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Answers to some common questions related to 3-D printing of firearms.
Answers to common questions regarding what the program is, what is seized and who to contact.
  1. R - Interview Questions - Dear readers, these R Interview Questions have been designed specially to get you acquainted with the nature of questions you may encounter during your intervie.
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Questions about bump-stock-style devices, the final rule clarifying that bump stocks fall under the definition of 'machinegun' under federal law, and how to destroy them or abandon them at local ATF offices.
Answers to common questions regarding what equitable sharing is.
Answers to common questions regarding contesting seizures, filing claims and retrieving seized property.

R Quiz Questions. R Technology is an open source programming language. One of the most important things of R is that it produces the best publication quality post. This is because R is available as Free Software under the terms of the Free Software Foundation’s GNU. R is a very important topic because R is trending too much nowadays.

Answers to common questions about the Annual Firearms Manufacturing and Export Report.
Answers to questions about marking variances for destructive device munitions manufactured as part of a valid United States Government (USG) contract.

At&t Questions

Answers to frequently asked questions about the Bomb Arson Tracking System (BATS).

Answers to common questions about alcohol and tobacco diversion, which is the trafficking of alcohol and tobacco products in avoidance of Federal, State or foreign taxes or in violation of Federal, State or foreign law.

Answers to some common questions specific to applying for a Federal Explosives License (FEL).
Answers to some common questions about requirements for Form 4473 including where to order, how to download and proper means of identification for purchasing a firearm.
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This section deals with auctions: estate-type auctions and consignment auctions and the auctioneers.
Answers to some common questions for those who may need more information on the access requirements for BATS.
Answers to some common questions for who to contact for BATS support.
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These questions pertain to individuals who wish to collect firearms. This includes curio and relic firearms.
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Answers to some common questions about storage and shipping requirements, manufacturing, and commercial use of fireworks.
Answers to some common questions about relief from firearms disabilities, the Gun Control Act (GCA) and regulation of firearms and ammunition.

These questions are intended to help you gain a better understanding of explosives-related issues. You can also find the latest federal explosives regulations in our Rules and Regulations section.

Answers to some common questions on the definitions of a gunsmith, licensing and recordkeeping requirements.
Answers to some common questions about importing into or exporting from the United States including firearms.

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Answers to some common questions about importing or exporting firearms into/from the United States if you are not a federal firearms licensee.

Answers to some common questions about applying for the Industry Operations Investigator (IOI) position.
This section is intended to provide information on who needs a Federal explosives license or permit and the steps necessary to obtain one.
Answers to some common questions about applying for, renewing, or discontinuing a Federal Firearms License (FFL).
This section pertains to questions regarding machine guns.
Answers to some common questions related to the manufacturing of firearms and ammunition.
Answers to some common questions on the use or purchase of a firearm(s) by a person convicted of a domestic violence crime.
Answers to some common questions related to what is the Nation Firearms Act (NFA) including the definition, clarification and application of the Act, as well as which form(s) to use in order to apply for a tax stamp.
Questions and answers regarding the National Instant Criminal Background Check System.
Answers to some common questions for those who may be considered a nonimmigrant alien or for federal firearms licensees conducting business with nonimmigrant alien customers.
Answers to questions about other systems and how they relate/affect the use of BATS.
These questions pertain to pawnbrokers, who deal with the sales and purchases of firearms.
Questions regarding the personal collections of firearms if you are licensee.
This section is intended to identify what are plastic explosives and how they must be handled.
Answers to some common questions specific to receivers known as 80% receivers or unfinished receivers.
Answers to common questions about firearms records/bound book entries.
Answers to some common questions about recordkeeping requirements for explosives licensees and permittees.
Answers to some common questions when applying for a Special Agent (SA) position.
Questions and answers regarding the storage requirements of explosives and explosive materials.
Answers to frequently asked questions in regards to theft and loss of firearms in transit.
The PACT Act law went into effect on June 29, 2010. The PACT Act features several major components; it regulates the mailing of cigarettes and smokeless tobacco products to consumers through the U.S. Postal Service; Registration, Reporting, Delivery requirements, recordkeeping, List of Unregistered or Non-Compliant Delivery Seller’s; increases penalties to a felony up to 3 years imprisonment and gives ATF inspection authority to examine any records required to be maintained and any cigarettes or smokeless kept on the premises.
Answers to questions in regards to the U.S. Bomb Data Center.
Answers to some common questions regarding explosives licensing and exemptions for contractors who work with the U.S military.
Answers to some common questions about the buying, selling, shipping, renting or loaning of firearms to an unlicensed person.

1. What is R-22a?

R-22a is a hydrocarbon refrigerant blend with primary components including flammable substances such as propane and butane. In some cases, it may also contain small amounts of other hydrocarbons or a pine-scented odorant. This refrigerant is a highly flammable, colorless gas that is heavier than air.

“R-22a” has been sold under the names Blue Sky 22a, Coolant Express 22a, DURACOOL-22a, EC-22, Ecofreeze EF-22a, Enviro-safe 22a, ES-22a, Frost 22a, Maxi-Fridge, MX-22a, Oz-Chill 22a, Priority Cool, and RED TEK 22a

2. What are the potential safety risks of R-22a?

Because R-22a is flammable, it can burn or explode if there is enough product concentrated in one space and the refrigerant comes in contact with an ignition source.

