['M.', 'Meckler', 'bacteria', 'growth,', 'they', 'were', 'not', 'unambiguously', 'the', 'cause', 'of', 'the', 'health-related', 'symptoms.', 'Environmental', 'air', 'samples', 'for', 'aero-allergens,', 'and', 'air', 'and', 'surface', 'samples', 'for', 'viable', 'organisms', '(bacteria', 'and', 'molds),', 'were', 'obtained', 'from', 'within', 'the', 'air-handling', 'system,', 'at', 'specified', 'complaint', 'and', 'noncomplaint', 'locations,', 'and', 'outdoors.', 'Samples', 'for', 'viable', 'organisms', 'were', 'taken', 'from', 'various', 'surface', 'types', '(i.e.,', 'inside', 'air-handling', 'units,', 'rugs,', 'books,', 'walls,', 'shelves,', 'air', 'duct', 'openings).', 'We', 'found', 'that', 'for', 'all', 'air', 'samples', 'under', 'typical', 'conditions', 'indoor', 'levels', 'were', '10', 'to', '70%', 'of', 'the', 'outdoor', 'levels.', 'No', 'unique', 'organisms', 'were', 'identified', 'indoors.', 'Agitation', 'of', 'items', 'with', 'obvious', 'mold', 'growth', 'substantially', 'increased', 'airborne', 'mold', 'spores.', 'High', 'bacteria', 'and', 'mold', 'counts', 'were', 'obtained', 'from', 'surface', 'samples', 'within', 'the', 'air-handling', 'unit', 'filters', 'and', 'wall', 'surface,', 'as', 'well', 'as', 'other', 'surfaces', 'not', 'typically', 'cleaned:', 'top', 'of', 'books,', 'floors', 'at', 'base', 'of', 'bookshelves,', 'and', 'surface', 'of', 'air', 'supply', 'and', 'return', 'ducts.', 'In', 'general,', 'normal', 'use', 'and', 'operation', 'of', 'the', 'library', 'was', 'assessed', 'to', 'pose', 'no', 'greater', 'health', 'hazard', 'than', 'one', 'would', 'encounter', 'outdoors.', 'The', 'conditions', 'were,', 'however,', 'favorable', 'to', 'an', 'increase', 'in', 'microorganism', 'growth', 'that', 'could', 'become', 'a', 'health', 'problem', 'if', 'not', 'corrected', 'and', 'controlled.', 'Individuals', 'susceptible', 'to', 'allergic', 'reactions', 'may', 'be', 'more', 'prone', 'to', 'respond', 'as', 'though', 'they', 'were', 'outdoors.', 'Indoor', 'Air', 'Quality--Sick', 'Building', 'Syndrome', 'Industrial', 'Client', 'IITRI', 'Project', 'C08845', 'September-December', '1985', 'The', 'objective', 'of', 'the', 'study', 'was', 'to', 'identify', 'the', 'source', 'of', 'several', 'environ-', 'mentally', 'related', 'complaints', 'in', 'an', 'office', 'building', 'and', 'to', 'recommend', 'steps', 'that', 'would', 'minimize', 'or', 'eliminate', 'the', 'complaints.', 'Both', 'complaint', '(study)', 'and', 'noncomplaint', '(control)', 'work', 'areas', 'were', 'studied.', 'All', 'or', 'parts', 'of', 'the', 'work', 'areas', 'were', 'subjected', 'to:', '(1)', 'air', 'monitoring', 'for', 'carbon', 'dioxide', '(CO),', 'formaldehyde', '(HCHO),', 'and', 'volatile', 'organic', 'compounds', '(VOC)', '(2)', 'air', 'exchange', 'rate', 'determination', '-—', 'S6S908248', '-56-']