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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 />LSG-104 <br />Page 1 of 2 <br />Project: LFG Monitoring Well Installation <br />Remarks: <br />Client: San Joaquin County <br />Location: Foothill Sanitary Landfill <br />6484 North Waverly Road, Linden, CA <br />rn <br />rn <br />fl <br />N <br />s <br />Material Description <br />Well Diagram <br />o <br />Z <br />a <br />m <br />ML <br />SANDY SILT WITH GRAVEL (ML) brown (7.5YR 5/3), dry, <br />Cement <br />low plasticity fines, approximately 50 % fines, 40 % fine- to <br />5 <br />coarse-grained sand, 10 % gravel <br />5 Bentonite <br />3ft: more gravel (subrounded, u_p_to_2 in.) and cobbles_ <br />10 <br />SM <br />_ <br />------- — --- --� <br />SILTY SAND WITH GRAVEL (SM) dry, brown (7.5YR 4/4), <br />Gravel <br />10 filter pack <br />approximately 50 %fine -to coarse-grained sand, 20 % low <br />plastic fines, 30 % gravel (subrounded, up to 3 in.), cobbles <br />Bentonite <br />-11-12 ft: gravel (subrounded) and cobbles, 15 % fines <br />15 <br />GPS <br />•� ° <br />--------------------------------� <br />POORLY GRADED GRAVEL (GP) and COBBLES gravel is <br />20 <br />SW -SM::::::::::: <br />:... <br />��subrounded, up to 3 in. <br />20 <br />--------------------------------J <br />WELL GRADED SAND WITH SILT AND GRAVEL (SW -SM) <br />SC <br />dark brown (10YR 3/3), dry, approximately 70 % fine- to <br />25 <br />coarse-grained sand, 10 % low plastic fines, 20 % gravel <br />25 <br />(subrounded) <br />30 <br />CLAYEY SAND (SC) dark yellowish brown (10YR 3/4), <br />30 <br />approximately 40 % medium plasticity fines, 60 % fine-grained <br />Gravel <br />35 <br />Sand <br />- some weakly cemented sand <br />filter pack <br />35 <br />- 38ft: approximately 30 % medium plasticity fines, 70 % <br />40--_ <br />_fine_-g_rain_e_d sand, _some _weakly _cemented _sand <br />_ _ <br />CL <br />SANDY LEAN CLAY (CL) dark yellowish brown (10YR <br />45 <br />3/4)moist, approximately 50 % medium plasticity fines, 50 % <br />45 <br />fine-grained sand <br />50 <br />50 <br />Bentonite <br />55 <br />55 <br />- same, except brown (10YR 4/3) <br />60-- <br />0 <br />65-- <br />65 <br />s5 <br />- same to bottom, except dark yellowish brown (10YR 3/4), 50 - <br />70 <br />70 % medium plasticity fines, 30 - 50 % fine-grained sand <br />0 <br />70-- <br />TGravel <br />75 <br />75 filter pack <br />0 <br />80-- <br />Drilling Company: PC Exploration <br />Drilling <br />Date Started: 8/10/2009 Time Started: 12:45pm <br />Drilling Method: Hollow Stem Auger <br />Date Completed: 8/11/2009 Time Completed: 1:50pm <br />Boring Diameter: 8 inch <br />Elevation (ft): 252.056 Total Depth (ft): 92 <br />Logged By: Kristin Sample, PE <br />Groundwater Level: NFWE <br />Sampling Method: Grab from cuttings <br />