Document ZJVjJ5ROD1keLpRb5o7qNMDyO

RESULTS OF AIR SAMPLES H.K. PORTER COMPANY Charlotte, North Carolina Report Prepared By: Howard E. Ayer July, 1964 ) t0o z9 PLAINTIFFS EXHIBIT 1 Enclosed, are three copies of results of air sanples taken at the Charlotte Works, H. K. Porter Company, Charlotte, North Carolina. Counts on these samples have been completed for some time, but tabulation and calculation have only recently been finished. ' As you know, a major part of our survey was done with membrane filters. For these filters, counts are reported for total fibers and for fibers longer than 10 p. These counts were made on Millipore lype AA filters rendered transparent by a mixture of $0% diethyl oxylate and $0% dimethyl phthalate. The counts were made using a U mm (1|3X) objective with phase contrast illumination. Where fiber counts are shown on the same line with an impinger count, these represent simultaneous, adjacent samples by the two methods. Most other membrane filter sam ples at particular operations were taken by personal samplers worn for periods of 1-2 hours by the individual operator. General air samples wore taken either by a sequential sampler or in an array of an elutriated and an unelutriated membrane filter, an elutriated midget impinger and an unelutriated midget impinger. The elutriated samples, which used a horizontal elutriator of the British National Coal Board Design ahead of the sampler, were merely to develop information as to relative "respirability," etc., and are not reported here. ' There are no official limits established in this country for asbestos fiber counts. As with dust counting, the count obtained depends upon the sampling and counting method. We have compared impinger counts with companion membrane filter sample counts, and while there are dif ferences between operations and between similar operations in different plants, it appears from samples taken so far that fiber counts by the *t ___ i........... _____________________ fy/* ^ ^^ -2 - r<r. v;. L, hilson -- July 20, 196.U ; reviously described method are equivalent to impinger counts of i> rrppcf as follows: Total fibers -- 3o/cc fibers longer than, q ;x -- 30/cc fibers long.::' than 10 jo. -- 15/cc It should be enphnoiee.-d that these u.ur.bors are averages, based on a IV'itei number of samples in four plants. They are included only to v:' seme significance to the large number of fiber counts reported. f..~ filer counts are a much more direct measure of the asbestos ibir emposure than the impinger dust count, and it might be prudent 1.1 suggest additional controls "hen the above concentrations are ex ceeded ever, if the impinger counts are within the 5 mppcf. 