Paramount Tank, Inc. — Hazardous Materials Safety Interpretation

Page 1U.S. Department of Transportation 400 Seventh Street, S.W. Washington, D.C. 20590 Research and Special Programs Administration JUN 2 / 2000 Mr. Howard Grey Ref. No. 00-0050 Paramount Tank, Inc. 14066 Orange Avenue Paramount, CA 90723 Dear Mr. Grey: This is in response to your letter of February 4, 2000 concerning mounting an MC 306 cargo tank onto a new chassis under the Hazardous Materials Regulations (HMR; 49 CFR Parts 171-180).: Specifically you asked if an MC 306 AL cargo tank mounted onto a new chassis, certified by a Design Certifying Engineer, with changes in the bolster mounts to comply with newer MC 306 AL tanks could continue to be registered as an MC 306 AL cargo tank. The answer is yes. A cargo tank mounted onto a new chassis is not considered a new; cargo tank, : thus could be continued to be an MC 306 AL cargo tank if all applicable regulations are followed in § 180.413. I hope this satisfies your request. Sincerely, Delmer F. Billings Chief, Standards Development Office of Hazardous Materials Standards 178.345 000050#

Page 2New and Used Petroleum Transportation Tanks PARAMOUNT TANK, INC. PARAMOUNT, CALFORNIA 90723 14066 ORANGE AVENUE LONG BEACH (562) 6345184 LOS ANGELES (213) 7740600 FAX (562) 634-8275 Johnser 8178.345 Mr. Edward T. Mazzullo Director, Office of Hazardous Materials Standard 00-0050 U.S. Department of Transportation 400 Seventh Street S. W Washington D.C. 20590 Dear Sir: We have a customer that has a Fruehauf MC 306 AL truck tank. The truck tank was manufactured with four bolster mounts. He has requested that the number four bolster be removed and the tank be mounted on a new chassis using the front 3 bolsters. These bolsters are to be reinforced as needed to accept the additional loads and the mounting is to certified by a Design Certifying Engineer. This change would make the tank comply with the newer MC 306 Al tanks. No welding or changes are to be made to the barrel, valves or equipment. May this tank continue to be registered as an MC 306 AL truck tank Your earliest reply would be appreciated as a new truck chassis is available to accept this mounting. Sincerely; Paramount Tank, Inc. Howard fre Ioward Gre#