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Vector Engineering, Inc.
<br />143E Spring Hill Drive
<br />Grass Valley, CA 95945
<br />Telephone: 530-272-2448
<br />Fax: 530-272-8533
<br />TIELL NUMBER: SG -12(l
<br />Page 1 of 2
<br />Project: LFG Monitoring Well Installation
<br />Remarks:
<br />Client: San Joaquin County
<br />Moved intermediate plug down 1 ft due to sand layer.
<br />Location: Foothill Sanitary Landfill
<br />6484 North Waverly Road, Linden, CA
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<br />Material Description
<br />Well Diagram
<br />CL
<br />C�
<br />SM
<br />SILTY SAND WITH GRAVEL (SM) dry, strong brown (7.5YR
<br />Cement
<br />4/6), low plasticity, 60 % fine- to coarse-grained sand, 20 %
<br />5
<br />silt, 20 % gravel (subrounded, up to 1-1/5 in.)
<br />5 Bentonite
<br />10
<br />- dark brown (10YR 3/3), no gravel, approximately 20 % fines,
<br />Gravel
<br />10 filter pack
<br />15
<br />CL
<br />X80 % fine-grained sand---------------------
<br />SANDY CLAY (CL) dark yellowish brown (10YR 4/4), moist,
<br />Bentonite
<br />medium plasticity, approximately 70 % fines, 30 % fine-grained
<br />15
<br />sand
<br />20
<br />- same, except 50 % fines, 50 % sand
<br />20--:.
<br />SC
<br />CLAYEY SAND (SC) dark yellowish brown (10YR 4/4),
<br />25
<br />moist, medium plasticity, 20 - 40 % fines, 60 - 80 %
<br />z5 ;
<br />fine-grained sand
<br />30------
<br />—
<br />30 ;
<br />30—
<br />SM
<br />SILTY SAND (SM) dark brown (10Yr 3/3), moist, low
<br />plasticity, approximately 20 % fines, 80 % fine- to
<br />ravel
<br />35
<br />medium -grained sand, some weakly cemented sand
<br />fiGer pack
<br />35-2
<br />40
<br />---
<br />SW -SM
<br />;:;•; ; ; ;
<br />WELL GRADED SAND WITH SILT (SW-SM)dark brown
<br />(10YR 3/3), moist, approximately 90 % fine- to coarse-grained
<br />45
<br />sand, 10 % low plastic fines, some weakly cemented sand
<br />45 =:
<br />layers
<br />50
<br />SC
<br />CLAYEY SAND (SC) brown (7.5YR 4/4), moist medium
<br />50
<br />plasticity, approximately 30 % fines, 70 % sand
<br />Bentonite
<br />55
<br />55
<br />60
<br />SM
<br />SILTY SAND (SM) moist, approximately 20%low plastic
<br />so
<br />fines, 80 %fine - to medium -grained sand
<br />65 --_SC
<br />--
<br />65
<br />CLAYEY SAND (SC) dark yellowish brown (10YR 4/3),
<br />moist, medium plasticity, approximately 40 % fines, 60 %
<br />70
<br />fine-grained sand, easy drilling
<br />70
<br />75—
<br />— — — — —
<br />Gravel
<br />75 .' filter pack
<br />SP -SM
<br />:•:.::; :..'
<br />POORLY GRADED SAND WITH SILT (SP-SM)moist,
<br />approximately 10 % fines, 90 % fine- to medium -grained sand
<br />80
<br />---.:..:
<br />SP
<br />-----------------------------------
<br />POORLY GRADED SAND (SP) very dark grayish brown
<br />so
<br />(10YR 3/2), mostly medium -grained sand, < 5 % fines, some
<br />cemented sand (weak to moderate), < 5 % gravel
<br />RR
<br />Drilling Company: Technicon
<br />Date Started: 8/4/2009 Time Started: 7:15am
<br />Drilling Method: Hollow Stem Auger
<br />Date Completed: 8/4/2009 Time Completed: 12:00pm
<br />Boring Diameter: 8 in
<br />Elevation (ft): 252.087 Total Depth (ft): 92
<br />Logged By: Kristin Sample, PE
<br />Groundwater Level: NFWE
<br />Sampling Method: Grab from cuttings
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