Proposed Limpopo West Mine Concept Study ... - SRK Consulting

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SRK Consulting: 447493: Limpopo West GeochemPage ixDisclaimerThe opinions expressed in this Report have been based on the information supplied to SRKConsulting (South Africa)(Pty) Ltd (SRK) by Sasol Mining Pty (Ltd) (Sasol). The opinions in thisReport are provided in response to a specific request from Sasol to do so. SRK has exercised alldue care in reviewing the supplied information. Whilst SRK has compared key supplied data withexpected values, the accuracy of the results and conclusions from the review are entirely reliant onthe accuracy and completeness of the supplied data. SRK does not accept responsibility for anyerrors or omissions in the supplied information and does not accept any consequential liability arisingfrom commercial decisions or actions resulting from them. Opinions presented in this report apply tothe site conditions and features as they existed at the time of SRK’s investigations, and thosereasonably foreseeable. These opinions do not necessarily apply to conditions and features thatmay arise after the date of this Report, about which SRK had no prior knowledge nor had theopportunity to evaluate.GOGP/LAKJ Report_April2013_19April2013 (1)_Final_Ludi_22052013 April 2013
SRK Consulting: 447493: Limpopo West GeochemPage xAcidificationAlkalinityNeutralising(NP)AquiferGlossary, Acronyms and AbbreviationsConcession areaDischargeDisposalDumpEffluentExposure pathwaysHazardous materialsLeachingPotentialOpen cast (open pit)miningOpen pitOreOre bodypHRiskRunoffThe decrease of acid neutralizing capacity in water, or base saturation in soil,caused by natural or anthropogenic processes. Acidification is exhibited as thelowering of pH, a process that can adversely affect aquatic life.A measure of water’s capacity to neutralize an acid. It indicates the presence ofcarbonates, bicarbonates and hydroxides, and less significantly, borates,silicates, phosphates and organic substances. It is expressed as an equivalentof calcium carbonate. The composition of alkalinity is affected by pH, mineralcomposition, temperature and ionic strength. However, alkalinity is normallyinterpreted as a function of carbonates, bicarbonates and hydroxides. The sumof these three components is called total alkalinity.The equivalent capacity of a solution to neutralize acids, either introduced intothe system or as a result of natural acid generating reactions.A rock layer or sequence that contains water and releases it in appreciableamounts.A grant of land or property especially by a government in return for services orfor a particular use.Release of potentially of water from mining or processing activity to thereceiving environment. This can either be contaminating or non-contaminating.Final placement of wastes; surplus chemicals, polluted soils and drumscontaining hazardous materials from removal actions or accident releases.A pile of broken waste rock or overburden on surface.An out flowing of water from a man-made structure, typically a processing plantThe physical route by which a contaminant moves from a source to a biologicalreceptor. A pathway may involve exchange among multiple media and mayinclude transformation of the contaminant.Materials in quantities that may harm persons, property or the environment.A chemical process for the extraction of valuable minerals from ore; also, anatural process by which ground waters dissolve minerals, thus leaving the rockwith a smaller proportion of some of the minerals than it contained originally.Also, a test methodology used to simulate natural processes that occur in wasterock.A method of extracting rock or minerals from the earth by their removal from anopen pit. The term is used to differentiate this form of mining from extractivemethods that require tunneling into the earth.A mine that is entirely on surface. Also referred to as open-cut or open-castmine.A mixture of ore minerals and gangue (valueless and undesirable material, suchas quartz in small quantities, in an ore) from which at least one of the oreminerals can be extracted at a profit or that is economically feasible for mining.A natural concentration of a valuable mineral or minerals that can be extractedand sold at a profit.The negative logarithm of the hydrogen ion activity, pH is an indication of theacidic or basic, i.e., alkaline, nature of water. Neutral water has a pH of seven.The potential hydrogen scale, measuring the acidity or alkalinity of a solution,from zero (highly acidic) to 14 (highly alkaline).A measure of the likelihood and the consequence severity with a hazardoccurring.The water from rain that flows over the land surface and is not absorbed into theground, instead flowing into streams or other surface waters or landdepressions.GOGP/LAKJ Report_April2013_19April2013 (1)_Final_Ludi_22052013 April 2013
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Proposed Limpopo West Mine Concept Study ... - SRK Consulting

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