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File No. NFS-4342-01 <br /> DATE DRILLED: 3/18/98 DRILLER: Exploration Geoservices <br /> ELEVATION: DRILLING METHOD: Hollow Stem Auoer <br /> BACKFILL METHOD: As Shown DIAMETER OF BORING: 8 in. <br /> LOGGED BY: S. Derrega DEPTH TO GROUNDWATER 15 ft. <br /> o m c o. <br /> Z Uj <br /> CL 2 <br /> y Log of Exploratory Boring No. MW-1 0 c0 Water Well . <br /> L _ <br /> M LL 0 ` — Level onstruc0on <br /> o <br /> 0 Description rn <br /> FILL <br /> 1 3 inches of 3/4-inch LOOSE GRAVEL. <br /> 2 LEAN CLAY with silt and fine sand,dark brown, minute mica flakes, <br /> moist,compact fill. <br /> 3 23 2.5 <br /> 1-1 LEAN CLAY layered with fine sand, mottled dark brown, mild CL <br /> 4 organic odor, moist,compact fill. <br /> 5 <br /> 6 <br /> 7 <br /> 6 24 4.5 SANDY LEAN CLAY with abundant organics, mottled very dark CL <br /> 1-2 gray, layered, rootlets, moist,compact fill. <br /> 9 <br /> 10 <br /> 11 <br /> NATIVE SOIL <br /> 12 TT <br /> SILTY SAND with abundant minute mica flakes, light olive brown, SM <br /> 13 21 2.5 minor oxide stain, very moist, dense. <br /> 1-3 <br /> 14 <br /> 15 <br /> 16 <br /> 17 <br /> 18 21 2.75 LEAN CLAY with sand and abundant silt,gray, moist,very stiff. <br /> 1-4 CL <br /> 19 <br /> PO SAND, poorly graded with abundant mica flakes, light olive brown, <br /> wet, medium dense. <br /> 21 <br /> 22 <br /> 23 1-5 13 NA SP <br /> 24 <br /> Grades into SILTY(FINE)SAND with minor lean clay. <br /> 25 SM <br /> Earth Systems Consultants Lathrop Effluent LOG OF EXPLORATORY BORING NO. MW-1 <br /> 40Northern CalifornFigure 4 <br /> ia Percolation Ponds <br /> Lathrop,California <br />