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' S [EC0R <br /> a[ECOR <br /> TABLE OF CONTENTS <br /> 10 INTRODUCTION 1 <br /> ' <br /> 20 SITE HISTORY .. 2 <br /> 21 Site Description 2 x_ <br /> 22 Groundwater Monitoring Zone Classification 2 <br /> 23 Previous Investigations 2 <br /> 24 Supply Well Survey 5 . 4 <br /> 25 Summary of Remedial Action 5 <br /> ' <br /> 30 CURRENT ASSESSMENT ACTIVITIES .. 6 <br /> 31 Site Health and Safety Plan 6 ' <br /> 32 Permitting 6 ' <br /> r <br /> 33 Subsurface Utility Clearance 6 VIA <br /> 34 Monitoring Well Installation 6 <br /> 3 4 1 Air-Rotary Method 6 <br /> 13 4 2 Sonic Drilling Method 7 <br /> 35 Soil Selection and Analysis 7 k 'a <br /> 36 Monitoring Well Development 7 <br /> 37 Monitoring Well Sampling and Analysis 8 <br /> ' <br /> 38 Well Surveying 8 <br /> 39 Soil Cuttings and Purge Water 8 <br /> 310 EDF Upload 8t <br /> ' 4 0 GEOLOGIC AND HYDROGEOLOGIC SETTINGS 9 <br /> 5 0 PETROLEUM HYDROCARBON DISTRIBUTION AND CONCENTRAITON TRENDS 11 ;' <br /> 51 Distribution of Petroleum Hydrocarbons Soil 11 <br /> 51 1 Distribution of Hydrocarbons in Soil 11 ' <br /> 5 1 1 1 Distribution of Hydrocarbons in Shallow Soil 11 <br /> 5 1 1 2 Distribution of Hydrocarbons in Intermediate Soil 11 <br /> 5 1 1 3 Distribution of Hydrocarbons in Deep Soil 11 s <br /> ' <br /> 52 Petroleum Hydrocarbons in Groundwater 11 <br /> 5 2 1 Distribution of TPHg in Groundwater 12 <br /> 5 2 1 1 A Monitoring Zone 12 <br /> 5 2 1 2 B Monitoring Zone 12 <br /> 5 2 1 3 C Monitoring Zone 12 <br /> ' <br /> 522 Distribution of Benzene in Groundwater 12 <br /> 5 2 2 1 A Monitoring Zone 12 <br /> 5 2 2 2 B Monitoring Zone 13 � <br /> 5 2 2 3 C Monitoring Zone 13 <br /> ' <br /> 523 Distribution of MtBE in Groundwater 13 <br /> 5 2 3 1 A Monitoring Zone 13 <br /> 5 2 3 2 B Monitoring Zone 13 <br /> ' 5 2 3 3 C Monitoring Zone 14 <br /> 524 Distribution of 1,2-DCA in Groundwater 14 <br /> 5 2 4 1 A Monitoring Zone 14 <br /> 5 2 4 2 B Monitoring Zone 14 r ' <br /> 5 2 4 3 C Monitoring Zone 14 <br /> •' 53 Dissolved Concentration Trends 14 <br /> 5 3 1 A Monitoring Zone Trends 14 <br /> Updated SCM 2005 doc I ,� <br /> 77CP 64409 05 0005 0�� <br /> E <br /> d+t 1 <br />