Document b5M8raerGn8RX3mMRmxnQmdr0

N.B. No. 1929-48-1 1929-48-2 1929-48-3 1929-48-4 SUMMARY OF DUST COUNTS Description Fiber Count Fibers/ml. > 5 u. Environmental - "Background" sample near filler bins on (81 min.) ladder 15 ft. from bag hopper for small raw material ingredients. 1.7 Personal (2 min.) - Operator's assistant handing bags to man who dumps. 6.2 Personal (2 min.) - Operator dumping 2 bags 7RF9 and 3 bags SG-210 8.0 Personal (2 min.) - Operator dumping 7 bags Muscovite mica 3.6 Total Dust mmppcf 2.8 6.9 10.1 13.8 AIRBORNE FIBER COUNTS for TAPE JOINT & TEXTURE PAINT COMPOUNDER August 21, 1973 Present for Present for Union Carbide Corporation: Mr. J. E. Walsh Samples Analyzed By: Mr. E. J. Kleber UNION CARBIDE CORPORATION Mining and Metals Division Niagara Falls, New York OESCRIPTI0N CF PLANT & TESTS Testj were conducted August 21, 1973 at manufacturers of Tape Joint Compounds. ,t Personal breathing zone and environmental samples were collected in an effort to determine the amount of airborne asbestos fiber generated during the manufacture of and during unloading of a car of SG-210. Samples are described in the Table. Sampling and dust counting were carried out in accordance with OSHA Regulation 1910.93a, using the Bayer, Zummalde and Brown method for counting asbestos fibers by phase contrast microscopy (Bureau of Occupational Safety and Health, Feb. 1969). Battery-powered air pumps (M.S.A. type) calibrated to 2 liters per minute were used to collect personal breathing zone and environmental samples on millipore membrane filters of 0.8 micron porosity. Fiber counting was performed on a Vicker's phase contrast microscope utilizing a Porton reticle for sizing and field definition. TEST RESULTS Two figures have been reported for each sampl-e. They are: I. Total Fiber - Any material longer than 5 microns having an aspect ratio greater than 3:1. 2. Probable Asbestos Fiber - Any material meeting the criteria in No. I which in the judgement of the operator could possibly be Chrysotile fiber. Sample No 1 Field No 1 10 2 221 3 218 4 212 5 269 6 292 207 8 145 SUMMARY OF FIBER COUNTS Description Total Fiber Fibers/cc 5 -*r ProbabI Asbestc Fiber Fibers/ >5 tnvironmenta1 - Located 5 ft. off floor and 2 ft. to CIO min.) the left of dry blending through. Monitored between batches. 0.7 0.4 Persona 1 (5 min.) - Dry blender operator ( n) during addition of 200 lb. 7RF9 and 90 lb. SG-210. 22.2 16.7 Environmenta1 - Same position as No. 1 during addition of (15 min.) 200 lb. 7RF9 and 90 1 b. SG-210. Persona 1 (12 min.) - Dry blender operator ( ) completing batch with other dry ingredients such as Mica, etc. Environmenta1 - Same position as No. 1 between batches. (16 min.) 3.9 3.6 2.2 1.5 o.e o.: Persona 1 (II min.) - Wet mix operator ( ) during blending of dry ingredients with and water. 3.5 i .< Environmenta1 - Located 12 ft. from floor in middle of car (75 min.) door opening. Monitored from time door was opened until completion of unloading. 2.0 i.i Persona 1 (87 min.) - Car unloader ( unloading. ) during entire 2.7 2. i REPORT OF CALL cc for r* AWW7P5 s; w i-i X J. Kleber - Niagara Fallj ^ - -< ~V* ^ on - . B. Rhodes - Niagara Fall^.o. . C. Thurber - NY 38 KC Files NF Files- L'N`! ON CARS ID CORPORA!! ON Box 579 Niagara Falls, N.Y. 14302 By. Da+e J. E. Walsh 7/31/73 Full Name Georgia Pacific Interviewed Address Mfrs. of Marietta, Georgia 'Tape Joint\Muds Bob Favero - Plant Manager Doug Jones - Quality Control __________________________________________________ Call made to run dust count per oheir request. The following is the data on the samples taken which have been forwarded to E. J. Kleber's attention for counting. 2 0- Sample Nc. Sample Time 139 /,S'-0,<J 125 nia. /3 ? 210 // </ 7 min. 96.6 t W.tf 6 min. 7/7 225 H ' ' - ^ ^ ? 