(Answered): Questions:base on the Boring Log above:a. what is the USCS symbol for the soil encountered at a dept ...

Date(s) Checked By Logged By Drilled Drilling HSA Method Drill Rig CME 75 Type Groundwater Level 24 feet and Date Meas ured Drill Bit of Borehole 41.5 feet Approximate Surface Elevation 55 feet msl Hammer 140-Ib automatic trip hammer, Data Size/Type 8-inch-diame ter Drilling Contractor Sampling SPT, and Modified California Method(s) 30-inch fall Borehole Bentonite and soil cuttings Backfill Location REMARKS AND OTHER TESTS MATERIAL DESCRIPTION 55 CL Sandy CLAY, brown, moist, some roots, hard 3-inch-diameter PVC Pipe p.p 1.75 tsf S-1 2-3-4 50 Gravel Pack 5- CETTH-Silty SAND, brown, moist, medium dense 8-inch-diameter borehole S-2 4-5-6 45 10- - P-1 p.p. 1.25 tsf, LL= 37, PL 33, Pl 4, G= 0%, S 7 % , F = 93 %, 2u 21% ML SILT, grayish brown, moist, soft S-3 2-2-2 40- 15 - (15.0 ft) same as above Direct Shear R-4 6-8-15 p.p. 0.75 tsf, LL=40, PL-21 , Pl-19, El- 82 CL Lean CLAY, gray, wet, soft S-5 2-3-3 11.1 105 35 20 Sandy SILT, grayish brown, moist, stiff ML p.p. 1.25 tsf R-6 6-6-7 24.4 103 (22.5 ft) same as above, wet S-7 2-3-3 p.p. 1.25 tsf 30- 25 7-10-16 SM-ML SM (25.0 ft) same as above, transition ing to silty SAND Silty SAND, grayish brown, wet, medium dense R-8 23.2 100 #200= 50%, LL = NP, PL= NP 25- 30- SILT, gray, wet, medium stiff ML p.p. 1.5 tsf S-9 3-3-3 20- 35 R-10 3-6-10 ... (35.0 ft) same as above #200 96% 45 81.2 15- 40 4-6-8 SP-SM Poorly graded SAND with Silt, gray, wet, medium dense, fine grained Total depth 41.5 feet -Groundwater at 24 feet Borehole backfill ed with benton ite and tamped soil cuttings S-11 45- 10- 5 50- Elevation (feet) Depth (feet) Sample Type Sample Number Sampl ing Resistance, PMaterial Type Graphic Log Water Content, % Dry Unit Weight, pcf Percolation Well Log REMARKS AND OTHER TESTS MATERIAL DESCRIPTION 7 11 12 5 8 COLUMN DESCRIPTIONS 1 Elevation (feet): Elevation (MSL, feet). 2 Depth (feet): Depth in feet below the ground surface. 3 Sample Type: Type of soil sample collected at the depth interval shown 4 Sample Number: Sample id en tification number 5 Sampling Resistance, blows/ft: Number of blows to advance driven sampler one foot (or distance shown) beyond seating interval using the hammer identified on the boring log. 6 Material Type: Type of material encountered. Graphic Log: Graphic depiction of the subsurface material encountered 8 MATERIAL DESCRIPTION: Description of materi al encountered . May include consistency, moisture, color, and other descriptive text 9 Water Content, %: Water content of the soil sample, expressed as percentage of dry weight of sample. 10 Dry Unit Weight, pcf: Dry weight per unit volume of soil sample measured in laboratory, in pounds per cubic foot 11 Percolation Well Log: Graphical representation of well installed upon completion of drilling and sampling. 12 REMARKS AND OTHER TESTS: Comments and observations regarding drilling or sampling made by driller or field personnel. FIELD AND LABORATORY TEST ABBREVIATIONS CHEM: Chemical tests to ass ess corrosivity COMP: Compaction test CONS: One-dimensional consolidation test Pl: Plasticity Index, percent SA: Sieve analysis (percent passing No. 200 Sieve) UC: Unconfined compressive strength test, Qu, in ksf WA: Wash sieve (percent passing No. 200 Sieve) LL: Liquid Limit, percent MATERIAL GRAPHIC SYMBOLS Lean CLAY, CLAY w/SAND, SANDY CLAY (CL) Silty SAND (SM) Gravel Silty SAND to Sandy SILT (SM-ML) SILT, SILT w/SAND, SANDY SILT (ML) Poorly graded SAND with Silt (SP-SM) TYPICAL SAMPLER GRAPHIC SYMBOLS OTHER GRAPHIC SYMBOLS 2.5-inch-OD Modified Californ ia w/ brass liners Auger sampler Water level (at time of drilling, ATD) CME Sampler Water level (after waiting) Bulk Sample Pitcher Sample Minor change in material properties within a stratum 2-inch-OD unlined split spoon (SPT) Shelby Tube (Thin-walled, fixed head) Bulk and Ring Grab Sample Inferred/gradational contact between strata Bulk sample -7-Queried contact between strata 3-inch-OD California w/ brass rings GENERAL NOTES 1: Soil classifications are based on the Unified Soil Classification System. Descriptions and stratum lines are interpretive, and actual lith ologic changes may be gradual. Field descriptions may have been mod ified to reflect results of lab tests S N Elevation (feet) NDepth ( Sample Type Sample Number SSampling Resistance, blows/ft Material Type Graphic Log 6Water Content, % Dry Unit Weight, pcf Percolation Well Log