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Mr <br /> *CAM B R i A December1 s 2005 <br /> Maximum Groundwater Concentrations <br /> Maximum historical TPHg concentration 5,300 µg/L(C-2, 8/22/1996) <br /> Maximum historical benzene concentration 100 gg/L(C-2,4/17/1992) <br /> Maximum historical MTBE concentration 2,100 }Lg/L(C-2,0812211996) <br /> Current Groundwater Concentrations(10131/05) <br /> Well ID TPHg Benzene Toluene Mhy1 Xylene MTBE <br /> benzene <br /> C-1 <50 <0 5 <0 5 <0 5 <0 5 3 <br /> C-2 <50 <0 5 <0 5 <0 5 <05 13 <br /> C-3 <50 <0 5 <0 5 <0 5 <0 5 <0 5 <br /> i <br /> Hydrocarbon Trends and Distribution <br /> No benzene has been reported in any well since August 2000 No TPHg was reported in any site well <br /> above laboratory detection hunts this quarter Methyl tertbutyl ether (MTBE) was detected in <br /> monitoring wells C-1 and C-2 at 3 lig/L and 13 gg/L,respectively <br /> SAMPLING REDUCTION REQUEST <br /> No hydrocarbons have been reported in monitoring well C-3 since February 1994, and MTBE has <br /> only been reported in December 2000,January 2002 and April 2004 Therefore,Cambria requests to <br /> discontinue sampling of monitoring well C-3,but will continue monitoring the well quarterly <br /> ANTICIPATED FIRST QUARTER 2006 ACTIVITIES <br /> • G R will collect groundwater samples from the site groundwater monitoring wells and <br /> prepare a monitoring report, <br /> • Cambria will prepare a quarterly status report,and <br /> • Upon receipt of access agreements, Cambria will proceed with obtaining the proper <br /> drilling permits and install the sn�l borings_with depth discrete groundwater samples for <br /> ,. vertical and lateral groundwater delineation <br /> 2 <br />