Document ykM3vyBQ45MDvMRdRNKYDdG2X

FILE NAME: Union Carbide (UC) DATE: 1978 Aug 24 DOC#: UC083 DOCUMENT DESCRIPTION: Informal Report - The Occurrence of Ultra-Fine Fibers in 'Calidria1RG-244 Asbestos BUSINESS CONFIDENTIAL TO: Mr. J . L . Myers CC: Messrs. R. E. RvrneJ Dr E. W. Snortridge W. C. Thdrbe <P Aug 3 1 1979 INFORMAL REPORT rmjRBf/i Report No.: 2196-64 Date: August 24, 1978 Work By: B. L. In g a lls & G. J . Spencer Written By: H. B. Rhodes .THE OCCURRENCE OF ULTRA-FINE FIBERS IN "CALIDRIA" RG-244 ASBESTOS SUMMARY AND CONSULS IONS - During the la t t e r h a lf of 1977 several very high fib e r counts, i . e . , 20-40 fib e r s / c c , occurred during customer use of RG-244. The counts were associated with large amounts o f extremely fin e diameter fib e rs in the a ir samples. I t was not c le a r whether these fib e rs were due to a change in the product or had been present in the past and gone undetected. in order to a n sw e rth is question s ix t y - f iv e f i l t e r s from 36 customer locations co llected in the time period of 1973-1977 were recounted. Extreme care and attention was devoted to the detection of u ltra - fin e fib e r s . The re su lts obtained support the following: 1. P rio r to 1975 u ltra - fin e fib e rs were probably not present in measurable amounts. AH'7'1 ** 2. A fter/the expanded plant went on-stream in 1975 u n til md~mq such fib e rs were present at 30-45% of locations tested in s u ffic ie n t q u a n titite s to y ie ld maximum c e ilin g airborne concentrations th at were generally in the 1-3 fib e r/c c range. 3. During the spring of 1977 occasional batches o f product were made that contained a sharply increased amount of fin e s . This was possibly due to increased throughput through the dryer. These products resulted in several 20-40 fib e rs/e c counts. 4. The sudden appearance of high counts was real and not a re su lt of p rio r counting omissions. 5. Only one customer te s t has been run in 1978. The fin e s are therefore being checked with regular bagger samples obtained at the p la n t. This work w ill be reported elsewhere. BACKGROUND Union Carbide has provided an asbestos fib e r counting se rv ice to customers since 1973. In the time period 1973-1977 about 45 counts were made during the commercial handling of RG-244 asbestos. The highest re s u lts obtained u n til about the middle of 1977 were le ss than 3 fib e rs /c c with values under 1 fib e r/c c most ty p ic a l. A summary o f these counts, taken from the October 1, 1977 update of the "C a lid ria Asbestos RG-244 Health and 0SHA Information" brochure is shown in Tables I , I I and I I . These tab les include i l l o f The a va ila b le RG-244 re s u lts a v a ila b le through August 1977 except fo r a couple of f i l t e r s that were known to be h eavily contaminated with Nytal tre m o litic ta lc . a 1 n 1 nr UCC 000052 -2- BACKGROND (C o n t'd .) i S i i e 1ai er pi\r t r . 1977 counts i n . the 2 - 40 fib e r/c c range occurred at three customer lo ca tio n s, one o f which was in confirmation o f a verv hiah count found by an OSHA inspector. These high counts J e l a r g e l y 7ueVo the presence of a great m u ltip lic ity of extremely fin e diameter fib e rs at the lim it of detection of the counting method used. A long-time customer ri r ; i : rHU^ d^ XCellent. dUSi . COntro1 e^ P " * n t . also mentioned in ^ TM a lly oOff ^a ffiibb^e r//rcrc^ nnoww showl red/ anUnotSccWasHi-oCnha]l nrethseu ltPaiSnt thh3ed t1e-e2nfiibne rt/hcec 1orawngteen. ths y OBJECTIVE OF THE PRESENT STUDY The recent detection o f large q u an titie s of fin e fib e r in several RG-244 customer te sts can be accounted fo r in two ways: 1. U ltra -fin e m aterial has always been present, at le a s t sp o ra d ic a lly , and has la rg e ly escaped detection in the past. 2. The occurrence i n s u f f i c i e n t q u an titie s to cause the high dust counts is the re s u lt of a recent change in the product, l ' . e ., since about mid-1977. The objective of th is study was to d is tin g u is h , to the extent p ra c tic a b le , between these two a lte rn a tiv e s . . THE ANALYTICAL PROBLEM Asbestos fib e rs are counted with an o p tical microscope at 400-450X using phase contrast illu m in a tio n . Only fib e rs longer than 5u with L/D ra tio s greater than 3 are counted. The 5y length does not present any p a rtic u la r d if f ic u lt y but as the diameters become sm a lle r, the lim it of resolution of the microscope is reached and the f ib e r s , although longer than 5w, can no longer be seen. This occurs in the diameter range of 0.25-0.5.1. The lim it is not a sharp lin e but a "grey" area which v a rie s with such things as the microscope o p tic s , the s k i l l of the operator, the care which the operator takes in se ttin g up and adjusting the equipment, the v isu a l acu ity of the operator, the physical condition of the operator, the q u ality of the f i l t e r paper and the condition o f the clearin g solution used to prepare the s lid e . The lim it can d if f e r from day to day with the same operator using the same equipment. I t has also been our experience in working with u ltra - fin e fib e rs that they are very easy to miss completely unless the operator s p e c if ic a lly looks fo r such m a te ria l. PROCEDURE I t is the p ractice at the Niagara F a lls laboratory to re ta in the unused portion of a ll f i l t e r s c o lle c te d . F ilt e r s were found to be s t i l l ava ila b le fo r 36 locations where RG-244 counts had been made in the 1973-1977 time period. UCC 000053 A 10 196 -3- PROCEDURE (C o n t'd .) In order to keep the counting load at a reasonable le ve l only part of the a va ila b le f i l t e r s were recounted. Accordingly, several f i l t e r s which were expected to represent the highest le v e ls were selected to represent each lo catio n . These were mounted and recounted by our most a ctive operator with great care and with careful searching fo r u ltra - fin e p a r t ic le s . A to ta l o f 65 f i l t e r s were counted. . PRESENTATION AND DISCUSSION OF RESULTS The re su lts are summarized in Table IV . The data are lis te d chronologically by year with each location assigned a number to f a c ilit a t e id e n tific a tio n . The o rig in a l count (Column y ) , the new count (Column x ) , and the difference x -y , are shown fo r each f i l t e r . The Occurrence of Fine Fibers The recent recounts where u ltr a - fin