# 7 Del. Admin. Code § 6.0: 7 DE Admin. Code 6.0. Emission Standards for Chromium Emissions from Hard and Decorative Chromium Electroplating and Chromium Anodizing Tanks

> Delaware · Regulations · In force

URL: https://www.frixlaw.com/law-library/statutes/STATE_DE_ADC_T7_60

## Section

- **Citation:** 7 Del. Admin. Code § 6.0
- **Heading:** 7 DE Admin. Code 6.0. Emission Standards for Chromium Emissions from Hard and Decorative Chromium Electroplating and Chromium Anodizing Tanks
- **Jurisdiction:** Delaware
- **Kind:** Regulations
- **Status:** In force
- **Text as of:** August 14, 2026
- **Source:** Compiled text
- **Location:** Delaware Administrative Code / Title 7 Natural Resources and Environmental Control / 1100 Division of Air Quality / 1138 Emission Standards for Hazardous Air Pollutants for Source Categories / 7 DE Admin. Code 6.0

## Text

Control technique | Operation and maintenance procedures | Frequency
Composite mesh-pad (CMP) system. | 1. Visually inspect device to ensure there is proper drainage, no chromic acid buildup on the pads, and no evidence of chemical attack on the structural integrity of the device. | 1. Once per quarter.
2. Visually inspect back portion of the mesh pad closest to the fan to ensure there is no breakthrough of chromic acid mist. | 2. Once per quarter.
3. Visually inspect ductwork from tank to the control device to ensure there are no leaks. | 3. Once per quarter.
4. Perform washdown of the composite mesh-pads in accordance with manufacturer’s recommendations. | 4. Per manufacturer.
Packed-bed scrubber (PBS) | 1. Visually inspect device to ensure there is proper drainage, no chromic acid buildup on the packed beds, and no evidence of chemical attack on the structural integrity of the device. | 1. Once per quarter.
2. Visually inspect back portion of the chevron blade mist eliminator to ensure that it is dry and there is no breakthrough of chromic acid mist. | 2. Once per quarter.
3. Same as number 3 for CMP system. | 3. Once per quarter.
4. Add fresh makeup water to the top of the packed bed a, b . | 4. Whenever makeup is added.
PBS/CMP system. | 1. Same as number 1 for CMP system. | 1. Once per quarter.
2. Same as number 2 for CMP system. | 2. Once per quarter.
3. Same as number 3 for CMP system. | 3. Once per quarter.
4. Same as number 4 for CMP system. | 4. Per manufacturer.
Fiber-bed mist eliminator c . | 1. Visually inspect fiber-bed unit and prefiltering device to ensure there is proper drainage, no chromic acid buildup in the units, and no evidence of chemical attack on the structural integrity of the devices. | 1. Once per quarter.
2. Visually inspect ductwork from tank or tanks to the control device to ensure there are no leaks. | 2. Once per quarter.
3. Perform washdown of fiber elements in accordance with manufacturer’s recommendations. | 3. Per manufacturer
there is proper drainage, no chromic acid buildup in the units, and no evidence of chemical attack on the structural integrity of the devices. | 1. Once per quarter.
2. Visually inspect ductwork from tank or tanks to the control device to ensure there are no leaks. | 2. Once per quarter.
3. Perform washdown of fiber elements in accordance with manufacturer’s recommendations. | 3. Per manufacturer.
Air pollution control device (APCD) not listed in rule. | To be proposed by the source for approval by the Administrator. | To be proposed by the source for approval by the Administrator.
Monitoring Equipment
Pitot tube. | Backflush with water, or remove from the duct and rinse with fresh water. Replace in the duct and rotate 180 degrees to ensure that the same zero reading is obtained. Check pitot tube ends for damage. Replace pitot tube if cracked or fatigued. | Once per quarter.
Stalagmometer. | Follow manufacturer’s recommendations.
For | The owner or operator shall: | At this minimum frequency
1. Any substance used in an affected chromium electroplating or chromium anodizing tank that contains hexavalent chromium. | (a) Store the substance in a closed container in an enclosed storage area or building AND (b) Use a closed container when transporting the substance from the enclosed storage area. | At all times, except when transferring the substance to and from the container. Whenever transporting substance, except when transferring the substance to and from the container.
2. Each affected tank, to minimize spills of bath solution that result from dragout. Note: This measure does not require the return of contaminated bath solution to the tank. This requirement applies only as the parts are removed from the tank. Once away from the tank area, any spilled solution shall be handled in accordance with Item 4 of these housekeeping procedures
e to and from the container.
2. Each affected tank, to minimize spills of bath solution that result from dragout. Note: This measure does not require the return of contaminated bath solution to the tank. This requirement applies only as the parts are removed from the tank. Once away from the tank area, any spilled solution shall be handled in accordance with Item 4 of these housekeeping procedures. | (a) Install drip trays that collect and return to the tank any bath solution that drips or drains from parts as the parts are removed from the tank OR (b) Contain and return to the tank any bath solution that drains or drips from parts as the parts are removed from the tank OR (c) Collect and treat in an onsite wastewater treatment plant any bath solution that drains or drips from parts as the parts are removed from the tank. | Prior to operating the tank. Whenever removing parts from an affected tank. Whenever removing parts from an affected tank.
3. Each spraying operation for removing excess chromic acid from parts removed from, and occurring over, an affected tank. | Install a splash guard to minimize overspray during spraying operations and to ensure that any hexavalent chromium laden liquid captured by the splash guard is returned to the affected chromium electroplating or anodizing tank. | Prior to any such spraying operation.
4. Each operation that involves the handling or use of any substance used in an affected chromium electroplating or chromium anodizing tank that contains hexavalent chromium. | Begin clean up, or otherwise contain, all spills of the substance. Note: Substances that fall or flow into drip trays, pans, sumps, or other containment areas are not considered spills. | Within 1 hour of the spill.
5. Surfaces within the enclosed storage area, open floor area, walkways around affected tanks contaminated with hexavalent chromium from an affected chromium electroplating or chromium anodizing tank
or otherwise contain, all spills of the substance. Note: Substances that fall or flow into drip trays, pans, sumps, or other containment areas are not considered spills. | Within 1 hour of the spill.
5. Surfaces within the enclosed storage area, open floor area, walkways around affected tanks contaminated with hexavalent chromium from an affected chromium electroplating or chromium anodizing tank. | (a) Clean the surfaces using one or more of the following methods: (i) HEPA vacuuming; (ii) Hand-wiping with a damp cloth; (iii) Wet mopping; (iv) Hose down or rinse with potable water that is collected in a wastewater collection system; (v) Other cleaning method approved by the Department; OR (b) Apply a non-toxic chemical dust suppressant to the surfaces. | At least once every 7 days if one or more chromium electroplating or chromium anodizing tanks were used, or at least after every 40 hours of operating time of one or more affected chromium electroplating or chromium anodizing tank, whichever is later. According to manufacturer’s recommendations.
6. All buffing, grinding, or polishing operations that are located in the same room as chromium electroplating or chromium anodizing tank. | Separate the buffing, grinding, or polishing operations from any affected electroplating or anodizing operation tank by installing a physical barrier; the barrier may take the form of plastic strip curtains. | Prior to beginning the buffing, grinding, or polishing operation.
7. All chromium or chromium-containing wastes generated from housekeeping procedures. | Store, dispose, recover, or recycle the wastes using practices that do not lead to fugitive dust and in accordance with hazardous waste requirements. | At all times.
General
Provisions | Applies
Reference | to 6.0 | Comments
3.1.1.1 | Yes | Additional terms defined in 6.2 of this regulation; when overlap between 6.2 and 3.2 of this regulation occurs, 6.2 takes precedence
housekeeping procedures. | Store, dispose, recover, or recycle the wastes using practices that do not lead to fugitive dust and in accordance with hazardous waste requirements. | At all times.
General
Provisions | Applies
Reference | to 6.0 | Comments
3.1.1.1 | Yes | Additional terms defined in 6.2 of this regulation; when overlap between 6.2 and 3.2 of this regulation occurs, 6.2 takes precedence.
3.1.1.2 | Yes
3.1.1.3 | Yes
3.1.1.4 | Yes | 6.0 of this regulation clarifies the applicability of each provision in 3.0 of this regulation to sources subject to 6.0.
3.1.1.5 | No | Reserved.
3.1.1.6 | Yes
3.1.1.7 | No | Reserved.
3.1.1.8 | No | Reserved.
3.1.1.9 | No | Reserved.
3.1.1.10 | Yes
3.1.1.11 | Yes | 6.8.1 of this regulation also allows report submissions via fax and on electronic media.
3.1.1.12 | Yes
3.1.2.1 | No | 6.1 of this regulation specifies applicability.
3.1.2.2 | No | Reserved.
3.1.2.3 | No | This provision in 3.0 of this regulation is being deleted. Also, all affected area and major sources are subject to 6.0 of this regulation; there are no exemptions.
3.1.3.1 | Yes | 6.0 of this regulation clarifies the applicability of each provision in 3.0 of this regulation to sources subject to 6.0.
3.1.3.2 | Yes | 6.1.5 of this regulation exempts area sources from the obligation to obtain Title V operating permits.
3.1.3.3-3.1.3.4 | No | Reserved.
3.1.3.5 | No | 6.0 of this regulation clarifies that an area source that becomes a major source is subject to the requirements for major sources.
3.1.4 | No | Reserved.
3.1.5 | Yes
3.2 | Yes | Additional terms defined in 6.2 of this regulation; when overlap between 6.2 and 3.2 of this regulation occurs, 6.2 takes precedence.
3.3 | Yes | Other units used in 6.0 of this regulation are defined in 6.0.
3.4.1.1-3.4.1.2 | Yes
3.4.1.3-3.4.1.5 | No | Reserved.
3.4.2-3.4.3 | Yes
3.5.1 | Yes | Except replace the term “source” and “stationary source” in 3.5.1.1 and 3.5.1.2 of this regulation with “affected sources.”
3.5.2.1 | Yes
3.5.2.2 | No | Reserved
overlap between 6.2 and 3.2 of this regulation occurs, 6.2 takes precedence.
3.3 | Yes | Other units used in 6.0 of this regulation are defined in 6.0.
3.4.1.1-3.4.1.2 | Yes
3.4.1.3-3.4.1.5 | No | Reserved.
3.4.2-3.4.3 | Yes
3.5.1 | Yes | Except replace the term “source” and “stationary source” in 3.5.1.1 and 3.5.1.2 of this regulation with “affected sources.”
3.5.2.1 | Yes
3.5.2.2 | No | Reserved.
3.5.2.3 | Yes | Applies only to major affected sources.
3.5.2.4 | No | 6.6 of this regulation specifies requirements for the notification of construction or reconstruction for affected sources that are not major sources.
3.5.2.5 | No | Reserved.
3.5.2.6 | Yes
3.5.3 | No | Reserved.
3.5.4.1.1 | No | 6.6.2.5 of this regulation specifies when the application or notification shall be submitted.
3.5.4.1.2-3.5.4.1.2.6 | Yes | Applies to major affected sources that are new or reconstructed.
3.5.4.1.2.7 | No | Reserved.
3.5.4.1.2.8 | Yes
3.5.4.1.2.9 | No | Reserved.
3.5.4.1.2.10 | Yes
3.5.4.1.3 | Yes | Except information should be submitted with the notification of compliance status required in 6.8.5 of this regulation.
3.5.4.2 | Yes | Applies to major affected sources that are new or reconstructed except: (1) replace “source” in 3.5.4.2 of this regulation with “affected source”; and (2) actual control efficiencies are submitted with the notification of compliance status required in 6.8.5 of this regulation.
3.5.4.3-3.5.4.4 | Yes | Applies to major affected sources that are new or reconstructed.
3.5.5 | Yes | Applies to major affected sources that are new or reconstructed.
3.5.6.1 | Yes | Except replace “source” in 3.5.6.1 of this regulation with “affected source.”
3.5.6.2 | No | New or reconstructed affected sources shall submit the request for approval of construction or reconstruction under 3.5.6 of this regulation by the deadline specified in 6.6.2.5 of this regulation
reconstructed.
3.5.5 | Yes | Applies to major affected sources that are new or reconstructed.
3.5.6.1 | Yes | Except replace “source” in 3.5.6.1 of this regulation with “affected source.”
3.5.6.2 | No | New or reconstructed affected sources shall submit the request for approval of construction or reconstruction under 3.5.6 of this regulation by the deadline specified in 6.6.2.5 of this regulation.
3.6.1 | Yes
3.6.2.1-3.6.2.2 | Yes | Except replace “source” in 3.6.2.1 and 3.6.2.2 of this regulation with “affected source.”
3.6.2.3-3.6.2.4 | Yes
3.6.2.5 | Yes | Except replace “source” in 3.6.2.5 of this regulation with “affected source.”
3.6.2.6 | No | Reserved.
3.6.2.7 | No | Provisions for new area sources that become major sources are contained in 6.4.1.4 of this regulation.
3.6.3.1-3.6.3.2 | Yes | Except replace “source” in 3.6.3.1 and 3.6.3.2 of this regulation with “affected source.”
3.6.3.3-3.6.3.4 | No | Reserved.
3.6.3.5 | No | Compliance provisions for existing area sources that become major sources are contained in 6.4.1.3 of this regulation.
3.6.4 | No | Reserved.
3.6.5 | No | 6.3.6 of this regulation contains work practice standards (operation and maintenance requirements) that override these provisions.
3.6.6.1 | No | 6.3.2 of this regulation specifies when the standards apply.
