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FORMER AMERICAN FOREST PRODUCTS Table of Contents <br /> Closure Summary Report July 2009 <br /> URS Project 17322736 Page i <br /> TABLE OF CONTENTS <br /> 1.0 INTRODUCTION...................................................... . ..... ............:..: ......:,.................................... 1=1 <br /> 1.1 PURPOSE................................................ .............................. ......1-1 <br /> 1.2 . REPORT ORGANIZATION.... .................................................... 1-1 <br /> 2.0 BACKGROUND......................................................... ......................................................................'2-1 <br /> 2.1 SITE SETTING......................... ......................-----........:...............................2-1 <br /> 2.2 SITE USE HISTORY ...............................j......................................................................2-1 <br /> : <br /> 2.3 SITE ENVIRONMENTAL INVESTIGATION HISTORY............................................2-1 <br /> �w <br /> 3.0 GROUNDWATER......................................................I............................................. .3-1 <br /> 3.1 HYDROGEOLOGY(6.6-2) .................... . .. ..... .... . . .. ............ . <br /> .. . .... .. ..3-1 <br /> w 3.2 GROUNDWATER USE..................I......... .......................................::.:.................. ...3-1 <br /> 3.3 SECOND QUARTER 2009 GROUNDWATER MONITORING...........'......................3-2 <br /> 3.3.1 Field Methods.................... <br /> ..........3-2 <br /> 3.3.2 Laboratory Analysis and QA........ <br /> .---- ................I..... ..........4.4.....--.. 3-3 <br /> 3.4 GROUNDWATER CONDITIONS.................................................................................3-4 <br /> r^; 3.4.1 Source Areas of Groundwater Constituents of Concern.....................................3-4 <br /> µ_ 3.4.2 Distribution of Site Groundwater Constituents of Concern................................3-4 <br /> 3.3.4 Trends in 1,2-DCA Concentrations.....................................................................3-5 <br /> 3.3.5 Mass of 1,2-DCA in Groundwater!.....................................................................3-5 <br /> 4.0 SOIL CONDITIONS AND REMEDIATION........... <br /> ................................ .....................................4-1 <br /> 4.1 SOIL CORRECTIVE ACTIONS............... :..:......::f.............---......................--.................4 1 <br /> 4.2 RESIDUAL SOIL CONTAMINATION...�:..................:.......................................... . . <br /> 4-1 <br /> . <br /> -. 4.3 MASS OF HYDROCARBON IN SOILS PRIOR TO AND FOLLOWING <br /> EXCAVATION.......... :.........:......... ...... ..............:......:...... :......:.4-2 <br /> 5.0 MODELING TO ESTIMATE IMPACT OF SOUL CONTAMINATION ON <br /> GROUNDWATER.............................................:.. :...............::..................................................5-1 <br /> I A 1. <br /> 6.0 RWQCB TIER 1 ENVIRONMENTAL RISK ASSESSMENT..::............... <br /> 7.0 RATIONALE FOR SITE CLOSURE..............................................................................................7-1 <br /> 1 <br /> v 8.0 REFERENCES......................................................... ..................................................................8••1 <br /> �� KAWpmms1227361Ameni Forest\Closure-Smnmar7-Report-RevOl.doc <br />