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Vector Engineering, Inc. 143E Spring Hill Drive WELL NUMBER: SG -104 Grass Valley, CA 95945 Pagel of 2 Telephone: 530-272-2448 Fax: 530-272-8533 Project: LFG Monitoring Well Installation Remarks: Client: San Joaquin County Location: Foothill Sanitary Landfill 6484 North Waverly Road, Linden, CA rn U) J CL ? Q Material Description Well Diagram c� 55 55 - same, except brown (10YR 4/3) 60 60 65 65 - same to bottom, except dark yellowish brown (10YR 3/4), 50 - 70 70 % medium plasticity fines, 30 - 50 % fine-grained sand 70 Gravel 75 75 filter pack 80 80 8.5 — ua Drilling Company: PC Exploration ML SANDY SILT WITH GRAVEL (ML) brown (7.5YR 5/3), dry, Cement Boring Diameter: 8 inch Elevation (ft): 252.056 Total Depth (ft): 92 low plasticity fines, approximately 50 % fines, 40 % fine- to Groundwater Level: NFWE 5 coarse-grained sand, 10 % gravel 5 Bentonite _ _ _ -_3ft_:_m_or_e gravel (subrounded, u_p_to_2_in.) and c_o_bble_s_ \SILTY 10 SM _ _ SAND WITH GRAVEL SM d brown 7.5YR 4/4 — ( ) dry, ( ). Gravel 10 ° ° approximately 50 /° fine -to coarse-grained sand, 20 /o low filter pack plastic fines, 30 % gravel (subrounded, up to 3 in.), cobbles Bentonite 15 — - 11-12 ft: gravel (subrounded) and cobbles, 15 % fines ----------------------------------- 15 GP POORLY GRADED GRAVEL (GP) and COBBLESgravel is \�s_u_br_ou_n_de_d, 20 SW -SM :•' up to in. __________J 20 ... WELL GRADED SAND WITH SILT AND GRAVEL (SW -SNS) SC t dark brown (10YR 3/3), dry, approximately 70 % fine- to 25, coarse-grained sand, 10 % low plastic fines, 20 % gravel 25 (subrounded) 30 CLAYEY SAND (SC) dark yellowish brown approximately 40 % medium plasticity fines, 60 % fine-grained 30 sand Gravel 35 - some weakly cemented sand 35 filter pack - 38ft: approximately 30 % medium plasticity fines, 70 % 40 -grained sand, 40 CL _fine_ _some _weakly _cemented _sand SANDY LEAN CLAY (CL) dark yellowish brown (10YR 45 3/4)moist, approximately 50 % medium plasticity fines, 50 % 45 fine-grained sand 50 50 ... . Bentonite 55 55 - same, except brown (10YR 4/3) 60 60 65 65 - same to bottom, except dark yellowish brown (10YR 3/4), 50 - 70 70 % medium plasticity fines, 30 - 50 % fine-grained sand 70 Gravel 75 75 filter pack 80 80 8.5 — ua Drilling Company: PC Exploration Date Started: 8/10/2009 Time Started: 12:45pm Drilling Method: Hollow Stem Auger Date Completed: 8/11/2009 Time Completed: 1:50pm Boring Diameter: 8 inch Elevation (ft): 252.056 Total Depth (ft): 92 Logged By: Kristin Sample, PE Groundwater Level: NFWE Sampling Method: Grab from cuttings