Document 6b3dgNbyOOaB6jaGaqOBp9Zbd

>V:irn.nc S'^r.s xra. Lights * II [uni: net: is n Drive Pi>Iley. Bottom iboot) Pulley ai*d Clearance. Pulley Supports. Motor. Driving Mecl:aniiiv. Brake. Electrical S^ritche* Vibration and Misalignment. "Skip'' on up or down run when mounting step indicating w orn gears). (3) Inspection log. A written record shall be kept of findings at each inspec tion. Records of inspection shall be made available to the Assistant Secretary of Labor or his duly authorized represent ative. [Sovrce: ANSI AOO 1-1960 Safetv Code for Maul if i 137 FR 22102, Oct. 18. 107'. as amended at 38 FR 16233. June 21. 13731 1910.6ft Nairn*1,2of slamlanN. Sec. 1910 66 1310 67 1910G6 Sca.rce ANSI A 120.1-1970 Safety Code for Powered Platforms for Exterior Building Maintenance. ANSI A92.2-1369. American National Standard for Vehicle-Mounted E.V'.atlne and Rotating Work P'..i'Pcr.s. ANSI A no. 1-1369 Safe tv Code for Manlift.-. 1910.70 >Mi:il,irch organiralion?. Specific standards of the following or ganizations have been referenced in this subpart. Cop'es of file standards may be obtained from the issuing organization. American National Standards Institute, 1430 Broadway, New York, NY 10013. Subpart G--Occupationc-1 Health and Environmental Control 1910.93 Air ( ( jitimirnaril?. An employee's exposure to any mate rial listed in tabic G-l, G-2, or G-3 of tiiis section shall be limited in accord ance uich the requirements of the follow ing para Graphs of this section. a > Table G-l. <I> Ufaterich :eifh names preceded by C"--Ceiling Values. An employee's ex posure to n:.t 'laieri.il m table G-l, the name of w.uvh is preceded by a "C" ie.g., C Boron trdlu.-.dei. shall at no time exceed tr.e ec.i.n.z value given for that mate: i.ti :n t.'.e table >2' G:; ",';.'c":ci--S-iioxr time '..f'.ahted An employee's expo sure to aitv :.ul m table G-l, tire name of which is not preceded by "C", in any 8-hour work shift of a 40-hour work week, shall not exceed the 8-hour time weighted average given for that material in the table. (b) Table G-2: (1) S-ftour time weighted averages. An employee's exposure to any material listed in table G-2, in any 8-hour work shift of a 40-hour work week, shall not exceed the 8-hour time weighted average limit given for that material In the table. employee is subject to the toiler ns exposure: Two hours exposure at 150 ppm. Two hours exposure at 75 p p :n Four hours exposure at 50 p.p.m. Substituting this information in the formula, we have 2X 150--2x75-4'''50 -- ----------------------------------81 25 p p m and or technical measures u.-ed fer this purpose must be approved for each par ticular use by a competent indmtnal hygienist or other technically qualified person. Whenever respirators are used, their use shall comply with j 1910.134. T lie R It 1 (2) Acceptable ceiling concentrations. An employee's exposure to a material listed in table G-2 shall not exceed at any time during an 8-hour shift the ac Si., e 81.25 p.p.m. is less than 100 p.p.m., the 8-hour time weighted average limit, the exposure is acceptable. AM..: 1.1 I,:,-.... Ac. TI,- ,,,-l. .. .VtWi," .i".'