Document QX80eJx1mV6nEDBxNoyv4qE25

Stale oT New York . DEPARTMENT OF STATE Plaintiffs1Exhibit LNX 5364 Plaintiffs' Exhibit ECR 5014 IT IS HEREBY CERTIFIED, that the attached is a true copy o f Industrial Code Rule No. 12 as file d with the New York State Department o f State on DOS'235 (Rev. 7/E<?j I |iK,r.\UTMK.VT I It 713 Intiustrial Fodc Rule No. 12--Removal of Dust, ^ (ia se s and Fumes Industrial Code Rule Mo. 12, os retiQorf-Mid_rodcsignated Mnv 12, 1054 and died May 13, 1954 (pimcgJSS on'd a36, tenth Rup't'lcmtmt), repealed June 21, 1958; cliecttvg_J3etob E r l , 1955; filed August 7, 1956. Statutory. authority J^JU-ar2ST267200 and 290, Labor Law. Industrial Code Rule No. 12--Control of Air Contaminants (Adopted Juno 21, 1050; effective Octuhcr 1, 1956; Tiled August 7, 1956. Statutory authority 27-a, 2S, 29, 2Dli and 299, Labor Law) 12-1. Application. This rule applies ta all processes and operations releas ing or disseminating air contaminants in any workroom or work spnre except such processes or operations as ore within the application of: Industrial Code Bale Mo. 4--Relating to Bakeries and Confec tioneries. Industrial Code Rule Mo. I I --Relating to Mining Industry and Malt House Elevators. Industrial Cnde Rule Mo. 25--Rule Relating to 'Protection nf Persons Employed in the Erec tion, Repair and Demolition of Buildings or Structures. Industrial Code Rule Mo. 27--Relating to Construction, Equip ment, Maintenance ana Opera tion of Laundries. Industrial Code Rule Mo, 28--Relating to Dry Dyeing Plants and Dry Cleaning Plants. Industrial Code Rule Mo. 32--Relating to Spray Coating of Mo. tor vehicles. Industrial Code Rule Mo. 33--Relating to Control of Silica Dust in Rock Drilling. Industrial Code Rule Mo. 34--Relating to Control of Silica Dual in Stone Crushing Operations. Industrial Code Rule Mo. 35--Relating to Control of Silica Dust in Stone Cutting and Stone F in ishing Industry. Industrial Coda Rule Mo. 33--Relating to Radiation Protection. I t applies also to all employees engaged in such processes or operations and to their employers. _ 12-2. Responsibility of employers. Every' employer shall observe and effect compliance with the provisions of this rnlc relating to prevention of air coutamination and to providing, installing, operating and maintaining control or protective' equipment, and shall instruct bis employees as to the hazards of their work, the use of such control or protective equipment and their responsibility For Complying w th this rule. 12-3. Responsibility of employees. Every employee shall use the control and protective equipment provided for his protection. 12-4, Existing equipment. Control eqnipment installed prior to October 1, 1950 in accordance^ with the provisions of the law and the industrial code than'Tn.pffect, and which is so maintained, is exempt from nil other or different provisions'of this ruin while such maintenance continues. 714 TWKLFTTl OFFICIAI. SITl'I.KMKNT 12-S. Plana and specifications. 1. Upon thu filing of plana anil specifica tions for the installation or extension of any ventilating' system pursuant to an order of the commissioner issued under section `JUS suhdivixinn fi of tin* l*nhnr Law, such plans and specifications shall be tiled in triplicate togrtlicr with such other information as the commissioner may require fur lim i-x.-imimuinn ami acceptance. 2. Any employer subject to this rule, or his authorized agent, m ar'if he so desires submit to the commissioner for bis examination and recommendations the plans and specifications uf any air contaminant control method or apparatus. I f such plans arc submitted, they shall bpquhmittcd in triplicate with three copies o f nil'specifications nccassary ro provio complete details on the location and size o f .alt hoods,-mains, branch ducts, fans, motors'and other apparatus and the kind of-work for which they, are to he used. .Upon receipt of such plans and specifications the commissioner shall examine the same end make such recommendations os may be indicated. 12.fi. Definitions. As used herein or in connection with this rilin'the fol lowing terms mean : L Abbreviations. cJ.ro.--cubic feet per minute, f-pmn.--feet per minute. . 2. Abrasive blasting operation. T he process of blasting -metal or other materials by means of abrasive fo r the purpose o f reiiioving sand, rest, scale, point or otherJsub.itnnces f or to produce certain etches or finishes; or otherwise, to 'change the phystcnl characteristics of the material.- . 3. Acceptable. In compliance with the spirit and.-intent of this rule, and after inspection by the commissioner, satisfactory to him as so complying. 4. A ir cleaning device. Any device, fo r separating'the air contami- norits from air whieb has been collected through an exhaust. . system. ' 5. .A ir contaminants. Air-borne substances such ns-dusts, fibres. fumes, gases, mists,'vapors or other impurities. 0. A ir mover. Amy device which prbducrs loreed air flow; such as a fan,, ejector, natural draft Stack and the like. 7. Approved. In respect to a dcvice or -materiil--in compliance with a subsisting resolution of. approval, adopted by the hoard. In respect to action hy the board--made the subject of a reso lution of approval. 8. Board. The Board of Standards and Appeals of the state of Xew York. - .. " 9. Branch pipe. The connection from a hood, booth:-or 'enclosure to its first junction with another pipe. ' 10. Commissioner. The industrial.commissioner of the state of New T ort 11. Confined space. Interior of tanks, hollers and other -unventilatcd spaces. 12. Control equipment. Any equipment used to prevent air contami nation o r reduce or remove pir contaminants. 13. Dangerous air contaminants. A ir contaminants in ,quantities tending to injure the health'of employees o r ereaio a substantial fire o r explosion hazard. -r ' 14. Dilution ventilation. Any 'ventilation system other than local exhaust ventilation. 15- Exhaust system. A ventilating system operating under'negative pressure fo r the control of. air contaminants. I i>i:i\\i;TMr..VT !..\i;oic 71-ri ID. Fibres. Particles produced by handling, cutting, stripping, spin ning or weaving oT cotton, wool, fur, hsbestos or other organic or inorganic inati'riul constituted of thread-like or slender ele ments. . 17. Local exhaust ccntilnlian. Any system of emulation for exhaust ing air coninininimts at the suurrn of generation. IS. Jiflin. Pipes nr ducts which extend directly from the air mover and to which branch ducts or pipes are connected. ID. Mechanical ventilation. Any system designed to- introduce air intn or remove tn'r froin any workroom or space by means or nn air mover. -0. Open surface tank operation. Any operation involving the im mersion of materials into liquids or vapors of liquids fdr the purpose of cleaning or altering the surface character, the sub sequent removal from the liquid or vapur and the draining and drying o f such materials, e:g., washing, electroplating, anodiz ing, pickling, quenching, dyeing, tanning, dressing, bleaching, degreasing, alkaline cleaning, stripping, etc. 21. Personal respiratory protective equipment, A respirator or other device worn for the purpose of preventing the wearer-from Inhaling harmful amounts of air contamiunnts. 22. Practicable. Capable of being done without disturbing cssentiul associated functions or structural elements. 23. Recirculation. The return of part or ail of the exhaust air to any spacc occupied by employees. ' 24. Shall. The word 'ushalV, 'is alwevs mandatory. 25. rumbling process. Any process In which articles, pieces or parts are placed in a rotating bnrrel, drum, mill or cage for the purpose of removal of rust, scale, debris or dust as well as for the. purpose of smoothing, polishing, burnishing or cleaning by mcens o f agitation. 12-7. Prevention. All processes and operations where practicable shall be so conducted or controlled as to prevent avoidable creation of air contami nants. 12-8. General control requirements. Dangerous air contaminants shall bo removed or millmllt'il m. pnvrrilm l in this ride nr by menus or iiii'liimlr ap proved by the board. 12-9. General control methods. One or more of the following methods shali.be used to prevent, remove, or control dangerous air contaminants: 1. Substitution of a material which docs nor produce air contaminants; - .2. Local exliauJt ventilation ot the source of generation of the air con taminant ; 3. Dilution ventilation in nny work space in which air contaminants are generated or released; 4. Application of water or other wetting agent to prevent air contami nants; 5. Other methods npprnvi't! by the board. 12-10. Specific control requirements. 12-10.1. Grinding rind polishing relicels, etc. Grinding, polishing, buffiing, scratch-brushing, operations and in abrasive cutting-off wheel and grinding nr. polishing belt trap operations generating dangerous air contaminant? shall be provided with loral exhaust ventilation and an olr-elcaning device. Exceptions: L IVet grinding, with' other than sand stone wheels and wet polishing nnd h u ttin g (ipi-rcihtiix i f crii-lofiirefi o re p ro v id e d w liirli p re v e n t sp lash II Tlli ' TWKI.l-TII "KFI< l.U. Kl IMM.KMKNT nr dispi reiun of liquitU. abrohive compounds or mirla run lbo workroom. 2. Inlrimtc ami pn*ciioh grinding discs or wheels not over one inch in diameter. 3. Grinding or polishing of articles and instruments mude of gold and platinum. 4. Intermittent tool grinding operations used for shop purposes only. 12- 10.2. Woodworking machinen. Woodworking operations generating' dangerous air contaminants shall lie provided with local exhuust cuntilatiun and an hir-clcaning device. - 12-10.3. Miscellaneous machines. The. following machines, apparatus, op erations or equipment generating dangerous sir contaminants shall bccon- trolled as provided in article 12-: .1. Cutting, sanding, dressing, polishing, buffing, snogging o r 'similar operations on plastics, leather, glass, rubber, mother-of-pearl, ivory, nuts.' and. like, material. ,, 2.. Picking or garnetting fibrous substances or shoddies. 13- 10.4. Jlielitnp apparatus.. Vessels operated.'at. or in excess of the tem perature of vollcilization* of such metals, alloys dr compounds as antimony, beryllium, cadmium, lead, selenium o.r tellurium,' together with the combus tion chamber, which generate dangerous air contaminants, shell be provided with local exhaust ventilation. Vessels', used ..for, melting,, or cleaning such metals, alloys or compounds together with the combustion chamber shqil.be provided with local exhaust ventilation when ,operated, in sch ..manner as to generate dangerous air eaatsjninaat$.''xcsption:'' 7. Portable' receptacles or apparatus which have no fixed location. 