work practices and materials used and previous results of chelation therapy and urine, blood, and hair lead (cas 7439-92-1) analyses were studied to investigate sources of potential exposure to lead in the photographic studio of the giorgi process, inc. (sic-7333) in yonkers, new york on december 27, 1978 and january 31, 1979. an authorized representative of the employees at giorgi process, inc requested the investigation for approximately three employees. hair lead analyses completed in november and december 1976 showed 38 parts per million (ppm) and 76ppm respectively, indicating mild lead poisoning. the investigators conclude that confirmation of diagnosis of lead intoxication was not possible since all laboratory work was normal except for one hair lead. no lead hazard was identified. the investigators recommend that absorption and ingestion of photographic dyes be avoided by use of protective finger coverings, frequent handwashing, or application of dyes with a cotton swab