Document N22LR2XoowEm5X4oVM3B1q3Ep

Interoffice AVeiiionuuliiin PMpmm immiidH ^ GEN SS (REV.6/7 to (N*m n<l Location) .. J. E. Rodriguez FROM ,NTM.n<Loeg,onfc> Robinson cc witn attachments: *illfl wLLnJlCvL " DATE March 14, 1984 REFERENCE NO. GCR-23-84 cc without attacl iments: B. J. Chodkiewicz - C. W. Johnson W. G. Cornman C. W. Whaley Process File: 31.C Central Files (2)-----------------CCCTC K. A. Dunn C. R. Pennington W. T. McNair -- CCCTC D. R. Johnson N. V. Smith I PLAINTIFFS EXHIBIT * CEL-105. SUBJECT: Dust Problem in the SFA Catalyst Area SUMMARY A dust problem has been identified in the catalyst mixing area of the Synthetic Fatty Acids (SFA) Unit. (1) The dust collection for the oxalic acid hopper is inadequate and there is no dust collection for the copper and manganese acetate hopper. Dust collection for these two hoppers can be provided by using the existing triphenylphosphine (TPP) dust collector. DISCUSSION There is a dust problem when mixing oxalic acid and copper and manganese acetate in the SFA Unit. The initial design of the SFA Unit called for dust collection on the oxalic acid hood. The dust collector used for oxalic acid is an American Fan Model DC-10 mounted on a 55 gallon drum. This collector moves about.half the volume of air required for adequate dust collection. This problem is further exacerbated by the fact that the oxalic acid solidifies and operators have to break it up by beating on the containers and smashing the chunks that are trapped on the hopper grating. The dust collection on the oxalic acid hopper could be improved by in stalling a new nozzle on the hood (M-1572) and tying it in to the TPP Dust Collector (M-1654). The hood on the oxalic acid hopper is open and measures 3 ft x 3 ft. This open area should be minimized to provide maximum air velocity at the hood. This could be accomplished by using doors similar to those on the TPP hood (M-1549). Figure I illustrates recommended nozzle and hood design. (2) UNITERMS: Manganese Acetate Industrial Hygiene SFA TPP Dust Copper Acetate 005056 GCR-23-84 Page 2 The copper and manganese acetate hopper (M-L573) does not have any dust collection on it at this time. A hood should be fabricated for this hopper along with a nozzle to tie in to the TPP dust collector (M-1654). Refer to Figure 1 for details. The copper acetate also solidifies into chunks that have to be broken up to get out of the drum and through the grate. The personnel exposure problem is worsened by the poor reliability of the V-1037 mixer (M-1481). Failure of this mixer forces the operators to use recirculation to mix the catalyst. This leads to excessive turbu lence in the vessel and more acid fumes in the area. The TPP dust collector is made by American Air Filter in Louisville, Ky. It is an Arrestall #1600 and is designed to move 1600 cfm of air at a fan static pressure of 7 inches of water gauge. Appendix I contains a perfor mance curve for the Arrestall #1600 and pressure drop calculations for the proposed modifications. The TPP dust collector is adequately sized to handle the dust collection off of any single catalyst mix hopper. It will not collect the dust effectively from more than one hopper at a time. All of the duct work, hood and doors required to tie in the hoppers to the TPP dust collector should be fabricated