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f `�ir7 <br /> , t ! <br /> PROBLEM ASSESSMENT REPORT <br /> 6131 Pacific Ave , Stockton, CA <br /> Aegis Project No 90-020 <br /> Page 1 <br /> TABLE OF CONTENTS <br /> h. 0 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . 1 <br /> 1. 1 Purpose . . . . . . . . . . . . . . . . . . . . . . 1 <br /> 1. 2 Scope . . . . . . . . . . . . . . . . . . . . . . . 1 <br /> 2 . 0 BACKGROUND INFORMATION . . . . . . . . . . . . . . . . . 3 <br /> 2 . 1 Site Location . . . . . . . . . . . . . . . . . . . 3 <br /> 2 .2 Site Description . . . . . . . . . . . . . . . . . . 3 <br /> 2 . 3 Tank Storage Products 4 <br /> 3 . 0 RESULTS OF SUBSURFACE INVESTIGATION . . . . . . . . . . . 5 <br /> 3 . 1 Soil Conditions . . . . . 5 <br /> 3 . 2 Soil Sample Analytical Result; 6 <br /> 3 . 3 Hydrogeologic Conditions . . . . . . . . . . . . . . 9 <br /> 3 . 4 Ground Water Analysis . . . . . . . . . . . . . . . 9 <br /> 4 . 0 DISCUSSION OF RESULTS . . . . . . . . . . . . . . . . . . 11 <br /> 4 . 1 Extent of Petroleum Hydrocarbons in Soil . . . . . . 11 <br /> 4 . 2 Hydrogeologic Conditions . . + 11 <br /> 4 . 3 Petroleum Hydrocarbons in Ground Water . . . . . . . 12 I <br /> 4 . 3 . 1 Free Product . . . . . . . . . . . . . . . . 12 <br /> 4 . 3 . 2 Dissolved Petroleum Hydrocarbons . . . . . . 12 <br /> 5 . 0 CONCLUSIONS . . . . . . . . . . . . . . . . . . . . . . . 13 <br /> 6. 0 REMARKS/SIGNATURES . . . . . . . . . . . . . . . . . . . 14 <br /> 8 . 0 REFERENCES . . . . . . . . . . . . . . . . . . . . . . . 15 <br /> i <br /> 1 <br />