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N S ' A TABLE OF CONTENTS (continued) ' - 8 2 5 Cost - 17 8 3 NATURAL. ATTENUATION 17 - 8 3 1 Principles 17 ' 8 3 2 Duration 17 83 3 Feasibility 18 ` 8 3 4 Estimated Costs 18 ' 84 NO FURTHER ACTION' ° ' 18 9.0. RECOMMENDATIONS 18 ' 9 1 REMEDIATION OF HYDROCARBON-RvIPACTED SOIL 19 9 2 REMEDIATION OF HYDROCARBON-IMPACTED GROUND WATER 19 r f ' 100 LIMITATIONS 19 LIST OF FIGURES t ti ' Figure 1 -Location Map Figure 2 -Site Map Figure 3 -Site Map-Former Dispenser Islands, Piping and UST Locations ' Figure 4-Site Map-Soil Boring Locations Figure 5 -Lanes of Section Figure 6- Geologic Cross Section A -A' lie Figure 7 - Geologic Cross Section B-B' Figure 8 - Geologic Cross Section C- C' Figure 9 - Geologic Cross Section D-D' ' Figure 10 - Geologic Cross Section E-E' Figure 31 - Geologic Cross Section F- F' Figure 12 -Lateral Extent of Irreyacted Soil ' Figure 13 - Cross Section A -A'-Hydrocarbon-Impacted Soil Figure 14 - Cross Section B-B'-Hydrocarbon-Impacted Soil Figure 15 - Cross Section C- C'-Hydrocarbon-Impacted Soil ' Figure 16 - Cross Section D-D'-Hydrocarbon-Impacted Soil Figure 17 - Cross Section E- E'-Hydrocarbon-Impacted Soil , 1 Figure 18 - Cross Section F-F'-Hydrocarbon-Impacted Soil Figure 19 -Hydrocarbon-Impacted Ground Water- TPH-d 4 ' Figure 20 -Hydrocarbon-Impacted Ground Water- TPH-g Figure 21 -Hydrocarbon-Impacted Ground Water-Benzene Figure 22 -Hydrocarbon-Impacted Ground Water-MTBE Figure 23 -Areas for Mass Calculations- TPH-d Figure 24-Areas for Mass Calculations- TPH-g LIST OF TABLES Table 1 - Ground Water Elevation Data Table 2 -Analytical Results of Soil Samples -EPA Methods 8015MI8020 Table 3 -Analytical Results of Soil Samples-EPA Method 8260M Table 4 -Analytical Results of Soil Samples- UST Removal EPA Methods 8015MI8020 Advanced GeoEnvironmental,Inc '