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PROJECT: HANSON PROPERTY <br /> 7750 Schulte Road Log of Well No. TW-1 <br /> Tracy, California <br /> BORING LOCATION: Approximately 5 feet to the east of S13-2 ELEVATION AND DATUM: <br /> DRILLING CONTRACTOR: Gregg Drilling and Testing, Inc. DATE STARTED: DATE FINISHED: <br /> 6/13/97 6/13/97 <br /> DRILLING METHOD: Hollow stem auger(HSA) TOTAL DEPTH: SCREEN INTERVAL: <br /> 25 feet b s 13-25 feet b s <br /> DRILLING EQUIPMENT: Rhino rig DEPTH TO FIRST COMPL. CASING: <br /> WATER: 18 feet bgs 14.12 feet bgs 2-inch diameter Sch.40 PVC <br /> SAMPLING METHOD: 4-foot continuous core barrel LOGGED BY: <br /> M. Ledesma <br /> HAMMER WEIGHT: --- DROP: --- RESPONSIBLE PROFESSIONAL: REG.NO. <br /> D.Zemo CEG 1747 <br /> _ ^ SAMPLES DESCRIPTION <br /> (D d m m E NAME(usCS Symbol):color,moist. by weight.,plast.. WELL CONSTRUCTION DETAILS <br /> uj`— E z E o 65 MA consistency,structure,cementation,react.w/HCI.geo.inter. AND/OR DRILLING REMARKS <br /> in U) m t` o <br /> Surface Elevation: --- <br /> 0 LEAN CLAY with SAND (CL) 12-inch diameter <br /> Dark grayish brown (2.5Y 4/2), moist, 80%fines, traffic-rated well box <br /> 771 <br /> 1 15%fine to medium sand, 5%fine subangular >01 2-inch diameter <br /> )01 <br /> gravel, low to medium plasticity, firm locking expansion <br /> XX cap <br /> XX2 <br /> 8 1/4-inch diameter <br /> borehole <br /> 3 <br /> 2-inch diameter <br /> Sch.40 PVC blank <br /> 0 LEAN CLAY (CL) casing <br /> 4 Olive brown (2.5Y 4/4), moist, 90%fines, 10%fine <br /> o sand, medium plasticity, soft <br /> 5 19 <br /> 7 Basalite Type 1/II <br /> cement grout(with <br /> 6 approximately <br /> 5%bentonite powder) <br /> 0 <br /> 7- <br /> 8- 0 <br /> SILT (SM) <br /> Olive brown (2.5Y 4/4), moist, 90%fines, 10%fine <br /> 9 sand, non plastic, soft <br /> 10 <br /> LEAN CLAY (CL) <br /> Olive brown (2.5Y 4/4), moist, 95%fines, 5%fine 3/8-inch bentonite <br /> 11 sand, medium plasticity, soft pellets <br /> 0 <br /> 12 No.2/16 RMC <br /> Lonestar filter pack <br /> sand <br /> 13- <br /> 2-inch diameter <br /> 14 Increased moisture content Sch.ao PVC <br /> 0.02-inch slotted <br /> well screen <br /> 0 <br /> 15 w-t(12/95) <br /> Project No. 4097.01 Geomatrix Consultants Figure -- <br /> 4097.005 <br />