At Sterling, safety and compliance are of paramount importance to us, and we are committed to protecting our employees, our customers’ projects, and the communities we are part of.

Our Cramlington, UK site is an upper tier Control of Major Accident Hazards (COMAH) site, which means that we have facilities to handle, process and store significant quantities of hazardous substances.

Our waste treatment facility was last audited by the Environment Agency in December 2022 and our effluent is regularly monitored by Northumbrian Water. Residing within our parent company’s pharmaceutical contract development and manufacturing site, our site is also audited by regulators including the MHRA and FDA, and conforms to current Good Manufacturing Practice (cGMP) standards.


Our waste treatment site also benefits from:

  • On-site emergency response team
  • Two emergency response vehicles
  • 24-hour security team
  • Comprehensive CCTV system
  • Dedicated Dangerous Goods Safety Advisor (DGSA)
  • CIWM (WAMITAB) certified Plant Manager
  • ISO 14001 and ISO 45001

Accepted European Waste Catalogue (EWC) codes

We accept 430 European Waste Catalogue (EWC) codes and complete testing in our on-site waste analysis laboratory to determine whether your waste is suitable for our aerobic plant or anaerobic plant.

Indicative waste types accepted include:

  • Alcohols (e.g. brewery wastes, wine, gin, hand sanitiser, methanol, ethanol, IPA, butanols etc)
  • Industrial reagents (AdBlue, antifreeze, monoethylene glycol, polyethylene glycol)
  • Liquid food and drink waste
  • Organic and hydrocarbon or petroleum waste streams (e.g. tank cleaning, process water from solvent recovery, pharmaceutical wastes, paint industry etc)
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  • Water miscible solvents
  • Interceptor waste
  • Shipping wastewater washings
  • Liquids with minimal solids (treatment plant dependent)
  • Leachates and run-off water
  • Contaminated fire water
  • Agricultural wastewater
  • Pharmaceutical and organic chemical manufacturing waste
  • Mining, drilling and civil wastewater
  • Engineering/machining water soluble oils


Solvent and aqueous waste treated in our aerobic plant is given a D08 waste disposal code, whilst our anaerobic plant provides an R03 waste recovery code. This is determined under the Waste Framework Directive in support of waste materials up the waste hierarchy and of companies’ environmental, social and governance strategies.

Waste treatment permits and licenses

Our Environment Agency (EA) Environmental Permitting Regulations (EPR) license number is AP3234LG and Northumbrian Water Limited (NWL) T.E. consent number is N2729.

If you would like any further information or a copy of our Duty of Care pack, please click here to get in touch with a member of our team.