National Emission Standards for Hazardous Air Pollutants for Flexible Polyurethane Foam Production

SUMMARY: This proposed rule would reduce emissions of hazardous air

pollutants (HAP) from existing and new facilities that manufacture

flexible polyurethane foam. In the production of flexible polyurethane

foam a variety of HAP are used as reactants or process solvents. The

HAP emitted by the facilities covered by this proposed rule include

methylene chloride, toluene diisocyanate, methyl chloroform, methylene

diphenyl diisocyanate, propylene oxide, diethanolamine, methyl ethyl

ketone, methanol, and toluene. Methylene chloride comprises over 98

percent of the total HAP emissions from this industry. This proposed

rule is estimated to reduce emissions of these pollutants by over

12,500 Megagrams per year (Mg/yr), with over 99 percent of this total

expected to be methylene chloride emission reductions. The emission

reductions achieved by these standards, when combined with the emission

reductions achieved by other similar standards, will achieve the

primary goal of the Clean Air Act, which is to ``enhance the quality of

the Nation's air resources so as to promote the public health and

welfare and the productive capacity of its population.''

This proposed rule implements section 112(d) of the Clean Air Act

of 1990 (CAAA), which requires the Administrator to regulate emissions

of HAP listed in section 112(b) of the CAAA. The intent of this rule is

to protect the public by requiring the maximum degree of reduction in

emissions of HAP from new and existing major sources, taking into

consideration the cost of achieving such emission reduction, and any

nonair quality, health and environmental impacts, and energy

requirements.

DATES: Comments. Comments must be received on or before February 25,

1997.

Public Hearing. If anyone contacts the EPA requesting to speak at a

public hearing by January 17, 1997, a public hearing will be held on

January 27, 1997 beginning at 10 a.m. Persons interested in attending

the hearing should call Ms. Marguerite Thweatt at (919) 541-5607 to

verify that a hearing will be held.

Request to Speak at Hearing. Persons wishing to present oral

testimony must contact the EPA by January 17, 1997 by contacting Ms.

Marguerite Thweatt, Organic Chemicals Group (MD-13), U.S. Environmental

Protection Agency, Research Triangle Park, North Carolina 27711,

telephone number (919) 541-5607.

ADDRESSES: Comments. Comments should be submitted (in duplicate, if

possible) to: Air Docket Section (LE-131), Attention: Docket No. A-95-

48, U.S. Environmental Protection Agency, 401 M Street SW., Washington,

DC 20460. The EPA requests that a separate copy also be sent to the

contact person listed below. The public hearing, if required, will be

held at the EPA's Office of Administration Auditorium, Research

Triangle Park, North Carolina.

The docket is located at the above address in room M-1500,

Waterside Mall (ground floor), and may be inspected from 8:00 a.m. to

5:30 p.m., Monday through Friday; telephone number (202) 260-7548. A

reasonable fee may be charged for copying docket materials.

FOR FURTHER INFORMATION CONTACT:

For information concerning this proposed rule, contact Mr. David

Svendsgaard at (919) 541-2380, Organic Chemicals Group, Emission

Standards Division (MD-13), U.S. Environmental Protection Agency,

Research Triangle Park, North Carolina 27711.

SUPPLEMENTARY INFORMATION:

Regulated Entities

Entities regulated by this action, upon promulgation, are flexible

polyurethane foam production facilities. Regulated categories and

entities include:

------------------------------------------------------------------------

Category Examples of regulated entities

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Industry........................ Producers of slabstock, molded, and

rebond flexible polyurethane foam.

------------------------------------------------------------------------

This table is not intended to be exhaustive, but rather provides a

guide for readers regarding entities likely to be regulated by this

action. This table lists the types of entities that EPA is now aware

could potentially be regulated by this action. Other types of entities

not listed in the table could also be regulated. To determine whether

your facility is regulated by this proposed action, you should

carefully examine the applicability criteria in section 63.1290 of the

proposed rule. If you have questions regarding the applicability of

this action to a particular entity, consult the person listed in the

preceding FOR FURTHER INFORMATION CONTACT section.

In addition to its inclusion in this Federal Register notice, the

regulatory text is available in Docket No. A-95-48, or from the EPA

contact person designated in this notice. The proposed regulatory

language is also available on the Technology Transfer Network (TTN) on

the EPA's electronic bulletin boards. The TTN provides information and

technology exchange in various areas of air pollution control. The

service is free, except for the cost of a telephone call. Dial (919)

541-5742 for up to a 14,400 bps modem. For further information, contact

the TTN HELP line at (919) 541-5348, from 1:00 p.m. to 5:00 p.m. Monday

through Friday, or access the TTN web site at: http://

ttnwww.rtpnc.epa.gov.

The Basis and Purpose Document which contains the rationale for the

various components of the standard, is available in the docket and on

the TTN. This document is entitled Hazardous Air Pollutant Emissions

from the Production of Flexible Polyurethane Foam--Basis and Purpose

Document for Proposed Standards, September 1996, and has been assigned

document number EPA-453/D-96-008a.

Other materials related to this rulemaking are available for review

in the docket. Some of the technical memoranda have been compiled into

a single document, the Supplementary Information Document (SID), to

allow interested parties more convenient access to the information. The

SID is available in the docket (Docket No. A-95-48 Category III-B),

and, in limited supply, from the EPA Library by calling (919) 541-2777.

The document is entitled Hazardous Air Pollutant Emissions from the

Production of Flexible Polyurethane Foam--Supplementary Information

Document for Proposed Standards, October 1996, and has been assigned

document number EPA-453/D-96-009a.

A record has been established for this rulemaking under docket

number A-95-48 (including comments and data submitted electronically as

described below). A public version of this record, including printed,

paper versions of electronic comments, which does not include any

information included as CBI, is available for inspection from 8:00 a.m.

to 5:30 p.m. Monday-Friday, excluding legal holidays. The public record

is located in the Air & Radiation Docket & Information Center, Room

M1500, 401 M Street S.W., Washington, D.C. 20460. Electronic comments

can be

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sent directly to EPA at: [email protected].

Electronic comments must be submitted as an ASCII file avoiding the

use of special characters and any form of encryption. Comments and data

will also be accepted on disks in WordPerfect 5.1 format or ASCII file

format. All comments and data in electronic form must be identified by

the docket number A-95-48. No Confidential Business Information (CBI)

should be submitted through e-mail. Electronic comments on this

proposed rule may be filed online at many Federal Depository Libraries.

The official record for this rulemaking, as well as the public

version, as described above, will be kept in paper form. Accordingly,

the EPA will transfer all comments received into printed, paper form as

they are received and will place the paper copies in the official

rulemaking record, which will also include all comments submitted

directly in writing. The official rulemaking record is the paper record

maintained at the address in the ADDRESSES section of this document.

The information presented in this preamble is organized as follows:

I. List of Source Categories

II. A Summary of Considerations Made in Developing This Rule.

III. Authority for National Emission Standards for Hazardous Air

Pollutants Decision Process

A. Source of Authority for NESHAP Development

B. Criteria for Development of NESHAP

IV. Summary of Proposed Standards

A. Source Categories to be Regulated

B. Pollutants to be Regulated

C. Affected Emission Points

D. Format of the Standards

E. Proposed Standards

F. Reporting and Recordkeeping Requirements

V. Request for Comment on Specific Issues

VI. Summary of Environmental, Energy, Cost, and Economic Impacts

A. Facilities Affected by These NESHAP

B. Primary Air Impacts

C. Other Environmental Impacts

D. Energy Impacts

E. Cost Impacts

F. Economic Impacts

VII. Administrative Requirements

A. Public Hearing

B. Docket

C. Executive Order 12866

D. Enhancing the Intergovernmental Partnership Under Executive

Order 12875

E. Paperwork Reduction Act

F. Regulatory Flexibility Act

G. Unfunded Mandates Reform Act

H. Miscellaneous

I. List of Source Categories

Section 112 of the CAAA requires that the EPA evaluate and control

emissions of HAP. The control of HAP is achieved through promulgation

of emission standards under sections 112(d) and 112(f) and work

practice and equipment standards under section 112(h) for categories of

sources that emit HAP. On July 16, 1992, the EPA published an initial

list of major and area source categories to be regulated, as required

under section 112(c) of the CAAA. Included on that list were major

sources emitting HAP from the production of flexible polyurethane foam.

The EPA chose to subcategorize the flexible polyurethane foam

source category into molded flexible polyurethane foam production,

slabstock flexible polyurethane foam production, and rebond foam

production. Subcategorization was necessary to reflect major variations

in production methods, and/or HAP emissions that affect the

applicability of controls. All technical analyses were conducted on a

subcategory basis to determine the appropriate level of the standard.

In addition, on June 4, 1996 the EPA added to the source category list

a separate source category for flexible polyurethane foam fabrication

(61 FR 28197). These operations are occasionally co-located with

slabstock foam production facilities, but occur other places as well. A

future standard will address flexible polyurethane foam fabrication

operations.

The EPA identified 78 facilities in the U.S. that produce slabstock

foam. It is believed that this represents the entire slabstock foam

industry. The identification of the U.S. molded foam facility

population has been more difficult to estimate. This difficulty is due

to the many small companies serving specialty markets, the production

of molded foam at facilities that also produce other molded plastic

products, and the lack of a trade association for molded foam. The EPA

identified 46 molded foam facilities in the information gathering phase

of the project, but industry estimates that there may be several

hundred molded foam facilities nationwide. The nationwide molded foam

facility population was estimated to be 228, based primarily on

information found in suppliers guides. In this notice the EPA is

requesting comments on this molded foam facility population estimate.

If commenters dispute this estimate, the EPA would request supporting

documentation for such an assertion, along with a list of molded foam

facility names and locations.

The EPA identified 21 rebond foam production facilities that are

co-located with slabstock or molded foam production facilities. It is

estimated that this represents about one-half of the total U.S. rebond

foam facility population.

This proposed rule would apply to all major sources that produce

flexible polyurethane foam. Area sources would not be subject to this

proposed rule. All of the slabstock foam facilities considered in the

analysis supporting the proposed rule are believed to be major sources

according to the CAAA criterion of having the potential to emit 10 tons

per year of any one HAP or 25 tons per year of any combination of HAP.

In this proposed rule, an affected source includes all flexible

polyurethane foam and rebond processes located at a contiguous plant

site, where a process consists of raw material storage; production

equipment and piping, ductwork, and other associated equipment; and

curing and storage areas.

II. A Summary of Considerations Made in Developing This Rule

The Clean Air Act was created in part ``to protect and enhance the

quality of the Nation's air resources so as to promote the public

health and welfare and the productive capacity of its population''

(CAAA, section 101(b)(1)). Section 112(d) of the Act establishes a

control technology-based program to reduce stationary source emissions

of HAP. The goal of the proposed rule is to apply such control

technology to reduce emissions and thereby reduce the impacts of HAP

emitted from stationary sources.

Available emission data, collected during the development of these

proposed National Emission Standards for Hazardous Air Pollutants

(NESHAP), show that the greatest volume of HAP emitted during the

production of flexible polyurethane foam is the emission of methylene

chloride. The proposed emission limits are projected to reduce

methylene chloride emissions by 70 percent. Following is a summary of

the potential health effects associated with exposure to methylene

chloride that would be reduced by the standard.

The acute (short-term) effects of methylene chloride inhalation in

humans consist mainly of nervous system symptoms such as decreased

visual and auditory functions. These effects are reversible once

exposure ceases. Short-term exposure to high concentrations of

methylene chloride also irritates the nose and throat. The effects of

chronic (long-term) exposure to methylene chloride involve the central

nervous system, and include headaches, dizziness, nausea, and memory

loss. Animal studies indicate

[[Page 68408]]

that inhalation of methylene chloride affects the liver, kidney, and

cardiovascular system. Developmental or reproductive effects of

methylene chloride have not been reported in humans, but limited animal

studies have reported lowered fetal body weights in rats exposed to

inhalation.

Human data are considered inadequate to prove cancer caused by

exposure to methylene chloride; animal studies have shown increases in

liver and lung cancer and benign mammary gland tumors following the

inhalation of methylene chloride. Methylene chloride is classified as

Group B2, probable human carcinogen of relatively low carcinogenic

potency.

As noted earlier, there are other HAP emitted by flexible

polyurethane foam production facilities. While the magnitude of

emissions of these pollutants is dwarfed by those of methylene

chloride, it is important to note that the EPA has not undertaken a

risk assessment of these facilities. Therefore, it is possible that

other HAP, such as diisocyanates, may also pose risks of concern. The

seriousness of risks remaining after imposition of the final MACT

standards will be examined at a later date, as provided for under

Section 112(f) of the Clean Air Act.

The Clean Air Act strategy avoids dependence on a detailed and

comprehensive risk assessment hampered by (but not limited to) the

following caveats, as a pre-requisite for controlling air toxics: (1)

some of the HAP emitted from stationary sources are unknown, and (2)

the EPA has incomplete data about the emissions of many of the HAP with

which to describe health hazards. In addition, this is not a

``significant'' rule as defined by Executive Order 12866, and a

specific benefits analysis is not required. Because of these issues, a

detailed and intensive risk assessment of potential effects from HAP

emitted from flexible foam plants is not included in this rulemaking.

The EPA does recognize that the degree of adverse effects to health

resulting from the most significant emissions identified can range from

mild to severe. The extent to which the effects could be experienced is

dependent upon the ambient concentrations and exposure time. The latter

is further influenced by source-specific characteristics, such as

emission rates and local meteorological conditions. Human variability

factors also influence the degree to which effects to health occur:

genetics, age, pre-existing health conditions, and lifestyle.

The alternatives considered in the development of this regulation,

including those alternatives selected as standards for new and existing

sources, are based on process and emissions data received from the

flexible polyurethane foam industry. This included information from

every existing flexible polyurethane slabstock foam facility known to

be in operation at the time of the initial data collection, and the

information gathered from the 46 molded foam facilities (which was

assumed to be representative of the entire molded foam industry). The

EPA met with industry several times to discuss this data. In addition,

facilities and State regulatory authorities had the opportunity to

comment on draft versions of the regulation and to provide addition

information. Several facilities did provide comments; of major concern

to industry were the auxiliary blowing agent (ABA) emission limitation,

and the reporting and recordkeeping requirements. The proposed

standards reflect these comments.

The proposed standards give existing facilities 3 years from the

date of promulgation to comply. This is the maximum amount of time

allowed under the Clean Air Act. New sources are required to comply

with the standard upon startup. The EPA sees no reason why new

facilities would not be able to comply with the requirements of the

standards upon startup. For existing sources, the EPA believes that the

required retrofit or other actions can be achieved in the time frame

allotted.

Included in the proposed rule are methods for determining initial

compliance as well as monitoring, recordkeeping, and reporting

requirements. All of these components are necessary to ensure that

sources will comply with the standards both initially and over time.

However, the EPA has made every effort to simplify the requirements in

the rule.

As described in the Basis and Purpose document, regulatory

alternatives were considered that included a combination of

requirements equal to, and above, the maximum achievable control

technology (MACT) ``floor.'' Cost-effectiveness was a factor considered

in evaluating options above the MACT floor; in cases where options more

stringent than the floor were selected, they were judged to have a

reasonable cost effectiveness Non-air environmental and health factors,

as well as energy impacts were also considered and deemed to be

reasonable for the proposed standards.

Representative from other interested EPA offices and programs, as

well as representative from State regulatory agencies, are included in

the regulatory development process as members of the Work Group. The

Work Group is involved in the regulatory development process, and must

review and concur with the regulation before proposal and promulgation.

Therefore, the EPA believes that the implication to other statutory

authorities and programs have been adequately considered during the

development of these standards.

In addition to this proposed standards, two of the HAP use and

emitted by the flexible polyurethane foam industry (toluene

diisocyanate and propylene oxide) are subject to the risk management

program rule requirements under section 112(r) of the CAAA. The risk

management rule was signed May 24, 1996, and the rule was published in

the Federal Register on June 20, 1996. Facilities handling a listed

subject in quantities greater than threshold amount must comply with

the risk management requirements by June 20, 1999. The list of

substances and threshold quantities were published in the Federal

Register on January 31, 1994.

