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

29 CFR 1910.119(d)(3)(i)(B): Written process safety information pertaining to the equipment in process did not include piping and instrument diagrams (P&IDs) accurately representing equipment that was existing and was part of the process: (a) Location - 100 Danton Drive, Methuen, MA: On or about 11/6/2017, the employers P&IDs for their ammonia refrigeration system contained the following discrepancies: 1. The pressure relief valves for the Horizontal Recirculator Package (HRP), High Pressure Receiver (HPTSR), and all four screw compressors vent to the same 4 relief line, and this is not depicted on the P&IDs. 2. The termination of the 4 relief line for the pressure relief valves associated with the HRP, HPTSR, and the screw compressors is not depicted on the P&IDs. 3. The P&IDs depicting Screw Compressors abbreviates Relief Line as RL, but on the P&ID legend it indicates that the abbreviation for Relief Line is RV. 4. Dual relief valves are depicted three different ways on the P&IDs and only one way is recognized on the P&ID legend. 5. The vertical risers connecting the Glycol Surge Drum and the Glycol Chiller are not depicted on the P&ID. 6. The drip pocket on the relief line for the pressure relief valves of the glycol surge drum are not depicted on the P&IDs. 7. Valve HRP-1 LX-1 is a normally closed valve and this is not indicated on the P&ID.