of stainless steel. The duct work layout should be designed to produce the minimum pressure drop using 8 inch diameter round duct. Three slide type dampers will be needed to isolate each hopper from the other. Figure 2 illustrates some types of dampers recommended for this service. The proposed modifications for dust collection in the catalyst area are depicted in Figure 3. An alternative to hard piping the dust collector to each hood would be to have a quick connect on the back of each hood so that the operator could hook up a dust collection hose to the appropriate hood. This alternative would save some money in damper costs but it would be more difficult to work with for operators. SAFETY/RELIABILITY From a reactivity and material of construction point of view there is not a problem with collecting the copper acetate, manganese acetate, oxalic acid, and TPP dust in the same vessel. (3) The TPP dust collector (M-1654) is lined with 3-5 mils of epoxy. The addition of copper acetate, manganese acetate, and oxalic acid to the TPP dust collector does not pose any safety problems. A potential dust explosion p-rnMm vaa uncovered in the investigation. Copper and manganese acetate and oxalic acid do not represent a pnfpntMal dust explosion hazard.__ However. TPP does cause a slight explosion hazard when exposed to oppn f|ame. There are "three li'r dust collectors at BCP (BuOH, PrOH, SFA). None of these collectors are explosion vented. No data could be found on dust explosion severity of TPP. The dust explosion severity of TPP could be determined by an outside firm such as Hazards Research Corporation in Rockaway, N. J. The study and sizing of the explosion vent would cost about $2000. (4) The study may indicate that explosion venting is not needed. 005057 GCR-23-84 Page 3 CONCLUSION/RECOMMENDATIONS I recommend the following action plan to address the dust problem in the SFA catalyst mix area: 1. Issue an Engineering Work Order to tie in the Oxalic Acid Tank Hopper (M-1484) and the copper and Manganese Acetate Hopper (M-1573) to the TPP Dust Collector (M-1654). 2. Request Maintenance and/or Plant Engineering to investigate the operation of the mixer on V-1037 (M-1481) so that its reliability can be improved. The objective should be to avoid using recirculation to mix the Laso catalyst. 3. Request Purchasing to find a supplier for free-flowing oxalic acid and copper acetate. This aspect of the problem is similar to prob lems experienced with potassium acetate in the VA Unit. 4. If the above items fail to correct the dust problem, then closing in the catalyst area should be considered. This would reduce the air turbulence created by wind and improve dust collection. Attachments bq References: 1. Johnson, Don R., Error Cause Removal #15, January 20, 1984. 2. Industrial Ventilation, by American Conference of Government Indus trial Hygienists, 1979. 3. Personal communication with T. N. Moody and H. R. Horton, February, 1984. 4. Phone conversation with George Petino of Hazards Research Corpo ration, Rockaway, N.J. (201-627-4560), March 9, 1984. 