III. Authority for National Emission Standards for Hazardous Air

Pollutants Decision Process

A. Source of Authority for NESHAP Development

Section 112 of the CAAA gives the EPA the authority to establish

national standards to reduce air emissions from sources that emit one

or more HAP. Section 112(b) contains a list of HAP to be regulated by

NESHAP. Section 112(c) directs the EPA to use this pollutant list to

develop and publish a list of source categories for which NESHAP will

be developed. The EPA must list source categories and subcategories of

``major sources'' (defined below) that emit one or more of the listed

HAP. A major source is defined in section 112(a) as any stationary

source or group of stationary sources located within a contiguous area

and under common control that emits or has the potential to emit in the

aggregate, considering controls, 10 tons per year or more of any one

HAP or 25 tons per year or more of any combination of HAP. This initial

list of source categories was published in the Federal Register on July

26, 1992 (57 FR 31576) and include flexible polyurethane foam.

The proposed rule, as noted in Sec. 63.1290(a), applies only to

major sources (sources which emit or have the potential to emit HAP in

excess of the major source thresholds). The rule does not affect area

sources (those that do not emit or have the potential to emit HAP

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in excess of the major source thresholds). A definition of ``major

source'' and ``potential to emit'' is contained in Sec. 63.2 of the

general provisions to part 63. Some sources which would otherwise have

a potential to emit HAP in excess of the major source thresholds can

become area sources by accepting enforceable limitations on their

operations. A number of issues exist with respect to the requirements

for such enforceable limitations. These issues (particularly whether

such limitations must be federally enforceable) will be subject to a

separate upcoming rulemaking. In this separate rulemaking, the EPA will

be amending the definitions of ``major source'' and ``potential to

emit'' in Sec. 63.2. The EPA requests that any comments on requirements

for potential to emit limitations be directed towards this separate

rulemaking.

For those facilities that may seek enforceable limitations on their

potential to emit, the EPA believes that mechanisms are in place in

most States to provide such limitations. In addition, the owners or

operators of sources in the flexible polyurethane foam industry will

have had to address whether the title V operating permits program

affects their particular facilities well before the compliance date of

the NESHAP. Title V applications vary from State to State, but

generally will be due within the 1995-97 time frame. The compliance

date for the proposed NESHAP would be in 3 years after promulgation of

the standard, which will likely be sometime in the year 2000.

The proposed rule provides a mechanism that could be used by

sources seeking area sources status to limit their emissions. The

mechanism requires owners or operations to notify the Administrator of

their commitment to maintaining emissions below major source levels.

This notification would be included in the Precompliance Report, and

would include recordkeeping and reporting procedures. The EPA requests

comments on whether this provision, contained in Sec. 63.1290(c)(1) of

the proposed rule, is necessary. In addition, the EPA requests comments

on any amendments to the provision that would make it more useful or

understandable.

B. Criteria for Development of NESHAP

The NESHAP are to be developed to control HAP emissions from both

new and existing sources according to the statutory directives set out

in section 112(d) of the CAAA. The statute requires the standards to

reflect the maximum degree of reduction in emissions of HAP that is

achievable for new or existing sources, considering costs and other

impacts. This control level is referred to as MACT.

The MACT floor is the least stringent level allowed for MACT

standards. For new sources, the standards for a source category or

subcategory ``shall not be less stringent than the emission control

that is achieved in practice by the best controlled similar source, as

determined by the Administrator'' (section 112(d)(3)). Existing source

standards shall be no less stringent than the average emission

limitation achieved by the best performing 12 percent of the existing

sources for categories and subcategories with 30 or more sources or the

average emission limitation achieved by the best performing 5 sources

for categories or subcategories with fewer than 30 sources (section

112(d)(3)). These two minimum levels of control define the MACT floor

for new and existing sources. When the selection of MACT considers

control levels more stringent than the MACT floor (described below),

its selection must reflect consideration of the cost of achieving the

emission reduction, any non-air quality, health, and environmental

impacts, and energy requirements.

IV. Summary of Proposed Standards

This section provides a summary of the proposed regulation. The

full regulatory text is available in Docket No. A-95-48, directly from

the EPA, or from the Technology Transfer Network (TTN) on the EPA's

electronic bulletin boards. More information on how to obtain a copy of

the proposed regulation is provided at the beginning of the

SUPPLEMENTARY INFORMATION section of this document.

A. Source Categories To Be Regulated

These proposed standards would regulate HAP emissions from

facilities that produce slabstock, molded, or rebond flexible

polyurethane foam, provided that a facility is a major source or is

located at a plant site that is a major source. Flexible polyurethane

foam processes meeting one of three criteria are exempted from the

regulation: (1) A process located at a plant site, where the plant site

is limited by a federally enforceable limit to emissions less than 10

tons per year of any single HAP and less than 25 tons per year of all

HAP; (2) a process exclusively dedicated to the fabrication of flexible

polyurethane foam; and (3) a research and development process.

B. Pollutants To Be Regulated

The HAP currently emitted by the facilities covered by this

proposed rule include methylene chloride, toluene diisocyanate, methyl

chloroform, methylene diphenyl diisocyanate, propylene oxide,

diethanolamine, methyl ethyl ketone, methanol, and toluene. Emission of

any of these HAP or any other HAP that are emitted from emission points

discussed in the next section will be affected. Methylene chloride,

which comprises over 98 percent of the total HAP emissions from this

industry, will be the primary HAP affected.

C. Affected Emission Points

As noted above, three basic areas of the foam production facility

are covered by the proposed regulation: (1) raw material storage; (2)

production equipment and associated piping, ductwork, etc.; and (3)

curing and storage areas. These areas contain the following emission

points, which are covered by the proposed regulation: storage vessels,

equipment leaks, mixhead flush, mold release agents, repair adhesives,

equipment cleaning, and ABA.

D. Format of the Standards

This section discusses the selected formats for the proposed

standards. The formats and their selection are discussed in more detail

in the Basis and Purpose Document for this proposed regulation.

For mixhead flush, mold release agents, and repair adhesives at

molded foam facilities; mold release agents and equipment cleaners at

rebond foam facilities; and equipment cleaning at slabstock foam

facilities, the format of the proposed standards is the prohibition of

the use of HAP or HAP-based products.

For storage vessels at slabstock facilities, the format is an

equipment standard. For equipment leaks at slabstock facilities, the

proposed standards incorporate several formats including equipment

standards, design standards, work practices, and operational practices.

For HAP ABA at slabstock facilities, the format of the proposed

standards is an emission limitation. The proposed regulation includes

provisions for the calculation of an allowable HAP ABA emissions level,

which is compared to the actual HAP ABA emissions.

E. Proposed Standards

Existing sources subject to the proposed regulation would be

required to comply within three years of the effective date of the

regulations, and

[[Page 68410]]

new sources would be required to comply at startup. Following is a

description of the requirements of the proposed standards.

1. Standards for Molded Flexible Polyurethane Foam Production

At molded foam facilities subject to the proposed rule, emissions

from three emission sources are covered by the proposed rule: mixhead

flushing, mold release agent usage, and the use of adhesives to repair

molded foam. For each of these emission sources, the proposed rule

prohibits the use of HAP or HAP-based products at new and existing

sources. Other than the initial notification and notification of

compliance, there are no associated monitoring, reporting, or

recordkeeping requirements for molded foam producers.

2. Standards for Rebond Foam Production

This proposed regulation would prohibit the use of HAP-based

cleaners or mold release agents in the production of rebond foam at new

and existing sources. Other than the initial notification and

notification of compliance, there are no associated monitoring,

reporting, or recordkeeping requirements for rebond foam producers.

3. Standards for Slabstock Flexible Polyurethane Foam Production

At slabstock foam facilities subject to the proposed rule,

emissions from four types of emission points are covered by the

proposed rule: storage vessels, equipment leaks, HAP auxiliary blowing

agent (ABA) use, and equipment cleaning. The requirements are separated

into two basic categories corresponding to the two major uses of HAP in

the slabstock process: (1) diisocyanate used as a reactant in the foam

process, and (2) HAP ABA and equipment cleaning. The diisocyanate used

in the production of slabstock foam is almost always toluene

diisocyanate (TDI), and the HAP ABA used is almost always methylene

chloride.

a. Diisocyanate emissions

Emissions of diisocyanate from storage vessels and equipment leaks

are covered by the proposed standards. For new and existing sources,

there are two compliance options for storage vessels. The vessel can be

equipped with a vapor return line that returns vapors displaced during

storage vessel filling to the tank truck or rail car. The second option

is to equip the storage vessel with a system in which displaced vapors

are routed through a carbon adsorption system prior to being discharged

to the atmosphere. Storage vessels equipped with carbon adsorption

systems must monitor the outlet of the carbon system to detect

breakthrough.

Transfer pumps in diisocyanate service must be either sealless

pumps, or submerged pump systems that are visually monitored weekly to

detect leaks. Any transfer pump leaks detected must be repaired within

15 calendar days. Diisocyanate leaks for other components in

diisocyanate service (valves, connectors, and pressure-relief valves)

detected by visual, audible, or any other detection method must be

repaired within 15 calendar days, as well.

b. HAP ABA storage and equipment leak emissions, HAP ABA emissions from

the production line, and equipment cleaning HAP emissions

HAP ABA emissions from three types of emission points--storage

vessels, equipment leaks, and the production line--are covered by the

proposed regulation. In addition, HAP emissions from equipment cleaning

are covered.

This proposed regulation requires that owners or operators comply

with requirements for each of the four types of emission points (HAP

ABA emissions from storage vessels, equipment leaks, and the production

line, and HAP emissions from equipment cleaning). These limitations are

described below.

However, since methylene chloride is the primary HAP used as an ABA

and as an equipment cleaner, this proposed rule allows owners and

operators flexibility in complying with the HAP ABA and equipment

cleaning provisions. As an alternative to the emission point specific

limitations, the owner or operator can elect to comply with a source-

wide emission limitation. Owners or operators selecting the source-wide

emission limitation must maintain the combined emissions from all of

these sources below the required level. While this option is slightly

more stringent than the emission point specific limitations, the EPA

believes the flexibility it provides will prove to be beneficial for

sources selecting this alternative.

HAP ABA storage vessel requirements. The requirements for HAP ABA

storage vessels are identical to the diisocyanate storage vessel

requirements discussed above. Storage vessels can be equipped with

either a vapor return line to the tank truck or railcar, or a carbon

adsorption system. The requirements for new and existing sources are

identical.

HAP ABA equipment leaks. These proposed standards contain

requirements for pumps, valves, connectors, pressure-relief devices,

and open-ended valves or lines in HAP ABA service at new and existing

sources.

Pumps and valves must be monitored quarterly for leaks using Method

21, 40 CFR part 60, appendix A, where a leak is defined as an

instrument reading of 10,000 parts per million or greater. Leaks must

be repaired within 15 calendar days after their detection.

Alternatively, leakless pumps can be used. Valves that are designated

as unsafe-to-monitor must be monitored as frequently as possible, and

difficult-to-monitor valves must be monitored once per year.

Connectors must be monitored annually, unless the connector has

been opened or the seal broken. In these cases, the connector must be

monitored within 3 months after being returned to HAP ABA service. As

with the other components, a leak is defined as an instrument reading

of 10,000 parts per million or greater, and a leak must be repaired

within 15 calendar days. Connectors can also be designated as unsafe-

to-monitor, in which case they must be monitored as frequently as

possible.

Pressure-relief devices must be monitored using Method 21 if

evidence of a potential leak is found by visual, audible, olfactory, or

any other detection method. If a leak is found (10,000 parts per

million), it must be repaired within 15 calendar days.

Each open-ended valve or line in HAP ABA service must be equipped

with a cap, blind flange, plug, or a second valve.

HAP ABA Emissions from the production line. Compliance with the

proposed provisions for HAP ABA emissions from the production line is

determined by comparing actual HAP ABA emissions to an allowable

emission level for a 12-month period. Compliance must be determined

each month for the previous consecutive 12-month period.

This proposed regulation recognizes the variability in HAP ABA

emissions for different grades of foam, where a grade of foam is

determined by its density and indentation force deflection (IFD).

Therefore, the allowable emission level is dependent on the mix of foam

grades produced during the 12-month compliance period. The nucleus of

the HAP ABA emission limitation provisions is the HAP ABA formulation

limitation equation, which determines an allowable amount of HAP ABA

for each grade of foam. For existing sources, this equation is:

[[Page 68411]]

[GRAPHIC] [TIFF OMITTED] TP27DE96.001

Where,

ABAlimit = HAP ABA formulation limitation, parts HAP ABA

allowed per hundred parts polyol (pph)

IFD = Indentation force deflection (25 percent), pounds

DEN = Density, pounds per cubic foot

Therefore, for each foam grade produced during the 12-month period, the

owner or operator must determine the HAP ABA formulation limitation.

This equation was developed using actual formulation data from the best

performing foam production facilities. The development of this equation

is discussed in docket item no. II-B-6.

For new sources, the equation is used to determine the HAP ABA

formulation limitation for a limited number of grades. However, the

formulation limitation for many higher-density, higher-IFD foams is

automatically set to zero.

The allowable HPA ABA emissions for a consecutive 12-month period

are calculated as the sum of allowable monthly HAP ABA emissions for

each of the individual 12 months in the period. Allowable HAP ABA

emissions for each individual month are calculated using the following

equation.

[GRAPHIC] [TIFF OMITTED] TP27DE96.002

Where,

emisallow, month= Allowable HAP ABA emissions from the

slabstock affected source for the month, pounds

m = number of slabstock foam production lines at the affected source

n = Number of foam grades produced in the month on foam production

line j

limiti = HAP ABA formulation limit for foam grade i, parts HAP

ABA per 100 parts polyol

polyoli = Amount of polyol used in the month in the production

of foam grade i on foam production line j, pounds

The amount of polyol used is a key component of this analysis, and

it must be determined by continuously monitoring the amount of polyol

added to the slabstock foam production line at the mixhead when foam is

being poured (see section IV(E)(4)(b) below for more information).

Actual HAP ABA emissions are determined by continuously monitoring

the HAP ABA added to the slabstock foam production line at the mixhead

when foam is being poured. The allowable monitoring methods for HPA ABA

are the same as for polyol.

This proposed regulation also contains provisions to allow for the

use of HAP ABA recovery devises. If a recovery device is used, the

actual HAP emissions are the difference between the uncontrolled HAP

ABA emissions and the HAP ABA recovered. The uncontrolled HAP ABA

emissions are determined by monitoring the HAP ABA added to the

slabstock foam production line at the mixhead, as discussed above. The

amount of HAP ABA recovered is required to be monitored.

As an alternative to the rolling annual compliance approach, owners

or operators can elect to comply each month. If this approach is

selected, actual and allowable emissions are determined as discussed

above. However, compliance is determined by comparing allowable and

actual emissions for each month, rather than for the 12 previous

months. An advantage of the monthly compliance approach is that a

violation of the allowable monthly HAP limitation constitutes up to 30

days of violation for that compliance period, whereas a violation of

the allowable annual total of HAP calculated in any given month

constitutes up to 365 days of violation for that compliance period.

This alternative is allowed because it is more stringent than the

rolling annual compliance approach.

Equipment cleaning HAP emissions. Affected sources complying with

the emission point specific limitations are prohibited from using a

HAP, or a HAP-based product, as an equipment cleaner. Other than the

initial notification, there are no associated reporting, recordkeeping,

or monitoring requirements.

Source-wide emission limitation alternative. This alternative

allows the owner or operator to choose which of the HAP ABA emission

sources to control but is only available for sources using no more than

one HAP as an ABA and equipment cleaner in the process. In other words,

an owner or operator could choose not to control HAP ABA storage

vessels and equipment leaks, and achieve a slightly higher HAP ABA

emission reduction from the production line. Alternatively, an owner or

operator could choose to control emissions from equipment leaks and

storage to ``save'' as much HAP ABA as possible for use in the

production line. In addition, under the source-wide alternative, a

facility could utilize a HAP equipment cleaner, as long as the HAP used

as the equipment cleaner is the same chemical as the HAP ABA. However,

the equipment cleaning HAP emissions must be offset by emission

reductions from one of the HAP ABA emission sources.

