RULES AND REGULATIONS
Title 25--ENVIRONMENTAL PROTECTION
ENVIRONMENTAL QUALITY BOARD
[25 PA. CODE CHS. 121 AND 129]
Solvent Cleaning Operations
[31 Pa.B. 6921] The Environmental Quality Board (Board) amends §§ 121.1 and 129.63 (relating to definitions; and VOC cleaning operations) to read as set forth in Annex A.
The final-form rulemaking adds and revises definitions for terms in Chapter 121 (relating to general provisions) that are used in the substantive sections of Chapter 129 (relating to standards for sources). A new § 129.63 replaces the current § 129.63 to update equipment requirements for solvent cleaning machines to make the requirements consistent with current technology. In addition, the operating requirements in § 129.63 are revised to specify improved operating practices. The final-form rulemaking also specifies volatility limits for solvents used in cold cleaning machines.
This order was adopted by the Board at its meetings of September 18, 2001, and October 16, 2001.
A. Effective Date
These amendments will be effective upon publication in the Pennsylvania Bulletin as final-form rulemaking.
B. Contact Persons
For further information, contact Terry Black, Chief, Regulation and Policy Development Section, Division of Compliance Enforcement, Bureau of Air Quality, 12th Floor, Rachel Carson State Office Building, P. O. Box 8468, Harrisburg, PA 17105-8468, (717) 787-1663; or R. A. Reiley, Assistant Counsel, Bureau of Regulatory Counsel, Office of Chief Counsel, 9th Floor, Rachel Carson State Office Building, P. O. Box 8464, Harrisburg, PA 17105-8464, (717) 787-7060.
C. Statutory Authority
This action is being taken under the authority of section 5 of the Air Pollution Control Act (APCA) (35 P. S. § 4005) which grants the Board the authority to adopt regulations for the prevention, control, reduction and abatement of air pollution.
D. Background of the Amendments
The purpose of this final-form rulemaking is to reduce volatile organic compounds (VOCs) emitted from solvent cleaning operations. This final-form rulemaking is a part of the Commonwealth's plan to achieve and maintain the National Ambient Air Quality Standard (NAAQS) for ozone in this Commonwealth. These recommendations were supported by the Reading-Lehigh Valley and Southcentral Ozone Stakeholder Groups, which met subsequent to the proposed rulemaking. The final-form rulemaking is based on the recommendations of the Southwest and Southeast Pennsylvania Ozone Stakeholders Working Groups, which recommended that the Department of Environmental Protection (Department) revise the requirements relating to use of solvents for cleaning of parts in order to reduce emissions of ozone precursors.
The final-form rulemaking revises requirements for the operation of solvent cleaning machines. In general, industry uses two types of solvent cleaning machines--vapor and cold cleaning. Based on available inventory data and information, the Department estimates that there are fewer than 100 vapor machines and over 71,000 cold cleaning machines in this Commonwealth. Solvent cleaning machines are used in a variety of settings including auto repair facilities, manufacturing operations and maintenance shops at commercial, industrial and institutional facilities. These requirements only apply to those operations that use solvents containing greater than 5% VOC content by weight for the cleaning of metal parts. In addition, the final-form rulemaking exempts solvent cleaning machines that are subject to the Federal Maximum Achievable Control Technology (MACT).
The final-form rulemaking provides operators of solvent cleaning machines a choice of compliance options for meeting the requirements of this final-form rulemaking. In general, owners and operators of affected solvent cleaning machines can either implement a program using low volatility solvents or they can assure that the affected units meet specific hardware requirements. These compliance options will reduce the evaporative loss of solvents, which will improve air quality and reduce operating costs.
The final-form rulemaking is based, in part, on the recommendations of a separate, technical workgroup formed to consider the recommendations of the Southeast and Southwest Ozone Stakeholder Working Groups. These groups consisted of representatives of the major equipment and solvent suppliers, the automotive service industry, environmental groups and regulatory agencies. The final-form rulemaking was developed taking into account technology, environmental, economic and enforcement considerations. These groups also believe that the best way to implement the amendments is through an outreach and education program to the users of solvent cleaning equipment, particularly small businesses.
Some of the VOC control requirements in the final-form rulemaking are more stringent than the control requirements in the Federal Control Techniques Guidelines issued in November 1977. Both the technical workgroup and the stakeholders determined that these revised control requirements were necessary for solvent cleaning operations to enable the Commonwealth to attain and maintain the ozone NAAQS.
Specifically, the final-form rulemaking includes requirements adopted in the Federal MACT standard for solvent cleaning operations utilizing nonhazardous air pollutant VOC solvents, as well as hazardous air pollutant (HAP) VOC solvents. The final-form rulemaking will discourage operators from converting to non-HAP VOC solvents to avoid the more stringent MACT requirements, which could adversely affect air quality.
The Department worked with the Air Quality Technical Advisory Committee (AQTAC) in the development of the final-form rulemaking. At its May 24, 2001, meeting, AQTAC discussed certain provisions related to mandatory operating requirements for cold cleaners. These provisions related to the specified minimum requirements for draining of parts, location of work area fans and the operation of pump agitators in solvent baths. AQTAC concluded that these provisions were too subjective to be included as enforceable regulations. Therefore, these provisions were deleted from the final-form rulemaking, but will be included in outreach information as suggestions for operators to minimize emissions.
E. Summary of Regulatory Revisions
The final-form rulemaking amends Chapter 121 by adding and revising definitions of the terms used in the substantive provisions of Chapter 129. The new definitions include: ''airless cleaning system,'' ''airtight cleaning system,'' ''batch vapor cleaning machine,'' ''carbon adsorber,'' ''cold cleaning machine,'' ''dwell,'' ''dwell time,'' ''extreme cleaning service,'' ''freeboard refrigeration device,'' ''idling mode,'' ''immersion cold cleaning machine,'' ''in-line vapor cleaning machine,'' ''reduced room draft,'' ''remote reservoir cold cleaning machine,'' ''solvent/air interface,'' ''solvent cleaning machine,'' ''solvent cleaning machine automated parts handling system,'' ''solvent cleaning machine down time,'' ''solvent vapor zone,'' ''superheated vapor system,'' ''vapor cleaning machine,'' ''vapor cleaning machine primary condenser,'' ''vapor pressure,'' ''vapor up control switch'' and ''working mode cover.'' The amended definition includes ''freeboard ratio.'' The definition of ''solvent cleaning machine idle time'' is deleted. Proposed revisions to the definition of ''hand-wipe cleaning operation'' are deleted in the final-form rulemaking.