005058 Duct velocity - 3500fpm minimum Q -150 cfm/sq ft face Entry toss - 0.25 VP MANUAL LOADING AMERICAN CONFERENCE OF GOVERNMENTAL INDUSTRIAL HYGIENISTS BIN a HOPPER VENTILATION date i-72 | VS-304' FIGURE 1: DUST COLLECTION HOOD DESIGN 005059 8-4 INDUSTRIAL VENTILATION AMERICAN CONFERENCE OF GOVERNMENTAL INDUSTRIAL HYGIENISTS FIXED DAMPERS DATE 8-9-55 FIGURE 2: RECOMMITTED DAMPERS I Fig. 8-2 005060 8C-22-4 Nome moi vl-i Eu jc<V <a CEIANESE CHEMICAt COMPANY i ;irr ru.nr u o 0o) T FIGURE 3: PROPOSED DUST COLLECTION FOR SFA CATALYST AREA CL, '' aH. CM tm" *<Oh-( -*raM l X oaX <o 0) <ou Cl < r* CQ dJ tn I W <U 1 X <u c c. aj C. oo oc O J taa X Vi o aoocuc. 005061 APPENDIX I PRESSURE DROP CALCULATIONS FOR MODIFICATIONS TO TPP DUST COLLECTOR (M-1654) NOTE: The pressure drop calculation.is from the furthest hopper (M-1573) to the dust collector. See Figure 3. Calculation of Required Air Volume Open face area at hood * 3 ft x 3 ft = 9 ft2 From Figure 1 the required air volume is: Q ** 150 cfm ft2 or: 150 cfm x 9 ft2 = 1350 cfm ft2 Calculation of Duct Diameter From Figure l the recommended duct velocity * 3500 fpm Duct cross sectional area 1350 cfm 3500 fpm 0.3857 ft* 0.3857 ft* falls between an 8" and 8%" diameter duct. See Figure 6-18. Using 8" diameter: 1350 cfm 0.3491 ft2 3867 fpm Calculation of Hood Entry Loss From Figure 1 entry loss 0.25 VP From Figure 6 - 16, for 3867 fpm; VP * 0.93 (1 + Entry Loss) VP * 1.25 x 0.93 * 1.16 inches Hood Suction = -1.16 inches 005062 Pressure Drop From Hood to Collector 28 ft of 8" diameter duct = 28 ft 3 long radius ells (2.0 D); 3 x 10 = 30 ft Total Equivalent Length 58 ft From Figure 6 - 15A - for 3800 fpm and 1350 cfm: Friction Loss 2.6 inches 100 ft 58 ft 100 ft X 2.6 1.51 inches Pressure Drop Across Collector From Figure 4. The pressure drop across the cartridges ranges from 1 3 inches water gauge. Use an average of 2. -2.00 inches The preceding pressure drops are on the suction side of the fan. The following are on the discharge side. Entry Loss From Collector to Exhaust From Figure 6 - 10; entry loss for flanged duct end From Figure 6 - 18, duct velocity 10" diameter: 1350 cfm 0.5454 2475 fpm 0.49 VP From Figure 6 - 16 VP for 2475 fpm * 0.38 (1 + Entry Loss) VP 1.49 x 0.38 * 0.57 inches Pressure Drop From Collector to Exhaust 11 ft of 10" diameter duct (1) 10" ell 1 x 20 - 11 ft - 20 ft Total Equivalent Length 31 ft From Figure 6 - 15A - for 2475 fpm and 1350 cfm: Friction Loss 0.9 inches 100 ft 005063 31 ft x 0.9 = 0.30 Inches 100 ft Fan SP = SPout - SPi.n - VP in = (0.57 + 0.30) - (-1.16 - 1.51 - 2.00) - 0.93 = 0.87 + 4.67 - 0.93 Required Fan SP = 4.67 inches at 1350 cfm Available Fan SP * 7 inches at 1600 cfm (from Figure 4) 005064 rC *5 <00 00 1200 -1600 2000 2<00 2600 "?iz- r\y^rr-''::~; NOTES: ^ ` -'rr.r.rAm delivery in cubic feet per minute -Ss^i.-aVfir^-. - PLENUM SILENCER REQUIRES Vt' W.Q. STATIC PRESSURE. > a. CONDITIONED CARTRIOGEISi REQUIRE 1* WEI. STATIC PRESS! '------------------------------------- *----- *-------------- 3200 3600 <000 BIN VENT ARRESTALL Standard features of the Bin Vent include: 1. Weatherproofing with plenum silencer and weatherhood. 2. Totally enclosed fan and motor. 3. Easy access door for fan and motor servicing. 4. TEFC shaker mechanism motor. L 5. NEMA 4 controls. 005065 26 Ift- k.