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0 0 <br /> Section 3 Groundwater Monitoring Well Installation <br /> 3.6 WELL DISINFECTION <br /> It has been ECO:LOGIC's experience that the effectiveness of well disinfection procedures vary. <br /> As such, the proposed monitoring wells will not be disinfected unless monitoring results indicate <br /> persistently elevated densities of coliform organisms present over three consecutive quarters of <br /> groundwater monitoring. <br /> 3.8 SURVEYING <br /> The location of each well will be surveyed and located according to the California State Plane <br /> Coordinate System, 1983 horizontal datum. The elevations of the north quadrant of the PVC <br /> well casing will be surveyed to within 1/100d'of a foot accuracy relative to NGVD29 datum. <br /> Adjacent ground surface will also be surveyed for reference. <br /> Care shall be exercised during surveying to avoid introduction of foreign material into the well. <br /> Rod or receiver bottoms shall be wiped with a chlorine solution prior to setting on well casing <br /> for each well. <br /> May 2006 Main Stone Property <br /> 34 Effluent Storage and Disposal Site Hydrogeologic Investigation Workplan <br />