three well site check bldg lch-4022

TABLE OF CONTENTSPAGEl.OlNTRODUCTlON ........................................................... 11.1 Definition of Terms .................................................... 12.0 BACKGROUND ............................................................. 32.1 Site Description ....................................................... 32.2 Land and Water Use ................................................... 32.3 Regional Geology ..................................................... 32.4 Regional Hydrogeology ................................................. 73.0 INVESTIGATIVE METHODS .................................................... 83.1 Soil Sampling and Monitoring Well Installation ................................. 83.2 Groundwater Sampling ................................................. 93.3 Well Elevation Survey .................................................. 93.4 Groundwater Monitoring ................................................ 94.0 INVESTIGATIVERESULTS ................................................... 114.1SiteGeology ........................................................ 114.2SiteHydrogeology ................................................... 114.3 Presence of Hydrocarbons ............................................. 114.3.1 Adsorbed-Phase Hydrocarbons ................................... 114.3.2 Dissolved-Phase Hydrocarbons ................................... 154.3.3 Liquid-Phase Hydrocarbons ..................................... 154.4 Drill Cutting and Purge Water Disposal ..................................... 164.5TechnicalSummary ................................................... 175.0 RECOMMENDATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186.0 REFERENCES............................................................. 19