation requirements). 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 no t be required to monitor such equipment. (ii) For process vent hydrogen cyanide emissions that are vented to a control device other than a flare during startup, shutdown, and malfunction, the design evaluation must include documentation that the control de vice being used achieves the required control efficiency 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 malfunc tion by using a flare, an owner orPage 96 of 197

operator is not required 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 engi neering 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 flar e velocity and net heating value testing, as specified 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 a nd heat content of a flare in lieu of test data. These calculations are required to be submitted with the facilities' compliance test notification report for approval by the Administrator. (v) The data from any performance test method used to
measure HCN c oncentrations 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 (i) Reduce emissions of hydrogen cyanide byPage 97 of 197 refined hydrogen cyanide 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 op erations in an Andrussow, BMA, or Sohio hydrogen cyanide 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 reduce emissions from one or more process vents from continuous unit operations in the process unit must meet the applicable requirements specified in §63.982(a)(2); or (ii) Reduce emissions of total HAP from each process vent from a continuous unit operation in the process unit by using a flare meeting the requirements specified in §63.982(b); or (iii) Reduce emissions of total HAP from eachPage 98 of 197 process vent from a continuous unit operation in the proces s unit 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)(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 accor dance 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 of total HAP from each wet

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

- end process vent by 98 weight

- percent, or toPage 99 of 197 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 requireme nts 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 collection of process vents from continuou s 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 app licable requirements of §63.982(a)(2); or (ii) Reduce emissions of 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 th e requirements of §63.982(c)(2) or (d). (e) A transfer rack (1) The transfer rack is used to load refined hydrogen cyanide (i) Reduce emissions of hydrogen cyanide by using a flare meeting the requirements ofPage 100 of 197 into tank trucks and/or rail cars §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 venting emissions through a closed vent system to any combination of control devices meeting the req uirements 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 equipment listed in §63.1106(c)(1) that transports or contains wastewater liquid streams from a cyanide chemicals manufacturing process unit (1) The item of equipment meets the criteria specified in §63.1106(c) (1) through (3) and either (c)(4)(i) or (ii) (i) Comply with the 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 or contactPage 101 of 197 hydrogen cyanide are exempt from any requirements to install a cap, plug, blind fla nge, or second valve to be capped. (h) Spandex production applicability, definitions, and requirements

— (1) Applicability

— (i) Affected source
. For the spandex production (as defined in paragraph (h)(2) of this section) source category, the affected sourc e 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 located at a major source, as defined in section 112(a) of the Act. (A) All process vents (as defi ned in §63.1101). (B) All storage vessels (as defined in §63.1101) that store liquids containing organic HAP. (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) Equipment that is located within a spandex production process unit that is subject to this subpart but does not contain organic HAP.Page 102 of 197

(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 producti on 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 formation. Fiber spinning line means the group of equipment and process vents associ ated with spandex fiber spinning operations. The fiber spinning line includes the blending and dissolving tanks, spinning solution filters, spinning units, spin bath tanks, and 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 spand ex fiber means a manufactured synthetic fiber in which the fiber

- forming substance is a long

- chainPage 103 of 197

polymer comprised of at least 85 percent by mass of a segmented polyurethane. Spandex production means the production of synthetic spandex fibers. Spandex pr oduction 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 o wner 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 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 o f 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 Operate a Spandex Production Process Unit at a New or Existing Source? If you own or operate . . . And if . . . Then you must . . .Page 104 of 197

(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 su bpart 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 emis sions 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 that 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 total organic HAP or TOC must be reduced to a concentration of 20 parts per milli on by volume, whichever is less stringent. §63.1104 Process vents from continuous unit operations: applicability assessment procedures and methods.Page 105 of 197

(a) General
. The provisions 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 tha t 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 criteri a, 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 applicability criteria specified in the 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
pre sent) but prior to the inlet of any control device that is present, and prior to release to the atmosphere.Page 106 of 197

(2) Sampling site location if TRE determination is not required
. If the applicability criteria specified in the applicable table of §63.1103 does no t 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 cont rol 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 device 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 (0.9 9 pound per hour) prior to a combustion control device in compliance with §63.1103 (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) Applica bility 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, processPage 107 of 197

vent TRE index values, a nd 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 Administra tor specifies or approves alternate operating conditions
. For acrylic and modacrylic fiber production affected sources and polycarbonate production affected sources, operations during periods of malfunction shall not constitute representative conditions for the purpose of an applicability test. For all other affe cted 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 fro m a batch unit operation manifolded with at least one process vent from a continuous unit operation, the TRE shall be calculated during periods when one or more batch emission episodes are occurring that result in the highest organic HAP emission rate (in the combined vent 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;Page 108 of 197

(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 of 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 th is section or any 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 the 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 h our in which either an integrated sample or four grab samples shallPage 109 of 197

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 T OC (minus methane 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 computed for each run using Equation 1:

