# Air General, Inc. — Hazardous Materials Safety Interpretation

- **operation:** document
- **citation:** 21-0071
- **title:** Air General, Inc. — Hazardous Materials Safety Interpretation
- **source type:** guidance
- **agency:** Pipeline and Hazardous Materials Safety Administration
- **status:** guidance
- **official:** true
- **published on:** 2022-01-28
- **effective on:** Not available
- **summary:** 21-0071 response to Air General, Inc. concerning 172.101, 172.202.
- **machine formats:** - **json:** https://regulus.evalyn.ai/document/phmsa-interpretation-21-0071.json
- **markdown:** https://regulus.evalyn.ai/document/phmsa-interpretation-21-0071.md
- **app url:** https://regulus.evalyn.ai/document/phmsa-interpretation-21-0071
- **source url:** https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/docs/standards-rulemaking/hazmat/interpretations/76166/210071.pdf
**body:**

<<<PAGE 1>>>

U.S. Department
of Transportation
Pipeline and Hazardous
Materials Safety
Administration
January 18, 2022
Charles A. White
Air General, Inc.
403 The Hill
Portsmouth, NH 03801
Reference No. 21-0071
Dear Mr. White:
This letter is in response to your July 2, 2021, letter requesting clarification of the Hazardous
Materials Regulations (HMR; 49 CFR Parts 171-180) applicable to UN specification markings
for non-bulk packagings when transported by air. In your letter, you provide a photograph of a
UN 4G fiberboard box with three UN specification markings—differing only in the marked
maximum gross mass (in kilograms). You ask how an air carrier is supposed to determine which
maximum gross mass is applicable when evaluating whether a shipment is offered within its
specified gross weight limits.
A UN specification marking indicates that a packaging is manufactured to a UN specification
standard as prescribed in part 178 of the HMR and should not be solely used to determine the
specified gross weight limits of a material; instead, information provided on the shipping paper
should aid in the determination. For transportation by aircraft, § 172.202(a)(6) requires the total
net mass of the hazardous material per package to be indicated on the shipping paper—unless a
gross mass is indicated in Columns (9A) or (9B) of the § 172.101 Hazardous Materials Table, in
which case the total gross mass per package must be indicated.
Multiple specification markings are not prohibited on a packaging, such as a UN 4G box tested
and rated for multiple gross masses (See §178.3(c)). This Office recommends that non-
applicable standard markings be covered, removed, or obliterated when practical, in order to
avoid the potential frustration of a shipment by carrier or enforcement personnel.
I hope this information is helpful. Please contact us if we can be of further assistance.
Sincerely,
1200 New Jersey Avenue, SE
Washington, DC 20590
Dirk Der Kinderen
Chief, Standards Development Branch
Standards and Rulemaking Division

<<<PAGE 2>>>

Cardez
21-0071
From: INFOCNTR (PHMSA)
To: Dodd, Alice (PHMSA)
Cc: Hazmat Interps
Subject: FW: Interpretation Ruling request letter
Date: Tuesday, July 6, 2021 3:41:37 PM
Attachments: PHMSA Ruling request letter 02072021.pdf
RE Interpretation Letters.msg
Hello Alice,
Please see the attached LOI request as well as the e-mail from Donald Burger for additional
information.
Do not hesitate to reach out should you need anything from us.
Regards,
-Breanna
From: Charles White <charles.white@airgeneral.com>
Sent: Friday, July 2, 2021 2:55 PM
To: INFOCNTR (PHMSA) <INFOCNTR.INFOCNTR@dot.gov>
Cc: Jeff Lyter <dssc@airgeneral.com>; Thomas Clark <Thomas.Clark@airgeneral.com>
Subject: Interpretation Ruling request letter
CAUTION: This email originated from outside of the Department of Transportation (DOT). Do not click on links or
open attachments unless you recognize the sender and know the content is safe.
Good Afternoon Sir(s)/Madam(s),
I have attached my formal letter of request for ruling in the matter of the use of multi-spec package
marks. Thank You in advance for your consideration in the matter.
Best regards,
Charles A White
Charles White
403 The Hill
Manager DG and Environmental Compliance
Portsmouth, NH 03801
Mobile: 704-226-2570
Email: Charles.White@airgeneral.com
Air General, Inc.
www.airgeneral.com
"Delivering Cargo Peace of Mind"

