We analyzed and assessed the Interagency Commission’s report and the related Moran Comments... Our review...highlights that the Commission’s water sampling and/or analysis pertaining to arsenic levels in the Petrov Lake were unreliable. The Commission’s sampling results could not be reproduced during follow-up sampling by a competent government agency representative. These additional results, which did not identify any concerns about presence of elevated arsenic, were consistent with Kumtor’s own...sampling results. However, the Commission raises valid issues relating to elevated sulphate levels below certain waste rock dumps...This issue is also noted in Kumtor’s Conceptual Closure Plan (CCP). It indicates that sulphate released from waste dumps may present a potential long-term compliance issue. However, the same CCP report also clarifies that the predicted sulphate levels are non-toxic and that the levels anticipated do not pose a serious threat to degradation of water quality in the Kumtor River...Our review of assertions contained in the Moran Comments relating to cyanide, discharges from the Effluent Treatment Plant (ETP), Kumtor’s sampling and data quality, and impacts on fishery...showed that they are without merit and speculative. Also, sampling of parameters like uranium has already taken place...and did not identify any concerns.