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Kennedy/Jenks Consultants <br /> 7.3 Monitoring <br /> 7.3.1 Hazardous Substances <br /> Due to former industrial activities at the Railyard, volatile organic compounds may be a concern <br /> when conducting drilling and sampling activities within OU-2. As appropriate, field personnel will <br /> perform air monitoring with a direct reading organic vapor analyzer (OVA, OVM or HNU) during <br /> drilling and sample collection activities at each work location within OU-2. All readings shall be <br /> recorded in field logs. All direct reading instruments shall be calibrated according to the <br /> manufacturer's specifications. The following action levels will be used. <br /> • If OVA readings for a particular work area consistently exceed 5 parts per million (ppm) <br /> above background, then sampling will cease and personnel will withdraw from the work <br /> area. <br /> • If concentrations persist above 5 ppm, then Level C protection will be required if work is <br /> to continue. <br /> • If OVA readings exceed 10 ppm in the breathing zone while workers are in Level C <br /> protection, then work will cease and the source of the emission will be determined and <br /> eliminated before work continues. <br /> • Periodic measurements of the area will be taken before re-entry to ensure LEL has been <br /> reduced to safe working levels. <br /> 7.3.2 Noise <br /> Hearing protection will be worn by field personnel during drilling activities. <br /> 7.4 Site Control <br /> Work zones will not be established for Level D activities. Individuals not directly involved in <br /> ongoing work will be requested to stay at least 50 feet away from Level D activities. <br /> 7.5 Decontamination <br /> For activities requiring Level D protection and modified Level C protection without established <br /> work zones, it is unlikely that major decontamination will be necessary. At the conclusion of <br /> each day, disposable gloves and coveralls will be removed and disposed of in onsite containers. <br /> If full Level C protection is required, minimum decontamination procedures associated with <br /> Level C protection will be followed and established within the Contamination Reduction Zone. <br /> These procedures are presented in Table 5. <br /> Site Health and Safety Plan Page 12 <br /> Former Tracy Railyard, Tracy, California <br /> g:gs-groupladrrinWb10510565777.03_uprtW9-repatsVmk pla*finakVpendcestappc_hacplappc_text.doc <br />