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Natural Soda, Inc. Groundwater February 2001 Surface and Groundwater Monitoring Report Natural Soda, Inc., commenced sampling activities to establish water quality information for its experimental pilot plant nahcolite project pursuant to the approved surface and groundwater monitoring plan dated November 23, 1999. This activity included drilling and completion of six groundwater monitoring wells between January 18, 1999 and January 31, 2000. One well, MWD-1, is located in the pillar among the production wells on Pad 1. MWD-1 monitors the interval just above the Dissolution Surface. Pad 2 is immediately downgradient of the production wells. Wells drilled and completed on Pad 2 are identified as follows: MWU-2 in the Uinta Formation; MWA-2 at the A-Groove; MWB-2 at the B-Groove; and MWD-2 just above the Dissolution Surface. Baseline water data are collected from monitoring wells MWU-2, MWA-2, and MWB-2 and MWD-2 located on Pad 2 and MWD-1 located on Pad 1. Alluvial groundwater is sampled in wells AM-1 and AM-2 located in the Yellow Creek drainage. Water monitoring locations aze presented in Figure 1. MWA-2 and AM-2 were purged by air-lifting significant quantities of groundwater out of the wellbore using compressed air and''/z-inch-diameter PVC piping, and'/s-inch diameter stainless- steel tubing, respectively. AM-2 was sampled using compressed air. MWA-2 was sampled using the nitrogen purge lift system. MWU-2 and MWB-2 were both purged and sampled using the nitrogen lift system. Monoflex stainless steel samplers were installed near the bottom of the borehole in MWD-1 and MWD-2 to sample these wells by the micropurge system. Since September 2000, a nitrogen micropurge system has been used for MWD-1 and MWD-2. Field pazameters tested at the time of sample recovery include the following: depth to water level, temperature, conductivity, pH, and total dissolved solids. The date and time of the sampling were noted, along with field site conditions and any other unique features of the sampling events. Daub & Associates, Inc., an independent third-party contractor, conducted the sampling activities for Natural Soda, Inc. February field measurements for these groundwater monitoring wells aze presented in Table 1. The analytical laboratory results are presented in Tables 2 through 6. The complete analytical laboratory data reports, which include the Long List constituents for each well as specified in the approved surface and groundwater monitoring plan dated November 23, 1999, aze presented in Appendix A. Surface Water Streams Three surface-water stream locations were sampled by Daub & Associates, Inc., to establish water quality information -two upgradient and one downgradient of the project site. The upgradient stream locations include the Coaal Gulch drainage neaz the inactive U.S. Geological Survey (USGS) monitoring station number 09306244 and the Stake Springs Draw drainage above the confluence with Yellow Creek near the inactive USGS monitoring station number 09306230. The Corral Gulch location is identified as SW-1; the Stake Springs location is identified as SW-2 (see Figure 1). Daub & Associates, Inc.