Document 824kd7nmmqGVM1KQz1vZ9mKN5

^MONVfEALTnorPENNSYLv,,, c*M . JL * a*'a DEPARTMENT OF ENVIRONMENTAL RESOURCES OCCUPATIONAL HEALTH 401 Buttonwood Street West Reading, Penns. 1960 November 9, 1971 Mr. William Sharkin, Owner Pennsylvania Perlite Corporation P. 0. Box 2002 R. D. #4 Allentown, Pennsylvania 18100 Mr. Shsrkin: i On October 7, 1971 a survey to evaluate employees' exposures to inert or nuisance particulates was conducted at bagging opera tions in your plant by Mr. Kenneth 0. Ensues, industrial hygienist. Airborne samples of nuisance particulates were collected by means of double tared cellulose acetate membrane filters, and these samples were subsequently analysed gravimetrlcally. The highest particulate concentration found was 1.56 milligrams per cubic meter of air. This value does not exceed the threshold limit value pre scribed in Chapter 201, Subchapter A, Threshold Limits in Pisces of Boployment. Based an the findings of this survey, no recommendations are made. belosed are pertinent Hygienic Information Guides and Chapter 201, Subchapter A. foclosures Frank.C. Sent*, Jr. ' Regional Industrial Hygienist Region II - South