12-11. .Operation and maintenance.' " . la p 1.1. Operation. Control equipment shall- be operated in conformity with this rule. 12-112;, Repair and cleaning. Control equipment and cleaning devices shall be maintained'in good repair and clean condition, and be-'sh Jocated. as to afford ready and safe access for servicing. The maebineiy equipment, and working area shall, ba kept in a clean and orderly' cbiubtfQ vqtfi.'qjil' hiinfeaessery dust, spillage and debris removed at frequent intervals so as to 'main tain good housekeeping. 12-11.3. Grounding. Control equipment including hoods,_ducts, air mov ers. motors, and cleaning devices,-which is used.for exhausting any material which constitutes a firs.or explosion hazard.shall.bo'effectively gibmided elec trically. Resistance to ground shall not exceed. 25 obnis. 12-12. Isolation or segregation of operations,'All processes or operations relcasihg or disseminating dangerous a ir eqtamipots. shall he isolated, er- closed or otherwise segregated insofar as practicable.' r' 12-13. Separation of different processes creating, a hazard. 12-13.2. Separate exhaust system*. "W here processes generate different air contaminants which could, if intermixed,, result in a fire or explosion hamrd. atieh contaminants shall he exhausted by separate .systems so as to eliminate . such possibility. .', 12-13.2. Ignition. Processes or operations using or generating air con taminants which may constitute n firp of.explosion hazard aboil be protected from'sources of ignition. _ . ; .. 12-14, Perssnal respiratory protective equipment. 12-14JL tfse. Personal respiratory protective equipment shell not be used in lieu of other control methods, except fo f prdtcrtion of employees in emer- So in orignale Apparently should be *\otaU!xatton" .` i u : r m t m i.n ; m ' i. u m i i . gcncita nnd in tin1ri'|mir, iimiiii<<iia:u*i.. nr :uljuttliiit-itt id' i'iiuipiiii.'m >>r piucr Mil'S, or upon spei'ilii' .tpprovnl by ilu> iinnrd. 12-H.2. Jf/jirunil. I'irsomil rcspirntiiry prolrctivr equipment nhiilt lie uf a type approved by i.'ip lionril ror the |iorlirulnr class i*K substance ur substanrrs ritniititulmg tin' air cuulfliimiant. 12-14.3. , JfwViniiiii~. PcTHonal r'-spirmory protective i-quipuiunt slwll be stored in alr.-tigln'containers nr raliiliots or In un urimnluuiiii.'itei] aron. Equip ment shall be'cleoned.'M-tvicetl and I(`paired (n maintain I in effective workinp condition ..and it hall be .sterilized before use by any person other than tbe last wearer. 12-15. Goggles, masks and. shields, .-ill umpluyees exposed to air eontuuiinants tending to injure or irritate the eyes shall be provided with and shall wear either safety poppies, close-fitting cbbiuirol popples or an elfectivc fnee inask or shield. An, employee requiring pjrseriplion lensr* in the normal perform ance of his work, shall be supplied with popples designed to fit over his regular spectacles or prescription popples shall be provided in lieu of the foregoing. .12-16. Protective- clothing. All employees exposed to air contaminants 'which tend to enuse skin irritation or skiu diseases, or which can be absorbed through the skin in amounts, tending to injure tha health, shall be provided with appropriate clean, protective clothing, hucH as coveralls, coats, headgear, gloves, sleeves o r aprons as needed or where suitable, or shin-protective preparations. '12-17. SaniUry facilities. Proper facilities for flushing the skiu and body members...slmll lie provided where employees are exposed lo corrosive air contaminants. . . . . 12-18, Acquirements for exhaust systems. 12-18.1- Components and air floie, An exhaust system shall include uitber: a. .Hoods, booths iir'enclosures of ptopar design at points of genera tion or release o f .air contaminants, connected by means of pipe, duct or. other conduit to-air movers and, where necessary, air-cteoning devices; or b. Other means of proper design, for directing the flow of air contami nants from the points of ^encradon or release to air movers and..where necessary, air-cleaning devices. i. The air flow into eaehhoiid, booth or enclosure and the capacity of tha air mover shall be sufficient to maintain controlling velocities. . 12-18.2, Capacity, .The capacity of on exhaust system shall be calculated ' on tbe basis'tbat all hoods, booths and enclosures connected to the system are open except when otherwise specifically permitted by the commissioner opon bis finding .that a split system provides the required control. 12-16,3. Discharge 'from exhaust systems. Tha point o f discharge of any exhaust system shnll .be located so ns to prevent or minimize the entry or re-entry- Of coniuntinate'd air into any work place. 12-18.4. Recirculation. Discharge air which contains dangerous air con taminants shall ;hot lp recirculated. 12-lSio. Mainteniice of air floie. The required air velocity and rate of air flow through, a hood, booth, enclosure or other poiut of ventilation shall be. maintained at. all times when tbe machine or process to which ventilation is applied;is in' operation.'r use. 12-1S;6., Make-up air. A ir inlets- or air supply systems shall be provided for the !admission of pinko-up nir-to replace that removed by an exhaust systqtu, as..fpllws:;> The air supply shall enter the workroom In such manner thnt no employee in a normal working position is subject to a draft of air having a temperaturn o f more than 10F below' the general temperature of the room or a greater velocity, than 200..feet per minute. ' .Subject to this requirement, windows, duors and other building openings 718 TWELFTH U K F lriA I. S r i 'I'LlSMKXT may be used in place of_ special air inlets. Make-up air sliail not be taken from any location where it is contaminated by discharge Crum exhaust duels, stacks or other plant effluents. 12-18.7. Design o f hoods, booths pr' enclosures. Every bood, booth or en closure shall be designed, constructed and located, where practicable, so that the air contaminants will fall, be projected or drawn in tbo direction of air flow. 12-18.8. Construction o f hoods, booths or enclosures, a. Heavy abrasive cocentra(tons. Hoods, booths or enclosures made of metal shall be at least two gauges beavipr than the gauge required'for piping connected thereto. If mode of other materials, they shall be o f equivalent strength and rigidity. b. .Gases, fumes, vapors and light dusts. Hoods, booths or enclosures shall ha at le ast the ana gauge os the piping connected thereto. 12-18.9. Piping-design o f systems handling dust. 12-18.9.1. Pipe joints. L All joints'and seams shall be soldered, welded or otherwise sealed to make them! tight. Exception: Pipes on exterior of buildings' on discharge side of a ir movers. .. 2.. Longitudinal lap joints or seajns in metal pipe, except When- of welded construction, shall be douhle locked .or lapped one-inch and `riveted with rivet centers of not more than th rei idehes. Sheet metal screws may be used when nonfihrous material is bandied. . 3. Lap joints shall be made so .th at the outlet and of one length fits into the inlet end of the next Iongth in the direction' of air flow. The mini mum length o f lap shall be 1% inches and jivtrts shall be `provided at not more than. 4y-inen centers. There shall be not less than four rivets in any such lap joint. Sheet metal, screws may be used when, nonfibrous materiel is'handled. 4. S pot welds may be used in placo .of rivets in equal numbers. 6. Jo ists of material other th an , metal shall he of equivalent strength and rigidity. 12-18.9.2 Telescopic joints. Telescopic joints, shall be constructed so that the pipe connected to the hoed extends into, the. outer pipe a t least one pipe diameter, b u t not less than six inches, when .fully tended. The end o f the outer pipe shell have' reinforcing band or bead. The] fixed member shall he firmly supported.- . . 12-18.9.3 Branch pipe junctions to mains. L Every branch pipe shall he connected to the main' pipe at the side .or-top end at an.angle' not ex ceeding 45 degrees and shall incline in the direction of, air fiovi'.qt junction to the main. Branch pipes shall not .'project into, .thb main; and 6hal! junction with the main in the tapered ..section as close-as practicable to the larger end of the Beotion. "Show' or special fittings are acceptable where space limitations prevent compliance with the above. . . 2. Hot more than one branch pip shall enter the main a t the some plane of intersection, except at the terminal,' or where .the branch pipes enter at an angle of 30 degrees or less. 12-18.9.4. Transformation pieces. Transformation pieees. shall be tapered so that the length o f the taper shall.he not .less than five times .the differ ence between the diameters of the smaller and the larger pipis.? Transfor mation pieces shall increase in area'b y the.'amount necessary to maintain the required air velocity, and shall he d the same gnuge o f metal as the larger size of pipe. 12-18.9.5. E lio u s and bends. 1. Round elbows shall have a center line radius equal to tw o times the pipe diameter wherever .available ' space permits.. ' / , ,yi 2. In ' plaeo of the above, rectangular elbows', venturi-shaped elbows or other bend? of equivalent law-resistance design'may be used. I DEPARTMENT OF LAli UK 710 3. All 90-ricgree bends ur elbows lx inches or less in diameter shall be made of not less (ban live pieces nr ei|uivali-nt prefabricated construction. All OO-dcgrre bends nr elItows more thug six inches in. diameter shall he made o f' not less than sevrn-piece construction. Obtuse angles, bends or elbows shall he pieerd proportionately. 4. Elbows and bends shall be of metal nut less than two gauges heavier than the piping.connected thereto. 12.-13.9.6. Cleanout openings. 1. Cleanout openings, spaced not more than" 20 feet- apart on pipes which are larger than 12 inches in diameter or 12 feet apart, on smaller diameter pipes, shall be provided in all horizontal runs and shall aways be provided'at bends and piph junctions. 2. Cleanotat openings.shall be of a size'that will permit ready access to the interior of the pipe and shall offer no obstruction t o a i r flow. Remov able eaps shall be installed'at all terminal, ends. W henpipiug is constructed with flanged- joists for purposes of cleaning, inspection openings shall be provided in such piping in .place of regular cleahoals. 3 . - Pipe reinforcing shell be done on tbo outside of (be pipo. 12-18.9.7. Dampen aml galea. The use o dampers, gates, or orilleos is prohibited in an cxnaust system except for the purpose of balancing the air flow in the system. If so used, they shall bo riveted or permanently fastened to prevent any further manipulation. ' 12-18.9.8. ' Pipe supports. 