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West & Hansen En iLneers , Inc . <br /> PO Box 5891, Vacaville CA 95696 <br /> AftProject. Stockton AASF Aircraft Wash ad System Job No. 6788-15 <br /> Location- Wash ad Date: October 10, 91 <br /> Boring Designation 1-1 Driller: West & Hansen Engineers, Inc <br /> Logged by. BWW Base Vacaville <br /> Boring Location North Quadrant (See Figure 5) Drill Equipment. Hand Auger <br /> Soils Classification System USCS Diameter & Type Well Casing <br /> Sample type: BRASS TUBE — SPLIT SPOON NA <br /> Soil Matrix YES Elevation & Datum NA <br /> Date Started Sept 9, 1991 Finished Sept 9, 91 Completion Depth- 10 feet <br /> Number of Samples Three Depth to Groundwater. Unknown <br /> Depth 0 ` " <br /> � Lxthology Observations Field Well <br /> (feet) cep- �, Analysis Construction <br /> 9-9 <br /> 0800 <br /> 0 1— Concrete Washpad <br /> Basecourse <br /> I i <br /> 1 CL Grey dis—coloration Contam I <br /> Petroleum odor I I <br /> 9) Silty clay, cohesive 1 I <br /> Hardpan — Dense I I <br /> I I <br /> 2 SM Clean I I <br /> Dry, sandy silt I I <br /> Uncohesive I I <br /> 10 3 I I <br /> I S <br /> ! 1 <br /> I I <br /> 1 I <br /> 15 T I I <br /> I I <br /> I [ <br /> I f <br /> I ! <br /> 20 I 1 <br /> ! I <br /> i I <br /> I I <br /> I I <br /> I I <br /> 25 I I <br /> I I <br /> I I <br /> I { <br /> I I <br /> 30 I I <br /> I I <br /> I I <br /> I I <br /> I I <br /> 35 I I <br /> I I <br /> I I <br /> I I <br /> I I <br /> I I <br /> 40 LJ <br />