An owner or operator electing to comply with the source-wide

emission limitation for HAP ABA and equipment cleaning determines

compliance by comparing actual emissions from the three HAP ABA

emission sources and from equipment cleaning with an allowable

emissions level. Compliance is determined each month for the previous

12-month period.

The allowable emissions level is determined using the same

procedures discussed above for HAP ABA emissions from the production

line. Therefore, the total HAP ABA and equipment cleaning HAP emissions

allowed under this alternative are equivalent to the allowed HAP ABA

emissions from the production line if the emission point specific

alternative is selected.

The actual HAP ABA and equipment cleaning emissions are determined

by performing a material balance at the HAP ABA storage vessel, using

the following equation:

[GRAPHIC] [TIFF OMITTED] TP27DE96.003

Where,

PWEactual = Actual source-wide HAP ABA and equipment cleaning

HAP emissions for a month, pounds/month

STi,begin = Amount of HAP ABA in storage tank i at the

beginning of the month, pounds

STi,end = Amount of HAP ABA in storage tank i at the end of the

month, pounds,

[[Page 68412]]

ADDi = Amount of HAP ABA added to storage tank i during the

month, pounds

n = Number of HAP ABA storage vessels

Weekly monitoring of the level of HAP ABA in the storage vessels is

required, thus providing the beginning and end of month amounts to be

used in the above equation. In addition, the amount of each HAP ABA

delivery must be determined. The requirements for the monitoring of HAP

ABA storage vessel levels and the amount of HAP ABA added during each

delivery is discussed later in this section. Emission reductions

achieved by recovery devices can be accounted for by monitoring the

amount of HAP ABA recovered.

As with the emission point specific limitation for HAP ABA from the

production line, the source-wide emission limitation includes a monthly

compliance alternative.

4. Monitoring Requirements

This proposed regulation contains monitoring requirements for five

situations: (1) storage vessels complying using carbon adsorption

systems, (2) polyol and HAP ABA added to the production line at the

mixhead, (3) recovered HAP ABA when a recovery device is used, (4) the

amount of HAP ABA in a storage vessel, and (5) the amount of HAP ABA

added to a storage vessel.

a. Storage Vessel Emissions Monitoring

Storage vessels equipped with carbon adsorption systems must

monitor either the concentration of HAP or the concentration of total

organic compounds (TOC) at the exit of the adsorption system.

Measurements of HAP or TOC concentration must be made using Method 18

or 25A of Appendix A of 40 CFR 60. Outlet concentration measurements

must be made monthly (or each time the vessel is filled, if filling

occurs less frequently than monthly), or the owner or operator can

install a monitoring system that continuously monitors HAP or TOC

concentrations during vessel filling.

b. Polyol and HAP ABA Monitoring at the mixhead

All slabstock facilities must continuously monitor the amount of

polyol added to the slabstock foam production line at the mixhead when

foam is being poured to allow the calculation of allowable emissions.

The regulation contains two options for continuously monitoring the

polyol added: (1) a device installed and operated to monitor and record

pump revolutions per minute, or (2) a flow rate monitoring device

installed and operated to measure the amount of polyol added at the

mixhead. Either of these devices must be calibrated at least once each

6 months, and must have an accuracy to within 2 percent.

The owner or operator can develop an alternative monitoring program to

monitor the amount of polyol added at the mixhead. The components of an

alternative monitoring plan shall include, at a minimum, (1)

description of the parameter to be monitored to measure the amount of

HAP ABA or polyol added at the mixhead; (2) a description of how the

monitoring results will be recorded, and how the results will be

converted into amount of HAP ABA or polyol delivered to the mixhead;

(3) data demonstrating that the monitoring device is accurate to within

2.0 percent; and (4) procedures to ensure that the

accuracy of the parameter monitoring results is maintained. These

procedures shall, at a minimum, consist of periodic calibration of all

monitoring devices. In addition, if an owner or operator elects to

comply with the emission point specific limitations, the amount of HAP

ABA added to the slabstock foam production line at the mixhead must be

continuously monitored when foam is being poured. The requirements for

monitoring the amount of HAP ABA added are exactly the same as

discussed above for polyol, except that the device must be calibrated

at least once per month.

c. Recovered HAP ABA Monitoring

The proposed rule also includes monitoring requirements for

slabstock facilities using a recovery device to reduce HAP ABA

emissions. The amount of HAP ABA recovered is determined by using a

device that monitors the cumulative amount of HAP ABA recovered by the

recovery device. This device must be installed, calibrated, maintained,

and operated according to the manufacturer's specifications, and must

be certified by the manufacturer to be accurate to within

2.0 percent.

d. Monitoring to Determine Amount of HAP ABA in a Storage Vessel

The amount of HAP ABA in a storage vessel must be determined by

monitoring the HAP ABA level in the storage vessel using a monitoring

device that has been certified by its manufacturer to be at least 99

percent accurate, that has either a digital or printed output, and that

is calibrated at least once a year. The level of HAP ABA in each

storage vessel must be measured and recorded at least once per week.

e. Monitoring to Determine the Amount of HAP ABA Added to a Storage

Vessel

The amount of HAP ABA added to a storage vessel during a delivery

must be determined using any one of three options. The first option

requires that the volume of HAP ABA added to the storage vessel be

determined by monitoring the flow rate using a device with an accuracy

of 98 percent or greater, and which Is calibrated at least once every

six months. The second options allows the owner or operator to

calculate the weight of HAP ABA added by determining the difference

between the full weight of the transfer vehicle prior to unloading into

the storage vessel and the empty weight of the transfer vehicle after

unloading has been completed. This weight must be determined using a

scale approved by the State or local agencies using the procedures

contained in the National Institute of Standards and Technology

Handbook 44, or a scale determined to be in compliance with the

requirements of the National Institute of Standards and Technology

Handbook 44 at least once per year by a registered scale technician.

The third option for determining the amount of HAP ABA added to a

storage vessel allows the owner or operator to develop an alternative

monitoring program. The alternative monitoring program must include, at

a minimum, a description of the parameter to be monitored to determine

the amount of the addition, a description of how the results of the

monitoring will be recorded and converted into the amount of HAP ABA

added, data demonstrating the accuracy of the monitoring measurements,

and procedures for ensuring that the accuracy of the monitoring

measurements is maintained.

5. Testing Requirements

There are two instances where the use of test methods is required.

First, for slabstock owners or operators complying with the emission

point specific requirements for HAP ABA equipment leaks, testing must

be conducted using Method 21 of 40 CFR part 60, subpart A.

Second, all slabstock affected sources must test each grade of foam

produced during a single production ``run'' to verify the IFD and

density, as these are integral inputs into the equation to determine

the HAP ABA formulation limitation. This proposed rule requires these

parameters to be determined using ASTM D3574 using a sample of foam cut

from the center of the foam bun. The maximum sample size for which the

IFD and density is determined shall not be

[[Page 68413]]

larger than 24 inches by 24 inches by 4 inches.

6. Alternative Means of Emission Limitation

This proposed regulation also contains provisions to allow an owner

or operator to request approval to use an alternative means of emission

limitation. Examples of alternative means of emission limitation could

be the reduction of HAP ABA by a combustive device, use of a storage

tank control not mentioned in the regulation, or an alternative program

to reduce HAP ABA equipment leak emissions. The request, which may be

submitted in the precompliance report for existing sources, the

application for construction or reconstruction for new sources, or at

any other time after the initial compliance, must include a complete

description of the alternative means of emission limitation and

documentation demonstrating equivalency with the requirements in the

regulation. The owner or operator can begin using the alternative means

of emission limitation upon approval of the request by the

Administrator.

7. Applicability of General Provisions

The General Provisions for Part 63; 40 CFR 63, Sub Part A; create

the technical and administrative framework for implementing national

emission standards established under section 112 of the Clean Air Act.

The General Provisions establish baseline applicable requirements for

activities such as performance testing, monitoring, notifications, and

recordkeeping and reporting, and they also implement statutory

provisions such as compliance dates for new and existing sources and

preconstruction review requirements. The General Provisions apply to

all sources that are affected by Part 63 standards, including the

proposed standard for flexible polyurethane foam production. However,

certain requirements in the General Provisions may be overridden in

individual standards. This proposed regulation contains a table

outlining the sections of the General Provisions that are applicable to

subpart III, and outlining the General Provisions' sections that are

being overridden or not incorporated.

F. Reporting and Recordkeeping Requirements

1. Reporting Requirements

This proposed regulation requires the submittal of six types of

reports: (1) initial notification, (2) application for approval of

construction or reconstruction, (3) precompliance report, (4)

notification of compliance status, (5) semi-annual compliance reports,

and (6) other reports. These reports are briefly described below.

a. Initial Notification

Each owner or operator of an affected source must submit an initial

notification to the Administrator within 120 days after promulgation of

the rule. This initial notification must contain an identification of

the facility that is subject to the regulation, the name and address of

the owner or operator of the subject facility, and a brief description

of the process.

b. Application for Approval of Construction or Reconstruction

Owners or operators constructing a new affected source, or

reconstructing an existing process, must submit an application for

approval of construction or reconstruction. This application must

contain identification information such as location, owner/operator,

and the anticipated completion and start-up dates. The application must

also contain a description of the planned process and how compliance

will be achieved. The application must be submitted as soon as

practicable before the construction or reconstruction is planned to

commence. A permit application can take the place of this report.

c. Precompliance Report

One year before the compliance date, each slabstock owner or

operator must submit a precompliance report. This report must contain

notification of whether compliance will be achieved using the emission

point specific HAP ABA and equipment cleaning emission limitation or

the source-wide emission limitation. The report must also indicate if

either of the following compliance options are going to be utilized:

If compliance will be achieved on a monthly basis for

either the emission point specific limitation for HAP ABA emissions

from the production line or the source-wide emission limitation.

If a recovery device will be used to reduce HAP ABA

emissions.

This report must also contain a description of how the amount of

polyol and HAP ABA (if required) added at the mixhead will be

monitored. If the owner or operator is developing an alternative

monitoring plan, the plan must be submitted with the precompliance

report. In addition, owners or operators of slabstock flexible

polyurethane production facilities using a recovery device to reduce

HAP ABA emission must include a description of the HAP ABA monitoring

and recordkeeping program to determine the amount of HAP ABA recovered

in the precompliance report.

Each owner or operator of a source complying with the source-wide

emission limitation must submit a description of how the amount of HAP

ABA in a storage vessel will be determined, and a description of how

the amount of HAP ABA added to a storage vessel during a delivery will

be monitored. If the owner or operator is developing an alternative

monitoring program for the determination of HAP ABA added to a storage

vessel, this program must be submitted with the precompliance report.

The owner or operator of a flexible polyurethane foam production

facility that is planning to maintain HAP emissions below major source

levels and achieve an enforceable limitation through this subpart, must

report this intention in the precompliance report.

d. Notification of Compliance Status

Each owner or operator of an affected source must submit a

notification of compliance status report 180 days after the compliance

date. For slabstock affected sources, this report must contain

notification of the compliance status of diisocyanate storage vessels

and dissocyanate transfer pumps. In addition, for slabstock affected

sources complying with the emission point specific limitations for HAP

ABA, this report must contain compliance information for HAP ABA

storage vessels and equipment in HAP ABA service. Molded and rebound

affected sources must submit a statement that compliance is being

achieved with the standards.

An owner or operator of a flexible polyurethane foam production

facility that is committing to an enforceable limit to maintain

emissions below major source levels must submit an affidavit stating

the annual HAP emissions will not exceed the major source levels in the

notification of compliance status. This affidavit must be signed by the

owner, operator, or other responsible individual.

e. Semi-annual Compliance Reports

Each slabstock owner or operator must submit semi-annual compliance

reports. For affected sources complying with the rolling annual

compliance provisions (for either the emission point specific HAP ABA

limitations or the source-wide emission limitation), the report must

contain the allowable and actual HAP ABA emissions (or allowable and

actual HAP ABA and equipment cleaning HAP emissions) for each of the

12-month periods ending on each of the six months in the reporting

[[Page 68414]]

period. For affected sources complying with the monthly compliance

alternative, the report must contain the allowable and actual HAP ABA

emissions (or allowable and actual HAP ABA and equipment cleaning HAP

emissions) for each for the six months in the reporting period.

f. Other Reports

A slapstock owner or operator must provide a report to the

Administrator indicating the intent to change the selected compliance

alternative (emission point specific limitation or source-wide emission

limitation). This report must be submitted at least 180 days prior to

the change.

Similarly, the intent to switch the compliance method (rolling

annual or monthly) must be reported. This report must be submitted at

least 12 months prior to the change.

2. Recordkeeping Requirements

Records must be recorded in a form suitable and readily available

for expeditious inspection and review, and must be kept for a period of

5 years. At a minimum, the most recent 2 years of data must be retained

on-site.

Records are required for storage vessels, equipment leaks, and HAP

ABA. If the owner of operator complies with the source-wide emission

limitation, no records are required for HAP ABA storage vessel controls

(see section ``a'' below) or controls for equipment in HAP ABA service

(see section ``b'' below).

a. Storage Vessel Records

All slabstock affected sources must maintain records listing all

diisocyanate storage vessels and the type of control utilized to comply

with the regulation. For the storage vessels complying through the use

of a carbon absorption system, the records must include the design

parameters of the system and the monitoring records.

(vi) Records of all calibrations for each device used to measure

the amount of HAP ABA in the storage vessel, conducted in accordance

with Sec. 63.1303(d)(3).

(vii) Records to verify that all scales used to measure the amount

of HAP ABA added to the storage vessel meet the requirements of

Sec. 63.1303(e)(2). For scales meeting the criteria of

Sec. 63.1303(e)(2)(i), this documentation shall be in the form of

written confirmation of the State or local approval. For scales

complying with Sec. 63.1303(e)(2)(ii), this documentation shall be in

the form of a report provided by the registered scale technician.

(d) Records for sources with enforceable emission limitations below

major source levels. Processes exempted from this subpart through a

federally enforceable emission limitation in accordance with

Sec. 63.1290(b)(1), and that have notified the Administrator of this

self-imposed limitation through Sec. 63.1306(c)(9), shall maintain

records to support the emission estimates provided in the annual

emission reports, submitted in accordance with Sec. 63.1306(f)(3).

These emission estimates may be based on inventory records, material

balance calculations, emission tests, or other engineering analyses.

b. Equipment Leak Records

All slabstock affected sources must maintain a list of components

in diisocyanate service, and a description of the control utilized for

each transfer pump. If the affected source is complying with the

emission point specific limitations, then records listing each

component in HAP ABA service must also be maintained.

When a leak, as defined in the proposed rule, is detected for any

component, the component must be marked with a readily visible

identification until the leak is repaired. For valves, the

identification must remain until 2 successive months have passed where

no leak is detected. Records must be kept specifying when the leak was

detected when it was repaired, and when the identification was removed.

c. HAP ABA Records

All slabstock affected sources must keep records integral to the

calculation of allowable emissions. These include a daily log of foam

runs, and daily records of the amount of polyol added at the mixhead

for each grade of foam, and the results of the density and IFD testing

for each grade. Monthly, a cumulative record must be maintained listing

the foam grades produced during the month, along with the total amount

of polyol used for each foam grade, and the corresponding allowable HAP

ABA (or HAP ABA and equipment cleaning) emission level. If complying on

an annual rolling basis, the allowable HAP ABA (or HAP ABA and

equipment cleaning) emission level for the previous 12 consecutive

months must also be recorded each month.

For affected sources complying with the emission point specific

limitation for HAP ABA emissions from the production line, records must

be kept regarding the amount of HAP ABA added at the mixhead each day.

In addition, there must also be a cumulative HAP ABA usage record for

each month, and a cumulative record for the previous 12 consecutive

months (if complying on an annual rolling basis).

For affected sources complying with the source-wide emission

limitation, monthly records must be kept regarding the actual HAP ABA

and equipment cleaning emissions, as measured at the storage vessel.

