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Vector Engineering, Inc. <br />143E Spring Hill Drive <br />Grass Valley, CA 95945 <br />Telephone: 530-272-2448 <br />Fax: 530-272-8533 <br />L e -1 ■ <br />Page 1 of 2 <br />Project: LFG Monitoring Well Installation <br />Remarks: <br />Client: San Joaquin County <br />Hole overdrilled to 150 ft. <br />Location: Foothill Sanitary Landfill <br />Placed 4 ft of gravel at bottom. <br />6484 North Waverly Road, Linden, CA <br />Deep probe placed at 146 ft, as designed. <br />= <br />Material Description <br />Well Diagram <br />o <br />a <br />cc <br />W -G <br />,• <br />WELL GRADED GRAVEL WITH SILT AND SAND (GW -GM) <br />Cement <br />AND COBBLES brown, moist, approximately 40 % gravel, <br />5 <br />® <br />25 %sand, 25 %cobbles, 10 %fines, gravel and cobbles well <br />5 <br />Bentonite <br />rounded, bassaltic <br />Gravel <br />10 <br />10 <br />filter pack <br />Bentonite <br />15-- <br />5 <br />20 <br />20-- <br />® <br />20-1 <br />s a <br />25 <br />® <br />25 <br />• a <br />0 <br />30-- <br />• <br />35 <br />35-- <br />® <br />35 ::. <br />--- <br />!.. <br />— — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — <br />SP -SM <br />.`::::::; :.. <br />POORLY GRADED SAND WITH SILT (SP -SM) brown <br />40 <br />(7.5YR 3/2), moist, 90 % fine-grained sand, 10 % fines <br />ao <br />45 <br />SM <br />SILTY SAND (SMA moist, 70 % fine-grained sand, 30 % <br />a5 <br />Gravel <br />fines <br />filter pack <br />0 <br />50-- <br />50 <br />--- <br />x x XX <br />x x x x <br />---------------------------------- <br />SILTSTONE, brown, weakly cemented, laminated <br />55 <br />xxxx <br />X x x x <br />55 <br />X x x x <br />X x x x <br />60 <br />X x x x <br />xxxx <br />X x x x <br />X x x x <br />60 <br />65 <br />X x x x <br />X x x x <br />xxxx <br />xxxx <br />6,5-- <br />5x <br />Xx x x <br />T. <br />X x x x <br />X x x x <br />70 <br />xxxx <br />xxxx <br />X x x x <br />7Q <br />X x x x <br />X x x x <br />75 <br />X x x x <br />xxxx <br />X x x x <br />75 <br />X x x x <br />X x x x <br />Bentonite <br />80 <br />--- <br />X x x x <br />xxxx <br />80 <br />RS <br />POORLY GRADED SAND (SP) black sand <br />R <br />Drilling Company: Westex <br />Date Started: 8/7/2009 Time Started: 3:30pm <br />Drilling Method: Air Rotary <br />Date Completed: 8/11/2009 Time Completed. 10:50am <br />Boring Diameter: 8-5/8 in <br />Elevation (ft): 305.676 Total Depth (ft): 150 <br />Logged By: Pete Holland, CEG <br />Groundwater Level: NFWE <br />Sampling Method: Grab from cuttings <br />7 <br />