Document V3BgBd5vV3MGkyBaaadKKJ6E8

K 270 PARK AVENUE, NEW YORK, NEW YORK ICC!? To (Name) Division Location Floor Number Mr. J. Shortridge Metals Division P.O. Box K King City, California Copy tc Messrs. J. B. Browning T. W. Carmody K. S. Lane, M. D E. A. Piersall Date Originating Dept. Floor Number Answering letter date Subject April 24, 1978 Health, Safety & Environmental Affairs 22nd Floor Dear Mr. Shortridge, The findings for my survey of airborne asbestos in the RG 244 bagging area, April 12, 1978, are tabulated on the attached. The samples labeled PA were those collected by a sampling device worn by the bagger operator. The samples labeled GA " were general air samples that were collected in the hammermill area just off the bagging area. All samples were collected on open face filters and counted by phase contrast microscopy at a magnification of 400 times. The results show an early period of higher-than-usual fiber counts in the bagging operation but then drop down to about normal for the remainder of the work shift. Note that the operator wore the sampler through break and lunch periods, The results for the hammermill area were much lower than I found earlier this year although by visual estimate the area seemed to have about as much dust as before. This variation in findings is puzzling and since I used the same microscope for both sets of counts, implies that the fiber content of the hammermill environment is not necessarily indicated by the visible appearance. The findings for the bagger operator averaged out to be less than the TLV but it appears that owing to possible variation in fiber concentrations a respirator should be worn at all times. Thanks again for the usual fine cooperation I receive at your plant. Very truly yours, rt>. 7?? Paul W, McE PWM/vrd Attachment UCC 013047 ASBESTOS FIBER COUNT UNION CARBIDE CORPORATION KING CITY, CALIFORNIA APRIL 12, 1978 LOCATION TYPE OF SAMPLE TIME OF SAMPLE FIBERS J> 5 MICRON PER cc RG 244 Bagging Area Rebecca Nutter Operator PA 8:19a- 8:59a 9:00a- 9:40a 9:41a-10:41a 10:42a-ll:46a 11:47a-12:49p 12:50p- 1:50p 1:51p- 2:55p 2:55p- 3:50p Time-Weighted Average 2.28 3.25 0.60 1.02 0.16 0.87 0.95 0.95 1.11 Hammermill Area General GA 8:23a-- 8:48a 8:49a- 9:14a 9:15a- 9:42a 9:42a-10:07a 10:08a-10:43a 10:43a-ll:32a 2:21p- 2:46p 2:47p- 3:22p 3:22- 3:47p 3.82 2.47 5.14 3.32 2.60 2.84 3.65 2.89 1.56 REMARKS Respirator worn at all times Includes break periods Includes lunch break Not occupied area Includes lunch break UCC 013048 AIRBORNE ASBESTOS COUNTS for Union Carbide Corporation King City, California Cr* iw - ^8 ^ Date Sampled: Date Reported: April 19, 2Q, 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 UCC 013049 SAMPLE EQUIPMENT AND TEST PROCEDURES Sampling and dust counting were 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-pov/ered air pumps (M.S.A. type), calibrated to 2 liters per minute, were used to collect personal breathing zone and environmental samples on Hi Hi pore membrane filters of 0.0 micron porosity. Fiber counting was performed on a Nikon 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 *5u 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 length per cubic centimeter of air-sampled on an 8-hour, timeweighted average (TWA). The formula C^T-j + CTg + CnTn describes the TUA IT ` where 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). - 1- - UCC 013050 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. V - 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. UCC 013051 2- - SUMMARY OF FIBER COUNTS ' Sample _______ Air Sample________ No. Time Minutes Operation Description Airborne Fiber Count (fibers/cc >5p) Possible Chrysotile Amphibol Asbestos Asbestos 2-1-19 On: 1:07P 60 April 19, 1978 - Personal samples were Off: 2:07 obtained during bagging, shrink wrapping, palletizing RG-244, transfer of pallets 2-2-19 On: 2:08P 61 to storage area and delivery of samples Off: 3:09 to laboratory. Conditions: north door open, 5-10 mph wind from north, clear day. 1.5 1.9 0 0 2-2-20 On: 2:02P 81 April 20, 1978 - Personal sample obtained 1.4 Off: 3:23 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. Q 2-1-25 On: 12:52P 60 April 25, 1978 - Personal samples were Off: 1:52 obtained during bagging, shrink-wrapping, palletizing RG-244, transfer of pallets 2-2-25 On: 1:53P 60 to storage area and delivery of samples to Off: 2:53 laboratory. Conditions: north door open, 5-18 mph wind from south, rain in the morning. 2.1 1.9 0 0 1-1-26 On: 9:14A 65 April 26, 1978 - Personal sampels were Off: 10:19 obtained during bagging, shrink wrapping, palletizing RG-244, transfer of pallets 1-2-26 On: 10:21A 64 to storage area and delivery of samples to Off: 11:25 laboratory. Conditions: north door open, no wind, partly cloudy. 0.9 1.2 0 0 -3UCC 013052 4 /&