*0.JV* PLAIN DUCT ENO V on 3 h*o.jo r OIRECT BRANCH BOOTH c, . INDUSTRIAL VENTILATION 13- ti** o..v FLANGED OUCT ENO c,ot 33- h, i T# v# o***Ct SHARP-EDGED ORIFICE C,0 $0 N t) V# oucr,in< OUCT VTLOOTY t SLOT VtlOCITYt CTTW Lf* VF <MtfVC 0.0 VP OUCT ORIFICE PLUS FLANGEO OUCT (MANY SCOT TYftSI < O.SS (WHCff OUCT VCL0C1TT SCOT VCCOCITY ) /--A" 0/Y 3- k O.OOVf TO O.IOVA BOOTH PLUS ROUNOEO ENTRANCE C. O.ST L1 u* 00U8LE (mmm comci HOOO C,<O.N(mI l-c` TAPERED HOOOS * SWUSSCSt MM. SOUK KCTUttUUU IS DC MAJOR JUSU m RtCTJUMVUUI MOSS. m>hHOOD ENTRY LOSS Fig* e-10 Q - 400$ AC V3F rfc - ENTRT LOSS FACTOR vf velocity pressure w duct 3P STATIC PRESSURE AT THROAT. INCHES WATER CAGE ENTRY LOSS. INCHES WATER GAGE Q Am VOLUME, CrM A CROSS SECTION AT THROAT. SQUARE FEET C# COEFFICIENT OF ENTRY ENTRY LOSS FOR COMPLICATED HOOO SKAFES: 1. BREAK HOOO INTO SIMPLE COMPONENTS 2. CALCULATE fc FOR EACH COMPONENT 3. ADO VALUES OF h* MISCELLANEOUS VALUES HOOO ENTRY LOSS. Ffc ABRASIVE BLAST CHAMBER ABRASIVE BLAST ELEVATOR ABRASIVE SEPARATOR ELEVATORS (ENCLOSURES) FLANGED PIPE PLUS CLOSED ELBOW PLAIN PIPE PLUS CLOSE ELBOW TUMBLING MILLS (VARIES WITH DESIGN OF MILL) 1.0 2.3 2.3 04$ 04 140 AV. 2.0 005066 I DESIGN PROCEDURE 6-27 EQUIVALENT RESISTANCE IN FEET OF STRAIGHT PIPE See Fig. 6-24 *'' HI * If." W .'If i t f r U U -*!<'* H<* * * * ^ ' ' Pipe Ur\ 3" 4" 5" 6* 90Elbow * Centerline Radius 1.5 D 200 250 5 33 6 44 9 65 !2 7 6 Angie of Entry 30* 45 23 35 46 57 H, NO of Diameters i D .75 0 22 23 24 35 .5 0 9 12 16 20 7" 13 97 8" 15 iO 8 to" 20 14 11 12" 25 17 14 14" 30 21 !7 16" 36 24 20 18" 4i 28 23 20" 46 32 26 24" 57 40 32 30* 74 5t 41 36m 93 64 52 6 7 9 H 13 16 18 20 9 3 6 23 It *. 7 26 14 5 9 36 17 6 a 44 2/ 7 !3 53 25 9 15 62 28 10 18 71 32 a 20 80 13 24 92 17 31 126 22 39 159 40" t05 48" 130 72 59 89 73 *For 60 elbows-- 0.67x loss for 90 45 elbows-----0.5 x loss for 90 30 elbows-- 0.33xloss for 90 AMERICAN CONFERENCE OF GOVERNMENTAL INDUSTRIAL HYGIENISTS DUCT DESIGN DATA "date 1-76 | Fig. 6-11 005067 DESIGN PROCEDURE 6-31 -1 Fig. 6-15A Mate: 8oth "1.9" and "1.22" ar exponents. 005068 DESIGN PROCEDURE 6-33 VELOCITY PRESSURES FOR DIFFERENT VELOCITIES - STANDARD AIR FROM: V = 4005 VvF V = VELOCITY FPM VP = VELOCITY PRESSURE,INCHES OF WATER VP V O.OI 0.02 0.03 0.04 O.OS 0.06 0.07 0.08 0.09 0.10 0.11 0.12 0.13 0.14 0.1 S 0.16 0.t7 0.18 0.19 0.20 0.21 0.22 0.23 0.24 0.2S 0.26 0.27 0.28 0.29 0.30 0.31 0.32 0.33 0.34 0.3S 0.36 0.37 0.38 0.39 0.40 0.41 0.42 0.43 0.44 0.4S 0.46 0.47 0.48 0.49 O.SO 0.51 400 556 694 801 896 981 1060 1133 1201 1266 1328 1387 1444 1498 1551 1602 1651 1699 1746 1791 1835 1879 1921 1962 2003 2042 2081 2119 2157 2193 2230 2260 2301 2335 2369 2403 2436 2469 2501 2533 2563 2595 2626 2656 2687 2716 2746 2775 2804 2832 2860 VP V 0.52 0.53 0.54 0.55 0.56 0.57 0.58 0.59 0.60 0.61 0.62 0.63 0.64 0.65 0.66 0.67 0.68 0.69 0.70 0.71 0.72 0.73 0.74 0.75 0.76 0.77 0.78 0.79 0.80 0.81 0.82 ' 0.83 0.84 0.85 0.86 0.87 0.88 0.89 0.90 0.91 0.92 0.93 0.94 0.95 0.96 0.97 0.98 0.99 1.00 1.01 1.02 2888 2916 2943 2970 2997 3024 3050 3076 3102 3127 3153 3179 3204 3229 3254 3279 3303 3327 33S1 3375 3398 3422 3445 3468 3491 3514 3537 3560 3582 3604 3625 3657 3669 3690 3709 3729 3758 3779 3800 3821 3842 3863 3884 3904 3924 394S 3965 3985 4005 4025 404S VP V VP 1.03 1.04 1.05 1.06 1.07 4064 4084 4103 4123 4142 1.54 1.55 1.56 1.57 1.58 1.08 1.09 1.10 1.11 1.12 4162 4181 4200 4219 4238 1.59 1.60 1.61 1.62 1.63 1.13 1.14 1.1S 1.16 1.17 4257 4276 4295 4314 4332 1.64 1.65 1.66 1.67 1.68 1.18 1.19 1.20 1.21 1.22 4350 4368 4386 4405 4423 1.69 1.70 