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Universal Health & Safety Plan For use on all high-risk,industrial and HAZWOPER projects Department of Toxic Substances Control • Monitoring Potential exposure to chemical hazards from sources including materials brought on site to perform work, constituents of concern found in environmental media under investigation, and/or simultaneous operations being performed at the site by the property owner/third parties are reasonably anticipated to have the potential to result in vapors,fumes, aerosols, mists, and/or airborne particulates/dusts at or near permissible exposure limits. Therefore, air monitoring that will be implemented is described below. 6.1 Real Time Exposure Measurements/Equipment Monitoring shall be performed within the work area on site to detect the presence and relative levels of toxic substances.The data collected throughout monitoring shall be used to determine the appropriate levels of PPE. Monitoring shall be conducted as specified in the work permit and THA as work is performed. All instrumentation needs to be rated intrinsically safe to prevent fire or explosion. Table 6-1: Air Monitoring Instrumentation Needed ❑X Photo Ionization Detector(PID) ■ RAE Systems mini-RAE Petroleum hydrocarbons ■ Photovac Microtip _ Organic Solvents ■ Hnu Model Hnu(min. 10.6 eV bulb) ❑ Multi or 4 Gas Detectors ■ RAE Systems Multi-RAE ■ Lower Explosive Limit ■ Oxygen ■ Carbon Monoxide ■ Hydrogen Sulfide ❑ Combustible Gas Indicator(CGI) ■ Explosivity May be combined with individual or multi-gas detectors. ❑ Particulate Monitor ■ MIE Model PDM-3 mini-RAM ■ Aerosols, mist, dust, and fumes ❑ Personal Monitoring/Badges ■ N/A ■ N/A 6.2 Monitoring Procedures The monitoring procedures shown below are general guidelines for sampling activities. In general, readings are considered actionable if sustained readings are observed for 5 minutes or more or if intermittent peaks are seen more than 1 time the action level. A reading more than action level outlined below will require additional ventilation (natural or mechanical)for 30 minutes, followed by re-monitoring. Table 6-2: Monitoring Procedures and Action Levels Parameter Zone Location and .. Monitoring ❑X Volatile Organic Breathing zone, continuously < 5 ppm ■ Continue monitoring, may continue work Compounds(VOCs) during tasks where exposure to in required PPE and Volatile VOCs and volatile hydrocarbons is 5-25 ppm ■ STOP WORK and notify PM. Investigate Hydrocarbons possible (sustained for the cause of elevated VOC measurements (total by PID) 5 minutes) and identify measures to reduce ©AECOM Restricted Universal Heath and Safety Plan Template(S4[DSC]AM-209-FM2-C) 41 Revision 15 October 18,2023 PRINTED COPIES ARE UNCONTROLLED.CONTROLLED COPY IS AVAILABLE ON COMPANY INTRANET.