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Well Location: Drilling Contractor: Precision Samping, Inc <br /> Northern California Youth Correction Center Lead Driller: Paul Draeger <br /> Stockton, California Drilling Dates: November 13-17,2008 <br /> • steel bollards(3) <br /> Top of Steel Cover: 40.6 Top of Steel Cover: +3.4 <br /> Top of Casing: 40.0 Top of Casing: +2.80 <br /> r <br /> weep hole :+ Lock installed: es no <br /> Ground Surface <br /> Elevation: 37.2 Ground Surface: 0.0 <br /> ::;..:. <br /> Borehole Diameter: 8 inch <br /> ' .. Centralizer(s): Every 20 feet <br /> Top of Annular Seal: 37.2 s • Top of Annular Seal: 0.0 <br /> Type of Annular Seal: <br /> Quikrete Portland Cement Slurry <br /> Grouting Method: Tremie <br /> Grout Thickness: 111.5 feet <br /> Elevation values,in feet Depth values,in feet above(+) Casing Material: Schedule 80 PVC <br /> above Mean Sea Level or below(-)Ground Surface <br /> Casing Diameter: 2-inch <br /> • Casing Length(including Screen): <br /> Elevation of Groundwater: -28.68 Depth to Groundwater: -65.88 139 feet <br /> Date of Groundwater Measurement: <br /> 12/8/2008 <br /> Top of Bentonite Seal: -74.3 Top of Bentonite Seal: - 111.5 <br /> 0 0 <br /> Type of Bentonite Seal: <br /> Pel-Plug Bentonite Pellets <br /> 0 0 <br /> ° <br /> Top of Sand Pack: -78.47 ° Top of Sand Pack: -115.67 Bentonite Seal Thickness: 4.17 feet <br /> Type of Sand Pack: <br /> Top of Screen: -81.8 Top of Screen: -119.0 2/12 Lapis Lustre Sand <br /> Sand Pack Thickness: 3.33 feet <br /> Number of Bags of Sand: 8 <br /> Screen Slot Size: 0.01 inch <br /> Screen Material: Schedule 80 PVC <br /> Screen Diameter: 2-inch <br /> Screen Length: 20 feet <br /> Bottom of Screen: - 101.8 Bottom of Screen: -139.0 Depth of Borehole Backfill: N/A <br /> Collapse Footage: N/A <br /> Total Depth: - 101.8 Total Depth: -139.0 <br /> • (Not to Scale) ©Forward, Inc.(2009) <br /> 4630 South Highway 94 <br /> North Outer Road <br /> St.ChaAustin Rd Landfill AMW-13B <br /> Charles,Missouri 63304 <br /> Phone(636)939-9111 <br /> Fax(636)939-9757 Manteca California As-Built Diagram <br /> HERST & ASSOCIATES, INC.- ' <br />