Except for those machines subject to the Federal National Emission Standard for Hazardous Air Pollutants (NESHAP) for halogenated solvent cleaners under 40 CFR Part 63, the changes to § 129.63(a)--(c) and the addition of § 129.63(d) apply to cold cleaning machines, batch vapor cleaning machines, in-line vapor cleaning machines, airless cleaning machines and airtight cleaning machines that use solvents containing greater than 5% VOC content by weight to process metal parts. The final-form rulemaking updates equipment requirements for these solvent cleaning machines to make the equipment requirements consistent with current technology. These equipment specifications are consistent with the Federal MACT requirements for solvent cleaning machines. However, as described in Section D of this Preamble, the final-form rulemaking is, in part, more stringent than the control requirements in the Federal Control Techniques Guidelines. Finally, § 129.63(e) specifies volatility limits for solvents in certain cleaning machines. There are no Federal volatility limits for solvents.
Specifically, § 129.63(a) applies to cold cleaning machines. However, certain types of operations are exempt from some of the amendments, like cold cleaning machines used in extreme cleaning service and when compliance would result in unsafe operating conditions.
Section 129.63(b) applies to batch vapor cleaning machines.
Section 129.63(c) applies to in-line vapor cleaning machines.
Section 129.63(d) applies to airless cleaning machines and airtight cleaning machines.
Section 129.63(e) provides alternative provisions for solvent cleaning machines and requires operators to maintain compliance records.
The final-form rulemaking will be submitted to the Environmental Protection Agency (EPA) as an amendment to the State Implementation Plan (SIP).
F. Comments and Responses
Following publication of proposed rulemaking at 29 Pa.B. 4661 (August 28, 1999), the Board received comments from 21 commentators including the Independent Regulatory Review Commission (IRRC). A summary of the comments and responses follows.
One commentator thought that it may be difficult for operators to find suitable, low volatility, replacement solvents, and if they are available, they may be costly and result in production inefficiencies and quality problems.
The Board understands this concern, and the final-form rulemaking provides operators a choice of compliance options for cold cleaners. Operators of affected cold cleaners can either implement a program using low volatility solvents or they can assure that the affected unit meets specific hardware requirements. For most, if not all applications, however, low volatility solvents and aqueous cleaning systems can provide acceptable cleaning at an acceptable or reasonable cost, which will alleviate cost, production and quality problems. In addition, the final-form rulemaking exempts machines that are subject to the Federal MACT.
Several commentators believed that the proposed rulemaking was too broad since it extends the Federal MACT standard to all solvent cleaning operations, including those using non-HAP VOC solvents and non-VOC solvents. In addition, the commentators noted that the Board has not demonstrated that these provisions, which are more restrictive than the Federal requirements, are necessary to attain the NAAQS. This is contrary to Executive Order 1996-1 and section 4.2 of the APCA (35 P. S. § 4004.2).
The Board, in part, agrees. The final-form rulemaking applies only to those solvent cleaning machines using VOCs in the cleaning solvent. The final-form rulemaking does not apply to aqueous cleaning systems or to other cleaning systems using compounds listed by the EPA as exempt by the Administrator of the EPA. However, the Board believes that it is necessary to have essentially the same level of control requirements for vapor cleaning machines using non-HAP VOC solvents as for HAP VOC solvents. Lower levels of control requirements for non-HAP VOC machines could result in switching from non-VOC HAP solvents to non-HAP VOCs with the resulting potential for increased ozone formation. While the final-form rulemaking is, in part, more stringent than Federal requirements, the emission reductions that will result from this final-form rulemaking are a significant part of the Commonwealth's efforts to continue toward attainment and maintenance of the health-based NAAQS for ozone throughout this Commonwealth. As a result, this final-form rulemaking is neither contrary to Executive Order 1996-1 nor to section 4.2 of the APCA.
One commentator felt there was no supporting information to justify extending the requirements of the revised solvent cleaning limits beyond areas designated as moderate or severe ozone nonattainment with the 1-hour NAAQS. This final-form rulemaking has been designed not only to achieve but to maintain the ozone standard throughout this Commonwealth. In addition, with over 75,000 solvent cleaning machines throughout this Commonwealth, the Board has determined that to limit the final-form rulemaking to the Southeastern and Southwestern regions only would be inequitable since it would leave businesses in those regions at a competitive disadvantage.
One commentator thought that the definition of ''solvent'' was too broad and should not include non-VOC compounds that are exempted under the EPA's definition of VOC. Since this proposed rulemaking is to address ozone air quality issues, it did not seem reasonable to impose additional control requirements on materials that do not contribute to the ozone problem. Non-VOC cleaners should be exempt from the requirements.
The Board agrees. The final-form rulemaking has been revised to apply only to solvent cleaning machines using cleaning solvents that contain VOCs. As a result, the definition of ''solvent cleaning machine'' does not include non-VOC compounds.
One commentator believed the requirements of the provisions for cold cleaners should be limited to machines used for the removal of grease or contaminants, and should not extend to the removal of coatings and materials, such as photoresist, used in the electronics industry.
The Board agrees. The definition of ''solvent cleaning machine'' has been revised in the final-form rulemaking by removing the reference to removal of coatings. Removal of coatings, such as photoresist, is not considered solvent cleaning for purposes of this final-form rulemaking.
Another commentator felt the provisions related to cold cleaning should be limited to the cleaning of metal parts. The Board agrees. The final-form rulemaking has been revised to apply only to the cleaning of metal parts.
One commentator believed that there should be a de minimis threshold for solvent cleaning machines. The Board agrees. The final-form rulemaking establishes a de minimis threshold for cold cleaning operations that contain 2 gallons or more of VOC solvents.
Another commentator believed the 10 square foot de minimis applicability criteria in the existing regulation should be retained because these machines do not generate significant emissions. The Board disagrees. The sheer number of small cold cleaning solvent units and the aggregate mass of emissions from these machines, based on emission factor estimates, indicates a need for measures to reduce emissions from smaller sources. In addition, the emission reductions techniques for cold cleaners, in many cases, have been implemented. The operators of small vapor cleaning machines may implement one of several compliance options or they may demonstrate that emissions meet an alternative emission limit as set forth in the regulation.
One commentator believed that the proposed rulemaking should be no more stringent than the MACT for cold cleaners and allow the use of the six halogenated solvents covered by the MACT. The Board agrees. The final-form rulemaking allows the use of solvents that exceed the 1.0 mm Hg volatility limit, if the cold cleaning machine has a freeboard ratio of 0.75 or greater.
One commentator felt the final-form rulemaking should exempt cold cleaning machines that are covered by the MACT. In addition, MACT requirements should not be mandated for machines using non-HAP VOC solvents.
The Board, in part, agrees. Cold cleaning machines that use non-VOC solvents are not covered by the final-form rulemaking. However, machines using HAP or non-HAP solvents that are also VOCs are subject to the final-form rulemaking. The Board believes that it is necessary to have essentially the same level of control requirements for vapor cleaning machines using non-HAP VOC solvents as for HAP VOC solvents. Lower levels of control requirements for non-HAP VOC solvent machines could result in switching from non-VOC HAP solvents to VOC solvents, with the resulting potential for increased ozone formation. In addition, the final-form rulemaking has been revised to specify that cold cleaning machines subject to the MACT are exempt from § 129.63.