1.71 1.72 1.73 1.23 1.24 1.2S 1.26 1.27 4442 4460 4478 4495 ` 4513 1.74 1.75 1.76 1.77 1.78 1.28 1.29 1.30 * 1.31 1.32 4531 4549 4566 4583 4601 1.79 1.80 1.81 1.82 1.83 1.33 1.34 1.35 1.36 1.37 4619 4636 4653 4671 4688 1.84 1.85 1.86 1.87 1.88 1.38 1.39 1.40 1.41 1.42 4705 4722 4739 47S6 4773 1.89 1.90 1.91 1.92 1.93 1.43 1.44 1.4S 1.46 1.47 4790 4806 4823 4840 4856 1.94 1.9S 1.96 1.97 1.98 1.48 1.49 1.50 1.51 1.52 1.53 4873 4889 4905 4921 4938 4954 1.99 2.00 2.01 2.02 2.03 2.04 Fig. 6-16 V VP 4970 4986 5002 5018 5034 2.05 2.06 2.07 2.08 2.09 5050 5066 5082 5098 5114 2.10 2.11 2.12 2.13 2.14 5129 5144 5160 5175 5191 2.15 2.16 2.17 2.18 2.19 5206 5222 5237 5253 5268 2.20 2.21 2.22 2.23 2.24 5283 5298 5313 5328 5343 2.25 2.26 2.27 2.28 2.29 S3S9 5374 5388 5403 5418 2.30 2.31 2.32 2.33 2.34 5433 5447 5462 5477 5491 5506 5521 5535 5550 5564 2.3S 2.36 2.37 2.38 2.39 2.40 2.41 2.42 2.43 2.44 5579 5593 5608 5623 5637 2.45 2.46 2.47 2.48 2.49 5651 5664 5678 5692 5706 5720 - 2.50 2.60 2.70 2.80 2.90 3.00 V 5734 5748 5762 5776 5790 5804 5817 5831 S84S S8S9 5872 5886 5899 5913 5927 5940 5954 5967 5981 5994 6008 6021 6034 6047 6061 6074 6087 6100 6113 6128 6140 6153 6166 6179 6192 620S 6217 6230 6243 6256 6269 6282 6294 6307 6320 6332 64S8 6581 6702 6820 6937 VP V 3.10 3.20 3.30 3.40 3.50 3.60 3.70 3.80 . 3.90 4.00 4.10 4.20 4.30 4.40 4.50 4.60 4.70 4.80 4.90 5.00 5.10 5.20 5.30 5.40 5.50 S.60 5.70 S.80 5.90 6.00 6.10 6.20 6.30 6.40 6.50 6.60 6.70 6.80 6.90 7.00 7.50 8.00 8.50 9.00 9.50 10.00 11.00 12.00 13.00 13.61 14.00 7051 7164 7275 7385 7492 7599 7704 7807 7909 8010 8109 8208 8305 8401 8496 8590 8683 8774. 8865 8955 9044 9133 9220 9307 9392 9477 9562 9645 9728 9810 9891 9972 10052 10132 10210 10289 10366 10444 10520 10596 10968 11328 11676 12015 12344 12665 13283 13874 14440 14775 14986 005069 DESIGN PROCEDURE 6-3S ASIA AND CISC0MFEBENC2 OF CIRCLES Dias. Is Inches A1TF.Ji X CIRCUMFERENCE Square Square Inchea Teat Inches Feet Liao* la Inches Ami Square Square Inchee Feet i 7854 1.767 z 3.1^ 2i 4.910 3 . 7.07 3i 9-620 4 12-57 1 15.90 5' 19.63 5j 23.76 .0054 .0123 .0218 .0341 .0491 .0668 .0873 .1105 .1364 .1650 3.1416 4.712 6.28 7.854 9.42 11.00 12.57 14.14 15.71 17.28 .2618 .3927 5236 .6544 .7854 .9164 1.047 1.178 1.309 1.439 30 31 32 33 34 35 36 37 38 39 706.8 754.7 804.2 855-3 907.9 962.1 1017.8 1075.2 1134.1 1194.5 4.909 5.241 5.585 5.940 6.305 6.611 7.069 7.467 7-876 8.296 Inches Feet 94.25 97.39 100.5 103.7 106.8 109.9 113.1 116.2 119.4 122.5 7.854 8.116 8.376 8.639 8.901 9.163 9.425 9.686 9.948 10.21 6 7 7i 8| 8* 9 10 11 28.27 33.18 38.48 44.18 50.27 56.75 63.62 70.68 78.54 95.03 .1964 .'2305 .2673 .3068 .3491 .3940.4418 .4923 .5454 | .6600 18.85 20.42 21.99 23.56 25.13 26.70 28.27 29.85 31.42 34.56 1.571 1.702 1.833 1.964 2.094 2.225 2.356. 2.487 2.618 2.880 40 41 42 43 44 45 46 47 48 49 1256.6 1320.2 1385.4 1452.2 1520.5 1590.4 1661.9 1734.9 1809.5 I885.7 . 8.727 9.168 9.621 10.08 10.56 11.04 11.54 12.05 12.57 13.10 125.7 128.8 131.9 135.1 138.2 141.4 144.5 147.6 150.8 153.9 10.47 . 10.73 10.99 11.26 11.52 11.78 12.04 12.30 12.57 12.83 12 113.1 13 132.7 14 153.9 15 176.7 16 201.0 17 226.9 18 254.4 19 283-5 20 314.1 21 346.3 .7854 37.70 .9218 ! 40.84 1.069 1.22? 43.98 47.12 1.396 50.26 1.576 53.41 1.76? 