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i "DRILLING COMPANY: Holocene Drilling DATE STARTED: 11/6/2018 1 <br /> DRILLING METHOD: Dietrich D-50 Turbo,HSA&Mud Rotary DATE COMPLETED: 11/6/2018 <br /> SAMPLING METHOD: SPT with Autohammer LOGGED BY: A.Ong <br /> LOCATION: See Figure 2 SURFACE ELEVATION: 35.0 t feet <br /> w <br /> gw z^ co w Standard Penetration Test <br /> U a N L Q (140 lb.weight,30"drop) Z <br /> J O Z cn I- ♦ Blows per foot 0 <br /> w w w� Z P <br /> J -I0_ jam. <br /> w� >- CO N Q a- 0 (� w7 o U) DESCRIPTION0 10 20 30 40 50 <br /> 0 ML Soft brown mud at surface. <br /> _ .• SM _ <br /> Medium dense,dark brown to gray,SILT with fine to medium S-1A 3-7-12 A _ <br /> subangular broken gravel,moist.A block of black wood and S-1B <br /> - `. SM 1-inch layer of clean,medium to coarse SAND present at 10 5— - <br /> — 30 <br /> inches.Split into 2 samples. <br /> S-2A 4-9-13 ♦ <br /> (FILL) _ <br /> Medium dense,dark brown to dark gray,silty medium-coarse 5-26 <br /> _ SAND with fine to medium broken subangular-angular gravel, - <br /> moist.Split into 2 samples. <br /> ML <br /> I 10- SM »A 25 <br /> Very dense,dark brown,sandy SILT to silty SAND with fine to EI S-3 5-30-46 <br /> - medum subrounded to subangular and broken gravel,moist. - <br /> Driller states blowcount overstated,from striking concrete or <br /> • <br /> gravel with the sampler tip. <br /> • <br /> I <br /> 15 Medium dense,gray-brown,sandy SILT with fine subangular S-4A 6-5-6 A — 20 <br /> - gravel,moist. f X S-4B - <br /> _ Contact with REFUSE at 6 inches,soft wood at and below 10 _ <br /> 111 inches. <br /> _ At 17 feet,lower exposure limit meter went off,paused - <br /> drilling to diffuse.Strong rotten egg odor.CH4 at maximum <br /> - 36%,CO2 at maximum 4%. - <br /> 20 "Medium dense",black,REFUSE,dry.Poor to no recovery. S-5 6-6-6 A 15 <br /> Wood fragments. - <br /> - (REFUSE) - <br /> 25 "Medium dense",black-brown,REFUSE,moist.Poor ® S-6 9-9-15 - A — 10 <br /> recovery.Soft,peaty,sandy wood material with some plastic. - <br /> Block of wood and broken rock in sampler head.Water <br /> - encountered at 25ft. - <br /> -70%wood <br /> _ -25%rock _ <br /> -5%plastic <br /> 30— <br /> 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 /> 111 and therefore may not necessarily be indicative of other times and/or locations. <br /> BORING: <br /> I = GEOTECHNICAL ENGINEERING REPORT B <br /> BORING: <br /> RIVERFRONT BOULEVARD -41 <br /> HWAGEOSCIENCES INC. EVERETT, WASHINGTON PAGE: 1 of 3 <br /> PROJECT NO.: 2015-061 FIGURE: A-7 <br /> BORING-DSM 2015-061.GPJ 12/10/18 <br />