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YHS Soccer Field Conversion and Tennis Courts Reconstruction Draft Technical Memorandum 10.24.2022Draft Technical Memorandum 500 Columbia St NW, Ste 110 • Olympia, WA 98501 • 360.791.3178 TO: FROM: DATE: RE: Robert Droll, President, RWD Landscape Architects Chad McMullen, PE, and Lance Levine, PE October 24, 2022 Summary of Geotechnical Engineering Services Yelm High School Soccer Field Conversion and Tennis Courts Reconstruction Yelm, Washington RWD Project No. 22041 Landau Project No. 1444018.010.011 Introduction This memorandum summarizes the results of geotechnical engineering services provided by Landau Associates, Inc. (Landau) in support of the Yelm High School Soccer Field Conversion and Tennis Courts Reconstruction project, located at 1315 West Yelm Avenue in Yelm, Washington (site; Figure 1). Services were provided in accordance with the scope outlined in Landau’s proposal, dated September 27, 2022. This memorandum has been prepared with information provided by RWD Landscape Architects (RWD, project landscape architect) and Yelm Community Schools (YCS, project owner) and with data collected during Landau’s geotechnical field exploration and laboratory testing programs. Project Understanding YCS proposes to resurface a grass-covered soccer field and rebuild six tennis courts in the northwest corner of the site. The soccer field will be resurfaced with synthetic turf. RWD retained Landau to complete a limited field investigation and develop infiltration recommendations for onsite stormwater infiltration. Site Conditions The total area of the existing soccer field and tennis courts measures approximately 370 feet (ft) by 400 ft. An asphalt-paved walkway wraps around the perimeter of the soccer field. The field and courts are generally flat and level. Topography to the west of the site slopes gently downward; a privately developed parcel east of the site is elevated 1 to 2 ft above the existing soccer field. Terrain to the north and south is flat and level. Relevant site features are shown on Figure 2. Geologic Setting Geologic information for the site and the surrounding area was obtained from the Washington Geologic Information Portal (DNR, accessed October 13, 2022). Surficial deposits at the site are mapped as Fraser- age continental glacial outwash gravels (Qgog), a unit that consists of predominantly sandy gravels and gravelly sand with cobbles and boulders. This material was deposited during the last glacial recession and has not been glacially overridden. DRAFT Landau Associates Summary of Geotechnical Engineering Services Soccer Field Conversion and Tennis Courts Reconstruction 2 October 24, 2022 A layer of topsoil was observed in Landau’s October 2022 explorations. The topsoil consisted of silty sand and compost overlying glacial soils; YCS staff stated that the topsoil was placed to help establish grass turf. Other soil conditions encountered in Landau’s explorations were consistent with the mapped geology for the site. Subsurface Explorations On October 5, 2022, YCS excavated four test pits (TP-1 through TP-4) 8.0 to 9.0 ft below ground surface (bgs). The approximate locations of the explorations are shown on Figure 2. Landau personnel coordinated and monitored the field explorations, collected representative soil samples, and maintained detailed logs of the subsurface soil and groundwater conditions observed. Subsurface conditions were described using the soil classification system shown on Figure 3, in general accordance with ASTM International (ASTM) standard D2488, Standard Practice for Description and Identification of Soils (Visual-Manual Procedures). Summary