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2011-10-12_INSPECTION - M1980244
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2011-10-12_INSPECTION - M1980244
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Last modified
8/24/2016 4:43:58 PM
Creation date
10/13/2011 7:11:35 AM
Metadata
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Template:
DRMS Permit Index
Permit No
M1980244
IBM Index Class Name
INSPECTION
Doc Date
10/12/2011
Doc Name
Insp Rpt
From
DRMS
To
CC&V
Inspection Date
9/21/2011
Email Name
BMK
Media Type
D
Archive
No
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OBSERVATIONS <br />PERMIT #: M- 1980 -244 <br />INSPECTOR'S INITIALS: BMK <br />INSPECTION DATE: September 21, 2011 <br />1) The Division conducted a monitoring and construction progress inspection of the site on 9/21/11. Present during <br />the inspection were Tim Comer of CC &V and Joe Hickey of Amec the design engineer's representative, <br />conducting the QA /QC for the construction portion of the operation. <br />2) The Phase V leach pad construction area was inspected. Along the upper portion of the south facing slopes <br />north of the pregnant pond, clay, geomembarne and drain cover were being deployed at different portion of the <br />pad. The deployed liner was walked and inspected and found to be in good repair. According to Joe Hickey <br />Ames construction plans to complete as much if not all the liner deployment before the end of this construction <br />season. While in the area Kim Morrison of AMEC, the design engineer for Phase 6 ( AM 10) met us in the area to <br />discuss the yearly slope stability inspection that CC &V is required to conduct on the existing leach facility. The <br />Division requested for her evaluation to include impacts of the hydro jex process on the overall slope stability of <br />the pad. She agreed to include that in her slope stability evaluation of the pad. <br />3) The inspection continued to the existing valley heap leach pads I thru V. The pads were actively being leached at <br />the time of the inspection. The phase IVC pad inter phase ditch area was inspected and found to be in good <br />repair. CC &V is going to submit a TR to extend the berm along this area. While inspecting the pad, the following <br />readings were collected from the pregnant ponds high and low solution collection pressure transducers. <br />4) Phase I high volume solution collection transducer # 1 was recorded at 25.0 # 2 was at 41.0 and # 3 was at 41.6. <br />The low volume solution collection transducer # 1 was at 0.34 and # 2 was at 0.41. The piezometers for the pond <br />was at 44.5 for # 1 and 31.5 for # 2. The phase II high volume solution collection transducer # 4 was recorded at <br />13.0 # 5 was at 14.0 and # 6 was at 13.9. The low volume solution collection transducer # 1 was recorded at 0.50 <br />and # 2 was at 0.71. The phase IV High volume solution collection transducer # 7 was recorded at 12.4 # 8 was at <br />11.0 # 9 was at 10.4 and # 10( pipe) was at 9.7.The low volume solution collection transducer # 1 recorded at <br />12.6 and # 2 was at 12.7 inches of hydro static head. The phase V high volume solution collection transducer # <br />311 was recorded at 12.94 # 312 was at 13.09 # 313 was at 13.02 and # 314 was at 12.94. The low volume <br />solution collection transducer # 1 was recorded at 12.3 and # 2 was at 13.1 inches of hydrostatic head.( All other <br />pressure transducer readings are in feet of hydrostatic head) <br />5) The external pond was inspected. It was holding about the same amount of water as observed during the last <br />inspection. The low volume solution collection transducer for the pond were at 9.7 for # 1 and 15.6 for # 2. The <br />under drain discharge area was inspected. Both the south and 4 inch pipes were discharging. All the water from <br />these ponds is pumped back to the heap leach as make up water All the lower ponds were dry with the <br />exception of the large lower pond which was holding a very small amount of water. After the inspection <br />discussed the next sampling time in Areqau and under drain. CC &V is going to drill a deeper aquifer well after <br />samples are collected. The deep well will have the same numeric protection levels as the upper aquifer well <br />CRMW -3B, which is a compliance well. The sulfate standards set by the Division for this well had exceeded the <br />numeric protection levels twice in 2011. The Division has been working with the operator on the appropriate <br />remedial action such as pumping back the 1.5 gpm total yield to the pump back station as make up water. <br />Page 2 of 4 <br />
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