Disposal of Gyvlon Screed

 

Because Gyvlon screed is ordered to meet the specific needs of the applicator, including part loads, site waste can be reduced to a minimum. However, an excess of screed material can occur which requires disposal in an appropriate manner. Any disposal of waste has an effect on the environment.

Respect for the environment is a core value for Lafarge. The Environment Agency provides guidelines on the disposal of waste based on the Hazardous Waste Regulations. This statement is intended as a guide for the disposal of Gyvlon screed, to be in line with these regulations and guidance.

From the 16th July 2005 high content calcium sulphate based wastes were classified as hazardous - requiring disposal in non-hazardous landfill, in specific sealed cells, where no biodegradable waste is accepted. However, the Environment Agency guidance also states that ‘if the content of the load contains small amounts of high sulphate bearing waste, eg less than 10%, it may be deposited in a non-specific cell.’ (The ‘10% rule’.)

As Gyvlon screeds only contain about 27% sulphate by volume (aggregates being the majority), our interpretation of the 10% rule is that the maximum quantity of waste screed that could be disposed of per skip is around 37% by volume. To be safe, we would recommend limiting this to a maximum of 25%.

Following consultation with the Environment Agency it is apparent that the individual disposal site has the final say on acceptance of any waste and as such it is important that the relevant disposal site is contacted with regards to disposal prior to dispatch.

If any doubt exists relating to the composition of the waste we would recommend that the Environment agency should be contacted for their advice.

Further to the above information we would recommend that the following documents available on the Environmental Agency website (www.environment-agency.gov.uk) are consulted to formulate the correct disposal procedures.

Guidance on Gypsum and High Sulphate Bearing Wastes

Landfill Guidance including Gypsum and High Sulphate Bearing Wastes

Hazardous Waste Guidance

Pre Treatment of Wastes to Non Hazardous Landfill