Another commentator thought the requirement to dispose of hand-wipe cleaning rags into closed containers will prohibit air-drying of rags and increase disposal costs, particularly for small businesses.
The Board agrees. While the Board is concerned that the practice of ''air drying'' of solvent cleaning rags will result in the emissions of HAPs and VOCs, the Board also does not believe that imposing regulatory requirements to prohibit this practice is the best approach to the issue, and has deleted the requirement from the final-form rulemaking, except for aerospace operations. Hand-wipe cleaning rags in aerospace operations have been subject to requirements to store solvent-laden rags in closed containers under existing requirements, and these will be retained. For other hand-wipe activities, the Board encourages, but will not require, operators to implement pollution prevention programs, including use of non-VOC and non-HAP solvents for hand-wipe cleaning.
Several commentators believed that the Board's calculation of the VOC reductions and program implementation costs are flawed. The majority of the VOC losses from cold cleaners are from drag-out and not from standing losses. Reducing the volatility of the solvent will not significantly reduce the drag-out of solvents on parts. It will only increase the parts drying time and may reduce production efficiency.
The Board disagrees. Based on information developed by Maryland and incorporated into an SIP revision approved by the EPA, the Board believes that the emission reductions predicted are accurate and applicable to this Commonwealth. Costs of compliance for cold cleaning machines may, in fact, be overstated. Suppliers of solvents and machines have indicated that a significant segment of the industry has already changed solvent blends and that much of the solvent in use meets the 1 mm Hg volatility limit. These amendments were made to facilitate compliance with other requirements, including those related to hazardous material transport. Therefore, the costs that were predicted for changing to low volatility solvents have in many cases already been imposed and would continue regardless of the 1 mm Hg volatility limit.
One commentator thought the requirement for a freeboard ratio of 0.75 or greater for immersion cold cleaners will result in the replacement of a large number of serviceable cold cleaning machines at great cost to industry. The final-form rulemaking should adopt a size limitation for the applicability of the 0.75 freeboard ratio. Alternatively, the final-form rulemaking should specify a freeboard ratio of 0.50 for all immersion cold cleaning machines.
The Board disagrees. The final-form rulemaking allows operators of cold cleaning machines the option of using low volatility (1 mm Hg) solvents in a machine with a freeboard ration of 0.5 or greater. A freeboard ratio of 0.75 or greater is required only if the solvent volatility is greater than 1 mm Hg. As a result, there will not be high costs for replacement since operators have compliance options.
Several commentators believed the provisions should provide an exemption for certain electronics manufacturing operations because low solvents are not available to meet the cleaning needs for production of silicon wafers used for semiconductors.
The Board agrees. The final-form rulemaking applies only to the cleaning of contaminants from metal parts. Therefore, removal of contaminants such as photoresist, during the production of silicon wafers, is not subject to the final-form rulemaking.
One commentator felt the use of low vapor pressure solvents created a substantial risk if residual solvents are exposed to reactive atmospheres. An exception should be made to the volatility requirements in the regulation if there are compelling health and safety reasons.
The Board agrees. The final-form rulemaking specifies safety related exemptions. Cold cleaning machines used in extreme cleaning service, such as highly reactive or corrosive atmospheres, are exempt from the solvent volatility requirements. In addition, if the owner or operator of the cold cleaning machine demonstrates that compliance with the volatility requirements will result in unsafe operating conditions, an exemption can be granted by the Department.
One commentator felt the final-form rulemaking should exempt halogenated solvent cleaning machines provided the solvent cleaning machine is subject to the Federal NESHAP, under 40 CFR Part 63.
The Board agrees. The final-form rulemaking has been revised to provide this exemption for all cleaning machines subject to the Federal NESHAP.
One commentator felt the proposed rulemaking did not discuss the impacts of the final-form rulemaking and applicability levels of the Department's plan approval and permitting process. Major sources will be subject to reasonably available control technologies (RACT), Title V and perhaps the NESHAP.
The current regulations exempt certain sources and classes of sources from plan approval and permitting requirements for a number of reasons, including insignificant levels of emissions. The final-form rulemaking will not alter those determinations already made under § 127.14(a)(8) (relating to exemptions). If an existing source is large enough to be considered a major source, the source could be affected by other programs such as RACT, Title V and the NESHAP. The final-form rulemaking will affect those determinations.
A commentator indicated that the final-form rulemaking will become Federally enforceable as part of the SIP and that the requirements must be included in the Title V permit. That would pose compliance certification problems because of the sweeping nature of the requirements.
The Board disagrees. Whether or not the regulations are part of the SIP, the requirements will be included in the Title V permit, and the operator will be required to certify compliance. However, the final-form rulemaking contains a number of revisions that should minimize the compliance certification concerns. Among these are the establishment of a de minimis level of 2 gallons for cold cleaners and limiting the final-form rulemaking's applicability to the cleaning of metal parts.
One commentator believed the Board has not explained the implications of the final-form rulemaking for permitted sources.
The establishment of these requirements will impact only those sources with Title V permits that have more than 3 years remaining in the life of the permit. The Department will develop a program to minimize the impact on the facilities that are affected. The revisions do not specifically require permitting activities.
One commentator felt the Board has not identified any nonregulatory alternatives to this final-form rulemaking or explained why it disagrees with the EPA's conclusion that existing regulations are adequate to protect the public health.
The Board has determined that the emission reductions that will result from this final-form rulemaking are a significant component of the Commonwealth's strategy to continue toward attainment and maintenance of the health-based NAAQS for ozone throughout this Commonwealth. Although certain of the requirements in the final-form rulemaking may be met through voluntary measures, for the emission reductions to be creditable in the SIP, there must be an enforceable program to assure that they are permanent.
One commentator felt the Board has not described a compelling public interest that demanded stronger regulation than the current Federal standards.
The Board disagrees. Much of this Commonwealth is in nonattainment with the health-related NAAQS for ozone. Reductions of the precursors of ozone formation, VOC and oxides of nitrogen are necessary to move the Commonwealth toward attainment and maintenance of the health-related standard. Attaining and maintaining the ambient ozone standard will reduce the incidence of respiratory problems in susceptible individuals, the young, asthmatics, the elderly and those with preexisting respiratory problems. In addition, the emission reductions that will result from this final-form rulemaking are a significant component of the Commonwealth's strategy to continue toward attainment and maintenance of the health-based NAAQS for ozone throughout this Commonwealth.
One commentator felt the proposed language of § 129.63 varied from the comparable Federal provisions in 40 CFR 63.463 (relating to batch vapor and in-line cleaning standards). The Department should either conform its requirements to the Federal requirements or adopt the Federal NESHAP by reference.
The Board agrees. The final-form rulemaking exempts from the requirements of § 129.63 those machines subject to the Federal MACT. Therefore, there are no inconsistent provisions applicable to solvent cleaning machines.