1. Horizontal runs of pipe, including branch pipes, extending' inoro than Ibree feet shall be-securely supported and fastened to' some substantial portion nf the building structure or to per manent, supports.- Such supports shall not bo over 12 feet on centers^ for 8-inch or smaller pipes ana 20 feet on centers for pipes larger than B-ineb diameter a n d in a n y ease shall be sufficient to cany the -weight of the sys tem if .plugged with material. Exception: Tbielc-wall welded pipe may be spaced on such centers os will be structurally safe. 2. Vertical runs of branch pipes shall be supported securely. ' jt-13.9.9'. Pipe location. Piping shall be located so- ns not to cause a Are hazard, shall be accessible for inspection and maintenance and shall bn protected against external damage. 12-1S.9.10. Ifntcrinls o f construction. 1. Pipes or d a rts shall be con structed of not'lcs5 than the following gauges of steel o r iron, plnin hot rolled o r galvanized: Pipe Diameter U. $. Standard Gauge o f Sletal Highly abra sive m atter an d long hour usage (over 20% use factor). Highly abra sive m atter and short hour usage (u n d er 30% use factor). Mild abrasive m atter and long hour usage. Mild abrasive m atter and short hour nsage. Up to. 4" Over 4 " to 8" inch Over 8" to 18* inri. Over 18" to 30" inch Over 30" 22 20 ]3 16 14 24 22 20 IS 16 24 24 22 20 13 i 730 TW K U 'TU O IT IC U I, SHM'LKMENT * *" 'i i -- -- 2. Where u flexible scetionof piping is necessary, flexible noneollapsible piping shall be used and Us length shall bp kepi lu a minimum. 3. Ollier malrrials used fur Ihu construction n[ piping, duels, liuuds, hnulliK and rndnsun'H sludl he uf a type nppruvrd by llm Ijnurd. 12-1Si!.11. .lir fluni requirements. J. 'i'im aysluni shall he so doigin-d ru (u ppividu the reijuircd air flow iu yvery brenrh pipe. dlonm, shall be designed lu provide a substunt hilly unil'uriii air vebwily thruugh each It mneli. . 2. The brunch and mniii pipe size shall he based oil an air velocity suffi cient to Irunsport the substances collected, by the bomb--, buulliH orenclosures, except where an oversize main or plenum system used with accept able .means of refuse'removal therefrom. 3,, Drnnuh pipe connections to kouiis, booths and enclosures shall be shaped tn minimize the orifice and rcslsluncc losses due to the flow* of uir into'the system. 12-18.10. / 'ipmp-desipu o f systems handling fumes, gases and vapors. 12-18J 0.1. Design and operation. Ttm piping system shall be designed, constructed, maintained and operated to insure the flow of the'volume of exhaust air required to protect employees from exposure to dangerous uir contaminants. 12-18.102. Materials o f construction. 1. Pipes or duets shall be ennstrueted of not less than the following U. S. Standard gauges of strcl or iron, plain hot rolled or galvanized: Duet Diamtter Gauge Up to 5" . . . ____ Over 6" to 29" . . . . ........24. over 29" to 39" . . . . over 39" to 49" . . . , over 49" ............... Rectangular Duct Gauge Maximum Dimension 4" lo 30" .............. . . . 2-i over 30" to 6 tl" ........ over 60" to 9 0 " ........ . . . 2 0 over 9 0 " .................. 2. .Pipes fo r corrosive funicsj gases o r vapors shall ba constructed of, or coated with, materials of corrosion resisting properties, 8. Other materials used for the construction or piping, ducts, Imods, booths and enclosures shall be .of equivalent strength and rigidity. 12-19. A ir movers. 12-19JL General. Every exhaust system sludl he connected to an air mover wliich shall maintain the required rate of air flow in all purls of the exhaust system. Burh air mover shall he of a type and _dzo suitable for lumdling the air contaminant to ba exhausted. Where prartirahln, tin* nir mover shall he located beyond the air-cleaning equipment so as to bnnillc clran nir. The commissioner may require the submission to him of the manufacturer's, per formance data for the air movrr. 12-102. 'Capacity. The operating characteristics of the nir mover clinll bo such as to create the required rate of air flow when operating against the total resistance pressure of the exhaust system. When requested by the com missioner, the clcsign calculation of tho exhaust system Hindi ho submitted ti* him. 12-102. Connection to system. In all exhaust systems, exropl when Iho air nmvor draws from a plenum chamber, such air umvor shall he i-miuci'li'il In tho Inlet pipe hv a split sleeve or d-aw hand not lnw Ihnn IS inrhp* long seoorely fitted to "prevent sir leakage. This' provision, however, does not ap p ly when tho air mover has an inspection door o r wlmii the nir mover is located nt tho end of the system o r otherwise may be readily iluwmineefed from the system fo r inspection. .. 12-19.4. -Fire and explosion. A ir movers' handling nir cnnluiiunc flnni- mable or explosive dusts, gases, or vapors shall have nonferrons moving purl-*; ItKl'AKTMK.VT OK LABOR 72] 12-20. Air cleaning devices. 12-20.1. UnjuirnurnUi. Every exhaust system handling dust or fibres shn.ll lie iirni:id>il with an nir-rlcaiiing device to' remove air contaminants hefnre dis.-linrgp In mner air. Kxhaust systems handling fumes, gases, mists nr v|mr.< .'null Iif .in arranged llial discharged air contaminants will not tv-riilvr tIn* wnrlcnmm. 12.2>i.2. /.in.inti of drhrir. Coih-cied materials shall he removed and disposed of at such intervals as may lie necessary to maintain the equipment ui the rtquiri'd operating efficiency. Safe and rendy means shall be provided for vurli removal and disposal. V 12-21. A ir flow and broach pipe requirements. 12-21.1. '(atimtarir grinding, polishing, etc. Stationary grinding, polish ing. huffing n n d scnuch-hrushing operations subject to article 12-10. shall be provided with local exhaust'ventilation operating at not less than the rates S p ecified in the following table: Jiinim um rate of S'ZEOF IVllF-W. ORlilSC airflotothrough. i D u im cter in inches W idth, inches hoodine.f.m . 1. OUIXWNG AND AURASiVE CUTTi-VO-OFF WHEELS Up to 9 ........................ notover l 1/ 220 Over D to 16.................not over2 30i) ' Over 10 to 19............ not over 3 500 Oven IP to 24............ not over 4 010 Over 24 to. 3 0 .. .. .. .not over 5 SSU Over 30 to 36............not over 6 1200 2. BUTTING, POLISHING, AND SCRATOH BRUSHING WHEELS (NOTE 1 ) Up t o 19 ........................not over2 3UU Over B to 16............. not over 3 500 Over 16 to 19............ not over 4 610 Over 19 to 24............ not over 5 740 Over 24 to 30............ not over 6 1040 3. HORIZONTAL SINGLE SPINDLE DISC GRINDERS Up to 12....................... - 220 Over 12 to 19............... -- 390 Over 19 to 30............... -- 610 Over 30 in 36............... -- 3S0 4. HORIZONTAL DOUBLE SPINDLE DISC GRINDERS Up to 19 inc.............. -- 1 pipe 610 Over 19 In 25 inn.,... -- 1 pipe 8S0 Over 23 lo 30 i n r .\ .. -- 1 pipe 1200 Over 30 to 53 in c .... -- 2 pipes , 1770 (Nolo 2) Over 53 in 72 i n r .. .. -- 4 pipes C2S(J 5. VERTICAL SINGLE SPINDLE DISC GRINDERS ( N o t c o v e r e d ) Up tn 20 inc...........'. 2 pipes . 010 ISure 2) Over 20 to 30 inc.. . . 2pipe 1490 Over 30 lo 53 in c .... 4pipes 3530 liver 53 in 72 inc___ 5 pip 6010 .Voir/ u/>)iltting to the ntn rr la bitt; -Vote J. " / `i/.'a/iiiiti inJwvJ.v" mcnii> "mmir-up" hard wheel I'tired with abrasive. .Vo/v 2. One brniirh pipe may bo u*rd wherever twn nr innre branch pipes ore required provided the crnss-SPCtinnnl area of the single branrli pipe is rqunl in the mmliiiicd i-rnsF-sei-timinl a m of the required iiuiiiIilt of hra/irh , pipe* and tlie air flow inru the enrirrling hood is sabslnntially uniform at all pnints. (; r I 722 TWELFTH O FFIC IA L SUPPLEMENT Size op W heel ok Hisu Diameter in inches (Contd.) Width, inches (Contd.) Minimum rate of air flout through hood in c.f.m. ( Contd.) 6. VERTICAL SINGLE SPINDLE disc GRINDERS {More than half covered) 'U p to -20' in e .. 1 pipe 500 (NoteS) Over 20 to 30 ine.. 2 pipes (Note 2) 760 Over 30 to S3 ine. 1 2 pipes (Note 2) 1770 2 pipes (Note 2) ^ -3140 7. i belts and Straps* Up to 3 220 3 to 5 300 6 to T 390 7 -to 9 60 0 to 11 610 11 to 13 740 Notes applying to the above tables: Note 2. One branch pipe racy bo used wlrever two or moro branch pipes are required provided ' the cross-sectional ormi of. the -ansie branch, pipe is equal to the combinrd cross-sectimial area of the required nnriibcr-of branch . pipes and the air flow into the encircling hood is substantially uniform at all points. - Note 3. "E a lf coverei" means a minimum covering o f not less than 60 percent of the open area over the top .of the grinding. wheeL ` .Vote 4. Lurnl cxlrauxt ventilation of high speed machinery shell provide1 such higher rates of air flow as may be necessary to! ebntrol the. contaminants.' The Commissioner shall advise on the mininmin rates of air' flow' reqtiired in such cose, * 12-21.2. Other stationary grinding^ polishing, buffing and scratch-brush ing operations. 1. F or wheels of greater width than given' i n `the above tables the minimum rate of ventilation shajl.be not'less than, that'specified fo r wheels of equal grinding surface area. 2. F or wheels of greater surface area; thap' tbat given'in the oh.bve tables, the minimum air volume shall he increased- a t the rate of 30 ?efm to eSch 20 square indies of wheel surface area. ' .. . i-; . . 3. Grinding or polishing belts end strap s wider than ,-.13. inches shall be ventilated at a rate of not less than 60 efm per in$k.jpf width. .. 4. F o r any whed or belt strap not specifically listed, the rate of ventilalion shall be in proportion to the above'feq'nirements.-.- . 5. An air volume o f -200 cfm m ay'be iieed forjw elry or dental buffing where wheels sbe inches or leas in ditmetr ers tised. arid for surface grind-. era, entter grinders, and similar tool room machines. " -, - 'rt> - 6. Swing frame grinders shall be provided where practicable with a booth which'shall be ventilated at a rate of not less than ISO efm per square foot of open area. 12-21.3.. Bead and enclosure design. 1. Local exhaust hoods which, are used as protection hoods in grinding operations, shall be .constructed in ac cordance with artide 10-22 of Indnsfrial.Cjpde. RuleJT.lO.' ]'?:. .-'-/V. ' 2. Portable or flexible shaft tools used' .for grinding. .huffiig,-' polishing and sanding operations, where subject to 'article 13-10 .s h all he'conducted with hoods of .one o f the following types where.1practicable: 1. A downdraft grille.of adeqnate size with respect to the work proc essed with exhaust ventilation of not lam. than 160 fefnt of gross open area. * Kaie 4 does nnc ipcctfiealty Apply io ay of the requirem ent of the table at>peHnB on Vite 721 and 722 but Apparently ' has hrrn Included for scncral ihfnnnatian. I l)KIJ.