[' ', 'S9-Z', ',', '50977', '5084', ' ', 'TADLE', '7-25.', '(continued)', 'ne', ' ', 'Level', 'Grouping', 'Order', 'of', 'of', 'evidence?', 'based', 'on', '%', 'magnitude', ';', 'EPA', 'Slope', 'Molecular', 'Potency', '(og', 'Compounds', 'CAS', 'Number', 'tlumans', 'Animals', 'criteria', ' .(mg/kg/day)-!', 'weight', 'fadex', 'Index)', 'tt', 'Nitrosamines', 'DimethyInitrosamine', '62-75-9', 'I', 's', 'B2', '25.9(not', 'by', 'qt)', '74.1', '2x1otd', '4', 'Diethylaitrosamine', '§5-18-6', 'I', '5', '62', '43.5(not', 'by', 'qf)', '102.1', 'axiot3', '+4', 'Dibutylaltrosamine', '924-16-3', 'I', '$', 'B2', '5.49', '158.2', '9x10t2', 'cx)', 'N-nttrosopyrrolidine', '930-55-2', 'i', 'S', 'B2', '2.13', '100.2', '2x1ote', '+2', 'N-nitroso-N-ethyturea', '759-73-9', '1', 'Ss', 'B2', '32.9', '171', '4x1ot3', '44', 'N-nitroso-H-methylurea', '684-93-5', 'I', 's', 'B2', '302.6', '103.1', 'ax1044', '44', 'N-nitroso-diphenytamine', ' 86-30-6', 'I', 's', 'B2', '4.92x10-3', '198', '14100', 'i)', '*PCBs', '1336-36-3', 'i', '5', 'B2', '7.7', '324', '2x10+3', '+3', '*Tetrachlorodibenzo-', ':', 'p-dioxin', '(TCDD)', '1746-01-6', 'I', 's', '82', '1,56x10+5', '322', 'Sx10t7', '48', 'Tetrachloroethylene', '¢', '127-18-4', 'I', 's', 'B2', '5.1%10-2', '165.8', '8x100', '+1', '(Perchtoroethylene)', 'Toxaphene', '8001-35-2', 'i', 's', '2', '113', 'ana', '5xlot?', '3', 'Trichloroethylene', '79-01-6', '1', 's', 'B2', 'L.ixi972', '131.4', '1x109', '0', '2,4,6-Trichlorophenal', '88-06-2', 'I', 'S_', 'b2', '1.99x1072', '197.4', '4x100', '#1', 'Unleaded', 'gasoline', 'vapor', 'I', '5', 'a2', '3.5x10-3', '1iod', '4xto-!', 'f)', 'Vinyl', 'chloride', '75-01~-4', 'Ss', 'Ss', 'A', '2.3', '62.5', '1x1042', '42', 'A', 'A', 'A', 'Ne', 're', 'et', 'as', '*', 'Sufficient', 'evidence;', 'L', '=', 'Limlted', 'evidence;', 'I', '=', 'Inadequate', 'evidence,', 'banimal', 'slopes', 'are', '95%', 'upper-bound', 'slopes', 'based', 'on', 'the', 'linearized', 'multistage', 'model.', 'They', 'are', 'calculated', 'based', 'on', 'animal', 'oral', 'studies,', 'except', 'for', 'those', 'indicated', 'by', 'I', '(animal', 'inhatation),', 'W', '(human', 'occupational', 'exposure),', 'and', 'H', '(human', 'drinking', 'water', 'exposure),', 'Muman', 'slopes', 'are', 'point', 'estimates', 'based', 'on', 'the', 'linear', 'nonthreshold', 'model.', 'Not', 'all', 'of', 'the', 'carcinogenic', 'potenctes', 'presented', 'in', 'this', 'table', 'represent', 'the', 'same', 'degree', 'of', 'certainty,', 'All', 'are', 'subject', 'to', 'change', 'as', 'new', 'evidence', 'becomes', 'available.', 'The', 'slope', 'value', 'is', 'an', 'upper', 'bound', 'in', 'the', 'sense', 'that', 'the', 'true', 'value', '(which', 'is', 'unknown)', 'is', 'not', 'likely', 'to', 'exceed', 'the', 'upper', 'bound', 'and', 'may', 'be', 'much', 'lower,', 'with', 'a', 'lower', 'bound', 'approaching', 'zero.', 'Thus,', 'the', 'use', 'of', 'the', 'slope', 'estimate', 'in', 'risk', 'evaluations', 'requires', 'an', 'appreciation', 'for', 'the', 'implication', 'of', 'the', 'upper~', 'bound', 'concept', 'as', 'well', 'as', 'the', '“weight', 'of', 'evidence”', 'for', 'the', ']!kel', 'thood', 'that', 'the', 'substance', 'Is', 'a', 'human', 'carcinogen.', '©The', 'potency', '{ndex', '1s', 'a', 'rounded-off', 'slope', 'in', '(mmol/kg/day)-!', 'and', 'is', 'calculated', 'by', 'multiplying', 'the', 'slopes', 'in', '(mg/kg/day)-!', 'by', 'the', 'molecular', 'welght', 'of', 'the', 'compound,', '4the', 'molecular', 'weight', '1s', 'based', 'on', 'the', 'welghted', 'average', 'of', 'the', 'compounds', 'present', 'in', 'gasoline.', 'Some', 'vartation', 'may', 'be', 'expected', 'among', 'samples.', 'NA', '=', 'Kot', 'applicable,', '"', '.', ':', '*.', 'Currently', 'under', 'review,', 'y', ':', ' ']