<<<PAGE 3>>>

Date 2 July 2021
PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION
U.S. DEPARTMENT OF TRANSPORTATION
1200 NEW JERSEY AVENUE, SE
WASHINGTON, DC 20590
Dear Sir(s)/Madam(s),
I am writing this letter to gain further guidance and clarification, with the use of multi-spec UN
spec packaging, for shipping of hazardous materials via aircraft, to, from, and through the
United States of America. See the photo below of the multi-spec package marking, which when
tendered to the airline, neither shipper nor freight forwarder indicated which applicable
specification gross weight limit was applicable to this shipment. Upon acceptance on behalf of
the operator, when we use our acceptance checklist and are evaluating the question as to
whether the shipment is within the specified gross weight limits, we are now questioning which
weight is applicable when all specifications have the same packing group assignment.
Address | City, St Zip Code

<<<PAGE 4>>>

"I THEE CONTAINER SHOWS SIONS OF LOSE OR DAMAGE OPEN AT ONCE.
NOTICE TO CONDONIE*
INSPECT CONTENES AND HAVE CARSIER NOTE SATEUX ON DAMAGE ON
ALL DELIVERY NICEITEN"
"CONSIGREE MIST REPORT AND REGGEST POPECTION FROM THE
"VOC ARE RESPONUBLE FOR IMMEDIATE ACTION*
ONETALAD LOSS OR DAMNCE CONSICKEE MIST FILE CLAIM FOR LOS
DELIYERINO CARRIER WITNES IN DAYS AFTER DELIVERT, ALL
OR SAMACE WITH CELIFSING CARRIE •
AV-C-16813-DG
1SAV305536
1SX25536
4S/X/15536
2

<<<PAGE 5>>>

After consulting with one of your agents, Don Burger provided an opinion that the shipper
should provide the operator with the indication of which spec marking was applicable. After
requesting this from the shipper, this has sparked a spirited debate that only regulators can offer
official ruling.
(Pictured below)
Thank you for the opportunity to share a perspective aimed at ensuring the safe transport of
hazardous goods via aircraft.
3

<<<PAGE 6>>>

SINCERELY,
CHARLES A. WHITE
Charles White
403 The Hill
Mobile: 704-226-2570
Manager DG and Environmental Compliance
Portsmouth, NH 03801
Email: Charles.White@airgeneral.com
Air General, Inc.
www.airgeneral.com
"Delivering Cargo Peace of Mind"
4

<<<PAGE 7>>>

From: Burger, Donald (PHMSA)
To: Cc: Date: Raynor, T"Mia (PHMSA); INFOCNTR (PHMSA)
Kelley, Shane (PHMSA); Nickels, Matthew (PHMSA); DerKinderen, Dirk (PHMSA); Foster, Glenn (PHMSA)
Subject: RE: Interpretation Letters
Tuesday, July 6, 2021 8:42:12 AM
Attachments: RE Multi-Spec packaging.msg
image.png
This has now gone in a full circle and come back to us (see the attached email). If Mr. White, would
like a written interpretation beyond what was provided he will need to write in and request it from
us.
Don Burger (he/him/his)
Chief, General Approvals and Permits Branch
Office of Hazardous Materials Safety
US Department of Transportation
Pipeline and Hazardous Materials Safety Administration
1200 New Jersey Ave., Washington D.C., 20590
Office: 202-366-4535 ◊ Mobile: 202-280-9908
From: Raynor, T'Mia (PHMSA) <t'mia.vines@dot.gov>
Sent: Friday, July 2, 2021 1:04 PM
To: INFOCNTR (PHMSA) <INFOCNTR.INFOCNTR@dot.gov>; Burger, Donald (PHMSA)
<donald.burger@dot.gov>
Subject: Fwd: Interpretation Letters
T’Mia Raynor
Webmaster, Office of the PHMSA CIO
US Department of Transportation
Pipeline and Hazardous Materials Safety Administration
1200 New Jersey Ave. SE, Washington, D.C., 20590
Office: 202.366.9818 ◊ Mobile: 202.580.9447
From: Charles White <charles.white@airgeneral.com>
Sent: Friday, July 2, 2021 11:59:27 AM
To: PHMSA Website Manager <PHMSAWebsiteManager@dot.gov>
Subject: Interpretation Letters
CAUTION: This email originated from outside of the Department of Transportation (DOT). Do not click on links or
open attachments unless you recognize the sender and know the content is safe.
Good morning,
I recently received an opinion from a PHMSA agent and would like to get a determination in a formal
interpretation. See a snippet of the conversation attached. Can you advise who I should address my

