600 RIVERSIDE RD Geotech Report 2022-10-25

Soil Classification System uscS MAJOR GRAPHIC LETTER DIVISIONS SYMBOL SYMBOLt'I TYPICAL DESCRIPTIONS (2)t3) GRAVEL AND CLEAN GRAVEL o °io `O `a GW Well -graded gravel; gravel/sand mixture(s); little or no fines GRAVELLY SOIL (Lime or no fines) Poorly graded gravel; gravel/sand mixture(s); little or no fines o. o.'o a .o: GP .= fn d 0 5 u (More than 50% of Silty gravel; gravel/sand/silt mixture(s) GRAVEL WITH FINES GM ZE -F. coarse fraction retained (Appreciable amount of 0 0 on No. 4 sieve) fines) GC Clayey gravel; gravel/sand/clay mixture(s) 0 � zCQ ° SAND AND CLEAN SAND SW Well -graded sand; gravelly sand; little or no fines w m @ SANDY SOIL (Little or no fines) Poorly graded sand; gravelly sand; little or no fines SP af i SAND WITH FINES SM < g o 00 2 (More than 50%Of Silty sand; sand/siR mixture(s) coarse fraction passed through No. 4 sieve) (Appreciable amount of fines) Clayey sand; sand/day mixture(s) SC NIL Inorganic silt and very fine sand; rods flour; silty or clayey fine O t SILT AND CLAY sand or clayey sift with slight plasticity CL o - N Inorganic clay of low to medium plasticity; gravelly day; sandy (Liquid limit less than 50) clay; silty day, lean clay CIL Z=Ea>i Organic silt; organic, silty day of low plasticity -aN MH Inorganic silt; micaceous or diatomaceous fine sand o C7 `o'= SILT AND CLAY uj m Z CH Inorganic clay of high plasticity; fat day Z E LL (Liquid limit greater than 50) Organic day of medium to high plasticity; organic silt OH HIGHLY ORGANIC SOIL PT Peat; humus; swamp soil with high organic content GRAPHIC LETTER OTHER MATERIALS SYMBOL SYMBOL TYPICAL DESCRIPTIONS PAVEMENT . AC or PC Asphalt concrete pavement or Portland cement pavement ROCK RK Rock (See Rock Classification) WOOD WD Wood, lumber, wood chips DEBRIS O O O DB Construction debris, garbage Notes: 1. USCS letter symbols correspond to symbols used by the Unified Soil Classification System and ASTM classification methods. Dual letter symbols (e.g., SP-SM for sand or gravel) indicate soil with an estimated 5-15% fines. Multiple letter symbols (e.g., ML/CL) indicate borderline or multiple soil classifications. 2. Soil descriptions are based on the general approach presented in the Standard Practice for Description and Identification of Soils (Visual -Manual Procedure), outlined in ASTM D 2488. Where laboratory index testing has been conducted, soil classifications are based on the Standard Test Method for Classification of Soils for Engineering Purposes, as outlined in ASTM D 2487. 3. Soil description terminology is based on visual estimates (in the absence of laboratory test data) of the percentages of each soil type and is defined as follows: Primary Constituent: > 50% - "GRAVEL," "SAND," "SILT," "CLAY," etc. Secondary Constituents: > 30% and < 50% - "very gravelly," 'very sandy," "very silty," etc. > 15% and < 30% - "gravelly," "sandy," "silty," etc. Additional Constituents: > 5% and < 15% - "with gravel," "with sand," "with silt," etc. < 5% - "with trace gravel," "with trace sand," "with trace silt," etc., or not noted. 4. Soil density or consistency descriptions are based on judgement using a combination of sampler penetration blow counts, drilling or excavating conditions, field tests, and laboratory tests, as appropriate. Drilling and Sampling Key Field and Lab Test Data SAMPLER TYPE SAMPLE NUMBER & INTERVAL Code Description Code Description a 3.25-inch O.D., 2.42-inch I.D. Split Spoon PP = 1.0 Pocket Penetrometer, tsf b 2.00-inch O.D., 1.50-inch I.D. Split Spoon Sample Identification Number TV = 0.5 Torvane, tsf c Shelby Tube PID = 100 Photoionization Detector VOC screening, ppm d Grab Sample Recovery Depth Interval W = 10 Moisture Content, % e Single -Tube Core Barrel 1 Sample Depth Interval D = 120 Dry Density, pcf f Double -Tube Core Barrel -200 = 60 Material smaller than No. 200 sieve, % g 2.50-inch O.D., 2.00-inch I.D. WSDOT Portion of Sample Retained GS Grain Size - See separate figure for data h 3.00-inch O.D., 2.375-inch I.D. Mod. California for Archive or Analysis AL Atterberg Limits - See separate figure for data i Other - See text if applicable GT Other Geotechnical Testing 1 300-lb Hammer, 30-inch Drop CA Chemical Analysis 2 140-lb Hammer, 30-inch Drop Groundwater 3 4 Pushed Vibrocore (Rotosonic/Geoprobe) a Approximate water level at time of drilling (ATD) 5 Other - See text if applicable j 1 Approximate water level at time other than ATD LANDAU ASSOCIATES Riverside Business Park Figure Public access Project Soil Classification System and Key A _ 1 Everett, Washington f-1