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TABLE OF CONTENTS _ <br /> HYDROGEOLOGIST'S TOXIC AND HAZARDOUS SUBSTANCE <br /> LETTER OF OPINION . . . . . . . . . . . . . . . . . . . . . <br /> 1. 0 SUMMARY . . . . . . . . . . . . . . . . . . . . . . . . 1 <br /> 1.1 TERMS OF REFERENCE . . . . . . . . . . . . . . . . 1 <br /> 1.2 SUMMARY OF FINDINGS . . . . . . . . . . . . . . . 1 <br /> 1.2.1 Site Description . . . . . . . . . . . . . . 1 <br /> 1.2.2 Previous Site Use . . . . . . . . . . . . . 4 <br /> 1.3 LIMITATIONS OF THIS ASSESSMENT . . . . . . . . . . 6 <br /> 2. 0 PURPOSE AND SCOPE OF THIS WORK . . . . . . . . . . . . . 7 <br /> 2 .1 PURPOSE . . . . . . . . . . . . . . . . . . . . . . 7 <br /> 2.2 APPROACH . . . . . . . . . . . . . . . . . . . . . 7 <br /> 2.3 SCOPE . . . . . . . . . . . . . . . . . . . . . . . 8 <br /> 3.0 INVESTIGATIVE METHODS . . . . . . . . . . . . . . . . . 9 <br /> 3. 1 OVERVIEW . . . . . . . . . . . . . . . . . . . . . 9 <br /> 3.2 TASK 1: RECORDS SEARCH . . . . . . . . . . . . . 9 <br /> 3.2. 1 Overview . . . . . . . . . . . . . . . . 9 <br /> 3 .2.2 Subtask 1-1: Review of Regulatory Records 9 <br /> 3 .2.3 Subtask 1-2: Review of Water Use, Soil, <br /> Geologic and Hydrogeologic <br /> Records . . . . . . . . . 10 <br /> 3 .2 .4 Subtask 1-3: Review of Aerial Photographs 10 <br /> 3.2.5 Subtask 1-4: Review of Chain-Of-Title . . . . . <br /> Records . . . . . . . . . . . . . . . . . 11 <br /> 3.3 TASK 2: SITE SURVEY . . . . . . . . 11 <br /> 3.3 . 1 Subtask 2-1: Interviews With Former . . . . . . <br /> Employees . . . . . . . . . . . . . . . . 11 <br /> 3.3 .2 Subtask 2-2: Site Walk-Through . . . . . . 11 <br /> 3 .4 TASK 3: INTERIM REPORTING . . . . . . . . . . . 11 <br /> 4.0 DISCUSSION OF FINDINGS . . . . . . . . . . . . . . . . 13 <br /> 4. 1 SITE DESCRIPTION . . . . . . . . . . . . . . . . 13 <br /> 4.2 SITE FACILITIES . . . . . . . . . . . . . . . . . 13 <br /> 4. 3 NEIGHBORING FACILITIES . . . . . . . . . . . . . 14 <br /> 4.4 REGIONAL GEOLOGY, HYDROGEOLOGY, AND WATER USE . . 15 <br /> 4.4.1 Geology . . . . . . . . . . . . . . . . . 15 <br /> 4.4.2 Hydrogeology . . . . . . . . . . . . . . . 16 <br /> 4.4.3 Surface Water . . . . . . . . . . . . . . 16 <br /> 4.4.4 Public Water Use . . . . . . . . . . . . . 16 <br /> 4.5 CURRENT USE OF THE SITE . . . . . . . . . . . . . 18 <br /> 4.6 FORMER USE OF THE SITE . . . . . . . . . . . . . 18 <br /> 4.7 FUEL STORAGE geank <br /> . . . . . . . . . . . . 19 <br /> 4.7. 1 Above-Ground Stora Ts (ASTs) . . . . 19 <br /> 4.7.2 Underground Storage Tanks (USTs) . . . . . 19 <br /> 4.8 WASTE HANDLING, STORAGE, AND DISPOSAL . . . . . . 19 <br /> 4.8. 1 Overview . . . . . . . . . . . . . . . . . 19 <br /> iii <br />