\UTMKNT UK I,.\l:ul< 2. " A bontb or enclosure ventilated at a rate not less lUuu 1U0 cfm per square fuel of gross open area. 3. A suction hood of sufficient site and capacity to maintain a velocity in the direction of the hood of not less than 100 fpm at the point of oper ation when it is most remote from the hood. Wherever practicable, the hood shall be located in the direction of dust throw. Exception.' Occasional portable and flexible shaft grinding, polisliing, buf fing and sanding operation? which are not.regular shop production operations. 12-21.4; Woodworking and miscellaneous. 1. Woodworking and miscel laneous operations creating dangerous uir contaminants shall be provided with local .exhaust ventilation at rates not less than hcroafter specified. 2. The air volumes and number of branches required for woodworking and miscellaneous machinery subject to this rule shall be not lore than those shown hereafter. Branch Air vnlumt* . cfm pipe diameter inrhes 200 . 350 3 4 440 4V, 550 5 600 SVs BOO 0 1100 1400 . . 1800 2200 7 s 9 10 3100. 11 A- Self-feed table rip saws: 350 cfm for bottom hood and 350 cfm for saw hood. A'ote: For dosed chain saw use 550 cfm for saw hood. B. All other rip, table, mitre, swing and variety sates. Up to 12-inch diameter: 350 cfm Over 12-inch to 16-inch diameter: 440 cfm Over 15-inch diameter: 550 rfm Dado heads:--any diameter: 550 cfm C. - Gang circular sates. Ventilation rate shall be such as to provide the required tuntrol, D. Sand'satus and resales. r p .to 2-inch blade: 350 cfm each fp- rutting hood end lower wheel enclosure. Where wheel diameter is lu inches or less--350 cfm in singla hood. Over 2-inch to 3-inch-wide blade: 550 .rfm for cutting hood and 350*cfm foT lower wheel, enclosure. Over 3-inch to'4-inch-wide blade: S00 cfm for cutting hood and 550 cfm for lower wheel enclosure. Over -i-iuch tn o-ineii-widr blade; 1100 cfm for cutting hood and 550 cfm for lower wheel enclosure. Over 5-inrb-wjdo blade: 1400 rfm for cutting hond and 550 cfm for lower wheel enclosure. Disc sanders. Up to 12-incb-.dinp>etcr disc: one branch with 350 cfm. Over 12-inch to lB-inrh-diometcr-disc: one branch with 440 cfm. fiver 13-inrh tn 2(i-meh-dinmcter disc: one hronch with 550 cfm. 724 TWKLFTU OFFICIAI. SITH.BMEKT Over 25-incb to 32-inch-diaraeter dise: two branches each with 350 cfm. Over 32'inch to 3S-inch-diaincter disc: one branch with 350 cfm and one branch with 550 cfm. Over SB-inch-diamcIcr disc: one branch with 650 cfm and two branches with 350 efm each. F. Multiple drum sanden (Drums over the table). Up to 31-inch-wide drum: one branch per drum with 550.cfm. Over 31-inch to 49-inch-wide drum.: one branch per drum with 800 efm. Over 49-inch to 67-mch-wide (Jrfim: ope branch per drum with 1100 cfm. ,, Over 67-inch-wide drum: ooe-brailch per drum with 1400 cfm. Use 350 efm for brush. Fewer branchs may be used as long as total branch pipe nir volume is not reduced. ' 0. Multiple drum sanderi (Drums under the table). Up to Sl-tneh-wide drum': one branch per drum with 350 cfm. Over Sl-inch to 49-ineh-wide drum : one branch per drum with 550 efm. .. Over 49-inch to 67-inch-wide drum: one branch per'drum with 800 cfm. Over 67-ihcb.widc drum: one branch per drum with 1100 efm. Use 350 efm on brush.' FeweF'branches may' be'used as long as total branch pipe air volume is not reduced. H. Single drum and spindle sandsrs. Up to 50 6qnare inches, of .sanding surface: 200 cfm. ' Over 60 to 200 square inches of sanding surface: 350 cfm. Over 200 to 400 square inches o f sanding surface : 440 cfm. Over 400 to 700 square in ch .o f sanding surface: 650 efm. Over 700 to 1400 square Inches o f sanding surface: 800 cfm. . Over 1400 to 2400 square inches of sanding surface : 1100 cfml ' On'drums of more Uian 2400 square inches of sanding surface a branch of a sire determined as. follows: d = 0.133 y5k .Where d=> branch diameter in nearest standard size and i s equate .inches of sanding surface. .. On long .drums o f small diameter, air volumes mentioned above should be divided into two ar-.knore branches at least equalling' in volume th at of the single volume specified. 1. Horizontal belt or edge lau deri.' Up to 6-inch-wiae belt: 440 cfm for drive pulley and 350. cfm for Idler pulley. Ovev 6-inch to 9-inch-wide belt : 550 cfm for drive pulley and 350 efm for idler pulley. Over 9-inch to 14-incb-wie belt:' BOO. efm for drive pulley and 440 efm fo r idler pulley. Over 14-incb-wide belt : 1100 cfm' for drive pulley and 650 cfm for idler pulley. .. !r. ... Where more than one belt Is used, the.air volumes speclSed shall he required f o r each belt. Where a common hoodis used for more than one belt, a volume of., ript Iras' tbjin the aum of the volumes specified shall be used. . Where the belt direction Is reversi)>ie, thc vbiifme for tbe"ldlcT pulley Bhall be the same as'.specifid.fdr th .drive pulley. J. Vertical belt sonder (rear belt, and both pulleys ebclod). Up to 6-ipch-wide belt : 560 efm. Over 6-ineb to 10-inch-wid belt : SQO.cfm; Over 10-inch to 15-inch-wi.de b d ttilO O cfm. Over 15-inch-wide belt : 1400 efm. ( UEl'AKTMEXT OK LAUGH 725 K . Jointers. Up to. 6-iwh-wido knives: 350 cTm. Over 6-inch to 12-inch-wido knives: 5511 eftu. Over 12-inch to 20-incb-wide knives: 800 dm. Over 20-inch-wide knives: 1100 cim. L. Single planers. Up to 20-inch maximum working width; 600 cfm. Over 20-inch to 26-iucb maximum working width: 1100 cfm. Over 26-lach to 32-ihch maximum working width: 1400 cfm. Over 32-lnch to 3S-inoh maxiatun working width: 1800 cfm. Oyer 3S-inch maximum working, width: 2200 efm. M. Double planers. Up to 20-i'neh maximum working width: 600 dm ' fo r upper bead and 550 efm for lovrer head. . Over 20-iueh to' 26-inch maximum working width: 1100 cfm far upper head'and 600 efm for lower hend. Over 26-inch to 32-ihdt maximum working w i d t h 1400 cfm for each head;'.' ' Over 32-inch to 38-inch maximum working width: 1300 cfm for upper head and 14p.0 cfm for lower head. Over 36-inch'maximum working width: 2200.cfm fo r upper head and .1400,cfm for lower head. N . , ilouldcrs, matchers and sisers. " .Up to 4-inch maximum size: 350 d m for each side bead, 550 cfm for each side bead, 550 cfm for top head and SQO cftn for bottom head. . Over 4-inch to 6-ineli maximum size: 660 cfm for each side head, 800 cfm for top head and bottom head each. Over 6-inchto 8-isch maximum size: BOO cfm for each side head, 1100 efm .fop top head, 800 cfm for bottom head. '.Over 6-inch maximum size: 800 cfm for each side head, 1400 cfm for top head; and bottom head ench. Where profiler is used, provide additional volume not less than that specified for top head. O. Sash stickers. One 4-inch branch nit each head. P. i f ood shaperf. Up to 1 horsepower per spindle: 350 cfm per spindle. Over 1 to 8 horsepower per spindle: 650 cfm per spindle. Over'3 to 5 horsepower per spindle: 800 efm per spindle. O ver'6 to 7% horsepower per spindle:-1100 cfm per'spindle. Over.7Vi horiepfiwer per spindle: 1400 per spindle. Where one continuous hood includes two or more spindles, the air volume required for the hood may he based On a volume per spindle of 250. 'cfm less than specified above, hut in no esse less than 350 cfm pef spipdle, Q. Tenoners.Top'and: bottom tenon heads: 550 cfm for each head. Cqpe. mad dido heads: 550 cfm for each head. Ciit-.ojf airs up to l2-inch--diameter saw: 350 cfm. Over 12-incb-diameter saw:'550 efm. R. ' .utomatic lathes.' ' 350 "cfm per foot , of cutting length where hood is stationary. Branch .pipes shall be located to provide effective air removal aver full face of haiod. S. Pulley pockets: 550 cfm. f t: f}'  726 TW ELFTH OFFICIAL SUPPLEMENT T. Pulley atiles: 650 cfm. ' U. Bogs. Up to 1 ton of refuse per hour: 1600 cfm. Over 1 ton of Tefuse per hour: oir volume to be based on 50 cfm per pound of refuse ronvoyed. Note I : Use branch and main velocity of not less than 4500 fpm. Note 2: A separate exhaust, system should be. provided but addi tional separator is not requited if separator used for other wood? working equipment is adequate. .. V. Floor rtreeps. The area of brenebes te floor sweeps with covers which ore kept closed when' not in use need not be included in computing total air volume. , j;vV . W. The. air volume exhausted for any machine not Specifically listed la this rale shall he not less than 350 cfm and the hood shall'be so arranged that an ipvrard flaw o f s ir into the ventilating sistem is'maintained daring " the operation of the machine at not less than 4500 fpm. X. Portable- senders shall conform to 'th e requirements for portable grinders (section 12^1.3, paragraph.2). 12-22, Open surface tank operations. 12-22.1. Open surface tank o p e r a tio n s Open'.surface tank operations creating dangerous air contaminants'shall be provided' with .ventilation to remove Snch contaminants. ' `` 12-22.2. Classes o f operations. F or the, purpose `o f this rule open surface tank operations'are classified into 10 classes as follows: Class I. Electroplating and anodizing .operations involving: Chromium, arsenic, tin from alkaline baths, depleting; cyanide solutions of'copper, bress, bronze, zinc, cadmium.' j. Class II. Electroplating operations- involvjag: Cyanide solutions of silver, gold; acid or neutral Eolations of copper, zinc, nickel, lead. . - Class I I I . Metal pickling or stripping operations' using sulphuric or hydoehloru acid. Class I F . Metal pickling operations using .nitric or hydrofluoric add.. Class V. Alkalina cleaning and other w ater solutions and water oper- ated at a temperature o f over 180 F . i' j, "- . Class 77. Alkali cleaning sblutioni'operated at a temperature o f ISOF. and under. Class' F JJ. Solvent cleaning processes using flammable solvents haying _u open cup flash point above 100":F. '' . Class 7711. Solvent cleaning processes using flammable solvents,'having an open iu p flash point of 100 F aiid u n d e r . ` ' i,-' Class I X . Solvent cleaning processes, using 'nonflammable solvents' except when used only occasionally and kdpt-covered'when hot in use.' ' Class X Solvent cleaning processes using mixture of flammable-and nonflammable solvents. 12-22.3. A ir flow requirements. 1. Dilution ventilation shall be provided at the following rates! fJo r (he class operation involved: 3,..Either mechaniecial or natural ventilation am o u n tin g 'to >10 cfm per square foot of open tank surface rea, in all rooms in wwhhiicch class 11; V or "VII operations are conducted. - ' 2. .Either mechanical or natural' ventilation .m ounting'to 50 efm"per square foot of open tank surfaee area in all roqnis where class H I opera tions are.conducted. . 