EWC Code
Drilling muds and other drilling wastes
EUR-Lex Commission Decision 2000/532/EC — Official Journal L 226, 06/09/2000Annual Volume
~5 Mt/year EU onshore and offshore drilling waste
Valorisation Range
Drill cuttings treatment €40–120/t; recovered base fluid €200–800/t
Primary Route
Thermal desorption / cuttings cleaning
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Get contacts for EWC 01 05EWC 01 05 covers drilling muds (water-based, oil-based and synthetic-based), drill cuttings and other wastes arising from borehole drilling in exploration, production and geothermal operations. The hazardous classification depends critically on the base fluid used: water-based muds with low additive content are generally non-hazardous (01 05 04), while oil-based and synthetic-based muds generate hazardous cuttings (01 05 05*, 01 05 06*) requiring specialist treatment.
Drill cuttings from oil-based mud (OBM) drilling are the most commercially significant stream — offshore North Sea operations generate several hundred thousand tonnes per year. Total oil on cuttings (TOC) determines treatment requirements: offshore discharge requires TOC <1% by weight per OSPAR guidelines. Thermal desorption and cuttings re-injection are the primary treatment technologies.
Geothermal drilling waste includes high-temperature brines, silica scale and naturally occurring radioactive material (NORM) in some formations. Mineral exploration cuttings are typically inert and managed as non-hazardous. EU offshore oil and gas operations are governed by Directive 2013/30/EU, with environmental provisions delegating to OSPAR for North Sea and HELCOM for Baltic operations.
Typical Generators
Established valorisation pathways for EWC 01 05, ranked by economic value and market depth. Thermal desorption / cuttings cleaning is the primary route.
Low-temperature thermal desorption recovers base oil from OBM cuttings, reducing TOC to <0.1% and allowing landfarm or permitted disposal. Recovered oil recycled into mud system. Standard technology for North Sea offshore operations.
Treated cuttings slurry injected into sub-surface formation via dedicated disposal well. Eliminates surface disposal requirement. Regulated under national offshore environmental permits; OSPAR HAZCHEM assessment required.
Water-based mud cuttings (non-hazardous) may be landfarmed (bioremediation of hydrocarbon contamination) or disposed at licensed hazardous or non-hazardous landfill depending on characterisation results.
These are the established routes for EWC 01 05. Which one your stream qualifies for depends on its composition, volume and region.
Get the ranked options for your streamPrimary & secondary off-takers
Primary generator; drilling waste management is an integral operational cost
Gas well drilling generates similar waste streams to oil operations
Drilling waste management contractors operate treatment facilities and CRI wells
Geothermal plant operators manage borehole brines and silica scale
Source: NACE Rev.2 — Eurostat, 2008
Key legislative frameworks governing EWC 01 05 classification, transport, and treatment.
Requires well integrity management and environmental risk assessment. Drilling waste disposal methods require competent authority approval. Major accident prevention linked to drilling waste injection operations.
Prohibits discharge of OBM cuttings with >1% TOC in OSPAR maritime area. Mandates use of low-toxicity synthetic base fluids where technically feasible. Applies to North Sea and northeast Atlantic operations.
Drilling waste classified as industrial waste; duty of care, waste hierarchy and consignment note requirements apply onshore. Offshore management governed additionally by OSPAR/HELCOM conventions.
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Sectors that valorise EWC 01 05 as an input material or secondary raw material.
Waste-stream pages and resources connected to EWC 01 05 valorisation.
Explore EU waste flows — Waste Atlas
Visualise 17 years of E-PRTR industrial facility data. See how EWC 01 05 and related waste streams flow across European industries and sectors.
Source: EUR-Lex Commission Decision 2000/532/EC · NACE Rev.2 — Eurostat 2008
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