One commentator thought the Board had not identified the outreach efforts it will use to assist in the implementation of the requirements.
The Board has found that because most of the affected solvent cleaning machines are located at small businesses such as automotive repair facilities, the Department will work closely with the Small Business Compliance Assistance Program to alert these operators. In addition, because many of these machines are installed and operated under contract with service providers, the Department will coordinate its outreach efforts closely with these businesses.
One commentator felt the Board had not identified the emission reductions that will result from the implementation of the final-form rulemaking.
The EPA emission factor estimates indicate that unregulated emissions from cold cleaning activities from facilities such as automobile repair facilities, where small cold cleaning units predominate, and from manufacturing cold cleaning are approximately 3.6 pounds per person per year. Based on an estimated population of 12.1 million and this emission factor, unregulated emissions are estimated to be 21,780 tons per year Statewide. Based on determinations of emission reduction benefits of approximately 66% resulting from reduced solvent volatility for the Maryland SIP approved by the EPA, the Board estimates that the requirements will result in enforceable emission reductions of approximately 14,375 tons per year Statewide.
One commentator believed the Board had not explained why the proposed rulemaking requirements deviated from the Federal MACT.
The Board did not intend for the requirements in the proposed rulemaking to deviate from or conflict with the Federal MACT. The final-form rulemaking has been revised to exempt from the requirements in § 129.63 any solvent cleaning units subject to the Federal MACT.
One commentator felt the Board should assure that the final-form rulemaking addressed situations when low volatility solvents or the specified compliance options are not viable options for solvent cleaning machines.
The Board agrees. The final-form rulemaking provides operators of affected cold cleaning machines the option of using low volatility solvent, or increasing the freeboard ratio for the machine to 0.75 or greater. In addition, affected facilities have the option of demonstrating that an alternative program is as effective as the regulation under the equivalency provisions in § 129.51 (relating to general). Operators of cold cleaning machines subject to the Federal MACT are not affected by the requirements of § 129.63.
One commentator provided cost data related to development of alternative solvent programs for a number of the company's facilities. These facilities are involved in printing and surface coating operations. The company estimated total development costs of approximately $500,000 with an estimated $220,000 in annual operating costs if the company's facilities are affected by the requirements.
The Board has determined that several changes made in the final-form rulemaking will minimize the potential cost impact to the regulated community, including the operations at the commentator's facilities. The final-form rulemaking has been revised to apply only to the removal of oils, waxes, greases and soils from metal parts where VOCs are used. It does not apply to the removal of coatings and inks. In addition, the final-form rulemaking exempts operations that are subject to the Federal NESHAP for solvent cleaning. The provisions of § 129.51 allow an operator the option of developing an alternative compliance plan. The final-form rulemaking also provides exemptions based on safety considerations.
One commentator believed the requirements for recordkeeping regarding the volatility of cold cleaning solvents are redundant and should be eliminated.
The Board disagrees. The requirements for maintenance of the documentation regarding solvent volatility are retained in the final-form rulemaking. If the operator can retain the Material Safety Data Sheet on file for the solvent in use, that will be satisfactory for demonstration of compliance.
One commentator thought the Board should revise the definition of ''remote reservoir cold cleaning machine'' to include certain machines that drain solvent into a covered container.
The Board agrees. The definition of ''remote reservoir cold cleaning machine'' has been revised in the final-form rulemaking to include the phrase suggested by the commentator.
One commentator thinks the Board should consider changing the title of the requirements to more accurately describe the section of the regulations.
The Board disagrees. The title of the section has been retained in the final-form rulemaking because the provisions could potentially relate to both VOC and non-VOC materials, especially as they relate to HAPs.
One commentator felt the definition of ''freeboard ratio'' should be changed to be consistent with the definition in the MACT.
The Board agrees. The definition of ''freeboard ratio'' has been revised in the final-form rulemaking to be consistent with the MACT definition.
One commentator thought that the phrase ''or that heats the solvent'' in the definition of the term ''vapor cleaning machine'' is inconsistent with the Federal definition.
The Board agrees. The technical stakeholders who worked to formulate the rulemaking suggested the proposed definition. In the final-form rulemaking, the definition is revised to be consistent with the Federal MACT definition.
Another commentator indicated that the definitions of ''dwell'' and ''dwell time'' are inconsistent and should be clarified in the final-form rulemaking.
The Board agrees. These terms have been clarified in the final-form rulemaking.
G. Benefits, Costs and Compliance
Executive Order 1996-1 requires a cost benefit analysis of the final-form rulemaking.
Benefits
Overall, the citizens of this Commonwealth will benefit from the final-form rulemaking because it will result in improved air quality by reducing ozone precursor emissions, recognize and encourage pollution prevention practices and encourage new technologies and practices which reduce emissions. Moreover, it is estimated that the final-form rulemaking will save industry approximately $7.3 million the first year and $14.6 million annually thereafter Statewide.
Compliance Costs
The final-form rulemaking will slightly increase the operating costs of industry. However, the cost increase will be offset by the reduced evaporative loss of solvent which will result from the lower volatility, thereby reducing the need to purchase additional solvent.
Compliance Assistance Plan
The Department plans to educate and assist the public and the regulated community with understanding the newly revised requirements and how to comply with them. This will be accomplished through the Department's ongoing regional compliance assistance program.
Paperwork Requirements
The final-form rulemaking will not increase the paperwork that is already generated during the normal course of business operations.
H. Sunset Review
The final-form rulemaking will be reviewed in accordance with the sunset review schedule published by the Department to determine whether the regulations effectively fulfill the goals for which they were intended.
I. Regulatory Review
Under section 5(a) of the Regulatory Review Act (71 P. S. § 745.5(a)), on August 17, 1999, the Department submitted a copy of the notice of proposed rulemaking published at 29 Pa.B. 4661 to IRRC and to the Chairpersons of the Senate and House Environmental Resources and Energy Committees for review and comment.
Under section 5(c) of the Regulatory Review Act, IRRC and the Committees were provided with copies of the comments received during the public comment period, as well as other documents when requested. In preparing this final-form rulemaking, the Department has considered the comments received from IRRC, the Committees and the public.
Under section 5.1(d) of the Regulatory Review Act (71 P. S. § 745.5a(d)), on November 8, 2001, this final-form rulemaking was deemed approved by the House and Senate Committees. Under section 5.1(e) of the Regulatory Review Act, IRRC met on November 15, 2001, and approved the final-form rulemaking.
J. Findings
The Board finds that:
(1) Public notice of proposed rulemaking was given under sections 201 and 202 of the act of July 31, 1968 (P. L. 769, No. 240) (45 P. S. §§ 1202 and 1202) and regulations promulgated thereunder in 1 Pa. Code §§ 7.1 and 7.2.
(2) A public comment period was provided as required by law and all comments were considered.
(3) These final-form regulations do not enlarge the purpose of the proposal published at 29 Pa.B. 4661.
