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MONITORING WELL LOG PROJECT NAME: Stockton Metro Airport LOG OF WELL BORING: MW-4 SITE ADDRESS 5000 S Airport Way BOREHOLE DIAM. (in) g Stockton, California MONITORING WELL DIAM. In 2 DATE STARTED May 30, 2007 DRILLER/COMPANY: Jason Neff DATE COMPLETED: May 30,2007 GreggDrillin C-57#656407 DRILLING METHOD: Marl M-11 Hollow Stem Auger GEOLOGIST/ENGINEER. R. David Smith, R.G.#6886 Split Spoon Sampler Ramage Environmental 0 U r � LL r W IX J U- 2 N n a m 1n m cOC x wo o Q N a rn m a in z N DESCRIPTION W 0 0 fill Asphalt,3-inches,underlain by base to 1 feet Hand cleared to 5 feet. 0 CLAY WITH SILT: Dusky yellowish brown,moist,stiff,medium plasticity CL 5 39 5 Unit becomes pale brown to brownish gray,zones of whitish caliche e ' SILT WITH CLAY: Pale yellow+sh brown,slightly moist,stiff,zones of whitish caliche. 10 10 ML e y 3.6 „ Unit becomes moderate yellowish brown,moist.medium stiff. 15 15 ,e SM SAND WITH SILT: Moderate brown,moist,medium dense,fine sand,10%sill is 3 5 MW-4-20 SILT WITH CLAY: Palo brown to brownish gray,moist,stiff. 20 ML 20 23 7 SILTY SAND: Brownish gray,very moist,medium dense,grades 60 to 80%fine to very e3.9 SM fine micaceous sand.20 to 40%silt,zones of iron(Fe)staining 25 25 z7 CLAYEY SILT: Light brownish gray to light olive gray,moist,medium stiff.zones of whitish caliche. a 58 9 30 30 4 Unit becomes moderate yellowish brown to dark yellowish brown,stiff. ' 6.2 as 35 SILT: Moderate brown,moist,medium stiff,grades from having trace clay to trace fine 35 micaceous sand ML .o " 42 u 40 4+ 40 SILT WITH CLAY: Pale brown to brownish gray,moist,stiff,zones of whitish caliche Static groundwater measured at 43 45 feet bgs on 6/27/07 ,s 4.7 MW-4-45 45 45 V Saturated soil encontered at 47 feet bgs, 5/30/07 47 SANDY SILT: Moderate brown.wet to very moist,micaceous e e 1 8.1 1 11 11 SILT WITH SAND: See next page. 49 Page 1 of 2