SCAQMD RULE 1169 HEXAVALENT CHROMIUM - CHROME PLATING & CAA
LAST REVISED 12/07/90

(Adopted June 3, 1988)(Amended September 8, 1989)

(Amended December 7, 1990)

RULE 1169. HEXAVALENT CHROMIUM - CHROME PLATING AND CHROMIC ACID ANODIZING

(a) Definitions

For the purpose of this rule the following definitions shall apply:

  1. AMPERE-HOURS is the integral of electrical current applied to a plating tank (amperes) over a period of time (hours).
  2. ANTI-MIST ADDITIVE is a chemical which reduces the chromium emission rate from the tank when added to and maintained in the plating tank.
  3. CHROME means metallic chrome.
  4. CHROME PLATING means either hard or decorative chrome plating.
  5. CHROMIC ACID is an aqueous solution of chromium trioxide (CrO3) or a commercial solution containing chromic acid, dichromic acid (H2Cr2O7), or trichromic acid (H2Cr3O10).
  6. CHROMIC ACID ANODIZING is the electrolytic process by which a metal surface is converted to an oxide surface coating in a solution containing chromic acid.
  7. CHROMIUM means a hexavalent chromium.
  8. CONTROL EQUIPMENT is any device which reduces chromium emissions from the emissions collection system.
  9. DECORATIVE CHROME PLATING is the process by which chromium is electrodeposited from a solution containing compounds of chromium onto an object resulting in a chrome layer 1 micron (0.04 mil) thick or less.
  10. EMISSION FACTOR is the mass of chromium emissions to the atmosphere determined by a test method conducted on the plating tank(s) in accordance with ARB Test Method 425, SCAQMD Test Method 205.1, or other equivalent test method approved by the Executive Officer (Office of Operations), divided by the ampere-hours consumed by the plating tank(s) served by the emissions collection system, expressed as the mass of chromium emitted per ampere-hour of electrical current consumed.
  11. EMISSIONS COLLECTION SYSTEM is any device or apparatus designed and operated for the maximum collection of chromium emissions from chrome plating and/or chromic acid anodizing tank(s) as approved by the Executive Officer (Office of Operations).
  12. FACILITY means a business or businesses engaged in chrome plating or chromic acid anodizing which are owned or operated by the same person or persons and are located on the same or contiguous parcels.
  13. FACILITYWIDE EMISSIONS FROM CHROME PLATING OR CHROMIC ACID ANODIZING is the total emissions to the atmosphere from all chrome plating or chromic acid anodizing at the facility during a calendar year. Emissions shall be calculated as the sum of emissions from all tanks at the facility. The emissions shall be calculated by multiplying the applicable emission factor for each tank by the ampere-hours consumed by this tank during the year.
  14. HARD CHROME PLATING is the process by which chromium is electrodeposited from a solution containing compounds of chromium onto an object resulting in a chrome layer thicker than 1 micron (0.04 mil).
  15. PLATING TANK means any container used to hold a chromium or chromic acid solution in which chrome plating or chromic acid anodizing occurs.
  16. UNCONTROLLED CHROMIUM EMISSIONS FROM THE CHROME PLATING AND/OR CHROMIC ACID ANODIZING FACILITY is the chromium emissions from the emissions collection systems at the facility calculated as if no control measure is in use. For the purpose of determining compliance with this rule, the uncontrolled chromium emissions shall be calculated using an emission factor based on tests conducted in accordance with ARB Test Method 425, SCAQMD Test Method 205.1 or other equivalent test methods approved by the Executive Officer (Office of Operations), or 14.0 milligram (mg) of chromium per ampere-hour, whichever is less.

(b) Requirements For Decorative Chrome, Hard Chrome Plating and/or Chromic Acid Anodizing Facilities

  1. A person shall not operate a chrome plating or a chromic acid anodizing tank unless one of the following conditions is met:
  2. (A) The chromium emissions from the plating tank must be reduced by 95 percent or more using any of the following control measures:

      (i) An anti-mist additive, or other method, is used as approved by the Executive Officer (Office of Operations); or

      (ii) Control equipment is installed with at least 95 percent efficiency and with an emission collection system meeting design criteria approved by the Executive Officer (Office of Operations).

