114 a PQL of 0.05 g/m3. The reporting 'limit' for mercury and chromium concentrations shall be reviewed annually by the Consent Holder and shall be adjusted in line with improvements in analytical technology. (7) Discharge limits for metals are for ‘acid-soluble’ concentration, determined on unfiltered samples. Table 2: Calculation of Compliance Levels for Hardness Related Criteria Maximum Allowable Concentration = (1+ ×( − ) Where: Y = (exp {m [ln H’] + b}) x 10-3 x C, and H’ = (Z x WTP Discharge Hardness) + 14 (1+Z) Z=0.15 for Operating Regime A Z=0.2 for Operating Regime B Z=0.1 for Operating Regime C Z=0.4 for Operating Regime D Z=0.6 for Operating Regime E using the following constants: Parameter Compliance Maximum(1) X(2) C m B m b Copper 0.8545(3) -1.465(3) 0.9422 -1.464 0.001 0.85 or 1.10(4) Nickel n/a n/a 0.846 1.1645 0.006 1.0 Zinc n/a n/a 0.8473 0.7614 0.0047 1.0 Silver 1.51(5) -9.72(5) 1.72 -6.52 0.0000 5 45.2 or 1.0(6) Cadmium n/a n/a 0.7852 -3.49 0.0001 1.0 Lead n/a n/a 1.273 -4.705 0.0002 1.0 Table 2 Notes: (1) From USEPA acute criteria (copper and silver) or chronic criteria (nickel, zinc, cadmium and lead) for aquatic biota. (2) Mean receiving water quality as measured at Station OH3. (3) From USEPA chronic criteria for aquatic biota. (4) Constant to convert calculation for copper = 0.85 (Compliance value) or = 1.0 (Maximum value). (5) From site specific criteria, calculated using USEPA (1985) methodology. (6) Constant to convert calculation for silver = 103/22.1 (Compliance value) or = 1.0 (Maximum value).
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