Key words: UV radiation, calibrations, sunlamps, tech support, research
OST performed spectral measurements and hazard analysis of several tungsten halogen lamps at the request of the OC. It was determined that the product in question emitted sufficient UV radiation to exceed the ACGIH Threshold Limit Value (TLV) in less than 8 hours at a distance of 5 inches. However, at a more realistic distance of 12 inches, the TLV was not exceeded in the 8 hr period.
At the request of NIH, OST performed spectral measurements and analysis of UV emissions from a wood-burning fire. There was concern that xeroderma pigmentosa (XP) patients who lack the ability to repair UV radiation-induced DNA damage would be at risk in this type of exposure situation. Although there is little dose-response data available for XP patients, measurements data suggested that the amount of UV radiation emitted from a fire appears to be of little concern.
OST also analyzed data for a project on effects of UVA1 radiation in the progression of the SLE (an autoimmune disease) in a mouse model, and provided spectral measurements and analysis for evaluation of risk for Squamous Cell Carcinoma from sunlamp exposure. In addition, OST evaluated and edited the FDA Tentative Final Monograph on UVA testing of Sunscreen Products.