Document zQK9Jg43MQMnQqQqE55XkZ3a7

CCB Hr. R.\/g. Brown# Personnel Manager BB - winchester October 30, 1969 Bear Bobs The question which you posed on respirators is a very common one. However, it is our conviction that a respirator must be U. S. Bureau o Mines approved for the particular application. When such a respirator is utilised its effectiveness for the particular job Is not questioned. This thought is the basic line in Industrial Hygiene Bulletin Ho. 671 (copy attached). The types of respirators which you described, which the men like, iscommonly known as a "Hartindale" d is of little or no value where health hazards re existent. This type of respirator should not utilized nor stocked in any Abex plant. I realize is does give the plant a problem of education - that f educating the workers to use the proper protective evice for the j6b at hand. However# this is the only tbod that you can utilize and know that your workers are protected. However# this may be quite a job when your personnel are complaining about a MSA Dustfoe 66 respirator whieh only weighs three ounces. Good Luck! CHBtcs cct C. B. Mallory Blackwell, Jr. C. H. BORCHSRDXNG, JR., SPNY 006360