Where:
C TOC = Concentration of TOC (minus methane and ethane), dry basis, parts per million by volume.
C ji = Concentration of sample component j of the sample i, dry basis, parts per million by volume. n = Number of components 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 thePage 110 of 197

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 60, 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 determined 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 cou ld constitute process knowledge include calculations based on material balances, process stoichiometry, or previous test results provided the results are still relevant to the current process vent conditions. (iii) The organic compound used as the calibrat ion gas for Method 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.Page 111 of 197

(iv) The span value for Method 25A of 40 CFR part 60, appendix A shall be equal to t he appropriate control 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 of 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 be determined as specified in paragraph (f)(1) or (2) of this section and shall be recorded as specified in §63.1109(d). (1) Use Met hod 2, 2A, 2C, 2D, 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; orPage 112 of 197

(2) The engineer ing 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 engineerin g assessment procedures 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 vent is based on combustion at 25°C and 760 millimeters of mercury, but the standard temperature for determining the volume 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 million) −1 (gram

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

- mole per standard cubic me ter) 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)Page 113 of 197

of this section. For process vents that pass through a final steam jet and are not condensed, the moisture is assume d to be 2.3 percent 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 monox ide and hydrogen. (iii) Method 4 of 40 CFR part 60, appendix A to measure the moisture content of the stack gas. (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 organic 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:Page 114 of 197

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 (g ram - 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 se ction. If the TOC emission 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 emis sion rate is being calculated, 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 proce ss 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 inPage 115 of 197

paragraphs (i)(1) and (2) of this sectio n. 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 at oms (parts per million 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 engineering 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, or (iv) Any other method or data that have been 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, kilog ram per hour,Page 116 of 197

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 = Concentration 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.
M ji = Molecular weight of halogen atom i in compound j of the gas st ream, kilogram per kilogram

- 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 section, as applicable. (1) TRE index value equation
. The equation for calculating the TRE index value is Equation 5:Page 117 of 197

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, a s calculated according to paragraph (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.
E TOC = Emission rate of TOC (minus methane and ethane ), kilograms per hour, as calculated 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 −4Page 118 of 197 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 Percent Recovery 6.868×10

−1 3.209×10

−3 3.546×10 −3 1.306×10 −2

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 processPage 119 of 197

vents at existing and 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,

s hall calculate 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 determine 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 requirement s of paragraphs (k)(1) through (4) of this section. If a process vent 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 control 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 cal culated using such engineering assessment and the TRE index value equation inPage 120 of 197

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 TRE 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 ex amples specified in paragraphs (k)(3)(i) through (iv) of this section: (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 representative 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
.Page 121 of 197

(iv) Design analysis 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 capaciti es, (C) Estimation 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. (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 a pplicable. (l) Applicability 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
proce ss vent according to the procedures of paragraph (j) ofPage 122 of 197

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 engin eering assessments, 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 rat e records
. The owner 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 speci fied 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). (3) Concentration records
. The owner or o perator shall record 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 deter mined through engineering assessment as specified in paragraph (k) of this section. As specified in paragraph (m) of this section, the owner or operator shall include thisPage 123 of 197

information in the Notification of Compliance Status report required by §63.1110(a)( 4). (4) Process change 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 rat e, regulated organic 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 requ ired by §63.1110(a)(4), the information recorded in paragraph (l)(1) through (3) of this section. (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 opera tor 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 speci fied in paragraphs (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 requiredPage 124 of 197

under paragraphs (e), (f), and (j ), and recorded under 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 resu lt 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 process change does not result in additional applicable requirements, then the owner or operator shall include a statement documenting this in the next Periodic Report required by §63.1110(a)(5) after the process change was made. (n) Parameter mo nitoring of certain 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 de vice shall report 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 criteri a used to select parameter(s). AnPage 125 of 197

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 comp ly with the requirements 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 collect 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). (2) A closed vent system designed to collect H AP

- containing vapors 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 t he HAP vapors displaced 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 se ctionPage 126 of 197

or to a fuel 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 not 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 system 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 common header, or to compress and route collected HAP vapors to a
p rocess. (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 a re vented to a control device used to comply with the provisions of this subpart, such control device shall be operating.Page 127 of 197

(d) Tank trucks and railcars
. The owner or operator shall load HAP

- containing materials only into tank trucks and railcars that meet t he requirement in paragraph (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 for 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
tru ck or railcar tank will not drop more than 750 pascals within 5 minutes after it is pressurized to a minimum of 4,500 pascals. (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 device 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 equippedPage 128 of 197

with a vapor collection system that is compatible with the transfer rack's closed vent s ystem or process piping. (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 pressure test procedures specified in Method 27 of appendix A to 40 CFR part 60. (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 railcar 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 guardPage 129 of 197

will not allo w 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 with 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. (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 p rimary 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, ow ners and operators are 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 i n §§63.132, 63.133, and 63.137, thePage 130 of 197