56.55 1.969 2.182 2.405 59.69 62.83 65-97 3.142 3.403 3.665 3.927 4.189 4.451 4.712 4.974 5.236 5.498 50 51 52 53 54 56 58 60 62 64 1963.5 2042 2124 2206 2290 2463 2642 2827 3019 3217 13.64 14.19 14.75 15.32 15.90 17.10 18.35 19.63 20.97 22.34 157.1 160.2 163.4 166.5 169.6 175.9 182.2 188.5 194.8 201.1 13-09 13.35 13.61 13.88 14.14 14.66 15.18 15.71 16.33 16.76 -------- ---- - 22 380.1 23 415.4 24 452.3 25 490.8 26 530.9 27 572.5 28 615.7 29 660.5 2.640 2.885 3.142 3.409 3-687 3.976 4.276 4.587 69.11 5-760 66 3421 72.26 6.021 68 3632 75.40 6.283 70 3848 78.54 6.545 72 4072 81.68 6.807 74 4301 84.82 7.069 76 4536 87.96 7.330 78 4778 91.11 7.592 80 5027 23.76 25.22 26.73 28.27 29.8? 31.50 33.I8 34.91 207.3 213.6 219.9 226.2 232.5 238.8 245.0 251.3 17.28 17.80 18.33 18.85 19.37 19.90 20.42 20.94 Fig. 6-18 005070 > wiiirtl far ttot. BMticUQB.ot tin o^lspos,, A program . aanufacturlng, it would b desirable to know the Best con centrations where tin asbestos is duaped from bege late the. pulp slurry. Concentrations should also ho determined where dusting oeours la finishing products. While Initial dust determinations should he aade at frequent intervals, once the level has been established as satisfactory, the frequency aay be extended to occasional tests to assure continuation of a satisfactory condition. fre-employment sad periodic physios! examination of workers are desirable. These should inelude chest x-rays to insure that the worker has ae chest condition prior te work with asbestos and to detfralne that as lung changes are resulting from work with asbestos. St is believed that the addition of asbeotoo at the proposed levels during the manufacture; ofpaper products would bo haraless to the ooaaunor. fetal dusting would 004430 biT to bo wU in axcaaa of any lavala aeeoptablo to tba co&auaar for tho aaboatoa concantyatloca to approach tba Thraahold Liait Yaluo. In coocluaien* whil aaboatoa duat ia axcaaa of tho Thraahold llait Yaluo la potaatlally harnful, aa aro aaay othar duata encountered la lnduatry, it la aa readily eoatrollad aa othar auoh duata aad It can bo uaod aafaly with appropriate procautlona. 004431 -37- 0* 8f lolikoff aald occa that tha iacidaaca or tha occuamc* of tha eaaear ia tha noa-aaokara ia axtraaaly low -- la that eorraet --aLaoat noa* ariataut. Loaf enoarai othar caaotra aot tanting eat to bo domat apparently with aaokara and aoc-aaokara. 0. Z would lllca to aak thla of Dr. Sallkoff. aa Dr. larriaa alao did, .. aa to whathar thara ara any iadleatiooa of hyparaaaoaptiblllty or auaoaptlbllity to aaaothaliooa. Ara tha paopla at apaolal riak? fhla waa la year laat alida. X think that Dr. larriaa la on to aoaothlag. I think ha'a fot a aaaaa of aemthlag. Da had ona aabaatoa woxkar ia Z>oeal 32 la Mwark, a an ate daaalopod a loft plaoral aaaothallona nd dlod* la eaa late tha trada la lt2l. l&a brothar, thraa yaara yoonger oaaa into tha trada ia 1131. thin la a fathoraan*brotborbrothar onion. SOa can't got late thla oaioa. daughter). la ona lato tha trada thzaa yaara la 1*31 rathar thaa 1S2S. la dlod thraa yaara labor of a loft plaoral aaanthalli--. lo wortad la tho oaaa ooodltloaa and Dr. aory talla aa that ha cannot toll tho logical aoetiooa apart, thoy look idntloal. lo that thorn ia aov aowa aoapieioo on tha baaia of thoao clinical lapraaaloaa that thorn nay bo aoao aoaoaptlhility factor, latoxa ia trying to toll