<<<PAGE 8>>>

letter to and whether this is the correct email address to use for the formal interpretation letter?
Best Regards,
Charles A White
Charles White
403 The Hill
Manager DG and Environmental Compliance
Portsmouth, NH 03801
Mobile: 704-226-2570
Email: Charles.White@airgeneral.com
Air General, Inc.
www.airgeneral.com
"Delivering Cargo Peace of Mind"

<<<PAGE 9>>>

From: Burger, Donald (PHMSA)
To: Hallmark, Brad (TSI)
Cc: Nicks, Michael (PHMSA); Kelley, Shane (PHMSA)
Subject: RE: Multi-Spec packaging
Date: Thursday, June 17, 2021 7:46:00 AM
Attachments: image005.jpg
image006.jpg
Brad,
Sorry to take a while to you on this question. If there are multiple marks on the packaging, then
when the package is placed into transportation, there should be an indication from the shipper to
the carrier which marking is applicable for the particular shipment.
I hope this is helpful.
Don Burger (he/him/his)
Chief, General Approvals and Permits Branch
Office of Hazardous Materials Safety
US Department of Transportation
Pipeline and Hazardous Materials Safety Administration
1200 New Jersey Ave., Washington D.C., 20590
Office: 202-366-4535 ◊ Mobile: 202-280-9908
From: Hallmark, Brad (TSI) <Brad.Hallmark@dot.gov>
Sent: Wednesday, June 16, 2021 4:28 PM
To: Kelley, Shane (PHMSA) <shane.kelley@dot.gov>; Burger, Donald (PHMSA)
<donald.burger@dot.gov>
Subject: RE: Multi-Spec packaging
Thanks Shane, Don. I appreciate any information you can share.
Brad
Bradley H. Hallmark /CHMM
Program Manager
U.S. Department of Transportation
Transportation Safety Institute
https://www.transportation.gov/transportation-safety-institute
Office: 405-954-4554
Cell: 405-795-6495
brad.hallmark@dot.gov

<<<PAGE 10>>>

From: Kelley, Shane (PHMSA)
Sent: Sunday, June 13, 2021 5:46 AM
To: Burger, Donald (PHMSA) <donald.burger@dot.gov>
Cc: Hallmark, Brad (TSI) <Brad.Hallmark@dot.gov>
Subject: Fwd: Multi-Spec packaging
Don -
Can someone on your team help?
Shane
From: Hallmark, Brad (TSI) <Brad.Hallmark@dot.gov>
Sent: Saturday, June 12, 2021 11:58:42 AM
To: Kelley, Shane (PHMSA) <shane.kelley@dot.gov>
Subject: Fwd: Multi-Spec packaging
Hi Shane,
Would you have any information on the UN packaging codes in the pictures?
Thanks,
Brad Hallmark
Get Outlook for iOS
From: Gibbs, Wallace <Wallace.Gibbs@aa.com>
Sent: Friday, June 11, 2021 1:47 PM
To: Hallmark, Brad (TSI); White, Charles
Subject: FW: Multi-Spec packaging
CAUTION: This email originated from outside of the Department of Transportation (DOT). Do not click on links or
open attachments unless you recognize the sender and know the content is safe.
Brad,

<<<PAGE 11>>>

Have you ever seen a package like this? Charles White (copied in) asked me about
this and I didn’t know how to answer it.
How do you know which Spec Code to use to validate the shipment?
Wallace Gibbs, Jr.
Wallace Gibbs
Safety Training Specialist
1 Skyview Drive
MD 8B101
Cube: 8B.1W.132D
Fort Worth, TX 76155
817-705-9004-Cell
682-278-4422-Office
682-275-9136 Fax
From: Charles White <charles.white@airgeneral.com>
Sent: Tuesday, June 8, 2021 11:05 AM
To: Gibbs, Wallace <Wallace.Gibbs@aa.com>
Subject: Multi-Spec packaging
Hi Wallace,
in TX.
Here are a couple of different packages that I have recently encountered in a couple of our stations
I have also provided test data for one of these packages.
Also, Question 9 of pg 54 in the participant manual, UN2246 cannot be shipped in single packaging
under packaging instruction 353.
Regards,
Charles A White
Charles White
403 The Hill
Manager DG and Environmental Compliance
Portsmouth, NH 03801
Mobile: 704-226-2570
Email: Charles.White@airgeneral.com
Air General, Inc.
www.airgeneral.com
"Delivering Cargo Peace of Mind"
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