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. (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) a nd 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 speci fied 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 keep records of eachPage 131 of 197

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 complian ce dates specified in §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 4 ) 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, the Periodic Report requirements contained in §63.1110(a)( 4 5 ) 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 c )(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
comp ly 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 emissio ns.Page 132 of 197

(ii) The use of Method 25A 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 zeroe d 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 Notif ication requirements in §63.182(b) are referred to in §63.148(j), the requirements in §63.1110(c) shall apply, for the purposes of this subpart. (16) For the purposes of this subpart, §63.148(k) shall not apply. (b) Maintenance wastewater
. The owner or ope rator 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 t hat are not defined in §63.1101, 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 cri teriaPage 133 of 197

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 i dentified 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; (v) Pipe; (vi) Oil/water separator; and (vii) Tanks with capacities of 38 m 3 or greater. (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 totalPage 134 of 197

annual average concentratio n 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 pe r 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. The owner or operator shall determine the characteristics of the stream as specified in paragraphs (c)(4) (ii)(A) and (B) of this section. (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 sha ll apply.Page 135 of 197

(6) When Table 35 of 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 owner or operator shall r educe emissions of total organic HAP by 95 weight

- percen t by venting emissions through a closed vent system to any combination of control devices meeting the requirements in §63.982(a)(1), for the purposes of this subpart. (d) The compliance date for the affected sources subject to the provisions of this sectio n 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 in 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.Page 136 of 197

(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. (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 o wner or operator must comply with the requirements specified in paragraphs (e)(1) and (2) of this section for pressure relief devices in organic HAPPage 137 of 197

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 r equirements . 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 described in 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, the owner or operator must comply with either paragraph (e)(2)(i) or (ii) of this section following a pressure release , as applicable. (i) If the pressure relief dev ice does not consist of or include a rupture disk, conduct instrument monitoring, as described in 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 re lease to verify that the pressure relief device is operating with an instrument reading of less than 500 ppm above background , except as provided in § 63.171 or 63.1024(d) , as applicable
.Page 138 of 197

(ii) If the pressure relief device consists of or includes a rupture disk, install a replacement disk as soon as practicable after a pressure release, but no later than 5 calendar days after the pressure release , except as provided in § 63.171 or 63.1024(d), as applicable
. (3) Pressure release management . Except as specifi ed in paragraph (e)(4) of this section, emissions of organic HAP to the atmosphere from pressure relief devices in organic HAP service are prohibited, and 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 in organic HAP service. (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 : (A) I dentifying the pressure r elease; (B) R ecording the time and duration of each pressure release ; and (C) N otifying operators immediately that a pressure release is occurring. The device or monitoring system may be either specific to the pressure relief device itself or may be

assoc iated with the 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, aPage 139 of 197

rupture disk indicator, magnetic sensor, motion detector on the
pressure relief valve stem, flow monitor, or pressure monitor. (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 HAP released durin g 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 kno wledge. (4) Pressure relief devices routed to a control device , process , fuel gas system, or drain system . If a pressure relief device in organic HAP service is designed and operated to route all HAP emissions from pressure releases through a closed vent system to a control device or to a process, fuel gas system, or drain system, the owner or operator is not required to comply with paragraphs (e)(1), (2), or (3) (if applicable) of this section for that pressure reli ef device
. T he fuel gas system or closed vent system and control device (if applicable) must meet the requirements of § 63.172 or 63.1034 , as applicable (except that the term “pressure relief devices” shall apply instead of the term “equipment leaks” in § 63.1034)
. The drain system (if applicable) must meet the requirements of § 63.136.Page 140 of 197

(f) Recordkeeping requirements . For acrylic and modacrylic fiber production affected 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 vent to a fuel gas system, process, drain system,

or closed

- vent system and control device, under the provisions in paragraph (e)(4) of this section. (2) A list of identific ation numbers for pressure relief devices subject to the provisions 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)(ii) of this sect ion. (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 co mpliance
test. (ii) The maximum instrument reading measured at each piece of equipment during each compliance test.Page 141 of 197

(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) The 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 a nd the calculations used for determining this quantity. (iv) The actions taken to prevent this pressure release. (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 ( g )(1) through (3) of this section for pressure relief devices in o rganic HAP service. (1) For pressure relief devices in organic 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 or ganic HAP gas or vapor service subject to paragraph (e)(2) of this section, report anyPage 142 of 197

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 subject 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 da te, time, and duration of the pressure release. (iii) An estimate 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 Compliance with standards and operation and maintenance requirements. (a) Requirements
. The requirements of paragraphs (a)(1), (2), and (5) of this section apply to all affected sources except acry lic and modacrylic fiber production affected sources and polycarbonate production affected sources. The requirements of paragraph (a)(4) of this section apply only to acrylic and modacrylic fiber production affected sources and polycarbonate production aff ected sources. The requirements of paragraphsPage 143 of 197

