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Table of Contents <br /> Introduction....................................................................................... <br /> RegulatoryRequirements................................................................................................................ 1 <br /> Underground Diesel-Fuel System Chronology............................................................................... l <br /> GeologicSetting..............................................................................................................................4 <br /> SoilSampling..................................................................................................................................6 <br /> Laboratory Analytical Methodology............................................................................................. 12 <br /> LaboratoryAnalytical Results....................................................................................................... 12 <br /> LeachingPotential Analysis.......................................................................................................... 14 <br /> Conclusion.................................................................................................................................... 18 <br /> References..................................................................................................................................... 19 <br /> List of Tables <br /> Table 1. Dates of Soil Sampling Events................................................................... <br /> Table 2. Analytical results from soil samples collected from the 850-DlU1 tank <br /> excavation 13 <br /> Table 3. Site characteristics and scores for diesel-containing soil............................................... 17 <br /> Table 4. Site characteristics and scores for diesel-containing bedrock........................................ 17 <br /> List of Figures <br /> Figure 1. Locations of Building 850 and the 850-DlUl tank excavation,LLNL, <br /> Site 300. <br /> .................................................................................................................... <br /> Figure 2. Location of Building 850 and the 850-DlUl tank excavation......................................3 <br /> Figure 3. Ground water elevation contour map for the Building 850 Area, third <br /> quarter1990..............................................................................................................5 <br /> Figure 4. Location of exploratory boreholes at the 850-DlU1 tank excavation............................7 <br /> Figure 5. Geologic cross section across the 850-DlUl tank excavation,north to south...............9 <br /> Figure 6. Geologic cross section across the 850-D1U1 tank excavation, east to west. ............... 10 <br /> Figure 7. Location of cross sections at 850-DlUl tank excavation............................................. 11 <br /> i <br />