3.6.6.2.1-3.6.6.2.2 | Yes
3.6.6.2.3 | No | 6.5.2 of this regulation specifies instances in which previous performance test results for existing sources are acceptable.
3.6.6.2.4 | Yes
3.6.6.2.5 | Yes
3.6.6.3 | Yes
3.6.7 | Yes
3.6.8 | No | 6.0 of this regulation does not contain any opacity or visible emission standards.
3.6.9.1 | Yes
3.6.9.2 | Yes | Except replace “source” in 3.6.9.2.1 and 3.6.9.2.2 of this regulation with “affected source”.
3.6.9.3 | Yes
3.6.9.4.1 | No | 6.4.1.6 of this regulation specifies the procedures for obtaining an extension of compliance and the date by which such requests shall be submitted
s
3.6.8 | No | 6.0 of this regulation does not contain any opacity or visible emission standards.
3.6.9.1 | Yes
3.6.9.2 | Yes | Except replace “source” in 3.6.9.2.1 and 3.6.9.2.2 of this regulation with “affected source”.
3.6.9.3 | Yes
3.6.9.4.1 | No | 6.4.1.6 of this regulation specifies the procedures for obtaining an extension of compliance and the date by which such requests shall be submitted.
3.6.9.4.2 | Yes
3.6.9.5 | Yes
3.6.9.6.1 | Yes | This paragraph only references “3.6.9.4 of this regulation” for compliance extension provisions. But, 6.4.1.6 of this regulation also contains provisions for requesting a compliance extension.
3.6.9.6.2 | Yes
3.6.9.7 | Yes
3.6.9.8 | Yes | This paragraph only references “3.6.9.4 through 3.6.9.6 of this regulation” for compliance extension provisions. But, 6.4.1.6 of this regulation also contains provisions for requesting a compliance extension.
3.6.9.9 | Yes | This paragraph only references “3.6.9.4 through 3.6.9.6 of this regulation” and “3.6.9.4 and 3.6.9.5 of this regulation” for compliance extension provisions. But, 6.4.1.6 of this regulation also contains provisions for requesting a compliance extension.
3.6.9.10.1-3.6.9.10.4 | Yes
3.6.9.10.5.1 | Yes | This paragraph only references “3.6.9.4 of this regulation” for compliance extension provisions. But, 6.4.1.6 of this regulation also contains provisions for requesting a compliance extension.
3.6.9.10.5.2 | Yes
3.6.9.11 | Yes
3.6.9.12.1 | Yes | This paragraph only references “3.6.9.4.1 or 3.6.9.5 of this regulation” for compliance extension provisions. But, 6.4.1.6 of this regulation also contains provisions for requesting a compliance extension
3.6.9.12.2-3.6.9.12.4 | Yes
3.6.9.13 | Yes
3.6.9.14 | Yes
3.6.9.15 | No | Reserved.
3.6.9.16 | Yes
3.6.10 | Yes
3.7.1.1-3.7.1.2 | Yes
3.7.1.2.1-3.7.1.2.8 | No | Reserved.
3.7.1.2.9 | Yes
3.7.1.3 | Yes
3.7.2.1 | No | 6.8.4 of this regulation requires notification prior to the performance test
provisions. But, 6.4.1.6 of this regulation also contains provisions for requesting a compliance extension
3.6.9.12.2-3.6.9.12.4 | Yes
3.6.9.13 | Yes
3.6.9.14 | Yes
3.6.9.15 | No | Reserved.
3.6.9.16 | Yes
3.6.10 | Yes
3.7.1.1-3.7.1.2 | Yes
3.7.1.2.1-3.7.1.2.8 | No | Reserved.
3.7.1.2.9 | Yes
3.7.1.3 | Yes
3.7.2.1 | No | 6.8.4 of this regulation requires notification prior to the performance test. 6.5.1 of this regulation requires submission of a site-specific test plan upon request.
3.7.2.2 | Yes
3.7.3 | No | 6.5.1 of this regulation specifies what the test plan should contain, but does not require test plan approval or performance audit samples.
3.7.4 | Yes | Except replace “source” in the first sentence of 3.7.4 of this regulation with “affected source.”
3.7.5.1 | No | See 6.5.1 of this regulation. Any cross reference to 3.7.5.1 of this regulation in any other general provision incorporated by reference shall be treated as a cross-reference to 6.5.1.
3.7.5.2-3.7.5.4 | Yes | 6.0 of this regulation also contains test methods specific to affected sources covered by 6.0.
3.7.6 | Yes | 6.5.3.2 of this regulation identifies CARB Method 425 as acceptable under certain conditions.
3.7.7.1 | No | 6.0 of this regulation identifies the items to be reported in the compliance test [6.5.1 of this regulation] and the timeframe for submitting the results [6.8.6 of this regulation].
3.7.7.2 | No | Reserved.
3.7.7.3 | Yes
3.7.8.1-3.7.8.2 | Yes
3.7.8.3.1 | Yes | This paragraph only references “3.6.9” for compliance extension provisions. But, 6.4.1.6 of this regulation also contains provisions for requesting a compliance extension.
3.7.8.3.2-3.7.8.3.3 | Yes
3.7.8.4-3.7.8.5 | Yes
3.8.1.1 | Yes
3.8.1.2 | No | Work practice standards are contained in 6.3.6 of this regulation.
3.8.1.3 | No | Reserved.
3.8.1.4 | No
3.8.2.1 | Yes
3.8.2.2 | No | 6.5.4 of this regulation specifies the monitoring location when there are multiple sources
s. But, 6.4.1.6 of this regulation also contains provisions for requesting a compliance extension.
3.7.8.3.2-3.7.8.3.3 | Yes
3.7.8.4-3.7.8.5 | Yes
3.8.1.1 | Yes
3.8.1.2 | No | Work practice standards are contained in 6.3.6 of this regulation.
3.8.1.3 | No | Reserved.
3.8.1.4 | No
3.8.2.1 | Yes
3.8.2.2 | No | 6.5.4 of this regulation specifies the monitoring location when there are multiple sources.
3.8.2.3 | No | 6.8.7.4 of this regulation identifies reporting requirements when multiple monitors are used.
3.8.3.1.1 | No | 6.0 of this regulation requires proper maintenance of monitoring devices expected to be used by sources subject to 6.0.
3.8.3.1.2 | No | 6.3.6.3.4 of this regulation specifies reporting when the O&M plan is not followed.
3.8.3.1.3 | No | 6.3.6.2 of this regulation identifies the criteria for whether O&M procedures are acceptable.
3.8.3.2-3.8.3.3 | No | 6.5.4.2 of this regulation requires appropriate use of monitoring devices.
3.8.3.4-3.8.3.8 | No
3.8.4 | No | Maintenance of monitoring devices is required in 6.3.6 and 6.5.4.2 of this regulation.
3.8.5 | No | There are no performance evaluation procedures for the monitoring devices expected to be used to comply with 6.0 of this regulation.
3.8.6.1 | Yes
3.8.6.2 | No | Instances in which the Administrator may approve alternatives to the monitoring methods and procedures of 6.0 of this regulation are contained in 6.4.3.8 of this regulation.
3.8.6.3 | Yes
3.8.6.4 | Yes
3.8.6.5 | Yes
3.8.6.6 | No | 6.0 of this regulation does not require the use of CEM’s.
3.8.7 | No | Monitoring data does not need to be reduced for reporting purposes because 6.0 of this regulation requires measurement once/day.
3.9.1 | Yes
3.9.2.1.1-3.9.2.1.2 | No | 6.4.1.3 requires area sources to comply with major source provisions if an increase in HAP emissions causes them to become major sources.
3.9.2.1.3 | No | 6.8.3.2 of this regulation of specifies initial notification requirements for new or reconstructed affected sources
duced for reporting purposes because 6.0 of this regulation requires measurement once/day.
3.9.1 | Yes
3.9.2.1.1-3.9.2.1.2 | No | 6.4.1.3 requires area sources to comply with major source provisions if an increase in HAP emissions causes them to become major sources.
3.9.2.1.3 | No | 6.8.3.2 of this regulation of specifies initial notification requirements for new or reconstructed affected sources.
3.9.2.2 | No | 6.8.3.1 of this regulation specifies the information to be contained in the initial notification.
3.9.2.3 | No | 6.8.3.2 of this regulation specifies notification requirements for new or reconstructed sources that are not major affected sources.
3.9.2.4 | No
3.9.2.5 | No
3.9.3 | Yes | This paragraph only references “3.6.9.4 through 3.6.9.6” for compliance extension provisions. But, 6.4.1.6 of this regulation also contains provisions for requesting a compliance extension. 6.0 of this regulation provides a different timeframe for submitting the request than 3.6.9.4 of this regulation.
3.9.4 | Yes | This paragraph only references “the notification dates established in 3.9.7 of this regulation”. But, 6.8 of this regulation also contains notification dates
3.9.5 | No | Notification of performance test is required in 6.8.4 of this regulation
3.9.6 | No
3.9.7 | No | 6.0 of this regulation does not require a performance evaluation or relative accuracy test for monitoring devices.
3.9.8.1-3.9.8.3 | No | 6.8.5 of this regulation specifies information to be contained in the notification of compliance status and the timeframe for submitting this information.
3.9.8.4 | No | Reserved/
3.9.8.5 | No | Similar language has been incorporated into 6.8.5.2.3 of this regulation.
3.9.8.6 | Yes
3.9.9 | Yes
3.9.10 | Yes
3.10.1 | Yes
3.10.2.1 | Yes
3.10.2.2 | No | 6.7.2 of this regulation specifies the records that shall be maintained.
3.10.2.3 | No | 6.0 of this regulation applies to major and area sources.
3.10.3 | No | Applicable requirements of 3.10.3 of this regulation have been incorporated into 6.7.2 of this regulation
en incorporated into 6.8.5.2.3 of this regulation.
3.9.8.6 | Yes
3.9.9 | Yes
3.9.10 | Yes
3.10.1 | Yes
3.10.2.1 | Yes
3.10.2.2 | No | 6.7.2 of this regulation specifies the records that shall be maintained.
3.10.2.3 | No | 6.0 of this regulation applies to major and area sources.
3.10.3 | No | Applicable requirements of 3.10.3 of this regulation have been incorporated into 6.7.2 of this regulation.
3.10.4.1 | Yes
3.10.4.2 | No | 6.8.6 of this regulation specifies the timeframe for reporting performance test results.
3.10.4.3 | No | 6.0 of this regulation does not contain opacity or visible emissions standards.
3.10.4.4 | Yes
3.10.4.5 | No | 6.3.6.3.4 and 6.8.7.3 of this regulation specify reporting associated with malfunctions.
3.10.5 | No | 6.8.7 and 6.8.8 of this regulation specify the frequency of periodic reports of monitoring data used to establish compliance. Applicable requirements of 3.10.5 of this regulation have been incorporated into 6.8.7 and 6.8.8.
3.10.6 | Yes
3.11 | No | Flares will not be used to comply with the emission limitations.
3.12-3.15 | Yes
Title 7 Natural Resources and Environmental Control
1138 Emission Standards for Hazardous Air Pollutants for Source Categories
6.1 Applicability and designation of sources.
6.1.1 The affected source to which the provisions of 6.0 of this regulation apply is each chromium electroplating or chromium anodizing tank at facilities performing hard chromium electroplating, decorative chromium electroplating, or chromium anodizing.
6.1.2 Owners or operators of affected sources subject to the provisions of 6.0 of this regulation shall also comply with the requirements of 3.0 of this regulation, according to the applicability of 3.0 to such sources, as identified in Table 6-3 of this regulation.
6.1.3 Process tanks associated with a chromium electroplating or chromium anodizing process, but in which neither chromium electroplating nor chromium anodizing is taking place, are not subject to the provisions of 6.0 of this regulation
also comply with the requirements of 3.0 of this regulation, according to the applicability of 3.0 to such sources, as identified in Table 6-3 of this regulation.
6.1.3 Process tanks associated with a chromium electroplating or chromium anodizing process, but in which neither chromium electroplating nor chromium anodizing is taking place, are not subject to the provisions of 6.0 of this regulation. Examples of such tanks include, but are not limited to, rinse tanks, etching tanks, and cleaning tanks. Likewise, tanks that contain a chromium solution, but in which no electrolytic process occurs, are not subject to 6.0. An example of such a tank is a chrome conversion coating tank where no electrical current is applied.
6.1.4 Affected sources in which research or laboratory operations are performed are exempt from the provisions of 6.0 of this regulation when such operations are taking place.
6.1.5 The owner or operator of an area source subject to 6.0 of this regulation is exempt from the obligation to obtain a Title V operating permit under 7 DE Admin. Code 1130 of the State of Delaware “Regulations Governing the Control of Air Pollution”, if the owner or operator is not required to obtain a Title V operating permit under 3.1 of 7 DE Admin. Code 1130 for a reason other than the owner or operator’s status as an area source under 6.0. Notwithstanding the previous sentence, the owner or operator shall continue to comply with the provisions of 6.0 applicable to area sources.
6.2 Definitions and nomenclature.
6.2.1 Definitions.
Terms used in 6.0 of this regulation are defined in the Act, in 3.2 of this regulation, or in 6.2 of this regulation. For the purposes of 6.0, if the same term is defined in 6.2 and in 3.2, it shall have the meaning given in 6.2.
“Add-on air pollution control device” means equipment installed in the ventilation system of chromium electroplating and anodizing tanks for the purposes of collecting and containing chromium emissions from the tank or tanks
e Act, in 3.2 of this regulation, or in 6.2 of this regulation. For the purposes of 6.0, if the same term is defined in 6.2 and in 3.2, it shall have the meaning given in 6.2.
