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inspection, Del-Tech reported that the system was offline due to a tripped main breaker switch. The main breaker switch was reset and the system was restarted. During the July 29, 2010 inspection, Del-Tech noted that the pump motor in extraction well EW-3R had failed and was offline. Del-Tech replaced the pump motor on August 13, 2010. During the August 15 inspection Del-Tech noted that the tower had calcified so that it was not performing the air stripping process effectively. The system was taken offline for cleaning and repairs and the system was restarted on August 19, 2010. No other downtime was reported for the GTF during the monitoring period. It should be noted, however, that the system was taken offline on October 15, 2010 due to increasing backpressure in the influent line at the tower. Inspection of the air stripper tower indicated that the packing material has calcified and needs to be replaced. It is estimated that the system will be restarted on November 1, 2010 following replacement of the packing material and other system improvements. Influent and Effluent Monitoring—During the monitoring period, effluent samples were collected monthly from the GTF and submitted for analysis of VOCs by EPA Method 8260B. The July and September 2010 effluent sample were also analyzed for TDS. Table 1 summarizes the field and analytical results for the GTF during the third quarter 2010 monitoring period. As shown on Table 1,three VOCs were measured above the practical quantitation limit(PQL) and one trace level VOC was measured in the effluent sample collected during the July 2010 sampling event and one trace level VOC was measured in the effluent sample collected during the August 2010 sampling event. No VOCs were detected in the effluent sample collected during the September sampling event. It is believed that sporadic detection of VOCs in the effluent samples collected during the monitoring period are the result of the calcification of the air stripper. As discussed above the system was taken offline on October 15, 2010 to make the necessary repairs to the system to ensure proper groundwater treatment. GLA hopes that the information provided herein is sufficient for your records. If you have any questions regarding this notification,please call me at (858) 451-1136. G o-Logic Associates l_ William B. Lope , G, CHg Project Geologis c: Don Litchfield, BFI Enclosure: Table 1 —GTF Influent/Effluent Sample Results and Flow Rate Analytical Results—TestAmerica Field Monitoring Reports—Del Tech 2