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Health and Safety Plan, Subsurface Investigation <br />Potential New Court Site, Stockton, California <br />cartridges. Protection against skin contact can be obtained through the use of chemically protective <br />clothing and gloves. <br />5.3.4 Tert-butyl Alcohol <br />Tert-butyl alcohol (TBA) is a colorless liquid or solid with a mothball like odor. It is used in the <br />manufacture of flavors and perfumes, as a solvent for pharmaceuticals and as a paint remover. Health <br />effects of exposure to TBA are dependent upon the duration. Short-term health effects include <br />headaches, dizziness, and drowsiness. TBA in liquid form may irritate the skin upon contact, and in <br />vapor form may irritate the eyes, nose, and throat. Long-term effects, such as repeated dermal exposure <br />to TBA, may cause drying and cracking of the skin. TBA has not been adequately evaluated to determine <br />whether brain or other nerve damage could occur following long-term exposure since many solvents and <br />other petroleum-based chemicals have been shown to cause such damage. In addition, long-term effects <br />may include reduced memory and concentration, personality changes (i.e., withdrawal, irritability), <br />fatigue, sleep disturbances, reduced coordination, and/or effects on nerves supplying internal organs <br />(automatic nerves) and/or nerves to the arms and legs (e.g., weakness, "pins and needles"). <br />Both the OSHA PEL and ACGIH TLV for gasoline are 100 ppm. <br />5.4 Assessment of Hazards <br />There is the potential for occupational exposure to occur through two direct routes (inhalation and skin <br />contact) and one indirect route (ingestion). Descriptions of exposure hazards and protective measures for <br />hydrocarbon fuels can be found in Section 5.4.1. <br />Inhalation - Release of volatile hydrocarbon contaminants during drilling and handling/collecting <br />environmental samples may expose personnel to airborne concentrations above established exposure <br />limits. Air monitoring for TPH and BTEX will be conducted during intrusive activities, and <br />requirements are established to upgrade respiratory protection in response to elevated airborne <br />concentrations (see Section 6.3). <br />Project 104290.19.01 18 January 2009