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t �-BORING LOG .� <br /> PROJECT NO: 490-STK PROJECT NAME: MV-Stockton BORING NO: B6 <br /> LOCATION: Approx. middle of SW tank pit DATE: 4-20-90 <br /> GEOLOGIST: Cinda C. MacKinnon, R.G. (#4316) Page 1 of 1 <br /> GROUND WATER DEPTH DRILLER:W. Haz Mat <br /> DRILLING METHODS: Hollow stem auger; Acker AD-2 rig <br /> 0 <br /> .n <br /> E <br /> T <br /> DESCRIPTION WELL CONSTRUCTION <br /> Lu 0c <br /> O <br /> 0 <br /> Tan-brown sandy silt with small gravel; <br /> loose; dry <br /> fill <br /> 5- <br /> 7- <br /> 7- <br /> 10- dark brown silt and clay mottled red brown; <br /> 12 some sand and concrete particles <br /> 14- <br /> 1 p 30- sample B6 (9.5-10') <br /> 19- olive brown silty clay with minor dark brown mottling; CIL <br /> 32- moist; dense. <br /> 40 <br /> 8- becomes siltier with red brown mottling and minor sand <br /> 16- <br /> 1 22 <br /> 20 <br /> REMARKS <br /> MACKINNON ENVIRONMENTAL. CONSULTING <br /> WALNUT CREEK, CA <br />