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' • • Project No. 014-95262 Page No. 17 ' protective equipment. Personal monitoring will be randomly performed using personal air pumps and ' appropriate sampling tubes. Previous data from similar jobs may be used to determine PPE levels. On all jobs, airborne contamination and downhole volatile organic compound vapor concentrations will be measured primarily by the use of a direct reading instrument such as a photoionization detector. If concentrations approach established levels, Drager®detector tubes will be used to determine the presence ' and concentration of benzene. Site visits/inspections may be conducted by the Krazan&Associates Safety Officer to insure compliance with this plan. ' 8.1 Photoionization Detector ' During this investigation, the ambient air, drilling returns, soil samples, and boreholes will be screened with a calibrated H-nu® brand, portable photoionization detector (PID). The PID is a direct ' reading real-time analyzer that is capable of detecting most of the volatile hydrocarbons constituents present in a vapor phase. The PID to be used for this investigation uses a 10.2 electron volt lamp and is calibrated using an iso-butylene calibration gas. Iso-butylene is a relatively safe calibration gas similar in ionization potential to benzene (the carcinogen of primary concern present in petroleum products). 8.2 Drgger®Detector Tubes Drager®detector tubes may be used to determine airborne concentrations of chemicals of concern in the breathing zone during this investigation. A member of the field team will take detector tube readings if high PID measurements or suspect conditions so warrant. 9.0 SAFETY AND HEALTH TRAINING All field personnel will be trained in methods of safely conducting field activities. This plan is intended to provide additional site specific information to accomplish this goal. It will be the responsibility of the Project Directors, Safety Officer, and Safety Task Leader to ensure the field team has access to, reads, and understands this plan. It will be the individual's responsibility to bring to the attention of the Project Director or Safety Officer any portion of this plan and related training they do not fully understand. Prior to the commencement of the field portion of this investigation, the field team will meet to discuss the ' contents of this plan and make sure all members understand it. At the site meeting, all field team members will be instructed regarding the health and safety hazards. Especially: KRAZAN&ASSOCIATES, INC. Offices Serving the Western United States 95262.HSP