    (B) The chromium emissions from the emissions collection system serving the plating tank must be reduced to less than 0.05 milligram (mg) of chromium per ampere-hour for decorative plating and less than 0.15 milligram (mg) of chromium per ampere-hour of electrical charge applied to the plating tank for hard chrome plating and/or chromic acid anodizing.

  3. A person shall not operate a chrome plating tank or a chromic acid anodizing tank at a facility where the facilitywide chromium emissions from chrome plating or chromic acid anodizing are greater than 2 pounds per year, unless one of the following conditions is met:
  4. (A) The chromium emissions from the plating tank must be reduced by 99 percent or more using any of the following control measures:

      (i) An anti-mist additive, or other method, is used as approved by the Executive Officer (Office of Operations); or

      (ii) Control equipment is installed with at least 99 percent efficiency and with an emission collection system meeting design criteria approved by the Executive Officer (Office of Operations).

    (B) The chromium emissions from the emissions collection system serving the plating tank must be reduced to less than 0.03 milligram (mg) of chromium per ampere-hour of electrical charge applied to the plating tank.

  5. A person shall not operate a chrome plating tank or a chromic acid anodizing tank at a facility where the facilitywide chromium emissions from chrome plating or chromic acid anodizing are ten (10) pounds per year or greater, unless one of the following conditions is met:
  6. (A) The chromium emissions from the plating tank must be reduced by 99.8 percent or more using any of the following control measures:

      (i) An anti-mist additive, or other method, is used as approved by the Executive Officer (Office of Operations); or

      (ii) Control equipment is installed with at least 99.8 percent efficiency and with an emission collection system meeting design criteria approved by the Executive Officer (Office of Operations).

    (B) The chromium emissions from the emissions collection system serving the plating tank must be reduced to less than 0.006 milligram (mg) of chromium per ampere-hour of electrical charge applied to the plating tank.

(c) Recordkeeping

A person shall not operate a decorative chrome plating tank, a hard chrome plating tank and/or a chromic acid anodizing tank unless the following conditions are met:

  1. On and after the date of final compliance, a continuous record shall be maintained of anti-mist additive concentrations or any other measurements recommended by manufacturer's specification or required by the Executive Officer (Office of Operations);
  2. On or before October 1, 1989, the operator must install a non-resettable, totalizing ampere-hour meter on each tank and maintain a daily log of ampere-hours applied to each tank.
  3. Copies of all records including all pertinent information in relation to the operation shall be kept for not less than two years and shall be made available to the District, Office of Operations upon request.

(d) Compliance Schedule

  1. For decorative chrome plating facilities:
  2. On or before November 1, 1988, the owner or operator of decorative chrome plating tanks shall comply with the provisions of subparagraph (b)(1).

  3. For hard chrome plating and/or chromic acid anodizing facilities:
  4. The owner or operator of a hard chrome plating and/or chromic acid anodizing facility shall meet the following compliance schedule:

    (A) On or before October 1, 1989, submit to the District, Office of Operations proof of compliance, a control plan, and/or an application(s) for permit to construct the equipment necessary to meet the requirement of subparagraph (b)(1); and.

    (B) On or before November 1, 1989, be in full compliance with the requirements of subparagraph (b)(1).

  5. For decorative chrome, hard chrome plating and/or chromic acid anodizing facilities:
  6. (A) The owner or operator of all chrome plating and/or chromic acid anodizing facility subject to subparagraph (b)(2) shall in addition meet the following compliance schedule:

      (i) On or before November 1, 1989, submit to the District, Office of Operations proof of compliance, a control plan, and/or an application(s) for permit to construct the equipment necessary to meet the requirements of subparagraph (b)(2); and

      (ii) On or before May 1, 1990, be in full compliance with the requirements of subparagraph (b)(2).

    (B) The owner or operator of a chrome plating and/or chromic acid anodizing facility having any equipment subject to subparagraph (b)(3) shall, in addition, meet the following compliance schedule:

      (i) On or before November 1, 1990, submit to the District, Office of Operations proof of compliance, control plan, and/or application for permit to construct the equipment necessary to meet the requirements of subparagraph (b)(3); and

      (ii) On or before May 1, 1992, be in full compliance with the requirements of subparagraph (b)(3).