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THIRD QUARTER 2007 GROUNDWATER TREATMENT FACILITY MONITORING REPORT <br /> FORWARD LANDFILL WDR ORDER NO.R5-2003-0080 <br /> extraction well cycling. The electrician replaced the flow sensor paddles at EW-1 and EW-2 <br /> as preventive maintenance to address mechanical wear. While replacing the flow sensor <br /> paddle at EW-2,the electrician observed a crack in the sensor body. A new sensor was <br /> ordered for EW-2.The blower damper was adjusted slightly to maximize air flow into the <br /> air stripper while maintaining the motor current within operating limits. <br /> The electrician installed new radio receivers with built-in signal strength meters at both <br /> extraction wells on July 25, 2007.The radio control system can operate at one of four <br /> frequencies.After installing the new receivers,the electrician recorded the signal strength at <br /> both extraction wells using the existing radio control system frequency. The electrician <br /> initially observed a very strong radio signal at EW-1,and a weak and fluctuating signal <br /> at EW-2. <br /> The plant electrician visited the GTF on July 26,2007,and recorded the signal strength at <br /> both extraction wells using each of the three optional radio frequencies.The electrician <br /> switched the radio control system to the frequency that yielded the strongest signals at both <br /> EW-1 and EW-2.The new frequency did not alter the signal strength at EW-1,but signifi- <br /> cantly improved signal strength at EW-2. The electrician also replaced the omnidirectional <br /> antenna at EW-2 with a directional antenna,which further improved signal strength at <br /> EW-2. EW-2 now receives a strong, steady signal from the GTF transmitter. <br /> During a site visit on August 2,2007,EW-2 was not operational and the voltage monitor <br /> relay was again found to be disconnected.The voltage monitor relay was reinstalled and <br /> EW-2 was restarted. EW-2 operated intermittently and was shut off on August 3,2007.An <br /> electrician visited the GTF on August 9,2007,and replaced the existing,worn voltage <br /> monitor relay base at EW-2. The electrician also replaced the flow sensor at EW-2. EW-2 was <br /> restarted and resumed normal operation.The electrician replaced the coax cable between <br /> the GTF radio control transmitter and the transmitter antenna on August 9,2007. The new <br /> coax cable was rerouted to prevent high voltage wires at the GTF control panel from <br /> interfering with the radio control signals. <br /> As discussed in Section 3.0,TCE was detected at a low concentration in the effluent <br /> sample collected on August 2,2007. A confirmation effluent sample was collected on <br /> August 16,2007,and the GTF was then shut down.VOCs were not detected in a reanalysis <br /> of the August 2,2007,effluent sample or in the August 16,2007, confirmation sample,and <br /> the GTF was restarted for continuous operation on August 17,2007. <br /> During third quarter 2007, the GTF shut down five times because of power outages on <br /> July 4,July 24,July 31,August 5,and September 1.The GTF was restarted following each <br /> power outage on July 5,July 25,August 1,August 6,and September 4,respectively. <br /> 3.0 Influent and Effluent Monitoring <br /> Under WDR Order No. R5-2003-0080,effluent samples are analyzed as follows: <br /> • Monthly for pH,specific conductivity,and VOCs <br /> • Quarterly for total dissolved solids <br /> • Annually for dissolved inorganics <br /> RDD1072830006(CLR3709.DOC) 3 <br />