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'. , <br />~ <br />~` BATTLE MOUNTAIN GOLD COMPANY <br />_ SAN LUIS PROJECT <br /> TAILINGS pH ADJIISTMENT BYSTEM <br />- OPERATIONS REVIEW <br />' TABLE OF CONTENTS <br />SECTI <br />I ON <br />~.. <br />1.0 <br />INTRODIICTION <br />~1 2.0 PROCESS DESCRIPTION <br />I 3.0 <br />~ PROCESS DATA <br />' 4.0 <br />~ POTENTIAL HAZARDS <br />t <br />L 5.0 EQIIIPMENT DESCRIPTION <br />1 5.1 pH Adjustment Tank <br /> 5.2 Carbon Safety Screen <br />~. 5.3 Tailings Hopper <br />1 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 />~ 6.0 INSTRUMENTATION AND CONTROL <br /> - <br /> 6.1 Operating Controls <br /> 6.2 Interlocks <br /> 6.3 HCN Detection Equipment <br />~' 7.0 FAILIIRE ANALYSIS <br /> 7.1 Equipment Failure <br /> 7.2 Instrumentation Malfunction <br /> 7.3 Operator Error <br />~. 7.4 Cold Weather Difficulties <br />8.0 MAINTENANCE SAFETY PROCEDURES <br /> 8.1 Routine Checks <br /> 8.2 Safety Procedures <br />9.0 <br />~ EMERGENCY RESPONSE <br />, <br />9.1 Emergency Equipment <br /> 9.2 Standby Electrical Power System <br /> <br />~ APPENDI% A - Piping and Instrumentation Diagram <br />1, <br />pj/1471rp <br />012591 <br />