Laserfiche WebLink
k4 KLEINFELDER <br /> • advanced near the sites eastern boundary, west of Kaiser Road. The boring location is <br /> shown on Plate 2. <br /> 3.2.1. CONDUCTOR CASING <br /> • Installed: January 31, 2006 <br /> • Drilling method: Solid flight auger <br /> • Drill Hole Diameter: 24 inches <br /> • Surface Casing: 24 inch diameter <br /> • Depth Set: 6 feet bgs. <br /> 3.2.2. TEST BORE DRILLING <br /> • Dates: January 31, 2006 to February 9, 2006. <br /> • Drilling Method: Direct mud rotary <br /> • Total Depth: 400 ft bgs <br /> • Pilot Hole Diameter: 7 7/8-inches <br /> • Drilling Fluid: Bentonite based drilling Fluid <br /> • Lithologic Sampling Interval: 10 feet <br /> • 3.2.3. GEOPHYSICAL LOG <br /> Dewey Data, of Acampo, California conducted geophysical logging of the exploratory <br /> boring on February 2, 2006. The purpose of the geophysical logging was to record <br /> selected geophysical characteristics of the subsurface formation to aid in assessing <br /> potential water-producing zones within the borehole. The logs included spontaneous <br /> potential, resistivity (short normal and long normal) and Gamma Ray. On the basis of <br /> Kleinfelder's geologist's review and interpretations of the completed logs, three potential <br /> water-bearing zones were selected for collecting groundwater samples. <br /> 3.2.4. BOREHOLE ZONE CONSTRUCTION <br /> Kleinfelder identified three zones for individual pumping and testing based on our <br /> interpretation of lithologic and geophysical logs. Each zone had an individually <br /> constructed temporary well screen and casing placed within the zone identified for <br /> testing. The zones were pumped until clear of drilling fluid and sand production <br /> diminished. Water quality parameters such as pH, Electrical Conductivity (EC), turbidity, <br /> and temperature were also monitored during the pumping of each zone to further identify <br /> the stable condition prior to collecting a sample for laboratory analysis. <br /> • Kleinfelder finalized the temporary well design for each zone based upon our field <br /> observations, assessment of the lithologic and geophysical logging. The test well <br /> zone(s) construction specifications are presented below. <br /> Page 10 of 20 <br /> 63138.H01/ST06R312/JDZ:Iv April 7, 2006 <br /> ©2006 Kleinfelder, Inc. <br />