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period, it is calculated that the GTF removed approximately 2.72 pounds of VOCs. <br /> Extraction well EW-3R is currently offline due to a pump failure. <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 March 2011 effluent sample was also analyzed for TDS. Table I <br /> summarizes the field and analytical results for the GTF during the first quarter 2011 <br /> monitoring period. As shown on Table 1,one trace level VOC was measured in the <br /> effluent sample collected during the January 2011 sampling event; three VOCs were <br /> measured above the practical quantitation limit(PQL) in the effluent sample collected <br /> during the February 2011 sampling event, and five trace level VOCs were measured in <br /> the effluent sample collected during the March 2011 sampling event. It is believed that <br /> sporadic detection of VOCs in the effluent samples collected during the monitoring <br /> period are the result of the sample location for the effluent samples following <br /> replacement of the discharge pipe, which had become calcified over time. Prior to GTF <br /> repairs (conducted between October 26 and December 10, 2010)effluent samples were <br /> collected from a sample port located at the far end of the effluent discharge line. <br /> However, a sample port was not tapped into the new discharge line, and as a result, <br /> effluent samples were being collected at the GTF. On April 14, 2011, Del-Tech tapped a <br /> new sample port at the far end of the new discharge line and has collected the monthly <br /> effluent sample to verify that the VOCs are no longer present in the discharge water. <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, CHg <br /> Senior Geologist <br /> c: Don Litchfield, BFI <br /> Enclosure: Table I —GTF Influent/Effluent Sample Results and Flow Rate <br /> Analytical Results—Test America Laboratories <br /> Field Monitoring Reports—Del Tech <br /> 2 <br />