Metal Melting

Metal melting operations melt pure metals or alloys and cast to create shape. These facilities may use small crucibles and furnaces to melt ingots prior to casting into dies and molds for small pars, tools, and plaques.  Particulates, alloy additives, trace metallic toxic air contaminants, and flux from the melting pot and the casting area are emitted into the air.  The following information will assist in the completion and submittal of an application for each metal melting operation. Each section of the page contains important information needed to process an application. 

The District collects information about equipment and processes that are required to have a permit by asking for completion of application forms. These forms tell us about your operation and allow us to permit your process. It is very important that these forms are filled out completely and accurately. Errors and missing information may lead to delayed processing time and additional charges if revisions are required. Please carefully review and complete the forms. You may contact the District with any questions.

General Application: Word PDF

Metal Melting Word PDF

Control Device (if applicable) Word PDF

Toxics Form: Word PDF

The general and equipment specific application forms must be submitted with each application packet.

The correct fee, as shown in the table(s) below, must be submitted with your application in order for it to be accepted. Please note that the fees listed in these tables are estimated and the final fee may be more or less than this amount based on time and materials spent processing the application. The District maintains work records for this purpose.

Fee Table

Furnace

If you are unsure of the correct fee contact the District (see Assistance tab) to obtain an application fee estimate to confirm the fees required for application submittal. Please note that an additional fee may also apply depending on the method of payment. A breakdown of how the application fee(s) are determined can be seen here. Additional information can be found in District Rule 40.

How to Pay

These fees may be paid by check payable to "Air Pollution Control District" or by credit card (Visa, MasterCard, Discover, and American Express).

If you choose to email or fax your application and intend on paying with a credit card, ensure that you have obtained your fee estimate and have it in hand, and then after submitting the application, you must contact the District over the phone at (858)586-2600 to provide payment information.

Please note that credit card payments are assessed a transaction fee of 2.19% that is charged by the credit card provider.

Citizen Access
Select equipment type applications can now be submitted online.

Fax: (858) 586-2601

SDAPCD
Permit Processing
10124 Old Grove Rd
San Diego, CA 92131-1649

The District will act on complete applications as soon as possible but at most within 180 days. The engineer assigned to your application will review it and contact you within 30 days of receipt to confirm that it is complete or request additional information. Typically permits are issued in about 60 days. More complex processes will take longer. Common reasons that applications may take longer than 60 days to evaluate include: the project is a complex project specifically at a major source, if the project requires a mandatory public notice period due to being installed within 1000 feet of a school or triggering the requirement for a air quality impact analysis (AQIA), if they do not initially pass a health risk assessment (HRA) or AQIA, if BACT is not proposed or complete BACT analysis is not submitted or for major sources if actual emission data is not included.

Ensuring your application is complete is the best way to reduce processing time. Complete emissions data is the most important factor in minimizing application processing time and iterative information requests. If you have any questions about what information is required, please contact the District using the information on the Assistance tab.

Sign up for Citizen Access to get up to date information on the status of your application.

Learn more about the permitting process and what to expect.

Best Available Control Technology

If a piece of equipment or a process emits more than 10 pounds per day of particulate matter (PM10), oxides of nitrogen (NOx), volatile organic compounds (VOC) or oxides of sulfur (SOx), the application must include a best available control technology (BACT) analysis. The District has a BACT guide to assist with the analysis. If you have questions or need assistance reference the contact information at the bottom of this page. Please review District Rules 20.1 and 20.2.

Toxics

District Rule 1200 applies to any new, relocated, or modified emission unit which may increase emissions of one or more toxic air contaminant(s). The proposed project must comply with Rule 1200. Proposed equipment may require toxics best available control technology (TBACT) depending on the project. Please review District Rule 1200 for further details.

Trade Secret

District rules address how information that is submitted to the District is managed. District Regulation IX contains District Rules 176 and 177. Please refer directly to these rules when submitting trade secret information. However, be aware that you will need to submit:

  1. You must indicate on the general application form that your submittal includes trade secret information to ensure that it is not inadvertently made publicly available.
  2. A letter disclosing the proprietary information. Ideally, this information should be separated from your application and clearly identifiable. This can be submitted electronically, and can be a separate submittal from the main application package.
  3. A letter for the  public record explaining why the information needs to be held as trade secret or is otherwise exempt from disclosure.

Applications submitted with incomplete material composition data due to failure to include proprietary information can significantly delay permit applications. In an effort to expedite the permit application process it is recommended that you contact the manufacturer or vendor of any proprietary materials that are used in the process and prepare the required letters as part of your application submittal.

AB3205

In 1989, the California state legislature passed a law, AB 3205, designed to protect schoolchildren from hazardous air contaminants. The law, as currently written, requires the District to notify parents of schoolchildren, neighboring businesses and residents of all new or modified equipment that emits any hazardous air contaminant into the air which will be installed within 1,000 feet of a school site. The law also requires the District to consider any comments before authorizing construction. Please review your proposed location. If a school property boundary is located within 1,000 feet of the proposed emissions point, the AB3205 process will be initiated. This process requires a 30 day public comment period and the overall process will delay projects by at least six weeks.

NESHAP/NSPS/ATCM

Depending on the type of source and volume of emissions, multiple subparts from NESHAP and NSPS can be applicable for this type of operation. District Engineering will evaluate this operation for applicability to the requirements to the NSPS and NESHAP.

This type of operation may be subject to 17 CCR 93107 ATCM for Emissions of Toxic Metals from Non-Ferrous Metal Melting.

District Rules

Several District rules may apply to your equipment. There are no equipment specific rules for this equipment. A complete listing of the District's rules can be found here.

Calculation Procedures and Additional Resources

Equipment Calculation Procedures - This page contains procedures to be used for calculating emissions from this equipment that should be submitted with each application.

Use of these calculation procedures will aid in minimizing application review time and costs.  The correct emission factors should be selected from the list based on equipment. If available, manufacturer provided equipment specific emission data or source test results should be utilized before using default emission factors. Sources of all emission data used must be included as attachments to the application.

AP-42 - An alternative compilation of emission factors and calculation procedures prepared by the EPA that may be utilized by the District in some situations for some equipment types.

Call Duty Engineer
(858) 586-2600

District Small Business Assistance Program Coordinator
(858) 586-2656