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Value Engineering conducted a continuity test of the leachate collection and removal system(LCRS)on August 23 and 24, 2013 at the Forward Unit. The tracer dye test results indicate that continuity is present across the LCRS units WMU-F North and WMU-F West, and no excessive leachate is backed up in the drainage layer or sump of the LCRS units. 4.5 AUSTIN UNIT Groundwater Groundwater elevations measured during the 2013 monitoring year generally reflect seasonal precipitation patterns. Hydrographs depicting historical groundwater elevations are presented in Appendix D and indicate generally static trends. During the 2013 monitoring year groundwater flow was generally directed to the north, northeast and east. However, in addition to the north,northeast and east flow directions groundwater flow was also noted to the northwest during the second quarter and to the southeast during the first quarter. These anomalous flow directions are believed to be the result of adjacent agricultural pumping. Groundwater generally flowed at a gradient between 0.001 ft/ft to 0.004 ft/ft below the Austin Unit in 2013. Groundwater quality conditions beneath the Austin Unit during the 2013 monitoring year are generally similar to those observed in the previous monitoring year. For DMP wells, CLs were consistently exceeded during the 2013 monitoring year at wells AMW-12 and AMW-13; and intermittently in wells AMW-6,AMW-7, and AMW-14. Well AMW-13 consistently contained VOCs at concentrations greater than PQLs and wells AMW-6 and AMW-14 contained at least one VOC at a concentration greater than PQLs during three of the four monitoring quarters (well AMW-14 was not sampled during the third quarter). In the CAP wells, VOCs were consistently detected in wells AMW-1 and AMW-19BR at concentrations exceeding the PQL; during two quarters at well AMW-10; and during one quarter at well AMW-19. Trend analyses indicate increasing trends were noted for three VOC constituents in well AMW-1 during each quarter. The increasing trend exhibited for cis-1,2-DCE at well AMW-1 suggests reductive dechlorination is occurring in the vicinity of this well. Decreasing trends were noted for at least one VOC constituent(for at least three quarters)during the 2013 monitoring year at wells AMW-1,AMW-4, AMW-10,AMW-11, and AMW-19BR. In response to continued detection of VOCs in groundwater downgradient of the Austin Road Unit,the RWQCB issued a CAO on December 8, 2008. Forward has installed 19 additional groundwater monitoring wells downgradient of the Austin Unit as part of an on-going EMP investigation. Surface Water Surface water samples were collected quarterly(except the fourth quarter 2013; dry)from surface water stations ASW-1 and ASW-2 during the 2013 monitoring year. With the exception of a trace concentration of toluene in the sample from ASW-2 during the third ® C:\2013-0021\FA_4Q13.dm 16 Geo-Logic Associates