South Sound Geotechnical Consulting P.O. Box Lakewood, WA (253) Figure 1 Site Plan. SERA Playground Tacoma, WA.

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1 N TP -3, E3RA TP -4, E3RA TP -2, E3RA B -6, Terracon HA -2 HA -3 HA -1 TP -1, E3RA Legend HA-1 Approximate Hand Excavation Location by SSGC Approximate Exploration Location by others Scale: NTS South Sound Geotechnical Consulting P.O. Box Lakewood, WA (253) Base map from Google Earth Figure 1 Site Plan SERA Playground Tacoma, WA SSGC Project #13014

2 Geotechnical Engineering Report SERA Playground South Tacoma Community Center Tacoma, Washington SSGC Project No March 28, 2013 SSGC Appendix A Field Exploration Procedures and Test Hole Logs

3 Geotechnical Engineering Report SERA Playground South Tacoma Community Center Tacoma, Washington SSGC Project No March 28, 2013 SSGC Field Exploration Procedures Our field exploration for this project included three (3) hand excavated holes completed on March 11, The approximate exploration locations are shown on the Site Plan (Figure 1). The exploration locations were determined by measuring distances from existing site features by pacing. Ground surface elevations referenced on the test pit logs were inferred from available information. The location of the test holes and elevations should be considered accurate only to the degree implied by the means and methods used. SSGC personnel excavated the test holes. Soil samples were collected and stored in moisture tight containers and transported to a subcontracted soil laboratory for testing. Test holes were backfilled with excavated soils and tamped. Please note that backfill in the excavations may settle with time. The following test holes logs indicate the observed lithology of soils and other materials observed in the excavations. Where a soil contact was observed to be gradational, our log indicates the average contact depth. Our logs also indicate the approximate depths of groundwater (where observed), along with sample numbers and approximate sample depths. Classification of the soils indicated on the logs are in general accordance with the Unified Soil Classification System. A-1

4 Project: SERA Playground South Tacoma Community Center Location: Tacoma, WA SSGC Job # TEST HOLe LOGS PAGE 1 OF 1 Approximate Elevation: Refer to logs Test Hole HA-1 Depth (feet) Material Description Fill/Topsoil: Sandy SILT with some gravel and organics: Loose, wet to saturated, dark brown Fill: Silty SAND with gravel and cobbles: Medium dense, moist, gray. (Sample S-1) Test hole completed at approximately 3 feet on 3/11/13 Groundwater not observed at time of excavation, surface seepage from topsoil layer observed. Approximate surface elevation: 240 feet Depth (feet) Test Pit TP-2 Material Description Fill/Topsoil: Sandy SILT with some gravel and organics: Loose, wet, dark brown. Fill: Silty SAND with gravel and cobbles: Medium dense, moist, gray (Sample S-1) Test hole completed at approximately 3.25 feet on 3/11/13 Groundwater not observed at time of excavation, surface seepage from topsoil observed. Approximate surface elevation: 240 feet Depth (feet) Test Hole HA-3 Material Description Fill/Topsoil: Sandy SILT with some gravel and organics: Loose, wet, dark brown. (Sample S-1) Fill: Silty, gravelly SAND with cobbles: Loose to medium dense, moist, brown grading gray. Fill: Silty SAND with gravel and cobbles: Medium dense, moist, brown (Sample S-2) Test pit completed at approximately 3 feet on 3/11/13 Groundwater not observed at time of excavation. Approximate surface elevation: 240 feet EXCAVATION LOGS FIGURE 1 South Sound Geotechnical Consulting HA 1 to HA -3 Logged by: THR

5 Geotechnical Engineering Report SERA Playground South Tacoma Community Center Tacoma, Washington SSGC Project No March 28, 2013 SSGC Appendix B Laboratory Testing

6 Geotechnical Engineering Report SERA Playground South Tacoma Community Center South 66 th Street, Tacoma, Washington SSGC Project No March 28, 2013 SSGC Laboratory Testing Select soil samples were tested to measure grain size distribution. Construction Testing Laboratories of Puyallup, Washington performed the grain size distribution testing. Results of the laboratory testing are included in this appendix. B-1

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10 Geotechnical Engineering Report SERA Playground South Tacoma Community Center Tacoma, Washington SSGC Project No March 28, 2013 SSGC Appendix C Boring and Test Pit Logs by Others

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