4918 24TH AVE W Geotech Report 2023-06-22

Soil Classification System MAJOR GRAPHIC LETTER TYPICAL +u21 DIVISIONS SYMBOL SYMBOL DESCRIPTIONSI GRAVEL AND CLEAN GRAVEL _ .�4� GW Well-graded gravel;gravel/sand mixture(s);little or no fines •� GRAVELLY SOIL (Little or no fines) :.•v: "• . GP Poorly graded gravel;gravel/sand mixture(s);little or no fines u).°a (More than 50%of Ihlt..�.I i I' o ' GRAVEL WITH FINES NI '�!1 'l GM Silty gravel;gravel/sand/silt mixture(s) coarse fraction s."Pi' r W E'en (Appreciable amount of - �" z o retained on No.4 °o sieve) • fines) * GC Clayey gravel;gravel/sand/clay mixtures) N w c SAND AND CLEAN SAND ••••••••••••••••••••••••••• SW Well-graded sand;gravelly sand;little or no fines SANDY SOIL (Little or no fines) • ;•t' '• ••' ;Y: SP Poorly graded sand;gravelly sand;little or no fines 00 E' (More than 50%of r ' v`a-`—° coarse fraction passed SAND WITH FINES "' •.:�;: SM Silty sand;sand/silt mixture(s) through No.4 sieve) (Appreciable amount of '...•..'' ' fit, fines) ,,' SC Clayey sand;sand/clay mixture(s) _ Inorganic silt and very fine sand;rock flour;silty or clayey fine 1°o SILT AND CLAY ,, ML sand or clayey silt with slight plasticity p P CLInorganic clay of low to medium plasticity;gravelly clay;sandy ., (Liquid limit less than 50) �_ clay;silty clay;lean clay r JJ c 1 /.I- OL Organic silt;organic,silty clay of low plasticity Z o ° J '''� > °�N SILT AND CLAY u; MH Inorganic silt;micaceous or diatomaceous fine sand 7,E i Z c H (Liquid limit greater than 50) CH Inorganic clay of high plasticity;fat clay .�_ : _;; OH Organic clay of medium to high plasticity;organic silt HIGHLY ORGANIC SOIL PT Peat;humus;swamp soil with high organic content GRAPHIC LETTER OTHER MATERIALS SYMBOL SYMBOL TYPICAL DESCRIPTIONS PAVEMENT 4 C or PC Asphalt concrete pavement or Portland cement pavement ROCK •, � RK Rock(See Rock Classification) AN WOOD. w�� WD Wood,lumber,wood chips DEBRIS .•::•: :•...: DB Construction debris,garbage Notes: 1. Soil descriptions are based on the general approach presented in the Standard Practice for Desciption and Identification of Soils(Visual-Manual Procedure), as 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. 2. 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. >12%and<30%-"gravelly,""sandy,""silty,"etc. Additional Constituents: > 5%and<12%-"slightly gravelly,""slightly sandy,""slightly silty,"etc. < 5%-'trace gravel,""trace sand,""trace silt,"etc.,or not noted. Drilling and Sampling Key Field and Lab Test Data SAMPLE NUMBER&INTERVAL SAMPLER TYPE Code Description Code Description Sample Identification Number 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 TV=0.5 Torvane,tsf ,-- Recovery Depth Interval c Shelby Tube PID=100 Photoionization Detector VOC screening,ppm 1.11 Jam— Sample Depth Interval d Grab Sample W=10 Moisture Content,% J e Other-See text if applicable D=120 Dry Density,pcf Portion of Sample Retained 1 300-lb Hammer,30-inch Drop -200=60 Material smaller than No.200 sieve,% for Archive or Analysis 2 140-lb Hammer,30-inch Drop GS Grain Size-See separate figure for data 3 Pushed AL Atterberg Limits-See separate figure for data 4 Other-See text if applicable GT Other Geotechnical Testing Groundwater CA Chemical Analysis Q Approximate water elevation at time of drilling(ATD)or on date noted. Groundwater AID levels can fluctuate due to precipitation,seasonal conditions,and other factors. Proposed Short-Plat Figure CONIFT 2405 Hillside Lane Soil Classification System and Key Everett,Washington 4