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U U 0 Some sampling activities require use of special sampling equipment. Persons using this equipment should be trained prior to performing sampling. • There is a concern of punctures and cuts. Special protective equipment will be required. 0 Heat stress is a hazard, especially where PPE is required. Use work-rest regimens and maintain hydration. 8.0 LEVEL OF PROTECTION Staff members and contractors of Avalon responsible for the project have completed a 40-hour health and safety training course fulfilling initial instruction requirements specified in 29 CFR 1910.120(e)(2). An Organic Vapor Analyzer (OVA) flame ionization detector or an Hnu photoionization detector (PID) or equivalent with a 11.7 eV probe will beTused to establish background conditions each day before operations begin. Readings will be taken upwind and downwind from work areas to determine background levels of volatile compounds in the air. Organic vapor levels will be monitored in the breathing space in the work area with the PID to measure the vapor levels in the breathing zone of onsite personnel. Breathing zone PID readings will be used to establish the level of personal protective equipment (PPE) to be used. Site work will be initiated in Level D protection. A PID with an 11.7 eV lamp, or equivalent, will be used to monitor vapors in the breathing zone. Positive breathing zone readings are not expected, but if sustained readings of 25 ppm above background levels are obtained, work should cease until engineering controls are instituted to prevent vapors from reaching the breathing zone. The level of 25 ppm represents the most conservative exposure limit for volatile organic compounds found on the site (Table 1). This can be accomplished by increasing air speed (mechanical fans), improving ventilation, or changing work activities (move personnel farther away). If engineering controls cannot reduce breathing zone readings to below 25 ppm above background, the level of protection will be upgraded to modified Level C. Respirators used for Level C will be required to have both dust/mist filter and an organic vapor filter. i The analytical laboratory will be one accredited by the American Industrial Hygiene Association. The results of the personal air monitoring for lead and PCBs will dictate what type of respirator is appropriate. A quarter or half-face air purifying respir"ator can be used for airborne lead concentrations below 0.5 mg/m'. A full-face respirator can be used for airborne lead levels not exceeding 2.5 mg/m' will require an upgrade to MLAvalon Environmental Consultants - 9627-001-6 Kashmar Singh Joes Truck Plaza January 9,2001 11 Lathrop,'California