“Add-on air pollution control device” means equipment installed in the ventilation system of chromium electroplating and anodizing tanks for the purposes of collecting and containing chromium emissions from the tank or tanks.
“ Affirmative defense ” means, in the context of an enforcement proceeding, a response or a defense put forward by a defendant, regarding which the defendant has the burden of proof, and the merits of which are independently and objectively evaluated in a judicial or administrative proceeding.
“Air pollution control technique” means any method, such as an add-on air pollution control device or a chemical fume suppressant, used to reduce chromium emissions from chromium electroplating and chromium anodizing tanks.
“Base metal” means the metal or metal alloy that comprises the part.
“Bath component” means the trade or brand name of each component in trivalent chromium plating baths. For trivalent chromium baths, the bath composition is proprietary in most cases. Therefore, the trade or brand name for each component can be used; however, the chemical name of the wetting agent contained in that component shall be identified.
“Chemical fume suppressant” means any chemical agent that reduces or suppresses fumes or mists at the surface of an electroplating or anodizing bath; another term for fume suppressant is mist suppressant.
“Chromic acid” means the common name for chromium anhydride (CrO 3 ).
“Chromium anodizing” means the electrolytic process by which an oxide layer is produced on the surface of a base metal for functional purposes (e.g., corrosion resistance or electrical insulation) using a chromic acid solution
surface of an electroplating or anodizing bath; another term for fume suppressant is mist suppressant.
“Chromic acid” means the common name for chromium anhydride (CrO 3 ).
“Chromium anodizing” means the electrolytic process by which an oxide layer is produced on the surface of a base metal for functional purposes (e.g., corrosion resistance or electrical insulation) using a chromic acid solution. In chromium anodizing, the part to be anodized acts as the anode in the electrical circuit, and the chromic acid solution, with a concentration typically ranging from 50 to 100 grams per liter (g/l), serves as the electrolyte.
“Chromium anodizing tank” means the receptacle or container along with the following accompanying internal and external components needed for chromium anodizing: rectifiers fitted with controls to allow for voltage adjustments, heat exchanger equipment, circulation pumps, and air agitation systems.
“Chromium electroplating tank” means the receptacle or container along with the following internal and external components needed for chromium electroplating: rectifiers, anodes, heat exchanger equipment, circulation pumps, and air agitation systems.
“Composite mesh-pad system” means an add-on air pollution control device typically consisting of several mesh-pad stages. The purpose of the first stage is to remove large particles. Smaller particles are removed in the second stage, which consists of the composite mesh pad. A final stage may remove any re-entrained particles not collected by the composite mesh pad.
“ Contains hexavalent chromium ” means, the substance consists of, or contains 0.1% or greater by weight, chromium trioxide, chromium (VI) oxide, chromic acid, or chromic anhydride.
“Decorative chromium electroplating” means the process by which a thin layer of chromium (typically 0.003 to 2.5 microns) is electrodeposited on a base metal, plastic, or undercoating to provide a bright surface with wear and tarnish resistance
mium ” means, the substance consists of, or contains 0.1% or greater by weight, chromium trioxide, chromium (VI) oxide, chromic acid, or chromic anhydride.
“Decorative chromium electroplating” means the process by which a thin layer of chromium (typically 0.003 to 2.5 microns) is electrodeposited on a base metal, plastic, or undercoating to provide a bright surface with wear and tarnish resistance. In this process, the part or parts serve as the cathode in the electrolytic cell and the solution serves as the electrolyte. Typical current density applied during this process ranges from 540 to 2,400 amperes per square meter (amp/m 2 ) for total plating times ranging between 0.5 to five minutes.
“Electroplating or anodizing bath” means the electrolytic solution used as the conducting medium in which the flow of current is accompanied by movement of metal ions for the purposes of electroplating metal out of the solution onto a part or for oxidizing the base material.
“Emission limitation” means, for the purposes of 6.0 of this regulation, the concentration of total chromium allowed to be emitted expressed in milligrams per dry standard cubic meter (mg/dscm), or the allowable surface tension expressed in dynes per centimeter (dynes/cm).
“Enclosed hard chromium electroplating tank” means a chromium electroplating tank that is equipped with an enclosing hood and ventilated at half the rate or less that of an open surface tank of the same surface area.
“ Existing affected source ” means an affected hard chromium electroplating tank, decorative chromium electroplating tank, or chromium anodizing tank, the construction or reconstruction of which commenced on or before February 8, 2012.
“Facility” means the major or area source at which chromium electroplating or chromium anodizing is performed.
“Fiber-bed mist eliminator” means an add-on air pollution control device that removes contaminants from a gas stream through the mechanisms of inertial impaction and Brownian diffusion
ium anodizing tank, the construction or reconstruction of which commenced on or before February 8, 2012.
“Facility” means the major or area source at which chromium electroplating or chromium anodizing is performed.
“Fiber-bed mist eliminator” means an add-on air pollution control device that removes contaminants from a gas stream through the mechanisms of inertial impaction and Brownian diffusion. These devices are typically installed downstream of another control device, which serves to prevent plugging, and consist of one or more fiber beds. Each bed consists of a hollow cylinder formed from two concentric screens; the fiber between the screens may be fabricated from glass, ceramic, plastic, or metal.
“Foam blanket” means the type of chemical fume suppressant that generates a layer of foam across the surface of a solution when current is applied to that solution.
“Fresh water” means water, such as tap water, that has not been previously used in a process operation or, if the water has been recycled from a process operation, it has been treated and meets the effluent guidelines for chromium wastewater.
“Hard chromium electroplating or industrial chromium electroplating” means a process by which a thick layer of chromium (typically 1.3 to 760 microns) is electrodeposited on a base material to provide a surface with functional properties such as wear resistance, a low coefficient of friction, hardness, and corrosion resistance. In this process, the part serves as the cathode in the electrolytic cell and the solution serves as the electrolyte. Hard chromium electroplating process is performed at current densities typically ranging from 1,600 to 6,500 amp/m 2 for total plating times ranging from 20 minutes to 36 hours depending upon the desired plate thickness.
“Hexavalent chromium” means the form of chromium in a valence state of +6
cess, the part serves as the cathode in the electrolytic cell and the solution serves as the electrolyte. Hard chromium electroplating process is performed at current densities typically ranging from 1,600 to 6,500 amp/m 2 for total plating times ranging from 20 minutes to 36 hours depending upon the desired plate thickness.
“Hexavalent chromium” means the form of chromium in a valence state of +6.
“Large, hard chromium electroplating facility” means a facility that performs hard chromium electroplating and has a maximum cumulative potential rectifier capacity greater than or equal to 60 million ampere-hours per year (amp-hr/yr).
“Maximum cumulative potential rectifier capacity” means the summation of the total installed rectifier capacity associated with the hard chromium electroplating tanks at a facility, expressed in amperes, multiplied by the maximum potential operating schedule of 8,400 hours per year and 0.7, which assumes that electrodes are energized 70% of the total operating time. The maximum potential operating schedule is based on operating 24 hours per day, seven days per week, 50 weeks per year.
“ New affected source ” means an affected hard chromium electroplating tank, decorative chromium electroplating tank, or chromium anodizing tank, the construction or reconstruction of which commenced after February 8, 2012.
“Open surface hard chromium electroplating tank” means a chromium electroplating tank that is ventilated at a rate consistent with good ventilation practices for open tanks.
“Operating parameter value” means a minimum or maximum value established for a control device or process parameter which, if achieved by itself or in combination with one or more other operating parameter values, determines that an owner or operator is in continual compliance with the applicable emission limitation or standard.
“Packed-bed scrubber” means an add-on air pollution control device consisting of a single or double packed bed that contains packing media on which the chromic acid droplets impinge
ter which, if achieved by itself or in combination with one or more other operating parameter values, determines that an owner or operator is in continual compliance with the applicable emission limitation or standard.
“Packed-bed scrubber” means an add-on air pollution control device consisting of a single or double packed bed that contains packing media on which the chromic acid droplets impinge. The packed-bed section of the scrubber is followed by a mist eliminator to remove any water entrained from the packed-bed section.
“ Perfluorooctane sulfonic acid (PFOS)-based fume suppressant ” means a fume suppressant that contains 1% or greater PFOS by weight.
“Research or laboratory operation” means an operation whose primary purpose is for research and development of new processes and products, that is conducted under the close supervision of technically trained personnel, and that is not involved in the manufacture of products for commercial sale in commerce, except in a de minimis manner.
“Small, hard chromium electroplating facility” means a facility that performs hard chromium electroplating and has a maximum cumulative potential rectifier capacity less than 60 million amp-hr/yr.
“Stalagmometer” means an instrument used to measure the surface tension of a solution by determining the mass of a drop of liquid by weighing a known number of drops or by counting the number of drops obtained from a given volume of liquid.
“Surface tension” means the property, due to molecular forces, that exists in the surface film of all liquids and tends to prevent liquid from spreading.
“Tank operation” means the time in which current or voltage is being applied to a chromium electroplating tank or a chromium anodizing tank.
“Tensiometer” means an instrument used to measure the surface tension of a solution by determining the amount of force needed to pull a ring from the liquid surface. The amount of force is proportional to the surface tension.
“Trivalent chromium” means the form of chromium in a valence state of +3
h current or voltage is being applied to a chromium electroplating tank or a chromium anodizing tank.
“Tensiometer” means an instrument used to measure the surface tension of a solution by determining the amount of force needed to pull a ring from the liquid surface. The amount of force is proportional to the surface tension.
“Trivalent chromium” means the form of chromium in a valence state of +3.
“Trivalent chromium process” means the process used for electrodeposition of a thin layer of chromium onto a base material using a trivalent chromium solution instead of a chromic acid solution.
“Wetting agent” means the type of commercially available chemical fume suppressant that materially reduces the surface tension of a liquid.
6.2.2 Nomenclature.
The nomenclature used in 6.0 of this regulation has the following meaning:
6.2.2.1 AMR = the allowable mass emission rate from each type of affected source subject to the same emission limitation in milligrams per hour (mg/hr).
6.2.2.2 AMR sys = the allowable mass emission rate from affected sources controlled by an add-on air pollution control device controlling emissions from multiple sources in mg/hr.
6.2.2.3 EL = the applicable emission limitation in 6.3 of this regulation in milligrams per dry standard cubic meter (mg/dscm).
6.2.2.4 IA total = the sum of all inlet duct areas from both affected and nonaffected sources in meters squared.
6.2.2.5 IDA i = the total inlet area for all ducts associated with affected sources in meters squared.
6.2.2.6 IDA i,a = the total inlet duct area for all ducts conveying chromic acid from each type of affected source performing the same operation, or each type of affected source subject to the same emission limitation in meters squared.
6.2.2.7 VR = the total of ventilation rates for each type of affected source subject to the same emission limitation in dry standard cubic meters per minute (dscm/min).
6.2.2.8 VR inlet = the total ventilation rate from all inlet ducts associated with affected sources in dscm/min
rforming the same operation, or each type of affected source subject to the same emission limitation in meters squared.
6.2.2.7 VR = the total of ventilation rates for each type of affected source subject to the same emission limitation in dry standard cubic meters per minute (dscm/min).
6.2.2.8 VR inlet = the total ventilation rate from all inlet ducts associated with affected sources in dscm/min.
6.2.2.9 VR inlet,a = the total ventilation rate from all inlet ducts conveying chromic acid from each type of affected source performing the same operation, or each type of affected source subject to the same emission limitation in dscm/min.
6.2.2.10 VR tot = the average total ventilation rate for the three test runs as determined at the outlet by means of the Method 306 or 306A testing specified in Appendix A of 40 CFR Part 63 in dscm/min.
6.3 Standards.
6.3.1 Compliance with provisions.
6.3.1.1 Each owner or operator of an affected source subject to the provisions of 6.0 of this regulation shall comply with the requirements of 6.0 on and after the compliance dates specified in 6.4.1 of this regulation.
6.3.1.2 At all times, each owner or operator shall operate and maintain any affected source subject to the requirements of 6.0 of this regulation, including associated air pollution control equipment and monitoring equipment, in a manner consistent with safety and good air pollution control practices for minimizing emissions. The general duty to minimize emissions does not require the owner or operator to make any further efforts to reduce emissions if levels required by 6.0 have been achieved. Determination of whether such operation and maintenance procedures are being used will be based on information available to the Department which may include, but is not limited to, monitoring results, review of operation and maintenance procedures, review of operation and maintenance records, and inspection of the source.
6.3.2 Applicability of emission limitations
uired by 6.0 have been achieved. Determination of whether such operation and maintenance procedures are being used will be based on information available to the Department which may include, but is not limited to, monitoring results, review of operation and maintenance procedures, review of operation and maintenance records, and inspection of the source.
6.3.2 Applicability of emission limitations.
6.3.2.1 The emission limitations in 6.3 of this regulation apply during tank operation as defined in 6.2 of this regulation, and during periods of startup and shutdown as these are routine occurrences for affected sources subject to 6.0 of this regulation. The emission limitations in 6.3 also apply during periods of malfunction. In response to an action to enforce the standards set forth in 6.0, the owner or operator may assert a defense to a claim for civil penalties for violations of such standards that are caused by a malfunction, as defined in 3.2 of this regulation. Appropriate penalties may be assessed, however, if the owner or operator fails to meet the burden of proving all the requirements in the affirmative defense. The affirmative defense shall not be available for claims for injunctive relief.
