# Presentation: 710533

## NATIONAL EMISSION STANDARDS FORCHROMIUM EMISSIONS FROM HARD & DECORATIVE CHROMIUM ELECTROPLATING & CHROMIUM ANODIZING TANKS

## CURRENT RULE BACKGROUND

- Promulgated – January 25, 1995[60 FR 4963]
- Established Standards
- For small and large facilities which operate hard chromium electroplating tanks.
- For new and existing decorative chromium electroplating tanks.
- For new and existing chromium anodizing tanks.

## PROPOSED RULE AMENDMENTSCHROME NESHAP40 PART 63 SUBPART N

## HARD CHROMIUM PROPOSED RULE AMENDMENTS

- The Hard Chrome Proposed Amendments Apply To The Following Facilities Criteria:
- Operates hard chrome electroplating (ep) tankand uses fume suppressants for control.
- Operates an enclosed hard chrome (ep) tank.
-  Replacement of chromium (ep) tank that may require reconstruction review.
- Operates composite mesh pad control system

## DECORATIVE & ANODIZING CHROMIUM PROPOSED RULE AMENDMENTS

- These Amendments Apply To The Following Facilities Criteria:
- Replacement of an anodizing tank that may require reconstruction review.
- Operates composite mesh pad control system for emissions.
- Operates decorative or anodizing tank that uses fume suppressants for emission control and uses a surface tension tensiometer.

## PROPOSED AMENDMENTS SUMMARY

- Chrome Electroplating NESHAP 40 CFR Part 63 Subpart N
- Section 63.341 Definitions & Nomenclature
- Section 63.342 Standards (b) (c)
- Section 63.343 Compliance Provisions
- Section 63.344 Performance Test Requirements and Test Methods
- Section 63.347 Reporting Requirements

## PROPOSED AMENDMENTS SECTION 63.341

- Definitions & Nomenclature
- Revise chrome plating & anodizing tank to include auxiliary equipment.
- Result – source not subject to new emission requirements in accord with replacement and construction retrofits.
- Result – not subject to new source emission requirements; provides for less stringent controls.

## PROPOSED AMENDMENTS SECTION 63.342

- Standards
- (b) Applicability of emission limitations.
- 	- applies for routine tank operation; including startup and shutdown.
- 	- emission limitations do not apply to malfunctions.

## PROPOSED AMENDMENTS SECTION 63.342

- Standards
- (c) (1) Standards for open surface hard chromium electroplating tanks.
- Detailed rules for controlling chromium emission discharges to the atmosphere.
- Must comply with fume suppressant maximum surface tension value.
- Must conduct surface tension measurements; see M306B and Sections 63.343 & 63.344.

## PROPOSED AMENDMENTS SECTION 63.342

- Standards
- (c)(2) Standards for enclosed hard chromium electroplating tanks.
- Detailed rules for controlling chromium emission discharges to the atmosphere.
- Must conduct surface tension measurements; see M306B and Sections 63.343 & 63.344.
- Mass emission rate must not exceed maximum allowed as determined in 63.344.

## PROPOSED AMENDMENTS SECTION 63.342

- Standards(c)(2) Standards for enclosed hard chromium electroplating tanks.
- Facility operation Options:
- Option to meet a mass emission limit (mg/hr) in lieu of current concentration standard (ug/dscm).
- Option allows source to calculate mass emission limit based on concentration standard (because of  lower exhaust rates).

## PROPOSED AMENDMENTS SECTION 63.343

- Compliance Provisions
- Initial Performance Test
- If, facility meets following criteria, Performance Test Not Required.
- Source is a hard chromium electroplating tank.
- Wetting agent is used to inhibit chrome emissions.
- Source complies with surface tension limit.
- Source performs compliance surface tension monitoring.

## PROPOSED AMENDMENTS SECTION 63.343

- Compliance Provisions
- Composite mesh pad system pressure drop.
- Facility site-specific operating parameters to be amended.
- Modifies composite mesh pad system pressure drop monitoring requirements.
- Increases current 1” pressure drop limit to 2”.
- Improves regulatory options and flexibility.

## PROPOSED AMENDMENTS SECTION 63.344

- Performance Test Requirements and Test Methods
- (f) Compliance provisions for the mass rate emission standard for enclosed hard chromium (ep) tanks.
- Identifies procedures for calculating maximum allowable mass emission rates.
- Provides guidance for alternative mass emission limit compliance.

## PROPOSED AMENDMENTS PACKAGE 

- Part 63 Proposed Amendments Status
- Proposed June 5, 2002 for comments.
- Comments were due by August 5, 2002.
-  Reopening for 60 day comment period.
- 60 day notice to be published in Federal Register November 2002.
- Proposed Amendments Posted on Web:   www.epa.gov/ttn/oarpg

## PROPOSED AMENDMENTS PACKAGE

- For Further Information:		 Mr. Phil Mulrine (919) 541-5289
-      Emission Standards Division  Mail Code (C439-02)  Research Triangle Park, NC 27711  mulrine.phil@epa.gov