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COLORADO LEGACY LAND <br /> TABLE 2A.GROUNDWATER SAMPLE FIELD PARAMETERS <br /> Field Parameters <br /> Location ID/ Static Depth to Water pH Temperature Conductivity ORP Dissolved Oxygen Notes/Location Description <br /> Sample ID Sample Date ft btoc (unitless) (°C) S cm mV m /L <br /> MW-00 8/9/2019 8.2 6.87 12.1 334.6 117.7 1.19 Alluvial well. Above waste dumps,upstream of site. <br /> MW-0 8/9/2019 13.2 6.73 10.9 510 44.4 2.68 Alluvial well.Toe of south waste rock pile. <br /> MW-1 Not sampled,Unable to access due to __ __ __ __ __ __ Alluvial well.Next to former concrete containment. <br /> construction. <br /> MW-2 Not Sampled-Dry Dry __ __ __ Alluvial well.Below retention ponds near creek Usually dry. <br /> MW-3A Not Sampled-Dry Dry -- __ __ __ __ Alluvial well. Near former haul road.Usually dry. <br /> MW-4 N/A N/A N/A N/A N/A N/A N/A Removed in 2008. <br /> MW-5 N/A N/A N/A N/A N/A N/A N/A Removed in 2008. <br /> MW-6 Not Sampled.Insufficient Water Volume 13.6 -- __ __ Alluvial well. Near former Sump#2. <br /> MW-7 Not Sampled,Dry Dry -- -- __ __ __ Alluvial well. Near Sump#1 <br /> MW-8 N/A N/A N/A N/A N/A N/A N/A Not sampled,replaced with well MW-12. <br /> MW-9 N/A N/A N/A N/A N/A N/A N/A Not sampled,tied in with sumps. <br /> MW-10 N/A N/A N/A N/A N/A N/A N/A Not sampled,bentonite in screened interval. Replaced with MW-13.Background well. <br /> MW-11 N/A N/A N/A N/A N/A N/A N/A Not sampled,bentonite in screened interval. Replaced with MW-14.Background well. <br /> MW-12 Not Sampled,Dry Dry -- -- __ __ __ Below Sump#1.Alluvial well. <br /> MW-13 9/20/2019 Transducer malfunction' 7.00 10.0 335.5 67.5 1.38 Nitrogen purge.Replaced MW-10.Previous Sample ID=L1.Background well. <br /> MW-14 9/20/2019 52.8 7.51 10.3 5.3 -143.9 0.48 Nitrogen purge.Replaced MW-11. Previous Sample ID=L2.Background well. <br /> MW-15 Not Sampled,Pump malfunctionz Transducer malfunction 1 -- -- __ __ __ Nitrogen purge.Previous Sample ID=L3.Bedrock well. <br /> Not sampled,no pump in well. Monitor water level only. Previous Sample ID=L4.Bedrock <br /> MW-16 N/A Transducer malfunction' N/A N/A N/A N/A N/A well. <br /> MW-17 Not Sampled,Dry Dry. -- __ __ __ -_ Nitrogen purge.Previous Sample ID=L5. <br /> Previous Sample ID=L6.Bedrock well,installation targeted Illinois fault zone in alluvial <br /> MW-18 9/25/2019. 159.7 7.53 14.8 749 -208.9 0.30 valley. <br /> MW-19 8/9/2019 17.94 6.77 12.3 672 184.1 5.78 Toe of south waste rock pile.Previous Sample ID=L7. <br /> MW-20 Not Sampled.Insufficient Water Volume 51.0 -- -- __ __ __ Usually dry.Top of south waste rock pile. <br /> Sample collected from spigot inside water treatment plant. This is the water treatment plant <br /> Raw Feed 8/6/2019 N/A 7.33 18.6 2,894 -110.3 1.77 intake from the mine pool.Previous Sample ID=Mine Refill. <br /> Sample collected from spigot inside water treatment plant. This is the combined,collected <br /> Sumps 8/6/2019 N/A 7.36 16.6 1,060 62.7 6.02 sump water. <br /> Notes: <br /> 'No readings were collected from installed transducer.Reinstalled Q4 2019 and MW=Monitoring Well <br /> Q1 2020 ORP=Oxidization Reduction Potential <br /> 2Pump unable to be installed in Q3.Reinstalled Q4 2019 <br /> µS/cm=microSemiens per centimeter <br /> °C=degrees Celsius <br /> ft btoc=feet below top of casing <br /> ID=Identifier <br /> mg/L=milligrams per liter <br /> mV=millivolts <br /> PAGE 7OF12 <br />