2. Local exhaust ventilation shall be provided fo r class .I , IV , T , V ili, IX and X operations and may be used in lieu of dilution ventilation for all other classes o f operations. r.V.-.ite -T UKl'AHTlIliXT n l' I.AWll! J;M22.1 I. <xhuii.il rrnfifitttiiri. Lnca.1 cxhflust ventilation shall be by neons .......... : the fnllnwing: 1. Enclosing liuuil; 2. (Overhead canopy; !. Lateral JlMLI.ii p haoil exhaust. An enclosing hood shall project over lie enure u>:k :ni.I be Used in pnsilimi in such lorntiun tlinl the head of the mpU'.vi'f in ull hip normal, working positions is in front of the hood opening, th hood shall ) .rigidly constructed and provided with exhaust ventilation capable nl' rrentinp an air velocity of not less than 100 fpm through the anod opc iiiiiL'. . 12-22.6. firrrh, ad canopy ixhaiut. An overhead hood shall project over the eni'in* tank, shall be located as close to the tank' as possible consistent with the iiprrntinn performed and may be open on Ihrre or more' sides. The hood shall .In' .'provided irit.exhaust ventilation capable of creating an air vlneity. of not., less than 100 fpm through all openings between the bottom edges of the hood and the tap edges of the tank nearest thereto. 1&22.7. Lateral--eihaitst. I . A lateral exhaust hood shall cause essen tially .horizontal air movement over the tank townrdstbe hood, shall project over the tank s i fa r as practicable and shall be provided with an air flow not less* than that specified in the following table : c r u sv. ft. o r t a s k mmiface area for task v i m one loss stntl aitaimSt \v .iu . oh ' pA irrm nr on with eqviv.auf.xt nAFri.r.1 Tank width in feel iffluo; - ........... Tank length tn. feel Class 0 -- 0.24 0.25 -- 0.49 0.50-- 1.0 ........ 100 n ............. 50 n i . . . . . . 75 IV . . . . . . 75 v . .......... 5 VI .......... 75 ,v n 50 v i n ' 75 125 150 60 75 95 110 95 110 60 75 95 110 60 75 95 110 For' free-standing tanks, i.e. without baffle, increase the rate "25' percent except for class VII, V III, IX or X tanks equipped vyith effective condenser. 2. ;Exhaust slpts/tWhere exhaust manifolds with slots flush with the inside of'the tank-lining and extending.'.the foil length of the tank side are used: .1 . Every tan k 24 ibches .of less in width shall be provided with au vexhaust slot at; least one'inch, and not more than three inches in width on at least'one of. the longer sides. 2. .'Every tank. Over 24 inches in width, shall be provided with at least two such slots, one slorigeachof the two longer sides. 3. The manifold shall be'so constructed or baffled os to provide an .average distribution of.air flow. ~12-22.fi. jr rfcioard..',The level of the vapors in any class IX tank shall be kept below, the top, id^a of the tank hv a ilist.mre equal to nt least onenaif tbe tan k wbjth or30 inches, Avhichevcr Is less. 12-22.9. Heating." 1: External healing tourer, Xo external source of heating shall lip' used, for c.lnss y i l , V U I or X operations. 2. <?&'Vr*lipro -ftis' ib 'uy*d as fuel for healing i-lnrs IX tanks, the com bustion'.chamber shiiil bt' tjslit- construction, except for nccessnry combustion and fldg;-pl>cjiinps. Mn-lmmcaily vcntilnted flues shall ba independent of the ') TWELFTH OFFJClXL SUPPLEMENT exhaust duet. Natural droit flues shell be. provided with d raft diverten. All flues shall be constructed of corrosion-resistant materiaL t 3. Electric, Electric heatingunits fo r tanks of .class I S operations shall be constructed o f materials resistant to the tank contents ana shall be eon* straeted and installed ao aa to prevent hot pota. 4. Them osttflis control. Every tank of a class IX operation containing a heated liquid shall be provided with two thermostats, one of which shall be connected to control o r shut off the source' of heat when the contents reach, a temperature not higher than 2QF in excess of tbie boiling point of the solvent - in its oncontaminated, state and the ojher of which shall be located above the vapor zone and be adjusted to shut off tbe sdureef heat when the tempera ture in the zone of the thermostat is 125"F 'or above.- ' 12-22X0. Control means other than ventilation. I . I f tank covers or sur face depressive agents ore used es thp control method, they shall be so used os to give effective control throughout .the entire' operating cycle of the tank. 2. When beat is added to the wotihoom to pfeveht th condensation 'of water vapor evaporated from open '.tanks into mist, suet* additional J^eot shall be so contra11ed th at it does not raise'the wet-bnlb .temperature ib.the lower six feet of the workroom above 80*E.,-:-, . 12-22.TT. Drying and draining. 2.' Booths Slid tunnels in Which products removed from dsns V II or V ili tankm an' dried, shall b.-eqnstiuctod of .in. combustible material and provided with exhaust ventilation ' capable of pro- dneing an .air flow of not less than 100 f.prn. into.oil opahings. The rate .of ventilation shall be such as to maintain' the' solvent concentration below 25 percent of the lower explosive limit. '. 2. A ll products after immersion in either doss I X o r X solvents [shill be held in.the vapor zone o f tbe tank and shall, not be withdrawn from th tank until the product reaches the vapor temperattoc' as. evidenced by the stopping of vapor condensation on the product. ' " " /!. 3. When excess solvent' on products removed ,,from class VU, V IH , IX and uct shall be provided with a ventilating hood, booth oir enclosure,, ' '..Ji, 'd?-. 12-22X2. ,Condensers.' Class IX atanks-shail. be equipped with condensing or cooling surfaces consisting of pipes, coils,iw.ater`jackets or any. combina tion thereof- located on at least two 'sides in the Upper portion'df the tank above the solvent liquid level. W ater,'refrigerant or other cooling media-sball be circulated through the condenser wbefikver th'o tank is in operation.1 ' 12-22X3- Cleanoyt doors. Tanks or machines used f a r solvent cleaning and having .a surface-vapor area of-mote -than two square feet, shall be equipped with suitable cleanout or sludge doors- located hear the bottom' of each tank or still. Sueb doors shall be so designed hrid gasketed that there is no leakage of solvent when dosed. - ' .. . - . 12-22X4. Solvent transfer. 1. Transfer of class. V III solvents from drums to tanks shall be by means of a'hosa or pipe leading.to the bottom..of the tank being filled. Such drums and tanks sball be effectively grounded electrically. .. 2. Class VIJLI, IX or X solvents sball not be stored o r transferred, in uncovered vessels. 12-22X6. Inspection- and maintenance. ' I . Before aleaning -tbe interior of any tank, the contents shall be drained off. and the cleahaut'doora, if any, Ehall be opened. All pockets in tnuks or pits where 'vapors may collect shall be ventilated and cleared. DK.rAltTMKNT OF LABOR 729 2. Floors ami platform: around tank; ahsli be maintained in aceordanre with Industrial Code Rule J5o. 15. 12-22.16. U'eldiny. N'u work requiring welding'or open flame shall be done near any solvent cleaning equipment unless such equipment bn: first been thoroughly cleared of solvents and their vapors. 12-22.17. Personal protection. All employees working in and around open surface' tunk operations shall be instructed as to the hazards of the work and the precautions to be taken. 12-22.1:-. .'t/wrtul irrcuit[Imi* fur cyanide. 1. When rinse arid nnd cya nide tanks are so installed and used that any of them may be contaminated with cyanide or acid, such tanks shall be provided with local exhaust vent!-' lation. 2. Cyanide tanks shall not' be provided with drains or overflows which will allow the tank contents to mix with liquid drained from other tanks either on the floor or in floor drains. 3. Cyanide* salts shall be stored in closed containers in a lacked endosnre and the floor of the endosnre shall be raised above any floor on which acid 'carboys are stored., 1 2 -2 3 . Tumbling processes. 12-23.L General provisions. Tumbling processes creating dangerous air contaminants shall be provided with means to remove pr control such con taminants at the point of generation. 12-23.2, A ir flow requirements. Tumbling mills, drams, cages or h an d s not within the above exception shall be placed in an endosnre which shall be ventilated.at a rate of not less than 76 eJ.ta. per square-foot of horizontal ares of the enclosure. Air velocity through openings into the enclosure shall he not less than 400 f.p.m. Exception: The above does so t apply to stills, drums, cages or barrels which are completely* enclosed during rotation and disseminate air contuminants . only when being charged or discharged. Means shall he provided to control such contaminants. 12-24. 'Abrasive blasting operations. 12-24.1. General provisions. Abrasive blasting operations creating dan gerous air contaminants shall be enclosed as completely as practicable and shall he provided with a local exhaust system to remove the air contaminants. Exception: Outdoor abrasive denning operations where the operator is fur nished with and wears an approved air-line respirator. 12-242. Classification. Abrasive blasting rooms in which on operator is employed shall be classified as follows: 1 . ' Clqss 1. Rooms in which natural sand is nsod as an abrasive or is otherwise introduced into the operation. 2. Gloss II. Rooms in which materials other than natural send ore used as the abrasive and the material being blasted is free of natural send. 12-24.3. A ir flovi requirements. Abrasive blasting equipment shall be pro vided with local exhanst ventilation in accordance with the following require ments for the various types of equipment: 1. Class I rooms baring a length to width ratio of 2 to 1 or less shall . be provided with down draft ventilation of. not less than 80 f.p.m. over the entire projected floor area of the room and shall be exhausted downward through exhaust openings along at least two sides of the roam. The lowest fioint of such openings shall be not more than 10 inches above the' floor ine. Class I rooms having a ratio of length to width in excess of 2 to 1 shall be ventilated either os above or by means of longitudinal ventilation of not less than 100 f.p.m. 2. Class I I mum hnll lie ventilated In the same manner ns Cl I rooms exrrpt Mini vent lint inn hull be provided at 40 f.p.m. nnd 50 f.p.m. rrepcrtivrly. 730 TWELFTH OFFICIA L SUPPLEMENT 3. Abrasive blasting: rooms and tunnels shall be provided with an air velocity of at least 300 f.p.m. through all openings into the enclosure. 12-24.4. Ilotary abrasive blasting tablet. Rotary abrasive blasting tables ihall bo enclosed and local exhaust ventilation shall be provided to maintain lit velocities of not less than S00 f.p.m. through all openings when curtains ore In place. 