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0 2.1.6 Surface Water Monitoring Site run-on and run-off control facilities are designed to effectively channel surface water to site stormwater/sedimentation ponds. According to the Operations Manager, no surface water was discharged from the facility during the reporting quarter. During the second quarter 2008 monitoring period, surface -water monitoring stations FSW-1 and FSW-2 were sampled on May 5, 2008. Table 2-8 summarizes the current analytical results for surface water samples collected at the Forward Unit. No VOCs were detected in the samples collected from the surface water stations during the second quarter 2008 monitoring period. A comparison of upgradient (FSW-2) to downgradient (FSW-1) surface water samples indicates generally similar inorganic constituent concentrations suggesting that the landfill operations are not impacting surface water quality. 2.1.7 Leachate Monitoring Leachate sumps are inspected for the presence of leachate and observations are recorded at least weekly by Forward Landfill personnel. If leachate is detected in a sump, it is pumped into the surface impoundment (WMU F) for evaporation. During the second quarter 2008, leachate was observed at holding areas WMU D-89, WMU D-93/94, WMU D-01, WMU D-02, WMU FU -03, WMU FU -04, WMW FU -05, and WMU FU -06. The other holding areas were reported to be dry by Forward Landfill personnel. Freeboard at WMU-F ranged from approximately 6.33 feet to 11.08 feet during the second quarter 2008 monitoring period. Appendix A presents copies of the leachate logs and the freeboard observation logs. Leachate samples were collected on a monthly basis and analyzed in the field for pH and specific conductance. In addition to monthly monitoring, a retest sample was also collected to verify if benzoic acid is a potential new COC. Results of monthly field monitoring measurements and analytical results for the retest are presented in Table 2-8. As shown in Table 2-8, benzoic acid was confirmed as a new COC and will be added to the site specific COC list for the Forward Landfill. 2.1.8 Constituents of Concern In addition to the routine quarterly monitoring parameters, samples were also analyzed for the full suite of COCs stipulated in RWQCB Order No. R5-2003-0049 and performed every five years. Table 2-1 summarizes the COCs included for the Forward Unit and Tables 2-2 and 2-7 summarize the results. Excluding the metals which may be naturally occurring, the following COCs were detected in samples collected from the Forward Landfill Unit: 2,4,5-T (a chlorinated herbicide) was detected above the PQL in the sample collected from well MW -2A; trace level concentrations of bis(2- ethylhexyl)phthalate, a common field/lab contaminant, were measured in the samples collected from wells MW -IA, MW -16, MW -17, MW -21, and MW -24; sulfide was detected above the PQL in the sample collected from well MW -24; cyanide was detected at a trace value in the sample from upgradient surface water station FSW-2; and cyanide D:\2008_0010XFA_2Q08.doc 7 Geologic Associates