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MONITORING WELL LOG <br />BORING <br />DRILLING METHOD <br />DATE COMPLETED <br />SYMBOLS DESCRIPTION <br />ML BROWN SANDY SILT, fine grained, trace medium grained sand <br />and subangular gravel (up to 3 mm diameter), dry some iron , <br />oxide staining, trace roots. <br />lc. ---Grades to: <br />, <br />, <br />SILTY CLAYEY SAND, fine grained, some medium grained, - <br />moist, abundant silt and clay fines, some iron oxide staining, <br />some mica. <br />CL DARK GRAY CLAY, soft, moist, medium plasticity, some black r <br />mottling, trace of silt tines. <br />CH High plasticity, greenish-gray mottling - <br />Greenish-gray, some iron oxide lined pores, trace black <br />mottling. , <br />ML GREENISH-GRAY VERY SANDY SILT, fine grained, saturated, <br />some gray clay lines, trace of mica. <br />, <br />, <br />SP DARK GRAY SAND, tine grained, 5% medium grained, saturated, <br />trace mica. <br />CL GREENISH-GRAY SILTY CLAY, medium stiff, moist, low <br />plasticity, abundant mica. <br />—NOTES: <br />1)12-INCH BORING SAMPLED AND COMPLETED <br />TO 25.5 FEET BELOW GROUND SURFACE ON <br />8/20/91. <br />2) MONITORING WELL COMPLETED ON 8/20/91. <br />31 4-INCH SCHEDULE 40 PVC BLANK CASING <br />INSTALLED TO 7.5 FEET BELOW GROUND <br />SURFACE. 4 -INCH SCHEDULE 40 PVC 0.010 <br />SLOTTED SCREEN INSTALLED 7.5 TO <br />22.5 FEET BELOW GROUND SURFACE. <br />MW-4 <br />Hollow Stern Auger <br />8/20/91 <br />35 35 1+2/12 LONESTAR SAND DEPTH IN FEET SAMPLING <br />U") <br />UJ <br />C) <br />al <br />U) <br />U- <br />0 0_ <br />CU <br />0 <br />32 <br />5 <br />2.1 <br />1.9 31 <br />8 1,5 <br />10 <br />8 1.5 <br />15 <br />8 1.5 <br />20 <br />4 1.5 <br />u 4 25 1.5 <br />30 30 <br />N <br />N <br />\ <br />-10 <br />20 <br />25 <br />5 SCREENED INTERVAL Ot DAMES & MOORE <br />12650-011-044 <br /> <br />METROPOLITAN STEVEDORE <br />Stockton, California <br />APRIL 1992 <br />Page lOf 1 <br />