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West & Hansen En ineers , Inc . <br /> PO Box 5891, Vacaville CA 95696 <br /> *Froject Stockton AASF Aircraft Wash ad System Job No. 6788-15 <br /> Location- Clarifier Date: October 10, 91 <br /> Boring Designation C-1 Driller: West & Hansen Engineers, Inc <br /> Logged by- BWW Base Vacaville <br /> Boring Location South of First Chamber Drill Equipment. Hand Auger <br /> Soils Classification System USCS Diameter & Type Well Casing: <br /> Sample type: DRASS TUBE - SPLIT SPOON NA <br /> Soil Matrix YES Elevation & Datum. NA <br /> Date Started Sept 13, 91 Finished Sept 13 Completion Depth: 10 feet <br /> Number of Sam les Three Depth to Groundwater Unknown <br /> Depth m P Lithology Observations Field Well <br /> {feet) Analysis -Construction <br /> 9-1 <br /> 0 Noon C-1- Dry silty loam I I <br /> 2 Petroleum odor, dis-coloration Contam I I <br /> MH Cohesive I I <br /> { I <br /> 5 ! I <br /> Continued Dis-coloration, I I <br /> odor I I <br /> MH Silty loam Contain I I <br /> 10 7 10 I I <br /> I I <br /> EO I I <br /> I I <br /> I I <br /> I I <br /> 15 I ! <br /> I I <br /> I I <br /> I I <br /> I I <br /> 20 E I <br /> I ! <br /> I f <br /> I ! <br /> 1 1 <br /> I I <br /> 25 I I <br /> I I <br /> I I <br /> I I <br /> 1 ! <br /> 30 I I <br /> I 1 <br /> I I <br /> I I <br /> I I <br /> 35 I <br /> ! I <br /> ! I <br /> ! I <br /> 1 ! <br /> I ! <br /> 40 LJ <br />