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1 V INTERNAL CORRESPONDENCE "CM UNION CARBIDE CORPORATION TECHNICAL CENTER ' P.O. BOX 8361, SOUTH CHARLESTON, WV 25303 To tKJame} Qiv .son Location Area P. P. Price D. E. Raines to -- c. W. Carman M. L. MillS^lr L. R. Noble D. R. Paugh R. E. Peele H. H. Frazier R. J. Sexton, M.D. F. Williams Date November 18, 1981 Originating Dec: IH/EP Area s_oeot Dust Monitoring in Construction Department Insulation Shop Institute Plant Gentlemen: The Institute Plant Industrial Hygiene group has completed monitoring of airborne dust in the Construction Department, Insula tion Shop, during the month of October 1981. During the monitoring KAYLO-IO and perlite insulation materials were being handled. Four teen personal samples, one source sample, and fifteen area samples were collected in the area of band saws where three-inch thick blocks of insulating materials were being sawed. The samples collected were analyzed by gravimetric technique for determining the total dust contents. The results of the monitoring are shown in the attach ment . The Threshold Limit Value (TLV) for perlite assigned by the A.C.G.I.H. is 10 mg/m3. This value is equivalent to a TLV standard for the total nuisance dust. In general, the air levels of the dust were found to be lower than the TLV. The on-site personnel complained of personal discomfort as a result of drying of the skin and the nasal membrane when working with the perlite materials. It was observed that a considerable amount of dust became airborne in the process of stacking and general handling of the sawed blocks. While there is in existance a ventilation facility for con trolling the dust generated from the sawing operations, there is no such facility for controlling the dust generated during stacking IOV. UCC 016537 -2- 11/18/81 and general handling of the material. We believe that a down draft ventilation system for controlling the dust generated during Cleanihg of the sawed blocks would be advantageous. It is recom mended that the Industrial Hygiene group be consulted when consider ations are given for installing such a system. Please inform the results of the Survey to employees who were monitored. If I can be of any assistance in this matter, please give me a call at extension 3750. Very truly yours, MAP/sc Attachment Manhar A. Patel UCC 016538 AIRBORNE NUISANCE DUST - INSULATION SHOP GRAVIMETRIC DETERMINATIONS, mg/m3 Date KAYLO 10/5/81 Type Sample S. M. Barker W. L. Alford H. E. Witt Source Area Sample Time Air Ci mg/m 360 0.5 Band saw cutting block insulation 364 0.4 Band saw cutting block insulation 358 0.1 Cementing lagging blocks 358 2.0 Source sample on cementing table 360 0.4 4' above No. 1 band saw 10/7/81 Area Area Area Area ' . 337 4.4 East wall 20 feet from forming table 336 1.7 15 feet south of No. 1 band saw 327 6.5 5 feet west of No. 1 band saw 326 7.3 5 feet west of No. 2 band saw 10/9/81 S. M. Barker W. L. Alford J. D. Hayes Area Area 203 3.5 Boxing cut blocks at No. 1 band saw 202 3.8 Cutting blocks at No. 1 band saw 206 1.5 Worked area of No. 2 band saw 200 2.3 4 feet above No. 1 band saw 204 1.5 8 feet from No. 2 band saw at west wall Goodtemp 10/13/81 W. L. Alford J. C. Hubbard,Jr. S. M. Barker H. E. Witt Area Area 10/15/81 W. L. Alford S. M. Barker H. E. Witt J. C. Hubbard,Jr. Area 10/16/81 Area Area Area Area Area 360 7.1 360 2.9 360 3.9 360 4.0 360 1.6 360 5.0 195 3.0 195 . 