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2. Results for Second Semiannual Period 2014 <br /> i <br /> This section presents the groundwater monitoring results for the second semiannual <br /> period 2014, the status of remediation and other completed activities for the second <br /> semiannual period 2014, and planned activities for the next semiannual monitoring period. <br /> ' 2.1 Groundwater Monitoring <br /> The following groundwater monitoring activities were performed in the second semiannual <br /> period 2014 (April through September 2014), in accordance with MRP No. R5-2007-0831. <br /> • Depth to groundwater was measured on September 10, 2014, in 13 of the 15 shallow (less <br /> than 25 feet below ground surface [bgs]) onsite groundwater monitoring wells and <br /> 1 deeper (greater than 35 feet bgs) onsite groundwater monitoring well. Depth to <br /> groundwater from N-16 was measured on the following day, September 11,2014, <br /> 1 because a wasp nest underneath the cover for the protective monument prevented <br /> access on the initial day. A measurement was not obtained from M-1 because it was not <br /> accessible. <br /> • Groundwater samples were collected on September 10, 2014, from 8 of the 13 shallow <br /> wells scheduled to be sampled and the 1 deeper well scheduled to be sampled. The <br /> sample from N-16 was obtained on September 11, 2014. A sample could not be obtained <br /> from M-1 because it was not accessible. Samples could not be obtained from N-8, M-10, <br /> and M-8 because the groundwater elevation was very low, and there was insufficient <br /> water to collect a sample. <br /> • Groundwater and quality assurance samples were analyzed by a state-certified <br /> laboratory. <br /> ' 2.1.1 Methods <br /> The following wells were gauged and sampled: <br /> Order Well Gauge Method <br /> 1 Upgradientwells: M-1*, M-2**, M-3** Single-Phase Probe <br /> ' 2 Sentinel wells: M-8***, N-18, N-19, N-20 Single-Phase Probe <br /> 3 Deep well: N-24 Single-Phase Probe <br /> 4 Plume fringe wells: M-10***, N-8***, 0-1 Single-Phase Probe <br /> 5 Plume wells: N-7, N-15, N-16, N-17, RW-1 Single-Phase Probe <br /> *Well M-1 was not gauged or sampled because it was not accessible. <br /> **Wells M-2 and M-3 were gauged only and not sampled, as scheduled. <br /> ***Wells M-8, M-10, and N-8 were not sampled because of insufficient water due to low water levels. <br /> ES101214202053SCO 2-1 <br />