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DRYWELL CLOSURE AND INVESTIGATION WORK PLAN <br /> NEIL O. ANDERSON &ASSOCIATES <br /> TABLE OF CONTENTS <br /> EXECUTIVESUMMARY...................................................................................................... 1 <br /> 1.0 INTRODUCTION....................................................................................................... 1 <br /> 1.1 Purpose.............................................................................................................. 1 <br /> 1.2 Guidance Documents...........................................................................................2 <br /> 2.0 BACKGROUND.......................................................................................................... 2 <br /> ' 2.1 Site Location....................................................................................................... 2 <br /> 2.2 Site Description................................................................................................... 2 <br /> 2.3 Facility History and Current Operations.................................................................. 2 <br /> 2.4 Physical Setting................................................................................................... 3 <br /> ' 2.5 Geologic Conditions ............................................................................................. 3 <br /> 2.5.1 Regional Geology ........................................................................................... 3 <br /> 2.5.2 Site-Specific Geology...................................................................................... 3 <br /> 2.6 Hydrogeologic Conditions..................................................................................... 4 <br /> 2.6.1 Regional Hydrogeology................................................................................... 4 <br /> 2.6.2 Site-Specific Hydrogeology.............................................................................. 5 <br /> 3.0 DRYWELL DESTRUCTION.......................................................................................... 6 <br /> 3.1 Pre-Field Activities ............................................................................................... 6 <br /> 3.2 Destruction Activities............................................................................................ 6 <br /> 3.2.1 Well Destruction Methodology......................................................................... 6 <br /> 3.2.2 Waste Disposal............................................................................................... 7 <br /> 3.2.3 Well Protection............................................................................................... 7 <br /> 3.3 Health and Safety Plan......................................................................................... 7 <br /> 3.4 Drywell Destruction Deviations.............................................................................. 7 <br /> 4.0 SAMPLING METHODS ............................................................................................... 8 <br /> 4.1 Sampling Objectives............................................................................................. 8 <br /> 4.2 Sampling Locations and Depths ............................................................................ 8 <br /> 4.2.1 Groundwater.................................................................................................. 8 <br /> 4.2.2 Soil ............................................................................................................... 8 <br /> 4.3 Sampling Equipment and Collection Methods ......................................................... 9 <br /> 4.3.1 Groundwater.................................................................................................. 9 <br /> 902 Industrial Way• Lodi, CA 95240• 209.367.3701 • Fax 209.333.8303 02014 Neil 0. Anderson&Associates, Inc. <br />