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TABLE OF CONTENTS (cont.) <br /> Page <br /> 6 0 GROUND WATER REMEDIATION ALTERNATIVES 16 <br /> ' 61 IN-SITU AIR SPARGING 16 <br /> 611 Principles 16 <br /> 6 1 2 Basic System Design 16 <br /> ' 6 1 3 Monitoring Activities 17 <br /> 614 Feasibility 17 <br /> ' 6 1 5 Field Pilot Test 17 <br /> PWgedures 17 <br /> Results 18 <br /> ' 616 Duration 19 <br /> 6 1 7 Cost 19 <br /> 62 GROUND WATER EXTRACTION 19 <br /> ' 6 2 1 Ground Water Treatment Methods 20 <br /> 6 2 2 Feasibility Testing 20 <br /> 6 2 3 Duration 20 <br /> ' 624 Cost 21 <br /> 63 IN SITU BIOREMEDIATIONBIOENHANCEMENT 21 <br /> 63 1 Nutrient Requirements and Toxicity 21 <br /> 6 3 2 Monitoring Activities 22 <br /> 63 3 Feasibility Studies 22 <br /> ' 6 3 4 Duration 22 <br /> 6 3 5 Cost 23 <br /> 64 NATURAL ATTENUATION 23 <br /> t7 0 RECOMMENDATIONS FOR REMEDIATION OF HYDROCARBON- <br /> IMPACTED SOIL 24 <br /> ' 8 0 RECOMMENDATIONS FOR REMEDIATION OF HYDROCARBON- <br /> IMPACTED GROUND WATER 24 <br /> ' <br /> 90 LIMITATIONS 26 <br /> { <br /> Advanced Ceol ,ironmental,Inc <br />