12*24.5. Abrasive blasting barrels. Abrasive blasting barrels shall be pro vided with local exhaust ventilation to maintain air velocities of not tesa than 500 f.p.m* through all openings. 12*24.0. Abrasive blasliny hand cabinets. Abrasive blasting hand cabinets shell be provided with local exbanst ventilation to maintain air velocities of not less than 500 f.p.m. through all opnnings. 12*24.7.' Abrasive blasting equipment. 1.'Abrasive cleaning equipment shall he constructed to resist abrasion and all joints and connections shall he dust* tight. 2. Openings far admission and removal of air shall be of sufficient area and so located that the air Sow. in the room, cabinet o r device Will be ade quately distributed and will remove the air contaminants created. . 3. Openings fo r admission of air shall be provided with baffles to prevent effectively tbe escape of abrasives into the general room air. 4. Doors and inspection ports shall be scaled to prevent the escape of air' contaminants while tbe equipment is in operation. 6. P its and hoppers connected to abrasive cleaning equipment shall besealed to the equipment end shall, be dust-proof except at such openings as are necessary. 6. Mechanical- conveyors shall be endosad and onneeted to, the exhaust system. 12-24*8. Operation Approved elr respiratory protective equipment of tbe supplied air shall be used by workers employed in abrasive blasting rooms or tunnels. 12-24.8.1. A ir supply. A ir furnished to air line respiratory equipment shall be dean. 12.25. Crushing, milling, screening, nixing and conveying. 13*25J* General prouioiu.. Crashing, milling, screening, mixing and con veying processes creating dangerous <i|r contaminants shall be enclosed and provided with local exhaust ventilation to remove o r control the air contam inants .at the point of generation where practicable. 12*25.2. A ir flow requirements. 12-252J. Crushers and mills. The air flow through hoods pr enclosures used to control elr contaminants created by crushing and milling processes shall be such as to provide minimum air ydocitics through openings as . follows: Light weight dusts: 75 f.p.m. All other: 200 f-p.m. 12-25.22. Screens. The air flow" through openings of endosures of screens used to control air contaminants created by screening operations shall be such as to provide minimum air velocities as follows: lig h t concentration sand: 50 .pjqi. Light weight d olts: 200 f-p.m. Exception: Screens within tight endoanres, 12-2522. fixers. The air flow through mixer hoods or endosures used to control air contaminants shall he a minimum of 150 f.p .u . through necesssaxy working or feed openings. 12-252.4. Elevators. The air flow through openings of bucket elevators shell be a minimum of ISO f.pxn. Ii I'KIWKT.MKNT UK *31 Exception; KmitiPlircs of tight construction may he maintained iicr negativo pressure. 12 25.2.5. Canvcuar belts. Exhaust hoodB at loading and discharge points of conveyor belts shall he provided with following minimum rates of air flow: licit prrrl d ir Flow . f]i to 200 l'.p.m. . Ovrr 200 f.p.m. 150 f.p.m. 200 f.p.m. Whi-rc contaminants are released from belts at points other Iban loading and discharge points belt wipers, enclosure or other control methods shall be provided lo prevent. adissceminiautiuoun of uairr comntaminanits. 12-25-2.fi. .Yctcio or spiral conveyors. Sarli convenors shell be covered with tight covers and exxhhaust hoods providing a minimum air flow or 150 f.p.m. slfall be provided at Cfeoeed or discharge openings. 12-25.2,7. Storage Lins, storage bins shall be constructed and venti lated to prevent the escapa of air contaminants during any stage of the operation ' 12-252.S. Bagging machines. Where practicable bagging machines shall be enclosed as completely as possible ana ventilated at a minimum rate of 100 ,c.f.m. per square foot .of open area in the enclosure for paper bag filling and 200 r.f.tn. per square foot of open area for doth bag filling. Exhausted collecting hoppers shall be provided and so located in relation to the bagging machine its to catch any spilled material. Where the above nietbuds are not as practicable other control ventilation methods capable of preventing dir contaminants may be substituted. 12-252.B. ' Filling .of barrels and containers. Barrels and containers other than' bogs shall be filled in such a manner that air contaminants dis charged ftom the barrel - container are prevented by exhaust ventilation or enclosure or n romtn:...iion thereof from heing disseminated into, .the workroom. 12-2523. Eranch pipe requirements. Branch pipes required for the venti lation of rcrushing, milling, screening, mixing, conveying and bogging proc esses shall be sized to maintain transport velocity or a velocity of 2500 f.p-m., whichever is greater. 1 2 -2 6 / Welding,' brazing,- flame cutting and metallizing. 12-26.1. Gvnerol requirements. Welding, brazing, flame cutting and met allizing operations creating dangerous air rnutaramanis smil be provided with lorul exhaust ventilation to control such contaminants. 12-202. Classes o f operations. Class T. Operations in confined spaces involving toxic metals including but -not limited to antimony, beryllium, cadmium, lead, mercury, selenium or tellurium, .or involving fluorine or any alloy, compound or flux con taining any onu or combination thereof. Class 11. Operations in confined epnees involving metals, alloys or com-- pounds other toon those listed in class I. - Class 111. Operations in nnconfined spaces involving metals, alloys or compounds listed is class I. Class I V / Operations in unednfinod spaces involving metals, alloys or compounds listed in clues II. 12-202. Protection o f operators. ]2-2152.1. Class 1 requirements. Every employee performing aoy class 1 operation shall be furnished and shall use an approved sir-line respi rator r supplied air helmet, and the confined space shall be ventilated at a niinbtiuni rate or 60(1 r.f.m. per operator insidr the enclosure. 12-262.2. Ciuss 11 requirements. In every class II operation the con fined space shall he ventilated et a minimum rate of 100 cf.m. per square ' 9ssss .-rjv ~ "3sr %' 'rVicV-.-tsVip.r4n5.V- 732 TW ELFTH OFFICIAL' SUl'i'LEM ENT foot of floor area inside the enclosure, or ever? employee required to work within the confined space shall be famished and shall use an approved air line respirator or supplied air helmet. 12-26.3.3. Class I I I requirements. Protection of employees performing doss I I I operations is required at all. times when portable equipment is used in flame cutting or welding lead,'or other metal plated or otherwise coated with cadmium, zinc, lead or lead containing compounds. Other class 111 operations shall bq provided with protection o f a type required' by artielc 12-9. Where conformance to such provisions is not practicable' the employer shall furnish and the employee shall wear an approved respirator, any other provision of this rale notwithstanding 12-26.3.4. Ciati I V requirements. Every, class IY operation at a fixed location os port o f a production''process shall, be provided with local vxbaust ventilation where practicable. All other class IY operations shall he provided with dilution ventilation-.- ` Exceptions: The following elaas.lV operations are excepted from the above requirements: 1. Spot welding; 2^' p'ytions which aro' net uuol shoppractice; 3. out-of-door operations. o.-" v \ 12-26.4. . Local exhaust ventilatici; [for toiidmy, etc. Local' exhaust venti lation shall be by one of the following means:., r -. ' L Fixed or movable hoods located as neiir. as praeticable to the opera tion with a rate of air flow sufficient to maintein a.velocity in the direction of the hood of 100 f-p.m. at the welding are when the h ijd is a t its most remote distance from the arc. The' air Volume find, duct size required .'to maintain the velocity when a properly flagged hofid(i.e., a flnge .width equal to one-half , the connecting /duct ' diametor but not less than three inches) is a( various distances from,the arc shall be as follows: ' ^Distance Volume* rejuired fC S M .J D uct. diameter 4" to 6" 150 2% " to' B&" 6" to 8" 275 8" to JO" 425 10" to 12" 60.0 "Add 20 percent to required air volume for' nhfiaoged hood. 2. An enclosure closed on top and open on not more than-.two. sides in which the welding is done and which shall he provided with bn air flow * sufficient to maintain a minimum inward velocity of 50 f.p jn . through all . open areas of the enclosure. . 12-27.. Exhaust gases from motor vehicles operating In. confined areas ;, 12-27.1. General provisions. Confined iixbas m ' which'motor vehicles are operated and releasing dangerous air, contaminants shiall.be provided with means to remove or control thd fumes','gases or vapors released ,or diasasceiumAiun&awtesud. '-1: .7v-. ' . >' , .'aV 12-27.2. VeniiToturo o f servicing Ideations. . Each ^servicing location'shail -be provided .with a duct which is part of .an qxhaust ajpstetti discharging out- of-doors. The inlet end shall either slip .over the tail .pip e/o fth e engine of the equipment being serviced or shall be provided `with 'a hood large' enough to slip over the tail pipe or any deflector attached thereto. .Ventilation shall .' be provided at n rate acceptable to the. commistfpqer but in no efcse shnlltbe - air flow be less than 100 c.f.m. and the '.flexible pipe diameter leas'thah ' three inches. ."'Xv. ,. " 'Y y ; Exception: F o r servicing locations handling hot more than two vehicles h duct system conforming to the following may be suostiluted for a mechanical exhaust system: ` L The inlet end of the duet shall fit tightly over the tail pipe .of the ' engine being serviced, and I OKI'AKT.MK.VT 1<K 1-AlSUIf XI H. Tin1iluri h'im li fIciII nol eim.ftl 1!U Iccl, and 3. Tin- ilimi ilinindrr slin II In- of Ilie smile diameter us tile tail pipe Is ivliirll it Is i*itilinai*lml. mui \ ). Tin' tltii'i nuili'i li.-i11 li'riiilimti' mil-oC-ili'iirri, ami 5. Tin- ilu.'i hlnill In* ftiiiflrui-lfil uml iimiulnmcd j'aslijrhl. 3S-U7.il/ it ,ii/ijntl mil /ti/" ixhiiittl M/hfern. Synti'iiia having ti11 to Imir liranr.lii .4 iniviileil with nuitimaiic cloning m'eva shall lmvi* a rujiin-iiy eiiunl tu tlit- nnnl number of brnm-hrs. System having more than lour brnnrlir providi'd with iiuluuialie clusiuR donees sliuli btive u capacity 11)11:11 in jour Ina indita pins 6u percent of the enpucily of Uiu number of bnim-in- in rsre.-u of four. " 3H-S7. 1. Cupoi-il!/ uf micaiyjftr tail pipe cxhtnisl syslema. Where tail pipe I-miiflu-s an- upen iOh-ii not jii use, the capacity of the system shall be based tut the ttiini number of branches connected to the system. 