Document 6wnbzmw2zYga9Xyv5v12yXzoo

file copn Leva.. Hawes. Stmivoton. Martin 6c Oppekheimer I ft CONNECTICUT AVCNUC.M.W.. WiJHINCTON, O C. *OOOB TCue*NONC>(io*> i*>o02o ca*lc> roicx wu teics. Aft-ano Nlk*l uoto iTNiNtei fHANl M. S(NNClH(ll jOnn O >CU(* 0*C*T MilllN eMAio ut>c<i U*TC* I. *N UtlHAU AIL MIC~4.NO IHllIUAH NMTC*N ftOAmMoNrCr* *'CC micmacl August l4, 1974 VAO|hCn*ANO.OACOam.)MiwC! COvMtCk THOMAI M. kCW#CC kcnnCTm 4. leHftNta fji.AOVAIfAt RC. fOvHK*KH$OftNMK kOwtU O.TuAhftukl. JAMCI T. 0AAV9C RIAN a. ORUCOLl Mr. Julius Jimeno Occupational Safety and Health Administration Department of Labor 1726 M Street, N. W. Room 200 Washington, D. C. 20210 Dear Mr. Jimeno: Unclosed are the following submissions of General Cable Corporation for the record of the hearings on vinyl chloride: 1. Copies of studies surveying the levels of vinyl chloride at four General Cable plants that use poly vinyl chloride. Except for one reading, all breathing zone samples disclose vinyl chloride concentrations less than 1.0 ppm. The single exception was reported from a sample taken at the Bonham Plant. "Grab samples" taken at points of suspected concentrations ran as high as 3.4 ppm. None of the "grab samples" are from areas in which employees regularly work. 2. Letters from the B.P. Goodrich Chemical Company and Tenneco Chemicals indicating that the availability of FVC to General Cable could be severely affected by the proposed standard of "no detectable level." This submission satisfies the requests for the record made by General Cable Corporation in its testimony at the hearings. 23559001 Enclosure BFG26299 Gr^r^ P. CI.v;mm .V 20711 Scu;Mi.i '2 n-Md, Southfield, Michigan 48075 Telephone: 313 424-8360 for L-.'iur mviiunr.irnt June 1C, 197A ' !^3 3l5: i Hr. Henry F. Urban Director of Safety General Cable Corporation SOC R&hx/ay Avenue Union, New Jersey 07083 Dear Mr. Urban: Presented herewith is a report, submitted in triplicate, sucr.arliing the results of the industrial hygiene survey conducted at the Memphis, Tennessee facility on May 16, 1574 by Mr. Michael S. Mosher of our staff. In summary, on the basis of analysis of a total of sixteen general area and personal breathing zone sacples collected in representative areas of the extrusion plant, there was no evidence of a potential health hazard associated with exposure of employees to vinyl chloride. Concentrations of vinyl chloride were less than the limits of detection of the sampling and analytical ncchodology (0.04 ppm or less) in all areas evaluated. It has been a pleasure to be cf assistance to you on this project. Please contact us if you have questions concerning any aspects of this report. Z006SSC RDS/pe linclosures O a O-.. i-c BfG26300 *0 INDUSTRIAL HYGIENE SURVEY GENERAL CABLE CORPORATION KENPHIS, TENNESSEE INTRODUCTION M A M Protection Consultants retained George D. Clayton & Associates to conduct an industrial hygiene survey of the General Cable Corpora tion extrusion plant located in Memphis, Tennessee. Purposes of this study vere to determine concentrations of vinyl chloride to which workers were being exposed and to interpret the results in terms of potential health hazards, with particular reference to regulations promulgated under the Occupational Safety and Health Act of 1970 and other accepted standards of good practice within the field of occupational health. Results of the survey, conducted on May 16, 1974 by Mr. Michael S. Mosher of Clayton & Associates, are reported here In. DESCRIPTION OF OPERATIONS The General Cable Corporation employs approximately 100 people at their Memphis, Tennessee Plant in the manufacture of extruded wire products incorporating polyvinyl chloride (PVC). Raw PVC is mixed with dibasic lead phthalate in a dry blend room, which is a regular work station for only one man. An exhaust hood is used at the weigh area but there is no local exhaust ventilation where the lead is dumped into the hot (250*F) mixer with the PVC. The mixture is then transfered from the hot to the cold (room temperature) mixer, from which the mixture is transfered to bins by means of a conveyor. The mixed PVC is allowed to free-fall from the end of the conveyor into open bins. The extruders, which are fed from the bins containing polyvinyl chloride by a pumping mechanism, operate at approximately 425F. Metal wire is pulled through the hot extruders and then through a water quenching operation in a trough located within a foot of the extruder head. From the end of the trough the coated wire is wound and packaged. The regular domestic sources of PVC were in use during the survey. DISCUSSION OF POTENTIAL HEALTH HAZARD ASSOCIATED WITH EXPOSURE TO VINYL CHLORIDE Vinyl chloride Is a gas at standard conditions. Until very recently the material was considered to be much more of a fire and explosion hazard than a health hazard. Although vinyl- chloride was known to be anesthetic at relatively high concentrations (16,000 ppm) there was no evidence of a significant hazard associated with exposures of workers to concentrations normally encountered in industrial situations of manufacture and use. BFG26301 23559003 -2- * **' Howcver, in January, 1974 , the 8. F. Goodrich Company rep< ted that four of their employees at. the Company's plant in Louisville Kentucky, had died of liver angiosarcoma, a cancer apparently re_ latcd to their past exposure to vinyl chloride. As a result 0f this report and subsequent investigations by the National institute for Occupational Safety and Health and the Occupational Surety and Health Administration, the acceptable limit for concentraliyns of vinyl chloride in air to which workers could be exposed um reduced by an emergency temporary health standard established by the U.S, Department of Labor on April 5, 1974, from a ceiling of 5<n> ppm to a ceiling of 50 ppm. Continuing studies with animals, and comprehensive ep idemi .< i ogical studies of vinyl chloride and polyvinyl chloride workers, indicate that exposure to concentrations as low as 50 ppm arc capably of producing adverse effects. Accordingly, Che U.S. Department of Labor has proposed a permanent health standard limiting vui-i(er exposures to "no detectable level" using methods capable > r measuring one part per million with an accuracy of plus-or-minus 50 percent. S ' SAMPLING AMD ANALYTICAL METHODS ?' , Air sampling conducted during this study was of two basic lypes: general area and personal breathing zone. For both types, samples were collected by drawing air through small glass tubes, packed with activated carbon, at a measured flowrate by means of small battery- operated pumps (Mine Safety Appliances Company, Model G) . The general area samples were collected at stationary slton strategically located through the work areas. The personal breathing . zone sampling units were worn by the workers; the pump wau attached to the belt and the sampler head (activated carbon tube) v,,a attached on the outside of the worker's shirt in the approximate bvoahing zone. Thus, these latter samples were representative of the con ditions to which the worker was exposed during the sampling period. After collection of the sample, the glass tubes were sealed with small plastic caps for transfer to the Clayton & Associate/! labora tory. All samples were analyzed subsequently using gas chromato graphic techniques. These analytical results, in conjunction with the sampling data (air flowrate and duration of the sampling to . yield the total volume of air sampled) were used to calculate the corresponding concentrations of vinyl chloride in terms of parts of vinyl chloride per million parts of air, by volume. r PRESENTATION OF RESULTS The results of the vinyl chloride sampling in the personal breathing zones and general areas of the operation are presented in Tables I and II, respectively. Examination of these data shows that no detectable amount of vinyl chloride was observed in any of the samples collected. The limit of detection for the combined sampling aod analytical methods was 0.04 ppm, or less. / BFG26302 3- CONC LUSION On the basis of observations and measurements made during this survey, it is concluded that the concentrations of vinyl chloride to which workers are exposed during the course of routine operation of the plant are within acceptable limits. In all areas. Concen trations were less than 0.04 ppm, considerably less than the cur rently acceptable ceiling concentration (SO ppm) established by the II.S . Department of Labor's emergency temporary standard and the proposed permanent standard of one ppm. This report Michael S. Mosher, Industrial Hygienist S006SCCZ BFG26303 plant TABLE I GEORGE D* CLAYTON & ASSOCIATES General Cable Corp. INDUSTRIAL HYGIENE SAMPLING SUMMARY Memphis, Tennessee______________ Material Vinyl Chloride 1974 Date S ample No. 5/16 .5/16 5/16 5/16 5/16 5/16 5/16 5/16 VC-1 .VC-2 VC-4 VC-6 VC-8 VC-9 VC-13 VC-14 Description EXTRUSION LINE OPERATORS1 PERSONAL BREATHING ZONES Line Number 13, Rusr.cll Freeman Line Number 12, Leo Stevenson Line Number 11, Ken Sultzbach Line Number 8, Packager. Jerry Grev Line Number 12, Elrov Youne Line Humber B, Jerrv Slrmonn Line Number 10, Charles Hugger B-Linc p Charlcv Oliver Sampling Per loti Samp 1e Weight Start Stop 9:11 12:33 9:14 12:34 9:28 13:12 9:43 13:23 11:16 13:27 13:07 15:32 14:05 15:27 14:08 15:30 Samp 1e Volume liters Concentration Vinyl Chloride ppm 162 <0.02 170 <0.02 190 <0.02 143 <0.02 105 . <0,02 123 <0.02 57.4 <0.04 65.6 <0.04 Acceptpblc.cclline concentration (OsIIA) Emergency Temporary Standard promulgated nn April 5, 1974 ----------<-- -- 50 BFG26304 C DC - l 9 I General Cablo Corp. Plane Memphis, Tennessee TABLE II GEORGE D. CLAYTON & ASSOCIATES INDUSTRIAL HYGIENE SAMPLING SUMMARY Hatcrial Vinyl Chloride 197 A Onto Sample No. 5-16 5-16 VC-3 VC-5 Sampling Period Samp 1e Weight Description Start STATIONARY area SAMPLES Work Station Detween Lines 12 and 13 PVC Feed Din to Line Number 11 Apprortlnato.lv__1.0 Eq.oJl.Ecj}JR Opening 9:16 9:33 Stop 12 :3 G 13 :13 Samp 1e Volume litero Concentration Vinyl Chloride ppm 140 `198 <0.02 <0.02 5-16 VC-7 Over Control Panel on Lino Number .1,2 ,, ApnroxJ mn.tely, .3 Feet Above Extruder 9:55 13 : 26 222 <0.02 5-16 VC-10 5-16 VC-11 5-16 VC-12 5-16 VC-15 5-16 VC-16 Approximately 2 Feet Above T.-fne Number ft F.vrnirler 13 :10 Southwest Corner of Scrap Room, N e a r . P.o w o r Switches 13:21 Above Control Dox In Dry nl.ond,, M.wtr Center nf .Room L4 : 00 Approximately 1.5 Feet From Frttr.iid or* on Mne Number Q L4 :17 Approximately 4 Feet From llunber.-12.-Lin c-Extruder.,----------- L4 :30 Above Control Panel 15:41 15:47 15:50 15:57 15:59 90,6 <0.03 117 <0.02 105 <0.02 105 <o;o2 79.7 <0.03 Acceptable Ccilinc Concen tr.iM.on fOSUAl ' -- 50 BFG26305 . GDC- 19 Emergency Temporary Standard Promul.3AtLfid.-Qj\..Ap.r.lJL. 5_^_3J)Z4 35*45 WtKIiiic Los Anydcj, G\ 900 JO 2131 362C111 July 12, 1974 Mr. H. F. Urban Director of Safety General Coble Cornoration 800 Rahway Avenue Union# New Jersey 07083 . Dear Mr. Urban: The attached reoort is a result of the studv I conducted at the Lindsey, California and Parser, California slants on June 12 and 13, 1974 to evaluate the significance of airborne exposures to vinyl chloride at these olants. The results essentially confirm our earlier prediction. I hope this report will he useful to vou. Please do not hesitate to contact re if you should have any questions. Sincerely, AJXJViCAM MOTORISTS INSURANCE CO!!PA17Y Richard E. Dolliver Industrial Hygienist cc/ V?. Stuart -- Lindsey V. Summers -- Lindsey R. Patton -- Sanger BFG26306 FOR GENERAL CABLE CORPORATION lindsey, California SANGER, CALIFORNIA 1 this report is a result nr rr;in juue 12 - 13, 1074 study to determine the presence/absence or significant "iv.vl chloride exposure ldcw during pvc (poly vinyl chloride.) wi^e covFnnio/ extension operations. the study was conducted on nvccnssxwE DAYS AT THE LINDSEY, CALIFORNIA AND PANGE", CALIFORNIA PLANTS. STUDY rr.ntLTS: SUMMARY: AIR SAMPLES COLLECTED DURING THE O^ENIMG OF FREEH JK1XHG PVC PELLETS (NEON) AT THE LXHDSEV PLANT AMD AT THE BOTTOM OF A PVC STORAGE SILO AT T1!E RANGHR PLANT DETECTED VIMYL CHLORIDE CONCENTRATION IN EXCESS OF I nnn {PARTS pep MILLION) AT THESE SOURCES, ALL SAMPLES COLLECTED 111 ROUTINE PRODUCTION A.EEAS FOUT'D VINYL CHLORIDE CONCENTRATIONS LESS TEAM 1 ppn. A TOTAL OF .26 AIK SAMPLES ME PE COLLECTED FOR THIS STUDY: OF THESE, 22 WERE COLLECTED OVER. A CONTINUOUS (47-R2 MINUTE) SAJiPLE PERIOD (TIME AVERAGED) AND FOUR (4) MERE "GRAB: (SHORT PERIOD) SAMPLES, FROM A LIMITED CO?<PA?.ISO>T OFFERED 3Y TWO SETS OF SAMPLES, GRAB" SAMPLE RESULTS APPEAR TO BE AEOUT FOUR (4) TI1T.S GREATER THAI! THE RESULTS OBTAINED FP.OM "CONTINUOUS" SAMPLING. NO COMCLUS10!15 CAN BE MADE CONCERNING THE DIFFERING RESULTS. AT THIS TIMS. (PLEASE REFER TO THE DISCUSSION) NOME OF THE 22 CONTINUOUS SAMPLES DETECTED CONCENTRATIONS CF VINYL CHLORIDE GREATER TEAM 0.27 nnn, THESE SAMPLES REPRE SENTED POTENTIAL REAR CONCENTRATION AREAS SUCH AS THE THROATS OF PELLET PEED HOPPERS AND NEXT TO THE EXTRUDER HEADS, AS NELL AS THE ACTUAL 3PXATHIHG ZONE OF OPERATING PERSONNEL. THREE OF THE FOUR "GRAB" SAMPLES FOUND VIMYL CHLORIDE CONCEN TRATIONS GREATER THAN 1 n^n: SAMPLES COLLECTED JUST ABOVE THE SURFACE OF FRESHLY OPENED*BOXES OF PVC PELLETS (GEON 80534) AT THE LINDSEY PLANT VIE Pi; 2.0 AND 3,4 Don RESPECTIVELY. THE THIRD "HIGH" SAJIPLE (1.1 non) WAS COLLECTED AT THE 30TTOM OF A PVC PONDER STORAGE SILO AT THE SANGER PLANT. (THIS LATTER P.VfPLE COMPARED TO A CONCENTRATION OF 0,27 Ppn OBTAINED FROM "CONTINUOUS" SAMPLING.) THE FOURTH "GRAS" SA>!PLE,' COLLECTED AT THE WIRE LINE EXIT FRO!*. THE HEAD OF AN EXTRUDER, DETECTED 0.5 4 pnn VIMYL CHLORIDE AS COMPARED TO 0.13 pnm FPOM A CONTINUOUS SAMPLE. DETAILED RESULTS OF THE AIR SAMPLING CAN BE FOUND IN THE TABLE AT THE END OF THIS REPORT: RESULTS FROM THE LINDSEY PLANT ARE IN TABLE I, RESULTS FROM THE SANGER PLANT ARE IN TABLE II. (CO:iT*D. ON PAGE 2) 23559009 BFG26307 PXCOM? JTNRATIONS: ALTHOUGH NO SPECIFIC RECO.'UE'NDATIONS API: BEING SUBMITTED AT THIS tike, intention should re given to the tvio apxas (the opening or fresh boxes or ravj rvc pellets mid at the pottos, of pvc stora.ce SILOS) UJIEPX PXLATIVL'LY HIGH LEVELS OF VINYL CHLORIDE WERE DETECTED. EQUIPMENT h STUDY pnoCEDDPXS: TIME AVERAGED (CONTINUOUS) SAMPLES FOR VINYL CHLORIDE HERE COLLECTED USING SAMPLE TUBES FILLIP WITH ACTIVATED CARBON/CHARCOAL. A MSA MODEL C PUr5P, WITH A MODIFIED FLOVJ PATE OF 0.1 Inn (LITER PER MINUTE) OR LESS UAS USED AS A VACUUM SOURCE. FLOU RATH HAS ''REIFIED RCrOP.E AND AFTER EACH SAMPLE USING THE INVERTED BURETTE (100 nl) - SOAP BUBBLE TECHNIQUE. GRAB SAMPLES ME PE COLLECTED IN 250 r.l SAMPLE TUBES PROVIDED AT EACH FED WITH TEFLON STOPCOCKS. AIR VJAS PPA.V7N INTO THE SAMPLE. TUBE USING THE MSA MODEL G PU?iP UNTIL A PXPRESS: ITATIVE SAMPLE UAS OBTAINED. THE LOCATIONS OF AIP. SAMPLES WERE FREOl'EHTLY SELECTED IN ATTEMPTS TO FIND THE PRESENCE OF NIGH CONCENTRATIONS OF VINYL CHLORIDE, RATHER THAN TO SIMPLY DETERMINE ACTUAL UOPXER EXPOSURES. ALL SA!'.PLUS I7EPX ANALYSED IN THE LABORATORY USING HYDROC-EN FLAME DETECTION OAE ' Cl!EOMATOSPA-PHY TECHNIOUES. THIS TFCHNIOU?: IS OUITE SENSITIVE TO VINYL CHLORIDE, BUT "EXACT" DETERMINATIONS .AFX NOT POSSIBLE AT THE SMALL LEVELS OF VINYL CHLORIDE AS FXCORDED IN THIS * STUDY AND THUS THE NUMERICAL RESULTS ARE SUBJECT TO STATISTICAL VARIATIONS. DISCUSSION: WHEN EVALUATING THE RESULTS OF THIS STUDY, IT SHOULD BE PJNTYXERTD THAT THE TYPES OF RAN PVC USED BY THE EXTRUDERS MAY EFFF.CT THE DETECTABLE AMOUNT OF AIPXOP.NE VINYL CHLORIDE. IN REVIEUINO THE ATTACHED TABLES, A TENDEjJCv FOR HIGHER DETECTABLE VINYL CHLORIDE LEVELS IN THE SANGER PLANT THAN IN THE LINDSEY PL/Y'T ARE 0DSEP.'T:D. A.T THESE SMALL CONCENTRATIONS, AND NIT!'. T:1E POTENTIAL FOR PXLA.TI'HLY HIGH STATISTICAL DEVIA.TIOM O'7 ANALYTICAL RESULTS, THE SIGNIFICANCE OF THE DIFFERENCES IN THE THO PLANTS 7PPF-AF-S TO P#K QUESTIONABLE: ALTHOUGH A DIFFERENCE IN THE TYPE OF PVC USED IN THE TUO PJ.AHTS IS A POSSIBLE EXPLANATION rOR THE SLIGHT INCREASE, THE PVC PELLETS USED IN THE SAMCER PLANT ARE PART OF A BLEND PREPAPEP IN THE PLANT AND MOULD SEEMINGLY CONTA.IM LESS TRAP VINYL CHLORIDE CAS THAN "P.AW" PELLETS. SAJC'LE RESULT DIFFERENCES ARE NORMALLY EXPECTED EFTVTEN GRAB AND tut: AVERAGED (CONTIN'UOUS) SAMPLES because OF THE nature of the TWO TYPES OF SAMPLING: THE ORAN SAMPLE CAN BE COLLECTED A.T THE PRECISE TIME A PEAK (MICH) POP. "''ALLEY" (LOU) CONCENTRATION EXIST VJHEPJ'AX THE CONTINUOUS - TYPE SAMPLE MOULD AVERAGE THE HIGHS AND THE LONS. USUALLY, HOWEVER, THE PANNE IS NOT AS EXTREME FOP. SAMPLES COLLECT'D TO EVALUATE VJHAT THEORETICALLY WOULD BE A. RELA TIVELY CONSTANT SOURCE (THE BOTTOM OF THE SILO AND THE EXTRUDFR (CONT* D. PAGE 3) ^ 3553010 BfG26308 head) . STUDY. the DiFFEPJuicns iri the ti/o types of samples art icon under air sampling was deItIeved to re pJvPRrsrj'TATivE of the lindsey PLANT OPERATIO'iS. AT THE SANGER PLANT, !!0WEVEIY, 110 SAMPLES UPPE COLLECTED AT THE "rTRRLIHF-" ARD THREE - IITCH EXTRUDER AS DOT'! WJRE HOT OPERATING AT THE TTHr 07 THE STUDY. Ill ADDITION, NO S/tMPLES V7ERE COLLECTED WITHIN THE ELENPING ROOM AT THE SANGER PLANT AS THE "RAH" PVC IS ADDED UNDER NEGATIVE SYSTEM PRESSURE (VJITJJIN THE MIXER.) AND AIP.EOPHE DUST 01! THE MIXING rLA?rOP.M WOULD PROBABLY EFFECT THE MODIFIED LOW SAMPLE PLY.) PATE. RESPECTFULLY SUBMITTED, AMERICAN MOTORISTS INSURANCE COMPANY . ^Lm^ssSUl^ RICHARD E. DOT-LIVER INDUSTRIAL HYGIENIST The- investigations which form the bt:a of feport were inede ia accordance (T?ith gcnftfcUj Accepted. Industrial hjrgiene practice end vecn liisitaJ tothote condition emptying toch attf/ng procedures and tceasvnbg devices, if any, nWeiJ herein. The report does oot purport to Ttfct to r guarantee compliance with local, ttafe itdutX TegcUiions which xaij to applicable <VGfth; coodiooav BFG26309 GENERAL CA.DLE CORPORATION I.II JDSEY, CALIFORNIA TABLE I or Ain nonresults sampling vinyl chlopide SAMPLE NO. LOCATION (TUT.) OF SAMPLE RESULTS (PP1*) 2h - inch extruders C-122 C-123 C-124 AT WIRT LIME EXIT FROM HEAL OF EXTRUDER ? 301, USING COMPOUND . $ 80644, GEOM (BFG) . (12147-13:'42) . SAME AS ABOVE, (14:35-15:27). SAftC AS ABOVE, (14:27-13:17). 0,17 G.09 0.05 C-125 C-126 * C-127 AT HOPPER THROAT OF EXTRUDER g 301* (12:40-13:40). SAJiE AS ft C-125, (14:38-15:28) 0.04 0.12 AT COLOR METER THROAT OF EXTRUDER, ft 304, USING COJTOUND # 80644, GEON (RFG). (14:05-15:01). 0.04 C-128 GENERAL APEA - APPROXIMATE RRRATHIHG ZONE HEIGHT IN PAY-OFF OF EXTRUDER .* t 302. (15:36-16:23) . 0.07 C-129 C-130 BREATHING ZONE OF OPEPATOR (3.S.) OF EXTRUDER # 301. (13:17-15:52). BREATHING ZONE OF. OPERATOR (E.T. ) OF EXTRUDER. 