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LOG : BOREHOLE
<br /> 850-DIU1,_11
<br /> Geologic Logging - J. Copland, SAIC, Pleasanton, CA Ground Water Water not was encountered.
<br /> Borehole Location Approximately 11 Peet south oP tank Sampling Methods : 2- inch I . D. split-barrel sampler advanced by
<br /> excavation U850-D1U1, Building 850 Area, Site 300 a 190-pound weight Pa I l i ng 30 inches.
<br /> Coordinates (Cal Grid) - N - 126, 298 . 1; E - 1, 695, 760 . 9 Arrows show locations oP. sampling .
<br /> Elevation ground) 1333 . 89 Peet Analytical Notes Benzene, ethylbenzene, toluene, and xylenes
<br /> Drilling - P. Baker, P . C. Exploration, Inc . , Roseville, CA were not identiPied in soil or rock samples Prom 10, 201,
<br /> Date Dr i I l ed: 9/27/90 and 25 Peet above a detection limit oP 0. 0005 mg/kg.
<br /> Drilling Method: 6. 25- inch hollow stem auger, 0-91 Peet Recovery histograms show percent recover and inferred recover locations .
<br /> 9 p Y Y
<br /> Backfilled with grout, 3-11 Peet; bentonite, 0. 5-3 Peet Estimates oP gravels, sands, and Pines are P i e I d visual estimates.
<br /> TPH SITE
<br /> % Core as Analytical soil samples
<br /> Depth recovery OVA diesel ; 300
<br /> 0 0 100 Blows (ppm) (mg/kg) VL i tho I ogy L i tho 1 og i s descr s pt i ons and/or remarks
<br /> —— (0-0.5) GRAVEL IGPI baserock Por road; Pill
<br /> (0.5-20.5) QUATERNARY COLLUVIAL_ SEDIMENTS
<br /> 5 6/11/18 0 <2 ®• — (0.5-3) CLAYEY SILT, [MLI, brown, dry, medium stiPP, moderate estimated
<br /> ® :® permeability
<br /> ® (3-13) SILTY SAND, ISM] brown, dry, medium dense, Pine grained, low to
<br /> 10 � i 13 0 <10 ® :® moderate estimated permeability; easy drilling
<br /> —• slightly damp below 10 Peet
<br /> ' 15 6/7/2 0 <2 (13-20.5) SAND, [SWI, brown, damp, loose, Pine to medium grained; easy
<br /> drilling
<br /> 20 W 19/50=1" 0 <10 (20.5-11) TERTIARY SEDIMENTARY ROCKS
<br /> z (20.5-23) SILTSTONE,
<br /> 25 brown, with brown, Pine to coarse grained sandstone
<br /> 1 interbeds; hard dri
<br /> 50/50=1.25" 0 <2 lling
<br /> (23-91) SANDSTONE brown, damp, well indurated, Pine grained, well
<br /> sorted, some black laminations, quartz-rich, minor red grains, minor
<br /> maPic rains
<br /> 30 W 23/50=1" 0 <2 grains
<br /> gray below 30 Peet
<br /> 35 W 28/60-2" 0 <2 ' ? siltstone interbed at 35-35.3 Peet; dark brown, moderately indurated,
<br /> medium to coarse rained, and moderately sorted below 35.3 Peet
<br /> gray, well indura ed, Pine to coarse grained, and minor Mn-oxide
<br /> 9 12/50 0 <2 staining below 10 Peet
<br /> D-1
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