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Kennedy/Jenks Consultants <br /> Table 2: Chemical Allowable Exposure Values and Exposure Symptoms <br /> Metals and Hydrocarbon <br /> Chemical TLV-TWAa STELa' PEL Acute Exposure Symptoms(c) Target Organs` <br /> Arsenic 10 ppm Not Established 10 ppm Ulceration of nasal septum,skin irritation, Skin ,liver, kidneys,respiratory system, • <br /> respiratory irritation/distress lymphaticsystem <br /> Cadmium 20 ppm Not Established 5 ppm Pulmonary edema,dyspnea,cough, Blood, kidneys,respiratory system, <br /> tightness in chest,nausea,diarrhea,chills, prostate <br /> aches <br /> Diesel 15 ppm Not Established None est. Irritation of eyes,skin,mucous Kidneys,liver,respiratory tract,skin,eyes <br /> membranes,blurred vision,headache, <br /> slurred speech <br /> Gasoline 300 ppm 500 ppm None est. Irritation of eyes,skin,mucous Eyes,skin,respiratory system <br /> membranes, blurred vision,headache, <br /> slurred speech <br /> Lead 50 ppm Not Established 50 ppm Weakness.headache,anemia,insomnia Central nervous system,gastrointestinal <br /> system,blood, kidneys,gingival tissue <br /> Notes: <br /> (a) TLV-TWA=Threshold Limit Value-8 hr.Time Weighted Average <br /> STEL=Short Term Exposure Limit <br /> American Conference of Governmental Industrial Hygienists.Threshold Limit Values(TLV)and Biological Exposure Indices for 1997. <br /> TLV-TWA reported in ppm represents parts of vapor per million parts of air by volume at 25'C and 760 torr.TLV-TWA reported in mg/m3 represents <br /> milligrams of substance per cubic meter of air. . <br /> (b) PEL=Federal OSHA(29 CFR 1910 Subpart Z)Permissible Exposure Level based on 8 hour time weighted average. <br /> (c) Source: U.S. Department of Health and Human Services. NIOSH Pocket Guide to Chemical Hazards.June 1994.Sittig, Marshall. 1985. Handbook of Toxic <br /> and Hazardous Chemicals and Carcinogens. Park Ridge,New Jersey. Noyes Publications. <br /> (d) "Skin"notation indicates route of exposure through cutaneous absorption. <br /> BNSF Mormon Yard—Soil Sampling HASP <br /> Mormon Yard, Stockton, California Page 1 of 1 <br /> Kennedy/Jenks Consultants©,March 2015 <br /> g:4a oupWmin4a 113113650Z1,M—y 4- jWminNasplhasp.dm <br />