3. R-22 and EPA’s Significant New Alternatives Policy (SNAP) Program

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R-22 (also known as HCFC-22) is an ozone-depleting refrigerant which has been widely used in home air conditioning systems and its supply is now being phased out in response to the Montreal Protocol. EPA reviews health, safety, and environmental impacts of refrigerants through its Significant New Alternatives Policy (SNAP) program, which evaluates and regulates substitutes for the ozone-depleting chemicals that are being phased out under the stratospheric ozone protection provisions of the Clean Air Act (CAA). In Section 612(c) of the CAA, the Agency is authorized to identify and publish lists of acceptable and unacceptable substitutes.

22 and EPA’s Significant New Alternatives Policy (SNAP) Program

R-22 is an ozone-depleting refrigerant which has been widely used in home air conditioning systems and its supply is now being phased out in response to the Montreal Protocol. EPA reviews health, safety, and environmental impacts of refrigerants through its Significant New Alternatives Policy (SNAP) program, which evaluates and regulates substitutes for the ozone-depleting chemicals that are being phased out under the stratospheric ozone protection provisions of the Clean Air Act (CAA). In Section 612(c) of the CAA, the Agency is authorized to identify and publish lists of acceptable and unacceptable substitutes.

4. Is it legal to use R-22a as a refrigerant in air-conditioning equipment designed for use with HCFC-22?

No. EPA’s SNAP Rule 21 listed as unacceptable (prohibited) refrigerant products sold as 22a and all refrigerants identified as flammability Class 3 in ANSI/ASHRAE Standard 34–2013 for retrofitting residential and light commercial unitary split AC and heat pumps. These are the units on the side of a house typically referred to as “central air conditioning.”

For more information, see SNAP Rule 21

5. What should I do if I suspect R-22a was used in my air conditioner?

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If you believe R-22a or another hydrocarbon refrigerant was introduced into your air conditioner, EPA recommends that you contact your local fire department for guidance. New refrigerant recovery equipment that has been designed and approved for use with flammable refrigerants is now available. You may also report a violation of EPA's regulations. EPA continues to investigate instances where propane-based refrigerants have been marketed and sold as a substitute for R-22 and take enforcement actions where appropriate.

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6. What actions has EPA taken against the illegal use of R-22a?

EPA cannot comment on any specific enforcement actions that it may be undertaking or that are in the early stages of investigation. However, EPA has settled with companies over allegations of illegal activity regarding the sale of R-22a as a refrigerant and will continue to take enforcement actions where appropriate. Some examples of past enforcement actions include:

  • EnviroSafe (2015)
    In a settlement with EPA, Enviro-Safe Refrigerants, Inc., of Pekin, Illinois, agreed to pay a $300,000 civil penalty and cease marketing and sale of unapproved flammable hydrocarbon refrigerants as substitutes for ozone-depleting substances. Enviro-Safe allegedly violated Clean Air Act requirements through the marketing and sale of three flammable hydrocarbon refrigerant products, HC-12a, HC-22a and HC-502a, as substitutes for ozone-depleting substances without providing the requisite information to EPA for review and approval.

  • Northcutt (2016)
    In a settlement with EPA, Northcutt, Inc., of Wichita, Kansas, agreed to discontinue domestic marketing and sales of unapproved flammable hydrocarbon refrigerants as substitutes for an ozone-depleting substitute, send a warning letter to past domestic purchasers of the substitutes, and pay a $100,000 civil penalty. Northcutt allegedly violated Clean Air Act requirements through the marketing and sale of two flammable hydrocarbon refrigerant products, ES 22a and ES 502a, as substitutes for ozone-depleting substances without providing the requisite information to EPA for review and approval.

7. Has EPA identified other flammable hydrocarbons or blends that can be safely used in air-conditioning equipment designed for use with HCFC-22?

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No. EPA has not found any flammable hydrocarbon refrigerants acceptable for use in existing air-conditioning systems designed for use with HCFC-22.

8. Which refrigerants are allowed to be used in air-conditioning systems for air-conditioning equipment designed for use with HCFC-22?

The list of acceptable refrigerants for use in home air conditioning is available at this link: Acceptable Substitutes in Household and Light Commercial Air Conditioning. You can find EPA’s lists of acceptable refrigerants for other uses here.

9. Has EPA identified other flammable hydrocarbons or blends that can be used safely as refrigerants in new refrigeration and air-conditioning equipment?

EPA has listed a number of flammable hydrocarbon refrigerants or refrigerant blends as acceptable substitutes for use in certain types of new refrigeration and air-conditioning equipment. EPA notes that the listings for household and commercial refrigerators and freezers and room air conditioning units apply only to new equipment that was specifically designed to be used with that refrigerant.

EPA expects the list of acceptable substitutes, including flammable hydrocarbon refrigerants or hydrocarbon refrigerant blends, to expand. The current lists of acceptable refrigerants for use in refrigeration and air conditioning can be found in the Refrigeration and Air Conditioning section.

These determinations were based on detailed assessments of the risks posed by each flammable refrigerant in the particular application or type of equipment to be used. In addition, in many instances EPA’s regulations adopt the results of safety reviews by industry standards-setting bodies as mandatory use conditions. Thus, EPA’s rules further reduce risk by setting requirements for the amount of refrigerant used, design and testing of equipment, and warning labels, among other things.

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