Document rpKj46Eed9je2LGr0O95xrLzJ

U<_ 14.' 2 METALS DIVISION To (Name) Division Location Mr. E. W. Shortridge UCC - Metals Division King City, California Copy to Messrs. R. E. Byrne, Jr. B. L.. Ingalls P. W.. McDaniel J. L . Myers H. B . Rhodes W. C . Thurber File p. o. box 579-4625 royal ave., Niagara falls, new york 1430; Date June 14, 1978 Originating Dept, "Calidria" Asbestos Answering letter date SuDieci Airborne Asbestos Counts for Union Carbide Corp. King City, California Attached are the results of ceiling counts performed on short-term samples obtained at King City on April 19, 20, 25 anti 26, 1978. These samples are the second series obtained for the cooperative monitoring program. As further results become available, they will be issued. Glenda J. Spencer, GJS/rmm Attachment Blind P.S. - EWS Earl, We had some difficulty matching samples with information provided on data sheets submitted by King City, therefore, we were unable to count three samples, (one from 4/20 and two from 4-24) Two samples received were marked 2-1-24 and one was marked 2-1-78. Since the time factors indicated on data sheets were of varying duration, we were unable to even estimate ceiling concentrations in any of these three cases. Therefor^ <4 n q _ our report does not contain counts for 4/25 and only one count obtained AIRBORNE ASBESTOS COUNTS for Union Carbide Corporation King City, California Date Sampled: Date Reported: April 19, 20, 25, 26, 1978 June 14, 1978 Samples Collected By: Samples Analyzed By: Reported By: Union Carbide Corporation King City, California Glenda J. Spencer Union Carbide Corporation Glenda J. Spencer Union Carbide Corporation Union Carbide Corporation Metals Division Niagara Falls, New York M09242 SAMPLE EQUIPMENT AND TEST PROCEDURES Sampling and dust counting v-ere carried out in accordance with OSHA Regulation 1910.1001, using the Bayer, Zunwalde and Brown method for counting asbestos fibers by phase contrast microscopy (Bureau of Occupational Safety and Health, Feb. 1969). Battery-powered air pumps (M.S.A. type), calibrated to 2 liters per minute, were used to collect personal breathing zone and environmental samples on Millipore membrane filters of 0.0 micron porosity. Fiber counting was performed on a Nikon phase contrast microscope at 4Q0X utilizing a Porton reticle for sizing and field definition. Two results have been reported for each sample - they are: 1. Chrysotile Asbestos - Any fiber having an aspect ratio >3 and a length a5y that is in the operator's judgement chrysotile. In the event of doubt and in the absence of further information, any fiber having the above physical dimensions will also be counted as chrysotile. 2. Possible Amphibole Asbestos - Any fiber having an aspect ratio >3 and a length >5y that is not obvious to be material other than asbestos. This includes all amphiboles and material similar in appearance. COMMENTS The OSHA regulations permit a maximum limit of 2 fibers greater than 5 microns in lenqth per cubic centimeter of airsampled on an 8-hour, timeweighted average (TUA). The formula C^Tj + C2T2 + CnTn describes the TWA Zl where C = fiber count in fibers/cc and T = time. The regulations also stipulate a ceiling concentration of 10 fibers/ greater than 5 microns which is not to be exceeded at any time. TEST RESULTS The details of sample collection and resultant fiber counts are listed in the attached table(s). A `T 0r*\ 92-4J 1- - OBJECTIVE To monitor airborne asbestos emissions at the subject company's production facilities during the bagging and palletizing of "Calidria" RG-244 asbestos. DESCRIPTION OF OPERATION Production operation included bagging, shrink-wrapping and palletizing RG-244. Personal samples were obtained on April 19, 20, 25, 26, 1978. The following conditions during monitoring were noted by King City: April 19, 1978 Full bagging, shrink-wrapping and palletizing RG-244, pallets moved from bagging room to storage area, samples delivered to laboratory. Weather conditions: north door open, clear day, 5-10 mph wind from north. April 20, 1978 Full bagging, shrink-wrapping and palletizing RG-244, pallets moved from bagging room to storage area, samples delivered to laboratory. Weather conditions: north door open, light wind from north, rain P.M. April 25, 1978 Full bagging, shrink-wrapping, palletizing RG-244, pallets moved from bagging room to storage area, samples delivered to laboratory. Weather conditions: north door open, 5-18 mph wind from south, rain A.M., cloudy P.M. April 26, 1978 Full bagging, shrink-wrapping, palletizing RG-244, pallets moved from bagging room to storage area, samples delivered to laboratory. Weather conditions: north door open, no wind, partly cloudy. 2- - Sample No. 2-1-19 2-2-19 2-2-20 2-1-25 2-2-25 4-1-26 4-2-26 Air Sample Time Minutes On: 1:07P Off: 2:07 60 On: 2:08P Off: 3:09 61 On: 2:02P Off: 3:23 81 On: 12:52P Off: 1:52 On: 1:53P Off: 2:53 60 60 On: 9:14A Off: 10:19 On: 10:21 A Off: 11:25 65 64 SUMMARY OF FIBER COUNTS Operation Description Airborne Fiber Count (fibers/cc >5y) Possible Chrysotile Amphibol Asbestos Asbestos April 19, 1978 - Personal samples were obtained during bagging, shrink wrapping, palletizing RG-244, transfer of pallets to storage area and delivery of samples to laboratory. Conditions: north door open, 5-10 mph wind from north, clear day. 1.5 1.9 0 0 April 20, 1978 - Personal sample obtained during bagging,shrink-wrapping, palletizing RG-244, transfer of pallets to storage area and delivery of samples to laboratory. Conditions: north door open, light wind from north, rain in the afternoon. 1.4 Q April 25, 1978 - Personal samples were obtained during bagging, shrink-wrapping, palletizing RG-244, transfer of pallets to storage area and delivery of samples to laboratory. Conditions: north door open, 5-18 mph wind from south, rain in the morning. 2.1 1.9 0 0 April 26, 1978 - Personal sampels were obtained during bagging, shrink wrapping, palletizing RG-244, transfer of pallets to storage area and delivery of samples to laboratory. Conditions: north door open, no wind, partly cloudy. 0.9 1.2 0 0 3- - X409245