【法规名称】
【法规编号】 79256 什么是编号？
【正 文】
第2页 CAP 358AD STATEMENT OF WATER QUALITY OBJECTIVES (WESTERN BUFFER WATER CONTROL ZONE)
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[接上页] (c) Human activity should not cause the pH of the water to exceed the range of 6.0-9.0 units. Marine waters Water Gathering Ground Subzones Other inland waters F. TEMPERATURE Human activity should not cause the natural daily temperature range to change by more than 2.0 degrees Celsius. Whole zone G. SALINITY Human activity should not cause the natural ambient salinity level to change by more than 10%. Whole zone H. SUSPENDED SOLIDS (a) Human activity should neither cause the natural ambient level to be raised by more than 30% nor give rise to accumulation of suspended solids which may adversely affect aquatic communities. (b) Human activity should not cause the annual median of suspended solids to exceed 20 mg per litre. (c) Human activity should not cause the annual median of suspended solids to exceed 25 mg per litre. Marine waters Water Gathering Ground Subzones Other inland waters I. AMMONIA The un-ionized ammoniacal nitrogen level should not be more than 0.021 mg per litre, calculated as the annual average (arithmetic mean). Whole zone J. NUTRIENTS (a) Nutrients should not be present in quantities sufficient to cause excessive or nuisance growth of algae or other aquatic plants. (b) Without limiting the generality of objective (a) above, the level of inorganic nitrogen should not exceed 0.4 mg per litre, expressed as annual water column average (arithmetic mean of at least 3 measurements at 1 m below surface, mid-depth and 1 m above seabed). Marine waters Marine waters K. 5-DAY BIOCHEMICAL OXYGEN DEMAND (a) The 5-day biochemical oxygen demand should not exceed 3 mg per litre. (b) The 5-day biochemical oxygen demand should not exceed 5 mg per litre. Water Gathering Ground Subzones Other inland waters L. CHEMICAL OXYGEN DEMAND (a) The chemical oxygen demand should not exceed 15 mg per litre. (b) The chemical oxygen demand should not exceed 30 mg per litre. Water Gathering Ground Subzones Other inland waters M. TOXIC SUBSTANCES (a) Toxic substances in the water should not attain such levels as to produce significant toxic, carcinogenic, mutagenic or teratogenic effects in humans, fish or any other aquatic organisms, with due regard to biologically cumulative effects in food chains and to interactions of toxic substances with each other. (b) Human activity should not cause a risk to any beneficial use of the aquatic environment. Whole zone Whole zone N. TURBIDITY Waste discharges should not reduce light transmission substantially from the normal level. Bathing Beach Subzones (Enacted 1993) |
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