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Mr Mike Infurna <br /> C A M B R I A May 31, 2005 <br /> Groundwater Conditions <br /> Maximum historical TPHg concentration 5,300 gg/L(C-2, 812211996) <br /> Maximum TPHg concentration(current) 74 gg/L (C-1) <br /> Minimum TPHg concentration(current) <50 gg/L <br /> Maximum historical benzene concentration 100 gglL(C-2, 411711992) <br /> Maximum benzene concentration (current) <0 5 gg/L <br /> Minimum benzene concentration (current) <0 5 gg/L <br /> Maximum historical MTBE concentration 2,100 gg/L(C-2,08/22/1996) <br /> Maximum MTBE concentration(current) 66 gg/L (C-1) <br /> Minimum MTBE concentration(current) <0 5 gg/L <br /> Hydrocarbon Trends and Distribution <br /> No benzene has been reported in any well during the past three quarters TPHg is only reported in C-1 <br /> at 74 gg/L Methyl tert-butyl ether(MTBE)was detected in monitoring wells C-1 and C-2 at 66µg/L <br /> and 10 pg/L, respectively <br /> ANTICIPATED THIRD QUARTER 2005 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 /> • Cambria will submit a workplan for further groundwater delineation <br /> i <br /> 2 <br />