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Vector Engineering, Inc.
<br /> 143E Spring Hill Drive WELL SG-120
<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 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 /> s Material Description Well Diagram
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<br /> co
<br /> SM SILTY SAND WITH GRAVEL(SM)dry, strong brown (7.5YR Cement
<br /> 4/6), low plasticity, 60 % fine-to coarse-grained sand, 20 %
<br /> 5 silt, 20% gravel (subrounded, up to 1-1/5 in.) 5 Bentonite
<br /> Gravel
<br /> 10 --
<br /> -dark brown (10YR 3/3), no gravel, approximately 20% fines, 10 filter pack
<br /> CL X80% fine-grained sand--------------------- - Bentonite
<br /> 15 SANDY CLY (CL) dark
<br /> Ayellowish brown (10YR 4/4), moist, 15
<br /> medium plasticity, approximately 70%fines, 30%fine-grained
<br /> sand
<br /> 20 ___ _sam_e, e_xce_pt_5_0%_fi_ne_s, 5_0_%_s_an_d 20
<br /> SC CLAYEY SAND(SC) dark yellowish brown (10YR 4/4)
<br /> 25 moist, medium plasticity, 20-40 %fines, 60-80% 25
<br /> fine-grained sand
<br /> 30------ -- so
<br /> SM SILTY SAND(SM) dark brown (10Yr 3/3) moist, low
<br /> plasticity, approximately 20%fines, 80 %fine-to Gravel
<br /> 35 medium-grained sand, some weakly cemented sand 35 filter pack
<br /> 40 — — ------ 40
<br /> SW-SM ; ; ; WELL GRADED SAND WITH SILT(SW-SM)dark brown
<br /> (10YR 3/3), moist, approximately 90%fine-to coarse-grained
<br /> 45 sand, 10% low plastic fines, some weakly cemented sand
<br /> layers
<br /> 50 SC CLAYEY SAND(SC) brown (7.5YR 4/4), moist medium 50
<br /> plasticity, approximately 30%fines, 70%sand Bentonite
<br /> 55 55
<br /> 60 --- -----------------------o---------- 60
<br /> SM SILTY SAND(SM) moist, approximately 20 /o low plastic
<br /> fines, 80% fine-to medium-grained sand
<br /> 65
<br /> SC CLAYEY SAND(SC) dark yellowish brown (10YR 4/3),
<br /> moist, medium plasticity, approximately 40% fines, 60%
<br /> 70 fine-grained sand, easy drilling 70
<br /> Gravel
<br /> 75 --- ---------------------------------- 75
<br /> SP-SM POORLY GRADED SAND WITH SILT(SP-SM)moist, filter pack
<br /> _approxim_ately 10_%_fin_es,_90%_fin_e-t_o_m_ediu_m-grain_ed_sand
<br /> __
<br /> 80 SP POORLY GRADED SAND(SP)very dark grayish brown 80
<br /> (10YR 3/2), mostly medium-grained sand, < 5% fines, some
<br /> cemented sand (weak to moderate), < 5% gravel
<br /> Drilling Company:: Technicon Date Started: 8/4/2009 Time Started: 7:15am
<br /> 9 P Y
<br /> Drilling Method: Hollow Stem Auger Date Completed: 8/4/2009 Time Completed: 12:00pm
<br /> Boring Diameter: 8 in Elevation (ft): 252.087 Total Depth (ft): 92
<br /> Logged By: Kristin Sample, PE Groundwater Level: NFWE
<br /> Sampling Method: Grab from cuttings
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