7 min. 3 S t 216 ?l 2 - -0-3 7 min. Sample was attached to John Tinker, plant foreman, during his normal travels around the plant. It was felt that Tinker would be the most logical person who, during his work day, would cover all areas in the plant. Personal sample on James Conner during redi-mix operation where HgO, latex and blended dry in gredients are mixed on five foot high platform. Exact repeat of sample 210 on next hatch made to give us duplicate results to compare count levels. Background sample directly behind the vet mix platform area 10 feet above the floor. Sample taken during one complete batch mixing of water, latex and blended dry ingredients. A noticeable puff of dust is generated when dry ingredients are dropped into the tank. Personal sample on Gary Dellorso during the nixing of dry asbestos ingredients only. Two 100-lb. bags PF9 and three 30-lb. bags of SG-210 were added to Iry mix Trough with overhead dust collector. -2- Sample No. Sample Time Yf'i 21,1 3i.r /X'Sas /-i'f 11 min. 3 n X 206 2'- ' /2 t 5min. // 6/ 16 min. 3 . i> 130 2. i - / ^ 37 min. --- " ASWJ.WA 0\g UUA XIA*. ksAAG addition of the balance of dry mix materials. Materials added were 350 lbs. mica, ^0 lbs. PVA, 37-1/2 lbs. Natrosol. Exact repeat of sample 216 on next batch to give us duplicate results to compare count levels. Asbestos ingredients only. Exact repeat of sample 2^1 on next batch to give us duplicate results to compare count levels. Other dry ingredients only. Background sample during mixing of all dry ingredients. Located two feet to the left of the trough and five feet above the floor. Slight amount of dust was noticeable that trough overhead dust collector did net take out. Background sample located in same area as sample 193 and taken during the period directly after the last batch of dry ingredients were mixed and up to the start of the next batch mixing cycle. Some interesting comments picked up during the day were that Gene O'Neill from Tigard is due 00 report in here August 1 and will be their Q.C. and E & D head for tape joint muds in the Southeast. Hank Peal, located in Wilmington, Delaware, is G-?'s Eastern Regional Manager for Safety and all CSHA and EPA regulations. Jones phoned Peal after the count was done and discussed the cost of the equipment needed to run spot counts in the future, and it looks like Marietta will get the G.K. to buy one. G-P may have solved the problem of an asbestos re placement in dry-mix muds but are at a dead end for one in redi-mix muds. During the mixing of asbestos dry ingredients, the bags of 210 on the pallet used were dirty, in some cases torn, and with visible asbestos evident, laying between the bags throughout the pallet. The 7RF9 bags from the pallet being used were, unfortunately, all clean and untorn, and loose asbestos was not evident JEW/cs Typed: 8/1/73 Q T//r> -e. LotsJ c? :i 1 >/_ ? / '. Ut A "7 1 ! 7 7 ___ *.; .4, ' 4/0 n <? -e 7 7, - - * /."s~'"'/?/i-`""d7o /y/"~ bTcT/C7~' r7 "~zej Z__Z_-23._Z_Z__'.iZ-.HTSi--ZLliltslf.;k-Qi-MiJ-iiiJTZ^L..L J--dhZ..aCLScl^.L.. l.2i. _____ :.?./.... ______ /____________-?...:.................:..o/J/ 1 /. 7./V. '.?./.i. ... 7-5_" <? X 'if,0-,--'---.\./J{' .b~./. .7,, ______ -................ O/.c.________ -7- ___ : _4_1_________1 -oXl._l ._. t____... 4_J____ i _? 4.____ i . -6__________ t; _ 7_ _: / !_ ' tA?7 ' jy.-_.iL -----4------------------------------- .i./j.ZJJiSZ Z Z .IZV I" JjJL ______________ _ ___ j_ _ j 0/4 _ ____ / a_________ __________________ ; <ZY)___________ J/u _____ [___ (2____ ;________ _____ iJl_____ _ "d0l/LL _____ \.JL \/I 0 .OJ.J------------ : .Z/_:_______ L_l. ,* `A>^ <c<7 4 fC fit , , Y 5>SUy, 4 i'. C /fct;_______ REPORT OF CALL J2^J. r.ieber - Niagara Falls B. L. Ingalls - Niagara rails T. ?. Norris - Chicago v. r . Cai'Jiin-fs AWiS7lM c H. 5. Rhodes - Niagara Fails W. C. Thurber - NY 38 XC Files NF ?' ' UNION CARBIDE CORPORATION P.0. Box 57? Niagara Faiis, ''if?. By______J. E. Walsh Date 8/21 k 8/22/73 Fu 11 Ns/re Address Mfrs. of Georgia Pacific Marietta, Georgia Tape Joint Muds 1nterviewed Doug Jones - Quality Control Call made to collect another set of nixing samples and to observe the unloading condition of the six shrink-wrapped pallets of SG-210 in the car The following samples were collectei during the manufacturing of joint cement: ^o. 110 - Faokcrouns. - Sam; ie was hung five feet off the floor and two feet to the 1 of the cry blending trough arm covered the period between the finish o the last bat: and the mixing of dry cler. . ingredients for the next eaten. Time on, '5 p.m., off :nal - Att: covers the audio ion of tv on 1:15 p.m., off 1:20 p.: 3?vi Gaytan, the operator of the dry blender. Sar.pl L. bag.