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4 <br /> SUMMARY QF ANTICIPA.TED CHEMICAL HAZD <br /> COMPOUND PEL/TLV TWA STEL <br /> Benzene 1 5 <br /> Ethylbenzene 100 125 <br /> Toluene 100 150 <br /> TPH 300 500 <br /> Xylenes 100 150 <br /> Values from the American Conference of Governmental Industrial Hygienists(TLV); the Occupational <br /> Safety and Health Administration (PEL); or CCR Table AC-1 of Section 8-5155 of Title 26 (0), whichever is <br /> most stringent. The Threshold Limit Value(TLV)is the time-weighted average(TWA)concentration for a 40- <br /> hour week, to which all workers may be repeatedly exposed without adverse effect. The PEL is the OSHA <br /> permissible exposure limit,and is also a TWA. The Short-Term Exposure Limit(STEL)is the concentration at <br /> which workers can be continually exposed for a short period of time. Exposures at the STEL should not be <br /> longer than 15 minutes and should not be repeated more than four times in an 8-hour period. There should be at <br /> least 1 hour between each 15-minute exposure at the STEL. <br /> CONTROL OF HAZARDS <br /> TRAINING AND SAFE WORK PRACTICES <br /> All field personnel for this project will have attended a 40-hour health and safety . <br /> training course for conducting work at hazardous waste sites and annual 8-hour training <br /> updates. This course satisfies the initial training requirements of-29 CFR 1910.120 (OSHA <br /> regulation of hazardous waste site activities). Additionally, Geraghty & Miller has an <br /> occupational health-monitoring program in accordance with OSHA 29 CFR 1910.20. This <br /> program involves an annual physical examination. Any subcontractor is responsible for <br /> medical monitoring of its employees. <br /> LEVELS OF PROTECTION <br /> Level D protection is required during construction activities as specified by the HSO,or <br /> his or her designee. It may become necessary during the course of the work to upgrade the <br /> level of protection to Level C in the immediate work area. Although unlikely, it may become <br /> necessary during the course of the work to upgrade the level of protection to Level B in the <br /> immediate work area. If this becomes necessary, all work will be suspended, and the area will <br /> be secured and vacated immediately. Changes in the level of protection will be determined by <br /> the Site HSO. <br /> Project No. RCO291.001 <br /> GERAGHTY MILLER. INC. t3 <br />