GB4914-2008
Effluent limitations for pollutants from offshore petroleum exploration and production
海洋石油勘探开发污染物排放浓度限值
GB 4914-2008 is a current mandatory Chinese national standard for Effluent limitations for pollutants from offshore petroleum exploration and production. It appears in the Chemicals compliance cluster with a product safety focus and has an implementation date of May 1, 2009.
Applicability depends on product scope, certification route, competent authority notices and transition rules. Requst for the translation or verify source before using this record in a compliance decision.
Compliance overview
Scope and applicability
This standard applies to the discharge management of pollutants generated during offshore petroleum exploration and production activities in China's internal waters, territorial seas, and other jurisdictional sea areas. It regulates the discharge of production water, drilling fluids, drill cuttings, domestic sewage, and solid wastes from offshore facilities. It is mandatory for all entities engaged in offshore petroleum operations in China. It does not apply to atmospheric emissions or onshore terminal wastewater, which are covered by other standards like GB 8978.
Technical requirements
The standard establishes mandatory concentration limits for various pollutants based on three sea area classifications (Tier 1, Tier 2, Tier 3), with Tier 1 being the most stringent (e.g., Bohai Sea). For production water, it specifies limits for petroleum hydrocarbons, including both single-sample allowable values and monthly average concentrations. Non-aqueous drilling fluids (oil-based and synthetic-based) are strictly prohibited from being discharged into the sea. The standard also sets limits on the oil content of water-based drilling fluids and drill cuttings, as well as maximum allowable concentrations of mercury (Hg) and cadmium (Cd) in barite. Additionally, it outlines specific requirements for the treatment and discharge of domestic sewage (including COD limits) and the disposal of solid wastes, with a complete ban on discharging industrial wastes and non-food domestic garbage into the sea.
Testing methods
The standard outlines specific analytical methods for pollutant determination. For petroleum hydrocarbons in production water, it references GB/T 17923-1999 (Infrared spectrophotometry) and an extraction-gravimetric method (Appendix A). Oil content in water-based drilling fluids and cuttings is determined using distillation or infrared spectrophotometry (Appendix B). Heavy metals like Hg and Cd in barite are measured using cold vapor atomic absorption spectrometry and atomic absorption spectrometry, respectively. COD in domestic sewage is tested using the potassium dichromate method (GB/T 11914).
FAQs
What are the key updates in GB 4914-2008 compared to the previous version?
GB 4914-2008 replaces GB 4914-1985 and introduces several key changes: it redefines sea area classifications, adds discharge limits for pollutants in drilling fluids and drill cuttings, and includes new requirements for domestic sewage and solid waste. It also adds informative appendices detailing analytical methods for extractable substances and oil content in water-based drilling fluids.
Are non-aqueous drilling fluids allowed to be discharged under GB 4914-2008?
No. The standard explicitly prohibits the discharge of non-aqueous drilling fluids (including oil-based and synthetic-based fluids) into the sea. In the Bohai Sea, the discharge of non-aqueous drilling fluid cuttings is also strictly prohibited.
How are sea areas classified for pollutant discharge limits in this standard?
Sea areas are divided into three tiers based on environmental sensitivity and distance from the nearest land. Tier 1 applies to the Bohai Sea, Beibu Gulf, and other protected marine areas or waters within 4 nautical miles of land. Tier 2 covers waters between 4 and 12 nautical miles from land (excluding Tier 1 areas). Tier 3 applies to all other sea areas.
The summary above provides a high-level overview of GB 4914-2008. To ensure complete compliance for your products and operations entering the Chinese offshore market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 4914-2008 today to access all detailed parameter tables, testing procedures, and regulatory requirements.
Applicability hints
- Type
- Environmental protection
- CCS
- Z61
- ICS
- 13.060.30
- Competent department
- Ministry of Natural Resources (Marine)
- Technical committee
- National Technical Committee on Marine of Standardization Administration of China
Relationships
Replaces:GB 4914-1985