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FOURTH QUARTER 2008 GROUNDWATER TREATMENT FACILITY MONITORING REPORT FORWARD LANDFILL WDR ORDER NO.R5-2003-0080 TABLE 1 Monthly Average Effluent Flow Rates Fourth Quarter 2008 Groundwater Treatment Facility Monitoring Report, Forward Landfill WEIR Order No.R5-2003-0080 Average Flow Rate Month (gallons per day) October 299,000 November 151,000 December 194,000 At the beginning of fourth quarter 2008,EW-1 and EW-2 were operational,and the GTF effluent was discharging to the infiltration pond. The GTF lost power and shut down on October 1,2008,after an automobile struck a power pole near the landfill.The GTF experienced intermittent power losses after the collision until October 15,2008,while utility workers repaired the damaged power lines. The GTF was shut down on October 15,2008,and the air stripper packing material was replaced with new packing material during October 15 and 16,2008.This non-routine preventive maintenance was conducted to prevent further compaction of the packing material because of excessive wear.Approximately 7 cubic yards of waste packing material were characterized for disposal and disposed of on-site at Forward Landfill.The GTF was restarted on October 16,2008. The GTF was shut down on October 29,2008,and new flow meters were installed at EW-1, EW-2,and on the influent conveyance to the air stripper.The new meter installations at EW-2 and the influent conveyance to the air stripper were completed on October 29,2008, and the GTF was restarted at the end of the work shift with only EW-2 operating.The meter installation at EW-1 was completed and EW-1 was restarted on October 30,2008. The GTF shut down because of a power outage on December 9,2008. During a site visit on December 12,2008,a technician determined that the GTF autodialer was not functioning properly.The autodialer was not calling the programmed numbers to deliver a warning message under alarm conditions.The technician interrogated the autodialer program setup i parameters and determined that the setup parameters were correctly entered and that a manufacturer's technician was needed to perform additional troubleshooting. A manu- facturer's technician called the autodialer on December 17,2008,and determined that certain set points had been disabled. The manufacturers technician reprogrammed the autodialer remotely.The autodialer was tested by artificially forcing alarm conditions.The autodialer then called the programmed numbers and delivered the proper warning messages. The GTF shut down on December 25,2008. A technician received the alarm notification from the autodialer and restarted the GTF during the morning of December 25,2008.The cause of the shutdown was not determined. CH2M HILL reviewed the 2008 GTF influent flow rate data set and observed that the flow rate decreased during 2008. CH2M HILL recommends that EW-1 and EW-2 be rehabilitated to increase well productivity.Well rehabilitation activities and results will be discussed in the First Quarter 2009 Groundwater Treatment Facility Monitoring Report. RDDI090210008(NLH3955.DOC) 2