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6. Hazard Assessment <br />This section addresses the potential hazards identified with waste characterization investigation <br />of the site, which includes but is not limited to chemical, physical, and environmental hazards. <br />Additional job hazard information, as obtained subsequent to this plans approval, shall be <br />provided in Appendix 1 of this SSHSP. Hazard characterization of the site and selection of <br />worker protection methods has been determined from previous waste characterizations <br />investigations at other sites and site history. <br />HAZARD ASSESSMENT <br />To provide protection for personnel on-site, the following potential hazards have been identified <br />at the Santa Fe Road Illegal Disposal Site related to the waste characterization investigation: <br />chemical hazards, physical safety hazards, and non -ionizing radiation. This determination is <br />based on information provided related to the contaminants identified at the site and based on the <br />work tasks performed. <br />CHEMICAL HAZARDS <br />A number of chemical hazards of concern that may be present in the soil, groundwater, leachate <br />and landfill gas at the site are discussed below. The information that follows provides a <br />discussion of the hazard concerns that may be present at the site. This SSHSP includes the <br />OSHA permissible exposure limits (PELs) which are the regulatory exposure limits for <br />workplace safety. The PELs are time -weighted average (TWA) exposure concentration. When <br />applicable the short-term exposure limits (STELs), and concentrations in the air that would be <br />immediately dangerous to life or health (IDLH), are also provided. STELs are TWA 15 -minute <br />exposure concentrations that should not be exceeded at any time during a workday, even if the <br />8 -hour exposure limit is not exceeded. <br />A. Heavy Metals <br />Bum ash sample analysis obtained from previous waste characterization investigations from <br />other sites indicate that non -hazardous household or municipal waste contains various heavy <br />metals. Test results indicate the predominant metals of concern in burn ash are not readily <br />soluble in water; therefore, not readily leachable into ground water.' However, bum ash can <br />pose a risk if it becomes airborne and is inhaled, ingested, or in direct contact with the skin. The <br />predominant heavy metal associated with bum ash can be found in Table 1 — Heavy Metals; the <br />metals of primary concern include: antimony, arsenic, barium, beryllium, cadmium, total <br />chromium, copper, lead, mercury nickel, selenium, and thallium. <br />Draft Health & Safety Plan -Statewide Bum Dump Investigation, May 2001 <br />Santa Fe Road Disposal Site — Health & Safety Plan 10 October 2002 <br />