GB18668-2002

Marine sediment quality

海洋沉积物质量

GB 18668-2002 est une norme nationale chinoise obligatoire en vigueur : Marine sediment quality. Secteur : Environnement. Thème principal : Sécurité des produits. Entrée en vigueur : 1 oct. 2002.

L’applicabilité dépend du périmètre du produit, de la voie de certification, des avis des autorités et des règles de transition. Demandez une traduction ou vérifiez la source avant d’utiliser cette fiche pour une décision de conformité.

Aperçu de conformité

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Champ d’application

This standard is applicable to all marine areas under the jurisdiction of the People's Republic of China. It specifies the marine sediment quality requirements for various sea area usage functions. This standard is mandatory for all marine environmental monitoring and development projects. It categorizes marine sediments into three classes based on different usage functions and environmental protection goals, ranging from marine fisheries and nature reserves to industrial water zones and port waters.

Exigences techniques

The standard classifies marine sediment quality into three categories, each with specific limits for various physical, chemical, and biological parameters. It mandates that the seabed must be free of industrial and domestic waste, abnormal color, and odor, maintaining a natural structure. For biological indicators, the standard sets strict limits on coliform bacteria, fecal coliforms, and pathogens, particularly for sediments in shellfish farming areas intended for raw human consumption. Regarding chemical pollutants, the standard specifies maximum concentration limits for heavy metals such as mercury, cadmium, lead, and copper. It also regulates organic compounds, including organic carbon, sulfides, petroleum hydrocarbons, and persistent organic pollutants like PCBs and *HCH* (hexachlorocyclohexane). Compliance with these specific numerical limits is essential for environmental approval.

Méthodes d’essai

The standard outlines the analytical methods for marine sediment samples, referencing *GB 17378.5-1998*, *GB 17378.7-1998*, and *GBJ 48-1983*. It details procedures for sample collection, preparation, and preservation. Testing methods include cold atomic absorption spectrophotometry for mercury, flameless atomic absorption spectrophotometry for heavy metals, and gas chromatography for organic pollutants. Specific detection limits are established for each analytical method to ensure accuracy.

Questions fréquentes

What products or projects are regulated under GB 18668-2002?

GB 18668-2002 regulates the quality of marine sediments in all sea areas under China's jurisdiction. It applies to marine fisheries, nature reserves, industrial water zones, and port development projects.

Is GB 18668-2002 a mandatory standard?

Yes, all technical content within GB 18668-2002 is mandatory. Compliance is legally required for relevant marine activities in China.

How are marine sediments classified in this standard?

Marine sediments are classified into three categories based on usage functions: Class I for fisheries and nature reserves, Class II for general industrial and tourism use, and Class III for port waters and special marine operations.

The summary above provides a high-level overview of GB 18668-2002. To ensure complete compliance for your marine projects in the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of *GB 18668-2002* today to access all detailed parameters, tables, and testing procedures.

Indications d’applicabilité

Type: Protection de l’environnement
CCS: Z50
ICS: 13.060.01
Autorité compétente: Ministry of Natural Resources (Marine)
Comité technique: National Technical Committee on Marine of Standardization Administration of China