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I DRILLING COMPANY: Holocene Drilling DATE STARTED: 11/6/2018 <br /> DRILLING METHOD: CME 830 Tracked Rig,HSA&Mud Rotary DATE COMPLETED: 11/6/2018 <br /> SAMPLING METHOD: SPT with Autohammer LOGGED BY: B.Thurber <br /> LOCATION: See Figure 2 SURFACE ELEVATION: 39.2 t feet <br /> w <br /> v <br /> cn w Standard Penetration Test <br /> Z <br /> CDw <br /> U a t Q (140 lb.weight,30"drop) Z <br /> J O w w.� p A Blows per foot O_ <br /> W Z <br /> N <br /> J J � <br /> = o- o_ Q! w 8 II Q <br /> w� >- U) Q Q w ° � a��i <br /> o cn DESCRIPTION N CO a 0 O 0 10 20 30 40 50 w'" <br /> Log at 30 feet,1-2 feet thick.Drove into large woody debris; <br /> - blowcounts overstated. <br /> REFUSE:Plastic,fine black matter over wood(rotted),wet. - <br /> -60%rottable. <br /> I - — 5 <br /> 35— - <br /> Poor recovery.Drove wood.REFUSE:Wood,carpet,gravel, ® S-7 10-7-10 A <br /> - metal.Black slurry,no sheen. _ <br /> — 0 <br /> 40— REFUSE.Sandy GRAVEL(broken concrete)with 1 inch of ® S-8 20-12-13 A - <br /> - wood and plastic,metal.3 inches of slough. - <br /> PT <br /> Drilling lag of Refuse/wood,with plastic sheeting and wood <br /> I 45— ` ' : fragments.4 inches of stiff to medium stiff,olive gray,SILT A _ <br /> ,� 0, with fine,fibrous organics in lenses,moist. ® S-9 11-6-5 <br /> Switched to mud rotary after sampling at 45 feet. _ <br /> 0 i, : (ALLUVIUM) <br /> ML Medium stiff,olive gray,SILT with organics,moist. <br /> 28 - <br /> S-10 DS <br /> PT <br /> Soft,very dark brown,PEAT,moist. UW $ <br /> - I, .��, .-- -10 <br /> I 50— �,, 12 inch slough of dark brown organics with plastic sheeting. S-11 1-1-2 ` <br /> - - — Soft,brown oxidizing to brownish black,fibrous PEAT,moist. - <br /> - .!�, - <br /> -15 <br /> 55— SM Harder drilling below 54.5 feet. <br /> I <br /> Very dense,gray,silty,fine gravelly,fine-medium SAND, <br /> moist to wet. ®S-12 10-16-34 <br /> - - <br /> - (ADVANCE OUTWASH) - <br /> - — _ <br /> -20 <br /> 60— »A <br /> I 0 20 40 60 80 100 <br /> Water Content(%) <br /> Plastic Limit I--SI Liquid Limit <br /> NOTE: This log of subsurface conditions applies only at the specified location and on the date indicated Natural Water Content <br /> and therefore may not necessarily be indicative of other times and/or locations. <br /> I <br /> BORING: <br /> I UM GEOTECHNICAL ENGINEERING REPORT B <br /> BORING: <br /> RIVERFRONT BOULEVARD <br /> HWAGEOSCIENCES INC. EVERETT, WASHINGTON PAGE: 2 of 3 <br /> PROJECT NO.: 2015-061 FIGURE: A-10 <br /> I BORING-DSM 2015-061.GPJ 12/10/18 <br />