- of 7F.F9 and three 30-lb. bags of 30-210. Ta: / No. 22 8 - Bac.s tne period dur Tine on 1:15 P ,nd - Sample v. s located in the same osition as 110 sample and covered l>*jC -I JL i ^ i. d O. 200 j.bs. of TRFy and 90 lbs. of SC--210. oil' 1:30 p.m 'jj/tlo. .212 - Personal - Attacned to Sam the following dry ingredients co ecu; Hatrosci, 37-1/2 lbs.; .Dovicil ICO, ' off 1:2c p.m. or., the dry blend operator, during the addition o: tne baton: Mica. 35b lbs.; Gelvatoi, LG lbs.; Ibr.. Caigcn, 12-1/2 lbs. Time cn l:l6 p.m.. No. 269 - Background - Sample was located in same position as 110 and run during the period starting from tne end of one bate to the start of ~he next one. Time on 1:30 p.m., off 1:16 p.m. - Personal - At .ached to vet mix operator Robert kuie curing the mixin. of blended iry ingredients with latex and water. Time on 1:18 p.m,, off 1:59 p.m -2- The above samples were taken on 8/21 prior to delivery of the carload by o1_ j**+ abcui '! 13'1- Pm 9 v**w Ccu." UvutiiCiu xuu i>v G-P's unloading door. Doug and I tried to open the car door but it was stuck so we went to the use of a crowbar and tension chain. The best we could do was open the door about two inches, and when we did, a virtual asbestos snowstorm came blowing out the door, covering us from head to toe in white. After it stopped bloving, we looked in the door opening and saw that the problem was that the front four pallets by the door had shifted during transit and about 40 SG-210 bags were wedged against the door, preventing us from moving it. Due to the hour, we decided to forget it for the day and start in on it at 7 a.m. the next day. In the morning, with the help of an experienced fork lift driver and boxcar unloader, we finally were able to free the door after Lo minutes of time had elapsed. After removing the damaged bags in the door area, I climbed up inside the car to locate the shrink wrapped pallets. Four of them were visible in xhe far end of the car. Loose asbestos lay on top of every pallet in the car ana five to ten pound piles were all over the door area, between pallets, on the floor and between bags. The following samples were taken: '-fio. 207 - Background - On 7:55 a.m., off 9:10 a.m. Located 12 feet from the floor in the middle of the car door opening. Sample was run from the time the door was opened until the work on the car was stopped. ANo. lL$ - Personal - On 7:^5 a.m., off 9:12 a.m. Attached to John Tinker, operator unloading the car, from the time the door was opened until work on the car stopped. After an hour's work, the doorway area was still only half cleared and our chances of getting to the shrink wrapped pallets were about a day away, according to Tinker. As the writer had to catch an 11:00 plane, it was agreed that G-P'would set aside the shrink wrapped pallets when the car was finally unloaded and I would come back after Labor Day to observe what they looked like. JEW/cs Typed: 8/31/73 .A UNION CARBIDE CORPORATION MINING & METALS DIVISION P.O. BOX 579 NIAGARA FALLS * August 2, 1973 Mr. Doug Jones Georgia-Pacific Company 1466 White CircIe Marietta, GA 30060 Dear Mr. Jones: At the request of J. E. Walsh, enclosed is a copy of the recognized procedure for obtaining airborne asbestos fiber counts. Along with that is a list of equipment needed to perform these counts. If you intend only to obtain these counts and have them analyzed elsewhere, you only need the equipment marked with a red line. A substitution that can be easily made is the soap film flowmeter. One can cut the bottom of a graduate and rig a flowmeter without spending $40.00. Please