Also required are daily records of the HAP ABA storage vessel levels

and records of the amount of HAP ABA added to the storage vessel during

each delivery. If complying on an annual rolling basis, monthly records

must be kept of the actual cumulative HAP ABA and equipment cleaning

emissions for the previous 12 months.

If an affected source uses a recovery device to reduce HAP ABA

emissions, records must be kept regarding the amount of HAP ABA

recovered. In addition, records of all required calibrations must be

maintained.

d. Records for Sources With Enforceable Emission Limitations Below

Major Source Levels

The owner or operator of a flexible polyurethane foam production

facility that is committing to an enforceable limit to maintain

emissions below major source levels must keep records documenting HAP

emissions. These records can consist of basic inventory records and

engineering calculations.

V. Request for Comment on Specific Issues

The Administrator welcomes comments from interested persons on any

aspect of this proposed standards, and on any statement in the preamble

or the referenced supporting documents. These proposed standards were

developed on the basis of information available. The Administrator is

specifically requesting factual information that may support either the

approach taken in these proposed standards or an alternate approach. To

receive proper consideration, documentation or data should be provided.

Specifically, the EPA is requesting comment and data on the following

issue.

The proposed standards for slabstock foam production contain

provisions to control emissions of TDI from storage vessels and

equipment leaks. However, the standards do not contain provisions to

control TDI emissions from the foam production line. At baseline, no

facilities in the industry reported control for these TDI emissions;

therefore, the MACT floor was determined to be ``no control.'' Further,

no control options more stringent than the MACT floor were

investigated, since

[[Page 68415]]

no demonstrated technology were identified. However, some State and

local agencies have requirements affecting sources emitting TDI in

their air toxics regulations. One State with such a regulation has

expressed concern to the EPA that this proposed regulation will not

reduce TDI emissions from foam production. Therefore, the EPA is

requesting comments on the need for additional controls for TDI from

this industry. The EPA would like to be made aware of any control

technologies that are being used, or could be used, to reduce TDI

emissions from slabstock foam production lines. Comments should be

detailed and include costs, control effectiveness, operation and

monitoring requirements, and any other relevant factors to be

considered.

For the proposed requirements for HAP ABA emissions from the

production line, and source-wide HAP ABA and equipment cleaning HAP

emissions, the EPA considered two averaging time formats: (1)

Compliance determined monthly for the previous 12 months (i.e., a

rolling annual compliance determination), and (2) compliance determined

for each individual month. The Agency determined that the rolling

annual compliance format was most appropriate for this industry, but

the industry was particularly concerned about enforcement implications

of this format. Therefore, the proposed rule allows each slabstock

facility to choose the individual monthly averaging time as an

alternative, because it is more stringent. The EPA is specifically

requesting comments from State and local agencies, as well as the

industry, on the burdens caused by the inclusion of this choice in the

proposed regulation.

The point of compliance for the proposed source-wide HAP ABA and

equipment cleaning ABA emission limitation would be the HAP ABA storage

vessel, where a monthly material balance would be performed to

determine the amount of HAP ABA and HAP equipment cleaner used/emitted.

This proposed rule requires sources complying with the source-wide

emission limitation to monitor the amount of HAP ABA in each storage

vessel at least once per week. These monitoring results are used to

determine monthly source-wide HAP ABA emissions. The device used to

determine this amount must meet three criteria: (1) It must be

certified by its manufacturer to be accurate to within +/-1 percent,

(2) it must have either a digital or printed output, and (3) it must be

calibrated at least once per year. As proposed, the rule would not

allow the use of gauge glasses and simple float systems (i.e., float

and tape), which are common practices in the industry. The concerns

that led the Agency to propose requirements that exclude the use of

these devices were the uncertainty of the accuracy of these devices,

and the potential errors associated with the visual reading of the

level of liquid in the tank. Since the use of these technologies is

wide-spread in the slabstock foam industry, the EPA would prefer that

the use of these technologies be allowed. However, questions regarding

the concerns mentioned above remain unanswered. Therefore, the EPA is

requesting comment on the proposed monitoring requirements to determine

the amount of HAP ABA in storage vessels. The EPA is also specifically

requesting comment on whether the use of gauge glasses, float and tape

systems, and other visually-read systems should be allowed under this

rule. Commenters that believe that it is appropriate to allow the use

of these systems should provide rationale and supporting documentation

regarding the accuracy of these systems, measures to ensure the

accuracy of visual readings, and calibration procedures.

The EPA estimated that there are 228 molded foam facilities in the

U.S. The EPA is requesting comments on this estimate, and any

information related to the molded foam production facility population.

This proposed regulation prohibits the use of HAP-based adhesives

for molded foam repair. The EPA is requesting comments on the technical

feasibility of these requirements.

VI. Summary of Environmental, Energy, Cost, and Economic Impacts

This section presents the air, non-air environmental (waste and

solid waste), energy, cost, and economic impacts resulting from the

control of HAP emissions under this rule.

A. Facilities Affected by These NESHAP

It is estimated that 176 sources will be subject to the proposed

regulation. This consists of 57 slabstock foam facilities, 21

facilities with slabstock and rebond processes, and 98 molded foam

facilities. It is assumed that 130 molded foam facilities are area

sources, and will not be subject to today's proposed rule. It is also

assumed that all rebond facilities not co-located with a slabstock foam

process are area sources.

B. Primary Air Impacts

These proposed standards are estimated to reduce HAP emissions from

all existing sources of flexible polyurethane foam manufacturing by

over 12,500 Mg/yr. This represents a 70 percent reduction from

baseline. This includes over 10,400 Mg/yr from slabstock foam

production (69 percent reduction from baseline) and over 2,100 Mg/yr

from molded foam production (73 percent reduction from baseline). No

reduction is expected from rebond foam production, since it is believed

that the entire industry has already stopped using HAP cleaners and

mold release agents.

C. Other Environmental Impacts

The Agency estimates that there will be minimal secondary

environmental impacts from this proposed regulation. There could be a

slight increase in volatile organic compound (VOC) air emissions if

facilities switch from a HAP-based product to a non-HAP VOC based

product for equipment cleaning, mold release agents, mixhead flushes,

and repair adhesives. Wastewater could contain minor amounts of HAP if

carbon adsorption systems are used to comply with the HAP ABA

limitations, but the Agency believes the use of such systems will be

rare. The only potential hazardous waste impact would be due to the

disposal of spent carbon adsorption canisters used to control storage

vessels.

D. Energy Impacts

Due to the use of several control technologies in both slabstock

and molded foam there will be some increase in the amount of energy

used by this source category. The impact will vary depending on which

control technology is chosen by each facility, but is not expected to

be significant.

E. Cost Impacts

Cost impacts include the capital costs of new equipment that

reduces HAP emissions, the cost of energy required to operate the

equipment, operation and maintenance costs, as well as cost savings.

Also, cost impacts include the costs of monitoring, recordkeeping, and

reporting associated with the proposed standards. Average cost

effectiveness ($/Mg of pollutant removed) is also presented as part of

cost impacts and is determined by dividing the annual cost by the

annual emission reduction.

For the molded subcategory, the estimated total capital investment

in $6.1 million, and the total estimated annual cost is almost $760,000

per year. The total annual HAP emission reduction is 2,100 Mg/year,

resulting in a cost effectiveness of $360/Mg per year.

For the rebond subcategory, it is anticipated that there will be no

cost or environmental impacts, since it is believed that every facility

already

[[Page 68416]]

complies with these provisions. The regulation will prohibit the future

use of HAP-based cleaners and mold release agents in this industry.

For the slabstock subcategory, the total estimated capital

investment is around $68 million, and the total estimated annual cost

is $7.3 million per year. The total annual HAP emission reduction is

over 10,400 Mg/yr, resulting in a cost-effectiveness of around $700/Mg

per year.

Therefore, the total capital investment for this proposed

regulation is estimated at $74 million. The total estimated annual cost

is $8.1 million per year. The total emission reduction is over 12,560

Mg/yr, resulting in an overall cost effectiveness of around $650/Mg per

year.

F. Economic Impacts

An economic impact analysis of these proposed standards was

prepared to evaluate primary and secondary impacts on (1) the slabstock

and molded foam sectors of the flexible polyurethane foam industry, (2)

consumers, and (3) society.

For the slabstock foam sector of the industry, the total annualized

social cost (in 1994 dollars) of this proposed regulation is $7.18

million. Market price is estimated to increase by 2.20 percent, and the

corresponding decrease in market output is estimated to be 1.08

percent. Employment loss is estimated to be 1.09 percent (i.e., 96

jobs).

For the molded foam sector, impacts on price and output are

estimated to be smaller than those predicted for the slabstock market.

The total annualized social cost (in 1994 dollars) of the proposed

standards for the molded foam subcategory is $0.71 million. Price is

estimated to increase by 1.14 percent, and the corresponding decrease

in market output is estimated to be 0.56 percent. Employment loss in

the molded sector is estimated to be 0.67 percent (37 jobs).

However, given the predicted changes in market price and output,

the industry will experience increases in the value of shipments (i.e.,

industry profits), because estimated price increases more than offset

the lower production volumes. Since no significant export or import

markets exist for the industry (due to prohibitive transportation

costs), no impacts on foreign trade are expected.

The analysis also predicts the number of plant closures that may

result from the imposition of compliance costs on a facility. For the

analysis, worst-case assumption is adopted that the facilities with the

highest emission control costs are the least efficient producers in the

market. Actual plant closures will be less than that predicted if

plants with the highest emission control costs are not the least

efficient producers in the industry. In addition, the outcome of

predicted closures is sensitive to the wide variety of emission control

technologies assigned to the model plants. If the control technology

assigned to the representative model plant is different than that which

would be chosen by an actual facility, the analysis could overestimate

the number of predicted plant closures. Therefore, a sensitivity

analysis was performed to test the outcome of closures based on the

assignment of control technology to model plants. For the slabstock

sector, plant closures are estimated to range from 1 to 3 facilities

for this proposed standard. For the molded foam sector, closures are

estimated to be zero for this proposed standard (a sensitivity analysis

was not performed for the molded foam production subcategory). Given

the significant amount of restructuring currently occurring in the

industry (mergers, buy-outs, and shut-downs), the number of facility

closures that will result from the proposed regulation is likely to be

minimal.

VII. Administrative Requirements

A. Public Hearing

A public hearing will be held, if requested, to discuss the

proposed standard in accordance with section 307(d)(5) of the Clean Air

Act. Persons wishing to make oral presentation on the proposed

standards for flexible polyurethane foam production should contact the

EPA at the address given in the ADDRESSES section of this preamble.

Oral presentations will be limited to 15 minutes each. Any member of

the public may file a written statement before, during, or within 30

days after the hearing. Written statements should be addressed to the

Air Docket Section address given in the ADDRESSES section of this

preamble and should refer to Docket No. A-95-48.

A verbatim transcript of the hearing and written statements will be

available for public inspection and copying during normal working hours

at the EPA's Air Docket Section in Washington, DC (see ADDRESSES

section of this preamble).

B. Docket

The docket is an organized and complete file of all the information

submitted to or otherwise considered by the EPA in the development of

this proposed rulemaking. The principal purposes of the docket are:

(1) To allow interested parties to readily identify and locate

documents so that they can intelligently and effectively participate in

the rulemaking process; and

(2) To serve as the record in case of judicial review (except for

interagency review materials [section 307(d)(7)(A)]).

C. Executive Order 12866

Under Executive Order 12866, (58 FR 51,735 (October 4, 1993)) the

Agency must determine whether the regulatory action is ``significant''

and therefore subject to Office of Management and Budget (OMB) review

and the requirements of the Executive Order. The Order defines

``significant regulatory action'' as one that is likely to result in a

rule that may:

(1) have an annual effect on the economy of $100 million or more or

adversely affect in a material way the economy, a sector of the

economy, productivity, competition, jobs, the environment, public

health or safety, or State, local, or tribal governments or

communities;

(2) create a serious inconsistency or otherwise interfere with an

action taken or planned by another agency;

(3) materially alter the budgetary impact of entitlements, grants,

user fees, or loan programs or the rights and obligations of recipients

thereof; or

(4) raise novel legal or policy issues arising out of legal

mandates, the President's priorities, or the principles set forth in

the Executive Order.

It has been determined that this rule is not a ``significant

regulatory action'' under the terms of Executive Order 12866 and is

therefore not subject to OMB review.

D. Enhancing the Intergovernmental Partnership Under Executive Order

12875

In compliance with Executive Order 12875 the EPA has involved State

and local Governments in the development of this rule. These

governments are not directly impacted by the rule; i.e., they are not

required to purchase control systems to meet the requirements of the

rule. However, they will be required to implement the rule; e.g.,

incorporate the rule into permits and enforce the rule. They will

collect permit fees that will be used to offset the resource burden of

implementing the rule. Three representatives of the State and local

governments have been members of the EPA Work Group developing the

rule. The Work Group has met numerous times, and comments have been

solicited from the Work Group members, including the State

representatives; and their comments

[[Page 68417]]

have been carefully considered in the rule development. In addition,

all States are encouraged to comment on this proposed rule during the

public comment period, and the EPA intends to fully consider these

comments in the final rulemaking.

E. Paperwork Reduction Act

The information collection requirements in this proposed rule have

been submitted for approval to the OMB under the Paperwork Reduction

Act, 44 U.S.C. 3501 et seq. An Information Collection Request (ICR)

document has been prepared by the EPA (ICR) No. 1783.01) and a copy may

be obtained from Sandy Farmer, OPPE Regulatory Information Division;

U.S. EPA (2137); 401 M St., S.W.; Washington, DC 20460 or by calling

(202) 260-2740.

The information collection is needed as part of the overall

compliance and enforcement program required by section 112 of the CAAA.

The prescribed records and reports are necessary to enable the EPA to

identify sources subject to the emission standards and to ensure that

the standards are being achieved. All information submitted to the EPA

for which a claim of confidentiality is made will be safeguarded

according to the Agency policies set forth in 40 CFR part 2, subpart

B--Confidentiality of Information.

The public reporting burden for this collection of information is

estimated to average 101 hours per respondent per year. The average

burden for the 78 affected slabstock foam producers is somewhat higher

than this estimate, due to their monthly recordkeeping and semiannual

reporting requirements, while the average burden for the 98 affected

molded foam manufacturers is less than 101 hours, since they are only

required to submit an initial one-time notification of compliance. No

cost burden associated with the purchase of new equipment or technology

is estimated to result from this collection of information.

``Burden'' means the total time, effort, or financial resources

expended by persons to generate, maintain, retain, or disclose or

provide information to or for a Federal agency. This includes the time

needed to review instructions; develop, acquire, install, and utilize

technology and systems for the purposes of collecting validating, and

verifying information, processing and maintaining information, and

disclosing and providing information; adjust the existing ways to

comply with any previously applicable instructions and requirements;

train personnel to be able to respond to a collection of information;

search data sources; complete and review the collection of information.

An Agency may not conduct or sponsor, and a person is not required

to respond to a collection of information, unless it displays a

currently valid OMB control number. The OMB control numbers for the

EPA's regulations are listed in 40 CFR Part 9 and 48 CFR Chapter 15.

Comments are requested on the Agency's need for this information,

the accuracy of the provided burden estimates, and any suggested

methods for minimizing respondent burden, including the use of

automated collection techniques. Send comments on the ICR to the

Director, OPPE Regulatory Information Division; U.S. Environmental

Protection Agency (2137); 401 M St., S.W.; Washington, DC 20460; and to

the Office of Information and Regulatory Affairs, Office of Management

and Budget, 725 17th St., N.W., Washington, DC 20503, marked

``Attention: Desk Officer for EPA.'' Include the ICR number in any

correspondence. Since OMB is required to make a decision concerning the

ICR between 30 and 60 days after December 27, 1996 a comment to the OMB

is best assured of having its full effect if the OMB receives it by

January 27, 1997. The final rule will respond to any OMB or public

comments on the information collection requirements contained in this

proposal.

F. Regulatory Flexibility Act

Pursuant to section 605(b) of the Regulatory Flexibility Act, 5

U.S.C. 605(b), as amended, Pub. L. 104-121, 110 Stat. 847, the EPA

certifies that this rule will not have a significant economic impact on

a substantial number of small entities and therefore no initial

regulatory flexibility analysis under section 604(a) of the Act is

required.