'fe hope that the above information will be helpful to you in dis cussing these results with the company. Counts on the other four North Carolina plants have been completed, and you vdll receive the other reports as soon as they can be typed. Sincerely yours. Enclosures reward 1. Ayer ' I 1 Senior Sanitary imagine er Asst. C?def, Engineering Sec bion Research ana Technical Services Branch . 3 Results of Air Samples of February 196U Charlotte Works, H.K. Porter Company Operation Impinger______ Sample # mppcf Membrane Filter Fibers/cc Sample # Total 10 n + 'iber Preparation Blender Operator-BZ Person. Stock Packer-BZ Willow Operator-BZ Person. Stock Opening-Person. General Air - Seq. Seq. 55 215 232 235 567 237 569 33 211 18 20 22 2U 26 Uo U2 . UU- h6 hB 501 0.9 0.8 1.9 1.2 0.6 U.3 7.3 1.3 3.7 O.U 0.8 1.2 1.3 0.9 . 1.3 1.3 U.U 0.7 1.5 1.0 56 216 233 23U 568 50M 53 203 20U 206 236 570 3h 212 5U 202 2lU 201 19 21 23 25 27 :*29 Ul U3 U5 U7 U9 7.8 6.2 6.9 6.2 ' 15.9 5.U 7.8 8.3 10.6 11.0 20.9 68.6 160.3 1U.0 15.2 IlU .7 72.6 3.5 5.0 5.6 10.1 U.o 7.o U.o i5.o 23.8 17.9 3.8 10.1 1.1 3.1 3.1 0.7 5.8 l.U 1.1 0.5 3.U 1.2 6.3 9.6 Ul.U 1.2 5.U 17.5 17 .U 1.0 1.2 1.8 3.U 2.1 l.U 0.8 2.9 U.2 2.8 2.8 1.0 Notes on Abbreviations: "Person." refers to personal samples on membrane filters "BZ" refers to breathing zone samples by companion impinger & membrane filter "Seq." refers to unattended samples taken by a sequential sampler 4 Charlotte Works, H.K. Porter Co. Operation Impinger_____ Sample # Fiber Preparation (cont.) General Air-Seqi . (cont.) 227 228 mppcf O.U O.U 229 0.7 230 0.7 231 0.6 Seq. 553 0.8 55U 0.6 555 o.U 556 1.3 557 1.6 558 0.9 Carding Fixer - BZ Person. Uoi Uo5 U09 U13 10 529 5U8 . 730 0.2 o.5 1.3 0.7 1.6 1.9 1.3 0.9 Grinder - BZ 527 3.1 _______Membrane Filter Fibers/cc: Sample # Total 10 |i 221 5.9 0.7 222 2.6 o.U 223 8.0 0.7 22U 1.6 0.9 225 10.5 2.8 226 12.6 2.8 559 8.0 2.U 56o 6.3 2.8 561 15.9 3.9 562 U.8 1.3 563 6.5 1.U 56U 3.5 1.8 U03 7.1 1.0 U07 6.9 1.U Ull 5.5 1.1 105 1U.9 U.5 9 16.1 6.0 530 22.1 3.7 5U9 18.5 2.5 729 22.1 3.7 822 13 .k 3.1 823 11.7 3.2 828 11.3 3.7 829 12 .U 3.6 528 19.2 U.U Charlotte V/orks, H.K Porter Co. -5 Operation Carding (continued) Card Operator-BZ Person. Impinger Sample # mppcf 12 1.1 51 0.8 238 1.2 521 2.2 525 1.6 5U5 2.1 55o 3.1 U25 1.0 G.A. Rover Hauler-BZ Person. Lap Card Operator-BZ Person. General Air Seq. 3 52U 591 U23 U 7 17 106 109 116. 119 509 510 511 512 513 1.2 1.8 0.8 1.5 2.6 0.9 1.5 2.5 0.8 2.2 1.5 o.U 0.3 0.8 0.6 1.2 Membrane Filter Fibers/cc Sample // Total 10 n + 11 39.7 16.3 52 8.5 2.1 239 3.9 o.U 522 36.6 7.1 526 5U6 23.3 3U.7 u8..u1 551 39.1 8.1 U2U 19.1 2.9 103 19.9 U.7 107 16.8 3.6 108 12.2 U.7 502 15.6 2.9 503 36.8 7.U 5oU 2Ui9 8.9 505 28.9 10.2 531 21.9 7.3 532 Hi.? 2.9 5U7 16.2 3.6 1 38.3 8.8 523 16.8 U.3 592 3.8 2.6 218 12.9 U.2 U22 7.3 1.5 205 16.1 U.8 5 2U.0 8.0 6 16.1 1.8 lU U3.5 25.8 10U U9.3 18 ;i ill 11.8 U.9 liU 32.8 5.9 117 33.7 5.U 515 3.5 1.U 516 7.8 1.0 517 1U.U 5.6 518 15.1 1.U 519 8.U 3.2 6..