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Vector Engineering, Inc. 143E Spring Hill Drive Grass Valley, CA 95945 Telephone: 530-272-2448 Fax: 530-272-8533 WELL NUMBER: Page I of I Project: LFG Monitoring Well Installation Remarks: Client: San Joaquin County Location: North County Sanitary Landfill 17720 East Harney Lane, Lodi, CA U rn J 'a CO Material Description Well Diagram CL m 0 SM SILTY SAND (SM) brown (7.5YR 5/4), moist, low plasticity, Cement approximately 20 % fines, 80 % fine-grained sand 5 5 Bentonite 10 Gravel 10 filter pack SC CLAYEY SAND (SC) brown (7.5YR 4/4), moist low Bentonite 15 plasticity, approximately 15 % fines, 85 % fine-grained sand 15 - same, except slightly more fines 20 20 - more fines - approximately 40 % fines, 60 % sand 25 - brown (7.5YR 4/3), low plasticity, approximately 15 % fines, 25 85 % medium- to coarse-grained sand 30 CL SANDY CLAY (CL) brown (10YR 4/3), moist, medium 30 Gravel plasticity, approximately 70 % fines, 30 % fine-grained sand filter pack 35 35--: . - same, except brown (7.5YR 4/4) 40 ao : • 45 a5 Bentonite 50 50 :. - same to bottom of hole, with approximately 60 % to 80 % 55 fines, and 20 % to 40 % fine-grained sand, color brown (7.5YR 55 •' 4/4, 10YR 4/3) 60-- 0 65 65-- 65 -4Gravel 70 filter pack 70 ' 5 75-- 80-- 80 85 8 8 Drilling Company: PC Exploration Date Started: 7/22/2009 Time Started: 9:40am Drilling Method: Hollow Stem Auger Date Completed: 7/22/2009 Time Completed: 3:30pm Boring Diameter: 8 inch Elevation (ft): 127.125 Total Depth (ft): 85 Logged By: Kristin Sample, PE Groundwater Level: NFWE Sampling Method: Grab from cuttings 7