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.'= . • <br />_• BATTLE MOUNTAIN GOLD COMPANY <br />BAN LUIS PROJECT <br />,. <br />TAILINGS pH ADJIISTMENT SYSTEM <br />- OPERATIONS REVIEW <br />~~ TABLE OF CONTENTS <br />I_ <br />SECTION <br />1.0 <br />2.0 <br />3.0 <br />4.0 <br />5.0 <br />6.0 <br />7.0 <br />8.0 <br />r. <br />i. <br />9.0 <br />INTRODIICTION <br />PROCESS DESCRIPTION <br />PROCESS DATA <br />POTENTIAL HAZARDS <br />EQIIIPMENT DESCRIPTION <br />5.1 pH Adjustment Tank <br />5.2 Carbon Safety Screen <br />5.3 Tailings Hopper <br />5.4 Ducting <br />5.5 Fume Scrubber and Stack <br />5.6 Sodium Hydroxide Storage Tank <br />5.7 Sodium Hydroxide Metering Pumps <br />5.8 Sulfuric Acid Storage Tank <br />5.9 Sulfuric Acid Metering Pump <br />INSTRUMENTATION AND CONTROL <br />6.1 Operating Controls <br />6.2 Interlocks <br />6.3 HCN Detection Equipment <br />FAILIIRE ANALYSIS <br />7.1 Equipment Failure <br />7.2 Instrumentation Malfunction <br />7.3 Operator Error <br />7.4 Cold Weather Difficulties <br />MAINTENANCE SAFETY PROCEDURES <br />8.1 Routine Checks <br />8.2 Safety Procedures <br />EMERGENCY RESPONSE <br />9.1 Emergency Equipment <br />9.2 Standby Electrical Power System <br />APPENDIX A - Piping and InstrumentationlDiagram <br />pj/1471rp 012591 <br />