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-13- Quality of water in the lower Fruitland Formation has been found to be marginal for use'as a domestic water supply. Sampling of this aquifer in the original permit, Revision 1, and Barren Ridge areas revealed elevated levels of sodium, calcium and sulfate. Overburden and coal analyses indicate that the elevated levels of these parameters should be expected in any water encountered in this zone. A limited alluvial/colluvial aquifer probably exists in Deep Creek Canyon. Well logs indicate that the depth of this material varies from 45 feet in the northwest area of the canyon, to less then 5 feet in the northeast area. During periods of snowmelt, these materials transport water down gradient and vertically lower through the alluvial/colluvial profile. Except for material adjacent to Deep Creek, this system transports water for a very short period of time. Alluvium/colluvium adjacent to the creek probably supports some flow for a longer period of time, perhaps into mid-summer. The alluvial aquifer associated with Stollsteimer Creek receives some recharge from the alluvial/colluvial material in Deep Creek Canyon, and from Deep Creek itself. The amount of recharge contributed to the Stollsteimer alluvium from the Deep Creek system is most likely limited when considering the entire Stollsteimer alluvial aquifer system. To ensure that the quantity and quality of ground water in Deep Creek Canyon is not adversely affected, and to contribute to existing baseline data, the operator has committed to the following: Wells W-17 (D-3W) and W-18 (D4-W) will be sampled once for water quality before any disturbance occurs in the canyon. The following parameters will be analyzed in these wells, and all other ground water quality sampling in Deep Canyon unless otherwise approved by the Division. PARAMETERS pH (field) Calcium Sulfate Lead Specific conductivity (field) Magnesium Aluminum Manganese Temperature (field) Ammonia Arsenic Mercury Total dissolved solids Nitrate Cadmium Selenium Bicarbonate (as CaC03) Sodium Iron Zinc Sodium absorption ratio The results of the sampling must be submitted to the Division within 90 days of the sampling date. In addition to the above sampling, all current and future wells in Deep Creek Canyon will be sampled as follows: