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Site History Canepa's Car Wash(Pacific Avenue) Page 7of7 . increased relative to historic data, consistent with the trend of increasing contaminant concentrations in that well Condor continued to conduct remediation system planning and permitting activities during early part of the first quarter of 2004 Condor conducted second quarter 2004 groundwater monitoring activities at the site on May 7, 2004 Monitoring wells MW-1 — MW-7, and 1\4W-9 — MW-12D were measured for water level Monitoring wells MW-1, MW-2, MW-3, MW4, MW-9, MW-11, and MW-12D and SVE well SV-4 were sampled during the event, consistent with the quarterly schedule Groundwater elevation data and laboratory analytical results were generally consistent with historic groundwater monitoring data The concentrations of MTBE and other gasoline oxygenates in MW-3 decreased relative to historic data Through the first quarter of 2004, the trend has been one of increasing MTBE concentrations in that well Condor continued to conduct remediation system planning and permitting activities during the second quarter of 2004 Condor conducted annual groundwater monitoring activities during the third quarter 2004 at the site on July 22 and 23, 2004 Depth to water measurements and groundwater samples were collected from monitoring wells MW-1 through MW-7, MW-9 through MW-12D and SVE well SV-4 Laboratory analytical results of the groundwater samples indicated that concentrations of petroleum hydrocarbon constituents were generally consistent with historical data Contaminant concentrations in the sample collected from MW-3 increased relative to the previous monitoring event and consistent with an increasing trend for MTBE in that well Groundwater elevation data indicated a northeast groundwater gradient generally consistent with historic groundwater gradients The SVE system continued to be out of service to allow for modifications to the system and property development, and has not been sampled since December 19, 2002 In a letter dated October 17, 2003, SJCEHD approved the RAP submitted by Condor dated March 3, 2003 Condor is currently conducting installation of the treatment systems and anticipates start-up of the systems in October 2004 Condor conducted groundwater monitoring activities during the fourth quarter 2004 at the site on October 14, 2004 Depth to water measurements were collected from monitoring wells MW-2 through MW-7, MW-8 through MW-10, MW-12D, and SVE well SV-4 Groundwater samples were collected from monitoring wells MW-2 through MW-4, MW-9, MW-12D, and SVE well SV-4 Laboratory analytical results of the groundwater samples indicated that concentrations of petroleum hydrocarbon constituents were generally consistent with historical data Contaminant concentrations in the sample collected from MW-3 increased relative to the previous monitoring event and are consistent with an increasing trend for MTBE in that well Groundwater elevation data indicated a northeast groundwater gradient generally consistent with historic groundwater gradients The SVE system was returned to service on November 1, 2005 after modifications to the system and property development P 11000_prj11707 Canepa11707D Groundwater Momtonng\Reports\Reports12005 QMR12005 1st gtr\appendix\BCanepa's SITE HISTORY doc