BAY AREA AIR QUALITY MANAGEMENT DISTRICT

REGULATION 11 - HAZARDOUS POLLUTANTS
RULE 15 - AIRBORNE TOXIC CONTROL MEASURE FOR EMISSIONS
OF TOXIC METALS FROM NON-FERROUS METAL MELTING

INDEX

(a) DEFINITIONS

(b) REQUIREMENTS

(c) EXEMPTIONS

(d) COMPLIANCE SCHEDULE

(e) RECORDKEEPING

(f) APPLICABLE MATERIAL TESTING METHODS

(g)ALTERNATIVE COMPLIANCE OPTION

APPENDIX DIGESTION OF METAL ALUMINUM SAMPLE FORDETERMINING ARSENIC (As)



REGULATION 11

HAZARDOUS POLLUTANTS

RULE 15

AIRBORNE TOXIC CONTROL MEASURE FOR EMISSIONS OF

TOXIC METALS FROM NON-FERROUS METAL MELTING

(Adopted April 6, 1994)

Adopt new section 93107, Title 17, California Code of Regulations to read as follows:

93107 - Airborne Toxic Control Measure for Emissions of Toxic Metals from Non-Ferrous Metal Melting

(a) DEFINITIONS

For the purposes of this section, the following definitions shall apply:

  1. "Aluminum And Aluminum-based Alloys" means any metal that isat least 80% aluminum by weight.
  2. "ARB Test Method 5" means the test method specified in Title 17, California Code of Regulations, section 94105.
  3. "Clean Aluminum Scrap" means scrap that is composed solely of aluminum or aluminum alloys (including anodized aluminum) and that is free of paints, coatings, rubber, or plastics.
  4. "Copper Or Copper-based Alloy" means any metal that is more than 50 percent copper by weight, including but not limited to brass and bronze.
  5. "District" means the air quality management district or air pollution control district with jurisdiction over the facility.
  6. "Dust Forming Material" means any material containing more than 15 percent by weight of particulate matter less than 0.84 millimeter(mm) equivalent diameter as determined by ASTM C136-84a "Standard Method for Sieve Analysis of Fine and Coarse Aggregates" using a number 20 U.S. Bureau of Standards sieve with 0.84-mmsquare openings or an alternate method deemed acceptable by the district Air Pollution Control Officer or Executive Officer.
  7. "Emission Collection System" means equipment which is installed for the purpose of directing, taking in, confining, and conveying an air contaminant and which conforms to specifications for design and operation given in Industrial Ventilation, Manual of Recommended Practices, 20 th edition, 1988, published by the American Conference of Government and Industrial Hygienists, which is incorporated by reference herein.
  8. "Emission Point" means any location where molten metal is or can be exposed to air, including but not limited to furnaces, crucibles, refining kettles, ladles, tap holes, pouring spouts, and slag channels. A mold or die in which metal is cooling is not considered an emission point.
  9. "Enclosed Storage Area" means any space used to contain materials that has a wall or partition on at least three sides or three-quarters of its circumference and that screens the material stored therein to prevent emissions of the material into the air.
  10. "Facility" means any real or personal property being used for metal melting activities, which is located on one or more contiguous or adjacent parcels of property in actual contact or separated only by a public roadway or other public right-of-way, and owned or operated by the same person or persons, corporation, government agency, public district, public officer, association, joint venture, partnership, or any combination of such entities.
  11. "Fugitive Emission Control" means any equipment, activity, or process carried out to reduce emissions resulting either from the storage or handling of dust forming materials or material collected by a particulate matter control system or the removal of particulate matter from metal melting or pouring that has settled on the ground or other surfaces or that has escaped from a properly designed and operated emission collection system.
  12. "Good Operating Practices" means specific activities necessary to maintain the original collection and control efficiencies of the air pollution control equipment as designed. These activities include but are not limited to verifying operating specifications such as cleaning cycles, air flow, and velocity; and inspecting equipment such as duct work, blowers, and components of the control equipment through a general maintenance and inspection program.
  13. "Hard Lead" means any alloy containing at least 90 percent lead and more than 0.001 percent arsenic by weight or 0.001 percent cadmium by weight.
  14. "Molten Metal" means metal or metal alloy in a liquid state in which a cohesive mass ofmetal will flow under atmospheric pressure and take the shape of a container in which it is placed.
  15. "Metal Melting Furnace" means any apparatus in which metal in a container is brought to a liquid state, including but not limited to reverberatory, cupola, induction, direct arc furnaces, sweat furnaces, and refining kettles. "Metal melting furnace" does not include any apparatus in which the metal is heated but does not reach a molten state such as a sintering furnace or an annealing furnace.
  16. "New Sand" means any sand not exposed to the casting process.
  17. "Non-Ferrous Metal" means lead,copper, zinc, cadmium, arsenic, aluminum, and their alloys.
  18. "Particulate Matter" Or "PM" means any solid material, except uncombined water, which exists in a finely divided form at standard conditions of temperature and pressure (293 Kand 760 mm mercury).
  19. "Particulate Matter Control System" means any device or series of devices designed and operated in a manner intended to remove fine particulate matter (< 10 um) from an air or gas stream.
  20. "Person" shall have the same meaning as defined in Health and Safety Code Section 39047.
  21. "Process Emission Control" means any equipment installed and operated to control emissions of toxic metals from any emission point as defined in subsection (a)(8).
  22. "Pure Lead" means any alloy thatis at least 90 percent lead and contains no more that 0.001 percent cadmium by weight and 0.001 percent arsenic by weight.
  23. "Ringelmann Chart" means the Ringelmann Chart published in the United States Review of Mine Information Circular No. 1C8333,May 1967, as specified in Health and Safety Code Section 41701(b).
  24. "Scrap" means any metal or metal-containing material that has been discarded or removed from the use for which it was produced or manufactured and which is intended for reprocessing. "Scrap" does not include sprues, gates, risers, foundry returns, and similar material intended for remelting that has been generated at the facility as a consequence of casting or forming processes but has not been coated or surfaced with any material containing cadmium, arsenic, or nickel.
  25. "Solder" means any metal in which the sum of the lead and the tin is greater than 50 percent by weight and which is used for the purpose of joining two metals or of joining a metal to any other material.
  26. "Type Metal" means any lead-based alloy used for linotype machines.

