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13 September 2012 <br /> AGE-NC Project No.99-0682 <br /> Page 5 of 17 <br /> 4.1. FIELD PARAMETERS <br /> Baseline field parameters were collected on 24 April 2012;progress-ISCO field parameters <br /> were collected between 29 May and 21 June 2012; and post-ISCO injection field <br /> parameters were collected on 28 June, and on 05, 12 and 19 July 2012. Field parameters <br /> were collected in accordance with the draft MRP and are summarized in Table 1; depth to <br /> groundwater measurements are summarized in Table 2. <br /> 4.1.1. Baseline Results <br /> On 24 April 2012, field parameters were collected from wells MW-1A, MW-6, MW-7 and <br /> MW-8 prior to initiation of the ISCO pilot test. The following is a summary of the results: <br /> • Depth to groundwater measurements ranged between 24.91 (MW-1A) feet below <br /> the top of the well casing (btoc) and 26.49 feet btoc (MW-7); <br /> • pH ranged from 6.74 (MW-1A and MW-6) to 7.03 (MW-8); <br /> • EC ranged from 823 microsiemens per centimeter(NS/cm; MW-1 A)to 1,134 SIS/cm <br /> (MW-8); <br /> • Temperature ranged from 21.6 (MW-6, MW-7 and MW-8)to 22.9 degrees Celsius <br /> (°C; MW-1A); <br /> • DO ranged from 1.23 (MW-1 A) to 1.52 milligrams per liter (mg/I; MW-6) and from <br /> 14.0 to 16.9 percent (%), respectively; <br /> • ORP ranged from -243.2 millivolts (mV; MW-8) to 34.8 mV (MW-7); <br /> • Salinity ranged from 0.56 (MW-6) to 0.65 (MW-8); and <br /> • TDS ranged from 721 milligrams per liter (mg/l; MW-1A) to 849 mg/I (MW-8). <br /> 4.1.2. Progress-ISCO Results <br /> Between 29 May and 21 June 2012, field parameters were collected from wells MW-1A, <br /> MW-6, MW-7 and MW-8 on ten selected days during the ISCO pilot test. The following is <br /> a summary of the results: <br /> • Depth to groundwater measurements ranged between 24.38(MW-1 A)feet btoc and <br /> 26.75 feet btoc (MW-8); <br /> Advanced GeoEnvironmental,Inc. <br />