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File No. NFS-4342-01 <br /> DATE DRILLED: 3/18/98 DRILLER: Exoloration Geoservices <br /> ELEVATION: DRILLING METHOD: Hollow Stem Auger <br /> BACKFILL METHOD: As Shown DIAMETER OF BORING: 8 in. <br /> LOGGED BY: S. Derrega DEPTH TO GROUNDWATER' 15 ft. <br /> z m o <br /> o m 0 <br /> y Log of Exploratory Boring No. MW-2 q 0 Water <br /> N L 6 y <br /> E <br /> m m LL 0 V .o Level cwstru-n <br /> Desai tion rn <br /> 0 <br /> FILL <br /> 1 3 inches of 3/4 inch LOOSE GRAVEL. <br /> LEAN CLAY with silt and sand,dark brown,abundant mica flakes, <br /> 2 moist,compact fill. <br /> 3 20 NA Same as above, mottled and layered. <br /> 2-1 CL <br /> 4 <br /> 5 <br /> 6 <br /> 7 <br /> g NATIVE SOIL <br /> 9 <br /> 13 NA SANDY LEAN CLAY with mica, dark brown mottled with light olive CL <br /> 10 2-2 brown,grades into SILTY SAND with silt and mica, moist, stiff. <br /> 12 <br /> 13 <br /> 14 <br /> 11 1.5 SILTY SAND with mica Interbedded with silt laminae, light olive SM <br /> 15 2-3 brown, abundant>50%mica flakes at 15 feet, moist to wet, stiff. <br /> 16 <br /> 17 <br /> 18 <br /> 19 <br /> 28 2.5 SILTY SAND with silt-minor LEAN CLAY interbeds, light olive SM <br /> 20 2-4 4.5 brown, mica flakes within, some iron oxide stain, moist, medium <br /> dense. <br /> 21 <br /> 22 <br /> 23 — — — <br /> 24 LEAN CLAY with abundant clay-minor sand, light olive brown, <br /> 2-5 27 4.5 homogenous, moist,very stiff. CL <br /> 25 <br /> Earth Systems Consultants Lathrop Effluent <br /> Percolation OF EXPLORATORY BORING NO. MW-2 <br /> NSRIorthern California Percolation Ponds <br /> Lathrop,California Figure 6 <br />