(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 one 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 a pplicable provisions of this subpart and any of the subparts 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 categ ory, such requirements shall apply at all times except during 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 emissions to which the equipment leak requirements apply.Page 144 of 197

(3) For batch unit operations, shutdown does not include the normal periods between batch cycles; and startup does not include the recharging of batc h unit operations, or the transitional conditions due to changes in product. (4) (i) [Reserved] 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) resulting in cessation of the emissions to which this subpart applies. Equipment leak requirements shall apply at all t imes 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 affected source, including associated air pollution control equipment and monitoring equipment, in a manner consistent with safety and good air pollution control practices for minimizing emissi ons. The general duty to minimize emissions does not require the owner or operator to make any further efforts to reduce emissions if levels required by the applicable standard have been achieved. Determination of whetherPage 145 of 197

a source is operating in complianc e 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 rec ords, and inspection of the source. (5) During startups, 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 shall 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 lim ited 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 thei r occurrence.Page 146 of 197

(7) Operation and maintenance requirements 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
. Compliance 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 ar e required to perform continuous monitoring. For each excursion , except for excused excursions (as described in §63.998(b)(6)(ii)), and as provided for in paragraph s (b)( 1 2 ) (i) and (ii) 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 operating conditions. (i) An excursion that meets the requirements of paragraph (b)(2) of this section is not a violation. (ii) Excused excursions are not allowed for acrylic and modacrylic fiber production affected sources or polycarbonate production affected sources. For all other affected sources, an excused excursion, as described in §63.998(b)(6)(ii), is not a violation. (2) Parameter monitoring: Excursions
. An excursion is not a violation in cases where continuous monitoring is required andPage 147 of 197

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 t he 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
. Nothing in this paragraph shall be construed to allow or excuse a monitoring param eter 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 op eration and maintenance procedures are being used will be based on information available to the Administrator. This information may include, but is not limited to, monitoring results, review of operation and maintenance procedures (including the startup, s hutdown, and malfunction plan under §63.1111), review of operation and maintenancePage 148 of 197

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 standard s, including those for equipment leaks, shall be determined according to paragraph (b)(5) of this section. (i) Applicability assessments
. Unless otherwise specified in a relevant 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 the results of the three runs shall apply when assessing applicability. Upon recei ving approval from the Administrator, results of a test run may be replaced with results of an additional test run if it meets the criteria specified in paragraphs (a)(4)(i)(A) through (D) of this section. (A) A sample is accidentally lost after the testin g team leaves the site; orPage 149 of 197

(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
. (A) The Administrator may determine compliance with emission limitations of this subpart based on, but not limited to, the results of performance tests conducted according to the procedures specified in §63.997 of this part , unless otherwise specified in this subpart or a subpart referenced by this subpart. (B) For acrylic and modacrylic fiber production affected sources and polycarbonate production affected sources, performance tests shall be conducted under such conditions as the A dministrator specifies to the owner or operator based on representative performance of the affected source for the period being tested. Representative conditions exclude periods of startup and shutdown unless specified by the Administrator or an applicable subpart. The owner or operator may not conduct performance tests during periods of malfunction. The owner or operator must record the process information that is necessary to document operating conditions during the test and include in such record an expl anation to support that such conditionsPage 150 of 197

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 mainten ance 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 conformance 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 determine compliance with design, equipment, work practice, or operat ional 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 requirements as specified in this subpart, and in the subparts refere nced 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 requirement as 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 reportsPage 151 of 197

of performance test results, monitoring results, and other information, if applicable) and any information available to the
A dministrator 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 findi ngs 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, monthly, 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 changed by mutual agreement between the owner or operator and the A dministrator, 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. (2) When the period specified for complia nce is a standard calendar period, if the initial compliance date occurs after the beginning of the period, compliance shall be required accordingPage 152 of 197

to the schedule specified in paragraph (d)(2) (i) or (ii) of this section, as appropriate. (i) Compliance sha ll 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 weeks 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 first 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 required task at any time during the specified period, provided th e 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 o r operator of each affected source subject to this subpart shall keep copies of notifications, reports and records required byPage 153 of 197

this subpart and subparts referenced by this subpart for at least 5 years, unless otherwise specified under this subpart. (b) Cop ies 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 reports. This paragraph applies only to reports and not the underly ing 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 hard 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 used to assess control applicability under §63.1103 (e.g., combin ed total annual emissions of regulated organic HAP). §63.1110 Reporting requirements. (a) Required reports
. Each owner or operator of an affected source subject to this subpart shall submit the reports listedPage 154 of 197

in paragraphs (a)(1) through (8) of this sectio n, 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 also submit the reports listed in paragraph (a)(9) of this section in addition to the reports listed in paragraphs (a)(1) through ( 8 ) , 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)
. (8) Other reports. Other report s shall be submitted as specified elsewhere in this subpart and subparts referenced by this subpart.Page 1 55 of 197