5.0 195 6.3 195 4.2 195 15.4 300 4.3 300 3.1 300 0.6 300 1.5 300 0.8 Removing blocks and sawing No. 1 band saw Transfer of sawed blocks to No. 2 saw Sawing lagging blocks at No. 2 saw Stacking sawed blocks 4 feet above No. 1 band saw 5 feet from No. 2 band saw west wall Removing blocks and sawing Transfer of sawed blocks Sawing lagging blocks Stacking sawed blocks 4 feet above No. 1 band saw 4 feet above No. 1 band saw 5 feet west of No. 2 saw along west wall 4 feet above tar pot at east wall Center aisle at toilet room entrance Face level at center aisle east wall HHF:me 10/20/81 UCC 016539 INTERNAL CORRESPONDENCE UNION CARBIDE CORPORATION TECHNICAL CENTER P.O. BOX 0361, SOUTH CHARLESTON, WV 25303 To [Name] Op . iS'CH Location A~ea P. P. Price D. E. Raines C. W. Carman M. L. Mills L. R. Noble~ D. R. Paugh R. E. Peele H. H. Frazier R. J. Sexton, M.D. F. Williams Date November 18, 1981 IH/EPOriQinat'.og Depr, A-ea Subject Dust Monitoring in Construction Department Insulation Shop Institute Plant Gentlemen: The Institute Plant Industrial Hygiene group has completed monitoring of airborne dust in the Construction Department, Insula tion Shop, during the month of October 1981. During the monitoring KAYLO-IO and perlite insulation materials were being handled. Four teen personal samples, one source sample, and fifteen area samples were collected in the area of band saws where three-inch thick blocks of insulating materials were being sawed. The samples collected were analyzed by gravimetric technique for determining the total dust contents. The results of the monitoring are shown in the attach ment . The Threshold Limit Value (TLV) for perlite assigned by the A.C.G.I.H. is 10 mg/m3. This value is equivalent to a TLV standard for the total nuisance dust. In general, the air levels of the dust were found to be lower than the TLV. The on-site personnel complained of personal discomfort as a result of drying of the skin and the nasal membrane when working with the perlite materials. It was observed that a considerable amount of dust became airborne in the process of stacking and general handling of the sawed blocks. While there is in existance a ventilation facility for con trolling the dust generated from the sawing operations, there is no such facility for controlling the dust generated during stacking UCC 016540 -2- 11/18/81 and general handling of the material. We believe that a down draft ventilation system for controlling the dust generated during Cleaning of the sawed blocks would be advantageous. It is recom mended that the Industrial Hygiene group be consulted when consider ations are given for installing such a system. Please inform the results of the survey to employees who were monitored. If I can be of any assistance in this matter, please give me a call at extension 3750. MAP/sc Attachment Manhar A. Patel UCC 016541 AIRBORNE NUISANCE DUST - INSULATION SHOP GRAVIMETRIC DETERMINATIONS, mg/m3 Date KAYLO 10/5/81 Type Sample S. M. Barker W. L. Alford H. E. Witt Source Area Sample Air Cone. Time mg/m3 360 0.5 Band saw cutting block insulation 364 0.4 Band saw cutting block insulation 358 0.1 Cementing lagging blocks 358 2.0 Source sample on cementing table 360 0.4 4' above No. 1 band saw 10/7/81 Area Area Area Area ' 337 4.4 East wall 20 feet from forming table 336 1.7 15 feet south of No. 1 band saw 327 6.5 5 feet west of No. 1 band saw 326 7.3 5 feet west of No. 2 band saw 10/9/81 S. M. Barker W. L. Alford J. D. Hayes Area Area 203 3.5 Boxing cut blocks at No. 1 band saw 202 3.8 Cutting blocks at No. 1 band saw 206 1.5 Worked area of No. 2 band saw 200 2.3 4 feet above No. 1 band saw 204 1.5 8 feet from No. 2 band saw at west wall Goodtemp 10/13/81 W. L. Alford J. C. Hubbard,Jr. S. M. Barker H. E. Witt Area Area 10/15/81 W. L. Alford S. M. Barker ^H. E. Witt J. C. Hubbard,Jr. Area 10/16/81 Area Area Area Area Area 360 7.1 360 2.9 360 3.9 360 4.0 360 1.6 360 5.0 195 . 3.0 195 5.0 195 6.3 195 4.2 195 15.4 300 4.3 300 3.1 300 0.6 300 1.5 300 0.8 Removing blocks and sawing No. 1 band saw Transfer of sawed blocks to No. 2 saw Sawing lagging blocks at No. 2 saw Stacking sawed blocks 4 feet above No. 1 band saw 5 feet from No. 2 band saw west wall Removing blocks and sawing Transfer of sawed blocks Sawing lagging blocks Stacking sawed blocks 4 feet above No. 1 band saw 4 feet above No. 1 band saw 5 feet west of No. 2 saw along west wall 4 feet above tar pot at east wall Center aisle at toilet room entrance Face level at center aisle east wall HHF:me 10/20/81 UCC 016542