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Vector Engineering, Inc. <br /> 143E Spring Hill Drive WELL SG.102 <br /> Grass Valley, CA 95945 Pagel 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 30 ft. <br /> Location: Foothill Sanitary Landfill Well completed with air rotary rig. <br /> 6484 North Waverly Road, Linden, CA <br /> rn <br /> o <br /> N J <br /> � U <br /> o ? Material Description Well Diagram <br /> 0 <br /> SW-SM ;•;•• • ' • WELL GRADED SAND WITH SILT(SW-SM)dark yellowish kHO Cement <br /> brown (10YR 4/4), dry, nonplastic, approximately 10 %fines, <br /> 5 80% fine-to coarse-grained sand, 10 % gravel(up to 2-in.), 5 Bentonite <br /> some cobbles up to 3 in. Gravel <br /> 10 <br /> 10 filter pack <br /> -brown (10YR 4/3), approximately 10 % low plastic fines, 60 % Bentonite <br /> ___ ;•;•; <br /> :J:; fine-to coarse-grained sand, 30 %gravel 15 <br /> ---------------------------------- <br /> SW-SC ;•;•; ;•;• WELL GRADED SAND WITH CLAY AND GRAVEL <br /> 20 (SW-SC), brown (10YR 4/3), moist, approximately 10% low- <br /> 20 <br /> to medium-plasticity fines, 75 %fine-to coarse-grained sand, <br /> 15 % gravel (up to 3/4 in., subrounded) <br /> 25 25 <br /> -50 % gravel (up to 1.5-in., subrounded), 50 %fine-to <br /> 30-- G a coarse-grained sa_nd_________________ ———- so <br /> ° °° SILTY GRAVEL WITH SAND(GM)very dark grayish brown <br /> (10YR 3/2), approximately 40% gravel (up to 3 in, Gravel <br /> 35 subrounded), 30% sand, 30 %fines, difficult drilling 35 filter pack <br /> SP-SM SAND WITH SILT(SP-SM) very dark grayish brown (10YR <br /> 40 3/2), moist, fine-graine_d_dark_lithic_sand <br /> ______ <br /> --- - ———— 40 <br /> " " " X —SILTSTONI, laminated (1 mm) alternating light and dark <br /> XX <br /> x x x <br /> X X X X bands <br /> X X X X <br /> 45 X X X X <br /> xxxx 45 <br /> X x X x <br /> --- —.--.--- —g-------------------------------- <br /> 50 :::::: SANDSTONE, brown, moderately cemented, very fine <br /> rained 50 <br /> Bentonite <br /> 55 --- 55 <br /> SAND WITH SILT(SP-SM) dark grayish brown weakly to <br /> 60 moderately cemented, thoroughly disarticulated, fine-grained Gravel <br /> sand 60 <br /> filter pack <br /> 65 <br /> SANDSTONE brown, moderately cemented, very <br /> fine-grained <br /> 70-- <br /> ... 70 <br /> 75 <br /> -black sandstone 75 <br /> 80 80 <br /> Drilling Company: PC Exploration/Westex Date Started: 7/29/2009 Time Started: 12:55pm <br /> Drilling Method: HSA/Air Rotary Date Completed: 8/6/2009 Time Completed: 12:30pm <br /> Boring Diameter: 8-5/8 in Elevation (ft): 254.295 Total Depth (ft): 98 <br /> Logged By: Pete Holland, CEG Groundwater Level: NFWE <br /> Sampling Method: Grab from cuttings <br />