N

Legend

HA-1 Approximate Hand Excavation Location by SSGC

Approximate Exploration Location by others

Scale: NTS Base map from Google Earth

South Sound Geotechnical Consulting P.O. Box 39500

Lakewood, WA 98496

(253) 973-0515

Figure 1 – Site Plan

SERA Playground

Tacoma, WA

SSGC Project #13014

B -6, Terracon

TP -1, E3RA

HA -3

HA -2

HA -1

TP -2, E3RA

TP -3, E3RA

TP -4, E3RA

Geotechnical Engineering Report SSGC SERA Playground – South Tacoma Community Center

Tacoma, Washington

SSGC Project No. 13014

March 28, 2013

Appendix A

Field Exploration Procedures and Test Hole Logs

Geotechnical Engineering Report SSGC SERA Playground – South Tacoma Community Center

Tacoma, Washington

SSGC Project No. 13014

March 28, 2013

A-1

Field Exploration Procedures

Our field exploration for this project included three (3) hand excavated holes completed on March 11,

2013. 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.

Project: SERA Playground – South Tacoma

Community Center

SSGC Job # 13014 TEST HOLe LOGS PAGE 1 OF 1

Location: Tacoma, WA Approximate Elevation: Refer to logs

EXCAVATION LOGS FIGURE 1

South Sound Geotechnical Consulting HA – 1 to HA -3 Logged by: THR

Test Hole HA-1

Depth (feet)

Material Description

0.0 – 0.75

Fill/Topsoil: Sandy SILT with some gravel and organics:

Loose, wet to saturated, dark brown.

0.75 – 3.5

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

Test Pit TP-2

Depth (feet)

Material Description

0.0 – 0.75

0.75 – 3.25

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

Test Hole HA-3

Depth (feet)

Material Description

0 – 0.5

0.5 – 0.2

2 - 3

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

Geotechnical Engineering Report SSGC SERA Playground – South Tacoma Community Center

Tacoma, Washington

SSGC Project No. 13014

March 28, 2013

Appendix B

Laboratory Testing

Geotechnical Engineering Report SSGC SERA Playground – South Tacoma Community Center

South 66th

Street, Tacoma, Washington

SSGC Project No. 13014

March 28, 2013

B-1

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.

Geotechnical Engineering Report SSGC SERA Playground – South Tacoma Community Center

Tacoma, Washington

SSGC Project No. 13014

March 28, 2013

Appendix C

Boring and Test Pit Logs by Others