let us know if we can be of any further assistance. Simply contact Mr. Walsh at Union Carbide's Atlanta Saies Office. We look forward to serving you. EdwarcKJ. Kleber1^ Customer Service Representative Enclosure cc: J. E. Walsh /ds ASBESTOS FIBER COUNTS for December 29, 1972 Personnel Present: Mr. E. J. Kleber Union Carbide Corporation Mr. T. P. Norris Union Carbide Corporation UNION CARBIDE CORPORATION Mining and Metals Division Niagara Falls, New York DESCRIPTION OF PLANT AND TESTS Tests were conducted November 27, 1972 manufacturers of tape joint compounds. Dry ingredients are added at a loading hopper the load is then conveyed to a bagging machine. Both operations were monitored. APPARATUS AND PROCEDURE Sampling and dust counting were carried out in accordance with OSHA Regulation 1910.93a, using the Bayer, Zummalde and Brown method for counting asbestos fibers by phase contrast microscopy (Bureau of Occupational Safety and Health, Feb. 1969). Battery powered air pumps (M.S.A. type) calibrated to 2 liters per minute were used to collect personal breathing zone and environmental samples on Millipore membrane fiIters of 0.8 micron porosity. Fiber counting was performed on a Leitz microscope utilizing phase contrast illumi nation at 400X and a Patterson Globe and Circle reticle. Total dust was determined by light field microscopy at I00X. TEST RESULTS Three figures have been reported for each sample. They are: 1) Total Fiber - Any material 5 microns or longer having an aspect ratio of 3 or greater. Reported as fibers per milliliter. Note: This figure is considerably higher than the "possible" asbestos fiber count. The presence of Mica in the test accounts for the large figure. Mica, a mineral with a plate Iet-type appearance fits the strict rule of greater than 5 microns in length and having an aspect ratio larger than 3. However, it is obvious that these platelet structures are not asbestos, nor even fibrous in nature. 2) Asbestos Fiber - Any material, 5 microns or longer, having an aspect ratio of 3 or greater, which in the judgment of the operator could possibly be asbestos. Reported as fibers per mi I IiIiter. 3) Total Dust - Any fiber or particle present. Reported as million particles per cubic foot. INTERPRETATION The regulations have been established with the 5 fiber limit on a time-weighted average. This essentially means the figures must be arranged to show an employee's average intake of fibers per milliliter on an 8-hour day. For example, the highest reading in the test was 3.6 fibers/ml. If this was the only contact with asbestos that day, the 2-minute sample would be extrapolated to 8 hours, giving a timeweighted average of less than 0.02 fibers/ml. SUNWARY OF DUST COUNTS N.B. No. Description 1929-64- EnvironmentaI - Bagging area, 3 ft. from operator (8 min.) at fill and dump area. 1929-64-2 EnvironmentaI (2 min.) At loading hopper during shaking of a load of dry mix. 1929-64-3 Persona I' (2 min.) Operator dumping Mica into loading hopper. 1929-64-4 Persona I (2 min.) - Operator dumping 2 bags 7RF9. 1929-64-5 EnvironmentaI In office on top of file cabinets. "Possible" Total Fiber Asbestos Count Count Fibers/mlpr 5 A Fibers/ml-?' 5/* Tot: Du mpo 0.9 2.6 8.: 3.4 6.8 0.: 0 82.5 51. 3.6 16.0 18. 0.4 0.8 2.1 I AIRBORNE DUST COUNTS for TAPE JOINT COMPOUNDS December 8, 1972 Personnel Present: E. J. Kleber Union Carbide Corporation J. E. Walsh Union Carbide Corporation UNION CARBIDE CORPORATION Mining and Metals Division Niagara Falls, New York Description of Plant and Tests Tests were conducted October 30, 1972 at manufacturers of tape joint compounds Asbestos is added at a hopper which has an overhead, negative pressure hood. Personal samples were collected from both.the man dumping asbestos and his assistant, handing him the bags. A personal sample was also obtained during the dumping of mica. An environmental sample was placed near the dumping area and allowed to run for approximately one hour. Sampling and dust counting were carried out in accordance