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Vector Engineering, Inc. 143E Spring Hill Drive WELL -125 Grass Valley, CA 95945 Page 1 of 1 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 U) Material Description Well Diagram a ML SILT(M), dark brown (10YR 4/3), dry, approximately 90% Cement G_P-GM low plastic fines, 10%_fin_e-grained sand i� Bentonite ----------- 5 ML WELL GRADED GRAVEL WITH SILT(GP-GM)90 % gravel 5 (subrounded u_p_to_1_in.), 10 % low_plastic fines, d_ry_ SM 1 ------= -- ---�1 Gravel 10 1 SANDY SILT WITH GRAVEL(ML)brown (10YR 4/3), dry, 1 10 filterack 1 approximately 50% low plastic fines, 30 %fine-grained sand, 1 p 120% gravel (subrounded, up to 1 in.), layer of weakly Bentonite 15 (cemented sand ______ _ _ __ 15 1------------- — — -- -----� SILTY SAND WITH GRAVEL(SM)dark yellowish brown 20 (10YR 3/4), moist, approximately 20 % low plastic fines, 40 % zo fine-to coarse-grained sand, 40 /o gravel (subrounded, up to 3 in.), some cobble 25 - 18ft: dark brown (10Yr 3/3), 15%fines, 85% sand, some 25 weakly cemented sand 30 -weakly cemented sandstone layers from 22-33 ft 30 Gravel filter pack 35 CL SANDY CLAY(CL) brown (10YR 4/3), moist, medium 35 plasticity, approximately 50 %fines, 50%fine-grained sand 40 40 SM SILTY SAND(SM) dark brown (10YR 3/3), approximately 20 45 -- 0/c low plastic fines, 80%fine-to medium-grained sand,weakly 45 .-...:.. .: cemented sand --:•-. • •• _— Bentonite 50 SP-SM POORLY GRADED SAND WITH SILT(SP-SM)dark 50 brown(10YR 3/3), approximately 10% low plastic fines, 90% fine-to medium-grained sand, some cemented sand layers 55 -- 60 -- AT 5 60 -with 5-10 % gravel (subangular, up to 1 in.) so :.... ... 65 .�:�.��: 65 SC CLAYEY SAND(SC) dark yellowish brown (10YR 3/4) Gravel 70 moist, approximately 15%fines, 85 %fine-grained sand, < 5 70 filter pack % gravel(subrounded, up to 1 in.) 75 75 80 80 7. - 15 -30 % medium plasticity fines, 70-85 %fine-grained sand Drilling Company: PC Exploration/Technicon Date Started: 8/3/2009 Time Started: 9:O0am Drilling Method: Hollow Stem Auger Date Completed: 8/5/2009 Time Completed: 12:00pm Boring Diameter: 8 in Elevation (ft): 244.545 Total Depth (ft): 85 Logged By: Kristin Sample, PE Groundwater Level: NFWE Sampling Method: Grab from cuttings