15 <br />14 <br />13 <br />12 <br />11 <br />10 <br />9 <br />8 <br />7 <br />6 <br />5 <br />4 <br />3 <br />2 <br />1 <br />0 <br />Plasticity Index (PI) = 40, <br />Expansion Index (EI) = 122 <br />(High Expansive Potential). <br />Initial Saturation = 51%. <br />Molding Moisture content of <br />Sample = 16.5%. Dry <br />Density = 90 pcf. <br />36206086 <br />TOPSOIL - moist, dark brown, small roots. <br />FAT CLAY (CH)- brown, moist, stiff. <br />WEATHERED SILTSTONE - yellow-brown, moist, <br />moderately weathered, hard.GRAB 1Easy <br />Mod. <br />Mod. <br />Hard <br />1.5 <br />>4.5 <br />Logged By: Greg Thibeaux, P.E. <br />Date Excavated: 3/20/2026 <br />Location of Test Pit: Lat. 44.030160°, Long. -123.055390° <br />Site Address: Map Lot 18-03-04-42-2300 <br />Client: DevNW <br />Project: Floral Hill Drive Residential Development <br />Sheet 1 of 1 <br />Appendix A: Test Pit TP-2 <br />SampleNumberDepth (ft)Water LevelLithologicSymbolLithology <br />Geologic Description of <br />Soil and Rock Strata <br />Sampling Data <br />% Passing #200 SieveLiquidLimitPlasticLimitMoistureContent (%)Remarks <br />Digging EffortPocket Pen. (tsf)