e fib e rs were the object o f s p e c ific attention are obviously the best data to examine fo r the h is to ric a l occurrence of such fib e r s . These c o u n ts ,.in fib e r / c c , are shown g ra p h ica lly in chronological order in Figure 1. Where u ltr a - fin e fib e rs were seen, the bars are dark. Where none were found, the bars are lig h t . Note also in the fig u re th at a s p lit v e rtic a l scale has been * used wherein the units for.counts greater than 5 fib e rs /c c have been reduced by a fa cto r of 10. The occurrence of fin e fib e rs is summarized in the table below: Year 1973 1974 1975 1976 1977 No. of Locations Recounted 2 2 11 10 n _______ Occurrence of Fine Fibers No. of Locations %of Locations 0 0 0 0 5 45 3 30 5 45 During the two-and-a-half year period of 1973, 1974 and through March o f 1975 only one flo cculated bunch of fin e s was found on one f i l t e r . For the remainder of 1975, 1976, and 1977 fin e s occurred sp o rad ically at 30-45% of the locations te ste d . I f the fin e s had been present p rio r to March 1975 at the same frequency observed la t e r , two or three occurrences would have been expected at these eight lo ca tio n s. This suggests that measurable q u an titie s of very fin e fib e rs occurred r a re ly , i f at a l l , before 1975. They have c le a rly been present with considerable frequency since that time. The quantity of fin e s present, p a r tic u la r ly with regard to the potential to give occupational exposures above the present OSHA c e ilin g lim it o f 10 fib e rs /c c also shows a d is t in c t pattern. In the two-and-a-half y e a r period from 1975 to mid-1977 there was only one count above 10 fib e r s / c c , i . e . , 1975 - No. 5 which was ju s t above at 11.3 fib e rs / c c . The highest counts in th is time span were g enerally in the range of 2-3 fib e rs / c c . In the second h a lf o f 1977, however, three counts ranging from 18 to 40 fib e rs /c c were obtained. (Note sca le chatfgei pi UCC 000054 " 1 it -4- f ig u r e .) One of these (1977 - No. 11) v e rifie d an OSHA inspection count o f around 25 fib e rs/c c obtained at the same location a month e a r lie r . r i 1?iQ77n i thI \ 6 t i r ! e v? ry high re su lts in det a i l shows that in one case (1977 - No. 6) su b stantial q u an titie s of Nytal t a lc were used at the same time as the RG-244. This t a lc generates extremely fin e fib e rs which cannot be distinguished o p t ic a lly from c h ry s o tile asbestos. I t is thus not possible to determine the r e la tiv e contributions o f each to the to ta l count so th is re su lt cannot be given much weight in the present assessment. In the second location (1977 - No. 8) a "homemade" dust control setup was in use. A ir from over the mix tank was sucked through a f le x ib le duct by an exhaust fan, passed through a f i l t e r , and discharged into a _s ?on ('oom* The re s u lt shows the presence of su b stan tial q u an tities o f fin e s in the asbestos being dumped but is not d ir e c t ly co rrelatab le with worker exposure in the breathing zone. The th ird high count occurred in two samples from 1977, Location No. 11. Both of these took place w hile an operator was dumping bags, folding