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0 KOPPEL-STOCKTON TERMINAL <br /> MONITORING WELL INSTALLATION WORK PLAN <br /> with the property owner before well installation.For this work plan,it is assumed the <br /> surface completion will consist of a 12-inch diameter,traffic-rated flush mount sealed with <br /> concrete. The well will be locked with standard Master locks.Following completion,the top <br /> of casing and ground surface elevations will be surveyed to the 1988 North American <br /> Vertical Datum. <br /> 4.0 Well Development <br /> The surge-and-bail method will be used for initial development of the monitoring well until <br /> water quality characteristics stabilized.The well will be surged for at least 15 minutes and <br /> then bailed for 30 minutes.Once bailing is complete,the well will be pumped until <br /> successive samples show stabilization of pH within 0.5 unit,temperature within 1 degree <br /> Celsius and conductivity within 10 percent. Field parameters,purge volume,and water <br /> levels will be recorded on well development logs. <br /> 5.0 Schedule for Well Installation and Sampling <br /> The area north of Sonora Avenue is seasonally wet,and the location will be difficult to <br /> access during the winter and early spring. Therefore,monitoring well KP-10S will be <br /> installed in early summer 2005 once the area has dried and the location is accessible by a <br /> drill rig. <br /> Well KP-10S will be monitored semi-annually for one year in accordance with RWQCB <br /> Monitoring and Reporting Program(MRP)Number R5-2004-0835,dated November 10, <br /> 2004. Following one year of semi-annual monitoring,the monitoring frequency will be <br /> reduced to an annual basis. The schedule for well installation and sampling is presented in <br /> Table 1. Commencing with the 2006 annual monitoring event,well KP-10S will be sampled <br /> on an annual basis concurrent with the annual sampling at other site wells. <br /> As required by the MRP,groundwater samples collected from KP-10S will be analyzed for <br /> nitrate as nitrogen and ammonia/ammonium.Field parameters will also be recorded <br /> during semi-annual and annual sampling events at this well. <br /> TABLET <br /> Schedule for Drilling,Installing,and Sampling Monitoring Well KP-10S <br /> Monitoring Well Installation Work Plan,Koppel Stockton Terminal,Stockton,California <br /> Month and Year Activity <br /> June 2005 Install KP-10S <br /> October 2005 Sample KP-1 OS as part of the 2005 annual sampling event <br /> April 2006 Sample KP-10S <br /> October 2006 Sample KP-10S as part of the 2006 annual sampling event <br /> RDDI:WO184VREPORTS\2DD4_MONITORINGWELLWP@004_MWELLWP.DOC 3 <br />