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i 'dAA <br /> Problem Assessment Report November 20, 1990 <br /> r Fire Engine Company No. 2, Stockton, California AGS 38009-2 <br /> TABLE 4 <br /> STJMMAMY OF SOIL BORINGS <br /> Fire Engine Company No. 2 <br /> d� 110 West Sonora Street, <br /> Stockton, California <br /> Baring Date Total Depth to PID Drilling Completion <br /> Number Drilled Depth Water Range Contractor <br /> (ft) (ft) (Ppm) <br /> B-1 12/88 55 1/2 37 0-640 Spectrum MW-1 <br /> B-2 12/88 55 1/2 37 0 Spectrum MW-2 <br /> B-3 12/88 55 1/2 37 0 Spectrum MW-3 <br /> B-4 05/90 35 1/2 NE 0 Wayne Grouted <br /> 8--5 05/90 35 1/2 NE 5-20 Wayne Groutea <br /> B-6 05/90 35 1/2 NE 0 Wayne Grouted <br /> 5-7 05/90 35 1/2 NE 0-6 Wayne Grouted <br /> B-8 05/90 55 1/2 38 1/2 0 Wayne MW-4 <br /> NE = Not encountered <br /> PPM = Parts per million <br /> Grouted = Grouted to surface with bentonite and cement slurry. <br /> Spectrum = Spectrum Exploration Inc. of Stockton, California. <br /> Wayne = Wayne Drilling Company of Lincoln, California. <br /> B-1 <br /> Boring <br /> number <br /> Boring <br /> Soil samples were collected at approximately 5-foot intervals from each boring to <br /> characterize the geology beneath the site. Sediments were logged using the Unified Soil <br /> Classification System,which is summarized in Plate P-3. Details field methods are discussed <br /> in Appendix B. The samples collected immediately above ground water in each boring and <br /> the sample collected at 25 feet below grade in boring B-1 were submitted to a State-certified <br /> laboratory for appropriate analyses. <br /> � 10 <br /> e. <br /> Ajopl ed GeoSysMMS <br />