them, and in se rtin g them into a metal drum. When the bag entered the drum, a blowback of a ir resu lte d . A repeated te s t several hours la te r which d iffe re d in that the operator tossed the empty bags on a p a lle t which was subsequently removed by a f o r k l i f t , gave much lower counts in the 1-2 fib e r/c c range. As noted p re vio u sly, however, OSHA had reported a high count at th is location e a r lie r . In summary, there have been two confirmed occurrences o f high exposure, ^20-30 fib e rs / c c , one of po tential high exposure, and one of possible but not d e fin ite high exposure due to u ltra - fin e fib e rs in RG-244 in a six-month period in the second h a lf of 1977. Although these high le v e ls c le a rly re la te to the way the asbestos was handled, i t is equally important to note that over the four-and-a-half years p rio r to th a t, only one c a se b a re ly above 10 fib e rs /c c had been id e n tifie d . Some of these 30 e a r lie r locations tested should have shown very hign counts i f the potential fo r such le v e ls was present in the m aterial being handled. The product being used by customers in the la t t e r h a lf of 1977 was o ccasionally d iffe re n t from that produced in the past. The pattern ju s t described appears to co rre late with ce rta in plant operations. In the spring o f 1975 the expanded c ir c u it was started up. Increased throughput in the dryer would give higher percentages o f fin e fib e rs in the product and correspondly such fib e rs would be found in airborne dust samples. In the spring of 1977 the production rate of RG-244 was again increased s u b s ta n tia lly and campaigning through the dryer was practiced frequently. I t seems lik e ly th at there were in te rv a ls where a number of bags of product contained a sharply increased amount of fin e s . This would re s u lt in a high potential fo r airborne dust generation, p a rtic u la rly i f the bag was handled c a re le s s ly in any way. UCC 000055 A!019g -5- Considering the experimental re su lts together with the knowledge of__ the RG-244 c ir c u it operations , the following p ictu re o f the h is to ric a l occurrence o f fin e fib e rs in the product can be drawn: 1. U ntil the spring of 1975 fin e fib e rs were present at extremely rare in te rv a ls , i f at a l l . 2. Following the plant expansion completed in the spring of 1975, measurable amounts o f fin e s were present in the airborne dust at 30-50% of the users' lo ca tio n s. ' 3. U ntil mid-1975 the amount of fin e s present was small enough so that c e ilin g exposures were g enerally s t i l l in the 1-3 fib e r/c c range. 4' 1977' probabl-y 1,1 the second and/or th ird q u arters, RG-244 was produced o ccasio n ally that contained much ' higher le v e ls o f fin e s than in previous y e a rs. Fib er counts of 20-40 fib e rs /c c could be produced under conditions encountered commercially with these m a te ria ls. The extent o f the fines problem in 1978 operations remains an open question. The plant continues to run at a high throughput. The only user te s t ca rrie d out was in February and the highest count obtained was an encouraging 0.1 fib e r / c c . No laboratory te s t o f r e