6.3.2.1.1 To establish the affirmative defense in any action to enforce such a standard, the owner or operator shall timely meet the reporting requirements of 6.3.2.1.2 of this regulation, and shall prove by a preponderance of evidence that:
6.3.2.1.1.1 The violation was caused by a sudden, infrequent, and unavoidable failure of air pollution control equipment, process equipment, or a process to operate in a normal and usual manner; and could not have been prevented through careful planning, proper design, or better operation and maintenance procedures; and did not stem from any activity or event that could have been foreseen and avoided, or planned for; and was not part of a recurring pattern indicative of inadequate design, operation, or maintenance;
6.3.2.1.1.2 Repairs were made as expeditiously as possible when ex
manner; and could not have been prevented through careful planning, proper design, or better operation and maintenance procedures; and did not stem from any activity or event that could have been foreseen and avoided, or planned for; and was not part of a recurring pattern indicative of inadequate design, operation, or maintenance;
6.3.2.1.1.2 Repairs were made as expeditiously as possible when exceeded violation occurred. Off-shift and overtime labor were used, to the extent practicable to make these repairs;
6.3.2.1.1.3 The frequency, amount, and duration of the violation (including any bypass) were minimized to the maximum extent practicable;
6.3.2.1.1.4 If the violation resulted from a bypass of control equipment or a process, then the bypass was unavoidable to prevent loss of life, personal injury, or severe property damage;
6.3.2.1.1.5 All possible steps were taken to minimize the impact of the violation on ambient air quality, the environment, and human health;
6.3.2.1.1.6 All emissions monitoring and control systems were kept in operation if at all possible, consistent with safety and good air pollution control practices;
6.3.2.1.1.7 All of the actions in response to the violation were documented by properly signed, contemporaneous operating logs;
6.3.2.1.1.8 At all times, the affected sources were operated in a manner consistent with good practices for minimizing emissions;
6.3.2.1.1.9 A written root cause analysis was prepared, the purpose of which is to determine, correct, and eliminate the primary causes of the malfunction and the excess emissions resulting from the malfunction event at issue. The analysis shall also specify, using the best monitoring methods and engineering judgment, the amount of excess emissions that were the result of the malfunction.
6.3.2.1.2 Affirmative defense report
ause analysis was prepared, the purpose of which is to determine, correct, and eliminate the primary causes of the malfunction and the excess emissions resulting from the malfunction event at issue. The analysis shall also specify, using the best monitoring methods and engineering judgment, the amount of excess emissions that were the result of the malfunction.
6.3.2.1.2 Affirmative defense report. The owner or operator seeking to assert an affirmative defense shall submit a written report to the Department with all necessary supporting documentation, that it has met the requirements set forth in 6.3.2.1.1 of this regulation. This affirmative defense report shall be included in the first periodic compliance report, deviation report, or excess emission report otherwise required after the initial occurrence of the violation of 6.0 of this regulation (which may be the end of any applicable averaging period). If such compliance report, deviation report, or excess emission report is due less than 45 days after the initial occurrence of the violation, the affirmation defense report may be included in the second compliance report, deviation report, or excess emission report due after the initial occurrence of the violation of 6.0.
6.3.2.2 If an owner or operator is controlling a group of tanks with a common add-on air pollution control device, the emission limitations in 6.3.3 through 6.3.5 of this regulation apply whenever any one affected source is operated
n defense report may be included in the second compliance report, deviation report, or excess emission report due after the initial occurrence of the violation of 6.0.
6.3.2.2 If an owner or operator is controlling a group of tanks with a common add-on air pollution control device, the emission limitations in 6.3.3 through 6.3.5 of this regulation apply whenever any one affected source is operated. The emission limitation that applies to the group of affected sources is as follows:
6.3.2.2.1 The emission limitation identified in 6.3.3 though 6.3.5 of this regulation if the affected sources are performing the same type of operation (e.g., hard chromium electroplating), are subject to the same emission limitation, and are not controlled by an add-on air pollution control device also controlling nonaffected sources;
6.3.2.2.2 The emission limitation calculated according to 6.5.5.3 of this regulation if affected sources are performing the same type of operation, are subject to the same emission limitation, and are controlled with an add-on air pollution control device that is also controlling nonaffected sources; and
6.3.2.2.3 The emission limitation calculated according to 6.5.5.4 of this regulation if affected sources are performing different types of operations or if affected sources are performing the same operations but subject to different emission limitations and are controlled with an add-on air pollution control device that may also be controlling emissions from nonaffected sources.
6.3.3 Standards for hard chromium electroplating tanks.
6.3.3.1 Standards for open surface hard chromium electroplating tanks. During tank operation, each owner or operator of an existing, new, or reconstructed affected open surface hard chromium electroplating tank shall be in compliance with the applicable requirements of 6.3.3.1.1, 6.3.3.1.2, 6.3.3.1.3, and 6.3.3.1.4 of this regulation
sources.
6.3.3 Standards for hard chromium electroplating tanks.
6.3.3.1 Standards for open surface hard chromium electroplating tanks. During tank operation, each owner or operator of an existing, new, or reconstructed affected open surface hard chromium electroplating tank shall be in compliance with the applicable requirements of 6.3.3.1.1, 6.3.3.1.2, 6.3.3.1.3, and 6.3.3.1.4 of this regulation.
6.3.3.1.1 Prior to September 19, 2014, each owner or operator of an existing affected open surface hard chromium electroplating tank shall control chromium emissions discharged to the atmosphere from that affected source by being in compliance with 6.3.3.1.1.1, 6.3.3.1.1.2, or 6.3.3.1.1.3 of this regulation.
6.3.3.1.1.1 Each owner or operator of an existing open surface hard chromium electroplating tank shall not allow the concentration of total chromium in the exhaust gas stream discharged to the atmosphere to exceed 0.03 milligrams of total chromium per dry standard cubic meter (mg/dscm) of ventilation air (1.3 x 10 -5 grains per dry standard cubic foot (gr/dscf)), if the existing open surface hard chromium electroplating tank had an initial startup on or before December 16, 1993 and is located at a small, hard chromium electroplating facility;
6.3.3.1.1.2 Each owner or operator of an existing open surface hard chromium electroplating tank shall not allow the concentration of total chromium in the exhaust gas stream discharged to the atmosphere to exceed 0.015 milligrams of total chromium per dry standard cubic meter (mg/dscm) of ventilation air (6.6 x 10 -6 grains per dry standard cubic foot (gr/dscf)), if the existing open surface hard chromium electroplating tank had an initial startup after December 16, 1993 or is located at a large, hard chromium electroplating facility; or
6.3.3.1.1.3 If a chemical fume suppressant containing a wetting agent is used to comply with 6.3.3.1.1 of this regulation, each owner or operator of an existing open surface hard chromium electroplating tank shall not allow the surface tensio
surface hard chromium electroplating tank had an initial startup after December 16, 1993 or is located at a large, hard chromium electroplating facility; or
6.3.3.1.1.3 If a chemical fume suppressant containing a wetting agent is used to comply with 6.3.3.1.1 of this regulation, each owner or operator of an existing open surface hard chromium electroplating tank shall not allow the surface tension of the electroplating bath contained within the open surface hard chromium electroplating tank to exceed 45 dynes per centimeter (dynes/cm) (3.1 × 10 -3 pound-force per foot (lb f /ft)) as measured by a stalagmometer or 35 dynes/cm (2.4 × 10 -3 lb f /ft) as measured by a tensiometer at any time during tank operation.
6.3.3.1.2 On and after September 19, 2014, each owner or operator of an existing affected open surface hard chromium electroplating tank shall control chromium emissions discharged to the atmosphere from that affected source by being in compliance with 6.3.3.1.2.1, 6.3.3.1.2.2, or 6.3.3.1.2.3 of this regulation.
6.3.3.1.2.1 Each owner or operator of an existing open surface hard chromium electroplating tank shall not allow the concentration of total chromium in the exhaust gas stream discharged to the atmosphere to exceed 0.015 milligrams of total chromium per dry standard cubic meter (mg/dscm) of ventilation air (6.6 x 10 -6 grains per dry standard cubic foot (gr/dscf)), if the existing open surface hard chromium electroplating tank had an initial startup on or before December 16, 1993 and is located at a small, hard chromium electroplating facility;
6.3.3.1.2.2 Each owner or operator of an existing open surface hard chromium electroplating tank shall not allow the concentration of total chromium in the exhaust gas stream discharged to the atmosphere to exceed 0.011 milligrams of total chromium per dry standard cubic meter (mg/dscm) of ventilation air (4.8 x 10 -6 grains per dry standard cubic foot (gr/dscf), if the existing open surface hard chromium electroplating tank had an initial startup after Decem
hard chromium electroplating tank shall not allow the concentration of total chromium in the exhaust gas stream discharged to the atmosphere to exceed 0.011 milligrams of total chromium per dry standard cubic meter (mg/dscm) of ventilation air (4.8 x 10 -6 grains per dry standard cubic foot (gr/dscf), if the existing open surface hard chromium electroplating tank had an initial startup after December 16, 1993 or is located at a large, hard chromium electroplating facility; or
6.3.3.1.2.3 If a chemical fume suppressant containing a wetting agent is used to comply with 6.3.3.1.2 of this regulation, each owner or operator of an existing open surface hard chromium electroplating tank shall not allow the surface tension of the electroplating bath contained within the open surface hard chromium electroplating tank to exceed 40 dynes per centimeter (dynes/cm) (2.8 × 10 -3 pound-force per foot (lb f /ft)) as measured by a stalagmometer or 33 dynes/cm (2.3 × 10 -3 lb f /ft) as measured by a tensiometer at any time during tank operation.
6.3.3.1.3 On and after September 11, 2013, each owner or operator of a new or reconstructed affected open surface hard chromium electroplating tank shall control chromium emissions discharged to the atmosphere from that affected source by being in compliance with 6.3.3.1.3.1 or 6.3.3.1.3.2 of this regulation.
6.3.3.1.3.1 Each owner or operator of a new or reconstructed open surface hard chromium electroplating tank shall not allow the concentration of total chromium in the exhaust gas stream discharged to the atmosphere to exceed 0.006 milligrams of total chromium per dry standard cubic meter (mg/dscm) of ventilation air (2.6 x 10 -6 grains per dry standard cubic foot (gr/dscf)) or
6.3.3.1.3.2 If a chemical fume suppressant containing a wetting agent is used to comply with 6.3.3.1.3 of this regulation, each owner or operator of a new or reconstructed open surface hard chromium electroplating tank shall not allow the surface tension of the electroplating bath contained within the open surfa
dscm) of ventilation air (2.6 x 10 -6 grains per dry standard cubic foot (gr/dscf)) or
6.3.3.1.3.2 If a chemical fume suppressant containing a wetting agent is used to comply with 6.3.3.1.3 of this regulation, each owner or operator of a new or reconstructed open surface hard chromium electroplating tank shall not allow the surface tension of the electroplating bath contained within the open surface hard chromium electroplating tank to exceed 40 dynes per centimeter (dynes/cm) (2.8 × 10 -3 pound-force per foot (lb f /ft)) as measured by a stalagmometer or 33 dynes/cm (2.3 × 10 -3 lb f /ft) as measured by a tensiometer at any time during tank operation.
6.3.3.1.4 On and after September 19, 2015, each owner or operator of an existing, new, or reconstructed affected open surface hard chromium electroplating tank shall not add PFOS-based fume suppressants to any affected open surface hard chromium electroplating tank.
6.3.3.2 Standards for enclosed hard chromium electroplating tanks. During tank operation, each owner or operator of an existing, new, or reconstructed affected enclosed hard chromium electroplating tank shall be in compliance with the applicable requirements of 6.3.3.2.1, 6.3.3.2.2, 6.3.3.2.3, and 6.3.3.2.4 of this regulation.
6.3.3.2.1 Prior to September 19, 2014, each owner or operator of an existing affected enclosed hard chromium electroplating tank shall control chromium emissions discharged to the atmosphere from that affected source by being in compliance with 6.3.3.2.1.1, 6.3.3.2.1.2, 6.3.3.2.1.3, 6.3.3.2.1.4, or 6.3.3.2.1.5 of this regulation
of 6.3.3.2.1, 6.3.3.2.2, 6.3.3.2.3, and 6.3.3.2.4 of this regulation.
6.3.3.2.1 Prior to September 19, 2014, each owner or operator of an existing affected enclosed hard chromium electroplating tank shall control chromium emissions discharged to the atmosphere from that affected source by being in compliance with 6.3.3.2.1.1, 6.3.3.2.1.2, 6.3.3.2.1.3, 6.3.3.2.1.4, or 6.3.3.2.1.5 of this regulation.
