Laserfiche WebLink
samples from the other wells No other oxygenates were detected in the <br /> • <br /> samples <br /> The SVE system was taken out of operation after the July 23, 2004 monitoring <br /> event in order to repair the system and to simultaneously go into the non- <br /> operational timeframe of the "pulsed" mode operation Pulsed operation can <br /> allow soil vapor concentrations to rebound during the intervals of non- <br /> operation <br /> IThe August 2004 quarterly groundwater-monitoring event indicated that the <br /> groundwater elevation decreased approximately 173 feet from the previous <br /> event performed in April 2004 During this event, the average depth to <br /> groundwater was 29 46 feet bgs (-19 69 feet msl) The groundwater flow <br /> direction was easterly at a gradient of approximately 0 006 feet per linear foot <br /> BTEX and TPH-g concentrations increased in well MW-2, presumably due to <br /> the air sparging/soil venting system being temporarily out of service BTEX <br /> and TPH-g concentrations were not detected in the samples collected from <br /> wells MW-1, MW-3, or MW-4 The oxygenate TBA was detected in well <br /> MW-2, but was not detected in the samples from the other wells No other <br /> oxygenates were detected in the samples <br /> ' The December 2004 quarterly groundwater-monitoring event indicated that <br /> the groundwater elevation decreased approximately 0 77 feet from the <br /> previous event performed in August 2004 During flus event, the average <br /> depth to groundwater was 30 22 feet bgs (-20 46 feet msl) The groundwater <br /> flow direction was easterly at a gradient of approximately 0 005 feet per linear <br /> foot BTEX and TPH-g concentrations increased in well MW-2, presumably <br /> due to the air sparging/soil venting system being temporarily out of service <br /> BTEX and TPH-g concentrations were not detected in the samples collected <br /> from wells MW-1, MW-3, or MW-4 Oxygenates were not detected during <br /> this event The air sparging/soil venting system was placed back into <br /> operation on December 15, 2004 <br /> The first quarterly groundwater-monitoring event of 2005 occurred in March <br /> The depth-to-groundwater measurements indicated that the groundwater <br /> elevation increased approximately 155 feet from the previous event During <br /> this event, the average depth to groundwater was 28 68 feet bgs (-18 91 feet <br /> msl) The groundwater flow direction was easterly at a gradient of <br /> approximately 0 005 feet per linear foot BTEX and TPH-g concentrations <br /> decreased or remained stable in well MW-2 BTEX and TPH-g were not <br /> detected in the samples collected from wells MW-1, MW-3, or MW-4 <br /> Oxygenates were not detected during this event There were no mayor <br /> operational or maintenance issues with the SVE system during this period <br /> Although, after the groundwater samples were collected, the SVE system did <br /> not function properly upon re-engagement Maintenance of the system was <br /> scheduled <br /> 15 <br /> Quarterly Groundwater <br /> Monstoring Report <br /> 4th Quarter-November 2065 <br /> Prepared for SARA LEE BAKERY GROUP,INC Prepared by PSC Environmental Services <br /> 1 Investigative and Quarterly Report 14th Quarterly Report r 1.2005 doc February 24 2006 <br />