Respondent was assessed a civil penalty of $6,680 for four violations of the HMR, when it represented, marked, and certified DOT specification compressed gas cylinders as having been successfully retested and requalified in accordance with the HMR on a day when it had not verified the accuracy of its retest equipment (violation No. 1), and on other days when it failed to increase test pressure by the lesser of 10% or 100 psi on a second retest attempt after a malfunction of its retest equipment on a first retest attempt (violation No. 2); it allowed employees to perform functions subject to requirements in the HMR when the employees had not received hazmat employee training (violation No. 3); and it offered compressed gas cylinders containing nonflammable gas for transportation in commerce, and transported the cylinders in commerce, accompanied by shipping papers which failed to set forth technical names of constituent materials in parentheses (either between the proper shipping name and hazard class/division number or following the basic description) and included additional information (e.g., "330 CF") interspersed within the basic description (violation No. 4).