- Charlotte Works, H. K. Porter Co. Operation Carding (continued) General Air (cont.) Seq. Amosite Carding Breathing Zone General Air Spinning Fixer - Person. Spinner Ring-BZ _______ Impinger______ Sample # mppcf _______ Membrane Filter Fibers/cc Sample # Total 10 + 51h 533 553U 535 536 5Ul U17 392 393 386 389 391 69 71 7k 62 8U 8831U 316 372 37k 380 382 585 595 625 1.0 520 1U.U 3.5 1.0 537 12.6 3.5 0.8 538 12.6 lull 0.2 539 17.0 3.2 0.5 5Uo 17.0 2.U 1.8 5U3 36.0 9.8 1.0 kl9 9.7 U.2 0.5 0.3 0.5 38k 12.5 3.5 0.3 0.6 390 16.5 9.2 820 6.3 2.9 826 2.2 1.7 0.3 68 3M 0.9 1.2 70 7.0 1.9 0.5 73 k.3 2.0 0.0 81 8.1 2.6 1.1 83 5.U 1.5 1.2 87 6.It 2.2 0.8 315 20.5 8.8 2.U 317 3.7 1.5 0.3 373 5.2 3.U 0.3 375 2.2 381 8.3 U.7 2.8 0.6 0.8 383 0.U 586 1.0 596 3.6 3.7 3.8 2.1 1.5 3.8 626 2.8 1.5 - 7 Charlotte Works, H. K. Porter Co. Operation Impinger Sample // Spinning (continued) Spinner Ring-BZ (cont.) Person. 630 638 639 mppcf 1.7 2.3 O'. 3 Doffer - BZ General Air Person. Seq. 593 61 66 328 336 370 57 301 302 1.6 O'. 7 0.0 0.3 0.2 0.8 0.9 1.0 0.9 Membrane Filter Fibers/cc Sample # Total 10 p. + 631 . 34 1.5 637 12.6 5.2 6U0 2.8 l.l 150 8.8 2.5 151 k.l 1.1 153 10.k 24 308 U.5 2.3 309 U.5 2.5 310 1.8 0.2 311 2.9 1.0 312 34 1.6 313 54 2.2 318 3.6 0.9 319 7.9 u.u 320 7.0 2.2 321 U.7 2.2 322 h.O 1.0 323 6.5 1.9 332 84 U.3 333 7.0 34 3U0 . 7.9 2.0 3U1 64 3.8 376 1.3 0.6 377 14 0.8 378 3.7 2.3 379 0.3 0.2 60U U.5 1.7 59U 3.5 24 813 9.2 U.3 59 9.9 5.2 6h 2.3 0.9 33k 3.8 0.9 368 7.9 2.1 30U 84 5.3 305 U.5 1.6 306 13.3 8.1 307 1.6 0.8 Charlotte Works, H. K. Porter Co. 8 Operation Spinning (continued) General Air (cont.) Seq. Twisting Fixer - Person. Twister - BZ _______ Impinger______ Sample if mppcf _______ Membrane Filter Fibers/cc Sample # Total 10 p + - 358 o.5 352 3.8 1.6 359 o.U 353 2.8 0.8 360 o.U 35U U.5 1.6 361 0.8 355 2.5 0.5 362 o.U 356 2.1 1.0 363 0.2 357 0.5 O.U 76 10.0 80 3.8 86 3.1 330 331 338 3U8 350 597 599 601 606- 608 623 628 632 635 653 728 739 2.U 9.U 3.3 3.0 U.2 2.U U.2 l.U 5.5 0.7 3.5 6.2 1.7 1.0 3.9 10.0 2.1 821 827 75 79 85 90 92 . 3.6 3.8 12.2 U.2 3.U 5.0 32.8 ' 0.8 0.9 7.U 2.2 1.1 1.3 9.2 339 3U9 351 598 600 607 609 62U 629 633 636 . 65U 727 737 738 9.1 1.8 6.6 7.8 lu..Uu O.U 2.9 1U.6 1.2 10.7 17.6 12.8 7.2 U.U 19.5 30.0 10.3 0.7 2.0 5.2 U.6 5.U 1.6 7.9 13.6 $.7 Charlotte Works, H. K. Porter Co. 9 Operation Impinger Twisting (continued) Twister Person. Sample # mppcf General Air Gen. Air Seq. Seq. 82k 3k6 573 57ii 575 576 577 578 6l6 617 6l8 619 620 621 2.0 2.3 O.li 0.6 0.8 0.5 o.5 0.7 o.li O.li O.li 0.8 o.5 0.6 Membrane Filter Sample # Fibers/cc Total 10 \i + 152 U.9 1.7 l5ii 15.0 6.9 3li2 1.0 0,6 3U3 5.9 1.8 365 li.6 2.5 603 2.5 0.8 622 5.6 3.5 627 8.6 2.9 631i 6.3 3.7 3lili 5.0 1.8 579 7.3 580 13.0 mm 581 582 7.0 2.8 583 3.6 2.3 581i 5.0 3.5 610 1.2 0.5 611 3.8 1.2 612 6.U 2.3 613 U.5 l.li 6lli 0.8 O.li 615 0.1 0.0 10 - Charlotte Works, H. K. Porter Co. Operation Twisting (continued) General Air (cont.) Seq. Winding Winder - BZ Person. 