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C <br />Vector Engineering, Inc. <br />143E Spring Hill Drive <br />Grass Valley, CA 95945 <br />Telephone: 530-272-2448 <br />Fax: 530-272-8533 <br />WELL NUMBER: - <br />102 <br />Page 1 of 2 <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 />Cn <br />0 <br />J <br />o <br />j <br />a <br />Material Description <br />Well Diagram <br />co <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 % tines, <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 />10 <br />Gravel <br />10 filter pack <br />a•a' <br />- brown (10YR 4/3), approximately 10 % low plastic fines, 60 % <br />Bentonite <br />fine- to coarse-grained sand, 30 % gravel <br />15 <br />SW -SC <br />;:;:; • • <br />WELL GRADED SAND WITH CLAY AND GRAVEL <br />20 <br />(SW-SC), brown (10YR 4/3), moist, approximately 10 % low- <br />to medium -plasticity fines, 75 % fine- to coarse-grained sand, <br />20 <br />15 % gravel (up to 3/4 in., subrounded) <br />25-- <br />.8.8. <br />25--: <br />- 50 % gravel (up to 1.5 -in., subrounded), 50 % fine- to <br />30Gni <br />° <br />coarse-grained—a_nd------------- <br />30 <br />° 00 <br />--------- <br />SILTY GRAVEL WITH SAND (GM) very dark brown <br />o 0 <br />grayish <br />(10YR 3/2), approximately 40 % gravel (up to 3 in, <br />Gravel <br />35 <br />0 00 <br />subrounded), 30 % sand, 30 % fines, difficult drilling <br />35--:' filter pack <br />SP -SM <br />:::':: '.::.' <br />____ ___________________________ <br />SAND WITH SILT (SP -SM) very dark grayish brown (10YR <br />40 <br />moist, fine-grained_dark_lithic_san_d <br />_ _ _ <br />'X z X XX <br />X' <br />X X <br />_3/2), <br />SILTSTONE, laminated_(1_mm) alternating light and dark <br />ao : <br />45 <br />X X X X <br />X X X X <br />bands <br />XXXX <br />45 <br />X x x x <br />SANDSTONE, brown, moderately cemented, very fine <br />50 <br />:: <br />grained <br />50 <br />1-4 Bentonite <br />55 <br />___ <br />SP -SM <br />:::::':: <br />.`::':.::.' <br />--- <br />SAND 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 />--- <br />. . <br />A <br />------- <br />SANDSTONE, brown, moderately cemented, very <br />65 ... • . . <br />= <br />fine-grained <br />70 <br />70 : <br />75 <br />black sandstone <br />75 '-' <br />80 <br />80 :. <br />Drilling Company: PC Exploration/Westex <br />Date Started: 7/29/2009 Time Started: 12:55pm <br />Drilling 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 />