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SITE-SPECIFIC HEALTH AND SAFEII�LAN %v.0' SSHP <br /> SITE INVESTIGATION AND REMEDIATION DESIGN 06/13/00 <br /> URS Greiner Woodward Clyde,Inc. Page 3 <br /> RESD Contract No.3014214 <br /> E. CHEMICAL HAZARD ANALYSIS (8 CCR§5192[B][41) <br /> (check if <br /> present at PEUSTEI :IDLH LEL-UEL Odor Threshold <br /> Chemical site) ( m) ( m) (%by volume) ( m) <br /> Benzene 1/5 skin Ca 50 1-2-7.8 12 <br /> Toluene 501150 500 1.1 -7.1 0.17 <br /> skin <br /> 800 <br /> Ethylbenzene 1001125 (10% 0.8-6.7 140 <br /> LEL) <br /> X lene(s)mixed 1001150 900 0.9-6.7 0.05 <br /> Methyl Cert-butyl ether ✓ (40®) NE 1.6- 15.1 NA <br /> MTBE <br /> Diesel NE NE 1.3-6 0.7 <br /> Gasoline 300/500 NE 1.4-7.6 0.25 <br /> NOTE: See HSP Section 4.1 for additional information on these chemicals. <br /> PEL Permissible Exposure Limit for chemical contaminants; Cal/OSHA (8 CCR §5155, Table AC-1) 8-hour time- <br /> weighted average(TWA)concentration <br /> STEL Short-term exposure limit(15-minute TWA not to be exceeded at any time during a workday) <br /> IDLH Concentrations immediately dangerous to life or health (National Institute for Occupational Safety and Health <br /> [NIOSH] 1997) <br /> Ca Chemical NIOSH considers a potential occupational carcinogen. <br /> NE Not established <br /> LEL-UEL Glammable limits in air(% by volume at room temperature); lower explosive (flammable) limit in air (LEL) - <br /> upper explosive(flammable)limit in air(UEL). <br /> Skin chemical may be absorbed into the bloodstream through the skin,mucous membranes and/or eye. <br /> TLV© Threshold Limit Value (American Conference of Governmental Industrial Hygienists [ACGIH] 8-hour TWA <br /> concentration for a 40-hour workweek to which nearly all workers may be exposed without adverse effect). <br /> Potential exposure routes (✓if route(s) pose a known or possible exposure hazard to site <br /> personnel). <br /> Exposure Route Known Possible <br /> Inhalation ✓ <br /> Ingestion ✓ <br /> Skin absorption ✓ <br /> Skin contact ✓ <br /> Eye contact ✓ <br /> MSW-1:114214102_Tracylh as p.do c <br />