Accidents: September 2018 | Flapper Check Valve

To further limit the influence of high gold grade outliers during grade estimation, SRK chose to cap composites, as these are the data used explicitly in estimation. Capping was performed by grade domain and by lithology domain. SRK relied on a combination of probability plots, decile analysis, and capping sensitivity plots. Separation of grade populations characterized by inflections in the probability plot or gaps in the high tail of the grade distribution were indicators of potential capping values. Decile analysis was then used to confirm the reasonableness of the capped threshold. The chosen capped values, along with the uncapped and capped composite statistics are provided in Table 14-14. Figure 14-11 shows an example probability plot and capping sensitivity curve for the fault low grade (Fault LG) domain. Appendix B shows relevant capping plots for all other domains.

4. If the zone opens but the relay does not pull in, jump out the end switch on the zone valve. If the relay pulls in, replace the end switch or the head.

A sampling log is prepared by IAMGOLD-RGM geologists with required control samples (blanks and certified reference materials, CRM) as per quality assurance and quality control procedure. For the beginning of every hole, a rock blank is inserted. Then, CRM and blanks are inserted alternately every 10 samples.

As shown by the metallurgical performances of NW (TRANS) and NW (FRESH) and the production test, addition of multiple steps of activation and numerous scavenger steps improved the recovery of sulfur and gold in the sulfur concentrate. However, it was not optimized and 21.22% of the gold was left in the tailings, and optimization of gold recovery should be performed to reduce the losses. The approach taken during this test work was to float the talc and unfortunately probably lost gold units through entrainment during the flotation. Multiples steps of talc cleaning were tried in order to reduce gold units in the talc without complete success. A complete mineralogy study is currently in progress in order to understand why the flotation was not as successful as planned and to align further testing accordingly.

The effective date of this Technical Report is September 23, 2018, the date of the public disclosure of the Mineral Resource and Mineral Reserve estimate for RGM and the Saramacca property.

IAMGOLD-RGM did not receive information from the Republic of Suriname regarding the sampling method and approach historically used by Golden Star and Newmont.

Paired data of coarse reject duplicate samples submitted during the 2018 DD drilling program indicate that RGM lab had little difficulty in reproducing the results. Ranked HARD plots suggest that 63.3% of the coarse reject duplicates have HARD values below 10% with no obvious bias detected. Paired data of sample pulp duplicates indicate that RGM lab had moderate difficulty in reproducing the results. Ranked HARD plots suggest that 51.1% of the pulp duplicates have HARD values below 10% with no obvious bias detected. Poorer reproducibility of pulp duplicates compared to coarse rejects is unexpected as the pulp should be more homogeneous. The reason for the difference is unknown.

Inventor(s): Craig Rosenfeld (Dallas, TX) Assignee(s): Collaborative Medicinal Development, LLC (Sausalito, CA) Law Firm: Cermak Nakajima McGowan LLP (1 non-local offices) Application No., Date, Speed: 14040393 on 09/27/2013 (1782 days app to issue)

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The wireless alarm has four red LEDs, each of which light up when a signal is detected. I connected one side of each of these LEDs to four of the Arduino’s analog-input pins. The voltage on the anodes drops to less than 3 V when an alarm is triggered. So the Arduino simply polls each of the four inputs constantly to see if any of them is reading under 3 V. If so, the Arduino energizes the 5-V relay.

The LOM schedule and production rate have been established to feed the mill to its power capacity while respecting annual mining rate constraints, phase drop down rates, and minimizing truck peak requirements.

Inventor(s): David Andersen (Dillon, CO), J. Roy Pottle (Wellesley, MA), Jamie Gordon Nichol (Arlington, MA), John F. Nagel (Southlake, TX), Peter C. Barnett (Mason, OH), Sangsoo Kim (Seoul, , KR) Assignee(s): American Messaging Services, LLC (Lewisville, TX) Law Firm: Ulmer Berne LLP (2 non-local offices) Application No., Date, Speed: 15681518 on 08/21/2017 (358 days app to issue)