ABX Air, Inc. — Hazardous Materials Safety Interpretation

Page 1U.S. Department DEC 4 2003 of Transportation 400 Seventh St., S.W. Washington, D.C. 20590 Special Programs Research and Administration Ms. Karen Schatzmann Hazardous Materials Manager Ref. No. 03-0232 145 Hunter Dr. ABX Air, Inc. Mail Code: GR-HM207 Wilmington, OH 45177 Dear Ms. Schatzmann: This is in response to your request for clarification of the term "stowed together" as it applies to hazardous materials being Materials Regulations (HMR; 49 CFR Parts 171-180). transported by aircraft in accordance with the Hazardous you ask whether the wording "may not be stowed together with that Specifically, restrictive than the wording "may not be placed next to each class" in "Note 2" in § 175.78(c)(4) is meant to be more in the event of leakage" as stated in S 175.78(a). other or in a position that would allow a dangerous interaction The answer is no. "Note 2" in § 175.78 (c) (4) does not have a more restrictive The meaning of the term "stowed together" in meaning than the wording packages containing hazardous materials which might react in paragraph (a) which states that other or in a position that would allow a dangerous interaction dangerously with one another "may not be placed next to each in the event of leakage." (FAA) may require additional aircraft loading and stowage The Federal Aviation Administration check with your FAA-assigned Principal Operations Inspector requirements as part of its airworthiness standards. You should concerning any additional requirements. I hope this information is helpful. If you have additional questions, please do not hesitate to contact this office. Sincerely, Hate a Nitchell Regulatory Review and Reinvention Hattie I. Mitchell, Chief Office of Hazardous Materials Standards 030232 175.78#

Page 2NEXAIR. MCIntyre $175.78 Loading Unloading 03-0232 September 11, 2003 Mr. Edward Mazzullo, Director Dept. of Transportation Office of Hazmat Standards Div., DHM-10 400 7* Street S.W. Washington, D.C. 20590 Dear Sir: the segregation table. We question the meaning of the wording "may not be stowed together with that We would like a written interpretation to the regulations cited as 49CFR 175.78(c)(4) regarding "note 2" of class". Does "stowed together" mean "may not be placed next to each other or in a position that would allow a dangerous interaction in the event of leakage" as spelled out in 175.78(a), or is 175.78(c)(4) meant to be more restrictive? Your attention to this question would be appreciated. Sincerely, Spaine Shal Karen Schatzmann ABX Air, Inc. Hazardous Materials Manager#