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1 <br /> 16 2 0 GROUNDWATER MONITORING, SAMPLING AND ANALYSIS <br /> On November 26 2002 to comply p y with quarterly groundwater monitoring requirements and to <br /> evaluate the stability of the plume of impacted groundwater, Ramage Environmental monitored <br /> and sampled 8 of the 11 monitoring wells, and collected a groundwater sample from the nearby <br /> cemetery irrigation well #2 Monitoring well MW-1 was not monitored or sampled due to damage <br /> at the wellhead Monitoring wells MW-4 and VW-1 were covered with dirt and not found <br /> 2.1 Groundwater Monitoring <br /> Depth-to-groundwater measurements were taken in all eight of the accessible groundwater <br /> monitoring wells to evaluate groundwater flow and gradient characteristics <br /> In the eight wells monitored, the depth-to-groundwater beneath the site ranged from 45 94 feet <br /> below ground surface (bgs) in MW-2 to 49 40 feet bgs in MW-7 MW-7 is the only well <br /> completed above-grade and protected with a monument casing The groundwater elevation <br /> beneath the site ranged from a high of 28 71 feet below mean sea level (MSL) at MW-2 to a low <br /> of 29 48 feet below MSL at MW-8A and MW-8B The cumulative groundwater monitoring data <br /> are summarized in Table 1 <br /> Separate groundwater surface maps are included for the shallow-constructed wells (Figure 4) <br /> ' and the deep-constructed wells (Figure 5) Using the shallow-constructed wells, the <br /> groundwater gradient is approximately 0 0029 foot/foot in a north-northeast direction Using the j <br /> deep-constructed wells, the groundwater gradient is approximately 0 0038 foot/foot in a northerly <br /> ' direction These groundwater surface configurations are generally consistent with historical <br /> groundwater gradients and flow directions <br /> ■ <br /> 22 Groundwater Sampling and Analysis <br /> Groundwater was sampled from five monitoring wells (MW-2, MW-3, MW-5, MW-6 and MW-7), <br /> the two-well monitoring well cluster(MW-8A and MW-813), one of the deep soil vapor extraction <br /> wells (VW-2), and Irrigation Well#2 Each of the monitoring wells and the deep soil vapor <br /> extraction well was purged of at least three well volumes using a pump and disposable tubing <br /> Following purging and recharge, groundwater samples were collected from the wells using <br /> dedicated and disposable sampling bailers Irrigation Well #2 was allowed to flow at the <br /> wellhead until the downhole pump was automatically activated A groundwater sample was j <br /> collected directly at the wellhead through a sample port <br /> 5 <br />