COMPLIANCE INFO_2005-2018 - Laserfiche WebLink

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(a) Prior to entering the site, the SSO shall calibrate the portable direct -reading air monitoring instruments upwind from the site in an uncontaminated area. (b) The SSO shall then determine background readings for all air monitoring instruments in this same upwind, off-site, uncontaminated area. (c) The SSO shall record the instrument calibration procedures and results and all background readings in the Site Safety logbook. (d) All personnel must enter the site from an upwind position, if possible. Work Zones: 1. At the beginning of each work shift the portable direct -reading instruments to vapor contamination is present. SSO shall perform initial air monitoring with identify the area(s) on-site where gas and 2. Based on these initial air monitoring readings, the SSO shall establish discrete work zones as follows: (a) Exclusion Zone or "Hot" Zone. The Exclusion or "Hot" Zone shall be defined as follows: 1. Wherever portable direct -reading air monitoring instruments register anything above the background readings established upwind and off-site in uncontaminated areas. 2. If portable direct -reading air monitoring instruments read background throughout the site, the exclusion zone shall be defined around the area(s) of known or suspected chemical contamination, or where drilling, excavation, soil sampling, or other invasive activity is to be performed. (b) Decontamination Zones. The Decontamination Zones shall be defined as follows: 1. The SSO shall establish a decontamination corridor adjacent to, and upwind from identified exclusion zones. The SSO shall set up both, equipment and personnel decontamination areas. (c) Support Zone. The Support Zone shall be defined as follows: 1. The SSO shall establish support zones upwind from the decontamination corridor where all portable direct -reading air monitoring instruments read background, at a distance of at least 20 meters from the exclusion zone. 2. The support zone shall be established such that support personnel may observe all personnel in the exclusion zone at all times. 3. If personnel must enter trenches or other excavations, a "buddy" shall remain near the excavation to maintain visual contact ("line of sight") with the personnel inside the trench or excavation at all times. 4. The SSO shall develop and teach all site personnel a system of hand signals that will enable the "buddy" to indicate to support zone personnel that an emergency exists inside the trench or excavation.