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Second Quarter 2007 Groundwater Treatment Facility Monitoring Forward Landfill WDR Order No. 115-2003-0080 1.0 Summary This Second Quarter 2007 Monitoring Report for the Forward Incorporated (Forward) Landfill 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 (CV Water Board) 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 1,888 hours between April 1 and June 30,2007,at 86.4 percent uptime,and treated 22.266 million gallons of groundwater. During this period,the GTF removed approximately 3.2 pounds of volatile organic compounds (VOC). • During second quarter 2007,effluent samples collected in April and June met WDR Order No. R5-2003-0080 for VOCs. No VOCs were detected. • Methylene chloride and tetrachloroethylene (PCE)were detected in the effluent sample collected on May 1,2007. PCE was detected at a concentration equal to the method detection limit (MDL).The methylene chloride detection most likely resulted from laboratory contamination.The PCE detection appeared to be anomalous and might have resulted from cross contamination during sample collection,transport, or analysis.The GTF was shut down,restarted, and resampled.No VOCs were detected in the confirmation effluent sample collected on May 25,2007. • A new check valve was installed inside the vault adjacent to Extraction Well (EW)-2 on April 3,2007. A brief operational test of the check valve was performed on April 4,2007, and no leaks were detected. EW-2 was restarted on April 5,2007. • Three small leaks were detected and repaired at the GTF during second quarter 2007. Two leaks occurred at EW-2,and the third leak occurred at the influent header pipe. 2.0 Operational Summary The GTF operated for 1,888 hours between April 1 and June 30,2007, at 86.4 percent uptime, and treated 22.266 million gallons of groundwater at an average flow rate of 197 gallons per minute,or 0.283 million gallon per day. During this period,the GTF removed approximately 3.2 pounds of VOCs.Table 1 presents the monthly average effluent flow rates in gallons per day. RDD1071990021(NLH3536.DOC) 1