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1 <br />' documentation are included in Appendix B Groundwater sample analytical results are shown in <br /> • Figure 1 <br />' 3. GROUNDWATER TREATMENT SYSTEM <br />' A vacuum vaporizer well system, known as WB (Unterdruck Verdampfer Brunnen), has been <br /> operating at the site since 6 February 1997 A description of the UVB system is included in an <br /> installation report issued in June 1997 The UVB system operated continuously during the third <br />' quarter Since the initial start-up of the UVB system, approximately 771 pounds of TPH-g have <br /> been stripped from the groundwater Table 2 provides a summary of third quarter 1999 field data <br /> and laboratory analytical results for the UVB system A graphic representation of the UVB system <br />' performance to date is shown in Figure 4 <br />' 4. WORK PROPOSED FOR NEXT QUARTER <br /> Depths to water will be measured and groundwater samples will be collected in November 1999 The <br />' samples will be analyzed for TPH-g, BTEX, and MTBE <br /> The UVB system will continue to be operated and monitored and results reported in the next <br />' quarterly report <br /> 1 <br />' \VsI\SYS\Projccts\73942�MASTCRIWP\Q899$i doc 2 <br />