Page:NIOSH Manual of Analytical Methods - 1501.pdf/6

 HYD RO CAR BO NS, AR OM ATIC : MET HO D 150 1, Issue 3, dated 15 M arch 200 3 - page 6 of 7

TABLE 2. PERMISSIBLE EXPOSURE LIMITS, PPM NIOSH

ACGIH mg/m3 per ppm

OSHA TWA

TWA

C

1

0.1a

1

10

10

50 (skin)

50 (skin)

ethylbenzene

100

100

125

100

125

4.34

"-methylstyrene

100

50

100

50

100

4.83

$-methylstyrene

100

50

100

50

100

4.83

toluene

200

100

150

50 (skin)

o-xylene

100

100c

150

100

150

4.34

m-xylene

100

100

100

150

4.34

p-xylene

100

100

100

150

4.34

styrene

100

50

50

100 (skin)

4.26

Substance benzene p-tert-butyltoluene cumene

STEL

TLV

STEL

10b

3.19

1

6.06

50 (skin)

4.91

20

100

3.77

a

Potential carcinogen Suspect carcinogen c Group I Pesticide

b

a

TABLE 3. SAMPLING FLOWRATE, VOLUME, CAPACITY, RANGE, OVERALL BIAS AND PRECISION

Substance benzene

Sampling Flowrate Volumeb (L) (L/min) MIN MAX
 * 1) 0.20

5

30

Breakthrough Volume @ Concentration (L) (mg/m3 ) >45

149

Range at VOL-MIN (mg/m3 )

Bias (%)

42 - 165

Overall Precision (ÖrT )

Accuracy (±%)

-0.4

0.059

11.4

c

p-tert-butyltoluene


 * 1) 0.20

1

29

44

112

29 - 119

-10.3

0.071

20.7

cumene


 * 1) 0.20

1

30

>45

480

120 - 480

5.6

0.059

15.2

-7.6

c

17.1

c

ethylbenzene


 * 1) 0.20

1

24

35

917

222 - 884

0.089

"-methylstyrene


 * 1) 0.20

1

30

>45

940

236 - 943

-7.6

0.061

16.9

$-methylstyrene


 * 1) 0.20

1

30

>45

940

236 - 943

-7.6

0.061

16.9

toluene


 * 1) 0.20

1

8

12

2294

548 - 2190

1.6

0.052

10.9

xylene (o-,m-,p-)


 * 1) 0.20

2

23

35

870

218 - 870

-1.2

0.060

12.2

styrene

<1.00

1

14

21

1710

426 - 1710

-7.9

0.058c

16.7

a b

c

Minimum recommended flow is 0.01 L/min. VM in = minimum sample volume @ OSHA TWA; VM a x = maximum sample volume @ OSHA TWA Corrected value, calculated from data in Reference 5.

NIOSH Manual of Analytical Methods (NMAM), Fourth Edition