52. Regulation 5 (4) of the HCS Regulations imposes a duty on the employer to monitor the exposure of employees to substances hazardous to health.
53. Details of routine sampling strategies for individual substances are outside the scope of this document. However, advice is available in EH 42, which provides practical guidance on monitoring substances hazardous to health in air.
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 ug/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
D
Determinant
End exhaled
BEI
0.12 ppm
Cadmium
Determinant
Cadmium in urine
Sampling Time
Not critical
BEI
10 ug/g creatinine
Notation
B
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
