TAILIEUCHUNG - ORGANIC CHEMICALS

The presence of substances in groundwater may be affected by naturally occurring processes as well as by actions directly associated with human activities. Naturally occurring processes such as decomposition of organic material in soils or leaching of mineral deposits can result in increased concentrations of several substances. Those of health concern include arsenic, fluoride, selenium, uranium, nitrate, metals, and radionuclides such as radon. Problems of aesthetic quality and acceptance may be caused by iron, manganese, sulphate, chloride and organic matter. . | Chapter 29 ORGANIC CHEMICALS 2901 Acyclic hydrocarbons Acyclic hydrocarbons saturated kg Acyclic hydrocarbons saturated Acyclic hydrocarbons unsaturated ethylene kg Acyclic hydrocarbons unsaturated ethylene Acyclic hydrocarbons unsaturated propene propylene kg Acyclic hydrocarbons unsaturated propene propylene Acyclic hydrocarbons unsaturated butene butylene and isomers thereof kg Acyclic hydrocarbons unsaturated butene butylene and isomers thereof Acyclic hydrocarbons unsaturated buta-1 3-diene and isoprene kg Acyclic hydrocarbons unsaturated buta-1 3-diene and isoprene Acyclic hydrocarbons unsaturated . in heading no. 2901 kg Acyclic hydrocarbons unsaturated . in heading no. 2901 - - Amendment Set No. 1 Chapter 29 ORGANIC CHEMICALS. 2902 Cyclic hydrocarbons Cyclic hydrocarbons cyclohexane kg Cyclic hydrocarbons cyclohexane Cyclic hydrocarbons cyclanes cyclenes and cycloterpenes excluding cyclohexane kg Cyclic hydrocarbons cyclanes cyclenes and cycloterpenes excluding cyclohexane Cyclic hydrocarbons benzene kg Cyclic hydrocarbons benzene Cyclic hydrocarbons toluene kg Cyclic hydrocarbons toluene Cyclic hydrocarbons o-xylene kg Cyclic hydrocarbons o-xylene Cyclic hydrocarbons m-xylene kg Cyclic hydrocarbons m-xylene Cyclic hydrocarbons p-xylene kg Cyclic hydrocarbons p-xylene Cyclic hydrocarbons mixed xylene isomers kg Cyclic hydrocarbons mixed xylene isomers Cyclic hydrocarbons styrene kg Cyclic hydrocarbons styrene Cyclic hydrocarbons ethylbenzene kg Cyclic hydrocarbons ethylbenzene Cyclic hydrocarbons cumene kg Cyclic hydrocarbons cumene Amendment Set No. 1 - - Chapter 29 .

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