logs of the explorations are presented on Figures 4 through 7. Soil samples were transported to Landau’s geotechnical laboratory for further examination and testing. Natural moisture content determinations were performed on select soil samples in accordance with ASTM standard test method D2216, Standard Test Methods for Laboratory Determination of Water (Moisture) Content of Soil and Rock by Mass. The natural moisture content is shown as “W = xx” (i.e., percentage of dry weight) in the “Test Data” column on Figures 4 through 7. Grain size analyses were performed on select soil samples in accordance with ASTM standard test method D6913, Standard Test Methods for Particle-Size Distribution (Gradation) of Soils Using Sieve Analysis. Samples selected for grain size analysis are designated with a “GS” in the “Test Data” column on Figures 4 through 7. Results of the grain size analyses are presented on Figure 8. Soil Conditions The soils observed in Landau’s October 2022 explorations were categorized into two units: • Topsoil: Topsoil was observed in all four test pits and consisted of grass turf over fine to medium sand with silt. The silty sand was mixed with compost to promote turf growth. The topsoil was in a loose, damp condition and extended 0.5 ft bgs. • Recessional Outwash: Recessional outwash was observed beneath the topsoil in all four test pits and consisted of sandy gravel with cobbles, of gravelly sand with cobbles, of gravelly sand with silt, and of fine to medium sand. Occasional boulders were observed in test pit TP-1. These variable soil gradations are typical of a sediment-choked, high-energy, braided river channel downstream of a receding glacier. The recessional outwash extended to the maximum depth explored. Groundwater Conditions Groundwater was not observed in Landau's October 2022 explorations, though soils were generally damp during test pit excavation. No seeps or pockets of moist or wet soil were observed. Mottling or other indicators of a seasonal high groundwater table were not observed. DRAFT Landau Associates Summary of Geotechnical Engineering Services Soccer Field Conversion and Tennis Courts Reconstruction 3 October 24, 2022 The groundwater conditions reported herein are for the specific date and locations indicated and may not be representative of other locations and/or times. Groundwater conditions will vary depending on local subsurface conditions, weather conditions, and other factors. Groundwater levels are expected to fluctuate seasonally, with maximum groundwater levels occurring during late winter and early spring. Conclusions and Recommendations Based on the subsurface conditions observed in Landau’s explorations, site soils are suitable for stormwater infiltration. Infiltration Rate Assessment The site is underlain by soils that will allow for moderate to rapid infiltration. Groundwater was not observed within the depths explored, and it is unlikely that infiltrated stormwater would mound above the groundwater table. Design infiltration rates were estimated using the results of Landau’s geotechnical laboratory tests (Figure 8) and the soil grain size method in the Washington State Department of Ecology’s 2019 Stormwater Management Manual for Western Washington (hereafter, 2019 SWMMWW). Correction factors were applied to account for site variability and the number of locations tested (CFv = 0.5), the test method (CFt = 0.4), and biofouling and siltation effects (CFm = 0.9). Landau used the simplified method to calculate design infiltration rates of 2.9 to 20 inches per hour, as shown in Table 1. (The 2019 SWMMWW limits infiltration rates to 20 inches per hour.) Table 1. Design Factored Infiltration