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C <br />C. <br />Vector Engineering, Inc. <br />143E Spring Hill Drive <br />Grass Valley, CA 95945 <br />Telephone: 530-272-2448 <br />Fax: 530-272-8533 <br />8AW&W"_ I - . M. <br />Project: LFG Monitoring Well Installation <br />Remarks: <br />Client: San Joaquin County <br />Location: North County Sanitary Landfill <br />17720 East Harney Lane, Lodi, CA <br />rn <br />°0 <br />Material Description <br />Well Diagram <br />0 <br />ML <br />SANDY SILT (ML) brown (7.5YR 4/4), dry, low plasticity, <br />Cement <br />approximately 60 % fines, 40 % fine-grained sand <br />5-- <br />- first couple feet very stiff. difficult to identify specific hardpan <br />5 Bentonite <br />10 <br />SM <br />:. <br />depth ____ _______ ___ <br />SILTY SAND (SM) brown (7.5YR 4/4), moist, low plasticity J' <br />10 filGter pack <br />fines, approximately 20 % fines, 80 % fine-grained sand <br />Bentonite <br />15 <br />- color change to brown (7.5YR 5/4) <br />15 <br />20 <br />SC <br />CLAYEY SAND (SC) brown (7.5 YR 4/3), medium plasticity <br />20 : <br />fines, approximately 30 % fines, 70 % fine- to coarse-grained <br />sand <br />25 <br />- dark yellowish brown (10 YR 4/4), moist, low plasticity, weak <br />25 <br />cementation, approximately 20 % fines, 80 % fine- to <br />30 <br />medium -grained sand <br />30 Gravel <br />- same as previous except: medium plasticity fines, <br />filter pack <br />approximately 40 % fines, 60 % fine-grained sand <br />35 <br />35 : <br />CL <br />SANDY CLAY (CL) brown (10YR 4/3), moist, medium <br />40 <br />plasticity, approximately 60 % fines, 40 % fine-grained sand <br />0 <br />40-- <br />45 <br />45-- <br />45 Bentonite <br />50 <br />- approximately 50 % fines, 50 % fine-grained sand <br />50 <br />55 <br />- same as previous, with some weakly cemented sand <br />55 <br />60 <br />so Z <br />65 <br />- dark yellowish brown (10YR 4/6), medium plasticity, <br />s5 <br />approximately 70 % fines, 30 % fine-grained sand <br />Gravel <br />70 <br />- slight color change to dark yellowish brown (10YR 4/4) <br />70 .- filter pack <br />75 <br />- sand portion is fine- to medium -grained <br />75 <br />80 <br />- approximately 60 % fines, 40 % sand <br />85 <br />- approximately 50 % fines, 50 % sand <br />85 <br />Drilling Company: PC Exploration <br />Date Started: 7/24/2009 Time Started: 10:40am <br />Drilling Method: Hollow Stem Auger <br />Date Completed: 7/27/2009 Time Completed: 12:15pm <br />Boring Diameter: 8 inch <br />Elevation (ft): 120.333 Total Depth (ft): 87 <br />Logged By: Kristin Sample, PE <br />Groundwater Level: NFWE <br />Sampling Method: Grab from cuttings <br />