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Vector Engineering, Inc. <br />143E Spring Hill Drive WELL NUIVIDEK <br />Grass Valley, CA 95945 Pagel of 2 <br />Telephone: 530-272-2448 <br />Fax: 530-272-8533 <br />Project: LFG Monitoring Well Installation <br />Remarks: <br />Client: San Joaquin County <br />Hollow stem auger rig encountered refusal at 30 ft. <br />Location: Foothill Sanitary Landfill <br />Well completed with air rotary rig. <br />6484 North Waverly Road, Linden, CA <br />v N <br />0 <br />J <br />o j <br />a <br />Material Description <br />Well Diagram <br />CU <br />0 <br />SW -SM <br />;•;•' ' ' <br />WELL GRADED SAND WITH SILT (SW -SM) dark yellowish <br />Cement <br />brown (10YR 4/4), dry, nonplastic, approximately 10 % fines, <br />5 <br />80 % fine- to coarse-grained sand, 10 % gravel (up to 2 -in.), <br />5 Bentonite <br />some cobbles up to 3 in. <br />Gravel <br />10 <br />10 filter pack <br />.i.i. <br />- brown (10YR 4/3), approximately 10 % low plastic fines, 60 % <br />Bentonite <br />15 <br />fine- to coarse-grained sand, 30 % gravel <br />15 <br />SW-SC <br />;';•; ;•;• <br />----------------------------------- <br />WELL GRADED SAND WITH CLAY AND GRAVEL <br />20 <br />(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 <br />.�.�. <br />z5 <br />- 50 % gravel (up to 1.5 -in., subrounded), 50 % fine- to <br />30------ <br />" o <br />coarse-grained —sand <br />___ -- — --- — — — - <br />30 <br />° °0 <br />SILTY GRAVEL WITH SAND (GM) very dark grayish brown <br />o0 C <br />(10YR 3/2), approximately 40 % gravel (up to 3 in, <br />-44 Gravel <br />35 <br />subrounded), 30 % sand, 30 % fines, difficult drilling <br />35 filter pack <br />SAND WITH SILT (SP -SM) very dark grayish brown (10YR <br />40 <br />--- <br />3/2), moist, fine-grained dark lithic sand _ _ _ _ _ <br />— — <br />40 <br />X x x x <br />X X " <br />SILTSTONF laminated (1 mm) alternating light and dark <br />X x x x <br />X x x x <br />bands <br />45 <br />x x x x <br />X x x x <br />x x x x <br />45 <br />— ——-"-'—. <br />— — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — — <br />SANDSTONE, brown, moderately cemented, very fine <br />.. . <br />50 <br />.... <br />grained <br />50 <br />Bentonite <br />55 <br />_ <br />--- <br />WITH SILT (SP -SM) dark grayish brown weakly to <br />55 <br />moderately cemented, thoroughly disarticulated, fine-grained <br />60 <br />sand <br />60 Gravel <br />filter pack <br />65 <br />SANDSTONE, brown, moderately cemented, very <br />fine-grained <br />70 <br />70 <br />75 <br />- black sandstone <br />75 <br />80 <br />80 <br />rilling Company: PC Exploration/Westex <br />Date Started: 7/29/2009 Time Started: 12:55pm <br />rilling Method: HSA/Air Rotary <br />Date Completed: 8/6/2009 Time Completed: 12:30pm <br />Boring Diameter: 8-5/8 in <br />Elevation (ft): 254.295 Total Depth (ft): 98 <br />Logged By: Pete Holland, CEG <br />Groundwater Level: NFWE <br />Sampling Method: Grab from cuttings <br />