Rates Exploration Designation Depth Range (ft bgs) Design Infiltration Rate (in/hr) TP-1 0.5–4.5 6.8 4.5–8 20(a) TP-2 0.5–1.5 6.8 1.5–8 20(a) TP-3 0.5–8 2.9 TP-4 0.5–1.5 2.9 1.5–5 15 5–8 20(a) (a) Maximum rate of 20 inches per hour. bgs = below ground surface ft = foot/feet in/hr = inches per hour DRAFT Landau Associates Summary of Geotechnical Engineering Services Soccer Field Conversion and Tennis Courts Reconstruction 4 October 24, 2022 Use of This Technical Memorandum Landau Associates has prepared this technical memorandum for the exclusive use of RWD Landscape Architects and Yelm Community Schools for specific application to the Yelm High School Soccer Field Conversion and Tennis Courts Reconstruction project in Yelm, Washington. No other party is entitled to rely on the information, conclusions, and recommendations included in this document without the express written consent of Landau Associates. Reuse of the information, conclusions, and recommendations provided herein for extensions of the project or for any other project, without review and authorization by Landau Associates, shall be at the user’s sole risk. Landau Associates warrants that, within the limitations of scope, schedule, and budget, its services have been provided in a manner consistent with that level of skill and care ordinarily exercised by members of the profession currently practicing in the same locality, under similar conditions as this project. Landau Associates makes no other warranty, either express or implied. Closing We trust that this memorandum provides you with the information needed to proceed with the project. If you have questions or comments, please contact Lance Levine at 360.628.5109 or at llevine@landauinc.com. LANDAU ASSOCIATES, INC. Chad McMullen, PE Senior Engineer Lance Levine, PE Senior Engineer CTM/LGL/SRW/mcs [\\OLYMPIA1\PROJECTS\1444\018.010\R\YHS SOCCER FIELD CONVERSION AND TENNIS COURTS RECONSTRUCTION DRAFT TECHNICAL MEMORANDUM 10.24.2022.DOCX] Attachments: Figure 1. Vicinity Map Figure 2. Site Exploration and Location Plan Figure 3. Soil Classification System and Key Figures 4–7. Logs of Test Pits TP-1 through TP-4 Figure 8. Grain Size Distribution DRAFT Landau Associates Summary of Geotechnical Engineering Services Soccer Field Conversion and Tennis Courts Reconstruction 5 October 24, 2022 References ASTM. 2017. Annual Book of ASTM Standards. In: Soil and Rock (I). West Conshohocken, PA: ASTM International. DNR. Washington Geologic Information Portal. Washington State Department of Natural Resources. Accessed October 13, 2022. Available online at: https://geologyportal.dnr.wa.gov/. Ecology. 2019. Stormwater Management Manual for Western Washington. Publication No. 19-10-021. Washington State Department of Ecology. July. Data Source: Esri. Yelm High School Soccer Field Conversion and Tennis Courts Reconstruction Yelm, Washington Vicinity Map Figure 1 0 0.5 1 Miles G:\Projects\1444\018\010\011\YelmHSSoccerField\YelmHSSoccerField.aprx 10/15/2022!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! ! !!! ! ! !! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !!! ! ! ! !!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! ! !!!!!!! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! ! !! ! !!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! ! !!!!!!!!!!!! ! ! ! ! ! ! ! !! ! ! ! ! ! !! ! ! ! ! ! ! ! ! ! ! ! !! ! ! ! !! ! !!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!! ! !!! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !!!!!!!!!!!!!!!!!! !!!!!!! ! ! ! !!!!!!!!!!!!!!!!!! ! ! ! ! ! ! ! ! ! ! !!!!!!! ! ! ! ! ! !!!!!!!!! !!!!!!!! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !! ! !!