la tiv e dustiness is a v a ila b le . The p o s s ib ility o f developing such a te s t was considered and dropped when i t became evident that i t would be a major pro ject to work out the te s t and obtain the co rre la tio n with actual f ie ld use conditions that would be necessary. A continuing monitoring of regular samples from the RG-244 bagger operation at the plant is in progress, however, and is being reported elsewhere. The Impact of Fine Fibers in P rio r Dust Counts The emperical precision o f the o p tical counting method used in th is work is the subject of continuing debate. Differences of 50-100% between re p lic a te counts on the same f i l t e r are quite common and larg er v a ria tio n s can occur as the quantity of fib e r on the f i l t e r becomes sm aller. I t is well beyond the scope of th is study to analyze these re s u lts in a general way. Only the s p e c ific e ffe c ts on the samples where fin e fib e rs were found in the second count w ill be examined. Figure 2 is a repeat of Figure 1 with the o rig in a l count re s u lts fo r the f i l t e r s containing fin e fib e rs indicated by the s o lid horizontal lin e s . Out .of 19 f i l t e r s containing fin e s there are only two where large changes occurred. These were 1975 - No. 5 from 1.3 to 11.2 fib e rs /c c and 1977 - No. 8 from 0.5 to 17.92 fib e r s / c c . There is no doubt that the fin e s were missed in the i n i t i a l counts on these two filte rs . UCC 000056 A 0 1gg -6- I h.g-ifPa.ct._pf Fine Fibers 1n P rio r Dust Counts (C o n t'd .) The other three high counts from 1977 show v a ria tio n s between rep lica te s n i v f h f h ct11 W 1iiln the *:eco9n1'2ed Precision of the method. The next highest results ranged from 2-3 fibers/cc and occurred at four locations in 1975 and 1976, i . e . , 1975 - Nos. 4 and 8 and 1976 - Nos 3 and 6. These have a c o n s is te n t bias o f plus 2-3 fib e rs / c c . Since d ifferences are a ll in the same d ire c tio n , they are probably s t a t is t i c a l l y s ig n ific a n t but are also of lim ited p ra c tic a l importance since the re su lts are fa r below the allowable OSHA c e ilin g lim it . Overall then, only two out of the 65 f i l t e r s counted showed important e r r o rs ' due to the fa ilu r e to "see" the u ltr a - fin e fib e r s . Considering the extremely d if f i c u l t nature o f these samples, th is is considered to be very good counter performance but continued sp ecial attention to RG-244 samples is needed and w ill be provided. The sudden appearance ot occasional very high counts in 1977 was the r e s u lt o f a change in the product not a change in counting s k i l l s or equipment. HBR/rmm Attachments / Harrison B. Rhodes; UCC 000057 A: 02oc l/XbLt i a i r b o r n e a s b e s t o s f i b e r c o u n t s f1?- Plant A B C D E F G H 1 J K 0) All ( 2) Data Reference .