Document 91DGqZB2JpK0onojJEBoQOGR5

UC WO-? INTERNAL CORRESPONDENCE METALS DIVISION To (Nme) Division Location Messrs. R. E. Byrne, Jr. B. L. Ingalls R. J. Kennedy, Sr. J. L. Myers H. B. Rhodes coov' Filaa P. 0. BOX 579 4625 ROYAL AVE., NIAGARA FALLS. NEW YORK 1430? cut, Ofij.netin, oeei. October 26, 1978 "Calidria" Asbestos Answering letter date suDiect Airborne Asbestos Counts Niagara Falls, New York Attached are the results of airborne asbestos counts obtained in the Niagara Falls Quality Control Lab on October 11, 1978. The personal TWA for Bob Kennedy, Sr. calculated from samples obtained throughout 5.76 hours was found to be 0.1 fibers/cc. The personal TWA for Bob Robozza for 4.06 hours was 0.04 fibers/cc. GJS/rmm Attachment Glenda J. Spencer ''frCg.'L X4I8635 AIRBORNE ASBESTOS COUNTS for Union Carbide Corporation Niagara Falls, New York I Date Sampled: October 11, 1978 Date Reported: October 17, 1978 Samples Collected By: Samples Analyzed By: Reported By: G. J. Spencer Union Carbide Corporation G. J. Spencer Union Carbide Corporation G. J. Spencer Union.Carbide Corporation Union Carbide Corporation Metals Division Niagara Falls, New York X4 I 8636 OBJECTIVE To monitor airborne asbestos emissions during the use of small quantities of "Calidria" asbestos. DESCRIPTION OF OPERATION Personal samples were obtained in Lab 118 during regular quality control testing of "Calidria" asbestos products. % X4I8637 SAMPLE EQUIPMENT AfID TEST PROCEDURES Samp!Inn and dust counting v?ere carried out in accordance with OSHA Regulation 1910.1001, using the Bayer, Zueiwalde 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 tlilcon phase contrast microscope at 400X 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 z5u 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 >5u 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 air sampled on an 8-hour, time- weighted average (TWA). The formula + CnTn describes the TWA FT v/here C * fiber count in fibers/cc and T = time. The regulations also stipulate a ceiling concentration of 10 fibers/cc 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). X4 1 8638 ample Ho. D-70 S-87 A-13 S-45 S-34 C-51 SUMMARY OF FIBER COUNTS Air Sample________ Tine Minute? __________ Operation Description___________ On: Off: On: Off: 8:35 9:31 9:53 ' 10:59 On: Off: On: Off: On: Off: On: Off: 10:59 12:00 12:30 2:07 2:07 2:30 2:50 3:33 On: 8:31 Off: 11:00 On: 11:00 Off: 11:55 On: 1:15 Off: 1:55 122 158 66 149 55 40 Personal - Bob Kennedy, Sr. - During quality control testing of various asbestos products. Located Bldg. 166, Lab 118. Personal - Bob Kennedy, Sr. - During quality control testing of various asbestos products. Located Bldg. 166, Lab 118. Personal - Bob Kennedy, Sr. - During quality control testing of Various asbestos products. Located Bldg. 166, Lab. 118. Personal - Bob Robozza - Located quality control Lab 118, Bldg. 166. Personal - Bob Robozza - Located quality control Lab 118, Bldg. 166. Personal - Bob Robozza - Located quality control Lab 118, Bldg. 166. Airborne Fiber Count (flbers/cc >5u) Possible Chrysotlle Amphlbole Asbestos Asbestos__ 0.1 0 0.1 0 0.03 0 0.03 0.11 0 0 0 0 D-70 S-87 A-13 TWA - Bob Kennedy, Sr. (5.76 hours) - 122(0.1)+158(0.1)+66(0.03)/346 = 12.2+15.8+1.98/346 - 29.98/346 0.1 Flbers/cc S-45 S-34 C-51 TWA - Bob Robozza (4.06) hours) - 149(0.03)+55(0.11)+40(0)/244 4.47+6.05+0/244 10.52/244 0.04 Flbers/cc X 41 8639