Due to insufficient data on the ownership of the plants in the

flexible polyurethane foam industry, an analysis of each parent company

in the industry was not feasible. Consequently, the EPA used data

collected in the section 114 survey to evaluate the impact on small

businesses based on model facilities. That analysis indicates that

there is a total of approximately 121 businesses (31 slabstock, 90

molded) that are affected by the proposed regulation, of which

approximately 71 are small businesses (18 slabstock, 53 molded).

The calculation of average compliance costs as a percent of

revenues is less than one percent for nearly all model facilities in

the analysis. The analysis also indicates a potential for business

courses ranging from 0 to 3 of the total number of estimated entities.

However, because there is insufficient data to determine the exact size

of the plants that may close, the analysis cannot determine if these

impacts will occur at small businesses. Given the results of the

analysis and the use of worst-case assumptions in the closure analysis,

the EPA believes that the affect of the proposed regulation on small

businesses will be minimal.

G. Unfunded Mandates Reform Act

Title II of the Unfunded Mandates Reform Act of 1995 (UMRA), P.L.

104-4, establishes requirements for Federal agencies to assess the

effects of their regulatory actions on State, local, and tribal

governments and the private sector. Under section 202 of the UMRA, the

EPA generally must prepare a written statement, including a cost-

benefit analysis, for proposed and final rules with ``Federal

mandates'' that may result in expenditures to State, local, and tribal

governments in the aggregate, or to the private sector, of $100 million

or more in any one year. Before promulgating an EPA rule for which a

written statement is needed, section 205 of the UMRA generally requires

the EPA to identify and consider a reasonable number of regulatory

alternatives and adopt the least costly, most cost-effective or least

burdensome alternative that achieves the objectives of the rule. The

provisions of section 205 do not apply when they are inconsistent with

applicable law. Moreover, section 205 allows the EPA to adopt an

alternative other than the least costly, most cost-effective, or least

burdensome alternative if the Administrator publishes with the final

rule an explanation why that alternative was not adopted. Before the

EPA establishes any regulatory requirements that may significantly or

uniquely affect small governments, including tribal governments, it

must have developed under section 203 of the UMRA a small government

agency plan. The plan must provide for notifying potentially affected

small governments, enabling officials of affected small governments to

have meaningful and timely input in the development of EPA regulatory

proposals with significant Federal intergovernmental mandates, and

informing, educating, and advising small governments on compliance with

the regulatory requirements.

The EPA has determined that this rule does not contain a Federal

mandate that may result in expenditures of $100 million or more for

State, local, and tribal governments, in aggregate, or the private

sector in any one year, because

[[Page 68418]]

they contain no requirements that apply to such governments or impose

obligations upon them.

H. Miscellaneous

In accordance with section 117 of the Act, publication of this

proposal was preceded by consultation with appropriate advisory

committees, independent experts, and Federal departments and agencies.

The Administrator will welcome comments on all aspects of this proposed

regulation, including health, economic and technical issues, and on the

proposed test methods.

This regulation will be reviewed 8 years from the date of

promulgation. This review will include an assessment of such factors as

evaluation of the residual health and environmental risks, any overlap

with other programs, the existence of alternative methods,

enforceability, improvements in emission control technology and health

data, and the recordkeeping and reporting requirements.

List of Subjects in 40 CFR Part 63

Environmental protection, Air pollution control, Hazardous

substances, Reporting and recordkeeping requirements.

Dated: December 9, 1996.

Carol M. Browner,

Administrator.

For the reasons set out in the preamble, part 63 of title 40,

chapter I of the Code of Federal Regulations is proposed to be amended

as follows:

PART 63--NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS

FOR AFFECTED SOURCE CATEGORIES

1. The authority citation for part 63 continues to read as follows:

Authority: 42 U.S.C. 7401, et seq.

2. It is proposed that part 63 be amended by adding subpart III,

consisting of Secs. 63.1290 through 63.1307, to read as follows:

Subpart III--National Emission Standards for Hazardous Air Pollutant

Emissions from Flexible Polyurethane Foam Production

Sec.

63.1290 Applicability.

63.1291 Compliance schedule.

63.1292 Definitions.

63.1293 Standards for slabstock flexible polyurethane foam

production.

63.1294 Standards for slabstock flexible polyurethane foam

production--diisocyanate emissions.

63.1295 Standards for slabstock flexible polyurethane foam

production--HAP ABA storage vessels.

63.1296 Standards for slabstock flexible polyurethane foam

production--HAP ABA equipment leaks.

63.1297 Standards for slabstock flexible polyurethane foam

production--HAP ABA emissions from the production line.

63.1298 Standards for slabstock flexible polyurethane foam

production--HAP emissions from equipment cleaning.

63.1299 Standards for slabstock flexible polyurethane foam

production--source-wide emission limitation.

63.1300 Standards for molded flexible polyurethane foam production.

63.1301 Standards for rebond foam production.

63.1302 Applicability of subpart A requirements.

63.1303 Monitoring requirements.

63.1304 Testing requirements.

63.1305 Alternative means of emission limitation.

63.1306 Reporting requirements.

63.1307 Recordkeeping Requirements.

Subpart III--National Emission Standards for Hazardous Air

Pollutant Emissions from Flexible Polyurethane Foam Production

Sec. 63.1290 Applicability.

(a) The provisions of this subpart apply to each new and existing

flexible polyurethane foam or rebond foam process that meets the

criteria listed in paragraphs (a) (1) through (3) of this section:

(1) Produces flexible polyurethane or rebond foam;

(2) Uses a HAP, except as provided in paragraph (c)(2) of this

section; and

(3) Is located at a major source plant site.

(b) For the purpose of this subpart, an affected source includes

all processes meeting the criteria in paragraphs (a)(1) through (a)(3)

of this section that are located at a contiguous plant site.

(c) A process meeting one of criteria listed in paragraphs (c) (1)

through (3) of this section shall not be subject to the provisions of

this subpart, but shall maintain supporting documentation of the

applicable criteria.

(1) A process located at a plant site for which the plant site does

not have a potential to emit more than 10 tons per year of any single

HAP, or more than 25 tons per year of all HAP. A limitation on

potential to emit may be obtained by notifying the Administrator of a

commitment to maintain emissions below the major source levels noted in

the Precompliance Report, as specified in Sec. 63.1306(c)(9), and

following the applicable reporting and recordkeeping procedures.

(2) A process exclusively dedicated to the fabrication of flexible

polyurethane foam; or

(3) A research and development process.

Sec. 63.1291 Compliance schedule.

(a) Existing affected sources shall be in compliance with all

provisions of this subpart no later than [3 years from effective date

of final rule].

(b) New or reconstructed affected sources shall be in compliance

with all provisions of this subpart upon startup.

Sec. 63.1292 Definitions.

All terms used in this subpart shall have the meaning given them in

the Act, in subpart A of this part, and in this section. If a term is

defined in subpart A and in this section, it shall have the meaning

given in this section for purposes of this subpart.

Auxiliary blowing agent, or ABA, means a low-boiling point liquid

added to assist foaming by generating gas beyond that resulting from

the isocyanate-water reaction.

Breakthrough means that point in the adsorption step when the mass

transfer zone (i.e., the section of the carbon bed where the adsorbate

is removed from the carrier gas stream) first reaches the carbon bed

outlet as the mass transfer zone moves down the bed in the direction of

flow. The breakthrough point is characterized by the beginning of a

sharp increase in the outlet adsorbate concentration.

Calibrate means to verify the accuracy of a measurement device

against a known standard. For the purpose of this subpart, there are

two levels of calibration. The initial calibration includes the

verification of the accuracy of the device over the entire operating

range of the device. Subsequent calibrations can be conducted for a

point or several points in a limited range of operation that represents

the most common operation of the device.

Canned motor pump means a pump with interconnected cavity housings,

motor rotors, and pump casing. In a canned motor pump, the motor

bearings run in the process liquid and all seals are eliminated.

Carbon adsorption system means a system consisting of a tank or

container that contains a specific quantity of activated carbon. For

the purposes of this subpart, a carbon adsorption system is used as a

control device for storage vessels. Typically, the spent carbon bed

does not undergo regeneration, but is replaced.

Connector means flanged, screwed, or other joined fittings used to

connect two pipe lines or a pipe line and a piece of equipment. A

common connector is a flange. Joined fittings welded completely around

the circumference of the interface are not considered to be connectors

for the purposes of this subpart.

[[Page 68419]]

Cured foam means flexible polyurethane foam with fully developed

physical properties. A period of 12 to 24 hours from pour is typically

required to completely cure foam, although mechanical or other devices

are sometimes used to accelerate the curing process.

Curing area means the area in a slabstock foam production facility

where foam buns are allowed to fully develop physical properties.

Diaphragm pump means a pump where the driving member is a flexible

diaphragm made of metal, rubber, or plastic. In a diaphragm pump, there

are no packing or seals that are exposed to the process liquid.

Diisocyanate means a compound containing two isocyanate groups per

molecule. The most common diisocyanate compounds used in the flexible

polyurethane foam industry are toluene diisocyanate (TDI) and methylene

diphenyl diisocyanate (MDI).

Flexible polyurethane foam means a flexible cellular polymer

containing urea and carbamate linkages in the chain backbone produced

by reacting a diisocyanate, polyol, and water.

Flexible polyurethane foam process means the equipment used to

produce a flexible polyurethane foam product. For the purpose of this

subpart, the flexible polyurethane foam process includes raw material

storage; production equipment and associated piping, ductwork, etc.;

and curing and storage areas.

Grade of foam means foam with a distinct combination of indentation

force deflection (IFD) and density values.

HAP ABA means methylene chloride, or any other Hap compound used as

an auxiliary blowing agent.

High-pressure mixhead means a mixhead where mixing is achieved by

impingement of the high pressure streams within the mixhead.

Identation Force Deflection (IFD) means a measure of the load

bearing capacity of flexible polyurethane foam. IFD is generally

measured as the force (in pounds) required to compress a 50 square inch

circular indentor foot into a four inch thick sample, typically 15

inches square or larger, to 25 percent of the sample's initial height.

In diisocyanate service means a piece of equipment that contains or

contacts a diisocyanate.

In HAP ABA service means a piece of equipment that contains or

contacts a HAP ABA.

Isocyanate means a reactive chemical grouping composed of a

nitrogen atom bonded to a carbon atom bonded to an oxygen atom; or a

chemical compound, usually organic, containing one or more isocyanate

groups.

Magnetic drive pump means a pump where an externally-mounted magnet

coupled to the pump motor drives the impeller in the pump casing. In a

magnetic drive pump, no seals contact the process fluid.

Metering pump means a pump used to deliver reactants, ABA, or

additives to the mixhead.

Mixhead means a device that mixes two or more component streams

before dispensing foam producing mixture to the desired container.

Mold release agent means any material which, when applied to the

mold surface, serves to prevent sticking of the foam part to the mold.

Molded flexible polyurethane foam means a flexible polyurethane

foam that is produced by shooting the foam mixture into a mold of the

desired shape and size.

Plant site means all contiguous or adjoining property 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 otherwise operated by the same entity, parent

entity, subsidiary, or any combination thereof.

Rebond foam means the foam resulting from a process of adhering

small particles of foam together to make a usable cushioning product.

Various adhesives and bonding processes are used. A typical application

for rebond foam is for carpet underlay.

Rebond foam process means the equipment used to produce a rebond

foam product. For the purpose of this subpart, the rebond foam process

includes raw material storage; production equipment and associated

piping, ductwork, etc.; and curing and storage areas.

Reconstructed source means an affected source undergoing

reconstruction, as defined in subpart A. For the purposes of this

subpart, process modifications made to reduce HAP ABA emissions to meet

the existing source requirements of this subpart shall not be counted

in determining whether or not a change or replacement meets the

definition of reconstruction.

Recovery device means an individual unit of equipment capable of

and used for the purpose of recovering chemicals for use, reuse, or

sale. Recovery devices include, but are not limited to, carbon

absorbers, absorbers, and condensers.

Research and development process means a laboratory or pilot plant

operation whose primary purpose is to conduct research and development

into new processes and products, where the operations are under the

close supervision of technically trained personnel, and which is not

engaged in the manufacture of products for commercial sale.

Run of foam means a continuous production of foam, which may

consist of several grades of foam.

Sealless pump means a canned-motor pump, diaphragm pump, or

magnetic drive pump, as defined in this section.

Slabstock flexible polyurethane foam means flexible polyurethane

foam that is produced in large continuous buns that are then cut into

the desired size and shape.

Slabstock flexible polyurethane foam production line includes all

portions of the flexible polyurethane foam process from the mixhead to

the point in the process where the foam is completely cured.

Storage vessel means a tank or other vessel that is used to store

diisocyanate or HAP ABA for use in the production of flexible

polyurethane foam. Storage vessels do not include vessels with

capacities smaller than 38 cubic meters (or 10,000 gallons).

Transfer pump means all pumps used to transport diisocyanate or HAP

ABA that are not metering pumps.

Transfer vehicle means a railcar, tank truck, or other vehicle used

to transport HAP ABA to the flexible polyurethane foam facility.

Sec. 63.1293 Standards for slabstock flexible polyurethane foam

production.

Each owner or operator of a new or existing slabstock affected

source shall comply with Sec. 63.1294 and either paragraph (a) or (b)

of this section:

(a) The emission point specific limitations in Secs. 63.1295

through 63.1298, or

(b) For sources that use only one HAP as an ABA and equipment

cleaner, the source-wide emission limitation in Sec. 63.1299.

Sec. 63.1294 Standards for slabstock flexible polyurethane foam

production--diisocyanate emissions.

Each new and existing slabstock affected source shall comply with

the provisions of this section.

(a) Diisocyanate storage vessels. Diisocyanate storage vessels

shall be equipped with either a system meeting the requirements in

paragraph (a)(1) of this section, or a carbon adsorption system meeting

the requirements of paragraph (a)(2) of this section.

(1) The storage vessel shall be equipped with a vapor return line

from the storage vessel to the tank truck or rail car that is connected

during unloading, and contains no leaks, where

[[Page 68420]]

a leak is detected by visual, audible, or any other detection method.

(2) The storage vessel shall be equipped with a carbon adsorption

system, meeting the monitoring requirements of Sec. 63.1303(a), that

routes displaced vapors through activated carbon before being

discharged to the atmosphere.

(b) Transfer pumps in diisocyanate service. Each transfer pump in

diisocyanate service shall meet the requirements of paragraph (b)(1) or

(b)(2) of this section.

(1) The pump shall be a sealless pump; or

(2) The pump shall be a submerged pump system meeting the

requirements in paragraphs (b)(2)(i) through (iii) of this section.

(i) The pump is completely immersed in bis(2-ethylhexyl)phthalate

(DEHP, CAS #118-81-7), 2(methyloctyl)phthalate (DINP, CAS #68515-48-0),

or another neutral oil.

(ii) The pump shall be visually monitored weekly to detect leaks,

(iii) When a leak is detected, it shall be repaired in accordance

with the procedures in paragraphs (b)(2)(iii)(A) and (b) of this

section.

(A) The leak shall be repaired as soon as practicable, but not

later than 15 calendar days after it is detected.

(B) A first attempt at repair shall be made no later than 5

calendar days after the leak is detected. First attempts at repair

include, but are not limited to, the following practices where

practicable:

(1) Tightening of packing gland nuts.

(2) Ensuring that the seal flush is operating at design pressure

and temperature.

(c) Other components in diisocyanate service. If evidence of a leak

is found by visual, audible, or any other detection method, it shall be

repaired as soon as practicable, but not later than 15 calendar days

after it is detected, except as provided in Sec. 63.1296(f). The first

attempt at repair shall be made no later than 5 calendar days after

each leak is detected.

Sec. 63.1295 Standards for slabstock flexible polyurethane foam

production--HAP ABA storage vessels.

Each owner or operator of a new or existing slabstock affected

source complying with the emission point specific limitation option

provided in Sec. 63.1293(a) shall control HAP ABA storage vessels in

accordance with the provisions of this section.