12/28, Severability. 'If any provision of this rule or the application thereof to an}- person or rin*uin.*J!aiif/a is bold invalid f such invalidity shall not tLfect other provisions or npplimitione of this rule 'Which etm be given effort without tlie invalid prtivir-imi : upplicniion mid to .this and* the provisions of ilit i-ule are de.'lnriil In hi-si'ver.ible. 1 2.2 9 . . Martmnm- allowable concentrations--evidence of dangerous air contaminants. The nxicteticu of air contaminants eonsding- of or deriving from the siilistnui'i's tinnuil in tlie fnU<ftrlflir table in relative quantities greater linn llinin' set furtii ur lu each aubi-iTmee shall (-oustitnte priiun-fucie evidence lint mtrh roiirimiinnnls are dniiji.'rtm* air roulamiimiits. Priuio-furio evidence as .u wlietlicr other air enulnminimtiji or other concentrations than those set .forth in the follmviug table n.iisiihiic dangerous nir contaminants by rrason of their. sUii'iiic in iiitimliiii'a (ciuliup (u injure the health of employees shall include in npiiiioii by.'ti plii-sii-iun (o tlmi effect ns a mutter of sound clinical judgment. Substance A. Gases and Vapors I'artj per million Acetaldehyde ............................................................................................ ' Acetic acid ................................................................................................ Acetic anhydride .................................................................................... Acetone ...................................................................................................... Acrolein -.................................................................................................... .Acrylonitrile .............................................................................................. Allyl alcohol............................ Allyl propyl disulfide ............................................................................. Ammonia ................... Amyl acetate .......... Amyl aleobol (isoanyl alcohol)............................................................... A niline,.............................................................................. .'................ Arsine ' ....................................................................................................... Benzene (benzol)........'...................... .......................... ....................... Benzyl chloride ........................................................................................ Bromine .................................................................................................... Butadiene ............................................................ Butanone (methyl ethyl Icelone) ............................. Hutylseetate ............................................................................................ Vutyl alcohol ........................................................................ Butyl amine ......................................... ................................................... 200 30 3 1000 0.5 20 5 2 100 200 100 5 0.05 35 1 1 1000 250 200 100 5 So lo criminal. A pp.rm llj ikould be "end". liKIMKTMK.VT UK LAHOII A. Cases and Vapors-- (C otitd.) Siibslmirr Parts per Million hylene mine ........................................................................................ 5 liylcne oxide .......................................................................................... 1OH ui'irine ...............................................'......................... ....................... 0.1 uorotriclilnromrthinir ..................................................................... 10UI1 irmaldchyde .....................................................................'.................... 5 . irfural ............. S irfnryl alcohol ........................................... SOU isolinc ................................................................................................... 500 ptane ..................................... .............................................................. SOU Stuie ......................... 500 2XAnouo ........................................ 100 none ..................................................................................................... 100 rdrazuie ............... .................. ...................................'.......................... 1 yrtrogcti bromide ......................... 5 ydrogeu. chloride ..................1............................................................. 5 ydrogen cyanide .................................................................................... 10 ydrogen -fluoride ........................................... 3 Iflrog-eij peroxide.................................... . . . . . . ..................................... 1 ydrogeit sclemdc -.................................................................................. 0.05. ydrogeii sullide ............................................................................................. 20 'dine . . . i ' . ................................................................. '.I.'....................- 1 ophoroni .............................................................................................. 25 S ylaininc' ............. 5 oxide .'.......... ....................... ....................................................... ` 50 ethyl- -iertate .......................................................... 200 . ethyl occtvlede ...................................... '1000 ethyl alcohol' ........ '. .............. ..................... ........................... '.......... 200 rthyl bromide ....................... 20 ethyl cellosolvc 25 ethyl cellosolvc acetate ............... 25 ethyl chloride-........................................................................................ 100 rlhyl isobutyl enrblttol {methyl nnyl alcohol} ................................. 25 ethyl itiercaptnn' ......................................................................'. .......... 50 rthylol '(dimcthoxymcfhnnr} ....................................... '..................... 1000 ethyl chloroform .......... ................................................ J...................\ 500 cthylcyclohcxnnc . . . ; ............................................................................ 500 cthylrj-clohexnnol ............'.................................................................... 100 cthyteyclbhcxanmie ..................................................... 100 ethyl formate ..............................................................."....................... 100 ethylene chloride ....................................... ......................................... 500 aptha* (coal tar) ................................................................................ 200 apthn" (petroleum) ............................................ 500 ickel carbonyl ................................. 0.001 I'itroanilinc' . . . '........ '. ........................................................................ 1 itrohenzenc .................... 1 ilroetliane** ............................................................................................ 100 itrogvti dioxide ..................... 5 itriijrlycerin ................................. 0.5 iirmncthane .........'................... 100 ln ApBnronUr.thould be '`niinhvhi" . 5q in oHfflnat..Aupai^ntty should be-?*nllroelh*mi**. II ",J"S.*' * 1 'i'.V a. B . T o x ic ' D u tu , F u m e t andMieta Substance MiUiramj ver Cubic Meter Aldrin ................. Ajomale ....................................................... Antimony ............................................................................. Arsenic .............. ............................. .......................................................... Borina (soluble camponods} ............................ . ............. : ............ Cadmiala ' .......... ............................................... ......................................... Calciala a r s e n a te .................. .'....................................................... ............' Chlordone .......................... ....................... .-............................................... 0.25 16 0 0J lU . 0J .2.0 0.5 i liKI'AltTM EXT OF i-AHOll 737 li. T<ixir Ditata. F um ea and Mais-- ( C o n iti.) MHlgrnnn jirr Cltliir Mrtrr hli.rinair.l <i>j>in'iiyl o x iilr ..................................................................... 0.5 hlurodiphi'r.y! . . ............................................. 1 bruniip ami alni rhroiiiules hs Cr 0) rag hnrfiio.il- ....................... ...................................... 0.1 15 yanidu t ' X . . ; .................................................................................... *+[1 rJ..4 i!iHil..riip1ipmixyiiprtlt; arili) ............................................. li I 11 OT (2'. 2: fu#- 1 i.-cliluiujjhfnyl)-!, 1, l-trii-lilunlliam*.................. 2 inldrn ... ..................................... .......................................................... 0.25 inicrotoluem- ........................... 1.5 initrD-o-rp.*N.>r ............................................................................... 022. :PX.{p.iliyl-p-titrophcnVl Ihiono bemrnc phosphonatr) .................. 0.5 prm vftiiudnini ilusi ....................................................... .................... luoride ..................................... lydroqUinpnc . . . ' .................................................................. 1 2.5 2 ron oSiitp .fumo ............ ................. ..............V........................... 15: r^d .................... 2 .....................'....................................... '............. 0.15 nw arsenale .............................................................................. 0.2 iridane . .......................... .............................................. ; ................... 0-5 fogrrfiujn -.i.ixi'iIl*' uiiip ........... ialnlhon ....................................................'............................................... 15 15 [ongancsp ..................................................................... , ...............' . . . . . 6 fpthoxychlor ........ v ................................................................................ 15 I r m i r y ............................................ 0.1 fnfybdpntm; (sl tibie compaurids) ......................................................... 5 tolybdennm . (nnluble cptnpnnds) ................................................... 15 ir^tit flierpurials (as rnreurv) ; ......................................................... 