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Table III Water chemistry of samples collected within the study site at the Richmond Mine 5-way area (at the 5-way, A, B, C weirs, and at the A-slump and red pool in 2001). Concentrations are reported in millimolar units, nd = not determined.

From: Acid mine drainage biogeochemistry at Iron Mountain, California

Sample name Date A1 As Ca Cd K Mg Mn Na Pb SiO2
99IM25-way May-99 54 1.6 5.9 0.14 nd 32 0.31 7.8 0.017 nd
OOIM15-way June-00 29 0.9 2.9 0.07 nd 17 0.15 4.5 0.009 nd
01IM15-way January-01 nd 0.316 nd 0.067 nd nd nd 0.596 nd 0.2
02IM15-way March-02 64 2.0 8.1 0.11 nd 32 0.31 11.8 0.026 nd
99IM2A1 May-99 61 1.2 6.1 0.10 nd 37 0.33 6.6 0.015 nd
OOIM1A1 June-00 47 0.4 3.3 0.05 3.3 26 0.24 1.5 0.047 1.3
01IM1A1 January-01 nd 0.3 nd 0.04 nd nd nd 0.5 0.036 nd
02IM1A1 March-02 63 1.5 6.8 0.10 nd 31 0.31 11.0 0.018 nd
99IM2B1 May-99 57 1.7 6.2 0.15 nd 30 0.31 9.2 0.019 nd
00IM1B1 June-00 34 0.9 2.9 0.08 nd 17 0.16 5.4 0.011 nd
01IM1B1 January-01 nd 0.4 nd 0.09 nd nd nd 0.6 0.018 nd
02IM1B1 March-02 nd nd nd nd nd nd nd nd nd nd
99IM2C1 May-99 51 0.8 3.8 0.13 3.4 29 0.29 2.5 0.046 1.5
OOIM1C1 June-00 41 0.6 3.2 0.10 2.7 23 0.23 1.9 0.039 1.3
01IM1C1 January-01 nd 0.4 nd 0.10 nd nd nd 0.5 0.039 nd
02IM1C1 March-02 65 1.8 8.1 0.10 nd 33 0.29 15.6 0.02 nd
02IMM B-back March-02 35 nd 7.3 0.11 nd 17 0.18 12.1 0.023 nd
02IM1 C-back March-02 67 nd 7.8 0.07 nd 32 0.29 16.0 0.02 nd
00IM1 A-slump June-00 3 0.2 1.9 0.00 nd 2 nd 0.2 0.015 1.0
01IM1 A red pool January-01 nd 0.0 nd 0.01 nd nd nd 0.2 0.006 nd
02IMM A-back March-02 80 2.5 10.2 0.13 nd 43 0.38 13.6 nd nd