(a) Each HAP ABA storage vessel shall be equipped with either a

vapor balance system meeting the requirements in paragraph (b) of this

section, or a carbon adsorption system meeting the requirements of

paragraph (c) of this section.

(b) The storage vessel shall be equipped with a vapor balance

system. The owner or operator must ensure that the vapor return line

from the storage vessel to the tank truck or rail car is connected

during unloading, and that there are no significant leaks in the

system.

(c) The storage vessel shall be equipped with a carbon adsorption

system, meeting the monitoring requirements of Sec. 63.1303(a), that

routes displaced vapors through activated carbon before discharging to

the atmosphere.

Sec. 63.1296 Standards for slabstock flexible polyurethane foam

production--HAP ABA equipment leaks.

Each owner or operator of a new or existing slabstock affected

source complying with the emission point specific limitation option

provided in Sec. 63.1293(a) shall control HAP ABA emissions from leaks

from transfer pumps, valves, connectors, pressure-relief valves, and

open-ended lines in accordance with the provisions in this section.

(a) Pumps. Each pump in HAP ABA service shall be controlled in

accordance with either paragraph (a)(1) or (a)(2) of this section.

(1) The pump shall be a sealless pump, or

(2) Each pump shall be monitored for leaks in accordance with

paragraphs (a)(2) (i) and (ii) of this section. Leaks shall be repaired

in accordance with paragraph (a)(2)(iii) of this section.

(i) Each pump shall be monitored quarterly to detect leaks by the

method specified in Sec. 63.1304(a). If an instrument reading of 10,000

parts per million (ppm) or greater is measured, a leak is detected.

(ii) Each pump shall be checked by visual inspection each calendar

week for indications of liquids dripping from the pump seal. If there

are indications of liquids dripping from the pump seal, a leak is

detected.

(iii) When a leak is detected, it shall be repaired in accordance

with the procedures in paragraphs (a)(2)(iii) (A) and (B) of this

section, except as provided in paragraph (f) of this section.

(A) The leak shall be repaired as soon as practicable, but not

later than 15 calendar days after it is detected.

(B) A first attempt at repair shall be made no later than 5

calendar days after the leak is detected. First attempts at repair

include, but are not limited to, the following practices, where

applicable:

(1) Tightening of packing gland nuts.

(2) Ensuring that the seal flush is operating at design pressure

and temperature.

(b) Valves. Each valve in HAP ABA service shall be monitored for

leaks in accordance with paragraph (b)(1) of this section, except as

provided in paragraphs (b) (3) and (4) of this section. Leaks shall be

repaired in accordance with paragraph (b)(2) of this section.

(1) Each valve shall be monitored quarterly to detect leaks by the

method specified in Sec. 63.1304(a). If an instrument reading of 10,000

parts per million or greater is measured, a leak is detected.

(2) When a leak is detected, the owner or operator shall repair the

leak in accordance with the procedures in paragraphs (b)(2) (i) and

(ii) of this section, except as provided in paragraph (f) of this

section.

(i) The leak shall be repaired as soon as practicable, but not

later than 15 calendar days after it is detected.

(ii) A first attempt at repair shall be made no later than 5

calendar days after the leak is detected. First attempts at repair

include, but are not limited to, the following practices where

practicable:

(A) Tightening of bonnet bolts;

(B) Replacement of bonnet bolts;

(C) Tightening of packing gland nuts; and

(D) Injection of lubricant into lubricated packing.

(3) Any valve that is designated as an unsafe-to-monitor valve is

exempt from the requirements of paragraphs (b) (1) and (2) of this

section if:

(i) The owner or operator of the valve determines that the valve is

unsafe to monitor because monitoring personnel would be exposed to an

immediate danger as a consequence of complying with paragraphs (b) (1)

and (2) of this section; and

(ii) The owner or operator of the valve has a written plan that

requires monitoring of the valve as frequently as practicable during

safe-to-monitor times, but not more frequently than monthly.

(4) Any valve that is designated as a difficult-to-monitor valve is

exempt from the requirements of paragraphs (b) (1) and (2) of this

section if:

(i) The owner or operator of the valve determines that the valve

cannot be monitored without elevating the monitoring personnel more

than 2 meters above a support surface or it is not accessible at any

time in a safe manner;

(ii) The process within which the valve is located is an existing

source, or the owner or operator designates less

[[Page 68421]]

than 3 percent of the total number of valves in a new source as

difficult-to-monitor; and

(iii) The owner or operator of the valve follows a written plan

that requires monitoring of the valve at least once per calendar year.

(c) Connectors. Each connector in HAP ABA service shall be

monitored for leaks in accordance with paragraph (c)(1) of this

section, except as provided in paragraphs (c) (3) and (4) of this

section. Leaks shall be repaired in accordance with (c)(2) of this

section.

(1) Connectors shall be monitored at the times specified in

paragraphs (c)(1) (i) through (iii) of this section to detect leaks by

the method specified in Sec. 63.1304(a). If an instrument reading of

10,000 ppm or greater is measured, a leak is detected.

(i) Each connector shall be monitored annually, and

(ii) Each connector that has been opened or has otherwise had the

seal broken shall be monitored for leaks within the first 3 months

after being returned to HAP ABA service.

(iii) If a leak is detected, the connector shall be monitored for

leaks in accordance with paragraph (c)(1) of this section within the

first 3 months after its repair.

(2) When a leak is detected, it shall be repaired in accordance

with the procedures in paragraphs (c)(2) (i) and (ii) of this section,

except as provided in paragraph (c)(4) and paragraph (f) of this

section.

(i) The leak shall be repaired as soon as practicable, but no later

than 15 calendar days after the leak is detected.

(ii) A first attempt at repair shall be made no later than 5

calendar days after the leak is detected.

(3) Any connector that is designated as an unsafe-to-monitor

connector is exempt from the requirements of paragraph (c)(1) of this

section if:

(i) The owner or operator determines that the connector is unsafe

to monitor because personnel would be exposed to an immediate danger as

a result of complying with paragraph (c)(1) of this section; and

(ii) The owner or operator has a written plan that requires

monitoring of the connector as frequently as practicable during safe to

monitor periods, but not more frequently than annually.

(4) Any connector that is designated as an unsafe-to-repair

connector is exempt from the requirements of paragraphs (c)(1) and

(c)(2) of this section if:

(i) The owner or operator determines that repair personnel would be

exposed to an immediate danger as a consequence of complying with

paragraph (c)(2) of this section; and

(ii) The connector will be repaired as soon as practicable, but not

later than 6 months after the leak was detected.

(d) Pressure-relief devices. Each pressure-relief device in HAP ABA

service shall be monitored for leaks in accordance with paragraph

(d)(1) of this section. Leaks shall be repaired in accordance with

paragraph (d)(2) of this section.

(1) Each pressure-relief device in HAP ABA service shall be

monitored within 5 calendar days by the method specified in

Sec. 63.1304(a) if evidence of a potential leak is found by visual,

audible, olfactory, or any other detection method. If an instrument

reading of 10,000 ppm or greater is measured, a leak is detected.

(2) When a leak is detected, the leak shall be repaired as soon as

practicable, but not later than 15 calendar days after it is detected,

except as provided in paragraph (f) of this section. The owner or

operator shall make a first attempt at repair no later than 5 calendar

days after the leak is detected.

(e) Open-ended valves or lines.

(1) Each open-ended valve or line in HAP ABA service shall be

equipped with a cap, blind flange, plug, or a second valve, except as

provided in paragraph (e)(5) of this section.

(2) The cap, blind flange, plug, or second valve shall seal the

open end at all times except during operations requiring process fluid

flow through the open-ended valve or line, or during maintenance or

repair.

(3) Each open-ended valve or line equipped with a second valve

shall be operated in a manner such that the valve on the process fluid

end is closed before the second valve is closed.

(4) When a double block and bleed system is being used, the bleed

valve or line may remain open during operations that require venting

the line between the block valves but shall comply with paragraph (a)

of this section at all other times.

(5) Open-ended valves or lines in an emergency shutdown system

which are designed to open automatically in the event of a process

upset are exempt from the requirements of paragraphs (e) (1), (2), (3),

and (4) of this section.

(f) Delay of repair.

(1) Delay of repair of equipment for which leaks have been detected

is allowed for equipment that is isolated from the process and that

does not remain in diisocyanate or HAP ABA service.

(2) Delay of repair for valves and connectors is also allowed if:

(i) The owner or operator determines that emissions of purged

material resulting from immediate repair are greater than the fugitive

emissions likely to result from delay of repair, and

(ii) The purged material is collected and destroyed or recovered in

a control device when repair procedures are effected.

(3) Delay of repair for pumps is also allowed if repair requires

replacing the existing seal design with a sealless pump, and repair is

completed as soon as practicable, but not later than 6 months after the

leak was detected.

Sec. 63.1297 Standards for slabstock flexible polyurethane foam

production--HAP ABA emissions from the production line.

(a) Each owner or operator of a new or existing slabstock affected

source complying with the emission point specific limitation option

provided in Sec. 63.1293(a)(1) shall control HAP ABA emissions from the

slabstock polyurethane foam production line in accordance with the

provisions in this section. Compliance shall be determined on a rolling

annual basis as described in paragraph (a)(1) of this section. As an

alternative, the owner or operator can determine compliance on a

monthly basis, as described in paragraphs (a)(2) and (a)(3) of this

section.

(1) Rolling annual compliance. In determining compliance on a

rolling annual basis, actual HAP ABA emissions shall be compared to

allowable HAP ABA emissions for each consecutive 12-month period. The

allowable HAP ABA emission level shall be calculated based on the

production for the 12-month period, resulting in a potentially

different allowable level for each 12-month period. Compliance shall be

determined each month for the previous 12-month period. The compliance

requirements are provided in paragraph (b) of this section.

(2) Monthly compliance alternative. As an alternative to

determining compliance on a rolling annual basis, an owner or operator

can determine compliance by comparing actual HAP ABA emissions to

allowable HAP ABA emissions for each month. The allowable HAP ABA

emission level shall be calculated based on the production for the

month, resulting in a potentially different allowable level each month.

The requirements for this monthly compliance alternative are provided

in paragraph (c) of this section.

(3) Each owner or operator complying with the monthly compliance

alternative described under paragraph

[[Page 68422]]

(a)(2) of this section shall include notification of the intent to use

this option in the precompliance report.

(4) Each owner or operator electing to change between the

compliance methods described under paragraphs (a)(1) and (a)(2) of this

section shall notify the Administrator no later than 180 days prior to

the change.

(b) Rolling Annual Compliance. At each slabstock foam production

source complying with the rolling annual compliance provisions

described in Sec. 63.1297(a)(1), actual HAP ABA emissions shall not

exceed the allowable HAP ABA emission level for a consecutive 12-month

period. The actual HAP ABA emission level for a consecutive 12-month

period shall be determined using the procedures in paragraph (b)(1) of

this section, and the allowable HAP ABA emission level for the

corresponding 12-month period shall be calculated in accordance with

paragraph (b)(2) of this section.

(1) The actual HAP ABA emissions for a 12-month period shall be

calculated as the sum of actual monthly HAP ABA emissions for each of

the individual 12 months in the period. Actual monthly HAP ABA

emissions shall be based on the amount of HAP ABA added to the

slabstock foam production line at the mixhead, determined in accordance

with Sec. 63.1303(b). Slabstock foam production sources using recovery

devices to reduce HAP ABA emissions shall determine actual monthly HAP

ABA emissions using the procedures in paragraph (e) of this section.

(2) The allowable HAP ABA emissions for a consecutive 12-month

period shall be calculated as the sum of allowable monthly HAP ABA

emissions for each of the individual 12 month shall be calculated using

Equation 1.

[GRAPHIC] [TIFF OMITTED] TP27DE96.004

Where:

emissallow, month = Allowable HAP ABA emissions from the

slabstock foam production source for the month, pounds.

m = Number of slabstock foam production lines.

polyoli = Amount of polyol used in the month in the production

of foam grade i on foam production line j, determined in accordance

with paragraph (b)(3) of this section, pounds.

n = Number of foam grades produced in the month on foam production

line j.

limiti = HAP ABA formulation limit for foam grade i, parts HAP

ABA per 100 parts polyol. The HAP ABA formulation limits are

determined in accordance with paragraph (d) of this section.

(3) The amount of polyol used for specific foam grades shall be

based on the amount of polyol added to the slabstock foam production

line at the mixhead, determined in accordance with the provisions of

Sec. 63.1303(b).

(c) Monthly Compliance Alternative. At each slabstock foam

production source complying with the monthly compliance alternative

described in paragraph (a)(2) of this section, actual HAP ABA emissions

shall not exceed the corresponding allowable HAP ABA emission level for

the same month. The actual monthly HAP ABA emission level shall be

determined using the procedures in paragraph (c)(1) of this section,

and the allowable monthly HAP ABA emission level shall be calculated in

accordance with paragraph (c)(2) of this section.

(1) The actual monthly HAP ABA emission shall be based on the

amount of HAP ABA added to the slabstock foam production line at the

mixhead, determined in accordance with Sec. 63.1303(b). Slabstock foam

production sources using recovery devices to reduce HAP ABA emissions

shall determine actual monthly HAP ABA emissions using the procedures

in paragraph (e) of this section.

(2) The allowable HAP ABA emissions for the month shall be

determined in accordance with Equation 1.

(d) HAP ABA Formulation Limitations. The HAP ABA formulation

limitations shall be determined in accordance with paragraphs (d)(1)

through (d)(3) of this section.

(1) For existing sources, the HAP ABA formulation limitation for

each grade of slabstock foam produced shall be determined using

Equation 2.

[GRAPHIC] [TIFF OMITTED] TP27DE96.005

Where:

ABAlimit = HAP ABA formulation limitation, parts HAP ABA

allowed per hundred parts polyol (pph).

IFD = Indentation force deflection, pounds.

DEAN = Density, pounds per cubic foot.

(2) For new sources, the HAP ABA formulation limitation for each

grade of slabstock foam produced shall be determined as described in

paragraphs (d)(2)(i) through (d)(2)(iv) of this section.

(i) For each foam grade with a density of 0.95 pounds per cubic

foot or less, the HAP ABA formulation limitation shall be determined

using Equation 2.

(ii) For each foam grade with a density of 1.4 pounds per cubic

foot or less, and an IFD of 15 pounds or less, the HAP ABA formulation

limitation shall be determined using Equation 2.

(iii) For each foam grade with a density greater than 0.95 pounds

per cubic foot and an IDF greater than 15 pounds, the HAP ABA

formulation limitation shall be zero.

(iv) For each foam grade with a density greater than 1.40 pounds

per cubic foot, the HAP ABA formulation limitation shall be zero.

(3) The IFD and density for each foam grade shall be determined in

accordance with Sec. 63.1304(b).

(e) Compliance using recovery devices. If a recovery device is used

to comply with paragraphs (b) through (c) of this section, the owner or

operator shall determine the allowable HAP ABA emissions for each month

using Equation 1 in paragraph (b)(2) of this section, and the actual

monthly HAP ABA emissions in accordance with paragraph (e)(1) of this

section. The owner or operator shall also comply with the provisions of

paragraph (e)(2) of this section.

(1) The actual monthly HAP ABA emissions shall be determined using

Equation 3.

[[Page 68423]]

[GRAPHIC] [TIFF OMITTED] TP27DE96.006

Where:

Eactual = Actual HAP ABA emissions after control, pounds/month.

Eunc = Uncontrolled HAP ABA emissions, pounds/month, determined

in accordance with paragraph (b)(2) of this section.

HAPABArecovered = HAP ABA recovered, pounds/month, determined

in accordance with paragraph (e)(2) of this section.

(2) The amount of HAP ABA recovered shall be determined in

accordance with Sec. 63.1303(c).

Sec. 63.1298 Standards for slabstock flexible polyurethane foam

production--HAP emissions from equipment cleaning.

Each owner or operator of a new or existing slabstock affected

source complying with the emission point specific limitation option

provided in Sec. 63.1293(a)(1) shall not use a HAP, or a HAP-containing

product, as an equipment cleaner.

