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EDUCATIONAL REFERENCES
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OSHA 1910.95 Regulation
http://www.osha.gov/pls/oshaweb/owadisp.show_document?p_table=STANDARDS&p_id=9735
OSHA Hearing Loss Recordable Criteria
http://www.osha.gov/pls/oshaweb/owadisp.show_document?p_table=STANDARDS&p_id=9641