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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: - <br />17 <br />Page 1 of 1 <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 />Material Description <br />Well Diagram <br />CL <br />0 <br />SM <br />SILTY SAND (SM) <br />Cement <br />5 <br />5 Bentonite <br />CL <br />SANDY CLAY (CL) dark yellowish brown (10YR 3/4) moist, <br />Gravel <br />10 <br />stiff, medium plasticity, approximately 60 % fines, 40 % sand <br />10 filter pack <br />Bentonite <br />15 <br />___ <br />SM/SC <br />.. ::. <br />___________________________ _______15 <br />SILTY SAND/CLAYEY SAND (SM/SC) dark yellowish brown <br />(10YR 3/4), very moist, approximately 40 % fines, 60 % <br />20 -- <br />fine-grained sand <br />20—.-.. <br />25 <br />CL <br />SANDY CLAY (CL) very dark grayish brown (10YR 3/2), <br />moist, low/medium plasticity, approximately 70 % fines, 30 % <br />25 <br />sand <br />Gravel <br />30 <br />SC <br />CLAYEY SAND (SC) dark brown (10YR 3/3), moist, <br />30 filter pack <br />approximately 40 % fines, 60 % fine- to medium -grained sand <br />35-- <br />5 <br />35 <br />40 <br />4- <br />40•': <br />CL <br />_____ ____________ ___ <br />SANDY CLAY (CL) dark yellowish brown (10YR 4/4) moist, <br />stiff, low to medium plasticity, approximately 60 % fines, 40 % <br />Bentonite <br />45 <br />sand <br />a5 <br />0 <br />50-- <br />50 <br />5 <br />55-- <br />.2 <br />60 <br />60-- <br />NJ: <br />- increase in plasticity <br />Gravel <br />65 <br />65-1 filter pack <br />70-- <br />0 <br />75 <br />75 <br />- drilling stiffened up and became very slow at 75 ft. added 3 <br />75 <br />gal water to facilitate drilling <br />An <br />Drilling Company: PC Exploration <br />Date Started: 7/22/2009 Time Started: 12:30pm ' <br />Drilling Method: Hollow Stem Auger <br />Date Completed: 7/23/2009 Time Completed: 11:40am <br />Boring Diameter: 8 inch <br />Elevation (ft): 114.846 Total Depth (ft): 80 <br />Logged By: Pete Holland, CEG <br />Groundwater Level: NFWE <br />Sampling Method: Grab from cuttings <br />