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Marley Cooling Tower Log of Boring It. TW-4 <br /> Drie Method: Rotary Sonic Boring Location:Stockton,CA <br /> Drilling Equipment: Sonic <br /> Drilling Contractor: Resonant Sonic International Elevation(Ground Surface): TBD <br /> Sampling Method: Continuous Core Elevation (Top of Casing): 28.59 <br /> Sample Interval Depth to First Water(ft. bgs): 59.64 a <br /> Borehole Diameter: 6.625 inches Depth to Static Water(ft. bgs): 59.46 <br /> Borehole Total Depth:85 feet Monitoring Well Construction <br /> Date Started: 5/30/03 Type of Surface Seal: Concrete <br /> Date Completed: 5/31/03 Blank Casing Type/Size: SCH 40 PVC, 2-in ID Top of Screen(ft.bgs): 60 ft. bgs. <br /> Logged By: Tony Mikacich Screen Type/Size: SCH 40 PVC, 2-in ID Bottom of Screen(ft.bgs): 85 ft.bgs. <br /> Screen Slot Size: 0.020 inch Type of Sand Pack: #3 <br /> V <br /> w r = P w Well <br /> v rc 0 ia n o Soil Description <br /> y n 1 m o a E e Construction <br /> ° " E <br /> > 3 m ° c ¢ g rn <br /> m m <br /> .2 <br /> 0 Grabs <br /> thick, road base material-6"thick, 6 to 8 inch thick <br /> hand angered to 5 ff. bgs.to clear utilites. concrete pad <br /> with traffic <br /> CL:Sandy IClay,dark brown(10YR3/3),25%fine sand, % rated vault <br /> 5 medium plasticity. <br /> SM:Silty Sand some clay,yellow brown(10YR5/6), moist, <br /> 10 fine sand,20%silt, 10%clay, loose. <br /> 10 <br /> 5 -15 No additional soils collected during the drilling of TW-4. <br /> D -20 ' 2-inch diameter <br /> Schedule 40 <br /> Dark oily substance coming out of borehole. Floating on top PVC blank <br /> of return water. Consistency of motor oil. Approximate / <br /> 5 -25 volume 50mL. Collected 3 nonpreserved VOAs at 1432 <br /> hours. <br /> 0, <br /> D -30 <br /> 1� <br /> As above noticed by driller. <br /> 5 -35 <br /> D -40 % Type II/III <br /> a Portland Neat <br /> Cement <br /> 5 -45 <br /> I <br /> D 0 <br /> Project No. 3850244.020101 Log of Boring: TW-4 <br /> © M W H Page 1 of 2 <br />