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1 <br /> • documentation are included in Appendix B Groundwater sample analytical results are shown in <br />' Figure 1 <br /> I 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 WB system is included in an <br />' installation report issued in June 1997 The UVB system operated continuously during the fourth <br /> quarter Since the initial start-up of the WB system, approximately 1,081 pounds of TPH-g have <br /> been stripped from the groundwater Table 2 provides a summary of fourth quarter 1999 field data <br />' and laboratory analytical results for the UVB system A graphic representation of the WB 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 February 2000 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 /> I <br /> i <br /> F 1Projccts173942MMA5TER\WPIQ]299titx dnC 2 <br />