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2.2 <br />2.3 <br /> <br />Disposal Area and Embankment System <br />During operations, the settlement sensors will be' checked on <br />a monthly basis and adjustments, if required, in subsequent lifts <br />will be made on the basis of the on-going monitoring pnogram. <br />Monitoring will include quarterly sampling of tailings to <br />determine gradations, in-place densities, and deposition angles. <br />Density control tests will be performed on the tailings sand <br />deposited in the disposal area to verify that deposition obtains the <br />required density. After a trend has been established in qhe tailings <br />deposition testing, BMR will submit a technical revision to the <br />Division showing the trends and requesting a reductfion in the <br />required monitoring. <br />Following establishment of a beach of tailings upstream of the <br />embankment and prior to construction of subsequent embanl~ment raises <br />a specific study of tailings affected by the raises will be <br />performed. This study will include a determination of inplace <br />density, degree of saturation and material gradation forlevaluation <br />of the structural integrity of the tailings under staticiand seismic <br />induced loading. <br />Monitoring of the flow site and quarterly sampling of the <br />seepage from the drain system at the base of the taili{~gs will be <br />performed. A plot of the rate of seepage over tilde will be <br />maintained and compared to the predicted rate. Chemiclil analysis <br />parameters identified in Table G.1-2 of the approved perinitr will be <br />performed. In addition, the leak detection system of thelcollection <br />pond will be monitored for any water weekly during initial six month <br />start-up and monthly_thereafter. <br />Mass and Water Balance Monitoring <br />7 <br />Each of the elements used in the evaluation of tie mass and <br />