• Recalculation procedure—to account for differences in resident species' sensitivity to a material.
• Water-effect ratio procedure—to account for differences in biological availability and/or toxicity of a material caused by physical and/or chemical characteristics of site water.
• Streamlined water-effect ratio for copper—for use when soluable metal is added to site water and the metal might rapidly be converted to insoluable forms with low bioavailability.
• Resident species procedures—to account for differences in residential species sensitivity and differences in the biological availability and/or toxicity of a material due to physical and/or chemical characteristics of site water.

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