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<br /> 1
<br /> Du Pont Nom stolls
<br /> e y TABLE OF CONTENTS JOB NO.211-71-6
<br /> INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
<br /> SCOPE OF SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . ... . . . I
<br /> SITE CONDITIONS . . . . .. . .. . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1
<br /> BACKGROUND .. . 3
<br /> REGIONAL GEOLOGIC AND Hi'DROGEOLOGIC SUITING 7
<br /> -Water Well Locations . . . . . . .. .. . .. . .. . . . . 9
<br /> FIELD EXPLORATION . . . . . . . . . . . . . . . . . . . . . . . . . . 11
<br /> Borehole Advancement and Soil Sampling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
<br /> MonitorinS Well Installation . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . .. . .. . . . . . 14
<br /> Well Development and Water Sampling . . . . . . . . . . . . . . . . . .. . . . .. . . . . . . . . 15
<br /> GFOund-Water Gradient Detcrinination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
<br /> LABORATORY TESTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . .. . . . . I6
<br /> Physical Analyses of Soil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . 16
<br /> Chemical Analyses of Soil and Water .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . 16
<br /> RESULTS AND DISCUSSION . . . . - .
<br /> Subsurface Soils . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
<br /> Ground Water . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
<br /> Analytical Results -Sails . . 19
<br /> Analytical Results - Ground Water . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . 26
<br /> REMEDIATION ALTERNATIVES . . . . . . . . . . . . . . . . . . . . . .. . . . . • . . . . . . . . . . 35
<br /> Soil . . . . . . . . . . - . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
<br /> Ground Water . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
<br /> CONCLUSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... .. . . . . . . 38
<br /> STUDY LIMITATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
<br /> REFERENCES . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . -. . . . . . . 40
<br /> f LIST OF PLA'T'ES
<br /> PLATE 1 - SITE PHOTOGRAPH
<br /> PLATE 2- GEOLOGIC CROSS SECTIONS A-A', B-13', AND C-C'
<br /> PLATE 3 - CROSS SECTIONS SHOWING ZONES OF HYDROCARBON
<br /> CONTAMINATION
<br /> PLATES 4-14- GROUND-WATER ANALYSES DATA MW-1, MW-15, MW-16,AND MW-18
<br /> _ THROUGH MVI-25
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