PHMSA has concluded that Shasta Fire Equipment, Inc. of Redding, CA, certified DOT-specification, exemption, and special permit cylinders with Requalification Identification Number (RIN) D183 between March 6, 2013 and May 6, 2013, WITHOUT performing proper requalification testing to verify the suitability of the cylinders for continued service, as required by the Hazardous Materials Regulations (49 CFR, Parts 171-180)…