with OSHA Regulation 1910.93a, using the Bayer, Zummalde and Brown method for counting asbestos fibers by phase contrast microscopy (Bureau of Occupational Safety and Health, Feb. 1969). Battery powered air pumps (M.S.A. type) calibrated to 2 liters per minute were used to collect personal breathing zone and environmental samples on millipore membrane filters of 0.8 micron porosity. Fiber counting was performed on a Leitz microscope utilizing phase contrast illumina tion at 400X and a Patterson Globe and Circle reticle. Total dust was determined by light field microscopy- at 100X. Test Results Two figures have been reported for each sample. They are: 1) Total Fiber - Any material 5 microns or longer having an aspect ratio of 3 or greater. Reported as fibers per milliliter. 2) Total Dust - Any fiber or particle present. Reported as million particles per cubic foot. Interpretation The regulations have been established with the 5 fiber limit on a time-weighted average. This essentially.means the figures must be arranged to show an employee's average intake of fibers per milliliter on an 8-hour day. For example, the highest reading in the test was 8.0 fibers/ml. If this was the only contact with asbestos that day, the 2-minute sample would be extrapolated to 8 hours, giving a time-weighted average of less than 0.04 fibers/ml. N.B. No. 1929-48-1 1929-48-2 1929-48-3 1929-48-4 SUMMARY OF DUST COUNTS Description Fiber Count Fibers/ml. > 5 u. Environmental - "Background" sample near filler bins on (81 min.) ladder 15 ft. from bag hopper for small raw material ingredients. .1.7 Personal (2 min.) - Operator's assistant handing bags to man who dumps. 6.2 Personal (2 min.) - Operator dumping 2 bags 7RF9 and 3 bags SG-210 8.0 Personal (2 min.) - Operator dumping 7 bags Muscovite mica 3.6 Total Dust mmppcf 2.8 6.9 10.1 13.8 /E. J. Kleber CC: . T. V. Norris H. B. Rhodes W. C. Taurder KC Files NF Files REPORT OF CALL Niagara Falls Chicago Niagara Falls NY BS jaria. *S9TT*&3 UNION CAF3IDE CCRFCRATIOM P.O. Box 579 Niagara Falls, N.Y. 14302 By P3te J. E. Walsh 8/7/74 Fu11 Mams Georgia Pacific Address Marietta, Georgia - Mfrs. of Tape joint muds 1 ntervi e.:ed Bob Favero, Plant Manager George Fowler, Tech Service Call made on SG-210 carload account to'run a dust count. GP's mud business is way down, according to Bob, as they are now running only one shift as compared to three a year ago at this time. The carload we are shipping this month is the first since May as they now have only a 5-6 order backlog to work on compared to a 4-6 week backlog last year. An asbestos warning sign now greets you as you enter the plant, and Bob showed me the warning stickers they now put on their redi-mix cans. He also showed me some dry mix vinyl topping compound with "asbestos free" in big letters. Right now it is shipped into the Chicago area only, he said. George and I got into an interesting discussion re why they couldn't use an all 210 mud formula. George knew of no reason other than, maybe, we hadn't pushed at Tigard. After reviewing the economics now since the latest Canadian in crease, it looks like we could save them 1 2/3<?/lb before figuring in the cost of limestone to make up the volume. George said his lab is all set up now, and he was going to whip up some all 210 muds, and if they are favorable, send a report to Tigard. He seemed interested in doing the work here because if it is workable, he could pick up some "brownie points" based on the amount of money he could save them. EJK The dust samples taken were as follows: #1-41 on 10:25 A.M. off 10:30 A.M. Personal sample attached to operator, Larry James, during the addition of 212 lbs of Carey 7RF-9 and 87$ lbs of SG-210. #J-15 on 10:30 A.M. off 10:37 A.M. Attached to operator, Larry James, during the addition of the following ingredients to complete the makeup of all dry materials in the batch: muscovite mica 350 lbs, Gelvatol 20 lb Natrosol 37^ lbs, Calgon T 12^ lbs, Troyson 5 lbs. #H-17 on 10:51 A.M. off 10:58 A.M. repeat of sample l-4'l on the next asbestos dump. RSPQRT'OF CALL - J. E. WALSH Page 2 #1-17 - on 10:58 A.M. off 11:02 A.M repeat of sample J-15 on the next batch of other dry ingredients dumped. EJK Please phone me the results before mailing the report to Favero. JW Follow up O', next call with Fowler re his all 210 mud work. ASBESTOS COUNT RECORD SHEET SAMPLE #_ FLOW______ 7^ time OPERATION VOLUME / y INITIALS^ F. AREA BLK.CNT.AV. AV.COUNT_ COMMENTS: / SAMPLE y DATE INST. /2 36 TOTAL TIME FLOW RATE BLANK ..... 