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' Site History Canepa's Car Wash(Pacific Avenue) Page 9 of 9 been removed from the groundwater during the third quarter of 2005 and approximately 160 pounds of gasoline since the pump and treat system was placed in operation on November 1, 2004 The soil vapor extraction system removed approximately 96 pounds of gasoline from the soil during the third quarter of 2005 and approximately 9,856 pounds of petroleum hydrocarbons since the SVE system was placed in service on November 1, 2004 Fourth quarter 2005 monitoring activities were conducted on October 13, 2005, and September 12, 2005 Field observations were made at the 11 site monitoring wells (MW-1 through MW-7 and MW-9 through MW-12D) and one soil vapor extraction well (SV4) on October 13, 2005 Groundwater samples collected from the monitoring wells indicated that none of the constituents of concern were detected at or above the laboratory reported detection limits in monitoring wells MW-4, MW-9, and MW-12D All other ' measurements and laboratory data were generally consistent with previous quarters and trends with the exception of EDB and MTBE The concentration of MTBE at MW-3 was the highest ever detected at the monitoring well since monitoring began in August of 1996 EDB was detected for the first time at the Site Iin MW-1 Groundwater samples collected from the SVE wells (SV-1 through SV-9) on September 12, 2005 and from SV4 on October 13, 2005, indicated that concentrations of BTEX, MTBE, or TPH-G were detected at or above the laboratory detection limits in all the wells,which is consistent with historic results for those wells The system operated approximately 1,449 7 hours between July 29, 2005 and October 31, 2005, which is 63% of the time The system had been in operation for a total of 4,418 7 hours since it began operating (November 1, 2004) through October 31, 2005 The groundwater treatment system removed petroleum hydrocarbons from approximately 354,033 gallons of groundwater during the fourth quarter of 2005, and a total of approximately 1,059,346 gallons had been treated by the system as of October 31, 2005 The average groundwater pumping rate between July 29, 2005 and October 31, 2005, was approximately 3 96 gallons per minute Condor estimated that approximately 66 63 pounds of gasoline had been removed I from the groundwater during the fourth quarter of 2005 and approximately 221 3 pounds of gasoline since the pump and treat system was placed in operation on November 1, 2004 The soil vapor extraction system removed approximately 289 3 pounds of gasoline from the soil during the fourth quarter of 2005 and approximately 10,145 4 pounds of petroleum hydrocarbons since the SVE system was placed in service on November 1, 2004 Condor replaced the groundwater extraction pump used in MW-I in late December 2005 P 11000_M\1707 Canepa117071'Canepa Pacific\Repoib\QMR1200611st gti\Appeadix\BCanepa's SITE HISTORY dof-