# Poitevent Carrère & Denègre L.L.P. — Hazardous Materials Safety Interpretation - **operation:** document - **citation:** 99-0269 - **title:** Poitevent Carrère & Denègre L.L.P. — Hazardous Materials Safety Interpretation - **source type:** guidance - **agency:** Pipeline and Hazardous Materials Safety Administration - **status:** guidance - **official:** true - **published on:** 1999-12-02 - **effective on:** Not available - **summary:** 99-0269 response to Poitevent Carrère & Denègre L.L.P. concerning 171.8. - **machine formats:** - **json:** https://regulus.evalyn.ai/document/phmsa-interpretation-99-0269.json - **markdown:** https://regulus.evalyn.ai/document/phmsa-interpretation-99-0269.md - **app url:** https://regulus.evalyn.ai/document/phmsa-interpretation-99-0269 - **source url:** https://www.phmsa.dot.gov/sites/phmsa.dot.gov/files/legacy/interpretations/Interpretation%20Files/1999/990269.pdf **body:** <<>> U.S. Department of Transportation 400 Seventh Street, S.W. Washington, D.C. Special Programs Research and Administration DEC 2 1999 Mr. Stanley A. Millan Jones Walker Waechter Ref. No. 99-0269 Poitevent Carrère & Denègre I.L.P. 201 St. Charles Avenue New Orleans, LA 70170-5100 Dear Mr. Millan: This is response to your letter dated October 1, 1999, concerning the definition of hazardous substance under the Hazardous Materials Regulations (HMR; 49 CFR Parts 171-180). Under $ 171.8, a hazardous substance is defined including its mixtures and solutions, that: (1) is listed in as a material, Appendix A to § 172.101 of the HMR; (2) is in a quantity, in one is in a package, which equals or exceeds its reportable quantity; and (3) concentration by weight which equals or exceeds the in the table under S 171.8. concentration corresponding to the RQ of the material, as shown For example, n-Butyl phthalate has an RQ of 10 pounds. To meet the definition of a hazardous substance, the quantity of n-Butyl concentration by weight must be equal to or be greater than 0.02% phthalate in each package must equal or exceed 10 pounds, and the (200 ppm) .. I hope this satisfies your request. Sincerely, Transportation Regulations Specialist Office of Hazardous Materials Standards 990269 <<>> JONES WALKER WAECHTER POITEVENT BAH CARRÈRE & DENÈGRE L.L.P. 81718 Harsok STANLEY A. MILLAN 201 ST. CHARLES AVENUE FAX 504-582-8583 504-582-8328 NEW ORLEANS, LOUISIANA 70170-5100 smillan@jwlaw.com October 1, 1999 99-0269 BY FAX (202) 366-3012 Director, Office of Hazardous Materials Standards Mr. Edward Mazzulo U.S. DOT/RSPA (DHM 10) 400 Seventh Street, S.W. Washington, D.C. 20590-0001 Re: Hazardous Substances Dear Mr. Mazzulo: I request any interpretative guidance you have on the definition of hazardous substances at 49 C.F.R. 171.8 with respect to solutions and the conjunctive (i.e., and) test that a hazardous substance is (1) a listed substance, (2) in a designated quantity, and (3) in a certain solution concentration. Thank you for your consideration. Tot Millan Stanley A. Milíar SAM/ksc BATON ROUGE OFFICE: FOUR UNITED PLAZA • 8555 UNITED PLAZA BOULEVARD • BATON ROUGE, LOUISIANA 70809-7000 • 225-231-2000 • FAX 225-231-2010 WASHINGTON, D.C. OFFICE: SUITE 600, 499 SOUTH CAPITOL STREET, S.WV. • WASHINGTON, D. C. 20003 • 202-828-8363 • FAX 202-828-6907 LAFAYETTE OFFICE: SUITE 120 • 500 DOVER BOULEVARD • LAFAYETTE, LOUISIANA 70503 • 318-406-5610 • FAX 318-406-5620 N0415661.1 - **truncated:** false - **body characters:** 2502