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(Note: For comparison purposes, the 10 yeaz, 24 hour precipitation event at Oxbow is 2.0 inches.) All pond structures and outlet works were otherwise operating as designed prior to the inflows. On 10/17/2006 bottled samples were obtained of the dischazges with the lab results summarized by the following Table #2. Table #2 -October 17, 2006 Dischazge Summary ANALYTE RESULTS t. 012 t 016 EFFLUENT LIMIT Conductivi umhos/cm 710 2300 NA Iron, Total m 2.0 3.5 3.0/6.0 H 8.20 7.86 6.5-9.0 Solids, Total Dissolved (mg/1 460 1200 Re ort Solids, Settleable mUl/hr) <0.1 <0.1 0.5 Solids, Total Sus ended m ) 150 110 35/70 Flow ( m) 100 100 Re ort Oil and Grease m 1) No sheen No sheen 10 The analysis of the data indicate that the pH, SS and oil and grease effluent limits were in compliance with effluent limitations. OMLLC requests relief from the primary effluent limitations for TSS and total iron limitations because of dischazges caused by precipitation less than or equal to the 10-yeaz, 24-hour precipitation event. Both outfalls dischazge to Elk Creek, an ephemeral stream. Elk Creek flows south to the North Fork of the Gunnison River. For comparison purposes, two monitoring sites on the North Fork receiving stream were also sampled. NF-1 is up located upstream and NF-3 is located downstream of the North Fork/ Elk Creek confluence. Similaz to OMLLC minesite, the watersheds of the North fork were also receiving heavy precipitation. The result was elevated suspended solids in this receiving stream. A comparison of the quality of the dischazges versus the receiving stream can be useful to determine impacts on the hydrologic balance. The North fork analytical data is summarized by Table #3. ANALYTE Table #3 -October 17, 2006 North Fork Summary RESULTS NF-1 NF-3 Conductivi (umhos/cm) 170 150 Iron, Total m l 12 12 H 6.57 8.01 Solids, Total Dissolved m 1) 170 200 Solids, Settleable ml/1/hr 0.1 0.1 Solids, Total Sus ended m I) 330 340 • Page 3