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13 September 2012 <br /> AGE-NC Project No.99-0682 <br /> Page 7 of 17 <br /> • Depth to groundwater measurements ranged between 24.61 feet(MW-1 A)btoc and <br /> 26.16 feet (MW-7) btoc; <br /> • pH ranged from 5.90 (MW-1 A) to 6.80 (MW-6 and MW-7); <br /> • SC ranged from 689 pS/cm (MW-1A) to 1,434 pS/cm (MW-6); <br /> • Temperature ranged from 21.10 °C (MW-6) to 26..10 °C (MW-1 A); <br /> • DO ranged from 0.96 mg/I (MW-7)to 1.47 mg/I (MW-8) and from 10.9 %to 17.5%; <br /> • ORP ranged from -49.6 (MW-6) to 53.1 mV (MW-1A); <br /> • Salinity ranged from 0.32 (MW-1A) to 0.72 (MW-6); and <br /> • TDS ranged from 436 mg/I (MW-1 A) to 883 mg/I (MW-6). <br /> 4.1.5. Post-ISCO Monitoring Event No. 3 Results <br /> On 12 July 2012,field parameters were collected from wells MW-1A, MW-2, MW-6, MW-7, <br /> MW-8, and MW-10 as part of post-ISCO injection groundwater monitoring. The following <br /> is a summary of the results: <br /> • Depth to groundwater measurements ranged between 24.75 feet(MW-1A)btoc and <br /> 26.46 feet (MW-7) btoc; <br /> • pH ranged from 6.07 (MW-1A) to 6.82 (MW-7); <br /> • SC ranged from 632 pS/cm (MW-1A) to 1,370 pS/cm (MW-6); <br /> • Temperature ranged from 21.70 °C (MW-6) to 26.60 °C (MW-1A); <br /> • DO ranged from 0.79 mg/I (MW-7) to 1.66 mg/I (MW-2) and from 9.0% to 19.7%; <br /> • ORP ranged from -50.8 (MW-6) to 27.8 mV (MW-1A); <br /> • Salinity ranged from 0.36 (MW-1 A) to 0.73 (MW-6 and MW-7); and <br /> • TDS ranged from 481 mg/I (MW-1 A) to 937 mg/I (MW-6). <br /> 4.1.6. Post-ISCO Monitoring Event No. 4 Results <br /> On 19 July 2012 field parameters were collected from wells MW-1A, MW-2, MW-6, and <br /> MW-8 as part of post-ISCO injection groundwater monitoring (wells MW-7 and MW-10 <br /> Advanced GeoEn ironmental,Inc. <br />