6.3.3.2.1.1 Each owner or operator of an existing enclosed hard chromium electroplating tank shall not allow the concentration of total chromium in the exhaust gas stream discharged to the atmosphere to exceed 0.03 milligrams of total chromium per dry standard cubic meter (mg/dscm) of ventilation air (1.3 x 10 -5 grains per dry standard cubic foot (gr/dscf)), if the existing enclosed hard chromium electroplating tank had an initial startup on or before December 16, 1993 and is located at a small, hard chromium electroplating facility;
6.3.3.2.1.2 Each owner or operator of an existing enclosed hard chromium electroplating tank shall not allow the concentration of total chromium in the exhaust gas stream discharged to the atmosphere to exceed 0.015 milligrams of total chromium per dry standard cubic meter (mg/dscm) of ventilation air (6.6 x 10 -6 grains per dry standard cubic foot (gr/dscf)), if the existing enclosed hard chromium electroplating tank had an initial startup after December 16, 1993 or is located at a large, hard chromium electroplating facility;
6.3.3.2.1.3 If a chemical fume suppressant containing a wetting agent is used to comply with 6.3.3.2.1 of this regulation, each owner or operator of an existing enclosed hard chromium electroplating tank shall not allow the surface tension of the electroplating bath contained within the enclosed hard chromium electroplating tank to exceed 45 dynes per centimeter (dynes/cm) (3.1 × 10 -3 pound-force per foot (lb f /ft)) as measured by a stalagmometer or 35 dynes/cm (2.4 × 10 -3 lb f /ft) as measured by a tensiometer at any time during tank operation;
6.3.3.2.1.4 Each
ard chromium electroplating tank shall not allow the surface tension of the electroplating bath contained within the enclosed hard chromium electroplating tank to exceed 45 dynes per centimeter (dynes/cm) (3.1 × 10 -3 pound-force per foot (lb f /ft)) as measured by a stalagmometer or 35 dynes/cm (2.4 × 10 -3 lb f /ft) as measured by a tensiometer at any time during tank operation;
6.3.3.2.1.4 Each owner or operator of an existing enclosed hard chromium electroplating tank shall not allow the mass emission rate of total chromium in the exhaust gas stream discharged to the atmosphere to exceed the maximum allowable mass emission rate determined by using the calculation procedure in 6.5.6.2 of this regulation, if the existing enclosed hard chromium electroplating tank had an initial startup on or before December 16, 1993 and is located at a small, hard chromium electroplating facility; or
6.3.3.2.1.5 Each owner or operator of an existing enclosed hard chromium electroplating tank shall not allow the mass emission rate of total chromium in the exhaust gas stream discharged to the atmosphere to exceed the maximum allowable mass emission rate determined by using the calculation procedure in 6.5.6.1 of this regulation, if the existing enclosed hard chromium electroplating tank had an initial startup after December 16, 1993 or is located at a large, hard chromium electroplating facility.
6.3.3.2.2 On and after September 19, 2014, each owner or operator of an existing affected enclosed hard chromium electroplating tank shall control chromium emissions discharged to the atmosphere from that affected source by being in compliance with 6.3.3.2.2.1, 6.3.3.2.2.2, 6.3.3.2.2.3, 6.3.3.2.2.4, or 6.3.3.2.2.5 of this regulation
or is located at a large, hard chromium electroplating facility.
6.3.3.2.2 On and after September 19, 2014, each owner or operator of an existing affected enclosed hard chromium electroplating tank shall control chromium emissions discharged to the atmosphere from that affected source by being in compliance with 6.3.3.2.2.1, 6.3.3.2.2.2, 6.3.3.2.2.3, 6.3.3.2.2.4, or 6.3.3.2.2.5 of this regulation.
6.3.3.2.2.1 Each owner or operator of an existing enclosed hard chromium electroplating tank shall not allow the concentration of total chromium in the exhaust gas stream discharged to the atmosphere to exceed 0.015 milligrams of total chromium per dry standard cubic meter (mg/dscm) of ventilation air (6.6 x 10 -6 grains per dry standard cubic foot (gr/dscf)), if the existing enclosed hard chromium electroplating tank had an initial startup on or before December 16, 1993 and is located at a small, hard chromium electroplating facility;
6.3.3.2.2.2 Each owner or operator of an existing enclosed hard chromium electroplating tank shall not allow the concentration of total chromium in the exhaust gas stream discharged to the atmosphere to exceed 0.011 milligrams of total chromium per dry standard cubic meter (mg/dscm) of ventilation air (4.8 x 10 -6 grains per dry standard cubic foot (gr/dscf), if the existing enclosed hard chromium electroplating tank had an initial startup after December 16, 1993 or is located at a large, hard chromium electroplating facility;
6.3.3.2.2.3 If a chemical fume suppressant containing a wetting agent is used to comply with 6.3.3.2.2 of this regulation, each owner or operator of an existing enclosed hard chromium electroplating tank shall not allow the surface tension of the electroplating bath contained within the enclosed hard chromium electroplating tank to exceed 40 dynes per centimeter (dynes/cm) (2.8 × 10 -3 pound-force per foot (lb f /ft)) as measured by a stalagmometer or 33 dynes/cm (2.3 × 10 -3 lb f /ft) as measured by a tensiometer at any time during tank operation;
6.3.3.2.2.4 Each
ard chromium electroplating tank shall not allow the surface tension of the electroplating bath contained within the enclosed hard chromium electroplating tank to exceed 40 dynes per centimeter (dynes/cm) (2.8 × 10 -3 pound-force per foot (lb f /ft)) as measured by a stalagmometer or 33 dynes/cm (2.3 × 10 -3 lb f /ft) as measured by a tensiometer at any time during tank operation;
6.3.3.2.2.4 Each owner or operator of an existing enclosed hard chromium electroplating tank shall not allow the mass emission rate of total chromium in the exhaust gas stream discharged to the atmosphere to exceed the maximum allowable mass emission rate determined by using the calculation procedure in 6.5.6.4 of this regulation, if the existing enclosed hard chromium electroplating tank had an initial startup on or before December 16, 1993 and is located at a small, hard chromium electroplating facility; or
6.3.3.2.2.5 Each owner or operator of an existing enclosed hard chromium electroplating tank shall not allow the mass emission rate of total chromium in the exhaust gas stream discharged to the atmosphere to exceed the maximum allowable mass emission rate determined by using the calculation procedure in 6.5.6.3 of this regulation, if the existing enclosed hard chromium electroplating tank had an initial startup after December 16, 1993 or is located at a large, hard chromium electroplating facility.
6.3.3.2.3 On and after September 11, 2013, each owner or operator of a new or reconstructed affected enclosed hard chromium electroplating tank shall control chromium emissions discharged to the atmosphere from that affected source by being in compliance with 6.3.3.2.3.1, 6.3.3.2.3.2, or 6.3.3.2.3.3 of this regulation
cember 16, 1993 or is located at a large, hard chromium electroplating facility.
6.3.3.2.3 On and after September 11, 2013, each owner or operator of a new or reconstructed affected enclosed hard chromium electroplating tank shall control chromium emissions discharged to the atmosphere from that affected source by being in compliance with 6.3.3.2.3.1, 6.3.3.2.3.2, or 6.3.3.2.3.3 of this regulation.
6.3.3.2.3.1 Each owner or operator of a new or reconstructed enclosed hard chromium electroplating tank shall not allow the concentration of total chromium in the exhaust gas stream discharged to the atmosphere to exceed 0.006 milligrams of total chromium per dry standard cubic meter (mg/dscm) of ventilation air (2.6 x 10 -6 grains per dry standard cubic foot (gr/dscf));
6.3.3.2.3.2 If a chemical fume suppressant containing a wetting agent is used to comply with 6.3.3.2.3 of this regulation, each owner or operator of a new or reconstructed enclosed hard chromium electroplating tank shall not allow the surface tension of the electroplating bath contained within the enclosed hard chromium electroplating tank to exceed 40 dynes per centimeter (dynes/cm) (2.8 × 10 -3 pound-force per foot (lb f /ft)) as measured by a stalagmometer or 33 dynes/cm (2.3 × 10 -3 lb f /ft) as measured by a tensiometer at any time during tank operation; or
6.3.3.2.3.3 Each owner or operator of a new or reconstructed enclosed hard chromium electroplating tank shall not allow the mass emission rate of total chromium in the exhaust gas stream discharged to the atmosphere to exceed the maximum allowable mass emission rate determined by using the calculation procedure in 6.5.6.5 of this regulation.
6.3.3.2.4 On and after September 19, 2015, each owner or operator of an existing, new, or reconstructed affected enclosed hard chromium electroplating tank shall not add PFOS-based fume suppressants to any affected enclosed hard chromium electroplating tank.
6.3.3.2.5 [Reserved]
6.3.3.3 Size demonstration of a hard chromium electroplating facility
lculation procedure in 6.5.6.5 of this regulation.
6.3.3.2.4 On and after September 19, 2015, each owner or operator of an existing, new, or reconstructed affected enclosed hard chromium electroplating tank shall not add PFOS-based fume suppressants to any affected enclosed hard chromium electroplating tank.
6.3.3.2.5 [Reserved]
6.3.3.3 Size demonstration of a hard chromium electroplating facility.
6.3.3.3.1 An owner or operator may demonstrate the size of a hard chromium electroplating facility through the definitions in 6.2.1 of this regulation. Alternatively, an owner or operator of a facility with a maximum cumulative potential rectifier capacity of 60 million amp-hr/yr or more may be considered small if the actual cumulative rectifier capacity is less than 60 million amp-hr/yr as demonstrated using the following procedures:
6.3.3.3.1.1 If records show that the facility’s previous annual actual rectifier capacity was less than 60 million amp-hr/yr, by using nonresettable ampere-hr meters and keeping monthly records of actual ampere-hr usage for each 12-month rolling period following the compliance date in accordance with 6.7.2.12 of this regulation. The actual cumulative rectifier capacity for the previous 12-month rolling period shall be tabulated monthly by adding the capacity for the current month to the capacities for the previous 11 months or
6.3.3.3.1.2 By accepting a Federally-enforceable limit on the maximum cumulative potential rectifier capacity of a hard chromium electroplating facility and by maintaining monthly records in accordance with 6.7.2.12 of this regulation to demonstrate that the limit has not been exceeded. The actual cumulative rectifier capacity for the previous 12-month rolling period shall be tabulated monthly by adding the capacity for the current month to the capacities for the previous 11 months
tial rectifier capacity of a hard chromium electroplating facility and by maintaining monthly records in accordance with 6.7.2.12 of this regulation to demonstrate that the limit has not been exceeded. The actual cumulative rectifier capacity for the previous 12-month rolling period shall be tabulated monthly by adding the capacity for the current month to the capacities for the previous 11 months.
6.3.3.3.2 Once the monthly records required to be kept in 6.3.3.3.1 and 6.7.2.12 of this regulation show that the actual cumulative rectifier capacity over the previous 12-month rolling period corresponds to the large designation, the owner or operator is subject to the applicable emission limitation identified in 6.3.3.1.1.2, 6.3.3.1.2.2, 6.3.3.2.1.2, 6.3.3.2.1.5, 6.3.3.2.2.2, and 6.3.3.2.2.5 of this regulation, in accordance with the compliance schedule in 6.4.1.5 of this regulation.
6.3.4 Standards for decorative chromium electroplating tanks using a chromic acid bath and chromium anodizing tanks. During tank operation, each owner or operator of an existing, new, or reconstructed affected decorative chromium electroplating tank using a chromic acid bath or affected chromium anodizing tank shall be in compliance with the applicable requirements of 6.3.4.1, 6.3.4.2, 6.3.4.3, and 6.3.4.4 of this regulation.
6.3.4.1 Prior to September 19, 2014, each owner or operator of an existing affected decorative chromium electroplating tank using a chromic acid bath or an existing affected chromium anodizing tank shall control chromium emissions discharged to the atmosphere from that affected source by being in compliance with 6.3.4.1.1 or 6.3.4.1.2 of this regulation
.2, 6.3.4.3, and 6.3.4.4 of this regulation.
6.3.4.1 Prior to September 19, 2014, each owner or operator of an existing affected decorative chromium electroplating tank using a chromic acid bath or an existing affected chromium anodizing tank shall control chromium emissions discharged to the atmosphere from that affected source by being in compliance with 6.3.4.1.1 or 6.3.4.1.2 of this regulation.
6.3.4.1.1 Each owner or operator of an existing decorative chromium electroplating tank using a chromic acid bath or an existing chromium anodizing tank shall not allow the concentration of total chromium in the exhaust gas stream discharged to the atmosphere to exceed 0.01 milligrams of total chromium per dry standard cubic meter (mg/dscm) of ventilation air (4.4 x 10 -6 grains per dry standard cubic foot (gr/dscf)) or
6.3.4.1.2 If a chemical fume suppressant containing a wetting agent is used to comply with 6.3.4.1 of this regulation, each owner or operator of an existing decorative chromium electroplating tank using a chromic acid bath or an existing chromium anodizing tank shall not allow the surface tension of the electroplating bath contained within the decorative chromium electroplating tank using a chromic acid bath or the chromium anodizing tank to exceed 45 dynes per centimeter (dynes/cm) (3.1 × 10 -3 pound-force per foot (lb f /ft)) as measured by a stalagmometer or 35 dynes/cm (2.4 × 10 -3 lb f /ft) as measured by a tensiometer at any time during tank operation.
6.3.4.2 On and after September 19, 2014, each owner or operator of an existing affected decorative chromium electroplating tank using a chromic acid bath or an existing affected chromium anodizing tank shall control chromium emissions discharged to the atmosphere from that affected source by being in compliance with 6.3.4.2.1 or 6.3.4.2.2 of this regulation
meter at any time during tank operation.
6.3.4.2 On and after September 19, 2014, each owner or operator of an existing affected decorative chromium electroplating tank using a chromic acid bath or an existing affected chromium anodizing tank shall control chromium emissions discharged to the atmosphere from that affected source by being in compliance with 6.3.4.2.1 or 6.3.4.2.2 of this regulation.
6.3.4.2.1 Each owner or operator of an existing decorative chromium electroplating tank using a chromic acid bath or an existing chromium anodizing tank shall not allow the concentration of total chromium in the exhaust gas stream discharged to the atmosphere to exceed 0.007 milligrams of total chromium per dry standard cubic meter (mg/dscm) of ventilation air (3.1 x 10 -6 grains per dry standard cubic foot (gr/dscf)) or
6.3.4.2.2 If a chemical fume suppressant containing a wetting agent is used to comply with 6.3.4.2 of this regulation, each owner or operator of an existing decorative chromium electroplating tank using a chromic acid bath or an existing chromium anodizing tank shall not allow the surface tension of the electroplating bath contained within the decorative chromium electroplating tank using a chromic acid bath or the chromium anodizing tank to exceed 40 dynes per centimeter (dynes/cm) (2.8 × 10 -3 pound-force per foot (lb f /ft)) as measured by a stalagmometer or 33 dynes/cm (2.3 × 10 -3 lb f /ft) as measured by a tensiometer at any time during tank operation.
6.3.4.3 On and after September 11, 2013, each owner or operator of a new or reconstructed affected decorative chromium electroplating tank using a chromic acid bath or a new or reconstructed chromium anodizing tank shall control chromium emissions discharged to the atmosphere from that affected source by being in compliance with 6.3.4.3.1 or 6.3.4.3.2 of this regulation
time during tank operation.
6.3.4.3 On and after September 11, 2013, each owner or operator of a new or reconstructed affected decorative chromium electroplating tank using a chromic acid bath or a new or reconstructed chromium anodizing tank shall control chromium emissions discharged to the atmosphere from that affected source by being in compliance with 6.3.4.3.1 or 6.3.4.3.2 of this regulation.
6.3.4.3.1 Each owner or operator of a new or reconstructed decorative chromium electroplating tank using a chromic acid bath or a new or reconstructed chromium anodizing tank shall not allow the concentration of total chromium in the exhaust gas stream discharged to the atmosphere to exceed 0.006 milligrams of total chromium per dry standard cubic meter (mg/dscm) of ventilation air (2.6 x 10 -6 grains per dry standard cubic foot (gr/dscf)) or
6.3.4.3.2 If a chemical fume suppressant containing a wetting agent is used to comply with 6.3.4.3 of this regulation, each owner or operator of a new or reconstructed decorative chromium electroplating tank using a chromic acid bath or a new or reconstructed chromium anodizing tank shall not allow the surface tension of the electroplating bath contained within the decorative chromium electroplating tank using a chromic acid bath or the chromium anodizing tank to exceed 40 dynes per centimeter (dynes/cm) (2.8 × 10 -3 pound-force per foot (lb f /ft)) as measured by a stalagmometer or 33 dynes/cm (2.3 × 10 -3 lb f /ft) as measured by a tensiometer at any time during tank operation.
6.3.4.4 On and after September 19, 2015, each owner or operator of an existing, new, or reconstructed affected decorative chromium electroplating tank using a chromic acid bath or an existing, new, or reconstructed chromium anodizing tank shall not add PFOS-based fume suppressants to any affected decorative chromium electroplating tank using a chromic acid bath or any affected chromium anodizing tank.
6.3.5 Standards for decorative chromium electroplating tanks using a trivalent chromium bath
cted affected decorative chromium electroplating tank using a chromic acid bath or an existing, new, or reconstructed chromium anodizing tank shall not add PFOS-based fume suppressants to any affected decorative chromium electroplating tank using a chromic acid bath or any affected chromium anodizing tank.
6.3.5 Standards for decorative chromium electroplating tanks using a trivalent chromium bath.
6.3.5.1 Each owner or operator of an existing, new, or reconstructed decorative chromium electroplating tank that uses a trivalent chromium bath that incorporates a wetting agent as a bath ingredient is subject to the recordkeeping and reporting requirements in 6.7.2.14 and 6.8.9 of this regulation, but are not subject to the operation and maintenance procedure requirements in 6.3.6 of this regulation, or the continuous compliance monitoring requirements in 6.4.3 of this regulation. The wetting agent shall be an ingredient in the trivalent chromium bath components purchased as a package.
6.3.5.2 Each owner or operator of an existing, new, or reconstructed decorative chromium electroplating tank that uses a trivalent chromium bath that does not incorporate a wetting agent as a bath ingredient is subject to the standards in 6.3.4 of this regulation.
6.3.5.3 Each owner or operator of an existing, new, or reconstructed decorative chromium electroplating tank that had been using a trivalent chromium bath that incorporates a wetting agent and ceases using this type of bath shall fulfill the reporting requirements in 6.8.9.3 of this regulation and comply with the applicable emission limitation within the timeframe specified in 6.4.1.7 of this regulation.
6.3.5.4 On and after September 19, 2015, each owner or operator of an existing, new, or reconstructed affected decorative chromium electroplating tank that uses a trivalent chromium bath shall not add PFOS-based fume suppressants to any affected decorative chromium electroplating tank that uses a trivalent chromium bath.
6.3.6 Operation and maintenance procedures
ied in 6.4.1.7 of this regulation.
6.3.5.4 On and after September 19, 2015, each owner or operator of an existing, new, or reconstructed affected decorative chromium electroplating tank that uses a trivalent chromium bath shall not add PFOS-based fume suppressants to any affected decorative chromium electroplating tank that uses a trivalent chromium bath.
6.3.6 Operation and maintenance procedures. All owners or operators subject to the standards in 6.3.3 and 6.3.4 of this regulation are subject to these operation and maintenance procedures.
6.3.6.1 Requirements. The owner or operator of an existing, new, or reconstructed affected source shall:
6.3.6.1.1 At all times, including periods of startup, shutdown, and malfunction, each owner or operator shall operate and maintain any affected source, including associated air pollution control devices and monitoring equipment, in a manner consistent with good air pollution control practices and consistent with the operation and maintenance plan required in 6.3.6.3 of this regulation.
6.3.6.1.2 Each owner or operator shall correct malfunctions as soon as practicable after their occurrence in accordance with the operation and maintenance plan required in 6.3.6.3 of this regulation.
6.3.6.1.3 The operation and maintenance requirements established in 6.3.6 of this regulation are enforceable independent of emissions limitations or other requirements in 6.0 of this regulation.
6.3.6.2 Review and revision of operating and maintenance procedures.
6.3.6.2.1 Determination of whether acceptable operation and maintenance procedures are being used will be based on information available to the Department, which may include, but is not limited to, monitoring results; review of the operation and maintenance plan, procedures, and records; and inspection of the source
s regulation.
6.3.6.2 Review and revision of operating and maintenance procedures.
6.3.6.2.1 Determination of whether acceptable operation and maintenance procedures are being used will be based on information available to the Department, which may include, but is not limited to, monitoring results; review of the operation and maintenance plan, procedures, and records; and inspection of the source.
6.3.6.2.2 Based on the results of a determination made under 6.3.6.2.1 of this regulation, the Department may require that an owner or operator of an affected source make changes to the operation and maintenance plan required in 6.3.6.3 of this regulation for that source. Revisions may be required if the Department finds that the plan:
6.3.6.2.2.1 Does not address a malfunction that has occurred;
6.3.6.2.2.2 Fails to provide for the proper operation of the process equipment, the air pollution control techniques, or the monitoring equipment during a malfunction in a manner consistent with good air pollution control practices; or
6.3.6.2.2.3 Does not provide adequate procedures for correcting malfunctioning process equipment, air pollution control techniques, or monitoring equipment as quickly as practicable.
6.3.6.3 Operation and maintenance plan.
6.3.6.3.1 The owner or operator of an affected source subject to the operation and maintenance procedures in 6.3.6 of this regulation shall prepare an operation and maintenance plan to be implemented no later than the applicable compliance date. The plan shall be incorporated by reference into the source’s Title V operating permit, if and when a Title V operating permit is required
intenance plan.
6.3.6.3.1 The owner or operator of an affected source subject to the operation and maintenance procedures in 6.3.6 of this regulation shall prepare an operation and maintenance plan to be implemented no later than the applicable compliance date. The plan shall be incorporated by reference into the source’s Title V operating permit, if and when a Title V operating permit is required. The plan shall include the following elements:
6.3.6.3.1.1 The plan shall specify the operation and maintenance criteria for the affected source, the add-on air pollution control device (if such a device is used to comply with the emission limitations), and the process and control system monitoring equipment, and shall include a standardized checklist to document the operation and maintenance of this equipment;
6.3.6.3.1.2 For sources using an add-on air pollution control device or monitoring equipment to comply with 6.0 of this regulation, the plan shall incorporate the operation and maintenance procedures for that device or monitoring equipment, as identified in Table 6-1 of this regulation, if the specific equipment used is identified in Table 6-1;
6.3.6.3.1.3 If the specific equipment used is not identified in Table 6-1 of this regulation, the plan shall incorporate proposed operation and maintenance procedures. These proposed operation and maintenance procedures shall be submitted to the Administrator (with copy to the Department) for approval as part of the submittal required in 6.4.4 of this regulation;
6.3.6.3.1.4 The plan shall specify procedures to be followed to ensure that equipment or process malfunctions due to poor maintenance or other preventable conditions do not occur; and
6.3.6.3.1.5 The plan shall include a systematic procedure for identifying malfunctions of process equipment, add-on air pollution control devices, and process and control system monitoring equipment and for implementing corrective actions to address such malfunctions
followed to ensure that equipment or process malfunctions due to poor maintenance or other preventable conditions do not occur; and
6.3.6.3.1.5 The plan shall include a systematic procedure for identifying malfunctions of process equipment, add-on air pollution control devices, and process and control system monitoring equipment and for implementing corrective actions to address such malfunctions.
6.3.6.3.1.6 The plan shall include housekeeping procedures, as specified in Table 6-2 of this regulation.
6.3.6.3.2 If the operation and maintenance plan fails to address or inadequately addresses an event that meets the characteristics of a malfunction at the time the plan is initially developed, the owner or operator shall revise the operation and maintenance plan within 45 days after such an event occurs. The revised plan shall include procedures for operating and maintaining the process equipment, add-on air pollution control device, or monitoring equipment during similar malfunction events, and a program for corrective action for such events.
6.3.6.3.3 Recordkeeping associated with the operation and maintenance plan is identified in 6.3.6.3.5 and 6.7.2 of this regulation. Reporting associated with the operation and maintenance plan is identified in 6.3.6.3.4, 6.8.7, and 6.8.8 of this regulation.
6.3.6.3.4 If actions taken by the owner or operator during periods of malfunction are inconsistent with the procedures specified in the operation and maintenance plan required in 6.3.6.3.1 of this regulation, the owner or operator shall record the actions taken for that event and shall report by phone such actions within two working days after commencing actions inconsistent with the plan. This report shall be followed by a letter within seven working days after the end of the event, unless the owner or operator makes alternative reporting arrangements, in advance, with the Department
this regulation, the owner or operator shall record the actions taken for that event and shall report by phone such actions within two working days after commencing actions inconsistent with the plan. This report shall be followed by a letter within seven working days after the end of the event, unless the owner or operator makes alternative reporting arrangements, in advance, with the Department.
6.3.6.3.5 The owner or operator shall keep the written operation and maintenance plan on record after it is developed to be made available for inspection, upon request, by the Department for the life of the affected source or until the source is no longer subject to the provisions of 6.0 of this regulation. In addition, if the operation and maintenance plan is revised, the owner or operator shall keep previous (i.e., superseded) versions of the operation and maintenance plan on record to be made available for inspection, upon request, by the Department for a period of five years after each revision to the plan.
6.3.6.3.6 To satisfy the requirements in 6.3.6.3 of this regulation, the owner or operator may use applicable standard operating procedure (SOP) manuals, Occupational Safety and Health Administration (OSHA) plans, or other existing plans, provided the alternative plans meet the requirements in 6.3 of this regulation.
6.3.7 The standards in 6.3 of this regulation that apply to chromic acid baths shall not be met by using a reducing agent to change the form of chromium from hexavalent to trivalent.
Table 6-1 -- Summary of Operation and Maintenance Procedures
a If greater than 50% of the scrubber water is drained (e.g., for maintenance purposes), makeup water may be added to the scrubber basin.
b For horizontal-flow scrubbers, top is defined as the section of the unit directly above the packing media such that the makeup water would flow perpendicular to the air flow through the packing
lent.
Table 6-1 -- Summary of Operation and Maintenance Procedures
a If greater than 50% of the scrubber water is drained (e.g., for maintenance purposes), makeup water may be added to the scrubber basin.
b For horizontal-flow scrubbers, top is defined as the section of the unit directly above the packing media such that the makeup water would flow perpendicular to the air flow through the packing. For vertical-flow units, the top is defined as the area downstream of the packing material such that the makeup water would flow countercurrent to the air flow through the unit.
c Operating and maintenance procedures for the control device installed upstream of the fiber-bed mist eliminator to prevent plugging do not apply as long as the operating and maintenance procedures for the fiber-bed unit are followed.
6.4 Compliance provisions.
6.4.1 Compliance dates.
6.4.1.1 The owner or operator of an existing affected source shall be in compliance with the applicable provisions of 6.0 of this regulation, except for the emission limitations in 6.3.3, 6.3.4, and 6.3.5 of this regulation, by no later than September 11, 2013 and shall be in compliance with the emission limitations specified in 6.4.1.1.1 and 6.4.1.1.2 of this regulation by no later than September 11, 2013.
6.4.1.1.1 Prior to September 19, 2014, the owner or operator of an existing affected source shall be in compliance with the applicable emission limitations in 6.3.3.1.1, 6.3.3.2.1, 6.3.3.3, 6.3.4.1, and 6.3.5.1 through 6.3.5.3 of this regulation.
