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Geological rechntcs Inc Page 2 <br />' Groundwater Momtonng Report <br /> Project No 425 2 <br /> July 26,2002 <br /> 1 _ <br /> • All of the deeper screened wells (MW-102, MW-105 MW-107 and MW-202) were <br />' non-detect for the event This is the seventh consecutive event that this condition <br /> has been documented <br />' 1.0 GROUNDWATER MONITORING <br />' 1.1 Hydrology of Site <br /> 1.1.1 Horizontal Groundwater Gradients <br /> The average water table elevation at the site on June 5, 2002, was 73 82 feet above mean sea <br /> level This represents a increase of 0 01 feet since the February 2002 event However, <br /> depth to water could not be measured in MW-6 due to obstructions by tree roots and the <br /> water level elevation in this well raises the site average The water table groundwater <br /> gradient was 0 0014 ft/ft flowing N21°E <br /> The average groundwater elevation in the intermediate depth wells (MW-102, MW-105 & <br /> MW-107) for the monitoring event was 73 70 feet above mean sea level and the <br /> intermediate depth groundwater gradient was 0 0023 ft/ft flowing N80°E <br />' A review of the groundwater gradients shows that the predominant groundwater flow varies <br /> from north to northeast with the slope ranging from 0 0011 up to 0 0044 ft/ft in the water <br /> table wells Table 1 of Appendix A summarizes the water table groundwater gradients and <br />' levels to date, and Figure 2 illustrates the June 5, 2002, groundwater direction and gradient <br /> The predominant groundwater flow is to the east-northeast with the slope ranging from <br /> 0 0016 to 0 027 ft/ft in the intermediate wells Table 2 of Appendix A summarizes the <br /> intermediate groundwater gradients and levels to date, and Figure 3 illustrate the June 5 <br /> 2002, groundwater direction and gradient in the intermediate wells <br /> ITable 2 also summarizes the groundwater level data from the deep well, MW-202 <br />' The historical water table and intermediate groundwater gradients are included in Figures 4 <br /> & 5- Shallow and Intermediate Rose Diagrams <br /> 1 1.2 Vertical Groundwater Gradients <br /> Vertical groundwater gradients were calculated using MW-2/MW-102 <br />' (shallow/intermediate well pair) and MW-102/MW-202 (intermediate/deep well pair) <br /> During the June 2002 event the vertical groundwater gradient in the shallow/intermediate <br /> well pair was in an upward direction with a magnitude of 8 tines that of the horizontal <br />