(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 r esults 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 supported 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 operators, who claim that so me 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 disc, flash drive, or other commonly us ed 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 m ust be 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, thePage 156 of 197

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 applicability 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 application for approval of construction or reconstruction required under §63.5(d) of subpart A of this part may be used to fulfill the initial notification requirements.Page 157 of 197

(1) The initial notification shall be postmarked within 1 year after the source becomes subject to this subpar t. (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, identification 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 identifie d 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 shall submit a Notificati on of Compliance Status for each affected source subject to this subpart containing the information specified in paragraphs (d)(1)(i) and (d)(1)(ii) of this section. For pressure relief devices subject to the requirements of § 63.1107(e)(3), the owner or o perator of an acrylic and modacrylic fiber production affected source orPage 158 of 197

polycarbonate production affected source shall also submit the information listed in paragraph (d)(1)(iii) of this section in a supplement to the Notification of Compliance Status within 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, this 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 gi ven 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 app licable), and a description of the alarms or other methods by which operators will be notified of a pressure release. (2) Due date
. The owner or operator shall submit the Notification of Compliance Status for each affected source 240 days after the complia nce date specified for the affected source under this subpart, or 60 days after completion of the initialPage 159 of 197

performance test or initial compliance assessment, whichever is earlier. Notification of Compliance Status reports may be combined for multiple affect ed 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 s ubpart 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. (3) Overlap with title V reports
. Information required by this subpart, which is submitted with a title V peri odic report, need not also be included in a subsequent Periodic Report required by this subpart or subpart referenced by this subpart.Page 160 of 197

The title V report shall be referenced in the Periodic Report required by this subpart. (f) General report content
. All 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 t his 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 affec ted source. Summaries and groupings of this information are permitted. (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 anPage 161 of 197

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 St andards, 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 Stat e 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 requi rements 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. (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 co mmunications

— (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 reportPage 162 of 197

for the facility. The owner or operator using this option need not obtain prio r 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 im plementing 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

su bmitted 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 paragra ph (h)(1) of this section, until an adjustment of a time period or postmark deadline has been approved by the Administrator under paragraphs (h)(5) and (6) of this section, the owner or operator of an affected source remains strictly subject to the require d 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 paragraphsPage 163 of 197

(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 ne ed 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

re quest 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 request whateve r 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 perio d or postmark deadline is warranted, the Administrator will approve the adjustment. The Administrator will notify the owner or operator in writing ofPage 164 of 197

approval or disapproval of the request for an adjustment within 15 calendar days of receiving sufficient i nformation 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. §63.1 111 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 durin g periods of startup, shutdown, and malfunction. This plan shall also include 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 addre ss 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 titlePage 165 of 197

V p ermit. 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 pu rpose 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 minimiz e 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 maintain 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 isPage 166 of 197

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 alternative 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 aPage 167 of 197

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 quickly 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). (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 startup, shutdown, and malfunction plan within 45 days after the event toPage 168 of 197

include detailed procedures for operating and maintaining the affected source during similar malfunction events and a program of corrective action for similar malfunctions of pr ocess 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 polycarbonate 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 monitor ing system required for compliance (including actions taken to correct a malfunction) are consistent with the procedures specified in the affected source's plan, then the owner or operator shall state such information in a startup, shutdown, and malfunctio n report. During the reporting period, reports shall only be required for startups, shutdowns, and malfunctions during 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 otherwise under this subpart or a subpart referenced by thisPage 169 of 197

subpart or as established otherwise by the permitting authority in the affected s ource'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 th e 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 nu mber of startup, shutdown, and malfunction events and the total duration of all periods of startup, shutdown, and malfunction for the reporting period if the total duration amounts to either of the durations in paragraphs (b)(1)(ii)(A) or (B) of this secti on. Records of the number of CPMS startup, shutdown, and malfunction events and the total duration of all periods of startup, shutdown, and malfunction for the reporting period are required under §63.998(c)(1)(ii)(C) and (D) of this section. (A) Total dura tion 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 1Page 170 of 197

pe rcent of that affected source's operating time for the reporting period. (iii) Records documenting each startup, shutdown and malfunction event as required under §63.998(c)(1)(ii)(F). (iv) Records documenting the total duration of operating time as require d under §63.998(c)(1)(ii)(H). (2) Immediate startup, shutdown, and malfunction reports
. Notwithstanding the allowance to reduce the frequency of reporting for startup, shutdown, and malfunction reports under paragraph (b)(1) of this section, any time an ac tion 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 working 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 official who is certifying its accuracy, explaining the circumstances of the event, the reasons for not following the startup, shutdown, and mal function plan, and whether any excess emissions and/or parameter monitoring exceedances are believed to have occurred.Page 171 of 197

