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3. Figure 2-4: It is unclear whether Figure 2-4 depicts a groundwater depression or a cone <br /> in the northwest part of the figure. It is difficult to determine what the groundwater <br /> feature is due to the lack of labeled groundwater contours and appropriately grouped <br /> wells. If the feature is a depression,the contours are not marked with"teeth"to indicate <br /> this, and if it is a cone, the contours are not labeled with feet msl to indicate the contour <br /> interval. For example,LM135B, 51.09 feet msl, and LM10213, 53.04 feet msl, are within <br /> what appears to be the 53 foot msl contour and should be between the 51 and 52 foot msl <br /> contours and the 53 and 54 foot msl contours, respectively. Please correct and label the <br /> groundwater contours to accurately reflect the groundwater features on the figure, or mark <br /> the wells as not being used to determine groundwater level contours. <br /> 4. Tables 3-3 and 3-6: Table 3-3 indicates that at least one of three blank samples was <br /> contaminated with gasoline (3.7 micrograms per liter [ug/L]), toluene (0.625 ug/L) and <br /> total xylenes (0.998 ug/L),but Table 3-6 indicates that only two total xylene sample <br /> results were qualified. Please explain whether non-detects were qualified as a result of the <br /> blank contamination. <br /> 2 <br />