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DRILLING COMPANY: Holocene Drilling DATE STARTED: 11/7/2018 <br /> DRILLING METHOD: Dietrich D-50 Turbo,HSA&Mud Rotary DATE COMPLETED: 11/8/2018 <br /> SAMPLING METHOD: SPT with Autohammer LOGGED BY: A.Ong/B.Thurber <br /> LOCATION: See Figure 2 SURFACE ELEVATION: 39.5 t feet <br /> co ce w <br /> v Standard Penetration Test <br /> W Z w <br /> v LLI <br /> nW s Q (140 lb.weight,30"drop) z <br /> J O w w o Blows per foot O <br /> (n J J Z Q <br /> N <br /> i_ 0 0) o_ d 3 w > > <br /> 0 <br /> W y >- u) Q Q W H -J aLij �i <br /> 0 U) DESCRIPTION - O 0 0 10 20 30 40 50 W <br /> 30— "Medium dense",REFUSE with blackish-brown slurry. ® S-7 3-3-12 ♦ _ <br /> - -30%mixed wood,paper,and plastic.Soft. <br /> -30%tiny wood fragments with coarse sand and broken glass - <br /> -40%decomposed sandy silt with metal <br /> About 30%wood total. - <br /> — 5 <br /> 35— "Medium dense",REFUSE.Blackish brown slurry. ® S-8 11-11-9 A _ <br /> - -40%decomposed softer wood <br /> -30%miscellaneous plastic sheeting,fibers,and glass ,- <br /> - -30%silty sandy decomposed matrix material <br /> 0 <br /> 40— "Medium dense",with blackish brown slurry,slight oil sheen. S-9 20-12-12 A _ <br /> - 100%wood in sample length recovered,1 small piece of <br /> plastic.Poor recovery. <br /> - <br /> ---5 <br /> 45— ,i, PT Medium stiff,yellow-brown to dark yellow-brown decomposed ®S-10 4-3-5 A _ <br /> - !, 0 r, wood.Possibly alluvial peat. <br /> - ���' . (ALLUVIUM) <br /> _ !, -��' No recovery.All Refuse lag in black slurry:wood,glass,and S-11 4-4-6 <br /> 0�, plastic. - <br /> - 0", - <br /> -10 <br /> 50— 0,, . No recovery.Switched to mud rotary. NR 2-3-3 A _ <br /> - SM Loose,light grayish brown,silty SAND,wet. —S-12 GS <br /> _ <br /> _ <br /> ML Medium stiff,grayish brown,sandy SILT,moist,grading to DS <br /> - - �Iuish gray SILT,moist. ,- UW • <br /> SM — -15 <br /> Medium dense,bluish gray,silty fine SAND,wet. <br /> 55— Medium dense,gray,slightly silty,fine-medium SAND,wet. S-13 10-10-10 A _ <br /> i ....•: <br /> Two lenses of fine SAND,0.5 to 1 inch thick. <br /> SP _ <br /> _ •; SM <br /> —-20 <br /> 60— • ': <br /> III 0 20 40 60 80 100 <br /> Water Content(%) <br /> Plastic Limit I •— I 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 /> 1 <br /> BORING: <br /> I MT GEOTECHNICAL ENGINEERING REPORT BH-46 <br /> RIVERFRONT BOULEVARD <br /> HWAGEOSCIENCES INC EVERETT, WASHINGTON PAGE: 2 of 3 <br /> PROJECT NO.: 2015-061 FIGURE: A-12 <br /> BORING-DSM 2015-061.GPJ 12/10/18 <br />