D. J. Mcgirr

• Copper, cadmium, aluminum, strontium and mercury
• Interlaboratory quality control study no. 10
• Interlaboratory quality control study no. 4
• Interlaboratory quality control study no. 6
• Interlaboratory quality control study no. 7
• Interlaboratory quality control study no. 9
• Major cations and anions
• Specific conductance, pH, colour and residue
• Turbidity and filterable and nonfilterable residue