Notwithstanding the requirements of the previous sentence, after the effective date of an approved permit program in the State in which a n affected source is located, the owner or operator may make alternative reporting arrangements, in advance, with the permitting authority in that State. Procedures governing the arrangement of alternative reporting requirements under this paragraph are sp ecified in §63.1110(h). (3) [Reserved] (c) Malfunction recordkeeping and reporting
. The requirements of this paragraph (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 (iii) 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. (ii) For each failure to meet an applicable standard, record and retain a list of the affected sources or equipment, an estimate of the quantity of each regulated pollutant emitted over any emission limit, and a description of the method used to estimate the emissions.Page 172 of 197

(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 quantity of each regulated pollutant emitted over any emission limit, and a description of the method used to estimate the emissions. §63.1112 Extension o f compliance, and performance test, monitoring, recordkeeping and reporting waivers and alternatives. (a) Extension 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 the 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 re ductions
. Pursuant to section 112(i)(5) of the Act, if the owner or operator of an existing sourcePage 173 of 197

demonstrates that the source has achieved a reduction in emissions of hazardous air pollutants in accordance with the provisions of subpart D of this part, t he Administrator will grant the owner or operator an extension of compliance with specific requirements of this part, 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 ex isting source has installed best available control technology (BACT) (as defined in section 169(3) of the Act) or technology required to meet a lowest achievable emission rate (LAER) (as defined in section 171 of the Act) prior to the promulgation of an em ission 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

s tandard that will apply until the date 5 years after the date on which such installation was achieved, as determined by the Administrator. (3) Request for extension of compliance
. Paragraphs (a)(4) through (7) of this section concern requests for an extens ion of compliance with a relevant standard under this part (except requests for an extension of compliance under paragraphPage 174 of 197

(a)(2)(i) of this section will be handled through procedures specified in subpart D of this part). (4) Requests for extensions of com pliance for section 112 standards
. (i) Section 112(d) standards
. (A) The owner or operator of an existing source who is unable to comply with a relevant standard established under this part pursuant to section 112(d) of the Act may request that the Adminis trator grant an extension allowing the source up to 1 additional year to comply with the standard, if such additional period is necessary for the installation of controls. The owner or operator of an affected source who has requested an extension of compli ance under this paragraph and who is otherwise required to obtain a title V permit shall apply for such permit or apply 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 according to the provisions of part 70 or Federal title V regulations in this chapter (42 U.S.C. 7661), whichever are applicable. (B) Any request und er this paragraph for an extension of compliance with a relevant standard shall be submitted in writing to the appropriate authority not later than 12 months before the affected source's compliance date (as specified in §63.1102) for sources that are not i ncluding emission points inPage 175 of 197

an emissions average, or not later than 18 months before the affected source's compliance date (as specified in §63.1102) for sources that are including emission points in an emissions average. Emission standards established und er this part may specify alternative dates for the submittal of requests for an extension of compliance if alternatives 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 existing 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 with 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 will be protected from imminent endangerment. Any request for an extension of compliance with a relevant standard under this paragraph shall b e submitted in writing to the Administrator not later than 15 days after the effective date of the relevant standard.Page 176 of 197

(5) Requests for extensions of compliance for BACT or LAER
. The owner or operator of an existing source who has installed BACT or technolo gy required to meet LAER (as specified in paragraph (a)(2)(ii) of this section) prior to the promulgation of a relevant 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 th at source by the relevant emission standard. (6) Contents of request
. (i) The request for a compliance extension under paragraph (a)(4) of this section shall include the following information: (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:Page 177 of 197

( 1 ) The date by which contracts for emission control systems or process changes for emissi on control will be awarded, or the date by which orders will be issued for the purchase of component parts to accomplish emission control or process changes; ( 2 ) The date by which on

- site construction, installation of emission control equipment, or a proce ss 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 emissio n control steps, that will be taken during the extension period, including milestones to assure proper operation and maintenance of emission control and process equipment; and (D) Whether the owner or operator is also requesting an extension of other appli cable requirements (e.g., performance testing requirements). (ii) The request for a compliance extension under paragraph (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 thePage 178 of 197

same pollutant (or stream of pollutants) that would be controlled at that 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 concern approval of an extension of compliance requested under paragraphs (a)(4) through (6) of this section. (9) General
. Based on the i nformation provided in any request made under paragraphs (a)(4) through (6) of this section, or other information, the Administrator 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; (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 toPage 179 of 197

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 o peration and maintenance of the installed controls during the extension period. (11) Progress reports . The owner or operator of an existing source that has been granted an extension of compliance under paragraph (a)(10) of this section may be required to s ubmit to the Administrator progress reports indicating whether the steps toward compliance outlined in the compliance schedule have been reached. The contents of the progress reports and the dates by which they shall be submitted will be specified in the w ritten extension of compliance granted under paragraph (a)(9) of this section. (12) Notifications to owners and operators regarding compliance extensions for section 112(d) standards
. (i) The Administrator will notify the owner or operator in writing of
ap proval 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)(i) or (a)(5) of this section. The 30

