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d <br /> r .. TABLE OF CONTENTS <br /> j F^� <br /> F <br /> SECTION I PROJECT DESCRIPTION <br /> . . . . . , • . , . . . . • . . . . . . . . <br /> {� . 1-1 <br /> Purpose of Investigation . . . . . . . . . • . . . . . . . . . . . . . . 1-1 <br /> Sumrnary of Work. . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-I <br /> SECTION 2 SITE DESCRIPTION. . . . . . . . . . . . . . . . . . . . • . . .2-1 <br /> t _ <br /> ' Local Description. . . . . . . . . . . . . . . . . . . • 2.1 <br /> -Specific Description. . . . . . . . . . . • . . . . . •. . . . . . . . . . . . . . 2-1 <br /> 2-2 <br /> Site <br /> Site History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 <br /> Sensitive Receptor Survey . . . . . . . . . . . . . . . • . . . . . . 2-3 <br /> Previous Investigations at Nearby Sites. . . . . . . . . . . . . . . 2-4 9 <br /> fl Benjamin Holt Shell Station . . . . . . . . . . . . . . . . . • . . 2-4 <br /> Arco Station No. 2133 . . . . . . . . . . . . . . . • . . . . . .2-4 F <br /> Chevron Station No.94275 . . . . • • • . • .2_5 <br /> Regional Geology/Hydrology and Water Usage. . . . . . . . . . 2-5 <br /> io4 Geologic Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5 r <br /> Hydrologic Setting. . . . . . . . . . . . . . . . . . . . . . . . . .2-6 <br /> >. Hydrogeology . . . . . . . . . . . . . . .2-6 <br />. .: SECTION 3 SITE INVESTIGATION. . . . . . . . . . . . . . . . . . . . . . . . 3-1 <br /> W Ld. <br /> Soil Boring and Soil Sampling Procedures • • , , • • , • , • • • , 3.1 <br /> Monitoring Well Construction • . . . . . . . . . . . <br /> . • . . . . , , 3_2 <br /> Wel' Development. • 3-3 <br /> Water Level Measurements . . . . . . . . . . . . . . . . . . . • . . 3-3 <br /> Groundwater Sampling. . . . . . . . . . . . . . . . . . • . . . , . . 3-3 <br /> b Free-Product <br /> r Monitoring . . . . . • , , . . . . . . . . . . . . . . . 3-4 <br /> SECTION 4 INVESTIGATWE RESULTS . . . . . . . . . . . . . . . . . . . . .4-1 <br /> „., <br /> a � Geologic Profile. . . . . . . . . . . . . . . . . . . . . <br /> Hydrogeologic Conditions . . . . . . . . . . . a . . . . . .• . . . . .. . 4-1 <br /> , 4.1 <br /> Analytical Results • . . . 4-2 <br /> Soil Analyses . . . . . . • . . . . . . . . . . . . . . • c . • . 4-2 <br /> Groundwater Analyses . . . . . . . . . . . . . . . . . . , . . 4-2 <br /> ,Ahs SECTION 5 CONCLUSIONS AND FIGURES . . . . • • • . • , , , , , , , , . 5-1 <br /> SECTION 6 REFERENCES CITED. . . . . . . . . . . . . . . . . . . . . . . . . 6-1 <br /> ii <br /> 475-07.R5 494/91 <br />