0.01 amthiqn ;V. . . . . . . 1.. .*r........................................... -.................. 0.1 'rntarhioroneplUbaicnc . . . . . . ; ............................................................. 0.5 pnfafhlomphrnol ..................................................................................... 0.5 'hnaphors' jypllbw)V.'............................................................................' 0J. hospliorus\'ppri^achlofide ' . . . . ' ............................................................... 'hoRphonin. prntasulfide .v ..................................................................... 1 1 iene rid .. .. .. .........................................................; ................. 0.1 rlmiurfi rompounds (as Sci ................................................................. 0.1 ndiuih ihvilroxidp ..................................................................................... 2 ulforic w id ................... I KDP, ; (toiraethyl dithiono pytophosphalc)' .......... '.......................... 022 pflurium i ...................... ..................................................;.................... 0.1 EPP (tetraetbyl pyrophosphatr) ...............................- ................... 0.05 ni (2) 1. 0-1 rinilinplipnyl.iiiptjtjdnifrnmille) .................................. 1-5 ilanium dinxidr .-............................................. '...................................'. 15 ncfalnronaphihali'ni' ............. .5 ntiii riii filuftu" . . ................................................................................... 1-5 "unitim I--ululili4 nimjirinnilrt) ............................................................... IU15 riiiiiuut l iiifnlnhlp riimpriitmla) .........................................................- 0.25 muniiuni i V. (li- iluHi ) ........................................................................... 0.5 ainnlmili (V . M. fu rih*) ......................................................................... 0.1 iir nsiilr ftanip (iir 7.n\ ............................................................ rm iiiuiH ............ ...................................................................................... M jj 73H TWELFTH OFFICIAL SUPPLEMENT Substancr C. M inral D usts Million' Particles per Cubic Foot * Alundura .................... ............................. Asbestos .................................................. Csxborundnra (silicon carbide) ......... Dust (nuisance, no free silica) .............. Mica (below 5% free Sj 0,) . . . . . . . . . 'Portland cornent .......... ; ........................ Talc ................................................... Silica: Chus I (below 5% free SL0,) Clem I I {5% to. 50% free S, 0,,) Class I I I (above 60% free S| 0,) Slate (below 5% free Sj 0,) .................. Soapstone (below 5% five St 0X) .......... Total dust (below 5% free S, 0 , ) .......... 50 5 50 50 20 50 20 50 20 5. 60 20 50 "Mote: Using: tbe light field low-power method of counting os described in U. S, Public .Health.Report 47 No. 12, March IS, 1932 pp. 669-672 or its- equivalent, and a standnrd-type impinger or other equivalent instrument for taking atmospheric dost samples. i B t s t i n f Sfcui ? n r k \ DEPARTMENT OF STATE) EXHiBrr CC f'- 3 / 0 3 t ta crthg Ctrtlfici), the attached is a true cooy o f T i t l e 12 NVCRR F a rt 12 f i l e d w ith th e Hew Y o rk -S ta te D eoartr.ent o f S ta te on Auaust 1 , 1958 and e f f e c t i v e November 1 19 5 8 . ---- ----------- 1 312101-019(3/13) February *** nHu^maW(i; e ia h ty -n in e THIRTEENTH OFFICIAL SUPPLEMENT TO THE OFFICIAL COMPILATION OF CODES. RULES AND REGULATIONS OF THE STATE OF NEW YORK January I . 1957 to December 31. 1958. Inclutive CAROLINE K. SIMON 5ccrcUrr f S u it VOLUME I 1961 g r . T>.I-T--ZZ. DEPARTMENT OF LABOR liquids ire being applied or stored s t least'one hand fire extinguisher approved for the control qf flammable liquid fires. Extiofuiihers containing carbon tetraehioride. methyl bromide or other toxic material are prohibited for this uiare. In addition there shall be at least one approved extinguisher for each 2.500 square feel of floor area so located that a person shall noc have to travel more than 50 fleet to reach the nearest extinguisher. Ex tinguishers ska!! be easily accessible and protected from injury. 12*37. Evidence of dangerous a ir contam inants. The existence of s ir contaminants enlisting of or deriving from the substances named in the following taoie in relative quantities greater than those set forth as to each substance shall; constitute prim s facie evidence that such contami nants are dangerous air contam inants, Prim s facie evidence as to whether other air contaminants or lesser concentrations than those set forth In the following table constitute dangegoua air contaminants by reason of th eir existence in quantities tending-to in ju re'th e health-of employees shall include an opinion by a physician to that effect as a matter of sound dinieal judgment. C ciei and V apon A. Sttlticnrr Parti p*r Million Acetaldehyde ` ' 200 Acetic acid 10 Acetic anhydride 5 Acetone 1000 Acrolein 0.5 Acrylonitrile 20 AllyI alcohol 5 Allyl propyl disulfide 2 Ammonia 100 Amyl acetate 200 Amyl alcohol (Isoamyl alcohol) 100 Aniline 5 Arsine 0.05 Benzene rbenxol'. Benzyl chloride Bromine Butadiene Butanone \methyl ethyl ketone) Butyl acetate Butyl alcohol Butyl amine Butyl eellosolve Butyl mereaptan 25 1 1 1000 250 200 100 5 200 10 Carbon dioxide Carbon disulfide Carbon monoxide Carbon tetrachloride Cellojolve Cellosolve acetate . Chlorine Chlorine trifluoride 5000 . 20 100 25 200 100 1 0.1 A. S niJtonc Chlorobenzene l monochlorobenzene 1 Chloroform 1-Chloro >1. nitropropane Chloroprene Cresol fall Isomers > Cyclohexane Cyclohexanol Cyclohexanone Cyclohexane Cyclopropane 'Diacetone alcohol DIborane o-Dichlorobentene Dichlorodifluommethane 1 . 1- Diehlcroetkane. . 1. 2-Diehloroethylene Dichloroethyi ether Dichloromono Auoromethane 1 .1- Dicbloro >1<nitroethane ' Diehlorotetrafluoroethane Diethylamine Difluorodlbromomethane Diisobutyl ketone Dimethylaniline Dimethyls.ulfate Dloxane (.diethylene dioxide 1 Ethyl acetate Ethyl aleohol (ethanol < Ethylamine Ethyl benzene Ethyl bromide J SmifcHVxsiW"ivu>' THIRTEENTH OFFICIAL SUPPLEMENT A. /.iiinrr Ethyl chloride Ethyl ether . Ethyl formate Ethyl mercaptan Ethyl silicate Ethylene chlorohydrin 'Ethylene diamine Ethylene dibromide Ethylene dichloride Ethylene mine Ethylene oxide Purl* per MiWm IWO 400 100 250 100 5 10 25 100 5 100 A. Naptha* (coal t a n Naptha* (petroleum Nickel carbonyl p-NttroanUlne Nitrobeniene Nltroe thane Nitrogen-dioxide Nitroglycerin Nitromethane 2-Nitropropine Nitrotofuene Part Mtl Fluorine Fluoroirlchloromethane Formaldehyde Furiurxl F u riuryl xleohol Gasoline ' Heptane Hexene Hexenone Hexone . Hydrazine Hydrogen bromide Hydrogen, chloride Hydrogen cyanide Hydrogen Auoride Hydrogen peroxide Hydrogen selenide Hydrogen.sulfide 1 Iodine Isophorone Isopropylamine Mpsityl oxide Methyl .aeetste Methyl acetylene Methyl alcohol M...ethyl bromide Methyl celiosolve Methyl eellosolve acetate Methyl chroride Methyl isobutyl earbinol t methyl amyl alcohol) Methyl mercaptan MethyUl t dimethoxymethane) Methyl chloroform Methylcj'ciohexane Methyteylohexanol Methyleydohexanone Methyl formate Methylene chloride .I 1000 s 5 200 500 500 500 100 100 1 5 5 10 . .3 1 0.05 20 1 25' 5 50 200 1000 200 20 25 25 100 25 50 1000 500 500 100 100 100 500 Oetane Ozone Pentarie Pentanone Perchloromethyl mercaptan Perehlorethylene Phenol Phenylhydrazine Phosgene Icarbonyl chloride > Phosphine Phosphorus trichlond: Propyl acetate Propyl alcohol f Ispropyl alcohol Propyl e th ..(isopropyl ether> - Propylene dichloride Propylene imlne Pyridine Quinone Stibfne Stoddar,d solvent Styrepe monomer (phenyl ethylene Sulfur dioxide . Sulfur hexaAunride Sulfurmonochloride Sulfur pentafliioride ( p-Tertlary butyl toluene 1. 1.2. 2 Tetrachloroethane Tetrahydrofuran Tetranitromeihane Toluene o-Tnluidine . Trichloroethylene Trlrtuorr-Tnonohruniumethane Turpentine Vinyl ehioride. (chloroeihenei Xylene Siili m iiiu L aepamilr (fcWS h "Hirtik* 892 THIRTEENTH OFFICIAL. SUPPLEMENT C. Substance Mineral D utii Million. Particlet per Cubic Foot* Asbestos Dust (nuisance, no free silica; Mica (below.S^c free SiOii Portland cement S ilica; Class I ibelow 5*^ free SiO it Class II 'S 'T to 50*7 free SiO< Class I I ] .`above 50**free SiO) Slate i'belou'5'T freeS iO n Soapstone (below S 'e free SiO.) Tale Total dust (.below 555 free SiO.) '5 SO 20 SO 50 20 S SO 20 20 50. * S e t t : C lin t the light field low-power method of'counting as described in U. S. Public Health Report 47 No. 12,.March 15, 1932. pp. 0-672 or its equivalent, and a standard type impincer or other equivalent instrument for tak in t atmos pheric dust samples, 13-22. Approved devices or materials. Any device or material the board has approved pursuant to section 27a of the Labor Law foi complying with this rule may be so used ss If by th is rule specifically i laed any other general vr special provision of this rule notwithst: 12-2V. Severability. If any provision of this rule or the appl thereof to any person o r circumstance is held invalid, auch invalid! not affect other provisions or applications of this rule which can b effect without the invalid provisions or applications and to this provisions of this rule are declared to be severable. Industrial Code Rule No. 14-- Construction, Installs Inspection and Maintenance of Steam Boilers 1 4.1. Qualification and commisaioning of Inspectors. 14-5.1. (As amended November IB. 1958; effective November 18 filed November 25.1958. Statutory authority iiST-a, 23. 29 and 204 Law ;. Upon recommendation of the examining board, a certificate petencr and commission as an inspector of steam boilers shall be is the industrial commissioner to persons at least 25 y ean of age whe the employ of insurance companies, who successfully pass a written nation as to their knowledge of the construction, installation an tenance of e'esm boilers and their appurtenances. Candidates taki examinations must hav* h id five y ean of practical satisfactory e r in bollermakinr. boiler installation and inspection, or boiler shop ] or operation and maintenance of steam boilers. Technical educatiin proportion to its value, be given credit as equivalent to experi to exceed two years. Such examinations shall be conducted by an ex board appointed by the industrial commissioner, which shall be e of one representative of eaeh of the following Interests: bone faetu ren . insurance companies, operating engineers. Bureau of B speclion of the Department of Labor and such others as the h commissioner may designate.