ATMOSPHERIC RESEARCH + EXPOSURE ASSESSME; BUILDING SCIENCE; CA AIR RESOURCES BOARD; CLAYTON ENVIRONMENTAL ASSOCIATES; ENVIRONMENTAL PHOTOGRAPHIC INTERPRETATIO; EPA, ENVIRONMENTAL PROTECTION AGENCY; HAL LEVIN + ASSOCIATES; HL TURNER GROUP; JOHNS HOPKINS HOSPITAL; JOHNS HOPKINS UNIV; OSHA, OCCUPATIONAL SAFETY & HEALTH ADMINISTRATION; RESEARCH DIVISION; SAN FRANCISCO GENERAL HOSPITAL; STANFORD UNIV; UNIV OF CA SAN FRANCISCO; UNIV OF CT HEALTH CENTER; UNIV OF MA MEDICAL CENTER; VA OFFICE OF RESEARCH + DEVELOPMENT; VA POLYTECHNIC INST + STATE UNIV