(JP2803725-B2)      Soil contaminated with halogenated aliphatic and aromatic hydrocarbons (I) is bio-remediated by stimulating indigenous bacteria, reducing (I) to levels of less than 1 ppm in 8 weeks, by (i) analysing the soil to determine level of specified constituents (II); (ii) forming a bioremediation composition (III) containing (II) in amounts that, together with those already in the soil, will form a solution of composition (IV); (iii) introducing (III) to the soil to provide 20-30 wt.% total moisture in the soil (where the soil contains microorganism from a specified list); and monitoring (II) in the soil and adding as necessary to maintain desired concentration. (IV) contains, by wt. in the contaminated soil: (a) 75-250 ppm Mg, Ca, ammonium or ferrous sulphate; (b) 30-100 ppm iron derivatives comprising chelated iron, citrated iron, electrolyte iron and/or ferrous sulphate; (c) 50-75 ppm sodium benzoate; (d) 1-5 g/l glacial till (diatomaceous earth and/or siliceous skeletons); (e) 1-5 g/l yeast extract; (f) ammonia or urea, 5-20 parts per 100 parts indigenous carbon; (g) orthophosphate or mono ammonium phosphate, 1 part per 100 parts indigenous carbon; and (h) 1-5 parts 2-butoxyethanol (surfactant).    USE -   The composition is used to stimulate indigenous bacteria, which as part of their active cycle degrade harmful and toxic chemical wastes.    ADVANTAGE -   The growth and degrading activities of indigenous anaerobic, aerobic and facultative bacteria are highly stimulated, resulting in the biodegradation of contaminants such as halogenated contaminants being degraded in shorter time intervals, and as the composition allows the bacteria to expand, higher levels of contaminants can be metabolised. The bi-product of the metabolism is ethane and/or ethene, which is less harmful than vinyl chloride.    (JP10225677-A)      Soil contaminated with halogenated aliphatic and aromatic hydrocarbons (I) is bio-remediated by stimulating indigenous bacteria, reducing (I) to levels of less than 1 ppm in 8 weeks, by (i) analysing the soil to determine level of specified constituents (II); (ii) forming a bioremediation composition (III) containing (II) in amounts that, together with those already in the soil, will form a solution of composition (IV); (iii) introducing (III) to the soil to provide 20-30 wt.% total moisture in the soil (where the soil contains microorganism from a specified list); and monitoring (II) in the soil and adding as necessary to maintain desired concentration. (IV) contains, by wt. in the contaminated soil: (a) 75-250 ppm Mg, Ca, ammonium or ferrous sulphate; (b) 30-100 ppm iron derivatives comprising chelated iron, citrated iron, electrolyte iron and/or ferrous sulphate; (c) 50-75 ppm sodium benzoate; (d) 1-5 g/l glacial till (diatomaceous earth and/or siliceous skeletons); (e) 1-5 g/l yeast extract; (f) ammonia or urea, 5-20 parts per 100 parts indigenous carbon; (g) orthophosphate or mono ammonium phosphate, 1 part per 100 parts indigenous carbon; and (h) 1-5 parts 2-butoxyethanol (surfactant).    USE -   The composition is used to stimulate indigenous bacteria, which as part of their active cycle degrade harmful and toxic chemical wastes.    ADVANTAGE -   The growth and degrading activities of indigenous anaerobic, aerobic and facultative bacteria are highly stimulated, resulting in the biodegradation of contaminants such as halogenated contaminants being degraded in shorter time intervals, and as the composition allows the bacteria to expand, higher levels of contaminants can be metabolised. The bi-product of the metabolism is ethane and/or ethene, which is less harmful than vinyl chloride.    (WO9966080-A1)      Soil contaminated with halogenated aliphatic and aromatic hydrocarbons (I) is bio-remediated by stimulating indigenous bacteria, reducing (I) to levels of less than 1 ppm in 8 weeks, by (i) analysing the soil to determine level of specified constituents (II); (ii) forming a bioremediation composition (III) containing (II) in amounts that, together with those already in the soil, will form a solution of composition (IV); (iii) introducing (III) to the soil to provide 20-30 wt.% total moisture in the soil (where the soil contains microorganism from a specified list); and monitoring (II) in the soil and adding as necessary to maintain desired concentration. (IV) contains, by wt. in the contaminated soil: (a) 75-250 ppm Mg, Ca, ammonium or ferrous sulphate; (b) 30-100 ppm iron derivatives comprising chelated iron, citrated iron, electrolyte iron and/or ferrous sulphate; (c) 50-75 ppm sodium benzoate; (d) 1-5 g/l glacial till (diatomaceous earth and/or siliceous skeletons); (e) 1-5 g/l yeast extract; (f) ammonia or urea, 5-20 parts per 100 parts indigenous carbon; (g) orthophosphate or mono ammonium phosphate, 1 part per 100 parts indigenous carbon; and (h) 1-5 parts 2-butoxyethanol (surfactant).    USE -   The composition is used to stimulate indigenous bacteria, which as part of their active cycle degrade harmful and toxic chemical wastes.    ADVANTAGE -   The growth and degrading activities of indigenous anaerobic, aerobic and facultative bacteria are highly stimulated, resulting in the biodegradation of contaminants such as halogenated contaminants being degraded in shorter time intervals, and as the composition allows the bacteria to expand, higher levels of contaminants can be metabolised. The bi-product of the metabolism is ethane and/or ethene, which is less harmful than vinyl chloride.