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LOG OF EXPLORATORY BORING <br /> PROJECT NUMBER 20805-147.004 BORING NO. B-91MW-4 <br /> PROJECT NAME ARCO 2186 PAGE 1 OF 4 <br /> BY M Capps DATE 10/30/97 SURFACE ELEV. 14.5 ft. <br /> FID BLOW Recovery IU) LITHO- WELL <br /> Readings Counts yjjw �� GRAPHIC DESCRIPTION DETAIL <br /> W� COLUMN <br /> (ppnt) (blx/ft) (ft/ft) <br /> ASPHALT <br /> FILL; base rock <br /> SILT(ML); very dark grayish brown (10YR, 3/2); <br /> 100% low plasticity fines; trace fine sand; damp;17 <br /> ;. <br /> no odor. <br /> At <br /> SILT(ML); yellowish brown (10YR 516); 85% low <br /> $ plasticity fines; 5% fine sand; 10% gravel; damp; <br /> 0.0 90110" 1.011.5 no odor. <br /> Qa 5 ft. no gravel; 95% low plasticity fines;5% <br /> fine sand; iron oxide mottling over 15% of <br /> sample; damp; hard;no odor. 41. -• <br /> :# <br /> @ 8 ft: color change to dark yellowish brown <br /> (10YR, 4/4) ~t <br /> :rt <br /> 0.0 55 1.211.5 10 @ 10 ft: 100% low plasticity fines; trace fine <br /> sand; no iron oxide staining; damp; hard. <br /> :4� <br /> 0.0 28 1.2/1.5 IS @ 15 ft: 95% low plasticity fines; 5% fine sand; <br /> iron oxide mottling over 15 to 20%; damp; very <br /> stiff; no odor. <br /> 20 <br /> REMARKS <br /> Haring drilled using to-inch-diameter,hallow-seem auger drilling equipment and sampled with a modified California <br /> split-spoon sampler.Boring converted to a 4-inch diameter monitoring well.See Well Details sheet for well <br /> construction information. <br /> E ON <br />