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Tireajek - CRA TMOOMPANY <br /> _ VON WELL CONSTRUCTION LOG <br /> PROJECT NUMBER 328-40 WELL NUMBER MW-15 <br /> PROJECT NAME Former Chemical Distribution Facility DATE DRILLED on 996 <br /> LOCATION 1904 W.Charter Way. Stockton, CA CASING TYPEIDIAMETER Sch 40 PVC 4" <br /> DRILLING METHOD 10" HSA/18"Mud Rot. SCREEN TYPE/SLOT 4" PVC Sch 40/0.020 <br /> SAMPLING METHOD Split Spoon GRAVEL PACK TYPE Silica Sand <br /> GROUND ELEVATION 4.39 feet (smell Datum: U.S.C. &G.S. GROUT TYPE/GUANTITY Portland Cement <br /> TOP OF CASING 4.11 feet DEPTH TO WATER 12.41 feet <br /> LOGGED BY R.T. Sieofried GROUND WATER ELEVATION -8.02 feet <br /> REMARKS Borehole Location: See Plan: Weather: Sunny, warm <br /> 0 <br /> C O <br /> o U <br /> o m 0 0 f x rs i LITHOLOGIC DESCRIPTION a m = WELL DIAGRAM <br /> y U R <br /> N 0 <br /> SM CLAY, SILT and SAND with some rock fragments, <br /> brown, soft, damp to moist,assorted debris,mottled 0930 <br /> (Fill) (4-3-96)-Starts <br /> Drilling Pilot <br /> Borehole with <br /> 6" HSA <br /> 0 <br /> 12 10 5 5 <br /> 0.2 <br /> -5 <br /> 26 BO 70 1 12.75"OD <br /> 1,2 SAND-gray brown, loose, wet, fine grained Steal Casing <br /> ML SILT-gray brown, dense, moist <br /> - - -- - - ' -- - ------ ---- --- <br /> SP SAND-gray brown, compact,moist,medium grained <br /> -10 <br /> 58 80 15 15 <br /> 1.2 ML SILT with clay,olive green,hard,moist II 18" Dia. Mud <br /> RotaryDrilled <br /> Borehole <br /> SP SAND-greenish gray, compact, wet,fine grained <br /> -15 <br /> 22 80 20 2 <br /> 1.2 <br /> CL Nk CL CLAYEY SILT/SILTY CLAY-brown,very hard, <br /> saturated <br /> 20 <br /> 98 90 25 —25- <br /> 1.3 <br /> 1615 <br /> (4-3-96)-18" <br /> Borehole <br /> Drilled to 30 ft <br /> 25 bgs <br /> 74 60 30 3 1655-12.75" <br /> W0.9 ......................................................................................................................... OD Casing <br /> CL Becoming Greenish Driven to 33 ft <br /> e bgs <br /> a 1735-Outer <br /> i <br /> U - - - - - - - -- - - - - - - - -- Annulus <br /> ML CLAYEY SILT-blue gray, hard, saturated -30 Grouted <br /> 3 35 <br /> PAGE 1 OF 3 <br />