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precipitation, is observed. As noted above, this moisture pattern is consistent with the introduction of water from the waste and into the final cover; a condition that cannot be effectively modeled because is occurs in the vapor phase. 9.0 RECOMMENDATIONS Owing to the immature nature of the plant community developed over the site, the relatively dry year monitored and the minimum regulatory requirement for at least two years of final cover monitoring, it is recommended that the monitoring program for the alternative final cover at the FSL be continue for one more year. This will not only allow for a broader multi-year dataset but is expected to provide additional data to support interpretation of the cause of increasing soil moisture contents during periods without precipitation. 10.0 CONCLUSION Based on the data obtained from the on-site monitoring stations, it- is concluded that the alternative final cover system at the FSL is performing as expected. That is, the data indicate that the alternative final cover is controlling infiltration as expected and, in fact, a net drying of the cover/waste has occurred.over the monitoring period. This performance is consistent with the initial modeling and the performance of other monitored sites in similar climatic settings. GeoLogic notes that the plant community at the FSL is not fully developed and, as a result, the performance of the final cover system should continue to improve as plant maturity develops. 11.0 CLOSURE This report is based on the project as described and the geotechnical data obtained in this study. Our firm should be notified of any pertinent change in the project plans or if conditions are found that differ from those described in this report, since this may require a reevaluation. This report has not been prepared for use by parties or projects other than those named or described above. It may not contain sufficient information for other parties or other purposes. This report has been prepared in accordance with generally accepted geotechnical practices and makes no other warranties, either express or implied, as to the professional advise or data included in it. A_GeoLisociates cal, P.E. Gary . ass, RG, EG, HG Project Engineer President ATTACHMENTS: Table 1 — Engineered Backfill Soil Test Results Figures 1 through 13 Appendix A — Equipment Specification and Calibration Reports Appendix B — Installation and Recent Site Photos g GeoLogic Associates