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a <br /> The most significant: risk associated w <br /> ith <br /> exposure to aromatic <br /> CC-41-I. Skin contact Pwilllbemeliminated <br /> fuels is <br /> by `�3e of clothing, eye waar, and gloves <br /> hazard will be minimized and the inhalation <br /> using appropriate respiiator � <br /> devices as determined }a* <br /> 1 on-site 1 protective <br /> photoionization detector (PID) cal?bratedltomonitorinths benzene molecule <br /> with isabutylene gas . <br /> will e:;tablish an exclusion ezoneeencompaty ssing oa/conservative Manager50 <br /> foot radius frac, the work area. Limits of the exclusion zones may <br /> he modified horse an <br /> field measurements taken during the course <br /> of investigative activities. Access <br /> limited to required personnelwithin this zone will !ye. <br /> ri <br /> Current er:forceable and recommended ex osure limitations for <br /> Potential site contaminants are presented in Table 1. <br /> presented in Appendix I is additional hazard information on thAlso <br /> ese <br /> compounds. <br /> Table 1 <br /> Hazard Exposure Guidelines <br /> Substances Cal. OSHA <br /> __ PEL 1989-90 ACGIH <br /> -_--------------------------------------- .._TLV------- <br /> Benzene <br /> 25 p (TWA) 10 PPm (TWA) <br /> P;.n, (Ceiling) <br /> Toiuene 1.00 <br /> PPm ( (TWA) <br /> TWA) 100 PPm (T <br /> 150 opm {STF,L} . <br /> „ 150 PPm (STEL) <br /> Ethy)benzene <br /> 100 ppm (TWA) <br /> R:.{ <br /> i25 PAm {STEL) 100 PPM (TWA) <br /> . i 125 ppm (STEL) <br /> i Xylene 100 PPJQ (TWA) 100m <br /> 1..0 ppm (STEL) PA (TWA) <br /> i <br /> - 150 PFM (STEL) <br /> Gasoline <br /> 300 ppm (TWA) 300 PPm (TWA) <br /> w 500 PPm (STEL) sea ppm (STEL) <br /> Possible contaminants <br /> that could be encounterQd as <br /> Arese�,::1y known. <br /> r <br />