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q ' <br /> E f I <br /> Additional Site Assessment Report - August 2004 <br /> + VANCO TRUCK& AUTO PLAZA <br />' I 1033 West Charter Way, Stockton, California, I <br /> TABLE OF CONTENTS <br /> - M SECTION __ . ___ _ M _ T z _, PAGE <br />' 1 <br /> 1.0. INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <br />' 2.0. BACKGROUND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 <br /> 21 REGIONAL GEOLOGIC / HYDROGEOLOGIC SETTING 1 <br />' <br /> 22 FUEL-DISPENSING SYSTEM UPGRADE 2 <br /> 23 PREVIOUS SITE ASSESSMENTS 2 <br /> H- <br /> 1 <br /> 3.0. PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 ' <br /> 31 PILOT BORING ADVANCEMENT AND WELL COMPLETION 3 <br /> 1, <br /> 3 1 1 Soil Sampling 3 <br /> IS 3 12 Monitoring Well Completions ,4 <br /> 3 1 3 Monitoring Well Development 4 <br /> 32 CPT BORING ADVANCEMENT 4 <br />' 3 2 1 CPT Lithologic Investigation 5 <br /> 3 2 2 Soil and Ground Water Sample Collection 5 <br /> 33 SOIL AND GROUND WATER ANALYSIS' 6 <br />' <br /> 34 WELL HEAD ELEVATION AND GPS LOCATION SURVEY 6 <br /> 35 WELL MONITORING AND EVACUATION 7 <br /> 3 6 COLLECTION AND ANALYSIS OF GROUND WATER SAMPLES 7 <br /> 4.0. FINDINGS; . . ,,,.,.,. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <br /> . 7 <br /> 4f STRATIGRAPHY, <br /> � . 8 <br />' 42 HYDROGEOLOGICAL MODEL S <br /> 4 3 , ANALYTICAL RESULTS OF SOIL SAMPLES, 10 <br /> 44 f ANALYTICAL RESULTS OF GRAB GROUND WATER SAMPLES 10 <br /> 4 5 r GROUND WATER'GRADIENT AND FLOW DIRECTION 11 y <br /> k 4 6 ANALYTICAL RESULTS OF GROUND WATER SAMPLES <br /> I � ' <br /> - � F <br /> ' <br /> 50. SITE CONCEPTUAL'MODEL . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 . . . . . . . . . . . 11 <br /> 6.0. SUMMARY AND CONCLUSIONS . . . . .`. . . . . . . . . . . . . . . . .'. . . . . :: 13 <br /> I <br /> 7.0. RECOMMENDATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 <br /> I <br /> I ` <br /> Advanced GeoEnviranmental,Inc <br /> ti 1 <br /> t <br /> F <br />