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vandalism to the monitoring equipment. The system will be powered by a solar panel, <br />and one of the units will be equipped with a meteorological weather station (rainfall, <br />barometric pressure, evapotranspiration, solar radiation, etc). Both multiplexers will be <br />accessible via remote telemetry for convenience in downloading and data analysis. <br />Task la — Installation of Moisture Monitoring Equipment <br />Installation of the TDR water content reflectometers (WCR's — Appendix A) is by <br />horizontal placement. A backhoe and manual tamper (compactor) will be required for <br />placement, and it is assumed the client will provide this equipment. The WCR placement <br />is off -set so that no probes overlie each other. Once the probes are installed and cover soil <br />has been placed and compacted over the probes, the wires are placed in protective PVC <br />conduit and wired to the datalogger (multiplexer). It is assumed that 2 moisture stacks <br />will be monitored as a part of the FL alternative final cover demonstration project. The <br />proposed locations of these stacks are presented on Figure 1 and the proposed vertical <br />distribution of the WCR's is presented on Figure 2. <br />Task lb — Calibration and Annual Maintenance of Moisture Monitoring Equipment <br />Calibration of the WCR probes is conducted by careful monitoring of the system, and <br />comparative moisture sampling from samples collected within the monitoring system. <br />Collection of field samples for laboratory testing are compared to actual system readings <br />at depth until the resolution is within a specified range (usually ±5% volumetric water <br />® content). In addition, an annual maintenance check of all system components will be <br />conducted to verify full system functionality and to verify no vandalism has occurred to <br />the units. <br />Task 2 — Flux Monitoring <br />In addition to the WCR probes, two drain gauges (manufactured by Decagon — Appendix <br />B) will be installed at each stack location to monitor physical water movement through <br />the final cover soils. These too, will be wired to the datalogger for remote access to the <br />data. <br />Task 3 — Installation and Monitoring via Remote Telemetry System <br />This task includes the installation of a remote telemetry system that will be installed to <br />allow for fast and convenient access to the units at any moment in time. Once the system <br />is in full working order, data download for the probes will be accessible from any <br />computer that has the appropriate program installed. Data will be retrieved twice <br />monthly and a data file will be created for every download event from each of the <br />multiplexer units. <br />C:12005-0082%workpiamDO007/11/05 -3- <br />GeoLogic Associates <br />