aa aonthlay. la ara too daaao no far to find oat. ***?.D 3S- Q. Z wm going to ask you a queatioa oo tho aprayiag o ahntoe. Hoot of tho foamlatlooa that contain aabaatoa an f to ISt aabaatoa tfaar an aprayed by aad large nay eltiaa and atataa bate banned tho spraying of aabaatoa. Q tho othor hood * thoy eubetltute synthetic fibers that ooaootlally have tho aan foaolatioo aad that glees ua son ooooara. V Lot n enlarge oo tho father-daughter, father-eon syndrom la union. Perhaps tho aoleoa will now wish to oithor ban thoir daughters taka oathoai jda or olao gin it to anatiniy olao'a klda. the flrat breakthrough X'ee aoao ban obon tho unioo fathora nay aot brlag thoir klda into tho union. Doetora do thia also* Stay with m aad ao oqual rights don't got owltod. Za/oiaouaaioo bon I rooaotly poiatod out that a unico na raxoly oaor briaga thoir daoghtora late tho unioe* but om aooo a groat May aooa. So oqual opportunity haaa't coolly brokn through* bat porhapo with anoolto and tbaoo thinga in tho picture, they nay choooo to nix* are than quaatiOM of tho speaker? Q. fir* --rrioo, Z had tho privilege of noting with you tin other day* and would you elaborate on teat change . pcooadun. Zf Z followed you oorxectly* and oomot n if Z*n wrong* tea worker oon into tea lookar coon ana. Sa renewed all thaao garnanta inolodlng hie ndecgamnta and placed than in a lodter. so wm iaauod other gaxnaota to pot on* including tea ooeoralls aad tea aafoty paraphernalia. 004425 IOMW.D .-40- alvqr* dona, And what wa talkad about is bnaklng that chain and that'* what you'ra talking about, of ooorsa, isn't it? An than guaatlona back than? 0* X would lika to know. Dr. Barrlaa, If tha pictuna that you shewwuat han baao for a grip out of tha aatarlal aad bagging, traaaportiag aad diapoaiag of it and so on. Aad you alao iadieatad that tha -- ft whila poo wan waitiag for aa X loot *r train of thooght. Anyway, I'll gat to point han. Do you raquin any typo of mapintozy or psotaotiva elothing protaetioa for iaatallatioo of noa-aabaatoa notarial? A. Too, tha anawar la yaa. Ha an not abaolutaly oartain that tha nainly oaldtaa ailieata typa of notarial wa an now ualng is going to ba aafa in tha long tan. Tbanfon, wa provida a dust raapirator and uausally a brina nylon owarall for work oalng thaaa aatarials and tha raapirator is optional, . if tha dust oonpaatrstion is lass than S ailUgrana par Ohio aatar. 1st you try to nabs it obligatory whan it is about ftwo nilliastan par oftte aatar and thia naans that it is obligatory during all rip-out proosduns. Thank you. Ha an now ispooing on tbs asst ants of apsakan.Ubuld winn. 004426 ioong.D r - * went to the job site. Bo- aeooapllsbod hi* job and at tha and of the shift ha raaosed all thaaa garasnts and laft than ia tha change roon la a elaaa toon ataosphere, bewared, piekad op his gaxaants and want on bona, and when ha caae'badt all tha garasnts that ha wore tha day hafota were laondered and pat late tha raeaptloal for aaa tha following day. O.X. Z want to ba aara of that, becaoae Z think that it paxoonally aa far aa Z'a eonoaraad * a atap abaad. Too had oaa qwaeticn, Doctor, I weald lika to oosnaot on that yea waraa*t gaita aara aboat tha eoarca of aabaatoa that that banker had. Oaa of rj eolleagaae aaggoatad that ha night hawa bean aeoolightiag and that nay ba