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Date Start/Finish: 1/18/2008 1/23/08 Northing:2164643.229 Well/Boring ID: MW-7B <br /> Drilling Company: Cascade Drilling, Inc. Easting:6332644.072 <br /> Driller's Name: Amador Arroyo Casing Elevation: 11.9091 Client: Chevron Environmental Management <br /> Drilling Method: Hollow Stem Auger <br /> Auger Size: 14"OD then 8"OD Borehole Depth: 38 feet Location:Chevron Service Station 9-2033 <br /> Rig Type: Truck-Mounted Hollow Stem Rig Surface Elevation: 11.9091 508 West Charter Way <br /> Sampling Method: 2"Split Spoon-No Sleeves Stockton,California <br /> Descriptions By: BJ Wall <br /> E <br /> a� n <br /> � � c <br /> Z a°'i M � Well/Boring <br /> Z c c c O <br /> Oc o �o Stratigraphic Description Construction <br /> — o <br /> 2 Q a Q o (3: m 2 0 <br /> o > o <br /> LU � m <br /> o w U) cn z <br /> Steel flush mount <br /> Locking J-plug <br /> [ASPHALT] 00 " <br /> Air Knife to 8'1". Concrete pad(0'- <br /> 0.5'bgs) <br /> 70 <br /> 2"dia.Schedule 80 <br /> PVC riser(0'-33' <br /> bgs) <br /> 1 0-8 8.0 NA NA <br /> Steel conductor <br /> casing(0'-25'bgs) <br /> 5 <br /> Start logging at 10' <br /> 2 8-10 2.0 NA NA Inner cement grout <br /> (2'-29'bgs) <br /> 10 — <br /> 6 =— Light brown CLAY(CL),trace fine Sand,hydrocarbon odor,dry. <br /> 9 <br /> 3 10-12 2.0 4 13 345 =— <br /> 0 — <br /> 5 _— Outer cement grout <br /> _— <br /> (2'-29'bgs) <br /> 5 =- <br /> 4 12-14 2.0 7 12 3472 -- <br /> 8 =— Grades with some fine to coarse Sand, damp. <br /> 12 3197 =- <br /> 1' 5 14-16 2.0 15 27 2701 -- <br /> Remarks: bgs=below ground surface; NA=Not Applicable/Available;AMSL=Above Mean Sea <br /> Level.Odorless unless stated otherwise. <br /> ARCADISNorthing/Easting Datum is NAD83. <br /> Infrastructure,environrnent,, facilities Elevation Datum is NAVD88. <br /> Project Number:B0045977.0000.00Template:G:\ENV\CHEVRON\LIBRARY\LOG PLOT\2005 Templates\boring_we112005.IDF Page: 1 of 3 <br /> Data File:MW-7B.Dat Date:6/25/2008 Brett Krehbiel <br />