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LOG OF EXPLORATORY BORING <br /> PROJECT NUMBER 20805-147.004 BORING NO. B-9/MW4 <br /> • PROJECT NAME ARCO 2186 PAGE 3 OF 4 <br /> BY M Capps DATE 10/30/97 SURFACE ELEV. 14.5 ft. <br /> FID Blow Recovery Limit LITHO- WELL <br /> Readings Counts 0. GRAPHIC DESCRIPTION DETAIL <br /> QQ� L1� COLUMN <br /> (Ppm) (blw/ft) (ft/ft) LD <br /> 0.0 69 i 1.1h.5 1.5 SELT(ML); mottled light yellowish brown (10YR, <br /> 614); and dark yellowish brown (10YR, 4/6); <br /> 100% low plasticity fines; trace fine sand; trace <br /> caliche nodules, under 1 millimeter in diameter; <br /> damp; hard; no odor. <br /> 0.0 53 1.411.5 45 Q45 ft: iron oxide mottling over 30%; damp; <br /> hard; no odor. <br /> SANDY SILT(ML); dark yellowish brown (10YR, <br /> 50 3/4); 80% low plasticity fines; 20% fine sand; <br /> 0.0 27 1.3/1.5 iron oxide mottling over 40%; moist; very stiff; <br /> no odor. <br /> 29 1.3/1.5 55 <br /> SZ <br /> 55.5 ft: wet. <br /> 60 <br /> REMARKS <br /> • Boring drilled using 10-inch-diameter, hollow-stem auger drilling equipment and sampled with a modified Califomia <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 />