(4) These final-form regulations are necessary and appropriate for administration and enforcement of the authorizing acts identified in Section C of this Preamble and are reasonably necessary to achieve and maintain the NAAQS for ozone.
K. Order
The Board orders that:
(a) The regulations of the Department, 25 Pa. Code Chapters 121 and 129, are amended by amending §§ 121.1 and 129.63 to read as set forth in Annex A, with ellipses referring to the existing text of regulations.
(b) The Chairperson of the Board shall submit this order and Annex A to the Office of General Counsel and the Office of Attorney General for review and approval as to legality and form, as required by law.
(c) The Chairperson shall submit this order and Annex A to IRRC and the Senate and House Environmental Resources and Energy Committees as required by the Regulatory Review Act.
(d) The Chairperson of the Board shall certify this order and Annex A and deposit them with the Legislative Reference Bureau as required by law.
(e) These final-form regulations are effective upon publication in the Pennsylvania Bulletin.
DAVID E. HESS,
Chairperson(Editor's Note: For the text of the order of the Independent Regulatory Review Commission relating to this document, see 31 Pa.B. 6587 (December 1, 2001).)
Fiscal Note: Fiscal Note 7-346 remains valid for the final adoption of the subject regulations.
Annex A
TITLE 25. ENVIRONMENTAL PROTECTION
PART I. DEPARTMENT OF ENVIRONMENTAL PROTECTION
Subpart C. PROTECTION OF NATURAL RESOURCES
ARTICLE III. AIR RESOURCES
CHAPTER 121. GENERAL PROVISIONS § 121.1. Definitions.
The definitions in section 3 of the act (35 P. S. § 4003) apply to this article. In addition, the following words and terms, when used in this article, have the following meanings, unless the context clearly indicates otherwise:
* * * * * Airless cleaning system--A solvent cleaning machine that is automatically operated and seals at a differential pressure of 0.50 pounds per square inch gauge (psig) or less, prior to the introduction of solvent or solvent vapor into the cleaning chamber and maintains differential pressure under vacuum during all cleaning and drying cycles.
* * * * * Airtight cleaning system--A solvent cleaning machine that is automatically operated and seals at a differential pressure no greater than 0.50 psig, prior to the introduction of solvent or solvent vapor into the cleaning chamber and during all cleaning and drying cycles.
* * * * * Batch vapor cleaning machine--
(i) A vapor cleaning machine in which individual parts or a set of parts move through the entire cleaning cycle before new parts are introduced into the cleaning machine.
(ii) The term includes solvent cleaning machines, such as ferris wheel cleaners or cross rod machines, that clean multiple loads simultaneously and are manually loaded.
(iii) The term does not include machines which do not have a solvent/air interface, such as airless and airtight cleaning systems.
* * * * * Carbon adsorber--A bed of activated carbon into which an air/solvent gas-vapor stream is routed and which absorbs the solvent on the carbon.
* * * * * Cold cleaning machine--
(i) A device or piece of equipment, containing or using nonboiling liquid which contains greater than 5% VOC or hazardous air pollutant (HAP) by weight, into which parts are placed to remove dirt, grease or oil from the surfaces of the parts or to dry the parts.
(ii) The term does not include machines which do not have a solvent/air interface, such as airless and airtight cleaning systems.
* * * * * Dwell--The holding of metal parts within the freeboard area of a solvent cleaning machine above the solvent vapor zone to allow solvent to drain from the parts or parts baskets back into the solvent cleaning machine.
Dwell time--The period of time between when a parts basket is placed in the solvent vapor zone of a batch vapor or in-line vapor cleaning machine and when solvent dripping ceases.
* * * * * Extreme cleaning service--The use of a cold cleaning machine to clean parts used in the manufacture of the following gases or to clean parts exposed to these gases in manufacturing, production, research and development, analytical work, or other similar operations:
(i) Oxygen in concentrations greater than 23%.
(ii) Ozone
(iii) Nitrous oxide.
(iv) Fluorine.
(v) Chlorine.
(vi) Bromine.
(vii) Halogenated compounds.
* * * * * Freeboard ratio--
(i) For a cold cleaning machine or batch vapor cleaning machine, the distance from the liquid solvent in the idling mode to the top edge of the cleaning machine divided by the smaller dimension of the cleaning machine.
(ii) For an operating in-line vapor cleaning machine, the distance from the solvent/air interface to the bottom of the entrance or exit opening, whichever is lower, as measured during the idling mode.
Freeboard refrigeration device--A set of secondary coils mounted in the freeboard area of a solvent cleaning machine that carries a refrigerant or other chilled substance to provide a chilled air blanket above the solvent vapor. A solvent cleaning machine primary condenser which is capable of maintaining a temperature in the center of the chilled air blanket at not more than 30% of the solvent boiling point is both a primary condenser and a freeboard refrigeration device.
* * * * * Idling mode--The time period when a solvent cleaning machine is not actively cleaning metal parts and the sump heating coils, if present, are turned off.
Immersion cold cleaning machine--An open top cold cleaning machine in which the parts are immersed in the solvent when being cleaned.
* * * * * In-line vapor cleaning machine--A vapor cleaning machine that uses an automated parts handling system, typically a conveyor, to automatically provide a supply of parts to be cleaned. In-line vapor cleaning machines are fully enclosed except for the conveyor inlet and exit portals.
* * * * * Reduced room draft--Decreasing the flow or movement of air across the top of the freeboard area of a solvent cleaning machine to less than 50 feet per second (15.2 meters per second) by methods including:
(i) Redirecting fans or air vents, or both.
(ii) Moving a machine to a corner where there is less room draft.
(iii) Constructing a partial or complete enclosure.
* * * * * Remote reservoir cold cleaning machine--A machine in which liquid solvent is pumped to a sink-like work area that immediately drains solvent back into an enclosed container or beneath a solvent cover while parts are being cleaned, allowing no solvent to pool in the work area.
* * * * * Solvent/air interface--For a vapor cleaning machine, the location of contact between the concentrated solvent layer and the air. This location of contact is the midline height of the primary condenser coils. For a cold cleaning machine, the location of contact between the liquid solvent and the air.
Solvent cleaning machine--
(i) A device or piece of equipment that uses solvent liquid or vapor to remove contaminants, such as dirt, grease and oil from the surfaces of materials.
(ii) Types of solvent cleaning machines include:
(A) Batch vapor cleaning machines.
(B) In-line vapor cleaning machines.
(C) Immersion cold cleaning machines.
(D) Remote reservoir cold cleaning machines.
(E) Airless cleaning systems.
(F) Air-tight cleaning systems.
Solvent cleaning machine automated parts handling system--A mechanical device that carries all parts and parts baskets at a controlled speed from the initial loading of soiled or wet parts through the removal of the cleaned or dried parts.
Solvent cleaning machine down time--The period when a solvent cleaning machine is not cleaning parts and the sump heating coils, if present, are turned off.