6.4.1.1.2 On and after September 19, 2014, the owner or operator of an existing affected source shall be in compliance with the applicable emission limitations in 6.3.3.1.2, 6.3.3.2.2, 6.3.3.3, 6.3.4.2, and 6.3.5.1 through 6.3.5.3 of this regulation.
6.4.1.2 The owner or operator of a new or reconstructed affected source shall be in compliance with the applicable provisions of 6.0 of this regulation by no later than September 11, 2013 or immediately upon startup of the source, whichever is later
l be in compliance with the applicable emission limitations in 6.3.3.1.2, 6.3.3.2.2, 6.3.3.3, 6.3.4.2, and 6.3.5.1 through 6.3.5.3 of this regulation.
6.4.1.2 The owner or operator of a new or reconstructed affected source shall be in compliance with the applicable provisions of 6.0 of this regulation by no later than September 11, 2013 or immediately upon startup of the source, whichever is later.
6.4.1.3 The owner or operator of an existing area source that increases actual or potential emissions of hazardous air pollutants such that the area source becomes a major source shall comply with the provisions for existing major sources, including the reporting provisions in 6.8.7 of this regulation, immediately upon becoming a major source.
6.4.1.4 The owner or operator of a new area source (i.e., an area source for which construction or reconstruction was commenced after February 8, 2012) that increases actual or potential emissions of hazardous air pollutants such that the area source becomes a major source shall comply with the provisions for new major sources, including the reporting provisions in 6.8.7 of this regulation, immediately upon becoming a major source.
6.4.1.5 An owner or operator of an existing hard chromium electroplating tank or tanks located at a small, hard chromium electroplating facility that increases its maximum cumulative potential rectifier capacity, or its actual cumulative rectifier capacity, such that the facility becomes a large, hard chromium electroplating facility shall comply with the appropriate emission limitation identified in 6.3.3.1.1.2, 6.3.3.1.2.2, 6.3.3.2.1.2, 6.3.3.2.1.5, 6.3.3.2.2.2, and 6.3.3.2.2.5 of this regulation no later than one year after the month in which monthly records required by 6.3.3.3.1 and 6.7.2.12 of this regulation show that the large designation is met.
6.4.1.6 Request for an extension of compliance
ium electroplating facility shall comply with the appropriate emission limitation identified in 6.3.3.1.1.2, 6.3.3.1.2.2, 6.3.3.2.1.2, 6.3.3.2.1.5, 6.3.3.2.2.2, and 6.3.3.2.2.5 of this regulation no later than one year after the month in which monthly records required by 6.3.3.3.1 and 6.7.2.12 of this regulation show that the large designation is met.
6.4.1.6 Request for an extension of compliance. An owner or operator of an affected source or sources that requests an extension of compliance shall do so in accordance with the applicable provisions of 3.6.9 of this regulation. When the owner or operator is requesting the extension for more than one affected source located at the facility, then only one request may be submitted for all affected sources at the facility.
6.4.1.6.1 The owner or operator of an existing affected source who is unable to comply with a relevant standard under 6.0 of this regulation may request that the Department grant an extension allowing the owner or operator up to one additional year to comply with the standard for the affected source. The owner or operator of an affected source who has requested an extension of compliance under 6.4.1.6 of this regulation and is otherwise required to obtain a Title V permit for the source shall apply for such permit or apply to have the Title V permit revised to incorporate the conditions of the extension of compliance. The conditions of an extension of compliance granted under 6.4.1.6 will be incorporated into the owner or operator's Title V permit for the affected source or sources according to the provisions of 7 DE Admin. Code 1130 .
6.4.1.6.2 Any request for an extension of compliance under 6.4.1.6 of this regulation shall be submitted in writing to the Department not later than 6 months before the affected source's compliance date as specified in 6.4.1 of this regulation
6 will be incorporated into the owner or operator's Title V permit for the affected source or sources according to the provisions of 7 DE Admin. Code 1130 .
6.4.1.6.2 Any request for an extension of compliance under 6.4.1.6 of this regulation shall be submitted in writing to the Department not later than 6 months before the affected source's compliance date as specified in 6.4.1 of this regulation.
6.4.1.7 An owner or operator of a decorative chromium electroplating tank that uses a trivalent chromium bath that incorporates a wetting agent, and that ceases using the trivalent chromium process, shall comply with the emission limitation now applicable to the tank within one year of switching bath operation.
6.4.1.8 No later than September 11, 2013, the owner or operator of an affected source that is subject to the standards in 6.3.3 or 6.3.4 of this regulation shall implement the housekeeping procedures specified in Table 6-2 of this regulation.
6.4.2 Methods to demonstrate initial compliance.
6.4.2.1 Except as provided in 6.4.2.2 and 6.4.2.3 of this regulation, an owner or operator of an affected source subject to the requirements of 6.0 of this regulation is required to conduct an initial performance test as required under 3.7 of this regulation using the procedures and test methods listed in 6.5 and 3.7 of this regulation.
6.4.2.2 If the owner or operator of an affected source meets all of the following criteria, an initial performance test is not required to be conducted under 6.0 of this regulation:
6.4.2.2.1 The affected source is a hard chromium electroplating tank, a decorative chromium electroplating tank or a chromium anodizing tank;
6.4.2.2.2 A wetting agent is used in the plating or anodizing bath to inhibit chromium emissions from the affected source; and
6.4.2.2.3 The owner or operator complies with the applicable surface tension limit in 6.3.3.1.1.3, 6.3.3.1.2.3, 6.3.3.1.3.2, 6.3.3.2.1.3, 6.3.3.2.2.3, 6.3.3.2.3.2, 6.3.4.1.2, 6.3.4.2.2, or 6.3.4.3.2 of this regulation as demonstrated through the conti
omium anodizing tank;
6.4.2.2.2 A wetting agent is used in the plating or anodizing bath to inhibit chromium emissions from the affected source; and
6.4.2.2.3 The owner or operator complies with the applicable surface tension limit in 6.3.3.1.1.3, 6.3.3.1.2.3, 6.3.3.1.3.2, 6.3.3.2.1.3, 6.3.3.2.2.3, 6.3.3.2.3.2, 6.3.4.1.2, 6.3.4.2.2, or 6.3.4.3.2 of this regulation as demonstrated through the continuous compliance monitoring required in 6.4.3.5.2 of this regulation.
6.4.2.3 If the affected source is a decorative chromium electroplating tank using a trivalent chromium bath, and the owner or operator is subject to the provisions of 6.3.5 of this regulation, an initial performance test is not required to be conducted under 6.0 of this regulation.
6.4.3 Monitoring to demonstrate continuous compliance. The owner or operator of an affected source subject to the emission limitations of 6.0 of this regulation shall conduct monitoring according to the type of air pollution control technique that is used to comply with the emission limitation. The monitoring required to demonstrate continuous compliance with the emission limitations is identified in 6.4 of this regulation for the air pollution control techniques expected to be used by the owners or operators of affected sources. As an alternative to the daily monitoring, the owner or operator of an affected source may install a continuous pressure monitoring system.
6.4.3.1 Composite mesh-pad systems
required to demonstrate continuous compliance with the emission limitations is identified in 6.4 of this regulation for the air pollution control techniques expected to be used by the owners or operators of affected sources. As an alternative to the daily monitoring, the owner or operator of an affected source may install a continuous pressure monitoring system.
6.4.3.1 Composite mesh-pad systems.
6.4.3.1.1 During the initial performance test, the owner or operator of an affected source, or a group of affected sources under common control, complying with the emission limitations in 6.3 of this regulation through the use of a composite mesh-pad system shall determine the outlet chromium concentration using the test methods and procedures in 6.5.3 of this regulation, and shall establish as a site-specific operating parameter the pressure drop across the system, setting the value that corresponds to compliance with the applicable emission limitation, using the procedures in 6.5.4.5 of this regulation. An owner or operator may conduct multiple performance tests to establish a range of compliant pressure drop values, or may set as the compliant value the average pressure drop measured over the three test runs of one performance test and accept ±1 inch of water column from this value as the compliant range.
6.4.3.1.2 On and after the date on which the initial performance test is required to be completed under 3.7 of this regulation, the owner or operator of an affected source, or group of affected sources under common control, shall monitor and record the pressure drop across the composite mesh-pad system once each day that any affected source is operating. To be in compliance with the standards, the composite mesh-pad system shall be operated within ±1 inch of water column of the pressure drop value established during the initial performance test, or shall be operated within the range of compliant values for pressure drop established during multiple performance tests
the composite mesh-pad system once each day that any affected source is operating. To be in compliance with the standards, the composite mesh-pad system shall be operated within ±1 inch of water column of the pressure drop value established during the initial performance test, or shall be operated within the range of compliant values for pressure drop established during multiple performance tests.
6.4.3.1.3 The owner or operator of an affected source complying with the emission limitations in 6.3 of this regulation through the use of a composite mesh-pad system may repeat the performance test and establish as a new site-specific operating parameter the pressure drop across the composite mesh-pad system according to the requirements in 6.4.3.1.1 or 6.4.3.1.2 of this regulation. To establish a new site-specific operating parameter for pressure drop, the owner or operator shall satisfy the requirements specified in 6.4.3.1.3.1 through 6.4.3.1.3.4 of this regulation.
6.4.3.1.3.1 Determine the outlet chromium concentration using the test methods and procedures in 6.5.3 of this regulation;
6.4.3.1.3.2 Establish the site-specific operating parameter value using the procedures in 6.5.4.5 of this regulation;
6.4.3.1.3.3 Satisfy the recordkeeping requirements in 6.7.2.6 through 6.7.2.8 of this regulation; and
6.4.3.1.3.4 Satisfy the reporting requirements in 6.8.4 and 6.8.6 of this regulation.
6.4.3.1.4 The requirement to operate a composite mesh-pad system within the range of pressure drop values established in 6.4.3.1.1 through 6.4.3.1.3 of this regulation does not apply during automatic washdown cycles of the composite mesh-pad system.
6.4.3.2 Packed-bed scrubber systems
.2.8 of this regulation; and
6.4.3.1.3.4 Satisfy the reporting requirements in 6.8.4 and 6.8.6 of this regulation.
6.4.3.1.4 The requirement to operate a composite mesh-pad system within the range of pressure drop values established in 6.4.3.1.1 through 6.4.3.1.3 of this regulation does not apply during automatic washdown cycles of the composite mesh-pad system.
6.4.3.2 Packed-bed scrubber systems.
6.4.3.2.1 During the initial performance test, the owner or operator of an affected source, or group of affected sources under common control, complying with the emission limitations in 6.3 of this regulation through the use of a packed-bed scrubber system shall determine the outlet chromium concentration using the procedures in 6.5.3 of this regulation, and shall establish as site-specific operating parameters the pressure drop across the system and the velocity pressure at the common inlet of the control device, setting the value that corresponds to compliance with the applicable emission limitation using the procedures in 6.5.4.4 and 6.5.4.5 of this regulation. An owner or operator may conduct multiple performance tests to establish a range of compliant operating parameter values. Alternatively, the owner or operator may set as the compliant value the average pressure drop and inlet velocity pressure measured over the three test runs of one performance test, and accept ±1 inch of water column from the pressure drop value and ±10% from the velocity pressure value as the compliant range.
6.4.3.2.2 On and after the date on which the initial performance test is required to be completed under 3.7 of this regulation, the owner or operator of an affected source, or group of affected sources under common control, shall monitor and record the velocity pressure at the inlet to the packed-bed scrubber system and the pressure drop across the scrubber system once each day that any affected source is operating
fter the date on which the initial performance test is required to be completed under 3.7 of this regulation, the owner or operator of an affected source, or group of affected sources under common control, shall monitor and record the velocity pressure at the inlet to the packed-bed scrubber system and the pressure drop across the scrubber system once each day that any affected source is operating. To be in compliance with the standards, the scrubber system shall be operated within ±10% of the velocity pressure value established during the initial performance test and within ±1 inch of water column of the pressure drop value established during the initial performance test or within the range of compliant operating parameter values established during multiple performance tests.
6.4.3.3 Packed-bed scrubber/composite mesh-pad system. The owner or operator of an affected source, or group of affected sources under common control, that uses a packed-bed scrubber in conjunction with a composite mesh-pad system to meet the emission limitations in 6.3 of this regulation shall comply with the monitoring requirements for composite mesh-pad systems as identified in 6.4.3.1 of this regulation.
6.4.3.4 Fiber-bed mist eliminator.
6.4.3.4.1 During the initial performance test, the owner or operator of an affected source, or group of affected sources under common control, complying with the emission limitations in 6.3 of this regulation through the use of a fiber-bed mist eliminator shall determine the outlet chromium concentration using the procedures in 6.5.3 of this regulation, and shall establish as a site-specific operating parameter the pressure drop across the fiber-bed mist eliminator and the pressure drop across the control device installed upstream of the fiber bed to prevent plugging, setting the value that corresponds to compliance with the applicable emission limitation using the procedures in 6.5.4.5 of this regulation
e procedures in 6.5.3 of this regulation, and shall establish as a site-specific operating parameter the pressure drop across the fiber-bed mist eliminator and the pressure drop across the control device installed upstream of the fiber bed to prevent plugging, setting the value that corresponds to compliance with the applicable emission limitation using the procedures in 6.5.4.5 of this regulation. An owner or operator may conduct multiple performance tests to establish a range of compliant pressure drop values, or may set as the compliant value the average pressure drop measured over the three test runs of one performance test and accept ±1 inch of water column from this value as the compliant range.