year eourea of mawar and Z woald alao Ilka to eeonnat on tha fattaroea baa and to lay aside a leaned oollaagaa aboat tha daefbter. Z had two daaghtara. they didn't got ia tha baaiaaaa bat they narriad two yooag aaa that did gat into tha baaiaaaa. to it'a all ia tha faaily. Of ooene, it is, and of eoaraa, this ia tha braakthroogh tha ehaia. aban yoa aako than laaadar tha ataff at weak, fba littla lady wbooe X-rays on w d-ak at tha offtania the wife of tha gay that ra a baaiaaaa for 4$ yean. Ba died of a waxy pacallar eaaoar which the pathologists ooalda't gaita classify throe years ago. tha'a get all this claaaic ataff which yoa'wa boon showing aa the last 24 boors, tad aha Baser wont near tha dana plant, bet ahe'd bean laondariag bar staff# as a good hoeaswifa ' 004427 ioogoo.D i It haa been known for yeara that bom pereona working la aBbtstot production wort proat to develop a disabling lunc dleeaae. la tlae, thla ooadltlon beoaae kaown aa aabaatoala and waa related to espoaure to high conceatratloaa of aabeatoa duet. With further exparlmce, it waa found that an could work with aabeatoe without developMat of luag dlaeaae If duat concentratlona ware kept below a certain level. It haa beta generally accepted that a worker will not develop aabeatoala if he la expoaed to no acre than 5 Billion partition per cubic foot of air, even if thla expoaure eon* tlauea for hla entire working llfetlao. Although no eaaee of aabeatoala are Imowa to have/oeeurred when axpoeurea-have been aalatalaed at or below thla level, the AQSX8 (which aeta indicated they intend to lower the TOT for aabeatoe to 2 Billion partlclea per cubic foot la an effort to laoraaae the eafety factor incorporated la the Halt. She V. t. Departaoat of labor haa already lamed a regulation under the Kalab-leelr Act placing the Wt for aabeatoa at 8 partlclea per ottblr foot for public eontracta la which they have Jurladletloa. Thla concentration of duat la generally not vialble la the average work area unloaa a 004428 10MS4.D r -2 baaa of light causing Tyndall affoet la present. Usually the dust concentration sust to from 8-10 alllion particles par cuibc foot (NPFCf) before Its presence it visible in average lighting conditions. . Savaral years ago, it was reported that there tas an Ineraasa In tha lacldanea of cancerous ttaers* aapaolally of tha lung* assoolatad with aahastoola. Kaosotly there hava boon raports of soaa oaaeara oocurrlng la ladlrlduals exposed to asbastoa dust, but who hava not davalopad clinical asbestosIs. Zt la ballavad by aoat authorities that thaaa cases hava been associated with exposures algnlfloaatly axcaadlng tha Tfaraahold Halt Value. A type of oaaear naiad aasothalloaM has baaa notad to ba aaaoelatad with asbastoa exposure la raeaat yaara. Thaaa tuaors, whlla rathar faw la aQiber to data, aay occur la ladlvlduala with hlatorlaa of only alight exposures, and that as aueh as twaoty to forty yaars earlier. Thara la ooaaldarabla evidence that erooldollta la seat frequently aaaoelatad with aaaothalloaaa. frea tha data available it appears that tha TW of 5 MttC* la net low enough to protest aagainst neeotbelioue, and It is gilts possible that NPKf is not, althar. Saaaarah on the probloa eontlauea. Control of asbastoa dust axpoaura is therefore necessary. th control gatherer*-1 004429 10MS7.D