Laserfiche WebLink
low <br /> LOG : BOREHOLE B50- DlUI -711 <br /> Geologic Logging : J. Copland, SAIL, Pleasanton, CA <br /> Borehole Location Approximately 12 Feet southeast of Ground Water Water not was encountered. <br /> tank excavation 0850-D1U1, Building 850 Area, Site 300 Sampling Methods : 2-inch I . D . split-barrel sampler advanced by <br /> Borehole Orientation 13° From vertical ; bearing N30°E a 190-pound weight Falling 30 inches. ' <br /> Coordinates (Cal Grid) : N 926, 303 . 8)- E 1, 695, 782. 7 Arrows show locations oP sampling . <br /> Elevation (ground) : 1332 . 15 Feet Analytical Notes Benzene, ethy I benzene, toluene, and xylenes <br /> Drilling P. Baker, P . C . Exploration, Inc . , Roseville, CA were not identiFied in soil or rock samples From 29 and <br /> Date Drilled: 9/28/90 29 Feet above a detection limit oP 0 . 0005 mg/kg. <br /> Drilling Method: 6 . 25- inch hollow stem auger, 0-15 Feet Recovery histograms show percent recovery and interred recovery locations . <br /> BackFilled with grout, 5-15 Feet; bentonite, 0 . 5-5 Feet Estimates of gravels, sands, and Fines are Field visual estimates . <br /> TPH <br /> LSICore as Analytical soil samples <br /> 301 Depth recovery OVA diesel <br /> O 0 100 Blows (ppm) (mg/kg) K i tho I ogy L i tho I og i s descr i pt i ons and/or remarks <br /> _ (0-0.5) GRAVEL [GP] baserock For road; Fill <br /> ®®® (0.5-12.5) QUATERNARY COLLUVIAL SEDIMENTS <br /> 5 ®®® (0.5-12.5) CLAYEY SILT, [ML], brown, dry, medium 3t1PP, moderate estimated <br /> permeablity; lower contact From driller <br /> ®®® tan and low to moderate estimated permeability below 9 Feet <br /> 10 0 ®®® brown to tan and sligghtly damp below 11 Feet <br /> rigchatter at 12.5 Peet <br /> V 100=2° ®®®® (12.5-95) TERTIARY SEDIMENTARY ROCKS <br /> 15 I = (12.5-16.5) SILTSTONE brown well indurated Few white laminae <br /> i (16.5-26.5) SANDSTONE dark gray, Fine grained, minor red grains <br /> 20 V 100=5" 0 <br /> W 95/50=1.2" 0 <2 dark brown, dries light brown, damp, Fine to medium grained, <br /> 25 moderate) sorted and uartz-rich below 29 Feet <br /> ®=® (26.5-39.7) SILTSTONE, brown, dries light brown, well indurated, some <br /> 30 V 100=6" <2 ®®®® sand, rare Mn-oxide stains 1 <br /> =_ some manic grains below 39 Feet <br /> 35 W 28/50=5" 0 <2 ®®®= <br /> (39.7-95) SILTY SANDSTONE, dark brown, dries light brown slightly damp, <br /> _ — = moderately indurated, Pine to medium grained, quartz-rick minor red <br /> 90 V 20/50=6" 0 <2 ® ® ® grains, some lithic and manic grains, low estimated permeability ' <br /> W 25/50=6" 0 <2 <br /> D-4 <br />