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10 SURFACE WATER CONTROL AND CONTAINMENT FACILITIES <br />The permit area is located on a north -facing slope near the top of Mineral Hill. The slope is <br />generally timbered except in areas that remain open. As no potential acid generating materials, <br />acid water, or designated chemicals are present, no special surface water control, or <br />containment facilities are necessary for this site. <br />Since, per Section 7, any potential acid generating materials (none known to exist) would be <br />retained in the mine and away from the weather and precipitation, no outside facilities are <br />required or necessary to contain them. <br />The map (Stormwater Runoff Map with flow directions) is included showing the surface flow <br />directions within and adjacent to the permitted area. As no potential acid generating rock has <br />been found within the permit area, nor is any anticipated to be found, removed materials can <br />be placed on the surface with no special diversions or containment described in the Rule. In <br />the event any rock having a demonstrated acid generating potential should be discovered <br />sometime in the future, it will be stored inside the mine, or out of the weather, to avoid <br />precipitation contact. Alternatively in the future, if materials are found that by standard <br />laboratory testing are shown to be potentially acid generating, then additional testing would be <br />performed to allow better prediction of acid generating potential and the timeframes in which <br />acid generation might occur. This information would then be used to design and implement <br />any containment systems which might be necessary. <br />Although not related to DRMS regulation, fuel storage tanks will likely be located within the <br />permit area. They will have secondary containment to protect surface waters that will be equal <br />to their total volume plus additional storage for precipitation events; generally calculated at <br />one hundred and ten percent of tank volume. As the quantity of fuel stored on site is <br />anticipated to be so small, this containment is not required by regulation, but will be installed <br />and implemented by the operator as part of good workmanlike practice. <br />11 SURFACE WATER QUALITY STANDARDS <br />The site, as described previously, is located high on the north slope of Mineral Hill, and there <br />are no perennial streams. The closest stream that can be considered perennial would be the <br />lower reaches of Barnard Gulch, a distance of nearly 6 stream -miles away. Any testing of the <br />waters at that point would amount to trespass on someone else's private property, and no <br />reasonable scenario could be developed that would produce any measurable impacts to waters <br />located that far downstream of the permit area. The standards for that stream are those <br />7 <br />