ARCHIVED REPORTS_2006_12 - Laserfiche WebLink

Home Browse Search

FIRST QUARTER 2006 GROUNDWATER TREATMENT FACILITY MONITORING REPORT FORWARD LANDFILL WDR ORDER NO. R5-2003-0080 If the radio controls are successful, replacement of buried wiring will likely be limited to installation of new power supply conductors for EW -1. In this case, a trench will be excavated outside the toe of the former Austin Road Landfill and new wiring and conduit will be installed. The trench will then be backfilled. The existing buried wiring and conduit for EW -1 and EW -2 will be abandoned in place. 3.0 Influent and Effluent Monitoring Under WDR Order No. R5-2003-0080, effluent samples are analyzed as follows: • Monthly for pH, specific conductivity, and VOCs • Quarterly for total dissolved solids • Annually for dissolved inorganics All parameters other than dissolved inorganics were analyzed during first quarter 2006. Figure 1 shows the effluent monitoring location. Table 2 presents the results of the effluent monitoring performed during first quarter 2006. Appendix A contains the effluent monitoring field sampling logs and laboratory results for first quarter 2006. The current WDRs stipulate that the concentration limit for VOCs in the effluent is non - detect (ND). Chloromethane was detected in the effluent sample collected on January 12, 2006, at a concentration slightly above the detection limit. Chloromethane was not detected in the GTF influent samples collected in 2004, 2005, or first quarter 2006. The source of chloromethane in the January effluent sample is unknown. However, the VOC internal and surrogate standards, which are added to a sample prior to analysis, are prepared in RDD1061100003 (NLH3129.DOC) The GTF was restarted on March 17, 2006, and EW -1 was operated from 1:41 p.m. to 2:02 p.m. to check plant operation. The GTF operated normally during this period. The GTF was shut off at 2:02 p.m. The release of extracted groundwater to the infiltration pond, and subsequent corrective actions, are documented in the Forward Landfill Groundwater Treatment Facility March 2006 Release Report (Forward Incorporated, 2006), submitted to the CVRWQCB in April 2006. Between March 20 and 24, 2006, approximately 90 percent of the GTF effluent pipeline was replaced. The new pipe was surveyed on March 24, 2006, to confirm an adequate slope for drainage from the air stripper to the infiltration pond. On March 30, 2006, the GTF was restarted with EW -1 on and EW -2 off. Following the restart, an elevated air pressure was measured at the air stripper blower. The air pressure was greater than is normally observed after an acid washing. The GTF was shut down on March 30. The air stripper manufacturer has been consulted and the air stripper will be inspected during second quarter 2006 to determine the source of excess pressure. The GTF will remain off until the inspection is completed. A solution to eliminate the excess pressure will be developed and implemented so that the GTF can be returned to normal operation. Forward Landfill is planning to replace the buried electrical wiring and conduit for EW -1 and EW -2 during 2006. The use of radio telemetry for controlling both GTF extraction wells will be attempted in spring 2006 as an alternative to installing new control wiring and conduit. If the radio controls are successful, replacement of buried wiring will likely be limited to installation of new power supply conductors for EW -1. In this case, a trench will be excavated outside the toe of the former Austin Road Landfill and new wiring and conduit will be installed. The trench will then be backfilled. The existing buried wiring and conduit for EW -1 and EW -2 will be abandoned in place. 3.0 Influent and Effluent Monitoring Under WDR Order No. R5-2003-0080, effluent samples are analyzed as follows: • Monthly for pH, specific conductivity, and VOCs • Quarterly for total dissolved solids • Annually for dissolved inorganics All parameters other than dissolved inorganics were analyzed during first quarter 2006. Figure 1 shows the effluent monitoring location. Table 2 presents the results of the effluent monitoring performed during first quarter 2006. Appendix A contains the effluent monitoring field sampling logs and laboratory results for first quarter 2006. The current WDRs stipulate that the concentration limit for VOCs in the effluent is non - detect (ND). Chloromethane was detected in the effluent sample collected on January 12, 2006, at a concentration slightly above the detection limit. Chloromethane was not detected in the GTF influent samples collected in 2004, 2005, or first quarter 2006. The source of chloromethane in the January effluent sample is unknown. However, the VOC internal and surrogate standards, which are added to a sample prior to analysis, are prepared in RDD1061100003 (NLH3129.DOC)