- day approval or denial perio d will begin after the owner or operator has been notified in writing that his/her application isPage 180 of 197

complete. The Administrator will notify the owner or operator in writing of the status of his/her application, that is, whether the application contains suffi cient information to make a determination, within 30 days after receipt of the original application and within 30 days after receipt of any supplementary information that is submitted. (ii) When notifying the owner or operator that his/her application is n ot 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 30 days after he/she is notified of the incomplete application, additional inf ormation 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 issu e 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, ad ditional information or arguments to the Administrator before further action on the request.Page 181 of 197

(iv) The Administrator's final 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) No tifications 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 withi n 30 days after receipt of sufficient information to evaluate a request submitted under paragraph (a)(4)(ii) 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 Administrator 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 15 days after receipt of the original applica tion 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 thePage 182 of 197

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 the incomplete application, additional information or arguments to the Administrator to enable further action on the application. (iii) B efore 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 d enial 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. (i v) A final 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 argum ent (if the application is complete), or within 30 days after the final date specified for the presentation if no presentation is made. (14) Termination of extension
. The Administrator may terminate an extension of compliance at an earlier date thanPage 183 of 197

specif ied if any specification under paragraphs (a)(10)(iii) or (iv) of this section is not met. (15) [Reserved] (16) Administrator'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 testing 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 the 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) of 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 own er or operator hasPage 184 of 197

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 application 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 plan 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 wai ver of a performance test made under paragraph (b)(3) of this section when he/she

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

- specific test plan; orPage 185 of 197

(iii) Makes a determinat ion 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 under this section shall not abrogate the Administrator's authority under the Act or in any way prohibit the Administrator from later canceli ng the waiver. The cancellation will be made only after notice is given to the owner or operator of the affected source. (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 applicatio n, the Administrator may approve alternatives to any monitoring methods or procedures of this part including, but not limited to, the following: (i) Alternative monitoring requirements when installation of a CMS specified by a relevant standard would not p rovidePage 186 of 197

accurate measurements due to liquid water or other interferences caused by substances within the effluent 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) Alternative locations for installing CMS when the owner or operator can demonstrate that installation at alternate locations will enable accurate and repr esentative 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 adequately demonstrate a definite and consistent relationship between their measurements and the measurements of opacity by a system complying with the requirements as specified in the relevantPage 187 of 197

standard. The Administrator may require that such demonstration be performed for each affected source; or (ix) Alternative monitoring requirements when the effluent from a single affected source or the combined effluent from two or more affected sources is released to the atmosphere thr ough 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 th e use of a method, requirement, or procedure specified in this section or in the relevant standard. If the results of the specified and alternative method, requirement, or procedure do not agree, the results obtained by the specified method, requirement, o r procedure shall prevail. (4)(i) Request to use alternative monitoring method
. An owner or operator who wishes to use an alternative monitoring method shall submit an application to the Administrator as described in paragraph (c)(4)(ii) of this section. T he application may be submitted at any time provided that the monitoring method is not used to demonstrate compliance with a relevant standard or other requirement. If the alternative monitoring method is to be used to demonstrate compliance with a relevan t standard, the application shall be submitted not laterPage 188 of 197

than with the site

- specific test plan required, or with 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 alterna tive monitoring method, such as the technical or economic infeasibility, or the impracticality, of the affected source using the required method. (iii) The owner or operator may submit the information required in this paragraph well in advance of the submi ttal 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 mon itoring method
. (i) The Administrator will notify the owner or operator of approval or intention to deny approval of the request to use an alternative monitoring method within 30 days after receipt of the original request and within 30 days after receipt o f any supplementary information that is submitted. Before disapproving any request to use an alternative monitoring method, thePage 189 of 197

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 the owner or operator to present additional information to the Administrator before final action on the request. At the time the Administrator notifi es the applicant of his or her intention to disapprove the request, the Administrator will specify how much time the owner or operator will have after being notified of the intended disapproval to submit the additional information. (ii) The Administrator m ay establish general procedures and criteria in a relevant standard to accomplish the requirements of paragraph (c)(5)(i) of this section. (iii) If the Administrator approves the use of an alternative monitoring method for an affected source under
paragrap h (c)(5)(i) of this section, the owner or operator of such source shall continue to use the alternative monitoring method until he or she receives approval from the Administrator to use another monitoring method as allowed by this subpart or a subpart refe renced by this subpart. (6) Alternative to the relative accuracy test
. An alternative to the relative accuracy test for CEMS specified in a relevant standard may be requested as follows:Page 190 of 197

