Land Contamination: Technical Guidance on Special Sites: Acid Tar ...

LeachingLimeMethaneMercaptansNeopreneNeutralisationNoxiousOleumOrganic acidsDissolution of chemicals from waste materials into a liquid(typically water) and their subsequent removal away from thecontaminated zone (e.g. towards groundwater).Compounds mostly of calcium carbonates but also other basic(alkaline) substances.A colourless non-poisonous, flammable gas creating by anaerobicdecomposition of organic compounds.A group of organic compounds that contain sulphur (S) and arecharacterised by an offensive odours, sometimes likened to rottingcabbage.A synthetic rubber-like polymer.Decreasing the acidity or alkalinity of a substance by addingalkaline or acidic materials, respectively.Harmful, unwholesome.Concentrated sulphuric acid containing excess sulphur trioxide insolution forming a dense corrosive liquid.Acids compose of carbon (C) and (H) atoms.Paraffins Saturated aliphatic hydrocarbons with molecular formula C n H 2n-2PAHs Polycyclic aromatic hydrocarbons. Complex, multi-ringedhydrocarbons of moderate to high molecular weight, moderate tolow mobility in the environment and moderate to high toxicity.Petroleum fractionspHPhenolsPneumaticPolymersPPEPTFEA fraction of crude oil products removed from the rest of the crudeoil through distillation.The representation of the acidity or alkalinity of a substance on alogarithmic scale of 0 to 14 based on hydrogen ion concentration.Organic compounds that are by products of petroleum refining,tanning and textiles, dye and resin manufacturing.Containing or operated by compressed air.A natural or synthetic chemical structure where two or more likemolecules are joined to form a more complex molecular structure.Personal Protective EquipmentPolytetrafluoroethene.R&D <strong>Technical</strong> Report P5-042/TR/04iv