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2 0 GROUNDWATER MONITORING, SAMPLING AND ANALYSIS <br /> On December 18, 2003 and March 25, 2004, to comply with quarterly groundwater monitoring <br /> requirements and to evaluate the effectiveness of groundwater extraction efforts, Ramage <br /> ' Environmental monitored and sampled 10 of the 11 monitoring wells, and collected groundwater <br /> samples from the nearby cemetery irrigation well #2 Monitoring well MW-1 was not monitored <br /> or sampled, due to damage to the wellhead and an obstruction downhole <br /> 21 Groundwater Monitoring <br /> During both monitoring events, depth-to-groundwater measurements were taken in all ten of the <br /> accessible groundwater monitoring wells to evaluate groundwater flow and gradient <br /> characteristics The cumulative groundwater monitoring data are summarized in Table 1 <br /> On December 18, 2003, the depth-to-groundwater beneath the site ranged from 46 41 feet <br /> below ground surface (bgs) at MW-4 to 50 12 feet bgs at 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 29 50 feet below mean sea level (MSL) at MW-2 to a low <br /> of 30 21 feet below MSL at MW-8A <br /> On March 25, 2004, the depth-to-groundwater beneath the site ranged from 43 39 feet bgs at <br /> MW-4 to 47 08 feet bgs at MW-7 The groundwater elevation beneath the site ranged from a <br /> high of 26 60 feet below MSL at MW-2 to a low of 27 03 feet below MSL at MW-813 <br /> For both sampling events, separate groundwater surface maps are included for the shallow- <br /> constructed wells (Figures 4 and 5) and the deep-constructed wells (Figures 6 and 7) Using the <br /> shallow-constructed wells, the groundwater gradient ranged from approximately 0 00246 to <br /> 0 00106 footlfoot in a northeastly direction Using the deep-constructed wells, the groundwater <br /> gradient ranged from approximately 0 00291 to 0 00187 foottfoot in a northeasterly direction <br /> These groundwater surface configurations are generally consistent with historical groundwater <br /> gradients and flow directions <br /> 2.2 Groundwater Sampling and Analysis <br /> During both sampling events, groundwater was sampled from eight monitonng wells (MW-2, <br /> MW-3, MW-4, MW-5, MW-6, MW-7, MW-8A, and MW-81B), two deep sod vapor extraction wells <br /> (VW-1 and VW-2), and Irrigation Well #2 Each of the monitoring wells and deep soil vapor <br /> extraction wells was purged of at least three well volumes using a pump and disposable tubing <br />