(i) Criteria for approval of alternative procedures
. An alternative t o the test method for determining relative accuracy is available for affected sources with emission rates demonstrated to be less than 50 percent of the relevant standard. The owner or operator of an affected source may petition the Administrator under par agraph (c)(6)(ii) of this section to substitute the relative accuracy test in section 7 of Performance Specification 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 accuracy 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. (ii) Petition to use alternative to relative accuracy test
. The petit ion to use an alternative to the relative accuracy test shall include a detailed description of the procedures to bePage 191 of 197

applied, the location and the procedure for conducting the alternative, the concentration or response levels of the alternative relative ac curacy 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 intende d use of the CEMS data and may require specifications more stringent than in Performance Specification 2. (iii) Rescission of approval to use alternative to relative accuracy test . The Administrator will review the permission to use an alternative to the C EMS relative accuracy test and may rescind such permission if the CEMS data from a successful completion of the alternative relative accuracy procedure indicate that the affected source's emissions are approaching the level of the relevant standard. The cr iterion for reviewing the permission is that the collection of CEMS data shows that emissions have exceeded 70 percent of the relevant standard for any averaging period, as specified in the relevant standard. For affected sources subject to emission limita tions expressed as control efficiency levels, the criterion for reviewing the permission is that the collection of CEMS data shows that exhaust emissions have exceeded 70 percent of the level needed to meet the control efficiency requirement for any averag ingPage 192 of 197

period, as specified in the relevant standard. The owner or operator of the affected source shall maintain records and determine the level of emissions relative to the criterion for permission to use an alternative for relative accuracy testing. If thi s criterion is exceeded, the owner or operator shall notify the Administrator within 10 days of such occurrence and include a description of the nature and cause of the increased emissions. The Administrator will review the notification and may rescind per mission to use an alternative and require the owner or operator to conduct a relative accuracy test of the CEMS as specified in section 7 of Performance Specification 2. (d) Waiver of recordkeeping or reporting requirements
. (1) Until a waiver of a recordk eeping or reporting requirement has been granted by the Administrator under this paragraph, the owner or operator of an affected source remains subject to the recordkeeping and reporting requirements of this subpart and any subparts referenced by this subp art. (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 an extension of co mpliance, or the owner or operator has requested an extension of compliance and the Administrator is still considering that request.Page 193 of 197

(3) If an application for a waiver of recordkeeping or reporting is made, the application shall accompany the request for a n extension of compliance under paragraph (a) of this section, any required compliance progress report or compliance status report required under this part or in the source's title V permit, or an excess emissions and continuous monitoring system performan ce report required under §63.999(c) or another subpart referenced by this subpart, whichever is applicable. The application shall include whatever information the owner or operator considers useful to convince the Administrator that a waiver of recordkeepi ng or reporting is warranted. (4) The Administrator will approve or deny a request for a waiver of recordkeeping or reporting requirements under this paragraph when he/she

— (i) Approves or denies an extension of compliance under paragraph (a) of this secti on; or (ii) Makes a determination of compliance following the submission of a required Notification of Compliance Status report or excess emissions and continuous monitoring systems performance report; or (iii) Makes a determination of suitable progress to wards compliance following the submission of a compliance progress report, whichever is applicable.Page 194 of 197

(5) A waiver 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 abrogate the Administrator's authority under the Act or in any way prohibit the Administrator from later canceling the waiver. The cancellation will be m ade only after notice is given to the owner or operator of the affected source. §63.1113 Procedures for approval 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 a lternative means of emission limitation will achieve a reduction in HAP emissions at least equivalent to the reduction in emissions from that source achieved under any design, equipment, work practice, or operational standards (but not performance standard s) in this subpart, the Administrator will publish in the Federal Register a notice permitting the use of the alternative means for purposes of compliance with that requirement.Page 195 of 197

(1) The notice may condition the permission on requirements related to the ope ration and maintenance of the alternative

means. (2) Any such notice shall be published only after public notice and 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 showing 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. If 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 pertinent conditions during testing or monitoring. (2) The owner or operator who requests an alternative means of emissions limitation s hall submit a description of the proposed testing, monitoring, recordkeeping, and reporting that will be used and the proposed basis for demonstrating compliance.Page 196 of 197

(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 baromet ric pressure, or an engineering analysis that the Administrator determines to be an accurate method of determining equivalence. (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 referenced subparts. §63.1114 Implementation and enforcement. (a) This subpart can be implemented and enforced by the U.S. Environmental Pro tection Agency (EPA), or a delegated authority such as the applicable State, local, or tribal agency. If the EPA Administrator has delegated authority to a State, local, or tribal agency, then that agency has the authority to implement and enforce this sub part. Contact the applicable EPA Regional Office to find out if this subpart is delegated to a State, local, or tribal agency. (b) In delegating implementation and enforcement authority of this subpart to a State, local, or tribal agency under 40 CFRPage 197 of 19 7

part 63, subpart E, the authorities contained in paragraphs (b)(1) through (5) of this section are retained by the EPA Administrator and are not transferred to the State, local, or tribal agency. (1) Approval of alternatives to the nonopacity emissions standard s 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 the requirements in §63.1113 to request permission to use an alternative means of emission limitation. Where these standards referenc e 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 reporting under §63.10(f) and as defined in §63.90.