Sec. 63.1299 Standards for slabstock flexible polyurethane foam

production--source-wide emission limitation.

Each owner or operator of a new or existing slabstock affected

source complying with the source-wide emission limitation option

provided in Sec. 63.1293(a)(2) shall control HAP ABA storage and

equipment leak emissions, HAP ABA emissions from the production line,

and equipment cleaning HAP emissions in accordance with the provisions

in this section. Compliance shall be determined on a rolling annual

basis in accordance with paragraph (a) of this section. As an

alternative, the owner or operator can determine compliance monthly, as

described in paragraph (b) of this section.

(a) Rolling annual compliance. Under the rolling annual compliance

provisions, actual source-wide HAP ABA storage and equipment leak

emissions, HAP ABA emissions from the production line, and equipment

cleaning HAP emissions are compared to allowable source-wide emissions

for each consecutive 12-month period. The allowable source-wide HAP

emission level is calculated based on the production for the 12-month

period, resulting in a potentially different allowable level for each

12-month period. While compliance is on an annual basis, compliance

shall be determined monthly for the preceding 12-month period. The

actual source-wide HAP emission level for a consecutive 12-month period

shall be determined using the procedures in paragraph (c) of this

section, and the allowable HAP emission level for a consecutive 12-

month period shall be determined using the procedures in paragraph (d)

of this section.

(b) Monthly compliance alternative. As an alternative to

determining compliance on a rolling annual basis, an owner or operator

can determine compliance by comparing actual HAP emissions to allowable

HAP emissions for each month. The allowable source-wide emission level

is calculated based on the production for the month, resulting in a

potentially different allowable level each month. The actual monthly

emission level shall be determined using the procedures in paragraph

(c) of this section, and the allowable monthly HAP ABA emission level

shall be determined using the procedures in paragraph (e) of this

section.

(c) Procedures for determining actual source-wide HAP emissions.

The actual source-wide HAP ABA storage and equipment leak emissions,

HAP ABA emissions from the production line, and equipment cleaning HAP

emissions shall be determined using the procedures in this section.

Actual source-wide HAP emissions for each consecutive 12-month period

shall be calculated as the sum of actual monthly source-wide HAP

emissions for each of the individual 12 months in this period. Actual

source-wide HAP emissions for each individual month shall be determined

using the procedures specified in paragraphs (c) (1) through (3) of

this section.

(1) The actual source-wide HAP emissions for a month shall be

determined using Equation 4 and the information determined in

accordance with paragraphs (c) (2) and (3) of this section.

[GRAPHIC] [TIFF OMITTED] TP27DE96.007

Where:

PWEactual = Actual source-wide HAP ABA and equipment cleaning

HAP emissions for a month, pounds/month.

n = Number of HAP ABA storage vessels.

STi, begin = Amount of HAP ABA in storage vessel i at the

beginning of the month, pounds, determined in accordance with the

procedures listed in paragraph (c)(2) of this section.

STi, end = Amount of HAP ABA in storage vessel i at the end of

the month, pounds, determined in accordance with the procedures

listed in paragraph (c)(2) of this section.

ADDi = Amount of HAP ABA in storage vessel i at the end of the

month, pounds, determined in accordance with the procedures listed

in paragraph (c)(1)(3) of this section.

(2) The amount of HAP ABA in a storage vessel shall be determined

by monitoring the HAP ABA level in the storage vessel in accordance

with Sec. 63.1303(d).

(3) The amount of HAP ABA added to a storage vessel for a given

month shall be the sum of the amounts of all individual HAP ABA

deliveries that occur during the month. The amount of each individual

HAP ABA delivery shall be determined in accordance with

Sec. 63.1303(e).

(4) At each slabstock foam production source complying with the

monthly compliance alternative described in paragraph (b) of this

section, the actual source-wide HAP emissions for each month shall be

calculated in accordance with paragraphs (c) (1) through (3) of this

section.

(d) The allowable HAP emissions for a consecutive 12-month period

shall be calculated as the sum of allowable monthly HAP ABA emissions

for each of the individual 12 months in the period. Allowable HAP ABA

emissions for each individual month shall be calculated using Equation

5.

[[Page 68424]]

[GRAPHIC] [TIFF OMITTED] TP27DE96.008

Where:

emissallow,month = Allowable HAP ABA storage and equipment leak

emissions HAP ABA emissions from the production line, and equipment

cleaning HAP emissions from the slabstock foam production source for

the month, pounds.

m = Number of slabstock foam production lines.

polyoli = Amount of polyol used in the month in the production

of foam grade i on foam production line j, determined in accordance

with Sec. 63.1303(b), pounds.

n = Number of foam grades produced in the month on foam production

line j.

limiti = HAP ABA formulation limit for foam grade i, parts HAP

ABA per 100 parts polyol. The HAP ABA formulation limits are

determined in accordance with Sec. 63.1297(d).

Sec. 63.1300 Standards for molded flexible polyurethane foam

production.

Each owner or operator of a new or existing molded affected source

shall comply with the provisions in paragraphs (a), (b), and (c) of

this section.

(a) A HAP solvent shall not be used as an equipment cleaner to

flush the mixhead, nor shall it be used elsewhere at a molded flexible

polyurethane foam source.

(b) A HAP-based mold release agent shall not be used in a molded

flexible foam source.

(c) A HAP-based adhesive shall not be used to repair foam products

in a molded flexible polyurethane foam source.

Sec. 63.1301 Standards for rebond foam production.

Each owner or operator of a new or existing rebond foam affected

source shall comply with the provisions in paragraphs (a) and (b) of

this section.

(a) A HAP solvent shall not be used as an equipment cleaner at a

rebond foam source.

(b) A HAP-based mold release agent shall not be used in a rebond

foam source.

Sec. 63.1302 Applicability of subpart A requirements.

Table 1 provides cross references to 40 CFR part 63, subpart A,

indicating the applicability of the general provisions requirements to

subpart III.

Sec. 63.1303 Monitoring requirements.

Owners and operators of affected sources shall comply with each

applicable monitoring provision in this section.

(a) Monitoring requirements for storage vessel carbon adsorption

systems. Each owner or operator using a carbon adsorption system to

meet the requirements of Sec. 63.1294(a) or Sec. 63.1295 shall monitor

the concentration level of the HAP or the organic compounds in the

exhaust vent stream (or outlet stream exhaust) from the carbon

adsorption system monthly and replace the existing carbon with fresh

carbon immediately upon indication of carbon breakthrough.

(1) As an alternative to monthly monitoring, the owner or operator

can set the monitoring frequency at an interval no greater than 20

percent of the carbon replacement interval, which is established using

a design analysis described in paragraphs (a)(1)(i) through (iii) of

this section.

(i) The design analysis shall consider the vent stream composition,

constituent concentration, flow rate, relative humidity, and

temperature.

(ii) The design analysis shall establish the outlet organic

concentration level, the capacity of the carbon bed, and the working

capacity of activated carbon used for the carbon bed, and

(iii) The design analysis shall establish the carbon replacement

interval based on the total carbon working capacity of the carbon

adsorption system and the schedule for filling the storage vessel.

(2) Measurement of HAP concentration shall be made using 40 CFR

part 60, appendix A, Method 18. The measurement shall be conducted over

at least one 5-minute interval during which the storage vessel is being

filled.

(b) Monitoring for HAP ABA and polyol added to the foam production

line at the mixhead.

(1) The owner or operator of each slabstock affected source shall

comply with the provisions in paragraph (b)(1)(i) of this section, and

the provisions of paragraph (b)(1)(ii) of this section, if applicable.

(i) All slabstock affected sources shall continuously monitor the

amount of polyol added at the mixhead when foam is being poured, in

accordance with paragraphs (b)(2) and (4) of this section.

(ii) For sources using the emission point specific limitation

option provided in Sec. 63.1293(a)(1), the amount of HAP ABA added at

the mixhead shall be continuously monitored when foam is being poured

in accordance with paragraphs (b)(2)(ii), (3), and (4) of this section.

(2) The owner or operator shall monitor either:

(i) Pump revolutions; or

(ii) Flow rate.

(3) The device used to monitor the parameter from paragraph (b)(2)

shall have an accuracy to within 2.0 percent of the HAP

ABA being measured, and shall be calibrated initially, and

periodically, in accordance with paragraph (b)(3) (i) or (ii) of this

section.

(i) For polyol pumps, the device shall be calibrated at least once

each 6 months.

(ii) For HAP ABA pumps, the device shall be calibrated at least

once each month.

(4) Measurements must be recorded at the beginning and end of the

production of each grade of foam within a run of foam.

(5) As an alternative to the monitoring described in paragraphs (b)

(2) through (4) of this section, the owner or operator may develop an

alternative monitoring program. The components of an alternative

monitoring plan shall include, at a minimum, the items listed in

paragraphs (b)(5) (i) through (iv) of this section.

(i) A description of the parameter to be continuously monitored

when foam is being poured to measure the amount of HAP ABA or polyol

added at the mixhead.

(ii) A description of how the monitoring results will be recorded,

and how the results will be converted into amount of HAP ABA or polyol

delivered to the mixhead.

(iii) Data demonstrating that the monitoring device is accurate to

within 2.0 percent.

(iv) Procedures to ensure that the accuracy of the parameter

monitoring results is maintained. These procedures shall, at a minimum,

consist of periodic calibration of all monitoring devices.

(c) Recovered HAP ABA monitoring. The owner or operator of each

slabstock affected source using a recovery device to reduce HAP ABA

emissions shall develop a recovered HAP ABA monitoring and

recordkeeping program. The components of these plans shall include, at

a minimum, the items listed in paragraphs (c) (1) through (5) of this

section.

(1) A device, installed, calibrated, maintained, and operated

according to the manufacturer's specifications, that

[[Page 68425]]

indicates the cumulative amount of HAP ABA recovered by the solvent

recovery device over each 1-month period. The device shall be certified

by the manufacturer to be accurate to within 2.0 percent.

(2) The location where the monitoring will occur. The location

shall ensure that the measurements are taken after HAP ABA has been

fully recovered (i.e., after separation from water introduced into the

HAP ABA during regeneration).

(3) A description of the parameter to be monitored, and the times

the parameter will be monitored.

(4) Data demonstrating that the monitoring device is accurate to

within 2.0 percent.

(5) Procedures to ensure that the accuracy of the parameter

monitoring results is maintained. These procedures shall, at a minimum,

consist of periodic calibration of all monitoring devices.

(d) Monitoring of HAP ABA in a Storage Vessel. The amount of HAP

ABA in a storage vessel shall be determined weekly by monitoring the

HAP ABA level in the storage vessel using a device that meets the

criteria described in paragraphs (d)(1) through (d)(3) of this section.

(1) A device certified by the manufacturer to be no less than 99

percent accurate,

(2) The device must have either a digital or printed output,

(3) The device must be calibrated initially and at least once per

year thereafter.

(e) Monitoring of HAP ABA added to a Storage Vessel. The amount of

HAP ABA added to a storage vessel during a delivery shall be determined

in accordance with either paragraphs (e) (1), (2), or (3) of this

section.

(1) The volume of HAP ABA added to the storage vessel shall be

determined by monitoring the flow rate using a device with an accuracy

of 2.0 percent, and calibrated initially and at least once

each six months thereafter.

(2) The weight of HAP ABA added to the storage vessel shall be

calculated as the difference of the full weight of the transfer vehicle

prior to unloading into the storage vessel and the empty weight of the

transfer vehicle after unloading into the storage vessel. The weight

shall be determined using a scale meeting the requirements of either

paragraph (e)(2) (i) or (ii) of this section.

(i) A scale approved by the State or local agencies using the

procedures contained in the National Institute of Standards and

Technology Handbook 44.

(ii) A scale determined to be in compliance with the requirements

of the National Institute of Standards and Technology Handbook 44 at

least once per year by a registered scale technician.

(3) As an alternative to the monitoring options described in

paragraphs (e)(1) and (e)(2) of this section, the owner or operator may

develop an alternative monitoring program shall include, at a minimum,

the items listed in paragraphs (e)(3) (i) through (iv) of this section.

(i) A description of the parameter to be monitored to determine the

amount of HAP ABA added to the storage vessel during a delivery,

(ii) A description of how the results will be recorded, and how the

results will be converted into the amount of HAP ABA added to the

storage vessel during a delivery,

(iii) Data demonstrating that the monitoring device is accurate to

within 2.0 percent, and

(iv) Procedures to ensure that the accuracy of the monitoring

measurements is maintained. These procedures shall, at a minimum,

consist of periodic calibration of all monitoring devices.

Sec. 63.1304 Testing Requirements.

Owners and operators of affected sources shall use the test methods

listed in this section, as applicable, to demonstrate compliance with

this subpart.

(a) Test Method and Procedures to Determine Equipment Leaks.

Monitoring, as required under Secs. 63.1294(c) and 63.1296, shall

comply with the following requirements:

(1) Monitoring shall comply with Method 21 of 40 CFR part 60,

appendix A.

(2) The detection instrument shall meet the performance criteria of

Method 21 of 40 CFR part 60, appendix A, except that the instrument

response factor criteria in section 3.1.2(a) of Method 21 shall be for

the average composition of the source fluid, rather than for each

individual VOC in the stream. For source streams that contain nitrogen,

air, or other inerts which are not HAP or VOC, the average stream

response factor shall be calculated on an inert-free basis. The

response factor may be determined at any concentration for which

monitoring for leaks will be conducted.

(3) The instrument shall be calibrated before use on each days of

its use by the procedures specified in Method 21 of 40 CFR part 60,

appendix A.

(4) Calibration gases shall be:

(i) Zero air (less than 10 ppm of hydrocarbon in air); and

(ii) A mixture of methane and air at a concentration of

approximately, 1,000 ppm for all transfer pumps; and 500 ppm for all

other equipment, except as provided in paragraph (f)(4)(iii) of this

section.

(iii) The instrument may be calibrated at a higher methane

concentration (up to 2,000 ppm) than the leak definition concentration

for a specific piece of equipment for monitoring that piece of

equipment. If the monitoring instrument's design allows for multiple

calibration gas concentrations, then the lower concentration

calibration gas shall be no higher than 2,000 ppm methane and the

higher concentration calibration gas shall be no higher than 10,000 ppm

methane.

(5) Monitoring shall be performed when the equipment is in HAP ABA

service, in use with an acceptable surrogate volatile organic compound

which is not a HAP ABA, or is in use with any other detectable gas or

vapor.

(6) If no instrument is available onsite that will meet the

performance criteria specified in section 3.1.2(a) of Method 21 of 40

CFR Part 60, appendix A, the readings from an available instrument may

be adjusted by multiplying by the average response factor for the

stream.

(b) Test Method to Determine Foam Properties. The IFD and density

shall be determined using ASTM D3574, using a sample of foam cut from

the center of the foam bun. The maximum sample size for which the IFD

and density is determined shall not be larger than 24 inches by 24

inches by 4 inches.

Sec. 63.1305 Alternative Means of Emission Limitation.

An owner or operator of an affected source may request approval to

use an alternative means of emission limitation, following procedures

in this section.

(a) The owner or operator can request approval to use an

alternative means of emission, limitation in the precompliance report

for existing sources, the application for construction or

reconstruction for new sources, or at any time.

(b) This request shall include a complete description of the

alternative means of emission limitation.

(c) Each owner or operator applying for permission to use an

alternative means of emission limitation under Sec. 63.6(g) shall be

responsible for collecting and verifying data to demonstrate the

emission reduction achieved by the alternative means of emission

limitation.

(d) Use of the alternative means of emission limitation shall not

begin until approval is granted by the Administrator in accordance with

Sec. 63.6(g).

[[Page 68426]]

Sec. 63.1306 Reporting requirements.

Owners and operators of affected sources shall comply with each

applicable reporting provision in this section.

(a) Initial Notification. Each affected source shall submit an

initial notification in accordance with Sec. 63.9(b).

(b) Application for Approval of Construction or Reconstruction.

Each owner or operator shall submit an application for approval of

construction or reconstruction in accordance with the provisions of

Sec. 63.5(d).

