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13 September 2012 <br /> AGE-NC Project No.99-0682 <br /> Page 8 of 17 <br /> were inaccessible). The following is a summary of the results: <br /> • Depth to groundwater measurements ranged between 24.90 feet(MW-1A)btoc and <br /> 26.00 feet (MW-7) btoc; <br /> • pH ranged from 5.55 (MW-1 A) to 6.62 (MW-8); <br /> • SC ranged from 830 pS/cm (MW-1A)to 1,267 pS/cm (MW-6); <br /> • Temperature ranged from 21.11 °C (MW-6) to 24.65 °C (MW-1A); <br /> • DO ranged from 0.91 mg/I (MW-8)to 2.02 mg/I (MW-6) and from 10.8%to 22.8%; <br /> • ORP ranged from -91.2 (MW-1 A) to 24.8 mV (MW-7); <br /> • Salinity ranged from 0.41 (MW-1A) to 0.69 (MW-6); and <br /> • TDS ranged from 542 mg/I (MW-1A) to 889 mg/I (MW-6). <br /> 4.2. ANALYTICAL RESULTS OF GROUNDWATER SAMPLES <br /> On 24 April 2012, baseline groundwater samples were collected from wells MW-1A, MW-6, <br /> MW-7, MW-8, and MW-10 during a semi-annual groundwater sampling event. On 07 and <br /> 21 June 2012, progress-ISCO injection groundwater samples were collected following <br /> injection event 2 and injection event 4 from wells MW-1A, MW-6, MW-7 and MW-8. <br /> Additionally, four post-ISCO injection events were performed on 28 June, 05 June, 12 July <br /> and 19 July 2012 utilizing wells MW-1 A, MW-2, MW-6, MW-7, MW-8 and MW-10; during <br /> the 05 July 2012 post-ISCO monitoring event, well MW-2 was not sampled and during the <br /> 19 July 2012 monitoring event well MW-7 was not sampled due to a parked vehicle <br /> restricting access to the wells. Analytical results of groundwater samples are summarized <br /> in Tables 3 (VOC's), 4 (metals), and 5 (anions). <br /> Laboratory reports, (CTEL Project Nos. CT214-1206030, -1206133, -1206179, - <br /> 1207018,1207058 and-1207097),quality assurance/quality control(QA/QC)and chain-of- <br /> custody forms are included in Appendix D. Electronic deliverable format (EDF)files were <br /> uploaded to the State GeoTracker database. <br /> 4.2.1. Baseline-ISCO: Analytical Results - 24 April 2012 <br /> On 24 April 2012, groundwater samples were collected from wells MW-1 A, MW-6, MW-7, <br /> MW-8, and MW-10; metals and anions were not analyzed from well MW-10. The following <br /> Advanced GeoEnvironmental,Inc. <br />