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_r1 <br /> CONTENTS <br /> 4 ' EXECUTIVE SUMMARY i <br /> CERTIFICATION N <br /> 1 INTRODUCTION 1 <br /> ' 2 BACKGROUND 4 <br /> ' 2 1 SITE DESCRIPTION AND HISTORY 4 <br /> 2 2 PREVIOUS SITE ENVIRONMENTAL ACTIV=S 4 <br /> 3 SITE HYDROLOGY, GEOLOGY AND HYDROGEOLOGY 7 <br /> ' 3 1 REGIONAL HYDROLOGIC SETTING AND HISTORY 7 <br /> 3 2 SITE SOIL CONDITIONS 8 <br /> 3 3 SITE GROUNDWATER CONDITIONS 8 <br /> 4 INVESTIGATION METHODS 10 <br /> 4 1 PERNVIITTING 10 <br /> ' 4 2 DRILLING AND SAMPLING 10 <br /> 4 21 Monitoring Well Drilling and Installation Hollow-Stem Auger Method 10 <br /> 4 2 2 Simultaneous Soil and Groundwater Sampling 11 <br /> 4 2 3 Simulprohe Sampling 11 <br /> 4 2 4 Groundwater Well Installation 12 <br /> ' 4 3 LABORATORY ANALYSES 13 <br /> 4 31 Soil 14 <br /> 432 Water 14 <br /> ' 4 4 QUALITY ASSURANCE/QUALITY CONTROL 15 <br /> 4 5 WELL DEVELOPMENT 15 <br /> ' 4 6 WELL.SURVEY 16 <br /> ' 4 7 QUARTERLY GROUNDWATER MONITORING 16 <br /> 5 RESULTS 17 <br /> ' 5 1 MONITORING WELL INSTALLATION 17 <br /> 5 2 SITE SUBSURFACE STRATIGRAPHY 17 <br />