['Results', 'Table', 'l', 'summanzes', 'measurements', 'for', 'RSP,', 'CO,', 'COs.', 'nico-', 'Line;', 'average', 'number', 'of', 'persons', 'per', '10', 'm’:', 'and', 'average', 'pumber:', 'of', 'cigarettes.smoked', 'per', 'hour', 'per', '10', 'm!', '(where', 'applicable):', 'Because', 'of', 'the', 'large', 'variability', 'and', 'suspected', 'skew', 'of', 'measures,', 'means,', 'medians', 'and', 'ranges', 'are', 'given.', 'Measurements', 'inthe', 'cafeteria', 'smoking', 'areas', 'cach', 'are', 'based', 'onésamplesasare', 'measurements', 'inthe', 'cafeteria-nonsmok-', 'ing', 'areas.', 'Because', 'there', 'were.', 'no', 'perceptible', 'differences', 'between', 'cafeterias', 'in', 'Buildings.A', 'and', 'B,', 'both', 'for', 'smoking.', 'and', 'nonsmoking', 'areas,', 'their', 'data', 'have', 'been', 'merged:', 'Mes-', 'surements', 'in', 'nonsmoking', 'office', 'areas', 'in', 'Building', 'A', 'are:', 'based', 'on.', '8', 'samples,', 'and', 'measurements', 'in', 'nonsmoking', 'areas', 'in', 'Building', 'B', 'are', 'based', 'on', '2', 'sampies.', 'There', 'were', 'significantly,', 'more', 'persons:per', 'unit.area', 'inthe', 'cafeterias', 'than', 'in.', 'the', 'nonsmoking', 'offices.', 'The', 'numbers', 'of.', 'individuals', 'per', '10:m?', 'in', 'smoking', 'and', 'nonsmoking', 'areas', 'of', 'cafeterias,', 'however,', 'were', 'approximately', 'the', 'same:', 'As', 'might', 'be', 'expected,', 'both:', 'CO', 'and', 'CO;', 'levels:', 'were', 'higher', 'in', 'the', 'smoking', 'than.', 'nonsmoking', 'areas', 'of', 'the', 'cafeterias.', 'This', 'also', 'was', 'truc:for', 'RSPs.', 'Nicotine', 'levels', 'averaged', '14.0', 'zgim', 'in', 'the', 'smoking', 'area', 'and', '6.2', 'pgim’', 'in', 'the', 'nonsmoking', 'arca', 'of', 'the', 'cafeterias.', 'The', 'drop.in', 'RSPsand', 'nicozine', 'from', 'smoking', 'to', 'nonsmoking', 'arcas.', 'of', 'the', 'cafeterias', 'is', 'quite', 'steep', 'and', 'attests.to', 'the', 'rapididilution', 'of', 'ETS.', 'Contributions.1o', 'RSP,', 'CO', 'and', 'CO,', 'that', 'are', 'caused', 'by', 'smoking', 'in', 'the', 'designated', 'smoking', 'area', 'are', 'diluted', 'further', 'in', 'the', 'recirculated', 'air.', 'This', 'dilution:', 'can', 'be', 'seen', 'from', 'a', 'comparison', 'ofimeasurements', 'in', 'the', 'office', "areas'of", 'Building', 'A', 'with', 'Building:', 'B:', 'Concentrations', 'of', 'RSP,', 'CO', 'and!CO;', 'in', 'Building', 'A’', 'nonsmoking', 'areas,', 'which', 'received', 'recirculated', 'air', 'from', 'the', 'smoking', 'area,', 'are', 'approximately', 'the', 'same', 'as', 'those', 'measurements', 'taken', 'in', 'Building', 'B,,', 'which', 'did', 'not', 'receive', 'any', 'such', 'recisculated', 'air', '(also:', 'sec', 'Table', '11);', 'OF', 'special', 'interest', 'are', 'measurements', 'of', 'nicotine:', 'luisimportant', 'to', 'keepin', 'mind', 'that', 'the', 'detection', 'of', 'nicotine', 'in', 'air,', 'in', 'the', 'dilute', 'quantities.', 'in.', 'which', 'it', 'may.', 'be', 'present,', 'requires:', 'a', 'bengthy', 'sampling:', 'procedure:', 'As', 'the', 'concentration', 'of', 'nico-', 'Rine', 'inairidecreases,', 'Iargerait', 'samples', 'must', 'be', 'obtained', 'to', 'detect', 'that', 'concentration.', 'For', 'the', 'methodiused', 'here,', 'a', '2-hr', 'sample', 'at', '|', 'L/min', 'would', 'detect:', 'nicotine', 'concentrations', 'greaterthan', '0.8', 'g/m’.', 'Of', '4', 'samples', 'takenfor2hreach,', 'not', 'a', 'single', 'sample', "detected's", 'concentration', 'above', '0.8', 'ug/m’.', 'For', 'a', '4-hr', 