Solvent vapor zone--For a vapor cleaning machine, the area that extends from the liquid solvent surface to the level that solvent vapor is condensed. This level is defined as the midline height of the primary condenser coils.
* * * * * Superheated vapor system--A system that heats the solvent vapor to a temperature 10° F above the solvent's boiling point. Parts are held in the superheated vapor before exiting the machine to evaporate the liquid solvent on the parts.
* * * * * Vapor cleaning machine--
(i) A solvent cleaning machine that boils liquid solvent, generating a vapor that is used as part of the cleaning or drying cycle.
(ii) The term does not include machines which do not have a solvent/air interface, such as airless and air-tight cleaning systems.
Vapor cleaning machine primary condenser--A series of circumferential cooling coils on a vapor cleaning machine through which a chilled substance is circulated or recirculated to provide continuous condensation of rising solvent vapors, thereby creating a concentrated vapor zone.
* * * * * Vapor pressure--The pressure exerted by a vapor in equilibrium with its solid or liquid phase.
* * * * * Vapor up control switch--A thermostatically controlled switch which shuts off or prevents condensate from being sprayed when there is no vapor. On in-line vapor cleaning machines, the switch also prevents the conveyor from operating when there is no vapor.
* * * * * Working mode cover--A cover or solvent cleaning machine design that allows the cover to shield the cleaning machine openings from outside air disturbances while parts are being cleaned in the cleaning machine. A cover that is used during the working mode is opened only during parts entry and removal.
* * * * *
CHAPTER 129. STANDARDS FOR SOURCES
SOURCES OF VOCs § 129.63. VOC cleaning operations.
(a) Cold cleaning machines. Except for those subject to the Federal National emissions standards for hazardous air pollutants (NESHAP) for halogenated solvent cleaners under 40 CFR Part 63 (relating to National emission standards for hazardous air pollutants for source categories), this subsection applies to cold cleaning machines that use 2 gallons or more of solvents containing greater than 5% VOC content by weight for the cleaning of metal parts.
(1) Immersion cold cleaning machines shall have a freeboard ratio of 0.50 or greater.
(2) Immersion cold cleaning machines and remote reservoir cold cleaning machines shall:
(i) Have a permanent, conspicuous label summarizing the operating requirements in paragraph (3). In addition, the label shall include the following discretionary good operating practices:
(A) Cleaned parts should be drained at least 15 seconds or until dripping ceases, whichever is longer. Parts having cavities or blind holes shall be tipped or rotated while the part is draining. During the draining, tipping or rotating, the parts should be positioned so that solvent drains directly back to the cold cleaning machine.
(B) When a pump-agitated solvent bath is used, the agitator should be operated to produce a rolling motion of the solvent with no observable splashing of the solvent against the tank walls or the parts being cleaned.
(C) Work area fans should be located and positioned so that they do not blow across the opening of the degreaser unit.
(ii) Be equipped with a cover that shall be closed at all times except during cleaning of parts or the addition or removal of solvent. For remote reservoir cold cleaning machines which drain directly into the solvent storage reservoir, a perforated drain with a diameter of not more than 6 inches shall constitute an acceptable cover.
(3) Cold cleaning machines shall be operated in accordance with the following procedures:
(i) Waste solvent shall be collected and stored in closed containers. The closed containers may contain a device that allows pressure relief, but does not allow liquid solvent to drain from the container.
(ii) Flushing of parts using a flexible hose or other flushing device shall be performed only within the cold cleaning machine. The solvent spray shall be a solid fluid stream, not an atomized or shower spray.
(iii) Sponges, fabric, wood, leather, paper products and other absorbent materials may not be cleaned in the cold cleaning machine.
(iv) Air agitated solvent baths may not be used.
(v) Spills during solvent transfer and use of the cold cleaning machine shall be cleaned up immediately.
(4) After December 22, 2002, a person may not use, sell or offer for sale for use in a cold cleaning machine any solvent with a vapor pressure of 1.0 millimeter of mercury (mm Hg) or greater and containing greater than 5% VOC by weight, measured at 20°C (68°F) containing VOCs.
(5) On and after December 22, 2002, a person who sells or offers for sale any solvent containing VOCs for use in a cold cleaning machine shall provide, to the purchaser, the following written information:
(i) The name and address of the solvent supplier.
(ii) The type of solvent including the product or vendor identification number.
(iii) The vapor pressure of the solvent measured in mm hg at 20°C (68°F).
(6) A person who operates a cold cleaning machine shall maintain for at least 2 years and shall provide to the Department, on request, the information specified in paragraph (5). An invoice, bill of sale, certificate that corresponds to a number of sales, Material Safety Data Sheet (MSDS), or other appropriate documentation acceptable to the Department may be used to comply with this section.
(7) Paragraph (4) does not apply:
(i) To cold cleaning machines used in extreme cleaning service.
(ii) If the owner or operator of the cold cleaning machine demonstrates, and the Department approves in writing, that compliance with paragraph (4) will result in unsafe operating conditions.
(iii) To immersion cold cleaning machines with a freeboard ratio equal to or greater than 0.75.
(b) Batch vapor cleaning machines. Except for those subject to the Federal NESHAP for halogenated solvent cleaners under 40 CFR Part 63, this subsection applies to batch vapor cleaning machines that use solvent containing greater than 5% VOC by weight for the cleaning of metal parts.
(1) Batch vapor cleaning machines shall be equipped with:
(i) Either a fully enclosed design or a working and downtime mode cover that completely covers the cleaning machine openings when in place, is free of cracks, holes and other defects, and can be readily opened or closed without disturbing the vapor zone. If the solvent cleaning machine opening is greater than 10 square feet, the cover shall be powered. If a lip exhaust is used, the closed cover shall be below the level of the lip exhaust.
(ii) Sides which result in a freeboard ratio greater than or equal to 0.75.
(iii) A safety switch (thermostat and condenser flow switch) which shuts off the sump heat if the coolant is not circulating.
(iv) A vapor up control switch which shuts off the spray pump if vapor is not present. A vapor up control switch is not required if the vapor cleaning machine is not equipped with a spray pump.
(v) An automated parts handling system which moves the parts or parts baskets at a speed of 11 feet (3.4 meters) per minute or less when the parts or parts are entering or exiting the vapor zone. If the parts basket being cleaned occupy more than 50% of the solvent/air interface area, the speed of the parts or parts basket may not exceed 3 feet per minute.
(vi) A device that shuts off the sump heat if the sump liquid solvent level drops to the sump heater coils.
(vii) A vapor level control device that shuts off the sump heat if the vapor level in the vapor cleaning machine rises above the height of the primary condenser.
(viii) A permanent, conspicuous label summarizing the operating requirements in paragraph (4).
(2) In addition to the requirements of paragraph (1), the operator of a batch vapor cleaning machine with a solvent/air interface area of 13 square feet or less shall implement one of the following options:
(i) A working mode cover, freeboard ratio of 1.0, and superheated vapor.
