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• • 1 ' MW 1 MW 2 MW 3 MW4 MW5 MW6 RPE:52.60 RPE:49.67 RPE:51.32 RPE:51.31 RPE: 50.54 RPE:51.34 X: 3239 X:21 X: 0 X:2452 X:212 X:2026 Date Y:264 Y: 509 Y: 0 Y:1068 Y:-311 Y:249 10/4/06 -36.44 -36.38 37.00 -35.76 -37.17 -36.34 4/12/07 -30.70 -29.08 -29.72 -29.27 -30.00 -29.81 6/14/07 -34.11 -34.25 -35.41 -33.13 -35.80 -33.81 8/16/07 -38.13 -39.10 Dry -37.31 -40.81 -37.76 12/13/07 -37.74 -35.93 -36.30 -36.64 -36.57 -37.20 3/18/08' -34.41 -32.10 -32.68 -33.07 -33.02 -33.39 4/14/08 -35.00 -33.80 -34.66 -33.88 -34.92 -34.21 9/8/08 dry dry dry 41.52 -45.49 -42.08 10/14/08 dry dry dry -42.40 -44.94 dry 3/30/09 -37.58 -35.21 -35.73 -36.32 -36.12 -36.64 6/29/09 dry -41.38 dry -39.17 -43.62 -40.78 Change -6.17 -2.85 -7.50 -4.14 The last line in Table 1 indicates the change in water level since the previous measurement on March 30. The water table declined 2.85 to 7.50 feet during the interval and wells 1 and 3 were dry while well 2 did not contain enough water to sample. Grouping the wells into triads and solving the three-point problem reveals the gradients across different portions of the site. The calculation gives the best estimate of the gradient at the center of the triangle formed by the three wells in the triad. For the triad consisting of wells 2, 5, and 6 the gradient was 2.97 feet per 1000 feet 193° clockwise from north. For the triad consisting of wells 2, 5, and 4 the gradient was 2.81 feet per 1000 feet 185° clockwise from north. For the triad consisting of wells 4, 5, and 6 the gradient was 1.78 feet per 1000 feet 220° clockwise from north. These calculated gradients are shown on Figure 1. Based on the measured water levels and known total depths, the volume of water resident in each well was calculated. Three times the resident volume was purged from each well using a 12-volt purging pump. pH, Specific Conductance, Temperature, and Turbidity were measured during purging. Measurements recorded during purging are shown in Table 2.