-- 1929-46-2 1929-30-2 1929-56-1 1929-50-3 1929-26-3 1929-24-2 1929-16-1 2119-8-9 2119-6-23 2119-12-9 W g ^ . C A L E - ' PUMPING^ RG-244 Description of Operation Bags Dumped Dump Time (Min.) Sample Time (Min.) 10 10 10 '.14 9 9 ` 15 21 21 ,. (-lOQ-asn 1h /,,t-wf Special Ventil ation'^' CEILING Conrpntrj1 Fiber Count (Fibers/cc. >5U ; None 0.7 None 1.2 Htoanokd oopveenrintghin 0.7 36 12 12 None 2.4 15 8 8 None 0.5 45 20 20 None 1.6 10 24 24 Hood over mixing area 0.8 28 15 15 None 13 8 8 None 20 10 10 None 34 72 72 None 2.8 0.4 * 0-4 0.9 samples collected in the breathing zone of the operator dumping the RG-244 TABLE II AIRBORNE ASBESTOS FIBER COUNTS EMPTY BAG REMOVAL Plant A Data Reference B 1929-40-3 B 1929-40-5 2119-6-23 UCC 000058 Description of Operation Sample taken 3 feet above waste disposal ; drum for empty bags. (During dumping.) Directly over empty bag stacking area. Taken during dump. Empty bag storage area. Taken during dump as bags were put in. Sample taken during bag disposal and clean up. Sample Time ) 10 23 24 A 24 Fiber Count (Fibers/cc. >5p) 0.4 0.6 0.4 0.1 TABLE III airborne a sbesto s FIBER COUNTS ,,"SMALL-SCALE" DUMPING OF Rfi- 244 (1-25 lb s ./ B a tc h ) End Use Fu rn itu re Molding U || U at Gel Coat Mfg. 1 ll u ^ A r t i f i c i a l B ric k Mfg. " n Roof Coating Mfg. Cel Coat Polyester Epoxy II Gel Coat Putty U Seal ant Caulking Compound n ,, Patching Compound Pounds Dumped Dump Time (M in.) 1 10 12 2.5 i 11 6 8 9 25 3 3 5 4 1.5 10 12 13 10.5 13 25 11 6.3 41 6.3 39 20* 10 20 35 20 34 15 19 6 3 6 11 3.3 10 Sample Time (M in.) 10 2.5 11 8 25 3 4 10 13 13 11 41 39 10 35 34 19 3 11 10 Special V en tilatio n ^ ' None . None None Good Hood None None Good Hood None None Outdoors None None None Exhaust Fan Exhaust Fan None None None Hone C e ilin g Concentration F ib e r Count ........(F ib e rs /c c >5u) 1.5 1.1 2.0 0.9 0.7 1.2 0.9 0.4 1.1 0.3* O.'l 1.0 2.0 0 .6 * . 2.1 0.2 0.2 0.5 0.2 0.7 0 .) A ll sar.p les c o lle c te d in the breathing zone of the operator dumping the RG-244. ( 2) th a t1? ] s p e c if ic a ? lv r inteSdirf J u st c o lle c t l' Dn equipment a t or near the dumping area * Sample taken during dump and bag d is p o s a l. UCC 000059 A 1020 c. siim i _l(C-?<4 AIRBKh'c FlBtR COimS loc Y ir No. Company r m i Hughes Chetdcil 2 K rlltll Knft H M 1 T u ff kote 2 Kinetics Inc. 1975 1 Bridgeport Chemlcil 2 G lis s f lik e Corp. 3 (C a rg ill Corpany C a rg ill Cor.pany (Alpha Chemical 4 Alpha Chemical Steadfast Rubber Acme Fiberglass Co. (In te rn atio n al P iin t Co. 7 In te rn atio n al P ilo t Co. (In t e r p U s t ic Corp. S ln tc rp la s tlc Corp. In te rp la s tic Corp. (Glove Coaten 10 \ Glove Colters 1 11 Generil T ire ' 1976 1 Alpha Chemical <A-Z 2 r[A-2.. 3 j[Freesian Chemlcil Freeman Chemlcil Apperson Apperson Apperson S U .S . P la s t ic 1 Chemical Corp. i Solvean Laboratories 7 Tehoku P la s tic Engineering (In te r p la s tic Corporation t |ln te rp U s t1 c Corporation t tod Devi) Inc. (Metro Warehouse lo iHetre Warehouse (Metro Warehouse O rig in al Count (y ) Ilon cr . Ml aojn^it*oreda Ho. DOe xprerr1lntlHo n~ , Fibers Date Tibers por cc Recounted per cc Cements w 8-20-73 2-245 P - During use of RG-244. 1.0 4-10-78 0 .2* * Fine p a rtic u la te . FI 8-24-73 5 P - Dump } pounds. HI 4-30-74 C-634 P - Ctom 25 pounds. NH 8-13-74 1-13 P - Shaping pipe. 0 .3 5-3-78 1.2 Fire particulate, pocr background. 0 .3 5-2-78 0 .6 Ho fin e fib e rs . Difference Between Counts -O.e -0 1 +0.9 *0.3 FI 2-2-75 L-10 p - Kindling asbestos. 0 .2 FL 2-18-7$ H-19 P - Dump 7 pounds. 