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MONITORING WELL LOG <br /> PROJECT NAME Former RINO Service Station LOG OF WELL MW-$ <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 ril 16,2005 Mitchell Drilling C-57#672617 <br /> DRILLING METHOD Hollow Stem Auger GEOLOGISTIENGINEER R David Smith R G <br /> SpIft-spoon Sam ler Ramage Environmental <br /> o 0 <br /> LL <br /> = F— E <br /> m to a <br /> iL im Va o H <br /> 0_ n N a U U IL <br /> a in cn a N z DESCRIPTION o <br /> 0 RII Asphalt surface(3-inches) Hand cleared to 5 feet <1 0 <br /> SILTY SAND Dark yellowish brown moist medium dense 80%poorly <br /> SM graded fine micaceous sand 20%silt <br /> 8 <br /> 12 00 <br /> 43 <br /> 5 5 <br /> I <br /> 11 g � <br /> 14 28 POORLY GRADED SAND Moderate yellowish brown moist medium <br /> 13 <br /> 10 dense grades fine to medium micaceous 10 <br /> sand trace silt <br /> I <br /> 12 SP- Thin(1 5-inch)clay tense at 13 feet <br /> 14 1 S 1 MW-8.15 SM <br /> 17 <br /> 15 Unit grades to very fine sand at 15 feet 15 <br /> Static groundwater at 18 85 feet bgs on 4/25/05 <br /> 12 Unit becomes very moist to wet at 19 feet <br /> i 5 265 MW-8-20 Saturated sol/observed at 19 feet bgs on 4/16/05 2tr <br /> 12e <br /> 20 CL SILTY CLAY Pale to dark yellowish brown very moist medium stiff 20 <br /> low piashcity <br /> 23 <br /> 10 POORLY GRADED SAND Variegated wet medium dense clean <br /> 10 1124 MW-8-25 medium micaceous sand <br /> 11 <br /> 25 25 <br /> SP <br /> 6 <br /> s N R 30' <br /> ' 30 30 <br /> Terminated boring at 30 feet Installed 2-inch diameter pvc monitoring well <br /> Well Screen(0 020-inch slot)from 13 to 28 feet(heaving sand lifted well 2 feet) <br /> Filter pack of#3 Sand from 11 to 28 feet <br /> Surged and purged well prior to placing bentonite <br /> 35 Hydrated bentonite chips from 9 W 11 feet 35 <br /> Neat cement from 1 to 9 feet <br /> Completed well with water-tight cap and 8--in dram street box set in concrete <br /> Page 1 of 1 <br /> I <br />