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<p>Defra's national monitoring network does not monitor hydrogen sulphide levels.</p><p>The
Environment Agency (EA) monitors specific sites within the Newcastle-under-Lyme area.
In particular, on the Walley's Quarry Landfill site, the EA carried out an ambient
air monitoring study between January 2019 and June 2019. The EA deployed a Mobile
Monitoring Facility (MMF) to the north of Walleys landfill site between 15 January
2019 and 12 February 2019. Comparison of the hydrogen sulphide data with the World
Health Organization’s (WHO) guidelines showed that concentrations were below health
limits but exceeded odour limits for 6% of this monitoring period. The MMF was then
relocated approximately 60 metres to the east between 28 February 2019 and 25 June
2019. Comparison of the hydrogen sulphide data with the WHO guidelines showed that
concentrations were below health limits but exceeded odour limits for 1% of the monitoring
period.</p><p>The EA will be continuing with its regular odour assessments and site
inspections and will take appropriate action as part of its regulation of the Walley's
Quarry Landfill site, should it identify any areas where the Operator is not compliant
with their permit conditions.</p>
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