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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: SG -106 Pagel of 2 Project: LFG Monitoring Well Installation Remarks: Client: San Joaquin County Location: Foothill Sanitary Landfill 6484 North Waverly Road, Linden, CA � 0) J CL CD a Material Description Well Diagram c� C7 ML SANDY SILT (MLA strong brown (7.5YR 4/6), dry, Cement approximately 70 % low plastic fines, 30 % fine- to 5 medium -grained sand, pieces of moderately cemented sand 5 Bentonite -5ft: 50 % fines, 25 % sand, 25 % gravel (subrounded, up to 3 10in.), some cobbles, pieces of cemented sand : : 10 Gravel GMS — — — — — — — — — — — — — SILTY GRAVEL AND COBBLES (GM)---_____--__� filter pack ML I SANDY SILT WITH GRAVEL (ML) brown (10YR 4/3) moist, Bentonite 15_____ GP U ° \ approximately 50 % low plastic fines, 40 % fine- to 15 :¢- \coarse-grained sand, 10 % gravel (subrounded, up to 2 in.) /— \--------------------------------J/ 20 :. `:`' :: \ P_OO_RL_Y_G_RA_DE_D_G_R_A_V_EL (GP) AN_D_C_O_BBLE_S_ _ _ _ _/ 20 GM _ SILTY SAND WITH GRAVEL(SM) brown (10YR 4/3), moist ° approximately 30 % low plasticity fines, 40 % fine- to 25 0 0 coarse-_graine_d_san_d, 30 % gravel (subrounded, up to 3 in.) 25 '' ° o --- -- -- — SILTY GRAVEL WITH SAND (GM) brown (10YR 4/3), moist, 30 --approximately approximately 40 % gravel (subrounded, up to 2.5 in.), 35 % 30 SC \ fine- to coarse-grained sand, 25 % low plastic fines, some \ cobbles / 35 -------------------------------- _ CLAYEY SAND (SC) dark yellowish brown (10YR 3/4), 35 moist, approximately 30 % medium plasticity fines, 60 % fine - 40 to coarse-grained sand (mostly fine), 10 % gravel (subrounded, :. Gravel -- _ CL "' up to 1 in.) , -------------------------------� 40 :.'. '. '. filter pack SANDY CLAY (CL) dark yellowish brown (10YR 3/4), moist, 45 approximately 50 % medium plasticity fines, 50 % fine-grained 45--:..-:: sand -48ft: same, except more fines, approximately 60 % fines, 40 50 sand 50--:.. -52ft: same, except more fines, approximately 70 % fines, 30 % 55 sand 5.5-- 60-- 60 65 65 Bentonite 70 70-- 75-- 75-- 580 801 -81 ft: same, except dark brown (10YR 3/3) Drilling Company: PC Exploration Date Started: 8/11/2009 Time Started: 3:00pm Drilling Method: Hollow Stem Auger Date Completed: 8/13/2009 Time Completed: 1:50pm Boring Diameter: 8 inch Elevation (ft): 280.924 Total Depth (ft): 120 Logged By: Kristin Sample, PE Groundwater Level: NFWE Sampling Method: Grab from cuttings J 7 J