'sample', "at'l", 'L/min,', 'the', 'lower', 'level', 'of', 'detection', 'is.', "0:4'ygim’.", 'Authat', 'level,', 'positive', 'detection', 'at', 'aiconcenira-', 'tion', 'of', '1.0', 'g/m’', "was'made", 'in', '|', 'out', 'of', '3samples.', 'For', 'the', '|', 'sample', 'taken', 'for', '8', 'hr,', 'the', 'lower', 'level', 'of', 'detection:', 'was', '0.2', 'wg/m’.', 'That', 'sample:measured', 'a', 'concentration', 'of', '0.8', 'pg/im?', '(findings', 'summarized', 'in', 'Table', '33).', 'Discussion', 'Studies', 'of', 'office', 'air', 'quality', 'have', 'demonstratedithat', 'signifi-', 'cant', 'reductions', 'in', 'ETS', 'related', 'RSP', 'may', 'be', 'achieved', 'in:', 'nonsmoking', 'areas', 'when', 'smoking', 'is', 'limited', 'to', 'designated', 'areas', 'that', 'are', 'not', 'ventilated', 'separately.”', 'The', 'extent', 'of', 'involuntary', 'exposure', '10', 'ETS,', 'however,', 'best', 'may:', 'be', 'estab-', 'lished', 'quantitatively', 'when', 'nicotine', 'iswsed', 'asthe', 'marker.', 'ht', 'has', 'been', 'suggested”', 'that', 'advances', 'in', 'measurement', 'technol-', 'ogy', 'may.', 'provide', 'grounds', 'for', 'reliance:on', 'nicotine', 'as', 'a', 'gen-', 'eralindicator', 'of', 'ETS.', 'Othercomponents', 'of', 'ETS', 'may', 'be', 'less.', 'useful', 'for', 'developing', 'an', 'ETS', 'exposure', 'index.', 'ETS', 'compo-', 'nents.are', 'complex.and', 'variable', 'and', 'also', 'include', 'many', 'con-', 'stituents', 'similar', 'to', 'those', 'emitted', 'from', 'other', 'sources.”', 'ame', '°The', 'observation', 'that', 'nicotine.in', 'sidesiream', 'Bmore', 'ia', 'mainty', 'th', 'the', 'vapor', 'phase', 'while', 'in', 'mainstream', 'smoke', 'itis', 'moreunthe', 'pamiculate', '(Oe', 'posit)', 'phase', 'poses', 'No', 'obstacle', 'tothe', 'use', 'of', 'nicotine', 'a8', 'an', 'index', 'of', 'ETS', 'infiltration', 'decause', 'building', 'occupants', 'are', 'Nol', 'exposed', 'to:', 'mainstream', 'smoke', 'uniess', 'they', 'actively', 'Coemoke.', 'The', 'nicotine', 'con-', 'centration', 'obtained', 'trom', 'sampling', 'the', 'sir', 'ise', 'representative', 'sample', 'of', 'ambient', 'ETS', 'inhaled', 'by', 'nonsmokers:', 'TABLET', 'Comparison', 'of', 'ETS', 'Related', 'Air', 'Quality', 'Parameters', 'in', 'Nonsmoking', 'Work', 'Areas', 'and', 'Designeted', 'Smoking', 'Aress.', 'Ain', 'tad', 'My', 'Asse.', '1149),', 'asp*', 'co:', 'orm’)', '—_', '(ppm)', 'Smoking', 'ereas', 'of', 'loan', '70', '3.8', "Catetorian'", 'A', '&', 'Range', '12000', 'U8-11.4', 'B', 'combined', 'Median.', 'ry', '23:', 'Nonsmoking', 'areas.', 'Mesn.', '32', '28', 'of', 'Coteterias', 'Range', '16-37', '12-45', 'A.B', 'combined', 'Medien:', 'ba', '24:', 'Wonsmoring:', 'bean', '8', '18', 'Office', 'ares,', 'Range', '11', '13-23', 'Buliding', 'A', 'Median', '6', 'U7', 'Nonsmoking', 'Moen', '?', '93s', 'office', 'ares,', 'Aange', 'es', '13-1.4.', 'Builsing', 'B', 'Medien', '7?', '1.35', 'pate', '“sean', 'outcoor.', 'RSPa', 'were', '10', 'p9/m’.', '®NA', '©', 'not', 'applicable', 'See', 'Tabie', 'I!', 'Gogromies', ',', '1983', 'co,', 'Nicotine', 'Persone', 'Cigeretties', '(ppm)', '&gim’)', 'hom', 'M#rnom"', 'ooo', '14', '13:', '12:', '450-1000', '<1.8-43.7', '0.70-3.42', '0.83+1.67', '650', '"', '18:', '12', '860', '62', '17', 'ND', '400-700', '<1.6-10.8', ' 0.76-2.5', 'wa?', 'oO', '680', '78', 'UT', 'wv', 'apo.', '0.73', '5.', '400-580', 'ad', '0.20-1.9:', 'WA', '>', '600', '0.48', 'cn', '450', '0.8', 'PS}', '400-800', '&', '0.83-1.28', 'WA', '450', '0.9', 'ee', 'loo)', 'as', 'SE', 'oats']