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A ! # vIENT ! <br /> Gauge cylinder penetrates 12 inches into the ground and this level should be <br /> consistently attained for every sample. If, during the penetration, the Gauge hits <br /> or rock before the 12 inch depth is attained, the Gauge should be pulled out and <br /> moved over until the 12 inch depth is reached. <br /> b- If the Gauge reports a lower compaction than 94%, the moisture should be <br /> checked to see if it in the range of 13% to 18%. If it is below 13%, it should be <br /> watered slightly. If it is too high, the material in this lift should be dozed and <br /> allowed to dry.In either case, the material can be respread in the 12 inch lift and <br /> re-tested for compaction and moisture. If the moisture is in the proper range but <br /> the 94%is not achieved, this means that compaction has not been properly done <br /> and the surface equipment should be brought back to re-compact that lift. <br /> c- Frequency of the compaction testing of the tailings/waste rock mixture must be <br /> increased if there is reason to believe that some unusual condition exists, such as <br /> very high a moisture content from rain or snow, etc. <br /> d- For each compaction test, entries should be made in the forms included in <br /> Appendix C. These forms will document the %dry density achieved, the moisture <br /> and the location of the test as well as the date. Completed forms should be kept at <br /> the back of the on-site manual. <br /> e- Once consistent procedures have been developed and compaction has been <br /> achieved using the procedures above with little variability, site personnel can <br /> request a lowering of the frequency of the compaction testing to the professional <br /> engineer that will provide the as-built report to the DBMS every year regarding <br /> the proper construction of the tailings and waste rock embankment. <br /> 3 <br />