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G�ologlcalTeeknfcsInc Page 2 <br /> Groundwater Monttonng Report <br /> Project No 425 2 <br /> August 6,2004 <br />' 0 TPH-G concentration in MW-2 decreased in comparison with the concentration on <br /> 113/04 <br />' • BTEX and TPH-G constituents have been detected in MW-201 during the last two <br /> monitoring events indicating the plume may be moving vertically <br />' • In MW-106, Xylenes and TPH-G have been found in this monitoring e=vent, and <br /> BTEX and TPH-G have been found in January 2004 monitoring event <br /> a Three monitored domestic wells tested during the April 2004 were non-detect for all <br />' analyzed constituents This suggests contamination has not migrated near the <br /> domestic wells <br />' 1.0 GROUNDWATER MONITORING <br />' 1.1 Hydrology of Site <br /> 11.1 Horizontal Groundwater Gradients <br />' The average water table elevation at the site on April 27, 2004 was 73 82 feet above mean sea <br /> level This represents an increase of 0 61 feet since the January 2004 monitoring event The <br /> water table groundwater gradient was 0 0013 ft/ft flowing N14°W <br /> The average groundwater elevation in the intermediate depth wells for the April 2004 <br /> monitoring event was 73 81 feet above mean sea level and the intermediate depth <br />' groundwater gradient was 0 0025 ft/ft flowing N89°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 0009 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 3 illustrates the April 27, 2004, shallow groundwater gradient <br /> ' The predominant ant groundwater flow is to the east-northeast with the slope ranging from <br /> ' 0 0014 to 0 0270 ft/ft in the intermediate wells Table 2 of Appendix A summarizes the <br /> intermediate groundwater gradients and levels to date, and Figure 4 illustrate the April 27, <br /> 2004, groundwater direction and gradient in the intermediate wells <br /> ' Table 2 also summarizes the groundwater level data from the deep wells, MW-201, and MW- <br /> 202 <br /> ' The historical water table and intermediate groundwater gradients are included in Figures 5 & <br /> 6—Shallow and Intermediate Rose Diagrams <br />