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Occupational Health and Safety Act, 1993 (Act No. 85 of 1993)

Regulations

Hazardous Chemical Substances Regulations, 1995

Annexure 1

Biological Exposure Indices

 

 

 

Acetone

Determinant

Acetone in urine

Sampling Time

End of shift

BEI

100 mg/l

Notation

B , C

 

Aniline

Determinant

Total p-aminophenol in urine

Sampling Time

End of shift

BEI

50 mg/g creatinine

Notation 
 

C
 

Determinant

Methemoglobin in blood

Sampling Time

During or end of shift

BEI

1.5% of hemoglobin

Notation

B, C, D

 

Arsenic and soluble compounds, including Arsine

Determinant

Inorganic arsenic metabolites in urine

Sampling Time

End of workweek

BEI

50 mg/g creatinine

Notation

B

 

Benzene

Determinant

Total phenol in urine

Sampling Time

End of shift

BEI

50 mg/g creatinine

Notation

B, C

 

Benzene in exhaled air:

Determinant

Mixed exhaled

Sampling Time

Prior to next shift

BEI

0.08 ppm

Notation 
 


 

Determinant

End exhaled

BEI

0.12 ppm

 

Cadmium

Determinant

Cadmium in urine

Sampling Time

Not critical

BEI

10 mg/g creatinine

Notation 
 


 

Determinant

Cadmium in blood

Sampling Time

Not critical

BEI

10 ug/l

Notation

B

 

Carbon Disulphide

Determinant

2-Thiothiazolidine-4-carboxylic acid (TTCA) in urine

Sampling Time

End of shift

BEI

5 mg/g creatinine

 

Carbon Monoxide

Determinant

Carboxyhemoglobin in blood

Sampling Time

End of shift

BEI

< 8 % of hemoglobin

Notation 
 

B, C 
 

Determinant

CO in end exhaled air

Sampling Time

End of shift

BEI

< 40 ppm

Notation

B, C

 

Chlorobenzene

Determinant

Total 4-chlorocatechol in urine

Sampling Time

End of shift

BEI

150 mg/g creatinine

Notation 
 


 

Determinant

Total p-chlorophenol in urine

Sampling Time

End of shift

BEI

25 mg/g creatinine

Notation

C

 

Chromium (VI)

Determinant

Water soluble fume

Sampling Time

Increase during shift

BEI

10 ug/g creatinine

Notation 
 


 

Determinant

Total chromium in urine

Sampling Time

End of shift at end of workweek

BEI

30 ug/g creatinine

Notation

B

 

N,N-Dimethylformamide (DMF)

Determinant

N-Methylformamide in urine

Sampling Time

End of shift

BEI

40 mg/g creatinine

Notation

B

 

2-Ethoxyethanol (EGEE)

Determinant

2-Ethoxyacetic acid in urine

Sampling Time

End of shift at end of workweek

BEI

100 mg/g creatinine

 

2-Ethoxyethylacetate (EGEEA)

Determinant

2-Ethoxyacetic acid in urine

Sampling Time

End of shift at end of workweek

BEI

100 mg/g creatinine

 

Ethyl Benzene

Determinant

Mandelic acid in urine

Sampling Time

End of shift at end of workweek

BEI

1.5 g/g creatinine

Notation 
 


 

Determinant

Ethyl benzene in end exhaled air

Notation

D

 

Flourides

Determinant

Flourides in urine

Sampling Time

Prior to shift

BEI

3 mg/g creatinine

Notation 
 

B, C 
 

Sampling Time

End of shift

BEI

10 mg/g creatinine

Notation

B, C

 

Furfural

Determinant

Total furoic acid in urine

Sampling Time

End of shift

BEI

200 mg/g creatinine

Notation

B, C

 

n-Hexane

Determinant

2,5-Hexanedione in urine

Sampling Time

End of shift

BEI

5 mg/g creatinine

Notation 
 


 

Determinant

n-Hexane in end-exhaled air

Notation

D

 

Lead

Determinant

Lead in blood

Sampling Time

Not critical

BEI

50 mg/100 ml

Notation 
 


 

Determinant

Lead in urine

Sampling Time

Not critical

BEI

150 mg/g creatinine

Notation 
 


 

Determinant

Zinc protoporphyrin in blood

Sampling Time

After 1 month exposure

BEI

250 mg/100 ml erythrocytes or 100 ug/100ml blood

Notation

B

 

Mercury

Determinant

Total inorganic mercury in urine

Sampling Time

Preshift

BEI

35 mg/g creatinine

Notation 
 

B
 

Determinant

Total inorganic mercury in blood

Sampling Time

End of shift at end of workweek

BEI

15 mg/l

Notation

B

 

