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2020-08-03_REVISION - M1980244 (11)
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2020-08-03_REVISION - M1980244 (11)
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Last modified
8/10/2020 9:44:20 AM
Creation date
8/10/2020 8:31:25 AM
Metadata
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Template:
DRMS Permit Index
Permit No
M1980244
IBM Index Class Name
Revision
Doc Date
8/3/2020
Doc Name
Adequacy Review - Preliminary
From
CC&V
To
DRMS
Type & Sequence
AM13
Email Name
TC1
MAC
ERR
JPL
BFB
Media Type
D
Archive
No
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ICMC RECERTIFICATION SUMMARY AUDIT REPORT <br /> <br />the cyanide mixing and storage tanks out of cast in place reinforced concrete. In addition, the secondary <br />containments are underlain by a LLDPE geomembrane liner acting as a tertiary containment system. The <br />secondary containments have a sump with a dedicated automatic pump at the three process areas to return <br />any spilled material collected in the secondary containments to the cyanide storage tanks. The ADR1 <br />geomembrane liner is sloped to VLF1, and the ADR2 and HGM geomembrane liner is sloped to VLF2. The <br />cyanide offload pads and secondary containments provide adequate containment for the recovery of cyanide <br />liquid spills. The auditors observed the cyanide offload pads and secondary containments of the cyanide <br />mixing and storage tanks to be in good condition. <br />CC&V has installed level indicators and high-level alarms to prevent the overfilling of the cyanide mixing and <br />storage tanks at ADR1, ADR2, and the HGM. Interlock system with automatic shut off valves that prevents <br />overfilling of the tanks have been installed at the ADR2 and HGM tanks. No changes or modifications have <br />been made to the ADR1 cyanide mixing and storage tanks since the 2014 recertification audit. The auditors <br />observed screen shots in the control room to verify that the level sensors were working. In addition, the <br />auditors reviewed completed monthly preventative maintenance records for tank level indicators and level <br />alarms for the recertification period. CC&V has also implemented procedures to prevent overfilling. The <br />CC&V reagent operator verifies that the tank levels are low enough to receive the expected delivery. In <br />addition, the cyanide supplier, Cyanco, has remote telemetry monitoring of the cyanide tank levels to track <br />cyanide usage and inventory, allowing them to dispatch cyanide loads when needed. Tank levels before and <br />after cyanide offloading are documented on checklists, as well as on the Cyanco bills of lading. <br />All the cyanide mixing and storage tanks are located apart from foods, animal feeds, acids, strong oxidizers, <br />and explosives; smoking is prohibited and signed accordingly. The cyanide mixing and storage tanks at <br />ADR1, ADR2, and the HGM are located within their own containments. <br />Standard of Practice 3.2: Operate unloading storage and mixing facilities using inspections, <br />preventative maintenance, and contingency plans to prevent or <br />contain releases and control and respond to worker exposures. <br />CC&V is: <br /> in full compliance with <br />Standard of Practice 3.2 in substantial compliance with <br /> not in compliance with <br />Summarize the basis for this finding: <br />The operation is in FULL COMPLIANCE with Standard of Practice 3.2; operate unloading storage and <br />mixing facilities using inspections, preventative maintenance, and contingency plans to prevent or contain <br />releases and control and respond to worker exposures. <br />Cyanide is delivered in fully enclosed steel ISO containers. The liquid cyanide is transferred from the ISO <br />containers to the cyanide mixing and storage tanks. The ISO containers are used only for the delivery (and <br />mixing of the cyanide when the Cyanco SLS process was in use); therefore, no empty cyanide containers <br />require disposal or treatment. The empty ISO containers are returned to Cyanco immediately after the <br />offloading is completed. <br />The Procedures for Cyanide Truck Unloading: Solid Product requires that a triple rinse of the ISO container <br />be conducted once the transfer of the cyanide is completed. The CC&V reagent operator must also inspect <br />the ISO container with the driver to ensure that the load has been completely dissolved. The driver signs and <br />dates a “Certificate of Cleanliness” certifying that the ISO container has been triple rinsed with fresh water. <br />Estimated residue left in trailer is documented on the “NaCN Batch Record” checklist and signed by the <br />driver and the CC&V reagent operator. In the case of the offloading of liquid cyanide, the Procedures for <br />Cyanide Truck Unloading: Liquid Product requires that a general inspection of the ISO container is <br />conducted of the top and sides of the ISO containers to ensure that spillage or leaks have not occurred <br />during the offloading and disconnecting activities. This inspection is documented on the “NaCN Batch <br />Record” checklist and signed by the driver and the CC&V reagent operator. The auditors observed an offload <br />CC&V Mine <br />Name of Facility __________________________________ <br />Signature of Lead Auditor <br />July 28, 2017 <br />Date <br />July 2017 <br />Report No. 1663584-003-R-Rev0 7
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