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• <br /> monitoring period, it is calculated that the GTF removed approximately 2.42 pounds of <br /> VOCs. <br /> October 18, 2011, Del-Tech replaced the blower wheel and the system was restarted. No <br /> other maintenance work was performed on the GTF during the monitoring period. <br /> Influent and Effluent Monitoring—During the monitoring period, effluent samples were <br /> collected monthly from the GTF and submitted for analysis of VOCs by EPA Method <br /> 8260 . The November 15, 2011 effluent sample was also analyzed for TDS and 24 <br /> dissolved metals. In addition, an influent sample was collected on November 15, 2011 <br /> and submitted for analysis of VOCs by EPA Method 8260B. Table 1, summarizes the <br /> field and analytical results for the GTF during the fourth quarter 2011 monitoring period. <br /> As shown on Table 1, seven VOCs were detected in the influent sample with five above <br /> the practical quantitation limit. Up to four estimated trace-level VOCs were detected in <br /> the effluent samples collected during the monitoring period. However, none of the VOCs <br /> exceeded Federal or State drinking water standards. GLA and Del-Tech are attempting to <br /> work with the air stripper manufacture to remove the trace level VOCs measured in the <br /> effluent. <br /> GLA hopes that the information provided herein is sufficient for your records. If you <br /> have any questions regarding this notification, please call me at(858) 451-1136. <br /> GeoLogic Associates <br /> William B. pez, PG, Cg <br /> Senior Geologist <br /> c: Don Litchfield, BFI <br /> Enclosure: Table I —GTF Influent/Effluent Sample Results and Flow Rate <br /> Analytical Results—BC Laboratories <br /> Field Monitoring Reports—Del Tech <br /> C-U01 1-0043\GTFmonrpt4Q1 Ldoex 2 Geo-Logic Associates <br />