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Site Health and Safety Plan <br />19133 East Liberty Road, Clements, California <br />August 16, 2022 (Revised June 27, 2023) <br />Page 11 <br /> <br />Sharp Environmental Technologies, Inc. <br />Chemical <br />Name <br />Route of Exposure Symptoms Target Organs <br />1,2,4-Trimethyl- <br />benzene <br />Inhalation, ingestion, <br />skin and/or eye contact <br />Irritation eyes, skin, nose, <br />throat; respiratory system; <br />bronchitis; hypochromic <br />anemia; headache, drowsiness, <br />lassitude (weakness, <br />exhaustion), dizziness, nausea, <br />incoordination; vomiting, <br />confusion; chemical <br />pneumonitis (aspiration liquid) <br />Eyes, skin, respiratory <br />system, central nervous <br />system, blood <br /> <br />5.3 Exposure Limits <br />Chemical name TWA/STEL/Ceiling IDLH/LEL <br />TPH-gasoline 85 ppm/400 ppm 10,000 ppm <br />Benzene 1 ppm/5 ppm 500 ppm (carcinogen) <br />Toluene 50 ppm/150 ppm/300 ppm 500 ppm <br />Ethylbenzene 100 ppm/125 ppm 800 ppm <br />Xylenes 100 ppm/150 ppm 900 ppm <br />Tetrachloroethene (PCE) 25 ppm/100 ppm/300 ppm 150 ppm (carcinogen) <br />Trichloroethene (TCE) 25 ppm/100 ppm/300 ppm 1,000 ppm (carcinogen) <br />1,1,1-Trichloroethane (TCA) 350 ppm/450 ppm/800 ppm 700 ppm <br />1,1-Dichloroethene (1,1-DCE) 1 ppm/NE/NE NE <br />PAHs 0.1 mg/m3 1,750 mg/m3 (carbon) <br />Chlordanes 0.5 ppb 100 ppb <br />Dieldrin 0.25 ppb 50 ppb <br />4,4-DDD 0.5 ppb 500 ppb <br />4,4-DDE 0.5 ppb 500 ppb <br />4,4-DDT 0.5 ppb 500 ppb <br />Toxaphene NA NA <br />Naphthalene 10 ppm/15ppm/NE 250 ppm/0.9% <br />1,2,4-Trimethyl-benzene 25 ppm/NE/NE NE/0.9% <br />Tertiary butyl alcohol (TBA) 100 ppm/150 ppm/NE 1,600 ppm <br />Arsenic 0.01 mg/m3 5 mg/m3 <br />Lead 0.1 mg/m3 100 mg/m3