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MONITORING WELL LOG <br /> PROJECT NAME Former RINO Service Station LOG OF WELL MW-8 <br /> SITE ADDRESS 1001 E Yosemite Avenue BOREHOLE DIAM (in) 8 <br /> Manteca,California WELL DIAM in 2 <br /> DATE STARTED April 16 2005 DRILLER/COMPANY Miguel Ce)a <br /> DATE COMPLETED Aril 16,2005 Mitchell Drilling(C-57#672617) <br /> DRILLING METHOD Hollow Stem Auger GEOLOGIST/ENGINEER R David Smith R G <br /> Split-spoon Sam ler Ramage Environmental <br /> J <br /> O C w+ <br /> CD ra o N <br /> w p <br /> F� m io a a m LU <br /> r!1 c H <br /> t0. E 3CL <br /> U cg 0_ <br /> 0 in m o-z (0 � DESCRIPTION 0 <br /> 0 fill Asphalt surface(4-inches) Hand cleared to 4 feet <1 0 <br /> SANDY SILT Dark yellowish orange slightly moist,stiff 55%silt 45% <br /> ML well graded very fine to medium sand <br /> e <br /> 12 005 <br /> 13 k-1,' <br /> 5 SM SILTY SAND Moderate yellowish brown slightly moist dense 70% 5 <br /> well graded tine to medium sand 30%silt <br /> B <br /> 11 POORLY GRADED SAND Pale yellowish brown slightly moist, <br /> 1i <br /> 28 medium dense grades fine to medium <br /> 13 <br /> 10 micaceous sand 10 <br /> i <br /> 12 <br /> 14 181 MW-8-15 SP <br /> n <br /> 15 15 <br /> 12 Stabc groundwater at 19 40 feet bgs on 4125/05 <br /> 15 265 MW-8-20 <br /> 20 2s Saturated soil observed at 21 feet bgs on 4/16/05 20 <br /> 10 <br /> 70 1124 MW-8-25 25 <br /> 11 <br /> 25 CLAY Dark yellowish brown very moist to wet medium stiff medium 25 <br /> plasticity <br /> CL <br /> e <br /> a <br /> NR 31 <br /> 30 30 <br /> Terminated boring at 30 feet Installed 2-inch diameter pvc monttortng well <br /> Well Screen(0 020-inch slot)from 15 to 30 feet <br /> Filter pack of X13 Sand from 12 to 30 feet <br /> Surged and purged well prior to placing bentonite <br /> 35 Hydrated bentonite chips from 9 to 12 feet 35 <br /> Neat cement from 1 to 9 feet <br /> Completed well with water tight cap and 8-in diam street box set in concrete <br /> Page 1 O 1 <br />