6.4.3.4.2 On and after the date on which the initial performance test is required to be completed under 3.7 of this regulation, the owner or operator of an affected source, or group of affected sources under common control, shall monitor and record the pressure drop across the fiber-bed mist eliminator and the control device installed upstream of the fiber bed to prevent plugging, once each day that any affected source is operating. To be in compliance with the standards, the fiber-bed mist eliminator and the upstream control device shall be operated within ±1 inch of water column of the pressure drop value established during the initial performance test or shall be operated within the range of compliant values for pressure drop established during multiple performance tests.
6.4.3.5 Wetting agent-type or combination wetting agent-type/foam blanket fume suppressants.
6.4.3.5.1 During the initial performance test, the owner or operator of an affected source complying with the emission limitations in 6.3 of this regulation through the use of a wetting agent in the electroplating or anodizing bath shall determine the outlet chromium concentration using the procedures in 6.5.3 of this regulation
ype or combination wetting agent-type/foam blanket fume suppressants.
6.4.3.5.1 During the initial performance test, the owner or operator of an affected source complying with the emission limitations in 6.3 of this regulation through the use of a wetting agent in the electroplating or anodizing bath shall determine the outlet chromium concentration using the procedures in 6.5.3 of this regulation. The owner or operator shall establish as the site-specific operating parameter the surface tension of the bath using Method 306B in Appendix A of 40 CFR Part 63, setting the maximum value that corresponds to compliance with the applicable emission limitation. In lieu of establishing the maximum surface tension during the performance test, the owner or operator may accept as the maximum surface tension value the value in 6.4.3.5.1.1, 6.4.3.5.1.2, or 6.4.3.5.1.3 of this regulation, whichever is applicable. However, the owner or operator is exempt from conducting a performance test only if the criteria in 6.4.2.1 of this regulation are met.
6.4.3.5.1.1 Prior to September 19, 2014, the owner or operator of existing affected sources may accept 45 dynes/cm (3.1 x 10 -3 lbf/ft) as measured by a stalagmometer or 35 dynes/cm (2.4 x 10 -3 lbf/ft) as measured by a tensiometer as the maximum surface tension value.
6.4.3.5.1.2 On and after September 19, 2014, the owner or operator of existing affected sources may accept 40 dynes/cm (2.8 x 10 -3 lbf/ft) as measured by a stalagmometer or 33 dynes/cm (2.3 x 10 -3 lbf/ft) as measured by a tensiometer as the maximum surface tension value.
6.4.3.5.1.3 The owner or operator of new or reconstructed affected sources may accept 40 dynes/ cm (2.8 x 10 -3 lbf/ft) as measured by a stalagmometer or 33 dynes/ cm (2.3 x 10 -3 lbf/ft) as measured by a tensiometer as the maximum surface tension value
0 -3 lbf/ft) as measured by a stalagmometer or 33 dynes/cm (2.3 x 10 -3 lbf/ft) as measured by a tensiometer as the maximum surface tension value.
6.4.3.5.1.3 The owner or operator of new or reconstructed affected sources may accept 40 dynes/ cm (2.8 x 10 -3 lbf/ft) as measured by a stalagmometer or 33 dynes/ cm (2.3 x 10 -3 lbf/ft) as measured by a tensiometer as the maximum surface tension value.
6.4.3.5.2 On and after the date on which the initial performance test is required to be completed under 3.7 of this regulation, the owner or operator of an affected source shall monitor the surface tension of the electroplating or anodizing bath. Operation of the affected source at a surface tension greater than the value established during the performance test or greater than the applicable maximum surface tension value in 6.4.3.5.1.1, 6.4.3.5.1.2, or 6.4.3.5.1.3 of this regulation, if the owner or operator is accepting this value in accordance with 6.4.3.5.1 of this regulation, shall constitute noncompliance with the standards. The surface tension shall be monitored according to the following schedule:
6.4.3.5.2.1 The surface tension shall be measured once every four hours during operation of the tank with a stalagmometer or a tensiometer as specified in Method 306B in Appendix A of 40 CFR Part 63.
6.4.3.5.2.2 The time between monitoring can be increased if there have been no exceedances. The surface tension shall be measured once every four hours of tank operation for the first 40 hours of tank operation after the compliance date. Once there are no exceedances during 40 hours of tank operation, surface tension measurement may be conducted once every eight hours of tank operation. Once there are no exceedances during 40 hours of tank operation, surface tension measurement may be conducted once every 40 hours of tank operation on an ongoing basis, until an exceedance occurs. The minimum frequency of monitoring allowed by 6.0 of this regulation is once every 40 hours of tank operation
tion, surface tension measurement may be conducted once every eight hours of tank operation. Once there are no exceedances during 40 hours of tank operation, surface tension measurement may be conducted once every 40 hours of tank operation on an ongoing basis, until an exceedance occurs. The minimum frequency of monitoring allowed by 6.0 of this regulation is once every 40 hours of tank operation.
6.4.3.5.2.3 Once an exceedance occurs as indicated through surface tension monitoring, the original monitoring schedule of once every four hours shall be resumed. A subsequent decrease in frequency shall follow the schedule laid out in 6.4.3.5.2.2 of this regulation. For example, if an owner or operator had been monitoring an affected source once every 40 hours and an exceedance occurs, subsequent monitoring would take place once every four hours of tank operation. Once an exceedance does not occur for 40 hours of tank operation, monitoring can occur once every eight hours of tank operation. Once an exceedance does not occur for 40 hours of tank operation on this schedule, monitoring can occur once every 40 hours of tank operation.
6.4.3.5.3 Once a bath solution is drained from the affected tank and a new solution added, the original monitoring schedule of once every four hours shall be resumed, with a decrease in monitoring frequency allowed following the procedures in 6.4.3.5.2.2 and 6.4.3.5.2.3 of this regulation.
6.4.3.6 Foam blanket-type fume suppressants.
6.4.3.6.1 During the initial performance test, the owner or operator of an affected source complying with the emission limitations in 6.3 of this regulation through the use of a foam blanket in the electroplating or anodizing bath shall determine the outlet chromium concentration using the procedures in 6.5.3 of this regulation and shall establish as the site-specific operating parameter the thickness of the foam blanket, setting the minimum thickness that corresponds to compliance with the applicable emission limitation
ions in 6.3 of this regulation through the use of a foam blanket in the electroplating or anodizing bath shall determine the outlet chromium concentration using the procedures in 6.5.3 of this regulation and shall establish as the site-specific operating parameter the thickness of the foam blanket, setting the minimum thickness that corresponds to compliance with the applicable emission limitation. In lieu of establishing the minimum foam blanket thickness during the performance test, the owner or operator may accept 2.54 centimeters (one inch) as the minimum foam blanket thickness that corresponds to compliance with the applicable emission limitation. All foam blanket measurements shall be taken in close proximity to the part or cathode area in the plating tank or tanks.
6.4.3.6.2 On and after the date on which the initial performance test is required to be completed under 3.7 of this regulation, the owner or operator of an affected source shall monitor the foam blanket thickness of the electroplating or anodizing bath. Operation of the affected source at a foam blanket thickness less than the value established during the performance test or less than 2.54 cm (one inch) if the owner or operator is using this value in accordance with 6.4.3.6.1 of this regulation, shall constitute noncompliance with the standards. The foam blanket thickness shall be measured according to the following schedule:
6.4.3.6.2.1 The foam blanket thickness shall be measured once every hour of tank operation.
6.4.3.6.2.2 The time between monitoring can be increased if there have been no exceedances. The foam blanket thickness shall be measured once every hour of tank operation for the first 40 hours of tank operation after the compliance date. Once there are no exceedances for 40 hours of tank operation, foam blanket thickness measurement may be conducted once every four hours of tank operation
ration.
6.4.3.6.2.2 The time between monitoring can be increased if there have been no exceedances. The foam blanket thickness shall be measured once every hour of tank operation for the first 40 hours of tank operation after the compliance date. Once there are no exceedances for 40 hours of tank operation, foam blanket thickness measurement may be conducted once every four hours of tank operation. Once there are no exceedances during 40 hours of tank operation, foam blanket thickness measurement may be conducted once every four hours of tank operation on an ongoing basis, until an exceedance occurs. The minimum frequency of monitoring allowed by 6.0 of this regulation is once per four hours of tank operation.
6.4.3.6.2.3 Once an exceedance occurs as indicated through foam blanket thickness monitoring, the original monitoring schedule of once every hour shall be resumed. A subsequent decrease in frequency shall follow the schedule laid out in 6.4.3.6.2.2 of this regulation. For example, if an owner or operator had been monitoring an affected source once every four hours and an exceedance occurs, subsequent monitoring would take place once every hour of tank operation. Once an exceedance does not occur for 40 hours of tank operation, monitoring can occur once every four hours of tank operation. Once an exceedance does not occur for 40 hours of tank operation on this schedule, monitoring can occur once every four hours of tank operation.
6.4.3.6.3 Once a bath solution is drained from the affected tank and a new solution added, the original monitoring schedule of once every hour shall be resumed, with a decrease in monitoring frequency allowed following the procedures in 6.4.3.6.2.2 and 6.4.3.6.2.3 of this regulation.
6.4.3.7 Fume suppressant/add-on control device
edule, monitoring can occur once every four hours of tank operation.
6.4.3.6.3 Once a bath solution is drained from the affected tank and a new solution added, the original monitoring schedule of once every hour shall be resumed, with a decrease in monitoring frequency allowed following the procedures in 6.4.3.6.2.2 and 6.4.3.6.2.3 of this regulation.
6.4.3.7 Fume suppressant/add-on control device.
6.4.3.7.1 If the owner or operator of an affected source uses both a fume suppressant and add-on control device and both are needed to comply with the applicable emission limitation, the applicable monitoring requirements as identified 6.4.3.1 through 6.4.3.6 of this regulation and the operation and maintenance procedures of Table 6-1 of this regulation apply for each of the control techniques used.
6.4.3.7.2 If the owner or operator of an affected source uses both a fume suppressant and add-on control device, but only one of these techniques is needed to comply with the applicable emission limitation, the applicable monitoring requirements as identified in 6.4.3.1 through 6.4.3.6 of this regulation and the operation and maintenance procedures of Table 6-1 of this regulation apply only for the control technique used to achieve compliance.
6.4.3.8 Use of an alternative monitoring method.
6.4.3.8.1 Requests and approvals of alternative monitoring methods shall be considered in accordance with 3.8.6.1, 3.8.6.3, 3.8.6.4, and 3.8.6.5 of this regulation
in 6.4.3.1 through 6.4.3.6 of this regulation and the operation and maintenance procedures of Table 6-1 of this regulation apply only for the control technique used to achieve compliance.
6.4.3.8 Use of an alternative monitoring method.
6.4.3.8.1 Requests and approvals of alternative monitoring methods shall be considered in accordance with 3.8.6.1, 3.8.6.3, 3.8.6.4, and 3.8.6.5 of this regulation.
6.4.3.8.2 After receipt and consideration of an application for an alternative monitoring method, the Administrator may approve alternatives to any monitoring methods or procedures of 6.0 of this regulation including, but not limited to, the following:
6.4.3.8.2.1 Alternative monitoring requirements when installation or use of monitoring devices specified in 6.0 of this regulation would not provide accurate measurements due to interferences caused by substances within the effluent gases or
6.4.3.8.2.2 Alternative locations for installing monitoring devices when the owner or operator can demonstrate that installation at alternate locations will enable accurate and representative measurements.
6.4.4 An owner or operator who uses an air pollution control device not listed in 6.4 of this regulation shall submit to the Administrator (with copy to the Department) a description of the device, test results collected in accordance with 6.5.3 of this regulation verifying the performance of the device for reducing chromium emissions to the atmosphere to the level required by 6.0 of this regulation, a copy of the operation and maintenance plan referenced in 6.3.6 of this regulation including operation and maintenance procedures and housekeeping procedures, and appropriate operating parameters that will be monitored to establish continuous compliance with the standards. The monitoring plan submitted identifying the continuous compliance monitoring is subject to the Administrator’s approval.
6.5 Performance test requirements and test methods.
6.5.1 Performance test requirements
ncluding operation and maintenance procedures and housekeeping procedures, and appropriate operating parameters that will be monitored to establish continuous compliance with the standards. The monitoring plan submitted identifying the continuous compliance monitoring is subject to the Administrator’s approval.
6.5 Performance test requirements and test methods.
6.5.1 Performance test requirements. Performance tests shall be conducted using the test methods and procedures in 6.5 and 3.7 of this regulation. Performance tests shall be conducted under such conditions as the Department specifies to the owner or operator based on representative performance of the affected source for the period being tested. Upon request, the owner or operator shall make available to the Department such records as may be necessary to determine the conditions of performance tests. Performance test results shall be documented in complete test reports that contain the information required in 6.5.1.1 through 6.5.1.9 of this regulation. The test plan to be followed shall be made available to the Department prior to the testing, if requested.
6.5.1.1 A brief process description;
6.5.1.2 Sampling location description or descriptions;
6.5.1.3 A description of sampling and analytical procedures and any modifications to standard procedures;
6.5.1.4 Test results;
6.5.1.5 Quality assurance procedures and results;
6.5.1.6 Records of operating conditions during the test, preparation of standards, and calibration procedures;
6.5.1.7 Raw data sheets for field sampling and field and laboratory analyses;
6.5.1.8 Documentation of calculations; and
6.5.1.9 Any othe

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Source: Frix Law Library, https://www.frixlaw.com/law-library/statutes/STATE_DE_ADC_T7_60. Check the current official text before relying on it. Not legal advice.