I am writing to request information under the Freedom of Information Act 2000 relating to gas emissions data collected from the Withyhedge Landfill site in Pembrokeshire, particularly from the monitoring station at Spittal School in Haverfordwest. Specifically, I would like to request the following: 1. Odourless carcinogenic gases or toxic substances: Please provide information on any odourless cancer-causing gases or toxins that have been recorded above acceptable or safe levels from October 1st, 2023 to the present date. o This should include the number of times such spikes occurred. o The type of substance detected. o The level recorded during each spike. o The threshold or guideline level that was exceeded in each case. 2. Hydrogen Sulphide (H₂S) and Sulphur Dioxide (SO₂) levels: Please provide the monthly average levels of Hydrogen Sulphide and Sulphur Dioxide emissions recorded from Withyhedge Landfill since October 1st, 2023. 3. Measurement location: Please ensure the data includes or is broken down by the monitoring sensor installed at Spittal School in Haverfordwest. 4. Data presentation: We would like this information to be provided in an easy-to-understand format, ideally as a table or chart showing monthly averages and any exception events or spikes as separate entries. If possible, please also confirm: * The dates on which monitoring began at the Spittal School location. * Whether the sensor has undergone any maintenance or calibration that may affect data continuity.