# Miller and Company — Hazardous Materials Safety Interpretation

**Citation:** 06-0187  
**Type / status:** guidance / guidance  
**Agency:** Pipeline and Hazardous Materials Safety Administration  
**Effective:** Not stated  
**Published:** 2006-08-29

06-0187 response to Miller and Company concerning 173.22.

## Document text

<<<PAGE 1>>>

J.S. Departmen
of Transportation
400 Seventh Street, S.W.
Washington, D.C. 20590
Pipeline and Hazardous
Materials Safety Administratior
AUG 29 2006
Mr. Ed Koziorowski
Ref. No.: 06-0187
Miller and Company
9700 West Higgins Road
Suite 1000
Rosemont, IL 60018
Dear Mr. Koziorowski:
This is in response to your August 8, 2006 letter requesting verification that a letter of
interpretation issued on April 14, 1997 from Delmer F. Billings to Mr. William P. Roman
Hazardous Materials Regulations (HMR; 49 CFR Parts 171-180) remains valid. You
(Ref. No.: 97-1025) regarding the classification of ferrosilicon as non-regulated under the
indicate that the ferrosilicon is manufactured by the same company, continues to contain
between 30 and 90 percent silicon, and is identical in composition to the material
identified in Mr. Roman's February 18, 1997 request for interpretation.
On May 6, 1997 we published a final rule under Docket HM-215B (62 FR 24690) which
made editorial revisions to the classification criteria for Division 4.3 materials. The final
rule removed the Division 4.3 classification testing requirements from Appendix E of the
HMR and added a reference to the UN Recommendations on the Transport of Dangerous
Goods Manual of Tests and Criteria (UN Manual) to § 173.124(c). However, the
requirements contained in the UN Manual were and continue to be virtually identical to
those contained in the HMR at the time the letter in question was drafted. Therefore,
according to the information you provided, letter of interpretation 97-1025 remains valid.
I hope this information is helpful. Please contact us if you require additional assistance.
Sincerely,
Chief, Standards Development
Office of Hazardous Materials Standards
060187
173.22

<<<PAGE 2>>>

MILLER
Supko
AND COMPANY
3173.22
Shipper's Responsibility
06-0187
Mr. Ed Mazzullo
August 8, 2006
Director D.O.T. Hazmat Standards
400 Seventh Street, S. W.
Washington, D.C. 20590
Dear Mr. Mazzullo,
On April 14, 1997, Miller and Company LLC had received an exemption
letter concerning Ferro Silicon NOT being regarded as a Hazardous Material
in Transportation (reference number 97-1025). In as much as the letter is
dated in 1997, several of our contractors are requesting an updated version.
In a recent telephone conversation with your Mr. Ben Supko, D.O.T.
Hazmat Standards, he suggested that I fax a request for this letter
reconfirming the exemption. Since the Ferro Silicon is manufactured by the
same company and has undergone no other changes in composition, we are
requesting that an updated letter be forwarded to our attention.
If you have any questions, please feel free to contact me.
Sincerely,
Ed Koziorowski (Koz)
Miller and Company
847/696-2433 (telephone)
847/696-2419 (fax)
Ekoziorowski@MillerandCo.com
CC: Ben Supko - D.O.T.

## Provenance

- Official: Yes
- Source: <https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/2006/060187.pdf>
- Source ID: `phmsa`
- SHA-256: `117442d5e7bc09fe6149730955da8777b9f517ef79addc7f8c6ee1cab8d7cd26`
- Retrieved: 2026-08-20T00:59:31.977Z
- Exported: 2026-08-22T11:39:19.230Z
- Document slug: `phmsa-interpretation-06-0187`

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