Document qaxJv86e219LBpgm41w22D7Nk
to d/C
Threshold Limit Values For 1966
RECOMMENDED AND TENTATIVE LIMITS
Adopted at the 28th Annual Meeting of the American Conference of Governmental Industrial Hygienists, Pittsburgh, Pennsylvania, May 16- 17, 1966.
j
LAM021601 B0G3209
6113 18458
RESPIRABLE DUSTS EVALUATED BY COUNT
$ub*VCU
m. p. p. c. f. *
SILICA
Crystalline
Quartz, Threshold Limit calculated
from the formula...........................
Cmtooalite
M
Amorphous, including natural
diatomacoous earth............................
250 ** bSi 0 a + 5
20
SILICATES (less than 1% crystalline silica)
Asbestos...........................................
5
Mica...................................................
20
Soapstone .........................................
20
Talc....................................................
20
Portland Cement...............................
50
CftAPHITE (natural)
. ..
15
**lnerf* or Nuisance Particulates 50 (or 15 mg m3
whichever is the
see Appendix D
smaller)
(actors
mppef x 35.3 = million oarticles oer cubic meter = particles per c. c.
* Militant af partlclas par cubic (eat of oir, bo sad an implftfar sample* countad by lgbt-(U<d tocfcmc*.
*" Tba parcantapa a( crystalline silica in hs (anauio is dip smsunt dstarmlnad (ram ir-b*m* saiaplas. PPPPet IP Olppp Inprpncpp in vOllch plhpf mpPiPp, Kppp bppn iHpwfi Ip bp ppplicpblp.
TENTATIVE VALUES
These substances, with then corresponding tentative limits, comprise those for which a limit has been assigned for the rirst time or for which a change in the `Recommendetf listing has been made. In both cases, the assigned limits should be considered trial values that will remain in the ten tative listing for a period of at least two years, during which
time difinitive evidence and experience is sought. If accept able at the end of two years, these substances and values will be moved to the RECOMMENDED list. Documentation t for tentative values are available for each of these substan ces. l
I Subptpncp
ppm*
Acrylamide Skin
- 0.3
2-Aminoppndine ...........................
0.5 2
sac-Amyl acetate.................................................. Azinphos-methyl-Skin
125 650 - 0.2
Bromotoim-Skin............................
0.5 5
n-Butyl acetate...............................
150. 710.
sec-Buty! acetate...............................................
200950
tert-Butyl acetate ..............................................
200. 950.
++ sec-Buty! alcohol ............................................ Cadmium (Metal dust and soluble salts)
150.450. - 0.2
Carbon Mack................................................
- 3.5
Carbon monoxide............................................ ++ a-Chloroacetopnenone (phenacylchlonde)
50. 55. 0.05 0.3
o-Chloiobanzylidene melononitrile (OCBM1
.05 0.4
C Chlorine ......................................................... + Chromium, sol. chromic, chiomoiis salts.
1. 3.
as Ci .........................................................
- 0.5
Metallic & insol. salts ...........................
- 1.
Coal tai pitch volatiles (benzene soluble fractionl (anthracene, BaP, phenanthiene,
acridine, chrysene,pyrene)................... ++ Cobalt, Metal fume idust.........................
- 0.2 - 0.1
Ciotonaldehyde .......................
2. 6.
i
Cumene Skin ....................... Cyclohexane....................................................
50. 245. 300. 1.050.
Cyclohexane....................................................
300. 1,015.
i Oiazomethane.............................................. C 1,2-OiMomo-ethane-Skin ...........................
0.2 0.4 25. 190.
+ Oibutyl phosphate.....................................
1. 5.
+ Oibutylphthalate.......................................... Oiethylamino ethanol-Skin..........................
- S10. 50.
++ Olisopropylamine-Skin ................................
5. 20.
Pert* el vpppr pr pep ppf piIIIIpa part, p< plr plw vpppr bp ypIupip Pi 23"C Pft0 700 mpi. H, prpppprp. '
*# A,pxip|p pnllijrppi. pi pprticulatp ppr cubic
mpfpr pi plr.
4 1966 Rpvision ++ 1966 Additione