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n �J Vector Engineering, Inc. 143E Spring Hill Drive Grass Valley, CA 95945 Telephone: 530-272-2448 Fax: 530-272-8533 WELL NUMBER: Project: LFG Monitoring Well Installation Remarks: Client: San Joaquin County Hole overdrilled to 85.5 ft. Location: North County Sanitary Landfill Placed 0.5 ft of gravel at bottom. 17720 East Harney Lane, Lodi, CA Deep probe placed at 85 ft, as designed. CD v) J Material Description Well Diagram CL 2 SM SILTY SAND (SM) yellow brown (10YR 5/8), moist, low Cement 5 SC ' �p_lasticity ______________ CLAYEY SAND (SC) brown (7.5YFt 4/4), moist, low to 5 Bentonite medium plasticity, approximately 20-30 % fines, 70-80 % 10 fine-grained sand 10 :; Gravel filter pack Bentonite 15 15 - low plasticity, approximately 15-20 % fines, 80-85 % fine 20 sand, stiffer drilling from 20-25 ft 20- 025 25-- 2L: 25 . - same, except dark yellowish brown ('I OYR 4/4) 30 3o Gravel filter pack - same, except brown (7.5YR 4/4) 35 35 - low to medium plasticity, brown (7.5YR 5/4,4/4), approximately 30-35% fines, 65-70% fine-grained sand, easier 40 drilling, clay balls 40 45-- 45 Bentonite CL ______ __________________ _______ SANDY CLAY (CL) brown (7.5YR 4/3, 4/4), moist, medium 50 plasticity, approximately 50 % fines, 50 % fine-grained sand 50 55 55—.* 60 60-- 65-- 5 65-- -4Gravel 70 70 filter pack 75 75-- 80 - same, except approximately 60 % medium plasticity fines, 40 T 80 •• % sand 85 gg ::' Drilling Company: PC Exploration Date Started: 7/21/2009 Time Started: 8:40am Drilling Method: Hollow Stem Auger Date Completed: 7/22/2009 Time Completed: 9:30am Boring Diameter: 8 inch Elevation (ft): 119.233 Total Depth (ft): 85.5 Logged By: Kristin Sample, PE Groundwater Level: NFWE Sampling Method: Grab from cuttings