Methanol

Determinant

Methanol in urine

Sampling Time

End of shift

BEI

15 mg/l

Notation
 

B, C
 

Determinant

Formic acid in urine

Sampling Time

Prior to last shift of workweek

BEI

80 mg/g creatinine

Notation

B, C

 

Methemoglobin inducers

Determinant

Methemeglobin in blood

Sampling Time

During or end of shift

BEI

1.5% of hemoglobin

Notation

B, C , D

 

Methyl Chloroform

Determinant

Methyl chloroform in end exhaled air

Sampling Time

Prior to last shift of workweek

BEI 
 

40 ppm 
 

Determinant

Trichloroacetic acid in urine

Sampling Time

End of workweek

BEI

10 mg/l

Notation 
 

C, D 
 

Determinant

Total trichloroethanol in urine

Sampling Time

End of shift at end of workweek

BEI

30 mg/l

Notation 
 

C, D 
 

Determinant

Total trichloroethanol in blood

Sampling Time

End of shift at end of workweek

BEI

1 mg/l

Notation

C

 

Methyl Ethyl Ketone (MEK)

Determinant

MEK in urine

Sampling Time

End of shift

BEI

2 mg/l

 

Methyl isobutyl ketone (MIBK)

Determinant

MIBK in urine

Sampling Time

End of shift

BEI

2 mg/l

 

Nitrobenzene

Determinant

Total p-nitrophenol in urine

Sampling Time

End of shift at end of workweek

BEI

5 mg/g creatinine

Notation
 

C
 

Determinant

Methemoglobin in blood

Sampling Time

End of shift

BEI

1.5% of hemoglobin

Notation

B, C , D

 

Organophosphorus Cholinesterase Inhibitors

Determinant

Cholinesterase activity in red cells

Sampling Time

Discretionary

BEI

70% of individual's baseline

Notation

B, C , D

 

Parathion

Determinant

Total p-nitrophenol in urine

Sampling Time

End of shift

BEI

0.5 mg/g creatinine

Notation
 

C , D
 

Determinant

Cholinesterase activity in red cells

Sampling Time

Discretionary

BEI

70% of individuals baseline

Notation

B, C , D

 

Pentachlorophenol

Determinant

Total PCP in urine

Sampling Time

Prior to the last shift of workweek

BEI

2 mg/g creatinine

Notation
 

B
 

Determinant

Free PCP in plasma

Sampling Time

End of shift

BEI

5 mg/l

Notation

B

 

Perchloroethylene

Determinant

Perchloroethylene in end-exhaled air

Sampling Time

Prior to the last shift of workweek

BEI

10 ppm

Determinant

Perchloroethylene in blood

Sampling Time

Prior to the last shift of workweek

BEI

1 mg/l

Determinant

Trichloroacetic acid in urine

Sampling Time

End of workweek

BEI

7 mg/l

Notation

C , D

 

Phenol

Determinant

Total phenol in urine

Sampling Time

End of shift

BEI

250 mg/g creatinine

Notation

B, C

 

Styrene

Determinant

Mandelic acid in urine

Sampling Time

End of shift

BEI

800 mg/g creatinine

Notation
 

C
 

Sampling Time

Prior to next shift

BEI

300 mg/g creatinine

Notation
 

C
 

Determinant

Phenolglyoxylic acid in urine

Sampling Time

End of shift

BEI

240 mg/g creatinine

Notation
 

B, C
 

Sampling Time

Prior to next shift

BEI

100 mg/g creatinine

Notation
 

B, C
 

Determinant

Styrene in venous blood

Sampling Time

End of shift

BEI

0.55 mg/l

Notation
 

D
 

Sampling Time

Prior to next shift

BEI

0.02 mg/l

Notation

DD

 

Toluene

Determinant

Hippuric acid in urine

Sampling Time

End of shift Last 4 hours of shift

BEI

2.5 g/g creatinine

Notation
 

B, C
 

Determinant

Toluene in venous blood

Sampling Time

End of shift

BEI

1 mg/l

Notation
 

D
 

Determinant

o-Cresol in urine

Sampling Time

End of shift

BEI

1 mg/g creatinine

Notation
 

C
 

 

Trichloroethylene

Determinant

Trichloroacetic acid in urine

Sampling Time

End of workweek

BEI

100 mg/g creatinine

Notation
 

C
 

Determinant

Trichloroacetic acid and trichloroethanol in urine

Sampling Time

End of shift at end of workweek

BEI

300 mg/g creatinine

Notation
 

C
 

Determinant

Free trichloroethanol in blood

Sampling Time

End of shift at end of workweek

BEI

4 mg/l

Notation
 

C
 

Determinant

Trichloroethylene in end-exhaled air

Notation

D

 

Xylenes

Determinant

Methylhippuric acid in urine

Sampling Time

End of shift Last 4 hours of shift

BEI

1.5 g/g creatinine

Notation

2 mg/min