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Universal Health & Safety Plan For use on all high-risk,industrial and HAZWOPER projects Department of Toxic Substances Control ❑X Combustible Gas Indicator(CGI) ■ Explosivity May be combined with individual or multi-gas detectors. ❑X Particulate Monitor ■ MIE Model PDM-3 mini-RAM ■ Aerosols, mist, dust, and fumes ❑X Noise Monitor ■ TSI Quest Edge Personal Noise ■ n/a Dosimeter ❑ j Personal Monitoring/Badges ■ n/a ■ n/a 2.9.2 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 in excess of 1 time the action level.A reading in excess of action level outlined below will require additional ventilation(natural or mechanical)for 30 minutes,followed by re-monitoring. Monitoring Procedures and Action Levels Parameter Zone Location and .. Monitoring ❑X Volatile Organic Breathing zone, continuously < 1 ppm ■ Continue monitoring, may continue work Compounds(VOCs) during tasks where exposure to in required PPE and Volatile VOCs and volatile hydrocarbons is 1-25 ppm ■ STOP WORK and notify PM. Investigate Hydrocarbons possible (sustained for the cause of elevated VOC (total by PID) 3 minutes) measurements and identify measures to reduce concentrations(cover impacted soils, ventilation, etc.).Work activities shall only continue once levels have decreased to or below 5 units above background. If levels continue above 5 units, only individuals who are medically qualified to wear respiratory protection are permitted to continue work activities with Project Manager approval. Don Level C PPE(organic vapor respirator cartridges), continue monitoring, and initiate continuous air monitoring for benzene. Colorimetric tube for Vinyl Chloride >25 ppm ■ Cease work, exit, and contact the Site (sustained for Safety Officer, Site Supervisor, and 3 minutes) Project Manager. 0 Benzene Breathing zone, continuously >0.25 ppm ■ Cease work, exit the area, and contact (by PID with benzene- where indicated by VOC readings the Site Safety Officer, Site Supervisor, specific separation tube) and Project Manager. 0 Vinyl Chloride(with Breathing zone continuously >0.25 ppm ■ Cease work, exit the area, and contact colorimetric tube) where indicate by VOC readings the Site Safety Officer, Site Supervisor, and Project Manager ❑ Hydrogen Sulfide Breathing zone, continuously <5 ppm ■ Continue work activities. Contact the (multi-gas detector or during tasks where exposure to Site Safety Officer to investigate the individual H2S meter) hydrogen sulfide is possible potential for contributing factors. ©AECOM Restricted Universal Heath and Safety Plan Template(S4(DSC)AM-209-FM-C) 8 Revision 12 September 9,2021 PRINTED COPIES ARE UNCONTROLLED.CONTROLLED COPY IS AVAILABLE ON COMPANY INTRANET.