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t <br /> a TABLE OF CONTENTS <br /> SECTIONI PROJECT DESCRIPTION, , , <br /> l Purpose of Investigation . . . . . . . . . . . . . ' - _ <br /> Summary of Work. . . . . . . . . . . . . . . . . . 1-1 <br /> SECTION 2 STTE DESCRIP'T'ION. . . . . , . . . . . . . . . . . . .2-1 <br /> Local Description. . . . . . . . . . . . . . . • _ 2-1 <br /> Site-Specific Description. . . . . . . . . . . . . . . . . �. . . 2-2 <br /> Site History. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 <br /> Sensitive Receptor Survey. . . , 2-3 <br /> Previous Investigations at Nearby Sites. . 2-4 <br /> Benjamin Holt Shell Station . . . . . . . . . . . . . . . . . . . . 2-4 <br /> Arco Station No. 2133 . . . . . . . . . . . . . . . . . . . . . . . .2-4 <br /> Chevron Station No. 94275 . - 2-5 <br /> Regional Geology/Hydrology and Water Usage. .. .o .. ., , . , <br /> 2_g <br /> r:. <br /> Geologic Setting . . . . . . . . - . . . . . <br /> . . . . . . . . <br /> . . . . . 2-5 <br /> { Hydrologic Setting. . . . . . . . . . . . . . . . . . . . . . . . . . 2-6 <br /> Hydrogeology. . ,i_6 <br /> r'rn °s <br /> rF . . . . . . . . . . . . . . . . . . . . . . . . . . <br /> SECTION 3 SITE INVESTIGATION. . . . . . . . . . . . . . . . . . . . . . . . 3-1 <br /> Soil Boring and Soil Sampling Procedures. . . . . . . . . . . . . .3-1 <br /> Monitoring Well Construction . . . . . . . . . - • . . . 3-2 <br /> Well Development. . . .3-3 <br /> Water Level Measurements. . . . . . . . . . . . . . . I . . . . . 3-3 <br /> Groundwater Sampling. . . . . . . . . , . 3-3 <br /> Free-Product Monitoring . . . . . . . . . . . . . . . . . . . . . . . . 3-4 <br /> SECTION 4 INVESTIGATIVE RESULTS . . . . . . . . . . . . . . . . . . . . .4-1 <br /> Geologic Profile. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 <br /> Hydrogeolpgic Conditions . . . . . . . . . . . . . . . . . . . . . . . 4-1 <br /> Analytical Results. . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2 <br /> Soil Analyses . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2 <br /> Groundwater Analyses . . . . . . . . . . . . . . . . . . . . . .�. 4-2 <br /> SECTION 5 CONCLUSIONS AND FIGURES . . . . . . . . . . . . . . . . . . 5-1 <br /> SECTION 6 REFERENCES CITED. . . . . . . . . . . . . . . . . . . . . . . . . 6-1 <br /> ii <br /> 175.07.85 4/,14/91 <br />