Document nR9wZyjZoRd580dzJ033YRZw

July 15, 1977 Mr. W. R. Hoopes U. R. Grace & Co. 55 Hayden Avenue Lexington, MA 02173 Dear Ron: I have reviewed the VDC Work Practice Guideline and you and your group should be complimented on the very excellent job. With reference to John McDonough's comments, I think they are well founded and while they are more safety oriented than health, the extra warning Is worthy of mentioning In the work practice. It Is a subtle type of hazard for which the worker should be Informed. I would like to see MCA get this published because It Is a fine piece / of work. I will not conment on the numbers Incorporated In the permissible exposure limits. Very truly yours. Zeb G. Bell, Jr. /zak cc: F. C. Dehn J. R. McDonough, M.D. J. T. Seawell SL 088405