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<br />Based upon direct observations and interviews with key personnel, the risk to <br />local surface water quality from an unplanned pipeline breakage is extremely <br />low. Cyanide pipelines and tanks are constructed of coated steel or geosynthetic <br />materials. They are installed according to prescribed technical specifications and <br />were leak-tested prior to commissioning. This includes pre-operational testing <br />and performance testing. Anti-scaling equipment is also employed. Piping is <br />tested to ensure that welding is complete and all valves, meters, regulators, <br />guards, etc. are in sound working order. Tankage is checked for welding, <br />hydrostatic, X-Ray and sonic testing to ensure structural competency. These tests <br />include checklists and "red-tag' procedures for isolating piping system elements <br />requiring repair or replacement. Individual tank and pipeline testing reports <br />were reviewed and found to be well-documented. <br />4.8 Implement quality control quality assurance procedures to confirm <br />that cyanide facilities are constructed according to accepted <br />engineering standards and specifications. <br />~i <br />• <br />The operation is: ^ in full compliance <br />^ in substantial compliance <br />^ not incompliance ...with Standard of Practice 4.8. <br />Describe the basis for the Finding/Deficiencies Identified: <br />QA/QC records and design details for the ADR plant were reviewed, including a <br />review of the liner installation requirements including liner deployment, seaming, <br />deflection repair and testing for VLDPE and LLDPE liner installations and <br />extensions around the ADR plant in 2004. Concrete QA/QC installations and <br />certifications and earthwork specifications were also reviewed and determined to <br />be complete. <br />The CQA/ CQC program employed during VLF construction also evaluated <br />deployment, seaming, defect repair and testing of the LLDPE installation. The <br />LVCRS design concept and CQA program for a typical installation was also <br />reviewed. In all cases, construction revision details were issued as "as built" <br />drawings. The program for filling historic mine workings prior to liner <br />installation was also noted as a critical element of the overall design and CQA <br />process for VLF construction. The program is systematic and involves a number <br />Cresson Protect <br />Name of Mine <br />~~~~~ ~ <br />~/ <br />Signature of Lead Auditor <br />10 September 2007 <br />Date <br />Page 21 of 41 <br />