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EC ® R <br /> . Additional Site Assessment and Site Conceptual Model <br /> 7-11 Store#14117 <br /> September 30, 2005 <br /> Page 1 <br /> TABLE OF CONTENTS <br /> 1 0 INTRODUCTION 3 <br /> 1 1 OBJECTIVES 3 <br /> 2 0 SITE DESCRIPTION AND FEATURES 3 <br /> 21 Geology 3 <br /> 2 2 Hydrogeology 4 <br /> 2 2 1 Groundwater Flow Rates and Directions 4 <br /> 222 Groundwater Use 5 <br /> 2 3 Surface Water 5 <br /> 2 4 Local Land Use 5 <br /> 2 4 1 Aerial Photograph Review 5 <br /> 242 Topographic Map Review 5 <br /> 3 0 PREVIOUS INVESTIGATIONS 5 <br /> 4 0 SOIL AND GROUNDWATER ASSESSMENT 6 <br /> 41 Site Health and Safety 7 <br /> 42 Permitting, Utility Location, and Access Agreements 7 <br /> 43 Soil Borings and Sampling 7 <br /> 44 Current Soil Data Summary 8 <br /> 45 Estimated Mass of Petroleum Hydrocarbons Remaining in Soil 8 <br /> 46 Groundwater Monitoring and Sampling 8 <br /> 47 Groundwater Petroleum Hydrocarbon Concentrations 8 <br /> 48 Estimated Mass of Petroleum Hydrocarbons Remaining In Groundwater 9 <br /> 5 0 SOURCES OF IMPACTS g <br /> 60 POTENTIAL GROUNDWATER RECEPTORS 9 <br /> 70 CONCLUSIONS 10 <br /> 80 STATEMENT OF LIMITATIONS 10 <br /> 90 REFERENCES 11 <br /> 117-Elevenl7-11 Stores1141171Reports114117 SCM and Additional Assessment doc Page 1 <br />