(c) Precompliance Report. Each slabstock affected source shall

submit a precompliance report no later than (12 months before the

compliance date). This report shall contain the information listed in

paragraphs (c)(1) through (6) of this section, as applicable. Processes

requesting a federally enforceable emission limitation in accordance

with Sec. 63.1290(b)(1) shall submit a precompliance report in

accordance with paragraph (c)(9) of this section.

(1) Whether the source will comply with the emission point specific

limitations described in Sec. 63.1293(a), or with the source-wide

emission limitation described in Sec. 63.1293(b).

(2) For a source complying with the emission point specific

limitations, whether the source will comply on a rolling annual basis

in accordance with Sec. 63.1297(b), or will comply with the monthly

alternative for compliance contained in Sec. 63.1297(c).

(3) For a source complying with the source-wide emission

limitation, whether the source will comply on a rolling annual basis in

accordance with Sec. 63.1299(a), or will comply with the monthly

alternative for compliance contained in Sec. 63.1299(b).

(4) A description of how HAP ABA and/or polyol added at the mixhead

will be monitored, and whether or not the owner or operator is

developing an alternative monitoring program, as described in

Sec. 63.1303(b)(5).

(5) Notification of the intent to use a recovery device to comply

with the provisions of Sec. 63.1297 or Sec. 63.1299.

(6) For slabstock affected sources complying with Sec. 63.1297 or

Sec. 63.1299 using of a recovery device, the continuous recovered HAP

ABA monitoring and recordkeeping program, developed in accordance with

Sec. 63.1303(c).

(7) For sources complying with the source-wide emission limitation,

a description of how the amount of HAP ABA in a storage vessel shall be

determined.

(8) For sources complying with the source-wide emission limitation,

a description of how the amount of HAP ABA added to a storage vessel

during a delivery will be monitored, and whether or not the owner or

operator is developing an alternative monitoring program, as described

in Sec. 63.1303(e)(3).

(9) Processes requesting a federally enforceable emission

limitation in accordance with Sec. 63.1290(b)(1) shall submit a

precompliance report. This report shall notify the Agency of the

intention to limit emissions to less than 10 tons per year of any

single HAP, and less than 25 tons per year of all HAP from the plant

site. Notification of this status relieves the owner or operator from

the provisions of this subpart, other than the requirements to annually

report HAP emissions in accordance with (f)(3) of this section, and to

maintain records documenting the reported emission estimates.

(d) Notification of Compliance Status. Each affected source shall

submit a notification of compliance status report no later than (180

days after the compliance date). For slabstock affected sources, this

report shall contain the information listed in paragraphs (d)(1)

through (3) of this section, as applicable. This report shall contain

information listed in paragraph (d)(4) of this section for molded foam

processes and in paragraph (d)(5) for rebond foam processes.

(1) A list of diisocyanate storage vessels, along with a record of

the type of control utilized for each storage vessel.

(2) For transfer pumps in diisocyanate service, a record of the

type of control utilized for each transfer pump.

(3) If the source is complying with the emission point specific

limitations of Sec. Sec. 63.1294 through 63.1298, the information

listed in paragraphs (b)(3)(i) through (iii) of this section.

(i) A list of HAP ABA storage vessels, along with a record of the

type of control utilized for each storage vessel.

(ii) A list of pumps, valves, connectors, pressure-relief devices,

and open-ended valves or lines in HAP ABA service.

(iii) A list of any modifications to equipment in HAP ABA service

made to comply with the provisions of Sec. 63.1296.

(4) A statement that the molded foam affected source is in

compliance with Sec. 63.1300, or a statement that molded foam processes

at an affected source are in compliance with Sec. 63.1300.

(5) A statement that the rebond foam affected source is in

compliance with Sec. 63.1301, or that rebond processes at an affected

source are in compliance with Sec. 63.1301.

(e) Semi-Annual Compliance Reports. Each slabstock affected source

shall submit a compliance report containing the information specified

in paragraphs (e)(1) through (3) of this section semiannually no later

than 60 days after the end of each 180 day period. The first report

shall be submitted no later than 240 days after the date that the

Notification of Compliance Status is due and shall cover the 6-month

period beginning on the date that the Notification of Compliance Status

Report is due.

(1) For slabstock affected sources complying with the rolling

annual compliance provisions of either Sec. 63.1297 or Sec. 63.1299,

the allowable and actual HAP ABA emissions (or allowable and actual

source-wide HAP emissions) for each of the 12-month periods ending on

each of the six months in the reporting period. This information is not

required to be included in the initial semi-annual compliance report.

(2) For sources complying with the monthly compliance alternative

of either Sec. 63.1297 or Sec. 63.1299, the allowable and actual HAP

ABA emissions (or allowable and actual source-wide HAP emissions) for

each of the six months in the reporting period.

(3) For sources complying with the storage vessel provisions of

Sec. 63.1294(a) or Sec. 63.1295 using a carbon adsorption system,

instances where the carbon in the system is replaced, along with the

date of the replacement.

(4) Any equipment leaks that were not repaired in accordance with

Sec. 63.1294(b) or Sec. 63.1296.

(f) Other Reports.

(1) Change in selected emission limitation. An owner or operator

electing to change their slabstock flexible polyurethane foam emission

limitation (from emission point specific limitations to a source-wide

emission limitation, or vice versa), selected in accordance with

Sec. 63.1293, shall notify the Administrator no later than 180 days

prior to the change.

(2) Change in selected compliance method. An owner or operator

changing the period of compliance for either Sec. 63.1297 or

Sec. 63.1299 (between rolling annual and monthly) shall notify the

Administrator no later than 180 days prior to the change.

(3) Annual emission reports for area sources. Processes exempted

from this subpart through a federally enforceable emission limitation

in accordance with Sec. 63.1290(b)(1), and that have notified the

Administrator of this self-imposed limitation through

Sec. 63.1306(c)(9), shall

[[Page 68427]]

submit an annual emission report. This report shall be submitted once

per year and shall report the total HAP emissions for the plant site

for the previous 12-month period.

Sec. 63.1307 Recordkeeping requirements.

The applicable records designated in paragraphs (a) through (c) of

this section shall be maintained by owners and operators of processes

exempted from this subpart through a federally enforceable emission

limitation in accordance with Sec. 63.1290(b)(1) shall maintain records

in accordance with paragraph (d) of this section.

(a) Storage Vessel Records.

(1) A list of diisocyanate storage vessels, along with a record of

the type of control utilized for each storage vessel.

(2) For each slabstock affected source complying with the emission

point specific limitations of Secs. 63.1294 through 63.1298, a list of

HAP ABA storage vessels, along with a record of the type of control

utilized for each storage vessel.

(3) For storage vessels complying through the use of a carbon

adsorption system, paragraph (a)(3) (i) or (ii), and paragraph

(a)(3)(iii) of this section.

(i) Records of dates and times when the carbon absorption system is

monitored for carbon breakthrough and the monitoring device reading,

when the device is monitored monthly in accordance with

Sec. 63.1303(a); or

(ii) For affected sources monitoring at an interval no greater than

20 percent of the carbon replacement interval, in accordance with

Sec. 63.1303(a)(1), the records listed in paragraphs (a)(3)(ii) (A) and

(B) of this section.

(A) Records of the design analysis, including all the information

listed in Sec. 63.1303(a)(1) (i) through (iii), and

(B) Records of dates times when the carbon adsorption system is

monitored for carbon breakthrough and the monitoring device reading.

(iii) Date when the existing carbon in the carbon adsorption system

is replaced with fresh carbon.

(b) Equipment Leak Records.

(1) A list of components as specified in paragraphs (b)(1) (i) and

(ii) of this section.

(i) For all affected sources, a list of components in diisocyanate

service,

(ii) For affected sources complying with the emission point

specific limitations of Secs. 63.1294 through 63.1298, a list of

components in HAP ABA service.

(2) For transfer pumps in diisocyanate service, a record of the

type of control utilized for each transfer pump and the date of

installation.

(3) When a leak is detected as specified in Sec. 63.1294(b)(2)(ii),

Sec. 63.1294(c), Sec. 63.1296(a)(2), (b)(1), (c)(1), and (d)(1), the

requirements listed in paragraphs (b)(3) (i) and (ii) of this section

apply:

(i) Leaking equipment shall be identified in accordance with the

requirements in paragraphs (b)(3)(i) (A) and through (C) of this

section.

(A) A readily visible identification, marked with the equipment

identification number, shall be attached to the leaking equipment.

(B) The identification on a valve may be removed after it has been

monitored for 2-successive months as specified in Sec. 63.1296(b)(1)

and no leak has been detected during those 2 months.

(C) The identification on equipment, other than a valve, may be

removed after it has been repaired.

(ii) The information in paragraphs (b)(2)(ii) (A) through (G) shall

be recorded for leaking components.

(A) The instrument and operator identification numbers and the

equipment identification number.

(B) The date the leak was detected and the dates of each attempt to

repair the leak.

(C) Repair methods applied in each attempt to repair the leak.

(D) The words ``above leak definition'' if the maximum instrument

reading measured by the methods specified in Sec. 63.1296(f) after each

repair attempt is equal or greater than the leak definitions for the

specified equipment.

(E) The words ``repair delayed'' and the reason for the delay if a

leak is not repaired within 15 calendar days after discovery of the

leak.

(F) The expected date of the successful repair of the leak if a

leak is not repaired within 15 days.

(G) The date of successful repair of the leak.

(H) The date the identification is removed.

(c) HAP ABA Records.

(1) Emission Point Specific Limitations--Rolling Annual Compliance

and Monthly Compliance Alternative Records. Each slabstock affected

source complying with the emission point specific limitations of

Secs. 63.1294 through 63.1298, and the rolling annual compliance

provisions of Sec. 63.1297(a)(1), shall maintain the records listed in

paragraphs (c)(1) (i), (ii), (iii), and (iv) of this section. Each

flexible polyurethane foam slabstock source complying with the emission

point specific limitations of Secs. 63.1294 through 63.1298, and the

monthly compliance alternative of Sec. 63.1297(a)(2), shall maintain

the records listed in paragraphs (c)(1) (i), (ii), and (iv) of this

section.

(i) Daily records of the information listed below in paragraphs

(c)(1)(i) (A) through (C) of this section.

(A) A log of foam runs each day, identified by the amount of each

grade produced during the run.

(B) Results of the density and IFD testing for each run of foam,

conducted in accordance with the procedures in Sec. 63.1304(b).

(C) The amount of polyol added to the slabstock foam production

line at the mixhead for each run of foam, determined in accordance with

Sec. 63.1303(b).

(ii) Monthly records of the information listed in paragraphs

(c)(1)(ii) (A) through (E) of this section.

(A) A listing of all foam grades produced during the month,

(B) For each foam grade produced, the residual HAP formulation

limitation, calculated in accordance with Sec. 63.1297(d).

(C) For each foam grade produced, the total amount of polyol used

in the month.

(D) The total allowable HAP ABA emissions for the month, determined

in accordance with Sec. 63.1297(b)(2).

(E) The total amount of HAP ABA added to the slabstock foam

production line at the mixhead during the month, determined in

accordance with Sec. 63.1303(b).

(iii) Each source complying with the rolling annual compliance

provisions of Sec. 63.1297(b) shall maintain the records listed in

paragraphs (c)(1)(iii) (A) and (B) of this section.

(A) The sum of the total allowable HAP ABA emissions for the month

and the previous 11 months.

(B) The sum of the total actual HAP ABA emissions for the month and

the previous 11 months.

(iv) Records of all calibrations for each device used to measure

polyol and HAP ABA added at the mixhead, conducted in accordance with

Sec. 63.1303(b)(3).

(2) Source-Wide Limitations--Rolling Annual Compliance and Monthly

Compliance Alternative Records. Each slabstock affected source

complying with the source-wide limitations of Sec. 63.1299, and the

rolling annual compliance provisions in Sec. 63.1299(a), shall maintain

the records listed in paragraphs (c)(2)(i) through (c)(2)(vii) of this

section. Each flexible polyurethane foam slabstock source complying

with the source-wide limitations of Sec. 63.1299, and the monthly

compliance alternative of Sec. 63.1299(b), shall maintain the records

listed in paragraphs (c)(2)(i) through (c)(2)(iii) and paragraphs

[[Page 68428]]

(c)(2)(v) through (c)(2)(vii) of this section.

(i) Daily records of the information listed in paragraphs (c)(2)(i)

(A) through (C) of this section.

(A) A log of foam runs each day, identified by the grade.

(B) Results of the density and IFD testing for each run of foam,

conducted in accordance with the procedures in Sec. 63.1304(b).

(C) The amount of polyol added to the slabstock foam production

line at the mixhead for each run of foam, determined in accordance with

Sec. 63.1303(b).

(ii) For sources complying with the source-wide emission

limitation, weekly records of the storage tank level, determined in

accordance with Sec. 63.1303(d).

(iii) Monthly records of the information listed in paragraphs

(c)(2)(iii) (A) through (E) of this section.

(A) A listing of all foam grades produced during the month,

(B) For each foam grade produced, the residual HAP formulation

limitation, calculated in accordance with Sec. 63.1297(d).

(C) For each foam grade produced, the total amount of polyol used

in the month.

(D) The total allowable HAP ABA and equipment cleaning emissions

for the month, determined in accordance with Sec. 63.1297(b)(2).

(E) The total actual source-wide HAP ABA emissions for the month,

determination in accordance with Sec. 63.1299(c)(1), along with the

information listed in paragraphs (c)(2)(iii)(E) (1) and (2) of this

section.

(1) The amounts of HAP ABA in the storage vessel at the beginning

and end of the month, determined in accordance with Sec. 63.1299(c)(2);

and

(2) The amount of each delivery of HAP ABA to the storage vessel,

determined in accordance with Sec. 63.1299(c)(3).

(iv) Each source complying with the rolling annual compliance

provisions of Sec. 63.1299(a) shall maintain the records listed in

paragraphs (c)(2)(iv) (A) and (B) of this section.

(A) The sum of the total allowable HAP ABA and equipment cleaning

HAP emissions for the month and the previous 11 months.

(B) The sum of the total actual HAP ABA and equipment cleaning HAP

emissions for the month and the previous 11 months.

(v) Records of all calibrations for each device used to measure

polyol added at the mixhead, conducted in accordance with

Sec. 63.1303(b)(3).

Table 1 to Subpart III.--Applicability of General Provisions (40 CFR

Part 63, Subpart A) to Subpart III

------------------------------------------------------------------------

Applies to subpart

Subpart A reference III Comment

------------------------------------------------------------------------

Sec. 63.1.............. Yes.................. Except that Sec.

63.1(c)(2) is not

applicable since area

sources are not

subject to subpart

III.

Sec. 63.2.............. Yes..................

Sec. 63.3.............. Yes..................

Sec. 63.4.............. Yes..................

Sec. 63.5.............. Yes..................

Sec. 63.6.............. Yes.................. Except that Sec.

63.6(h) is not

applicable since

subpart III does not

require opacity and

visible emission

standards.

Sec. 63.7.............. No................... Performance tests not

required by subpart

III.

Sec. 63.8.............. No................... Continuous monitoring,

as defined in subpart

A, is not required by

subpart III.

Sec. 63.9(a)-(d)....... Yes..................

Sec. 63.9(e)-(g)....... No...................

Sec. 63.9(h)........... No................... Subpart III specifies

Notification of

Compliance Status

requirements.

Sec. 63.9(i)-(j)....... Yes..................

Sec. 63.10(a)-(b)...... Yes.................. Except that the records

specified in Sec.

63.10(b)(2) (vi)

through (xiv) are not

required.

Sec. 63.10(c).......... No...................

Sec. 63.10(d)(1)....... Yes..................

Sec. 63.10(d) (2)-(3).. No...................

Sec. 63.10(d) (4)-(5).. Yes..................

Sec. 63.10(e).......... No...................

Sec. 63.10(f).......... Yes..................

Sec. 63.11............. Yes..................

Sec. 63.12............. Yes..................

Sec. 63.13............. Yes..................

Sec. 63.14............. Yes..................

Sec. 63.15............. Yes..................

------------------------------------------------------------------------

[FR Doc. 96-32237 Filed 12-26-96; 8:45 am]

BILLING CODE 6560-50-M