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' [Drilling <br /> roject Name: Barclays Lathrop site <br /> Date: 8/2/93 Boring Number: Cl <br /> ' roject No: 14744 Borehole Depth: 140' Surface Completion: monument <br /> rillin Co: Exploration Drilling Well De [h: 117.5' Surface Elevation: <br /> ' Equip: Failing 1500 mud rotary Water Elev.: Logged By: IED <br /> Sampler Type: 94mm wireline Casing Elevation: Checked By: CAH <br /> ' E <br /> T O <br /> to <br /> O N v <br /> o a a b' m 5S <br /> ' Description �j Q z V a p Remarks <br /> w <br /> Grades to Medium dark gray(N4)(50,0,50,0) 5%bentonite grout <br /> ' B <br /> Grades to sandy CLAY(CL)(60,0,40,0)with shell. 1 <br /> ' a <br /> Grades to Dark greenish gray(SGY 4/1) kith silt 6 <br /> (70,20,10,0) n <br /> k <br /> Grayish black(N2)clayey SAND (SC)(20,30,50,0) Q <br /> t wet, soft. <br /> 2nd water <br /> .• 70 <br /> ' Medium dark gray(N4)SAND(SP)(0,0,100,0) <br /> angular-subrounded, saturated,loose. 4"schedule 40 PVC blank <br /> ' Pale brown (SYR 5/2) silty CLAY(CL) (60,35,5,0) well casing. <br /> medium stiff,dry. <br /> ' 6" lens of medium grained saturated SAND(SP). <br /> Grades to Light olive gray(5Y 5/2)silty SAND (SM) 10 3/4 o.d.conductor casing <br /> ' (20,30,50,0) <br /> 80 <br /> ' Pale yellowish brown(lOYR 6/2)streaked with white <br /> silty CLAY(CL)(80,20,0,0) medium-very stiff,dry. <br /> 85 Bottom of conductor at 84.5' <br /> ' Dark yellowish brown(I OYR 4/2) silty CLAY/clayey <br /> SILT(CL/ML) (45,45,10,0) medium stiff, slightly <br /> moist, micaceous. <br /> 90 <br /> TRC Environmental Corporation <br /> Figure No. A-3 <br />