Text For Citation: 01 Item/Group: 002 Hazard:

29 CFR 1910.119(d)(3)(ii): The employer did not document that equipment complies with recognized and generally accepted good engineering practices: (a) Location - 330 Ballardvale Street, Wilmington, MA: On or about May 27, 2021, the employer did not document that its ammonia refrigeration equipment complied with recognized and generally accepted good engineering practice (RAGAGEP), such as the International Mechanical Code (IMC), when they permanently installed an ammonia refrigeration system with a 22,000 lbs. system charge without an emergency pressure control system. IMC 2015, the employer's chosen RAGAGEP, Section 1105.9 requires that permanently installed refrigeration systems containing more than 6.6. pounds (3 kg) of flammable, toxic, or highly toxic refrigerant, or ammonia shall be provided with an emergency pressure control system in accordance with Section 606.10 of the International Fire Code. This hazardous condition exposed employees to the hazard of contact with anhydrous ammonia. (b) Location - 330 Ballardvale Street, Wilmington, MA: On or about May 27, 2021, the employer did not document that its ammonia refrigeration equipment complied with recognized and generally accepted good engineering practice (RAGAGEP), such as IIAR 2, when the maximum length of the discharge piping installed on Relief Line Designation C2 B-C exceeded the available pipe length as determined by Equation 15.5.1.1.1(1). IIAR 2 2014, the employer's chosen RAGAGEP, Section 15.5.1.1.1 requires that the design backpressure in the discharge piping at the outlet of pressure relief devices and fusible plugs, discharging through a single relief device shall be limited by the allowable equivalent length of piping determined by Equation 15.5.1.1.1(1) or 15.5.1.1.1(2). This hazardous condition exposed employees to the hazard of contact with anhydrous ammonia. (c) Location - 330 Ballardvale Street, Wilmington, MA: On or about May 27, 2021, the employer did not document that its ammonia refrigeration equipment complied with recognized and generally accepted good engineering practice (RAGAGEP), such as IIAR 2, when shut-off valve V204, which is used to drain oil from OP-1, was not capped, plugged, blanked, or locked while not in use. IIAR 2 2014, the employer's chosen RAGAGEP, Section 13.3.6 requires that shut-off valves connecting ammonia-containing equipment or piping to atmosphere shall be capped, plugged, blanked, or locked closed during shipping, testing, operating, servicing, or standby conditions when they are not in use. This hazardous condition exposed employees to the hazard of contact with anhydrous ammonia.