0 CA 2-19-75 0-39 P - Du*p 15 big s. 1.3 CA 2-19-75 Q-36 P - Empty big removal. 1.3 FL 5-7-75 A-21 P - Handling empty bags. 0.7 FL 5-7-75 A-M P Durrp 6 bags. 0 .4 K4 5-20-75 A-l p Weigh 1 dump 10 pounds. 1.3 CA -13-75 A-77 P - Grinding fib e rg la ss 2.1 tubes. NJ 8-13-75 B-82 P - Dump B bags in to Cowles . 1.24 NJ 8-13-75 8-71 P - Dump RG-244. b ig d ls- 0.65 p o sa i. Ki 9-5-75 B-33 P - Durrp 2B bags. 1.0 w 9-5-75 B-8 P - A fte r durp. 0.2 OH 9-18-75 B-49 p - A fte r durp. 0.3 HI 9-26-75 8-29 P - 90 pounds RG-244 to 5.3 m ixer. HI 9-25-75 C-81 A - During md a fte r RG-244 0 .3 dunp 151 from m ixer, 5' bove flo o r. OH 12-10-75 t>*25 P - Dump 10 pounds. 0 .3 CA 1-19-76 0-34 P - Dtmp 2-1/2 b ig s. 0.1 FL 3-3-76 0-76 P - Dump 13 b ig j. 0 .3 a 3-3-76 C-97 A - 13 bags dumped. 0.4 UI 3-25-76 D-9B P - Dump 20 pounds. 0 .6 VI 3-25-76 0-45 P - A fte r dumo. 0.7 FL 3-29-76 D-75 A - Unloading p a lle t s . 0.1 a 3-29-76 D-84 P - F o r k lif t operator. 0.1 FL 4-1-76 D-6 A - Unloading p i l l i t i . 1 .0 Nf 7-29-76 r-36 A - Weighing 3 pounds. 0 .8 4-6-78 4-10-78 4-6-78 4-6-78 4-5-78 4-5-78 5-5-78 4-5-78 0.2 0.2 0.4** 0.4** 2.1* 0.4 11.2* 5.1 One very fin e bundle. Ho Mne fib ers Ho 'fine fib e rs . Ho ,rine fib e rs . Poor re so lu tio n , several planes. Fine fib e rs. Poor re so lu tio n , several planes. Some very fine fib e rs . Poor reso lu tio n . 0 0.2 -0.9 -0.9 +1.4 0 *9. S +3 4-10-78 1.5 4-15-78 0 .5 Ho fin e fib e rs Ho fin e fib e r s . 0.36 -0.05 5-1-78 2 .3* Some very fin e fib e rs . 5-1-78 0.1 No fin e fib e rs . +1.3 -0.1 4-10-78 0.3 Poor resolution - several 0 planes. 4-10-78 1.9 Clear background. -3.4 4-10-78 0.3 Fine p a rtic u la te , some very 0 fin e fib e rs 1n areas not containing fine p articulate. 4-10-78 0.3 0 4-5-78 4-5-78 4-5-78 0.2 0.17 0.5 One extremely fin e bundle. Ho fin e fib e rs . No fin e fib e rs . 0.1 0.4 0.1 5-1-78 2 .8* Some w r y fin e fib e rs . 5-1-78 0.5 Some *fine fib ers (not as toy ill D-98). 2.2 -D.2 4-6-78 5-1-78 4-6-78 5-5-78 0.1 <0.1 0.04** 0.3 Ko f ir # Ho f i r * Ho fin e fib e rs fib e rs fib e rs , No f i r * fib e rs . 0 0 -1.0 -0.5 CA -3-76 1 P - Weigh 6 dtiap 340 lb s . 0.9 Japan 9-8-76 OK 10-12-76 OK 10-12-76 OK 10-12-76 MO 11-22-76 MO MO 11-22-76 1 F-43 G-38 F-33 -76 C-24 F-69 P - Dump 1.5 kg RG-244. 0 .7 (N ytal 300 t a lc also dusped.) A - During thnp. 0 .2 P Dump 30 pounds. 0 .5 P - Weigh 6 dump 6 pounds. P - Fo rklift r - Fo rklift P - Fo rklift 0.1 0 .2 Op? 0 .5 5-5-78 6-1-78 2.04* 1.1 Some w r y fin e fib e rs d if f i c u lt to count. No f i r * fib e r s . 1.14 *0.6 6-3-78 5-3-78 5-5-78 $-2-78 t-Z-78 $-2-78 0 .3 1 .3 0.9* 0.6 0.1 0.7 No fin e fib e rs . Poor background - granular looking. No fin e fib e rs . No fin e fib e rs . No f ln t f ib e rs . Ho firvt fib e rs . 0.1 0.8 0.8 0.4 -0.1 +0.2 A Arti P - Pentoli UCC 000060 Higher thin o r lg f n il. lo w tr then o rly tn a l. A 10203 2- toe. I d ' Ho. Corrany Date Sanplr Loe. Honitored Ho. Operation O rig in al trS,b *,,rJ1' 1 \ F'ibrers '> er_cc Recounted per cc Cements CSounitsr tv .- i 1977 ! Horton Coepany 2 Coatings 1 P la s tic (Adcoat Inc. / j Adcoat Inc. [Cartoline Corrpany iCartoHne Company Carbol ine Company - 4 Cartoline Company Cartoline Company * Cartoline Company Cartoline Company 5 eterner 6 Tnemec Inc. 7 Products Research and Chemical Corporation *J 2-16-77 R-38 t - Dump 15 pounds. : M 3-2-77 A-20 P - Weighing l . f i pounds and dump. 0.2 5-2-78 0.4 No fin e fib e rs . 