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v�rCuc� � e�,<< GCS 8�a� 6g <br /> l <br /> Lazuk, Raymond <br /> ' James <br /> Eric, <br /> As I mentioned to you during your visit last week, we continue to see pH below the NPL range of 6.5 to 8.5 at GW#2. <br /> During our third quarter compliance monitoring on 07/23/2018 we measured pH at GW#2 at 6.1. We conducted a <br /> confirmation measurement on 08/20/2018 with a result of 6.2. The measurements from our monthly pH monitoring that <br /> began in April are as follows: <br /> 04/16/2018 6.18 <br /> 04/19/2018 6.07 <br /> 05/9/2018 6.24 <br /> 06/14/2018 6.3 <br /> 07/23/2018 6.09 <br /> 08/20/2018 6.22 <br /> Historically, the pH has been variable and we expect to see values again within the NPL range. Our plan for now is to <br /> continue to monitor pH monthly to determine if levels increase over time. We will advise you if we see a decreasing <br /> trend from what we have observed over the past five months so that we can develop an action plan to investigate <br /> potential causes for this change. <br /> Please let us know if you need us to do anything further at this time. <br /> Thank you, <br /> - Ray <br /> Raymond Lazuk <br /> Environmental Manager <br /> Climax Mine <br /> Hwy 91 — Fremont Pass <br /> Climax, CO 80429 <br /> Office: 719-486-7584 <br /> Cell: 719-201-1282 <br /> rlazuk@fmi.com <br />