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! ! !!!!!!!!!!!!!!! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! !!!!!!!!!!!!!!! ! ! ! ! ! !!!!!!!!!!!!! Bradshaw Rd SE LoisPl SES W M ck e nzi e Ave W e st R d S E OrdwayDr SE Cu llens RdSEVancilRdSEGeorge Rd SE 105th Way SE Co ates R d S E Mo s m a n A v e SW Crystal Springs St NWBurnett Rd SEMudR u n R d S E 3rd St NEMillRdSE93rd Ave SE Killion Rd SE109th Ave SEAnderson L n SE 104th Ave S E 2ndStSECanal R dSE 5 6 th Q uar ter Ma st er R d 89th Ave SE Clark Rd SESE 4thStMountainView RdSERhoton Rd SECull enRd S E Railway Rd S E1st St N Berry Valley Rd S E JoyceCt S E Fox H i l l R d SE 94th Ave SE Longmire St S E 1 66thB riga d e R d Rathbun Rd SEMcnieceDr SE86th Ln SE88th Ave SE 6 0thSig n alBattalionRd510 510 507 507 Yelm ! ! ! ! ! Everett Olympia Seattle Spokane Project Location !Project Location DRAFT Source: Google Maps 2022 Legend 0 120 240 Scale in Feet Note 1. Black and white reproduction of this color original may reduce its effectiveness and lead to incorrect interpretation. Landau Associates | Y:\CAD\1444\018.010\1444018.010.dwg | 10/12/2022 9:50 AM | caduser Yelm High School Soccer Field Conversion and Tennis Courts Reconstruction Yelm, Washington Site Exploration and Location Plan Figure 2 Approximate Test Pit Location and DesignationTP-1 TP-1 TP-2 TP-3 TP-4 93RD AVENUE SOUTHEAST DRAFT 3 Yelm High School Soccer FieldConversion and TennisCourts ReconstructionYelm, WashingtonCOARSE-GRAINED SOIL(More than 50% of coarse fraction retained on No. 4 sieve)(More than 50% of material islarger than No. 200 sieve size)SAND WITH FINES (Appreciable amount of fines) HIGHLY ORGANIC SOIL (Liquid limit greater than 50) SILT AND CLAY RK DB Rock (See Rock Classification) (Liquid limit less than 50) SILT AND CLAY Wood, lumber, wood chips GRAPHIC SYMBOL Construction debris, garbage PAVEMENT ROCK WOOD DEBRIS OTHER MATERIALS TYPICAL DESCRIPTIONS LETTER SYMBOL WD > 30% and < > 15% and < > 5% and < < > _ _ _ _ Primary Constituent: Secondary Constituents: Additional Constituents: 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: 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. 50% - "GRAVEL," "SAND," "SILT," "CLAY," etc. 50% - "very gravelly," "very sandy," "very silty," etc. 30% - "gravelly," "sandy," "silty," etc. 15% - "with gravel," "with sand," "with silt," etc. 5% - "with trace gravel," "with trace sand," "with trace silt," etc., or not noted. SAMPLER TYPE & METHOD Recovery Depth Interval Sampler Graphic (variable) Code Description a b c d e f g h i 1 2 3 4 5 6 3.25-in OD, 2.42-in ID Split Spoon 2.00-in OD, 1.50-in ID Split Spoon Shelby Tube Grab Sample Single-Tube Core Barrel Double-Tube Core Barrel 2.50-in OD, 2.00-in ID WSDOT 3.00-in OD, 2.37-in ID Mod. Calif. Other - See text if applicable 300-lb Hammer, 30-inch Drop 140-lb Hammer, 30-inch Drop Pushed Sample Vibrocore (Rotosonic/Geoprobe) Other - See text if applicable Piston Extraction 1 Graphic Approximate water level at time after drilling/excavation/well AC or PC CLEAN SAND FINE-GRAINED SOILPT OH CH Well-graded gravel; gravel/sand mixture(s); little or no fines MH OL CL ML SC Field and Lab Test Data Soil Classification System SM SP(Little or no fines)(More than 50% of material is smaller than No. 200 sieve size)Silty gravel; gravel/sand/silt mixture(s) Silty sand; sand/silt mixture(s) Clayey sand; sand/clay mixture(s) Inorganic silt and very fine sand; rock flour; silty or clayey finesand or clayey silt with slight plasticity Inorganic clay of low to medium plasticity; gravelly clay; sandyclay; silty clay; lean clay Organic silt; organic, silty clay of low plasticity Inorganic silt; micaceous or diatomaceous fine sand Inorganic