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J G 3 a 32 G s 5C2 1 < fN i N <1 > 's. 3 cs 3 ( 3s > i G5 & 0 <3 l 1 ' 0 *& s <v) > c\ (N 1 m cc s 1520 ----- 25- X CO oOXO \ LU cc % (o3J CO o 'O. CD CO < OO O -- CM < Q CD X CO Q CaoC LU CC < DC UJ O<3J COL co O =fc X2 <C CO o C_> CM ASBESTOS COUNT RECORD SHEET K ASBESTOS COUNT RECORD SHEET I ASBESTOS COUNT RECORD SHEET ASBESTOS COUNT RECORD SHEET uj' LLi V X'V` CS<L 2O-l CO Ll. 2lS n ^$3 Cfl-, r< i i aastsf $3' Vi /NfN r* 3 A2 CI1 FS> ) fc> h ir $ IA O2 o CM '-1 3I<2 M lfI\ CM ASBESTOS COUNT RECORD SHEET jj ASBESTOS COUNT RECORD SHEET I ASBESTOS COUNT RECORD SHEET 'be > < N Iz- 3 _l o >2 O _ml <cr LQOU. o Q< ASBESTOS COUNT RECORD SHEET til <Q \ *^7 <S~ LU o c oc LU CoL 0 N =fc C<sL: l/) 3o--i Lu OOo -- CM h i </4-2l -ran DESCRIPTION OF CONTROLS: I 1 -- ' 5 5 ) 9 *) i U" in IT\ CN4 Cr O -- O CM AIRBORNE FIBER COUNTS for Georgia-Pacific Corporation Marietta, GA August 21, 1973 Present for Georgia-Pacific: Mr. D. Jones Present for Union Carbide Corporation: Mr. J . E. Walsh Samp 1es Analyzed By: Mr. E. J. Kleber UNION CARB DE CORPORATION Mining and Metals Division Niagara Fa Is, New York DESCRIPTION OF PLANT & TESTS Tests were conducted August 21, 1973 at Georgia-Pacific Corporation Marietta, Georgia, manufacturers of Tape Joint Compounds. Personal breathing zone and environmental samples were collected in an effort to determine the amount of airborne asbestos fiber generated during the manufacture of Joint Cements and during unloading of a car of SG-210. Samples are described in the Table. Sampling and dust counting were carried out in accordance with OSHA Regulation 1910.93a, using the Bayer, Zummalde and Brown method for counting asbestos fibers by phase contrast microscopy (Bureau of Occupational Safety and Health, Feb. 1969). Battery-powered air pumps (M.S.A. type) calibrated to 2 liters per minute were used to collect personal breathing zone and environmental samples on millipore membrane filters of 0.8 micron porosity. Fiber counting was performed on a Vicker's phase contrast microscope utilizing a Porton reticle for sizing and field definition. TEST RESULTS Two figures have been reported for each sample. They are: 1. Total Fiber - Any material longer than 5 microns having an aspect ratio greater than 3:1. 2. Probable Asbestos Fiber - Any material meeting the criteria in No. I which in the judgement of the operator could possibly be Chrysotile fiber. Sample No- 1 Field No 1 10 2 221 3 218 4 212 5 269 6 292 7 207 8 145 SUMMARY OF FIBER COUNTS Description Tota I F i ber Fibers/cc 5 ProbabIe Asbestos F i b :r Fibers/cc >5-*t Environmenta1 - Located 5 ft. off floor and 2 ft. to (10 min.) the left of dry blending through. Monitored between batches. 0.7 0.4 Persona 1 (5 min.) - Dry blender operator (Sam Gayton) during addition of 200 lb. 7RF9 and 90 lb. SG-210. Environmenta1 - Same position as No. 1 during addition of (15 min.) 200 lb. 7RF9 and 90 lb. SG-210. 22.2 3.9 16.7 1.5 Persona 1 (12 min.) - Dry blender operator (Sam Gayton) completing batch with other dry ingredients such as Mica, etc. 3.6 0.6 Environmenta1 - Same position as No. 1 between batches. 2.2 0.2 (16 min.) Persona 1 (II min.) - Wet mix operator (Robert Huie) during blending of dry ingredients with Latex and water. 3.5 1 .9 Environmenta1 - Located 12 ft. from floor in middle of car (75 min.) door opening. Monitored from time door was opened until completion of unloading. 2.0 1.5 Persona 1 (87 min.) - Car unloader (John Tiaker) during entire un1oading. 2.7 2. 1