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sb sweet taste, throat dryness, cough, weakness, generalized aches, chills, nausea, and vomiting. The OSHA PEL is listed as 15 mg/m' for total zinc oxide dust, and 5 mg/m' for zinc oxide fume and the respirable fraction of dust. 4- The Cal/OSHA PEL is listed as 10 mg/m' for total zinc oxide dust, and 5 mg/m' for zinc oxide fume and the respirable fraction of dust. -d- The TLV is listed as 10 mg/m' for zinc oxide dust, and 2 mg/m' for zinc oxide fume. Prolonged ingestion of zinc can result in irritability, muscular stiffness and pain, loss of appetite, nausea and anemia. High levels of zinc in the diet may retard growth and produce defective mineralization of bone. 2.2.2 Other Particulate Matter ]Fugitive Dust] The potential threat from burn ash to public health and safety and the environment may be minimal if the sites are located in remote, less populated areas of the state where public contact is limited or nonexistent. Test results indicate the predominant metals of concern in burn ash [i.e., arsenic, beryllium, cadmium, chromium, copper, mercury, nickel, lead and zinc] are not readily soluble in water; therefore, not readily leachable into ground water. However, burn ash does pose a risk if it becomes airborne, is eroded into surface water, or comes in contact with skin. The potential routes for human exposure to the contaminants in burn ash are inhalation, ingestion, and direct skin contact. Exposure to contaminant via any of these routes may result in adverse health effects. In addition, there are many substances on the American Conference of Governmental Industrial Hygienists ]ACGIH] Threshold Limit Value [TLV] list, and many more that are not on the list, for which there is no evidence of specific toxic effects. Those that are particulates have frequently been called "nuisance dusts."Although these materials may not cause fibrosis or systemic effects, they are not biologically inert. At high concentrations, otherwise non-toxic dusts have been associated with the occasionally fatal condition known as alveolar proteinosis. At lower concentrations, they can inhibit the clearance of toxic particulates from the lung by decreasing the mobility of the alveolar macrophages. To recognize the adverse effects of exposure to otherwise non-toxic dusts, a TLV- Time Weighted Average [TWA] of 10 mg/m'for inhalable particulates and a TLV-TWA of 5 mg/m' for respirable particulates have been established. The particle size selective TLVs are expressed in three [3] forms: 4- Inhalable Particulate Mass TLVs for those materials hazardous when deposited anywhere in the respiratory tract. Sb Environmental Services,LLC© October,1003 California Integrated Waste Management Board Site Specific Health and Safety Plan Page 14 or62 Tracy Tire Fire Remediation Project