303. (16:14-17:14), * 0.07 0.04 -C-131 C--132 SWISS AREA .* AT WIRE LINE EXIT FROM HEAD OF SWISS $ 327. (15:51-16:4?). AT WIPE LIUS EXIST FROM HEAD OF SWISS # 326. (14:20-18:10), 0.05 0.11 C-133 GENERAL AREA - APPROXIMATE BREATHING SOUr* HEIGHT REAR HOPPER. OF SWISS e 326/327. (15:51-16:49). 0.08 C--134 C-135 BREATHING ZONE OF SWISS LINE OPERATOR (A.L.R.). (16:20-17:22) nheathj.?'.g noun of second snips LINE OPERATOR (A.N.). (16:21-17:21). 0.11 0.09 RAW 'MATERIALS C-136 C-137 tAAMm | "GRAB SAMPLE" - FRESHLY OPENED BOX OF GEON 80534. SAMPLE COLLECTED ABOUT TWO (2) INCHES ABOVE PELLETS, WITH TELLECS AGITATED DURING ' ' SAMPLE PERIOD. -. "GRAD SAMPLE" - SECOND BOX OF FRESHLY OPENED GEON 80534. COLLECTED AS ABOVE, BUT WITHOUT AGITATION OF PELLETS. 2.0 3.4 2 3 5 5 9 0 L2 BFG26310 TJTTT77rrm CTUlT'n ai PAGE 2 NOTE/?: 1. ` THE CURRENT "EMERGENCY STANDARD" TOR VINYL CHLORIDE IS so pp.m, however., thin level ir generally considered nv mjsdical exppets to he excessive, a "no detectable level1:, OR OME PART PER MILLION (1 PPM) "LOWEST DETECTABLE LEVEL" HAS BEEN PROPOSED AS AN APPROPRIATE PERMANENT STANDARD, 2. .SAMPLE 122-135 V.TEE COLLECTED TOR A CONTINUOUS PERIOD ON ACTIVATED CAEDOH/CHARCOAL. SAMPLES 13^-137 \T.pE "GRAB SAMPLES" COLLECTED OVER 'A BRIEF PERIOD III 250 nl GLASS COLLECTION TUPES. 3. ALTHOUGH THE SAMPLE RESULTS API' SUBJECT TO A RELATIVELY LARGE RANGE FLUCTUATION (STANDARD DEVIATION) , THE SHALL VALUES DO INDICATE A DETECTADLE QUANTITY THAT, AT A HIGH CONFIDENCE LEVEL,. IS HELL DELOVJ 1 PPM. BFG26311 Griir.nAi, carle corporation 75AHGHP., CALIFORNIA m/IUi *- f Ay / TABLE IX RESULTS OF AIR SAMPLING FOR VIHYL CHLORIDE' SAMPLE HO. LOCATION (TIJT) OF SAMPLE RESULTS ( C-138 C-139 AT WIPE LIME EXIT FROM HEAD OF EXTRUDER 4 103B (4Jj-IHCH), USING V-6103 'DRY BLEND. (10:33-11: 25). SAME AS ABOVE, (11:33-12:24). 0.06. 0.10 C-140 BREATHING SOME OF OPERATOR (J.C.) OF EXTRUDER t 103B. (11:00-11:55) 0.15 C-141 C-142 C-14 3 AT HOPPER THROAT OF NXTPUDF.P 4102 (2-IHCI!) , USING V-5137 GRANULES, (10:47-11:39). SAME AS C-l41, (11:54-12:45). AT WIRE LIME EXIT FROM HEAD OF EXTRUDER ? 102. (12:07-13:07). 0.20 0.13 C-14G "GRAB SAMPLE" - AT WIRE LIME EXIT FROM HEAD OF EXTRUDER 102. (12:40) 0.54 C-l 44 BREATHING ZONE OF OPERATOR (D.R.) OF EXTRUDERS 101 AND 102. <11:0612:08) . 0.21 C-145 C-147 NOTES: COLLECTED AT BOTTOM OF NORTH SILO. "GRAB SAMPLE" - COLLECTED AT BOTTOM OF NORTH SILO. 0.27 1.1 1. THE CURRENT "EMERGENCY STANDARD" FOR VINYL CHLORIDE IS 50 PPM, HOWEVER, this le'h:l is generally considered hy medical EXPERTS TO BE EXCESSIVE. A "HC DETECTABLE LEVEL", OP. ONE PART PER MILLION (1 PPM) "LOtJEST DETECTABLE LEVEL" .HAS BEEN PROPOSED AS AH APPROPRIATE PERMANENT STANDARD. 2. SAJ4PLES 133-145 WEPE COLLECTED FOR A CONTINUOUS PERIOD OM ACTIVATED CARBOM/CHA.P.COAL. SAMPLES 146-147 WERE "GRAB SAMPLES" COLLECTED OVER A BRIEF PEP.IOD III 250 nl GLASS COLLECTION TUBES. 3. ALTHOUGH TIIF SAMPLE RESULTS ARE SUBJECT TO A RELATIVELY LARGE PANfT. FLUCTUATION (STANDARD DEVIATION) , THE S!1ALL VALUES DO IHDICA.TF A DETECTABLE QUANTITY THAT, AT A HIGH CONFIDENCE LE'TEL, IS WELL BELOW 1 PPM. 235590M BFG26312