(ii) A freeboard refrigeration device and superheated vapor.
(iii) A working mode cover and a freeboard refrigeration device.
(iv) Reduced room draft, freeboard ratio of 1.0 and superheated vapor.
(v) A freeboard refrigeration device and reduced room draft.
(vi) A freeboard refrigeration device and a freeboard ratio of 1.0.
(vii) A freeboard refrigeration device and dwell.
(viii) Reduced room draft, dwell and a freeboard ratio of 1.0.
(ix) A freeboard refrigeration device and a carbon adsorber which reduces solvent emissions in the exhaust to a level not to exceed 100 ppm at any time.
(x) A freeboard ratio of 1.0, superheated vapor and a carbon adsorber.
(3) In addition to the requirements of paragraph (1), the operator of a batch vapor cleaning machine with a solvent/air interface area of greater than 13 square feet shall use one of the following devices or strategies:
(i) A freeboard refrigeration device, a freeboard ratio of 1.0 and superheated vapor.
(ii) Dwell, a freeboard refrigeration device and reduced room draft.
(iii) A working mode cover, a freeboard refrigeration device and superheated vapor.
(iv) Reduced room draft, freeboard ratio of 1.0 and superheated vapor.
(v) A freeboard refrigeration device, reduced room draft and superheated vapor.
(vi) A freeboard refrigeration device, reduced room draft and a freeboard ratio of 1.0.
(vii) A freeboard refrigeration device, superheated vapor and a carbon adsorber which reduces solvent emissions in the exhaust to a level not to exceed 100 ppm at any time.
(4) Batch vapor cleaning machines shall be operated in accordance with the following procedures:
(i) Waste solvent, still bottoms and sump bottoms shall be collected and stored in closed containers. The closed containers may contain a device that allows pressure relief, but does not allow liquid solvent to drain from the container.
(ii) Cleaned parts shall be drained at least 15 seconds or until dripping ceases, whichever is longer. Parts having cavities or blind holes shall be tipped or rotated while the part is draining. A superheated vapor system shall be an acceptable alternate technology.
(iii) Parts or parts baskets may not be removed from the batch vapor cleaning machine until dripping has ceased.
(iv) Flushing or spraying of parts using a flexible hose or other flushing device shall be performed within the vapor zone of the batch vapor cleaning machine or within a section of the machine that is not exposed to the ambient air. The solvent spray shall be a solid fluid stream, not an atomized or shower spray.
(v) Sponges, fabric, wood, leather, paper products and other absorbent materials may not be cleaned in the batch vapor cleaning machine.
(vi) Spills during solvent transfer and use of the batch vapor cleaning machine shall be cleaned up immediately.
(vii) Work area fans shall be located and positioned so that they do not blow across the opening of the batch vapor cleaning machine.
(viii) During startup of the batch vapor cleaning machine, the primary condenser shall be turned on before the sump heater.
(ix) During shutdown of the batch vapor cleaning machine, the sump heater shall be turned off and the solvent vapor layer allowed to collapse before the primary condenser is turned off.
(x) When solvent is added to or drained from the batch vapor cleaning machine, the solvent shall be transferred using threaded or other leakproof couplings and the end of the pipe in the solvent sump shall be located beneath the liquid solvent surface.
(xi) The working and downtime covers shall be closed at all times except during parts entry and exit from the machine, during maintenance of the machine when the solvent has been removed and during addition of solvent to the machine.
(c) In-line vapor cleaning machines. Except for those subject to the Federal NESHAP for halogenated solvent cleaners under 40 CFR Part 63, this section applies to in-line vapor cleaning machines that use solvent containing greater than 5% VOC by weight for the cleaning of metal parts.
(1) In-line vapor cleaning machines shall be equipped with:
(i) Either a fully enclosed design or a working and downtime mode cover that completely covers the cleaning machine openings when in place, is free of cracks, holesand other defects, and can be readily opened or closed without disturbing the vapor zone.
(ii) A switch (thermostat and condenser flow switch) which shuts off the sump heat if the coolant is not circulating.
(iii) Sides which result in a freeboard ratio greater than or equal to 0.75.
(iv) A vapor up control switch.
(v) An automated parts handling system which moves the parts or parts baskets at a speed of 11 feet (3.4 meters) per minute or less when the parts are entering or exiting the vapor zone. If the parts or parts basket being cleaned occupy more than 50% of the solvent/air interface area, the speed of the parts or parts basket may not exceed 3 feet per minute.
(vi) A device that shuts off the sump heat if the sump liquid solvent level drops to the sump heater coils.
(vii) A vapor level control device that shuts off the sump heat if the vapor level in the vapor cleaning machine rises above the height of the primary condenser.
(viii) A permanent, conspicuous label summarizing the operating requirements in paragraph (3).
(2) In addition to the requirements of paragraph (1), the operator of an in-line vapor cleaning machine shall use one of the following devices or strategies:
(i) A freeboard ratio of 1.0 and superheated vapor.
(ii) A freeboard refrigeration device and a freeboard ratio of 1.0.
(iii) Dwell and a freeboard refrigeration device.
(iv) Dwell and a carbon adsorber which reduces solvent emissions in the exhaust to a level not to exceed 100 ppm at any time.
(3) In-line vapor cleaning machines shall be operated in accordance with the following procedures:
(i) Waste solvent, still bottoms and sump bottoms shall be collected and stored in closed containers. The closed containers may contain a device that allows pressure relief, but does not allow liquid solvent to drain from the container.
(ii) Parts shall be oriented so that the solvent drains freely from the parts. Cleaned parts shall be drained at least 15 seconds or until dripping ceases, whichever is longer. Parts having cavities or blind holes shall be tipped or rotated while the part is draining.
(iii) Parts or parts baskets may not be removed from the in-line vapor cleaning machine until dripping has ceased.
(iv) Flushing or spraying of parts using a flexible hose or other flushing device shall be performed within the vapor zone of the in-line vapor cleaning machine or within a section of the machine that is not exposed to the ambient air. The solvent spray shall be a solid fluid stream, not an atomized or shower spray.
(v) Sponges, fabric, wood, leather, paper products and other absorbent materials may not be cleaned in the in-line vapor cleaning machine.
(vi) Spills during solvent transfer and use of the in-line vapor cleaning machine shall be cleaned up immediately.
(vii) Work area fans shall be located and positioned so that they do not blow across the in-line vapor cleaning machine.
(viii) During startup of the in-line vapor cleaning machine, the primary condenser shall be turned on before the sump heater.
(ix) During shutdown of the in-line vapor cleaning machine, the sump heater shall be turned off and the solvent vapor layer allowed to collapse before the primary condenser is turned off.
(x) Spraying operations shall be done in the vapor zone or within a section of the machine that is not exposed to the ambient air.