clay of high plasticity; fat clay Organic clay of medium to high plasticity; organic silt MAJOR DIVISIONS Pocket Penetrometer, tsf Torvane, tsf Photoionization Detector VOC screening, ppm Moisture Content, % Dry Density, pcf Material smaller than No. 200 sieve, % Grain Size - See separate figure for data Atterberg Limits - See separate figure for data Other Geotechnical Testing Chemical Analysis PP = 1.0 TV = 0.5 PID = 100 W = 10 D = 120 -200 = 60 GS AL GT CA Groundwater Code SW GC SAMPLE NUMBER & INTERVAL TYPICAL DESCRIPTIONS (2)(3) Asphalt concrete pavement or Portland cement pavement USCS LETTER SYMBOL(1) Approximate water level at time of drilling (ATD) Clayey gravel; gravel/sand/clay mixture(s) GRAPHIC SYMBOL Drilling and Sampling Key Description GM GP GW Poorly graded gravel; gravel/sand mixture(s); little or no fines Well-graded sand; gravelly sand; little or no fines Poorly graded sand; gravelly sand; little or no fines Peat; humus; swamp soil with high organic content CLEAN GRAVELGRAVEL AND GRAVELLY SOIL Sample Depth Interval Portion of Sample Retained for Archive or Analysis Sample Identification Number (Appreciable amount of fines) GRAVEL WITH FINES (Little or no fines) (More than 50% of coarse fraction passed through No. 4 sieve) SAND AND SANDY SOIL Soil Classification System and Key Figure DRAFTPoint located atTest Pit Completed 10/05/22 Total Depth of Test Pit = 8.0 ft. S-1 S-2 d d SP- SM SP GP W = 14 GS 2 inches of grass turf above 4 inches of fine to medium SAND with silt (loose, damp) (TOPSOIL) Dark brown, cobbly, very gravelly, fine to coarse SAND with trace organics (medium dense, damp) (RECESSIONAL OUTWASH) -- occasional small, rounded boulders measuring up to 16 inches Light brown, sandy, fine to coarse GRAVEL with cobbles and boulders (medium dense to dense, damp) -- soil caving; excavation terminated at 8.0 feet 0 2 4 6 8 10 12 Ground Elevation (ft): Excavation Method: CTMLogged By: Rubber-tired Backhoe Not Measured Excavated By:Yelm Community Schools Groundwater Not Encountered GROUNDWATER Elevation (ft)Notes:1. Stratigraphic contacts are based on field interpretations and are approximate. 2. Reference to the text of this report is necessary for a proper understanding of subsurface conditions. 3. Refer to "Soil Classification System and Key" figure for explanation of graphics and symbols. TP-1 Sample Number& IntervalSampler TypeTest DataGraphic SymbolUSCS SymbolSAMPLE DATA SOIL PROFILE Depth (ft)Yelm High School Soccer FieldConversion and TennisCourts ReconstructionYelm, Washington Figure1444018.01 10/21/22 \\OLYMPIA1\PROJECTS\1444\018.010\T\1444018.010.GPJ SINGLE TEST PIT LOG4Log of Test Pit TP-1 DRAFTPoint located atTest Pit Completed 10/05/22 Total Depth of Test Pit = 8.0 ft. S-1 S-2 d d SP- SM SP GP W = 6 GS 2 inches of grass turf above 4 inches of fine to medium SAND with silt (loose, damp) (TOPSOIL) Dark brown, cobbly, very gravelly, fine to coarse SAND with trace organics (medium dense, damp) (RECESSIONAL OUTWASH) Light brown, sandy, fine to coarse GRAVEL with cobbles (medium dense to dense, damp) -- soil raveling and caving; excavation terminated at 8.0 feet 0 2 4 6 8 10 12 Ground Elevation (ft): Excavation Method: CTMLogged By: Rubber-tired Backhoe Not Measured Excavated By:Yelm Community Schools Groundwater Not Encountered GROUNDWATER Elevation (ft)Notes:1. Stratigraphic contacts are based on field interpretations and are approximate. 2. Reference to the text of this report is necessary for a proper understanding of subsurface conditions. 