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S <br /> LEnvironmental Site Assessment <br /> MOUNTAIN HOUSE TUSO PROPERTY <br /> LSan Joaquin County, California <br /> I TABLE OF CONTENTS <br /> INTRODUCTION........................................................................................................................1 <br /> LPurpose and Scope...................................................................................................................1 <br /> FINDINGS...................................................................................................................................3 <br /> -j Site Description........................................................................................................................3 <br /> LWindshield Survey...................................................................................................................6 <br /> SiteHistory...............................................................................................................................6 <br /> LOwnership ............................................................................................................................6 <br /> OwnerInterview.......................................................................................................................7 <br /> Archived Building Records..................................................................................................7 <br /> L Agricultural Review.................................................................................................................7 <br /> Historic Topographic Maps Review ........................................................................................8 <br /> 1914/1916 Map ....................................................................................................................8 <br /> L1978/1980 Map ....................................................................................................................8 <br /> Aerial Photographic Review.............................................. <br /> 1963 Air Photos....................................................................................................................9 <br /> 1975 Air Photos....................................................................................................................9 <br /> b1999 Air Photos....................................................................................................................10 <br /> Hydrogeologic and Soils Settings............................................................................................10 <br /> LGround Water.......................................................................................................................10 <br /> RegionalGeology.................................................................................................................1 l <br /> Soils......................................................................................................................................11 <br /> RadonPotential....................................................................................................................12 <br /> Municipal Infrastructure...........................................................................................................13 <br /> PotableWater Supply...........................................................................................................13 <br /> Wastewater Management.....................................................................................................13 <br /> Stormwater Management.....................................................................................................13 <br /> Agency Database Review.........................................................................................................14 <br /> State and County Databases.................................................................................................15 <br /> California Division of Oil and Gas ......................................................................................15 <br /> LCONCLUSIONS..........................................................................................................................15 <br /> LIMITATIONS............................................................................................................................17 <br /> L <br /> L <br /> WALLACE•KUHL <br /> Sr ASSOCIATES INC. <br />