(xi) When solvent is added to or drained from the in-line vapor cleaning machine, the solvent shall be transferred using threaded or other leakproof couplings and the end of the pipe in the solvent sump shall be located beneath the liquid solvent surface.
(d) Airless cleaning machines and airtight cleaning machines. Except for those subject to the Federal NESHAP for halogenated solvent cleaners under 40 CFR Part 63, this section applies to airless cleaning machines and airtight cleaning machines that use solvent containing greater than 5% VOC by weight for the cleaning of metal parts.
(1) The operator of each machine shall maintain a log of solvent additions and deletions for each machine including the weight of solvent contained in activated carbon or other sorbent material used to control emissions from the cleaning machine.
(2) The operator of each machine shall demonstrate that the emissions from each machine, on a 3-month rolling average, are equal to or less than the allowable limit determined by the use of the following equation:
EL = 330 (vol)0.6 where:
EL = the 3-month rolling average monthly emission limit (kilograms/month).
vol = the cleaning capacity of machine (cubic meters)
(3) The operator of each machine equipped with a solvent adsorber shall measure and record the concentration of solvent in the exhaust of the carbon adsorber weekly with a colorimetric detector tube designed to measure a concentration of 100 ppm by volume of solvent to air at an accuracy of + 25 ppm by volume. This test shall be conducted while the solvent cleaning machine is in the working mode and is venting to the adsorber.
(4) The operator of each machine equipped with a solvent adsorber shall maintain and operate the machine and adsorber system so that emissions from the adsorber exhaust do not exceed 100 ppm by volume measured while the solvent cleaning machine is in the working mode and is venting to the adsorber.
(5) The machine shall be equipped with a permanent, conspicuous label summarizing the operating requirements in paragraph (6).
(6) Airless cleaning machines and airtight cleaning machines shall be operated in accordance with the following procedures:
(i) Waste solvent, still bottoms and sump bottoms shall be collected and stored in closed containers. The closed containers may contain a device that allows pressure relief, but does not allow liquid solvent to drain from the container.
(ii) Parts shall be oriented so that the solvent drains freely from the parts. Cleaned parts shall be drained at least 15 seconds or until dripping ceases, whichever is longer. Parts having cavities or blind holes shall be tipped or rotated while the part is draining.
(iii) Parts or parts baskets may not be removed from the in-line vapor cleaning machine until dripping has ceased.
(iv) Sponges, fabric, wood, leather, paper products and other absorbent materials may not be cleaned in the airless cleaning machines and airtight cleaning machines.
(v) Spills during solvent transfer and use of the airless cleaning machines and airtight cleaning machines shall be cleaned up immediately.
(vi) Work area fans shall be located and positioned so that they do not blow across the airless cleaning machine and airtight cleaning machine.
(vii) Spraying operations shall be done in the vapor zone or within a section of the machine that is not exposed to the ambient air.
(viii) When solvent is added to or drained from the airless cleaning machine and airtight cleaning machine, the solvent shall be transferred using threaded or other leakproof couplings and the end of the pipe in the solvent sump shall be located beneath the liquid solvent surface.
(e) Alternative provisions for solvent cleaning machines. This section applies to all solvent cleaning machines used to process metal parts that use solvents containing greater than 5% VOC by weight. As an alternative to complying with subsections (b)--(d), the operator of a solvent cleaning machine may demonstrate compliance with paragraph (1) or (2). The operator shall maintain records sufficient to demonstrate compliance. The records shall include, at a minimum, the quantity of solvent added to and removed from the solvent cleaning machine, the dates of the addition and removal and shall be maintained for at least 2 years.
(1) If the solvent cleaning machine has a solvent/air interface, the owner or operator shall:
(i) Maintain a log of solvent additions and deletions for each solvent cleaning machine.
(ii) Ensure that the emissions from each solvent cleaning machine are equal to or less than the applicable emission limit presented in Table 1:
Table 1
Emission Limits for
Solvent Cleaning Machines with a
Solvent/Air Interface
Solvent cleaning machine 3-month rolling average
monthly emission limit
(kg/m2/month) lb/ft2/month Batch vapor solvent cleaning machines 150 30.7 Existing in-line solvent cleaning machines 153 31.3 In-line solvent cleaning machines installed after the effective date of the regulation 99 20.2 (2) If the solvent cleaning machine is a batch vapor cleaning machine and does not have a solvent/air interface, the owner or operator shall:
(i) Maintain a log of solvent additions and deletions for each solvent cleaning machine.
(ii) Ensure that the emissions from each solvent cleaning machine are equal to or less than the appropriate limits as described in paragraphs (3) and (4).
(3) For solvent cleaning machines without a solvent/air interface with a cleaning capacity that is less than or equal to 2.95 cubic meters, the emission limit shall be determined using Table 2 or the equation in paragraph (4). If the table is used, and the cleaning capacity of the cleaning machine falls between two cleaning capacity sizes, the lower of the two emission limits applies.
(4) For cleaning machines without a solvent/air interface with a cleaning capacity that is greater than 2.95 cubic meters, the emission limit shall be determined using the following equation.
EL = 330 (vol)0.6
where:
EL = the 3-month rolling average monthly emission limit (kilograms/month)
vol = the cleaning capacity of machine (cubic meters)
(5) Each owner or operator of a batch vapor or in-line solvent cleaning machine complying with this subsection shall demonstrate compliance with the applicable 3-month rolling average monthly emission limit on a monthly basis. If the applicable 3-month rolling average emission limit is not met, an exceedance has occurred. Exceedances shall be reported to the Department within 30 days of the determination of the exceedance.
Table 2. Emission Limits for Solvent Cleaning Machines Without a Solvent/Air Interface
3-month rolling 3-month rolling 3-month rolling Cleaning average Cleaning average Cleaning average capacity monthly emission limit capacity monthly emission limit capacity monthly emission limit (cubic meters) (kilograms/month) (cubic meters) (kilograms/month) (cubic meters) (kilograms/month) 0.00 0 1.00 330 2.00 500 0.05 55 1.05 340 2.05 508 0.10 83 1.10 349 2.10 515 0.15 106 1.15 359 2.15 522 0.20 126 1.20 368 2.20 530 0.25 144 1.25 377 2.25 537 0.30 160 1.30 386 2.30 544 0.35 176 1.35 395 2.35 551 0.40 190 1.40 404 2.40 558 0.45 204 1.45 412 2.45 565 0.50 218 1.50 421 2.50 572 0.55 231 1.55 429 2.55 579 0.60 243 1.60 438 2.60 585 0.65 255 1.65 446 2.65 592 0.70 266 1.70 454 2.70 599 0.75 278 1.75 462 2.75 605 0.80 289 1.80 470 2.80 612 0.85 299 1.85 477 2.85 619 0.90 310 1.90 485 2.90 625 0.95 320 1.95 493 2.95 632
[Pa.B. Doc. No. 01-2271. Filed for public inspection December 21, 2001, 9:00 a.m.]
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