[' ', '3.', 'WHY', 'IS', 'THE', 'N.C.', 'ACADEMY', 'OF', 'SCIENCES', 'INVOLVED?', 'INITIALLY,', 'THE', 'DIVISION', 'OF', 'ENVIRONMENTAL', 'MANAGEMENT', 'PROPOSED', 'A', 'SAFETY', 'FACTOR', 'OF', '1/200', 'OF', 'THE', 'TLV', 'TO', 'DERIVE', 'ACCEPTABLE', 'AMBIENT', 'LEVELS', '(AALs)', 'FOR', 'COMMUNITY', 'EXPOSURE', 'INDUSTRY', 'OBJECTED', 'a)', 'TLVs', 'WERE', 'BEING', 'USED', 'OUT', 'OF', 'CONTEXT', 'b)', 'A', 'CONSTANT', 'SAFETY', 'FACTOR', 'IS', 'INAPPROPRIATE', 'THE', 'DIVISION', 'OF', 'ENVIRONMENTAL', 'MANAGEMENT', 'RESPONDED', 'BY', 'SEEKING', 'AN', 'INDEPENDENT', 'SCIENTIFIC', 'PANEL', 'TO', 'a)', 'REVIEW', 'THE', 'LIST', 'OF', 'PROPOSED', 'TOXIC', 'AIR', 'POLLUTANTS', 'b)', 'RECOMMEND', 'A', 'SUITABLE', 'APPROACH', 'FOR', 'DETERMINING', 'AALs', 'ZIECGLV', 'SOG']