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Environmental Protection Plan, Schwartzwalder Mine <br />9-49 <br />• sheeting, and funneled into a one-gallon sample bottle. It took 20 - 30 minutes to collect one gallon, <br />which equates to a flow rate of 0.03 to 0.05 gpm. <br />• ILLRS - The flow seeped out from boards in the Illinois raise on the Steve Level. The water from the <br />largest drip was collected on plastic sheeting, and it took 10 - 15 minutes to collect one gallon. This <br />equates to a flow rate of 0.067 to 0.1 gpm for the largest drip. The estimated flow rate for all of the <br />drips at this location is 0.15 gpm. <br />• CO - The sample was collected from the Colorado drift bulkhead on the Steve Level. The flow was <br />approximately four times the volume seen in the WASH and ILLRS samples, combined. The flow rate <br />was estimated at 0.8 gpm. <br />• 146 - This sample was a composite sample from pools on the Steve Level. It represents the composite <br />water quality from a number of random drips that could not be sampled individually. The estimated <br />flow rate for all these random drips is 0.5 gpm. <br />• MINN - Water entering the Minnesota Level near the glory hole was sampled on May 15, 1999. The <br />flow rate was not measured. <br />The combined inflow rate of 1.5 gpm to the upper workings listed in Table 9-8 excludes unmeasured flow <br />near the glory hole and represents a snapshot in time of seasonal inflow in response to spring runoff. The <br />average annual inflow to the mine workings above the Steve Level is estimated to be about 1.4 gpm <br />(Section 8(b)(iii).3.2). <br />Water seeping into the upper levels of the mine is impacted by acid rock drainage and is a poor quality <br />magnesium-calcium-sulfate water with acidic to moderately alkaline pH (2.7 to 8.2), and high <br />. concentrations of total dissolved solids (1,230 to 11,000 mg/L) mostly in the form of sulfate (790 to 7,200 <br />mg/L). Water samples from the upper workings were also analyzed for a limited suite of metals including <br />copper (0.04 to 19 mg/L), manganese (<0.01 to 27 mg/L), and uranium (0.0338 to 150 mg/L). Water <br />quality analyses for samples collected from the Minnesota and Steve Levels are plotted in Figure 9-12 and <br />summarized in Table 9-9. <br />• <br />4109C.090807 Whetstone Associates