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TABLE OF CONTENTS <br /> ' Page <br /> 1.0 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 <br /> 2.0 GENERAL SITE INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . 1 <br /> 2.1 Current Site Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 <br /> ' 2.2 Regional Geology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 <br /> 3.0 PREVIOUS INVESTIGATIVE WORK AT THE SITE . . . . . . . . . . . . . . 2 <br /> ' 3.1 April 1992 Drilling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 <br /> 3.1.1 Drilling and Soil Conditions . . . . . . . . . . . . . . .. . . . . . 2 <br /> 3.1.2 Soil Sample Collection and Analytical Results . . . . . . . . . 2 <br /> 3.1.3 Monitoring Wells and Ground Water Level Measurements . 3 <br /> 3.1.4 Ground Water Sample Collection and Analytical Results . . . 3 <br /> 3.2 December 1992 Drilling . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 <br /> 3.2.1 Drilling and Soil Conditions . . . . . . . . . . . . . . . . . . . . 4 <br /> 3.2.2 Soil Sample Collection and Analytical Results . . . . . . . . . 4 <br /> 3.2.3 Monitoring Wells and Ground Water Level Measurements . 5 <br /> 3.2.4 Ground Water Sample Collection and Analytical Results . . . 5 <br /> 3.3 Tank Removal Activities . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 <br /> 3 . . . . . . . . . • . • . . . . . . . . . . <br /> 3.1 Tank Basin Sampling . . 6 <br /> 3.3.2 Piping Trench Sampling 6 <br /> 3.4 Limited Soil Gas Screening . . . . . . . . . . . . . . . . . . . . . . . . . . 6 <br /> ' 3.4.1 Test Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 <br /> 3.4.2 Test Results 7 <br /> 4.0 CURRENT PHASE OF WORK--GROUND WATER <br /> ' MONITORING AND SAMPLING . . . . . . . . . . . . . . . . . . . . . . . .. . . 7 <br /> 4.1 July 1993 Ground Water Level Measurements . . . . . . . . . . . . . . . 7 <br /> 4.2 July 1993 Ground water Sample Collection and A-nalytical Results . . 7 <br /> 5.0 SUMMARY OF RESULTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 <br /> 5.1 Subsurface Soil Conditions and Distribution <br /> of Petroleum Constituents in Soil . . . . . . . . . . . . . . . . . . . . . . . 8 <br /> 5.2 Ground Water Conditions and Distribution <br /> ' of Petroleum Constituents in Ground Water . . . . . . . . . . . . . . . . 9 <br /> 5.3 Presence of Chlorinated Compounds in Ground Water . . . . . . . . . . 10 <br /> ' 6.0 AQUIFER AND SOIL VAPOR EXTRACTION TESTING . . . . . . . . . . . 10 <br /> 6.1 Aquifer Pumping Test . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 <br /> 6.2 Vapor Extraction Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 <br /> ' i <br />