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Vector Engineering, Inc. 143E Spring Hill Drive WELL -124 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 Hole overdrilled to 88 ft. Location: Foothill Sanitary Landfill Placed 1 ft of gravel at bottom. 6484 North Waverly Road, Linden, CA Deep probe placed at 87 ft, as designed. rn J o = Q Material Description Well Diagram m 0 GM o 0 o SILTY GRAVEL WITH SAND (GW) Cement 5 SM SILTY SAND WITH GRAVEL(SM)dark brown (7.5YR 3/2), 5 Bentonite moist, sand is fine and composed of siltstone, gravel is 10 volcanic derived 10 Gravel filter pack Bentonite 15 _G_W_ __GR_A_V_E_LA_NDCO_B_B_L_ES (GW) ________ 15 CL SANDY CLAY WITH GRAVEL(CL)brown (7.5YR 3/2) 20 moist, approximately 30 % sand, 70% clay, medium plasticity 20 :. 25 ----------------------------------- SM SILTY SAND WITH GRAVEL(SM)brown (7.5YR 3/2), 25 moist, dense, approximately 50% sand, 30% fines, 20% 30 gravel, low plasticity 30 much of the gravel is pieces of siltstone from lithified siltstone Gravel lenses filter pack 35 -- 40 -- 5 40 40-- 45 - 0 45CL SANDY CLAY(CL), brown, moist, stiff, medium plasticity 45 50 50 Bentonite 55 55 60 _ --_ 60 ML SANDY SILT(ML) dark grayish brown (10YR 4/2), moist 65 nonplastic, approximately 40 % sand, 60%fines, trace gravel s5 —————————————————————————————————— 70 SM SILTY SAND(SM) brown (7.5YR 4/3), moist, dense, 70 Gravel approximately 60%fine-grained sand,40%fines filter pack 75 75 80 -- 85 0 85 85 Drilling Company:Technicon Date Started: 7/30/2009 Time Started: 7:45am Drilling Method: Hollow Stem Auger Date Completed: 7/30/2009 Time Completed: 3:30pm Boring Diameter: 8 in Elevation (ft): 247.145 Total Depth (ft): 88 Logged By: Pete Holland, CEG Groundwater Level: NFWE Sampling Method: Grab from cuttings