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Date Start/Finish: 1/6/09,1/16/09 Northing:N/A 491UBoring ID: SEI-2 -- <br /> Drilling Company: Cascade Drilling,Inc. Easting:N/A Client: Chevron Environmental Management <br /> Driller's Name: Angel Rocha Casing Elevation: N/A 9 <br /> Drilling Method: Sonic,Mud Rotary Company <br /> Sampling Method: California Split Spoon Sampler Borehole Depth: 150'bgs Location: Chevron Service Station 309075 <br /> Rig Type:Sonic Surface Elevation: N/A 3978 South Highway 99 <br /> Stockton,California <br /> Descriptions By: A.Brown/B.Gerard <br /> � a <br /> a y <br /> E06 <br /> � <br /> n <br /> Z q S w o rn c Well/Boring — <br /> = Q �' Stratigraphic Description Construction <br /> m w <br /> n o 2 5 C <br /> J r0 co N C N <br /> W <br /> p W rn rn li Q C7 <br /> s5 -5s <br /> 6 (58- N/A 0.9 Brown CLAY and SILT(CL),trace coarse Sand,wet,no odor. <br /> 60 -60 80) <br /> 65 -65- <br /> 7 (88- 1.5 0.3 Brown CLAYEY SILT(ML),trace coarse Sand,wet,slightly sweet odor,grey <br /> 70) interspersed. <br /> 70 -70 <br /> 75 -75- <br /> Portland <br /> F (78- NIA 0.2 _ Brown CLAYEY SILT(ML)with coarse Sand,dry,no odor,black particles with sand. Cement/Bentonde <br /> 80) (0.150'bgs) — <br /> 80 -80- <br /> -85 -85 <br /> c (88- 2.0 0.2 _ <br /> 90) Brown SILT(ML)with fine Sand,dry,no odor. - <br /> 90 -90 <br /> 95 -95 - <br /> 10 (98• 2.0 0.3 Brown to reddish brown poorly graded coarse SAND(SP),moist,no odor. <br /> 100) <br /> 100-200 <br /> Remarks: bgs=below ground surface;N/A=Not Applicable/Available. <br /> ARCADIS Notes: <br /> The 115 feet bgs sample was collected but not submitted due to the presence of gravel. <br /> The 130 feet bgs sample was collected but not submitted;bentonite was added from 125 <br /> V-- r='� feet bgs to 130 bgs due to soil slumping. <br /> Project: 60046012.0001 Template:Design-Rotosonic.idfx Page:2 of 3 <br /> Data File:S13-2.dat Date:3/20/2009 K.Wynne <br />