Document bBYDRXV4JQgaydQ2wn0R72g0g

INTER-COMPANY MEMO KOCH INDUSTRIES INC DATE: TO: April 23,1992 Ail Employees PLAINTIFFS EXHIBIT KRC-121 FROM: Occupational Health and Safety SUBJECT: Respirator Selection Air purifying (cartridge) respirators shall be selected according to the following: KespratorType Half mask, organic vapor cartridge (Both disposable and reusable) Full face, organic vapor cartridge Half mask + full face, acid gas cartridge Benzene at 1-10 ppm other organic vapors * Benzene at 10-50 ppm other organic vapors * . Chlorine Gas, Acid Vapor at low levels Note: All contaminants at high levels, and H2S at any level require the use of self-contained breathing air only. * Contact Occupational Health and Safety for proper protective equipment needs. SEB/krk 42392.DOC K016685