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_17_ An alluvial ground water aquifer has been identified along East Salt Creek. Monitoring wells established in the alluvium indicate that alluvial water levels fluctuate seasonally in response to flow in East Salt Creek, which in turn primarily responds to flow in tributary ephemeral streams. Data collected by the applicant from the Salt Creek alluvial aquifer thus far indicate a sodium- sulfate type water, similar to the characteristics of the surface water in the system, as would be expected. No significantly adverse affects on ground water resources are anticipated for this operation. Salt Creek Mining Company intends to monitor this aquifer upstream of McCZane Canyon and downstream of Munger Canyon to identify any effects from mining. Salt Creek Mining Company has committed to continue monitoring wells GW-3 and GW-4 in the Salt Creek alluvium quarterly. At these times, the water level in the wells will be measured and samples will be taken for analyses of pH, temperature and specific conductance. The results of this monitoring will be submitted to the regulatory authority within 30 days of data collection and analysis. Narrow bands of alluvial-colluvial material extend about one mile up Munger Canyon from the confluence with East Salt Creek. Monitoring well GW-4, which is 40 feet deep and is located at the lower part of Munger Canyon, was dry in April, 1981 during the period of the year of snowmelt and highest precipitation. Also, test pits TP-1, TP-2 and TP-3, dug to a depth of 10 feet in the Munger Creek alluvium, had no traces of mottling and a very slight increase in moisture with depth (see Tables 4.1-1 through 4.1-3). This, along with the type of vegetation present on the alluvium, suggests the absence of natural subirrigation in the Munger Creek alluvium. The applicant proposes a monitoring hole GW-6 to be installed in the Munger Creek alluvium downslope of the waste rock pile. The Division requires the following stipulation to the permit to insure that baseline data is obtained prior to the disposal of waste rock in the proposed pile: Stipulation No. 4 SALT CREEK MINING COMPANY SHALL INSTALL AND MONITOR THE PROPOSED MONITORING WELL GW-6 ONE YEAR PRIOR TO THE CONSTRUCTION OF THE HUNGER CANYON MINE WASTE ROCK PILE. WATER QUALITY SAMPLES AND WATER LEVELS SHALL BE TAKEN QUARTERLY. MONITORING SHALL BE SUB- MITTED TO THE REGULATORY AUTHORITY QUARTERLY. No wells or springs have been identified within three miles of the mine. Thus, the Munger Canyon mining operation will not effect the quantity or quality of any ground water which is put to beneficial use off-site. With the acceptance of the above stipulation, the operation is in compliance with the requirerrents of this section.