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Vector Engineering, Inc. 143E Spring Hill Drive WELLSG-109 Grass Valley, CA 95945 Page 1 of 2 Telephone: 530-272-2448 Fax: 530-272-8533 Project: LFG Monitoring Well Installation Remarks: Client: San Joaquin County Hole overdrilled to 170 ft. Location: Foothill Sanitary Landfill Placed 4 ft of gravel at bottom. 6484 North Waverly Road, Linden, CA Deep probe placed at 166 ft, as designed. rn QMaterial Description Well Diagram ® m c� GW a WELL GRADED GRAVEL AND COBBLES WITH SAND Cement 5 ® (GW) 5 Bentonite e • Gravel 10 ® • 10 filter pack e • se Bentonite 15 ® ® 15 20 ®® • 20 :. e • °e • 25 --- XX X X —SILTSTON� brown, weakly cemented, laminated, trace 25 X x x x X X X X X X X X lenses of sand X x x x 3O X X X X xxxx 30 X x x x X x x x X x x x 35 X X X X X x x x 35 X x x x X x x x X x x x 40 x x x x xxxx 40 X x x x X x x x X x x x 45 X X X X X X x x 45 X X X X Gravel X X X X filter pack X X X x ------ 50 SP POORLY GRADED SAND (SP)black sand weakly cemented 55 55 60 so --- XX XXXX XX SILTSTONE brown, moderately cemented 65 xxxx 65 X x x x X X X X X X X X X X X X 7O X X X X X X X X 70 X x x x X x x x X x x x 75 X X X X xxxx 75 X x x x X x x x X x x x 80 x x x x xxxx 80 X X X X Bentonite X X X X X X X X XX x X X X X X X Drilling Company: Westex Date Started: 8/12/2009 Time Started: 1:00pm Drilling Method: Air Rotary Date Completed: 8/13/2009 Time Completed: 1:00pm Boring Diameter: 8-5/8 in Elevation (ft): 326.281 Total Depth (ft): 170 Logged By: Pete Holland, CEG Groundwater Level: NFWE Sampling Method: Grab from cuttings