Laserfiche WebLink
• • <br /> • C5.3 Contaminant Monitoring <br /> The UST site will be monitored under the supervision of the SHO during all operations in <br /> the exclusion zone. The workers' breathing zone will be screened with an Organic Vapor <br /> Analyzer (OVA) or equivalent monitoring device, and near the working area with an <br /> explosimeter at intervals specified in Chemical Hazards Analysis (Attachment 5). The <br /> objectives of this monitoring are to: <br /> 1) assess the need for and adequacy of respiratory protection, <br /> 2) protect personnel and the public from possible releases of toxic or hazardous <br /> substances, <br /> 3) provide rationale for the selection or modification of the level of protection used at the <br /> site. <br /> Any air samples obtained for analysis will be analyzed by a laboratory that is accredited by <br /> the American Industrial Hygiene Association. <br /> Action levels have been formulated to provide response guidance during contaminant <br /> monitoring operations (Table C-1). These action levels will help determine the appropriate <br /> • action levels selected for this project. <br /> Table C-1 <br /> Action Levels for Determining Level of Protection <br /> OVA Reading' Action Taken <br /> —1 ppm (above background) Continue task, Level D protection, monitor <br /> every 60 min. <br /> 15 ppm - 50 ppm Continue task, Level C protection, monitor <br /> every 15 min. <br /> >50 ppm Discontinue task and withdraw from area, <br /> notify SHO <br /> ' The action level is reached when any reading above those listed is noted. <br /> The direct-reading instruments used for contaminant monitoring will be calibrated daily, <br /> and operated and maintained in accordance with the manufacturer's procedures <br /> accompanying each instrument. Contaminant monitoring and instrument calibration <br /> • records will be maintained by the SHO. <br /> C-12 <br />