Laserfiche WebLink
On May 31, 2011 work was completed to upgrade the system's 4-inch influent line to 6 <br /> inches. During the May 31, 2011 inspection, Del-Tech noted that the bearings for the <br /> GTF blower had worn out and was not operational, and therefore, the GTF was shut <br /> down between May 31 and June 25, 2011,pending the delivery of the replacement <br /> blower. On June 25, 2011, the blower was replaced and the GTF was restarted. <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 /> 8260B. The June 2011 effluent sample was also analyzed for TDS. Table 1 summarizes <br /> the field and analytical results for the GTF during the second quarter 2011 monitoring <br /> period. As shown on Table 1,two trace level VOCs was measured in the effluent sample <br /> collected during the April 2011 sampling event. It is believed that these VOCs were the <br /> result of blower failure in the GTF. Because the blower was found to be inoperable, the <br /> May 2011 influent and effluent samples were not collected from the GTF. During the <br /> June 2011 sampling event, six low level VOCs were measured in the effluent sample. <br /> However, none of the VOCs exceeded Federal or State drinking water standards. It is <br /> believed that these low level VOC detections are the result of an increase in the volume <br /> of water that is treated by the GTF (which decreased the ratio of air to water in the GTF) <br /> after the influent line was upgraded from 4 inches to 6 inches. Del-Tech was notified of <br /> the concerns and has adjusted the influent flow rate back to the historical flow rate of <br /> approximately 216,000 gpd. <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 1 —GTF Influent/Effluent Sample Results and Flow Rate <br /> Analytical Results—BC Laboratories <br /> Field Monitoring Reports—Del Tech <br /> 2 <br />