0.2 4-6-7B 0 .9 St fin e fib e rs . * +D.2 +0.7 CA 3-30-77 8-79 t - Dump 48 lbs,-outdoors 0.1 4-5-78 0.4 Ho fin e fib e rs . +0.3 a 3-30-77 8-38 A - A fte r use o f RG-244. 0.1 4-5-78 0.1 Ho fin e fib e rs . 0 OH 4-SU-77 K-4 P - Dump 50 pounds. 0.6 5-1-78 1.03 F ire fib e rs *0.23 OH -S it-77 K-5 P " A fte r 50 pound dump. 0.16 5-1-78 0.1 Fine particulate -0.06 OH 4-516-77 K-36 P Dump 179 pounds. 0.2 5-1-78 0 .3 Fine f ib e r s , several planes. +0.1 OH 4-516-77 A-B8 P - Normal d u ties. 0.01 5-1-7B 0.1 Chunky i fin e p a rtic u la te . +0.09 OH 4-516-77 R-31 P A fte r 179 pound dunp. 0.4 5-1-78 0 .8 No fin e fib e rs . +0.4 OH -516-77 K-46 P - Weighing 179 pounds. 0.13 5-2-78 0 .3 Chunky i fin e p a rtle u lite . +0.17 OH 4-516-77 X-33 P - Weighing 50 pounds 0.18 5-1-78 0 .7 Chunky p a rtic u la te . 0.52 RG-244. n 5-10-77 A-50 P - Dump 2 bags and bag 0.2B 4-6-7B 1.5* Poor re so lu tio n , several d isp o sa l. p itie s. +1.22 MO 5-16-77 K-35 P - Dump 50 pounds. i 6-22-77 28.5 5-5-78 39.8 Some extremely fine fib e rs , +11.3 poor background due to p a rticu la te , several planes. Kytal 300 ta lc used during monitoring. CA 6-30-77 B-35 P - Dunp 70 pounds. 0.1 5-2-78 0 .2 No fin e fib e rs +0.1 OH r- " 6( i JDayton them i Coat. OK 9 International Paint CA 10 Southern Imperial Coatings LA 7-14-77 N-S9 A - In outlet of exhaust through which f ilte r e d a i r was re c irc u la te d . (Re-checks by B. L . In g a lls on 4-28-78) 7-H-77 B-3-77 9-12-77 N-98 E-43 D-7B P - Dump 20 pounds. P - Dump 40 pounds. P - Dump 52 pounds. 0.5 4-6-78 17.92 (P 400)0 i f 1000X1 0.3 4-6-78 8 .8 20.9 0.7 0 4-10-78 0.54* 8.6 5-5-78 12.7* Cartoline Company Cartoline Company . Cartoline Company Cartoline Company Cartoline Company C artolin e Cocpany Cartoline Company Cartoline Company Cartoline Company Cartoline Corrpany CA 12-13-77 C-43 P - 220 pound durrp. ca 12-13-77 C-4D P - 220 pound dump. CA 12-13-77 C-36 P - Eag d isp o sal. CA 12-13-77 C-31 P - A fte r dump. CA 12-13-77 C-37 P - Dump 220 pounds a 12-13-77 M-45 P - Dump 220 pounds CA 12-13-77 A-41 P - Bag d isp osal. CA 12-13-77 A-42 P - Bag d isp o sal. CA 12-13-77 C-39 P - Bag disposal CA 12-13-77 H-59 P - Bag disposal 44.5 31.5 0.5 0.4 1.4 0.4 0.3 5 .8 1.7 0.4 5-2-78 5-2-78 5-2-78 5-2-78 5-2-78 5-2-78 5-2-78 5-2-78 27.8** 22.4** 0 .6 0.4 0.94 0.4 0.7 1.4** 5-1-78 5-2-78 0.9** 0 .4 Extremely fin e fib e rs - very +17.42 d if f i c u lt to count - took 50 Minutes to count only 50 f ie ld s . No fin e fib e rs . *' No fin e fib e rs . Heavily loaded with small end chunky p a rtic u la te . Fine fib e rs . Fine fib e rs . No fin e fib e rs . No fin e fib e rs . No fin e fib e rs . No fin e fib e rs . No fin e fib e r s . Poor d istrib u tio n observed on U r s t count. Poor d istrib u tio n No fin * fib e rs . +0,4 0.54 +4.1 -16.7 -9.1 +0.3 0 -0.46 0 +0.4 -4.4 -0.8 0 A - Arti P - Penanti Higher thtn o r ig in a l, "Lo w e r than o rig in o !. UCC 000061 ^ '0204 FIBERS PER CC LOUCER THAN 5 HICROCTERS Z90000 0 3 Q figure i location-*- / Z / X T*r-*- ~ / 9 7 J A -- 1174 FIGURE Z