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Vector Engineering, Inc. 143E Spring Hill Drive Grass Valley, CA 95945 Telephone: 530-272-2448 Fax: 530-272-8533 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 0) J aMaterial Description Well Diagram c� ML[ SANDY SILT (MLS reddish brown (5YR 4/4), dry, nonplastic, Cement approximately 70 % fines, 30 % fine-grained sand 5 _ _ SM I - stiffer from 2 - 4 ft. Possible hardpan depth i ----------------------------------� 5 Bentonite SILTY SAND (SM) brownish yellow (10YR 6/6), dry, 10 SC nonplastic, approximately 40 % fines, 60 % fine-grained sand, < 5 % / Gravel �o .' filter pack gravel �--------------------------------� CLAYEY SAND (SC) dark yellowish brown (10YR 4/4), dry, Bentonite 15 low plasticity, approximately 20 % fines, 80 % fine sand 15 -12 ft: less fines, some weak cementation 20 -13 -15 ft: very hard drilling 20 :. - becomes brown (7.5 YR 4/4) T. 25 - brown (7.5YR 4/3), moist, medium plasticity, approximately 30 % fines, 70 % fine-grained sand 25 ' - same as previous, with some weakly cemented sand 30 30 Gravel filter pack 35- 35—:'. - increase in fines, approximately 40 % fines, 60 % sand 40-- 40 CL SANDY CLAY (CL) dark yellowish brown (10YR 4/4), moist, 45 medium plasticity, approximately 60 % fines, 40 % fine-grained 45 sand Bentonite 50 50 - increase in fines, approximately 80 % fines, 20 % fine-grained 55 sand 55 - slightly less fines, approximately 60-70 % fines, 30-40 % 60 fine-grained sand so 65 65 Gravel 70 filter pack 70 ' 75-- 80 ,95 X. 0 80-- Drilling Company: PC Exploration Date Started: 7/27/2009 Time Started: 2:15pm Drilling Method: Hollow Stem Auger ' Date Completed: 7/28/2009 Time Completed: 11:15am Boring Diameter: 8 inch Elevation (ft): 118.464 Total Depth (ft): 85 Logged By: Kristin Sample, PE Groundwater Level: NFWE Sampling Method: Grab from cuttings 7