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W IR, <br /> Southwest, Inc. <br /> • 8.0 FIELD ACTIVITIES.............................................................................................................17 <br /> 8.1 EXPLORATORY EXCAVATION.................................................................................................17 <br /> 8.2 DRILLING AND SOIL SAMPLING..............................................................................................18 <br /> 8.3 GROUNDWATER GRAB SAMPLING..........................................................................................19 <br /> 8.4 DISPOSITION OF DRILL CUTTINGS AND WASTE WATER .........................................................20 <br /> 9.0 SOIL AND GROUNDWATER ANALYSIS.......................................................................20 <br /> 10.0 ANALYTICAL RESULTS .................................................................................................20 <br /> 10.1 SOIL ANALYTICAL RESULTS ................................................................................................20 <br /> 10.2 GROUNDWATER ANALYTICAL RESULTS...............................................................................22 <br /> 11.0 DISCUSSION AND EVALUATION OF FINDINGS ......................................................24 <br /> 11.1 SOIL CONDITIONS ................................................................................................................24 <br /> 11.2 GROUNDWATER CONDITIONS...............................................................................................26 <br /> 11.3 FATE AND TRANSPORT MECHANISMS..................................................................................28 <br /> 11.4 POTENTIAL RECEPTORS........................................................................................................29 <br /> 11.5 SOUTH DITCH ......................................................................................................................29 <br /> 12.0 CONCLUSIONS..................................................................................................................30 <br /> 12.1 HEAVY METALS...................................................................................................................30 <br /> • 12.2 STORM WATER MANAGEMENT PRACTICES..........................................................................30 <br /> 12.3 LEAKAGE FROM USTS AND ASTS........................................................................................30 <br /> 12.4 PCB CONTAMINATION AND CONCERNS...............................................................................31 <br /> 12.5 SURFACE STAINING AND DOCUMENTED PETROLEUM RELEASES..........................................31 <br /> 12.6 EQUIPMENT WASH AREA AND DISPOSAL OF WASH WATER................................................31 <br /> 12.7 IMPROPER STORAGE AND HANDLING OF HAZARDOUS MATERIALS AND PETROLEUM <br /> HYDROCARBONS .........................................................................................................................32 <br /> 12.8 BATTERIES AND QUALITY CONTROL ISSUES ........................................................................32 <br /> 12.9 AUTOMOBILE DEBRIS ON SOUTH DITCH BANKS ..................................................................32 <br /> 12.10 VEHICLE AND TIRE STORAGE.............................................................................................33 <br /> 12.11 ADJACENT PETROLEUM TERMINAL....................................................................................33 <br /> 13.0 RECOMMENDATIONS.....................................................................................................33 <br /> • <br /> 704. PRI.05 ii July 21, 2008 <br />