, A Otrelimet ARENT ORCAS A Nase zo REVIEW-DATE: August 16, 1995 SUBJECT: mame. acco & APY\bwriedl aM RETERMINATION, {CRCLE Cand CIICLASSIFAICATIO N RETAINED " GLASSIFICAT D 1; 3. CON AI: 1ON CHANGE Clashe ies 4. COSADINATEWine RAssrc0rs eee VEM SPECHEY): PROPOSAL FOR DECLASSIFICATION OF CERTAIN GASEOUS DIFF ENRICHMENT INFORMATION. (14) 4 = QO The National Institute for Occupational Safety and Health is presently investigating health issues at the Gaseous Diffusion Plants that involve information that is classified, restricted data. The NIOSH policy requires them to conduct their studies unclassified, and with unclassified information. It is possible, but much less desirable, to use information that is encoded in such a way as to protect the specific classified information, and to have a classified key to the encoding as a classified appendix to their report. 3 y ~~ \ = on P This request is intended to state the specific information that is required, and the way the information wil? be used. The investigation covers any occupational exposure to a list of specific chemicals, and will require any data that are relevant to the exposures. 1) The chemicals of concern consist of two groups. The first group are taken from the open literature about the gaseous diffusion plants. These are: NICKEL MERCURY ACETONE The classified com COPPER ARSENIC URANIUM FLUORINE PERCHLORETHYLENE CADMIUM CARBON TETRACHLORIDE PCB’S include: DELETED en | ae , A less desirable but possible alternative to naming the chemicals would be to encode the names by using terms like “Particulate A, Particulate B, and Chemical A, Chemical B." This approach would require the use of a classified appendix with the decoding information in it. 2) The monitoring results that are used for dose calculation would include volumetric concentrations of specific materials. A less desirable form of the data would be an encoding of dosages into "High, Medium, or Low" ranges, with the decoding of the ranges given in a classified: appendix. 3) The monitoring data should be identified by the building and department numbers to be correlated with worker exposure. It would be very useful to include job titles. A less desirable approach would be to identify buildings as "Building A, Building B." _ :a 4) The time of acquisition of the monitoring data is needed, including the ameof day, the day of the week, month and year. rends. The intent is to identify i