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Table 4-1 <br /> CHEMICALS POTENTIALLY ASSOCIATED WITH THE 425 NORTH UNION STREET SITE( ) <br /> 10lIfIL1TiOM <br /> CHEMICAL, IDLH ROUTES OF SYMPTOMS OF POTIMITIAL <br /> CAS NUMBER EXPOSURE LIMITI21 LEVEL EXPOSURE EXPOSURE (OV) <br /> POTENTIAL AROMATIC HYDROCARBON COMPOUNDS <br /> Benzene Ca-PEL = 1 ppm Ca(31 Inhalation, absorption, Irritation of eyes, nose, respiratory system;giddiness,headache, 9.24 eV <br /> 71-43-2 STEL = 1 ppm 3,000 ppm ingestion,contact nausea,staggered gait;fatigue, anorexia,lassitudes,dermatitis; <br /> Ce131 bons marrow depression;carcinogen. <br /> Ethylbenzene TLV 100 ppm 2,000 ppm Inhalation, ingestion, Headache,dermatitis, eye and mucous membrane irritation; 8.76 aV <br /> 100-41-4 PEL = 100 ppm contact narcosis,coma. <br /> STEL = 125 ppm <br /> Toluene PEL - 100 ppm 2,000 ppm Inhalation, absorption, Fatigue, weakness;confusion, euphoria,dizziness;headache, 8.82 eV <br /> 108.88.3 TLV . 50 ppm ingestion, contact dilated pupils, insomnia and dermatitis. <br /> STEL = ISO ppm <br /> Xylenes TLV = 100 ppm 1,000 ppm Inhalation, absorption, Headache;nausea;vomiting; abdominal pain;irritation eyes, nose, 8.56 eV <br /> 1330.20-7 PEL = 100 ppm ingestion,contact throat;dermatitis;dizziness,excitement,drowsiness,incoherence, <br /> STEL - 150 ppm staggering gait. <br /> (1) Petroleum and aromatic hydrocarbons are chemicels of concern based on previous investigations at the Site. <br /> (2) Most restrictive value listed: California PEL = OSHA, permissible exposure limit(during any 8-hr. work shift of a 40-hr.work week);STEL-NIOSH/OSHA short-teem <br /> exposure limit(a 15 minute exposure not to be exceeded at any time during the work day);Coil- NIOSH/OSHA,concentration not to be exceeded at any time during the <br /> day;TLV = ACGIH,threshold limit value(concentration not to be exceeded during any 8-hr. work shift of a 40-hr. week). <br /> (3) NIOSH,occupational carcinogen. <br /> NIA Not available <br /> REFERENCES: NIOSH Pocket Guide to Chemical Hazards, 1990 <br /> ACGIH Threshold Limit Values for Chemical Substances and Physical Agents and Biological Exposure Indices, 1993-1994 <br /> 29 CFR 1910.1000, Limits for Air Contaminants, 1993 <br /> 8 CCR 5155, PELs for Air Contaminants, 1993 <br /> Tomes Database <br /> UNICEASHP <br /> 6.9.94141 20.001-00 45 <br />