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7h3adwe11&Ro110 <br /> • <br /> TABLE OF CONTENTS <br /> 1.0 INTRODUCTION ...............................................................................................................1 <br /> 1.1 Purpose of Report ....................................................................................................2 <br /> 1.2 Definition of Operable Units ...................................................................................2 <br /> 1.2.1 Operable Unit 1............................................................................................3 <br /> 1.2.2 Operable Unit 2..........................................................................................10 <br /> 2.0 STUDY AREA INVESTIGATION ..................................................................................17 <br /> 2.1 Investigation Methodology....................................................................................17 <br /> 2.1.1 Surveying...................................................................................................17 <br /> 2.1.2 Drilling Methods........................................................................................17 <br /> 2.1.3 Groundwater Well Sampling Methodology...............................................18 <br /> 2.1.4 Laboratory Analyses and Quality Control Methodology...........................18 <br /> 2.2 Field Investigation at Operable Unit 1...................................................................20 <br /> 2.2.1 Area 10.........................................................................................................20 <br /> 2.2.2 Area 11.........................................................................................................20 <br /> 2.2.3 Area 20.......................................................................................................21 <br /> 2.3 Field Investigation at Operable Unit 2...................................................................21 <br /> • 2.3.1 Area 15.......................................................................................................21 <br /> 2.3.2 Area 16.......................................................................................................22 <br /> 2.3.3 Area 21.......................................................................................................22 <br /> 3.0 PHYSICAL CHARACTERISTICS OF THE STUDY AREA .........................................23 <br /> 3.1 Surface Features.....................................................................................................23 <br /> 3.2 Meteorology...........................................................................................................23 <br /> 3.3 Surface Water Hydrology......................................................................................23 <br /> 3.4 Regional Geology ..................................................................................................23 <br /> 3.5 Soils .......................................................................................................................24 <br /> 3.6 Hydrogeology ........................................................................................................24 <br /> 3.7 Demography and Land Use ...................................................................................25 <br /> 4.0 NATURE AND EXTENT OF CONTAMINATION........................................................25 <br /> 4.1 Environmental Impacts at Operable Unit 1 ...........................................................25 <br /> 4.1.1 Area 10.......................................................................................................25 <br /> 4.1.2 Area 11.......................................................................................................27 <br /> 4.1.3 Area 20.......................................................................................................28 <br /> 4.2 Environmental Impacts at Operable Unit 2 ...........................................................29 <br /> 4.2.1 Area 15.......................................................................................................29 <br /> 4.2.2 Area 16.......................................................................................................29 <br /> 4.2.3 Area 21 —404 West Fremont Street(Crystal Creamery)...........................30 <br /> • <br />