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5.0 GROUNDWATER CONTAMINATION 20 <br /> 5.1 Time-Variance of Contamination 20 <br /> 5.2 Lateral Extent of Contaminated <br /> Groundwater 20 <br />' 5.3 Volume of Contaminated <br /> Groundwater 23 <br />' 6.0 REMEDIATION ALTERNATIVES 23 <br /> 6.1 Soil Remediation 23 <br />' 6.1.1 Ex-situ Treatment Alternatives 23 <br /> 6.1.2 In-situ Treatment Alternatives 26 <br /> 6.1.2.1 Bioremediation 26 <br /> 6.1.2.2 Vapor Extraction 29 <br /> 6.2 Groundwater Remediation 33 <br /> 6.2.1 Ex-situ Treatment Alternatives 33 <br /> 6.2.1.1 Carbon Filtration 33! <br /> t6.2.1.2 Disposal 34 <br /> 6.2.2 In-situ Treatment Alternatives 35 <br /> 6.2.2.1 Bioremediation 35 <br /> 6.2.2.2 Air Sparging 36 <br /> NO 7.0 REFERENCES CITED 38 <br /> 8.0 LIMITATIONS 38 <br /> TABLES <br /> TABLE 1 - Analytical Results of Soil Samples 5 <br />' TABLE 2 - Analytical Results of Water Samples 6 <br /> TABLE 3 - Relative Groundwater Elevations 8 <br /> TABLE 4 - Groundwater Stabilization Data 9 <br /> TABLE 5 - Analytical Results of Air Samples 33 <br /> FIGURES <br /> Figure 1 - Location Map 2 <br /> Figure 2 - Site Plan 3 <br /> Figure 3 - Vadose Zone Well RW-1 11 <br /> Figure 4 - Regional Stratigraphic Column 14 <br /> 14 Figure 5A - Cross Section A-A' 15 <br /> CNA 4ftl A d,1$­Ln. <br /> Pkv MA PAWL-28.94A.47 <br /> 1 <br />