.V'lt 1-V. Afi tui'''......... ceptable ceiling concentration limit given for the material in the table, except for a time period, and up to a concentration not exceeding the maximum duration and concentration allowed In the column under "acceptable maximum peak above the acceptable ceiling concentration for an 8-hour shift". (3) Example. During an 8-hour work shift, an employee may be exposed to a concentration of Benzene above 25 p.p.m (but never above 50 p.p.m.) only for a maximum period of 10 minutes. Such ex (2) (i> In case of a mixture of air con taminants an employer shall compute the equivalent exposure as follows: Where: c, c, c, E,=--f--+ . . . -- L, L. L,, E is the equivalent exposure for the mixture. C is the concentration of a partictii.tr con taminant. L Is the exposure limit for that contami nant, from table G-l, G-2. or G-3. At.'lvVjr ilii't V;; If* >' < 1 : 1 ud L'T'i . Aivt\ p s.v u A rv)-. i U .. At'.N-i'i. .. Ai't> 3 iS"iAr' -k", . Ai'i v im iti ^ki-.............. .V i'.t 'km. All's l,.> h.>3 A.!) I of p'n'If... *V All's.dvuhlr!:r , \>i\ Vi'11 ' .`-A' ''1 . i\ Uni, ?- Vi -1" i1 j. ii__ : \'w.'it-s']f.- ** \ ' n,n . , " n' ir.; M.c'KV d- 1 'Sr & posure mast be compensated by expo The value of E,, shall not exceed unitv sures to concentrations less than 10 . (lh ? . \ s; -) .i... A 1 , 'k.,. p.p.m. so that the cumulative exposure . tiii To illustrate the formula pre A'.V for the entire 8-hour work shift does not ; scribed In subdivision (i) of this sub- V '-1 exceed a weighted average of 10 p.p.m. (c) Table G-3: An employee's expo paragraph. consider the following exposures: sure to any material listed in table G-3, in any 8-hour work shift of a 40-hour work week, shall not exceed the 8-hour time weighted average limit given for that material in the table. (d> Computation formulae: (1) (ti The cumulative exposure for an 8-hour work shift shall be computed as follows: E = C.r + (riT'*+ . . . C7N : Mu ,-r.i! A.-in . . '.term.,:. '('-li,,|>I -.1..... w. i.-'e.,| :li-, : . ' ....... I - i.u a A .T it'!,. l,-li 2 Punuim,' i T ,(>:, i; -11 'li'lH.m,, iT.it>!,- t;-3: Nil |, | IS S' l> ID l> f>. I.'X A" . i A" I' I> ' .. Substituting in the formula, we have: I'! ] IlN-TS., *' \ HI Is ,-1's ' sinlu>-l,s Os)" ! -' | l > ii't-.'jiriM'-s. <* i;t,, I'll If Jn . . \ il>': j,',-.... J j;*1 < <(t J. s-. , ] *^IJi'4t -n ' . U>;(i ,',nl A, s-w 1 l'.'r ....................... t' l-n ni- 11 li'ril t:i[i'. Tl'V -a ... \ s . ' - 'kl , . where: 8 500 45 40 1.000 200 200 `if f i'i.............. . liiir tv ii'i'... : Kik.sav ,s. nf ; r, E Is the equivalent exposure for the work ing shift. C is the concentration during any period of time T where the concentration remains constant. T is the duration In hours of the exposure at the concentration C. The value of E shall not exceed the 8hour time weighted average limit in table G-l, G-2, or G-3 for the material involved. fii' To illustrate the formula pre E- =0.500 V0.225 r 0 200 E-, -0.925 Since E-, is less than unitv (l. the expo sure combination is within acceptable limits. id To achieve compliance with iianeraph ia> through id> of this seenon, administrative or engineering controls must first be determined and imp'.euieuced whenever feasible. When such controls are not feasible to achieve full compliance, protective equipment or a::v \ I -V i' , T iT-s ' *'-!inr- ' I, - <s`v- K. t tits 7 ''As',"s' > I WO.. T'V%. l * > Hii'v ,.l ' -f-i'-;"s I i: n. -1 .. ' t ` scribed m subdivision (i) of this subpara other protective measures shall be used graph. note that isoarnyl acetate has an to keep the exposure of employee-: to 1 S-hour time weighted average limit of contaminants within the limits pre-