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Actionable news in RBY: RUBICON MINERALS CORPORATION,

Rubicon Minerals: Mcr Re Ammonia Dated October 7, 2015

”) on September 30, 2015 to temporarily suspend mill operations at the Phoenix Gold Project (the “

”) to treat elevated ammonia levels, discharge sufficient water from the tailings management facility (“

”), and to upgrade the TMF, under specific timelines. The initial order received on September 8, 2015 ordered the Company to commission new interim and permanent ammonia treatment systems for the effluent held in its TMF and discharge a portion of treated effluent. It also ordered the Company to undertake other operational and reporting obligations, including construction upgrades to the TMF. The initial order was amended by the MOECC on September 14, September 18, and September 30, 2015 to allow the Company time to upgrade its facilities in order to discharge treated effluent.

The net effect of the orders issued by the MOECC is to temporarily suspend mill operations and the discharge of mill process wastewater to the TMF until the interim ammonia treatment system can be commissioned and proven effective to the MOECC’s satisfaction. Based upon the current advice of the Company’s engineering consultants, this process is expected to take two-to-four weeks. The Company’s engineering consultants are also reviewing the water balance of the TMF and there is the potential that the required discharge of treated effluent could be significantly lower than 140,000 m

, due to low precipitation during the recent months and other factors. The Company is required to meet its discharge obligations no later than November 30, 2015. The Company announced it will provide additional updates with respect to the progress of its activities.

Item 5

Full Description of Material Change

On October 5, 2015, the Company announced that it had been ordered by the MOECC on September 30, 2015 to temporarily suspend mill operations at the Project to treat elevated ammonia levels, discharge sufficient water from the TMF...


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