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1 <br /> LOG OF EXPLORATORY BORING <br /> ' PROJECT NUMBER 20939-011.001 BORING NO. GP4 <br /> PROJECT NAME San Joaquin Co. Depart. of Public Works, Thornton, CA PAGE 1 OF 1 <br /> tBY H. Duke DATE 4/14/98 SURFACE ELEV. NM ft. <br /> RECOVERY FID N U) LITHO- WELL <br /> WtL GRAPHIC DESCRIPTION DETAILI <br /> �W (C COLUMN <br /> (ft/ft) (ppm) J N <br /> ASPHALT <br /> FILL, <br /> ' SANDY SILT(ML),dark gray (7.5Y, N41); 70% <br /> low-plasticity fines; 20% fine sand; 10% medium <br /> 1.5 sand; subangular; trace gravel; trace organics; <br /> ' damp. <br /> 25/4.0 <br /> ' S <br /> 1.0 ti' <br /> t 2 . SAND WITH SOME SILT (SP—SM),dark brown <br /> /14/98 (7.5YR, 4/3); 10% low-plasticity fines; 80% fine <br /> 3.0/4.0 sand; 10% medium sand; subangular; some mica; <br /> ' . . . . moist to wet. <br /> 10- <br /> 1.0 x . . . . <br /> As above; wet. <br /> ' 3.0/4.0 <br /> ' 1.5/2.0 1.5 <br /> BORING TERMINATED AT 14 FEET. <br /> 15 <br /> ' 20 <br /> REMARKS <br /> Boring advanced using direct-push GeoProbe equipment and sampled with a 2-inch-diameter macm-core sampler. <br /> Temporary well casing placed to collect a groundwater grab sample. Boring backfilled from bottom to 3-inches <br /> ' EOMONbelow groundwater surface with neat cement grout, and capped with asphalt. <br /> EM ON <br />