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_ ------- .............. ........_...... <br /> Material description for rock samples include,as appropriate: <br /> • Classification <br /> • Lithologic Characteristics <br /> • Bedding/Banding-Characteristics <br /> • Color <br /> • Hardness <br /> • Degree of Cementation - - - - <br /> • Texture <br /> • Structure and Orientation <br /> • Degree of Weathering <br /> • Solution or Void Conditions <br /> • Primary and Secondary Permeability <br /> • Sample Recovery <br /> • Incidental odors <br /> • PID readings <br /> • Staining <br /> We11 Construction <br /> After the hole is drilled and logged,backfill hole as required for proper screen/sump <br /> placement. <br /> In unconfined aquifers where floating product and/or tidal fluctuation is anticipated,the <br /> screen will extend 2 feet above the water table. If feasible,the bottom of the screened <br /> section will rest at or just below the top of the aquitard. The 2-foot length of plugged <br /> riser section will be in place below the screen,if a sump is required. <br /> • The installation of monitoring-wells in uncased or partially cased holes will.begin <br /> within.12 hours of completion of drilling, or if the hole is to belogged, within 12 <br /> hours of well logging, and.within 48 hours for holes fully cased with temporary drill. <br /> Page 5 of 9 <br /> wellinstall_SOP MONITORING WELL INSTALLATION- February 2005 <br />