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First Quarter 2006 Groundwater Treatment r Facility Monitoring Report Forward Landfill WDR Order No. R5-2003-0080 1 1.0 Summary This First Quarter 2006 Monitoring Report for the Forward Incorporated (Forward) Landfill 1 Groundwater Treatment Facility (GTF) presents the monitoring results for influent and effluent. This report was prepared as stipulated by the Central Valley Regional Water Quality Control Board (CVRWQCB) Waste Discharge Requirements(WDR)Order No. R5-2003-0080,which was adopted on April 25, 2003. Following review of the information presented in this document,the following conclusions have been made: • The GTF operated for 1,773 hours between December 29,2005,and March 30,2006,at 81.1 percent uptime and treated 8.829 million gallons of groundwater. During this period, the GTF removed approximately 2.4 pounds of volatile organic compounds (VOC). • During first quarter 2006, the effluent sample collected in February met WDR Order No. R5-2003-0080 for VOCs. No VOCs were detected. • Chloromethane was detected in the effluent sample collected on January 12,2006,at a concentration slightly above the detection limit. Chloromethane was not detected in the GTF influent samples collected in 2004, 2005,or first quarter 2006.The source of ' chloromethane in the January effluent sample is unknown. However, the VOC internal and surrogate standards,which are added to a sample prior to analysis,are prepared in methanol, and the sample preservative is hydrogen chloride. Chloromethane is occasionally produced in a sample when methanol reacts with hydrogen chloride. The chloromethane detected in the January effluent sample might have resulted from this reaction. ' • Acetone was detected in the effluent sample collected on March 2, 2005,and was also detected in the associated trip blank sample.The data indicate that the acetone detections are associated with laboratory activities,and that acetone is not actually present in the effluent. Acetone has never been detected in the GTF influent. 2.0 Operational Summary The GTF operated for 1,773 hours between December 29,2005,and March 30, 2006,at 81.1 percent uptime and treated 8.829 million gallons of groundwater at an average flow rate of 83 gallons per minute, or 0.119 million gallons per day. During this period, the GTF RDD/061100003(NLH3129.DOC) 1