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:,. -':, Dr. Posey is mistaken. None of the humidity cell tests have been halted -they are continuing as the OMLR was clearly informed during the meeting. APPENDIX 10 Dr. Posey continues "Therefore, it should be obvious that the waste rock will produce acid if not protected from weathering and release of solution. Even for most of the humidity cell tests that were curtailed after only 4 to 12 weeks, acid production is high (pH low). Given these data, it would be impossible to honestly and knowingly conclude that the surface and groundwaters can be adequately protected simply with a monitoring program, as CC&V [has] proposed." CC&V's examination of the humidity cell data indicates to it that water quality from the waste rock will approximate water quality from the diatreme itself, as that water quality is represented by surface-water samples collected at AG-1 and ground-water samples collected in Arequa Gulch as reported in Applications for Amendments 5 and 6. The surface water data were reported earlier in this response. The ground-water data are reiterated in the following tabulation (Table 5). TABLE 5. WATER QUALfI'Y ANALYSES OF GROUND WATER B4 AREQUA GULCH (mg/1) (Acculabs upon June 16, 1993) Water Quality Parameter (local ncovenble) Drill Hole CR-790 Volcanic Roclu near Granite cowct Drill Hole CA-787 Gnoitie Racks dirun from Volcanic coouat Drill Hole CR-794 Granitic Roclu trar Volcanic cowct Drill Hole CR-784 Volcanic Roelu diwnt fmm Granite wouct Aluminum 230 170 285 120 Barium 5.5 5.4 13 4.8 Cadmium 0.37 0.013 0.16 0.011 Chromium 0.017 0.068 0.041 0.065 Copper 0.11 0.20 0.50 0.64 Lon 96 92 120 320 Mengenex 26 6.8 9.4 8.5 Molybdenum 0.39 I.5 1.6 0.37 Nickel 0.08 0.04 0.05 0.08 Zirc 6.6 2.2 3.0 1.7 Arsenic 0.088 0.088 0.072 0.30 Mercury 0.0001 <O.000I <0.0001 <O.000I Lead 1.3 0.71 1.0 1.4 Selenium <0.05 <0.05 <0.06 O.OI4 Silver 0.0035 0.0032 0.0061 0.017 20