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1 Draft: March 31, 1999 <br />Page 9 <br />2.3 Parachute Site <br />' American Soda wil l use one monitoring well to monitor groundwater quality and water levels <br />at the Pazachute processing site. The monitoring well will be completed at the base of the Alluvial <br />Aquifer to monitor for potential leakage from this pond. The monitoring well will be situated <br />down-gradient of the proposed pond, between the pond and Parachute Creek. The monitoring <br />' protocol for the Pazachute site is identical to the Yankee Gulch Lease site. <br />3.0 GROUNDWATER MONITORING <br />' Groundwater levels will be measured in all available monitoring wells. Groundwater <br />samples will be collected for analysis. The sampling frequencies, sampling methods, and <br />' groundwater pazameters aze presented in this section. The sampling frequencies for the baseline <br />monitoring period and commercial operations are also detailed in this section. <br />' The groundwater monitoring wells will be monitored on a once per month basis during the <br />baseline monitoring period. During these monitoring events, the elevation ofthe groundwater level <br />' will be measured and the well will be sampled for Water Quality list 1 (WQ1) pazameters listed in <br />Table 2. Water level measurements will be taken in accordance with procedures detailed in <br />' Appendix B. Once per quarter, the water quality parameters list will include the expanded set of <br />parameters listed in Water Quality list 2 (WQ2), included as Table 3. The water quality samples will <br />' be collected in accordance with the procedures detailed in Appendix C. <br />3.1 Water Level Mouitoring <br />' Water levels will be measured monthly for all monitoring well completions except those <br />completed at the Dissolution Surface. Water levels at monitoring wells completed at the Dissolution <br />' Surface will be monitored by automated data recording equipment and evaluated monthly. The <br />monitoring schedule is identical for the baseline data collection period and during commercial <br />' mining operations. Water level monitoring will be conducted in accordance with procedures detailed <br />in Appendix B. <br />1 <br /> <br />1 <br />Agapito Associates, [nc. <br />