3. Refer to "Soil Classification System and Key" figure for explanation of graphics and symbols. TP-2 Sample Number& IntervalSampler TypeTest DataGraphic SymbolUSCS SymbolSAMPLE DATA SOIL PROFILE Depth (ft)Yelm High School Soccer FieldConversion and TennisCourts ReconstructionYelm, Washington Figure1444018.01 10/21/22 \\OLYMPIA1\PROJECTS\1444\018.010\T\1444018.010.GPJ SINGLE TEST PIT LOG5Log of Test Pit TP-2 DRAFTPoint located atTest Pit Completed 10/05/22 Total Depth of Test Pit = 9.0 ft. S-1 S-2 d d SP- SM GP- GM SW- SM GP W = 16 GS 2 inches of grass turf above 4 inches of fine to medium SAND with silt (loose, damp) (TOPSOIL) Dark brown, sandy, fine to coarse GRAVEL with silt, cobbles, and trace organics (medium dense, damp) (RECESSIONAL OUTWASH) Light brown, gravelly, fine to coarse SAND with silt (loose to medium dense, damp) -- grades to with cobbles Light brown, cobbly, sandy, fine to coarse GRAVEL (medium dense to dense, damp) 0 2 4 6 8 10 12 Ground Elevation (ft): Excavation Method: CTMLogged By: Rubber-tired Backhoe Not Measured Excavated By:Yelm Community Schools Groundwater Not Encountered GROUNDWATER Elevation (ft)Notes:1. Stratigraphic contacts are based on field interpretations and are approximate. 2. Reference to the text of this report is necessary for a proper understanding of subsurface conditions. 3. Refer to "Soil Classification System and Key" figure for explanation of graphics and symbols. TP-3 Sample Number& IntervalSampler TypeTest DataGraphic SymbolUSCS SymbolSAMPLE DATA SOIL PROFILE Depth (ft)Yelm High School Soccer FieldConversion and TennisCourts ReconstructionYelm, Washington Figure1444018.01 10/21/22 \\OLYMPIA1\PROJECTS\1444\018.010\T\1444018.010.GPJ SINGLE TEST PIT LOG6Log of Test Pit TP-3 DRAFTPoint located atTest Pit Completed 10/05/22 Total Depth of Test Pit = 8.0 ft. S-1 S-2 d d SP- SM GP- GM SP GP W = 8 GS 2 inches of grass turf above 4 inches of fine to medium SAND with silt (loose, damp) (TOPSOIL) Dark brown, sandy, fine to coarse GRAVEL with silt and trace organics (medium dense, damp) (RECESSIONAL OUTWASH) Light brown, fine to medium SAND (loose to medium dense, damp) -- grades to very gravelly, with cobbles, and dense Light brown, sandy, fine to coarse GRAVEL (dense, damp) 0 2 4 6 8 10 12 Ground Elevation (ft): Excavation Method: CTMLogged By: Rubber-tired Backhoe Not Measured Excavated By:Yelm Community Schools Groundwater Not Encountered GROUNDWATER Elevation (ft)Notes:1. Stratigraphic contacts are based on field interpretations and are approximate. 2. Reference to the text of this report is necessary for a proper understanding of subsurface conditions. 3. Refer to "Soil Classification System and Key" figure for explanation of graphics and symbols. TP-4 Sample Number& IntervalSampler TypeTest DataGraphic SymbolUSCS SymbolSAMPLE DATA SOIL PROFILE Depth (ft)Yelm High School Soccer FieldConversion and TennisCourts ReconstructionYelm, Washington Figure1444018.01 10/21/22 \\OLYMPIA1\PROJECTS\1444\018.010\T\1444018.010.GPJ SINGLE TEST PIT LOG7Log of Test Pit TP-4 DRAFT0 10 20 30 40 50 60 70 80 90 100 0.0010.010.1110100 6 Soil Description 60126 1001.5 163 Fine U.S. Sieve Numbers 3/8 140 200 Depth (ft) Natural Moisture (%)Symbol U.S. Sieve Opening in Inches 14 Silt or ClayGravel Unified Soil Classification Grain Size in MillimetersPercent Finer by Weight4 10 303/4 3 20 Sand Hydrometer MediumCoarseCobbles 4 Exploration Number 408 Sample Number Coarse 1/2 50 Fine SP GP SW-SM SP S-1 S-2 S-1 S-1 Very gravelly, fine to coarse SAND Sandy, fine to coarse GRAVEL Gravelly, well-graded SAND with silt Fine to medium SAND 14 6 16 8 1.5 3.0 3.0 2.0 TP-1 TP-2 TP-3 TP-4 Yelm High School Soccer FieldConversion and TennisCourts ReconstructionYelm, Washington Figure 1444018.01 10/12/22 \\OLYMPIA1\PROJECTS\1444\018.010\T\1444018.010.GPJ GRAIN SIZE FIGURE 8Grain Size Distribution