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1 <br /> Updated Srte Conceptual Model and Fourth Quarter 2002 Momtormg and Remediation Report <br /> Cleanup and Abatement Order No 5-00-707 EAI Project No 1232 <br />' TABLE OF CONTENTS <br /> Page <br />' 1.0 INTRODUCTION................................................................................................. 1 <br /> 11 Background l <br /> 1 1 1 Wards Site 1 <br />' 1 12 Wards Site Redevelopment 1 <br /> 1 1 3 Unocal Site 1 <br /> 1 1 4 Robinhood Irrigation Well (RIW) 2 <br /> 1 1 5 Cleanup and Abatement Order 3 <br /> 2.0 SITE CONCEPTUAL MODEL UPDATE.......................................................... 4 <br /> 3.0 GROUND WATER MONITORING......................................................... ......... 5 <br /> 3 1 Ground Water Sampling 5 <br />' <br /> 32 Effluent Handling 5 <br /> 3 3 Analytical Testing 5 <br />' 4.0 REMEDIATION SYSTEM STATUS REPORT ................................................ 7 <br /> 5.0 DISCUSSION........................................................................................................ 8 <br /> 5 1 Ground Water Elevation Contour Maps 8 <br /> 52 Ground Water Flow Direction and Magnitude 8 <br /> 53 Monitoring Well Hydrographs 8 <br /> 54 TPH-G and Benzene Isoconcentratzon Maps 8 <br /> 55 Analytical Testing Results 9 <br /> 5 5 1 Units A and B Wells 9 <br />' 5 5 2 Units C and D Wells (MW-81), MW-23 SID and MW-24S/D 9 <br /> 5 5 3 Well MW-9 and Other Perimeter Wells 9 <br /> 6.0 RECOMMENDATIONS........................................................................ ...... 10 <br /> 7.0 LIMITATION....................................................................................................... 11 <br />■ <br /> r <br /> BHM 1232R02D1 -1- <br /> ENVIRONMENTAL AUDIT, WC <br />