Text For Citation: 01 Item/Group: 003 Hazard:

29 CFR 1910.119(d)(3)(i)(B): The employer's piping and instrument diagrams were not accurate and did not represent equipment that was existing and was part of the process. At a worksite at 832 E 3rd Street, Milan, MO 64556: The employer failed to protect employees from hazards related to highly hazardous chemicals at the facility. Employees engaged in repairing, replacing, operating, inspecting, testing, and maintaining covered process equipment were exposed to toxic, cryogenic, and fire hazards in the event of an anhydrous ammonia release. This was last demonstrated on or about May 13, 2024, and at times prior thereto, when the following equipment including, but not limited to piping, valves, pressure vessels, safety devices and instruments that were existing and part of the ammonia refrigeration system were not reflected in matching piping and instrument diagrams (P&ID). a) A compressor "HS-2" was marked in the filed as such but was reflected on PID-06 as HSC2. b) A compressor "HS-2" hand unknown valve type associated with the compressor marked 102125 in the field and was not reflected on PID-06 with no other identification information provided. c) A high temperature recirculator "HTR-1" had an angle valve associated with a pump that was marked on HTR1-51 in the field but was reflected as 43 on the PID-09 with no other identification information provided. d) A high temperature recirculator "HTR-1" had an angle valve associated with a pump that was marked on HTR1-49 in the field but was reflected as 35 on the PID-09 with no other identification information provided. e) A high temperature recirculator "HTR-1" had an angle valve associated with a pump that was marked on HTR1-27 and LTR-01 in the field but was reflected as 13 on the PID-09 with no other identification information provided. f) A low temperature recirculator "LTR-1" had a check valve associated with a pump that was marked on LTR-38 in the field but was reflected as 28 on the PID-10 with no other identification information provided. g) A low temperature recirculator "LTR-1" had a relief valve associated with a sight glass stack that was marked on LTR-16 in the field but was reflected as 48 on the PID-10 with a tag number of 102612. h) A low temperature recirculator "LTR-1" had an angle valve associated with a pump that was not marked in the field but was reflected as 37 on the PID-10 with no other identification information provided. i) A low temperature recirculator "LTR-1" had an angle valve associated with a pump that was not marked in the field but was reflected as 39 on the PID-10 with no other identification information provided. j) A low temperature recirculator "LTR-1" showed an angle valve with a gage that was associated with a pump that did not exist in the field but was reflected as 39 on the PID-10 with no other identification information provided. k) A low temperature recirculator "LTR-1" showed an angle valve with a gage that was associated with a pump that did not exist in the field but was reflected as 40 on the PID-10 with no other identification information provided. l) A low temperature recirculator "LTR-1" had a pressure relief valve associated with a sight glass stack that was marked on LTR-16 with a set pressure of 150 p.s.i. in the field but was reflected as 48 with a set pressure of 250 p.s.i. on the PID-10 with no other identification information provided.