PurePak Corporation — Hazardous Materials Safety Interpretation

Page 1U.S. Depaitment 400 Seventh Street, S.W. of Transportation Washington, D.C. 20590 Pipeline and Administration Hazardous Materials Safety APR 14. 2005 Mr. David Giaccio Ref. No. 05-0065 PurePak Corporation 324 S. Bracken Lane, Suite #3 Chandler, AZ 85224 Dear Mr. Giaccio: This is in response to your March 22, 2005, letter requesting clarification of the Hazardous packagings for the combination packaging specified in §173.158(f(3) must have a maximum Materials Regulations (HMR; 49 CFR Parts 171-180). Specifically, you ask if plastic inner capacity that is not greater than 2.5 L or whether a larger container can be used and only filled to 2.5 L. Nitric acid of 70% or less concentration offered for transport by rail, highway, or water may be packaged in certain combination packagings with plastic inner packagings not over 2.5 L capacity further individually overpacked in tightly closed metal packagings (§ 173.158(f)(3)). The use of the term "not over" means that you may not use a plastic inner packaging with a maximum capacity greater than 2.5 L. I hope this satisfies your request. Sincerel John A. Gale Office of Hazardous Materials Standards Chief, Standards Development 173.158 A) (3)) 050065#

Page 2MAR-22-2005 02:08FM FROM-SemiGrind Corporation 480-953-4094 T-020 $173.158() (3) Combination Packägings PurePak Corporation 05-0065 To: Edward Mazzullo 324 S. Bracker Lane Suite #3 Chandler AZ 85224 DOT/PHEMSA DHM-10 480-926-0022 400 7" Street SW Fax: 480-545-9288 Washington DC 20590 Fax number: 202-366-3012 Date: 3/22/2005 Regarding: Clarification of Maximum Quantity Dear Sir: I would like to obtain written clarification regarding the transportation of Nitric Acid UN 2031 PG 11. packagings. Is 2.5L the brim or "Maximum Quantity" of the container, or can a larger Sec. 173.158(f) (3) describes a combination package containing 2.5L plastic inner container be used and filled to 2.5L? Thank you in advance for your assistance. Regards, David Giaccio#