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sb zinc and dust. Over time, as the metal scan analyses show that some of these metals are not present at concentrations approximating their respective action levels, analyses for these metals may be halted. When removal of a new debris pile is initiated, the aforementioned metal scan will be analyzed by the laboratory to determine the concentrations in that area. With respect to VOCs, benzene will be collected each day, however when pyroytic oil is encountered, other VOCs will be analyzed as well. They include ethyl benzene, toluene and xylene. PNAs and nitrosamines will be collected for analyses twice per week on a regular basis. The sampling plan will be re-evaluated each week to determine its effectiveness [i.e., if additional sampling should be conducted or if sampling can be curtailed]. During each week, SBES will consider what activities the contractor is providing, weather conditions, type and description of debris being removed as well as the type and amount of dust suppression eQuipment being utilized. Personal sampling pumps [i.e., SKC brand] that automatically maintain a constant Flow rate to collect samples will be utilized. Immediately before sampling, the ends of the sampling media are uncapped and tygon tubing is connected to the backup end so that air can be drawn through the sampling train with a pre-calibrated, battery operated pump. The samples are collected at a particular Flow rate, so as to collect the desired volume of air to comply with analytical methodologies and then sent to an accredited laboratory for analyses. In addition, pumps will be protected with disposable coverings to make decontamination procedures easier. 6.2.2.1 Laboratory Analyses Direct-reading personal monitors are available for only a few specific substances and are rarely sensitive enough to measure the minute [i.e., parts of contaminant per billion parts of air] Quantities of contaminants, which may nevertheless, include health changes. Therefore, to detect relatively low-level concentrations of contaminants, long-term or "full-shift" personal air samples must be analyzed in a laboratory. Full-shift air samples are collected by means of a pump which draws air through a specific type of sampling media. 6.2.3 Area and Perimeter Sampling Additionally, SBES will collect area and perimeter samples throughout the remedial operations. Specific perimeter locations will be chosen based upon remediation activities and wind direction. These locations are utilized throughout the sampling process to access the potential migration of contaminants. If the analyses measures detectable levels of specific compounds, the Project Industrial Hygienist will notify the LFR project manager who will notify the Sukut project manager that additional dust control is warranted. Visual inspection of dust on the site during the remedial operations is also used by the Project Industrial Hygienist. sb Environmental Services,LLC© October,2003 Caltfornia Integrated waste Management Board Site Specific Health and Safety Plan Page 40 of 62 Tracy Tire Fire Remediation Project