GB 18420.1-2009: Translated English of Chinese Standard. GB18420.1-2009: Biological toxicity for pollutants from marine petroleum exploration and exploitation - Part 1: Grading
https://www.chinesestandard.net, 2014 M11 20 - 8 pages
This Part specifies the frequency and limit of biological toxicity test in different sea-areas of some pollutants that are used or generated during the marine petroleum exploration and exploitation operation; and are discharged into the ocean. And it puts forward the requirements to test methods and result judgments of the samples. This Part applies to biological toxicity grading of drilling fluid, base fluid, drilling cuttings, and produced water that are used or generated AND discharged into the ocean, during the marine petroleum exploration and exploitation operation. For those pollutants not defined in this Part, the biological toxicity grading may reference to this Part for the use.
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Biological toxicity grading