(b) REQUIREMENTS

No person shall operate a non-ferrous metal melting furnace unless the facility is in compliance with all the requirements specified in subsections (b)(1) through (b)(3).

(c) EXEMPTIONS

TABLE I

METAL

EXEMPTION LIMIT
(tons per year)

Pure Lead

400

Hard Lead

200

Aluminum Scrap

125

Aluminum Ingot containing more than 0.004 percent cadmium or 0.002 percent arsenic

125

Solder

100

Zinc Scrap

30

Copper or Copper-based alloys (exceptscrap) containing more than 0.004 percent cadmium or 0.002 percent arsenic

30

Type Metal (lead for linotype machines)

25

(d) COMPLIANCE SCHEDULE

  1. Application for exemption from control requirements. Facilities seeking exemption under subsections (c)(1)or(c)(2) or (c)(3) shall apply and submit evidence of eligibility for exemption to the District no later than six months after the District adopts regulations enacting this control measure.
  2. Emission control requirements. Facilities subject to this section shall apply to the District for an authority to construct the emission collection system and the air pollution control equipment necessary to comply with subsection (b) no later than 12 months after the District adopts the regulations enacting this control measure. These facilities shall be in compliance no later than 24 months after the District adopts the regulations enacting this control measure.

(e) RECORDKEEPING

(f)APPLICABLE MATERIAL TESTING METHODS

One of the following methods or an alternate method deemed acceptable by the District Air Pollution Control Officer or Executive Officer and by the Executive Officer of the Air Resources Board shall be used. Sampling for these methods shall comply with ASTM E 88-58 (1986), "Standard Practice for Sampling Nonferrous Metals and Alloys in Cast Form for Determination of Chemical Composition."

(g) ALTERNATIVE COMPLIANCE OPTION.

A district may approve an alternative approach to compliance proposed by the facility operator, if the facility operator demonstrates to the satisfaction of the district Executive Officer or Air Pollution Control Officer that the alternative is enforceable, achieves the same or better reductions in emissions and risk and achieves these reductions within the same time period as required by this airborne toxic control measure. The alternative approach shall also be consistent with the federal Clean Air Act. The District shall revoke this approval if the facility operator fails to adequately implement the alternative approach or the alternative approach does not reduce emissions as required. The District shall notify the state board whenever it proposes to approve an alternative approach to compliance to this airborne toxic control measure.

NOTE: Authority cited: Sections 39600,39601, 39650,39655, and 39666, Health and Safety Code. Reference: Sections 39650 and 39666, Health and Safety Code.


APPENDIX A

DIGESTION OF METAL ALUMINUM SAMPLE FOR DETERMINING ARSENIC (As)

1. Introduction:

2. Reagent:

3. Procedure: