Document 1GZvqpmr3zQ4v4r996RoEZOo

E. I. du Pont de Nemours Company Wilmington, Delaware tewe cc: J. A. Sigman-Tex.Fib.-Wilm.* C. F. Reinhart/R.J.Hubiak-Hask.Lab R. L. Klausmeier ENGINEERING DEPARTMENT August 2, 1972 TO: - D. G. WINDSOR - CHAIRMAN - EMPLOYEE RELATIONS - WILMINGTON* L. C. SCHALLER - EMPLOYEE RELATIONS - WILMINGTON* D. J. BEATTY - CENTRAL RESEARCH - EXP. STA. J. E. BORDEN - POLYMER INTERMEDIATES - VICTORIA PLANT R. W. CALHOUN - TEXTILE FIBERS - SEAFQRD PLANT J. T. CAVANAUGH - PIGMENTS - EDGE MOOR PLANT H. LEWIS - PLASTICS - CARNEY'S POINT DEVELOPMENT LAB W. T. MUNCASTER - ELASCHEM - WILMINGTON P. A. PALMER - ESD A. J. MAJOR, JR. - ORCHEM - CHAMBERS WORKS B. J. STONE - DESIGN W. H. THOMPSON - F & F - PARLIN PLANT J. C. CONRAD - PHOTO PRODUCTS - PARLIN PLANT F. H. WHITAKER - DESIGN I. ZEISE - CONSTRUCTION* KARSH - STANDARDS SECTION STANDARDS SECTION - SAFETY tc FIRE PROTECTION SUBCOMMITTEE S4T - MEASUREMENT AND CONTROL OF ASBESTOS DUST EXPOSURE At the request of D. G. Windsor and J. A. Sigman, Engineering Standards Committee, we will resubmit S4T to the Engineering Standards Committee for comments and approval. We expect the masters to be corrected and serial letter issued by August 15, 1972. Copies of the marked standard showing the changes to be made are attached to the copies marked by asterisk for their information. CEM:kjk Attachment DUP 0902850 SC-DP-03810 s TOXICITY MEASUREMENT AND CONTROL OF ASBESTOS DUST EXPOSURE ISSUED SAFETY ENGINEERING STANDARD S 4 -4 Poga 1 of 1 n ss > u l*l 0 i- o z "J 0O w K 8? J < T v> 2 ? I CO 2w* o*' 0 r* LLl 0 11 > 0 tt 0 tt z -. 0 2 ui owh. wS0 u tr "o oz w5 ?S v-i ya *W* 7 20 Si 0I5 (A 0 II I oz Occupational Sofaly and Health Act of 1970 (OSHA)_o* published in the Federol Register.___ 1. SCOPE This stnndnrd presents the permissible exposure limits to asbestos dust, general information on method* of controlling asbestos dust exposures, and describes an acccplnhle method of sampling asbestos dust concentra tions in the work area. shnll he used to mirt the permissible exposure limits. see section 3. 2.5 Respiratory protective devices, shall be provided and used where such control methods are not feasible, or do not otherwise reduce the concentrations below the permissible exposure limits, see section 4. Z GENERAL Hygiene Requite nte*ts are me fucfc2 7n 2.1 Aibestosis ond lung cancer have long been assoch "C><>------ L ated with exposure to asbestos. Historically, the Incidence -- ~-w of these diseases has been significantly higher among asbestos workers than among thr general population. 2.2 Principal sources of exposure to airborne asbestos duel in Company operations ml? been: ' 2.7 Sampling. For sampling equipment, monitoring, a' nalysis record keeping, and warning signs, see lection 6. 2.8 Nonosbastos bearing molsrioti should be a. Cutting insulation by power saws in fabrication shops , substituted wReitf asbestos contributes to a dust concentration exceeding the permissible exposure limits. b. Opening boxes and removal of new insulation 3. CONTROL OF ASBESTOS DUSTS c. Removing old insulation from lines and vessels J.l Hondllng Asbaitos Insulation d. a. duties f. g. Mixing asbestos to form cement Removal of clothing after completing insulating Culling asbestos shingles, Transite, etc. Spraying insulation or fireproofing 3.1.1 Cartons of block insulation are a potential source of severe dust exposure and should be handled with care. The rough, abrasive nature of the block material creates dust within the cartons. </&tovmvA, "pen 3.1.2 Cartons of new insulation should b^openiaj, ) *<(. prior to removal of blocks^ 11* renvsvc dut f, h. fn^.vd'eaf >n Company products I, 3.1.3 Asheslos blocks must be handled with eare at all times (a mm, wise 2.3 Parmitiibl# Expotur* limits. Asbestos dust concen trations in air shall not exceed an 8-hour time-weighted average (TWA) of 5 fibers longrr than 5 microns per cubic centimeter (ec) of air. At no time may the concen tration exceed a ceiling of 10 fibers longer than 5 3.1.4 Purchase of block insulation with a glaze coating is recommended. Thia makes It virtually dust free for handling purposes. microns per ccjjThe 8-hour time-weighted average (TWA) is th^ivdrwge concentration occuring over a period of O CHMlImsIfiill Itnttf ) ' 3.2 Asbastps Cutting Oparations a..l Ait iioi.ii-irpcraicn or power-operated loots whieh may produce or release asbestos fibers in exrc*- 2.3.11 Alter July 1. 1976, thr TWA is rrduced from ol the permt-sihl' exjosiire limi's shnll lie provided with ." lo 2 fibers longer than !t microns per ee. a d*i*l rnlleeti-n system,[see .T.b. ? S .--ttontfol mslhofh, sjsh ns but not limited lo. enclo 3.2.2 All major powrr r'tt*'nf- machines should be sure, vfrwum fweep-ug. end local exhaust ventilation, i*nlitlrd in a sepnrttlr ssotking ntrn. ( "S ( 'd -----------1 rorflons in fsff ateef OSMA reputations, Sactlon 1910.93 | ` \\t S6 Vendors and merchandise destinations era ytvan to describe materials and may not Include alb occsptoblo products. Substitutions by suppliers are to bo modo only on approval of tho local authority Inltlotlnf tho uso of this ttondord. rjim'iPTh DUP 0902851 V- i . I T* ft^or\fOj[ J ItOLuSajk*** Idrn^tjjuttjj} Avf prv{-.d--c. )o iu t /jviA*-v^ ffp-uXLA r<-wwic( a--i/" UA.jj4t Uokicrr' ^"0 C<~ O K^Js\ AUQyt^gvU^ ^ ***"f^ "eft* 2i*U^- y--------- , , . 3.2.3 The work nrrn shall have n vncinim cleanup <1^ ?\nilily To empty hoppers without creating /syslrin. This can be a system of hosrs connected to a visible emissions of particulate matter central, vacuum system. All ports of the room must have daily vacuum cleanup of ledges, shelves, floors, and a. No lorn or ruptured hag* machines. -- I. No worn or threadbare hngs CAUTION; No dry swasping iholl ba parformad. Air hose is not to be used ns nn nid in cleanup. g. No improperly positioned hngs 3.3 AibaitoS'Camanl Mixing 4. RESPIRATORY EQUIPMENT 3.3.1 Asbestos cement, mortar, coatings, grout, and plaster shall be mixed in closed bogs or other containers. _______________________________ . 4.1 Rrspiralory protection shall be provided to nil' personnel in areas where the permissible exposure limits | jmay hr exceeded, Rrfcr to S2II for geaeral description of cqwy? nte^ctf; 3.3.2 Any dried-oul cement should be discarded. Do not attempt to rework it. 3.4 Removal of Asbestos Insulation 4.1.1 Atmosphere supplying respirators (Type "C" snpplird nir or self-contained). Rureau of Mines Schedule I I9B. will provide complete protection.] They are required for dismantling and spraying asbestos, Of when the jj+actaTixfion ait Q'WA or ceiling limit! of 2.3)*tie expected to ' -------- -- -- . 3.4.1 Insulation to be removed and disrnrdrd should he dampened prior to and during removal wh|^)rer possible. 3.4.2 Employees engaged in dismantling asbestos insulation shall wear atmosphere supplying respirators, \ ,tnu*rmr, 4>i .1I .1I, . 3.4.3 VScrnp insulation shall be collected and dis posed of in\*ealed bogs or other containers according to plant ond local government regulations. [ For caution labels, see 0.6. 3.5 Asbestos sprayirt^jfmplnyces engaged in spraying asbestos for insulationVo^direproofing shall wear atmos phere supplying respirntors,|see 4.1.1. 4.1.2 In lower concentration eases, and where ambient oxygen does not fall below 10 percent, a mechanical filter type respirator, Bureau of Mines Srhednle 21B, will afford adequate prolection.jThry are required when the coueestvofion caw be expected to exceed 1 to 10 times fkr TV> or cetflkf Um,t{ efjjjjJ Manufacturers recommendations for their applies* lion and maintenance must be followed. 4.2 Ench employee *h*M be inatrarteH in testing re*pirlory devices for proper fit and be required to do so prior to each use. 5. HYGIENE 3.6 Exhaust ventilation and dust collection system shall he in accordance with ANSI Z9.2, Funda mentals Governing the Design and Operation of Local Exhaust Systems. 3.6. t Caps or dampers should be provided in ' each intake hose and machine connection to maintain capacity of the system. However, care should be taken to assure that connections are open at the equipment being operated. 3.6.2 Discharge should be into bag filtera which meet the following criteria: a. Colton hag Tiller having air flow permeability not tneeeding 20 cfm/q ft h. No bypass iMvIaaa e. No leakage of unfiltered air 3.1 Brspiratora and masks must be kept clean and terilizrd prior to reissue. 5.2 Special clothing,* change room, and duplicate lockers must be provided for employee* exposed to concentrations which exceed the ceiling limit of 2.3. Dit ii \t fCA/osf faiHwimTisu of enri*vtti` ift~f C,.. -k. tkKrt. 3.3 Food, gum, tobacco, or other material placed in | the mouth should not be. kept or consumed in work areas. ' . 6. SAMPIINO 4.1 Moottaring. Sampling o4 each operation must he for at Irast IS minutes duration and taken in a frequency and pattern to accurately Ceprfelril the employee' ex posure over hi* work period. If result* Indicate % level of ashfttoe dual in exeM of the limit, the operation should be reviewed to reduce exposure, see 2.1, and resampled. The initial sampling program must determine I Portions printed la red hi til OSHA rspulatteai. Sectlaa 19I0.T3. 'I DUP 0902852 I MEASUREMENT AND CONTROL OF ASBESTOS DUST EXPOSURE S4T Page 3 the ll-linur limr wrighlrd average. Intervals between samples shall nnl excerd six (ft) months. 6.3. 3 If a sampler is affixed prrmnnrAfly in a work area, suspend (he filler ns elnxr ns possible In the person's breathing rone at the job In he mnnilnred. 6.2 Equipment. Samples may he taken with a portable 6.3,4 Remove lop section of the filter to rs|mr the hnllrry.nprrnlrd nir snnipler allachcd to an emplnyee'a bell or placed in the work arra.1 Samples may not be 7i full filter fnce. .^ /^oIlecTed hThiunrdous ' 6.3. f Ty<Ci* ^ and set at approximately l . pcj-pii ho uif. IrC<H*{h 1 ____ 6.2.1 Pump *vnm Micronnire or Model Cl 15 Flrndix Corp Srntlhfirldi Mirhiprin -mn7S ___ ------ or iaetjui >j) ' r '' it . two (2) hft/fnnte. Cheek rate periodically. When finished sampling, turn off pump and record elapsed sampling jtme. Sampling record forms, EN -- 2731. (see Figured) re available from Stationery Stores, Eng Dept, // Wilmington, Del. 6.3.6 Replace filler top after sample is rollectrd and seal with Inpe prior to shipment. Crnvimctric or Monitaire Mine Safely Appliances Co 230 N. Braddock Ave Pittsburgh, Pennsylvania 15208 6.4 Analysis. Completed snmples (exposed fillers) ore placed in a mailing lube, scaled, and sent to a qualified 1 laboratory with two copies of the sampling record. Include an unexposed filter with the sample which has been handled in the same fashion without drawing air Either unit must include battery charger and balteryi carrying case is optional. ' through it. Q*&lifi</ /siorafor'y ufotnsfxr** it uniInkle from H&ike/i Ltkerjhry. 