Laserfiche WebLink
steams. These parameters will be monitored on a monthly basis during commercial mining <br />operations. <br />Potential leakage from a solution cavity will be monitored by compazative evaluation of injection <br />and production fluid (and/or mass) flow rates and nitrogen consumption, which will be <br />automatically reported to a master control system. The nitrogen gas cap will be monitored daily <br />by measuring nitrogen consumption and production fluid pressure. <br />5.2 Solution and Cooling Ponds <br />The solution and cooling ponds associated with the test mine facility are protected against <br />leakage by a double geosynthetic liner and geonet leak detection and collection system (LDCS). <br />During commercial production operations, this system will be monitored twice per shift. The <br />freeboazd of the dams will be measured once per day. During the temporary suspension period, <br />the LDCS will be checked quarterly in conjunction with water level measurements and water <br />quality samples collected from the alluvial monitoring wells 21-2, 28-1, and 21-5. <br />6.0 Quality Assurance/Quality Control (QA/QC) <br />A State ofColorado-certified laboratory will be used for all ground water and surface water <br />quality analyses for all designated sites and frequencies specified in this plan. Quality <br />Assurance/Quality Control samples will be collected to verify field sampling techniques and <br />laboratory procedures. American Soda field sampling methods and certified laboratory analysis <br />were verified by the USGS in the first yeaz of commercial operations. Samples were collected <br />simultaneously by USGS field personnel and sent to the USGS analytical laboratory to perform <br />third-part validation of water quality data. Comparison of data results and QA/QC between the <br />USGS and American Soda indicate that American Soda's sampling and laboratory analytical <br />program aze very compazable to the programs coordinated and managed by the USGS. No <br />deficiencies were identified. <br />6.1 Ground Water Sampling Methods <br />Ground water sampling will be performed in accordance with the standard operating procedures <br />(SOP) developed for the site. The SOP for ground water sampling is included as Appendix C <br />and provides detailed instructions on the following topics: <br />Equipment <br />Instrument Calibration <br />Well purging <br />Sample collection <br />Sample filtration <br />Field QA/QC procedures <br />The wells are equipped with dedicated sampling equipment. In the event dedicated equipment is <br />inoperable, clean, decontaminated equipment will be used for all sampling activities. <br />Decontamination will be performed in accordance with the procedures given in Appendix D - <br />Standazd Operating Procedure for Equipment Decontamination. <br />Draft Modification No. 9 UIC Area Permit No. CO30858-00000 Page 34 of 44 <br />