'Weaver 'Weaver Cloth-EZ Impinger______________ Sample // mppcf Sample # Membrane Filter Fibers/cc Total 10 p, + 6Ul 0.3 6U2 0.5 6U3 0.9 6UU 0.6 6U5 0.7 6U6 0.7 78 1.2 589 1.7 716 0.2 721 0.8 97 98 100 2U1 2UU 253 257 ' 399 658 705 707 709 712 801 0.2 0.5 0.7 o.U 0.6 0.6 0.3 0.3 O.U 0.3 0.3 0.6 1.0 o.U 6U7 6U8 6U9 650 651 652 77 590 717 722 36U 366 367 9U 96 99 101 2U2 2U3 252 256 398 659 70U 706 708 802 10.5 10.5 3.8 8.0 5.2 U.2 6.0 U.2 2.1 U.6 2.8 2.1 5.7 2.9 7.9 1.0 2.1 0.6 2.8 1.1 6.0 3.7 U.5 1.3 6.6 0.8 6.2 1.5 6.7 11.8 3.2 12.2 12 .U 6.2 U2.7 7.8 2.7 5.1 U.2 3.7 2.9 0.7 l.U 5.0 0.7 5.6 5.6 1.5 16.2 U.O 1.3 2.5 3.1 1.0 11 Charlotte Works, H. K. Porter Co. Operation '.leaving (continued) Vie aver Cloth (cont.) Person. _______ Impinger Sample # mppcf Weaver Tape-3Z Person. 169 171 173 175 388 656 663 715 0.9 O.U 0.3 o.U 0.2 2.8 0.5 0.9 Fixer - Person. Creeler - BZ Person. 661 Warper & Beam-BZ Person. Winder-C & Q --BZ Persoonn. 6591 719 25U 711 0.2 0.3 1.5 0.3 0.7 _______ Membrane Filter Fibers/cc Sample # Total 10 n + 2U0 2U7 251 397 168 170 172 17U 657 66U 71U 155 156 157 160 161 162 16U 166 396 812 819 825 662 159 163 395 660 718 39U 255 710 165 2U5 2.5 l.U 10.3 8.0 15.8 6.9 2.5 1.1 0.9 2.5 U.9 3.U 6.U 1.5 0.6 0.6 33.2 3.6 15.1 9.5 7.7 3.U 2.7 U.l 1.8 2.7 2.2 5.2 11.1 1.1 U.9 0.3 1.5 0.5 1.7 0.6 0.8 0.9 1.1 1.5 15.U U.U 5.8 U.5 0.8 3.2 1.3 0.2 2.5 0.7 2.2 0.2 9.3 2.7 0.6 12.9 9.5 0.18 5.6 U.8 U.l 1.6 6.5 2.5 U.l 1.2 6.U U.8 ty -12Charlotte Works, H. K. Porter Co. Operation Weaving (continued) Yarn Hauler--Person. Impinger______ Sample # mppcf 167 Hope, Wick, Braid & Cord Slubber Operator-BZ Person. Former Rope & Wick-BZ Person. 220 37 571 0.9 0.7 0.6 Winder, Rope, Cord 'Hick - BZ Person. Finishing Inspector - Person. U21 1*27 1.5 1.1 Gen. Air Treatment & Finishing-BZ Person. Gen. Ail* 808 817 810 726 Calender-Gen. Air 721* Miscellaneous Gen. Maintenance-BZ Janitor - BZ Person. 207 703 Ventilation 732 73k 0.1 0.1 0.1 0.2 0.2 i*.3 1.8 0.6 0.0 Membrane Filter Fibers/cc ' Sample # Total 10 p, + 167 l*.l* 1.3 811* 10.7 3.2 219 217 36 572 210 U21A 39 1*26 213 9.1 ll*.6 8.7 UU.6 8.7 U.l 172.5 13.0 9.1 2.3 3.5 1.2 6.9 2.3 2.3 25.2 6.5 3.1 803 1.2 0.5 80l* 0.3 0.1 805 1.8 0.8 806 3.1 0.9 807 1.2 0.8 809 0.7 0.0 818 1.2 0.2 811 28.7 9.1* 816 0.6 0.5 725 2.1 0.7 723 3.0 1.3 209 9.8 2.6 702 11.5 3.9 103 19.9 U.7 731 1.0 0.7 733 2.5 0.0