6.4.1 All determinations shall be made by the 6.2.2 Pillar . . , membrane filter method at 400--450X {magnification) iMillippre, NpJ jM^WP-037 -AO 8hK \ (4mm objective) with phase contrast illtiminalioii. white, nongriihlcd |).lj micron pore ^ Millipnre Corporation .Bedford. Massachusetts 01730 Procedure 6.5 Record Rasping. Records of personnel and environ mental monitoring shall he maintained for three (3) years and made available upon the request of authorized representatives of OSMA and NIOSII (National Institute of Occupational Safety and Health). 6.3.1 Flow through the pump should be calibrated, with the filter in line for each pump. 6.3.2 Clip Tiller holder to lapel or shirt pocket as doss as possible to the person's: mouth, ___' This method of personnel sampling m preferred. 6.6 Warning signs conforming to Figure I shall be posted al all approaches to areas where asbestos concen trations may be above permisaible exposure limits at a sufficient distance to permit an employee to read ihe signs and take necessary precautiona before entering the area. Caution labels conforming to Figure 3 shall be used to identify containers of raw materials, map, waste, other products containing asbestos, and tamlnatsd clothing. Portions printed In rsd Mgf 05HA rsfolottons, Soctlso HtoT?3.~| rfirmfyy DUP 0902853 S4T Poor 4 MEASUREMENT AND CONTROL OF ASBESTOS DUST EXPOSURE Yollow letters on bloek background Block letters on yollow bockground T* - 2" r - i>/ 1 Letter tires ond styles to bo of loot* Avoid broothlng dust 1/ os visible os thot listed below. 1 ' Sons Serif, Gothic, or Block Wor osilgnod protective oqulpmont Sons Serif, Gothic, or Block V4" Gothic - -- Do not remoln In oroo unless your work requires It Spoclng to bo ot loost eqool to tho holfhl of tho upper of ony two linos Broothlng osbostos dust moy bo hotordous to your hoolth riGURB 1 - CAUTION SIGN - ASBESTOS OUST -b 1 CAUTION Contain* *(*' flbort AvolJ croolln, 4v*t 8rthln, *bt*i 4u*t mmr * ml*** bodily hm Lobol site ond printing to bo r*Vlty vl.lbl. n4 l,IU*. FIGURE 2 - TYPICAL CAUTIOH LABEL 1 Flftin* 1 *nl 2 mtol OSH A fqtilronionU, ScHan ItlO.U, Dup 0902854 MEASUREMENT AND CONTROL OE ASBESTOS DUST EXPOSURE . E. I. DU PONT DE NEMOURS & CO.-CONSTRUCTION DIVISION AIRBORNE DUST SAMPLE WORK SHEET 5< r Pog* ,f) S|TFWFATHFP' INSTRllMFNT NIIMRFR: SAMPLE TOTAL TIME: TFMP DATE SAMPI FD: RH WORK LOCATION: HRS. VOL. SAMPLED: 1. PUMP RATE:CC/M TIME:CHECKED BY: SPf.CiriC PRODUCT AND MATERIAL: - On: ["'T ION: VI.Ml HAVING CONTROL: DRAFTS: 2. PUMP RATE:CC/M TIME: SPECIFIC PRODUCT AND MATERIAL: OPERATION: VENTILATING CONTROL: DRAFTS: CHECKED BY: 3. PUMP RATE:CC/M TIME: SPECIFIC PRODUCT AND MATERIAL: X. OPERATION: VI MiILATING CONTROL: 0 DRAFTS: CHECKED BY: 'Va. PUMP RATE:\CC/M TIME:CHECKED BY: SI'FPir 10 PRODUCT AND MATERIAL: Vi if I'l'i pm ION: \ VI. HI HATING CONTROL: r-i DRAMS: L M 5. PUMP RATE: CC/M TIME: CHECKED BY: I & 6. PUMP RATE: ------------------- CC/M TIME: SPECIFIC PRODUCT AND MATERIAL: OPERATION: VENTILATING CONTROL: :f[ .. DRAFTS: V. SAMPLE ' BY: -- CHECKED BY: ____ ^NATURE ^ DATE: S <T> V 0 1 r 3 - TYP< . SAMPLING FtifA7 ^ DUP 0902855