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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 />WELL NUMBER: ®111 <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 />a <br />Material Description <br />Well Diagram <br />o? <br />0 <br />SP -SC <br />:::'::.. <br />POORLY GRADED SAND WITH CLAY & GRAVEL (SP -SG) <br />Cement <br />dry, brown (7.5YR 4/3), approximately 10 % low/medium <br />5 <br />ML— <br />plasticity fines, 75 % fine- to medium -grained sand, 15 % <br />5 <br />Bentonite <br />gravel (subrounded, up to 2 in.) i <br />10 <br />SANDY SILT (ML) dark brown (10YR 3/3), moist, <br />10 <br />Gravel <br />_ _ _ <br />SC <br />_ <br />approximately 50 % low_ plasticity fines, 50_%_fine-grained sande <br />filter pack <br />CLAYEY SAND (SC) dark yellowish brown (10YR 4/4), <br />Bentonite <br />15 <br />moist, approximately 40 % medium plasticity fines, 60 % <br />15 <br />fine-grained sand <br />20 <br />-some weakly and moderately cemented sand <br />20 <br />-23ft: same, except 15 % medium plasticity fines, 85 % fine- to <br />25 <br />medium -grained sand <br />25—.- <br />5 ''30 <br />30-- <br />-29ft: same, except approximately 30 % medium plasticity <br />30 • <br />fines, 7_0_%_fine-graine_d_sa_nd___________________ <br />SC -SM <br />. '. :.:.. <br />CLAYEY/SILTY SAND (SC -SM) dark yellowish brown (10YR <br />354/4), <br />moist, 20 % low/medium plasticity fines, 80 % fine-grained <br />35 <br />sand <br />40ve <br />SM <br />____—_ <br />SILTY SAND (SM) dark yellowish brown (1o0Yr 4/3), <br />40 <br />Gravel <br />filter pack <br />approximately 20 /° low plasticity fines, 80 /° fine- to <br />45 <br />_ <br />m_e_diu_m-Braine_d_s_an_d_________________ _ <br />45 :. <br />SC <br />CLAYEY SAND (SC) dark yellowish brown (10YR 4/4) —J <br />50 <br />moist, 30 - 40 % medium plasticity fines, 60 - 70 % fine-grained <br />50 <br />sand <br />5 <br />55-- <br />60-- <br />60 <br />60 <br />65 <br />65 <br />70 <br />70 <br />Bentonite <br />75 <br />75 <br />80 <br />80 • <br />CL <br />SANDY CLAY (CL) moist, brown (10YR 4/3), approximately <br />50 % medium plasticity fines, 50 % fine-grained sand <br />Drilling Company: PC Exploration <br />Date Started: 8/13/2009 Time Started: 2:50pm <br />Drilling Method: Hollow Stem Auger <br />Date Completed: 8/17/2009 Time Completed: 12:00pm <br />Boring Diameter: 8 in <br />Elevation (ft): 287.902 Total Depth (ft): 128 <br />Logged By: Kristin Sample, PE <br />Groundwater Level: NFWE <br />Sampling Method: Grab from cuttings <br />