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Vector Engineering, Inc. <br /> 143E Spring Hill Drive WELLSG-103 <br /> Grass Valley, CA 95945 Page 1 of 2 <br /> Telephone:530-272-2448 <br /> Fax: 530-272-8533 <br /> Project: LFG Monitoring Well Installation Remarks: <br /> Client: San Joaquin County Hollow stem auger rig encountered refusal at 13 ft. <br /> Location: Foothill Sanitary Landfill Well completed with air rotary rig. <br /> 6484 North Waverly Road, Linden, CA <br /> 0 <br /> CL � s Material Description Well Diagram <br /> ® c <br /> _ <br /> m <br /> SM/GM° o SILTY SAND AND GRAVEL with COBBLES (SM/GNB) Cement <br /> brown, moist, approximately 30%fines, 30% sand, 30% <br /> 5 , o gravel, 10% cobbles(up to 8 in.,well-rounded, granitic and 5 Bentonite <br /> ° .° sedimentary derived) <br /> Gravel <br /> 10 a 10 filter pack <br /> 15 CL- ° ° 00 -SANDY LEAN CLAY(CL) dark yellowish brown (10YR 3/4), 15 Bentonite <br /> moist, medium plasticity, approximately 50%fines, 50%fine- <br /> `to medium-grained sand, < 5% gravel and_cobbles__----� <br /> GP-GM ------------- - <br /> 20-- POORLY GRADED GRAVEL WITH SILT AND SAND 20 <br /> o (GP-GM), mostly broken cobbles, gravel is subrounded, <br /> approximately 10 % low plastic fines, 30% fine-to <br /> 25- coarse-grained sand 25 <br /> 0 <br /> 30 — ° '° — -- --- _---- --- 30J Gravel <br /> ML SANDY SILT(MLI brown (10YR 4/3), moist, approximately T. <br /> filterack <br /> 30 %fine-to coarse-grained sand, 70% low plastic fines p <br /> 35 35--;- <br /> 40 40 <br /> -some claystone pieces <br /> 45 45 <br /> Bentonite <br /> 50 - - -- - ----------- 50 <br /> SP POORLY GRADED SAND(SP)moist, fine-to <br /> medium-grained sand, < 5 % low plastic fines, some weak <br /> 55 cementation 55 <br /> 60 60 -- <br /> 65 SM SILTY SAND(SM) dark yellowish brown (10YR 4/4), moist s5 <br /> approximately 30 % low plasticity fines, 70% fine-to <br /> medium-grained sand (black pieces), some cemented sand <br /> 70 (sandstone) 70 <br /> at 70ft: approximately 40%fines, 60%fine-grained sand_-- Gravel <br /> 75 SP-SM .:'; :.• POORLY GRADED SAND WITH SILT(SP-SM)moist, 75 filter pack <br /> approximately 10% low plasticity fines, 90 %fine-to <br /> SM <br /> -coarse- --grained sand ( black sand ) ______________i <br /> 80 SILTY SAND(SM) dark yellowish brown (10YR 4/4), moist, 80 <br /> approximately 40 % low plastic fines, 60%fine-to <br /> medium-grained sand <br /> Drilling Company: PC Ex loration/Westex Date Started: 7/29/2009 Time Started: 12:20pm <br /> Drilling Method: HSA/Air Rotary Date Completed: 8/7/2009 Time Completed: 1:35pm <br /> Boring Diameter: 8-5/8 in Elevation (ft): 254.86 Total Depth (ft): 100 <br /> Logged By: Kristin Sample, PE Groundwater Level: NFWE <br /> Sampling Method: Grab from cuttings <br />