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In January 1992, there was a major pollution incident involving highly acidic wastes. CEH, in conjunction with the University of Reading monitored the River Carnon between September 1992 and April 1994, to examine the water quality. 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Samples were returned to the Wallingford Laboratories for processing. Unfiltered samples were used for pH and alkalinity determination and samples were kept in filled glass bottles prior to analysis in order to minimise carbon dioxide changes (degassing in particular) that would affect the pH reading. Subsamples were filtered through 0.45 micrometer cellulose nitrate membranes and samples were stored prior to metal analysis after acidification to 1% with concentrated high purity nitric acid. For anions and nutrients (including silicon and ammonium), the samples were stored without acidification. Polypropylene bottles were used for storage and these bottles were cleaned with 10% hydrochloric acid and subsequently rinsed with distilled water. The samples were stored at 4 degrees C in the dark. Sampling and analysis was carried out by CEH in conjunction with the University of Reading. Water quality was monitored the River Carnon as part of a CEH science budget project. All the measurements and data collation were undertaken by CEH staff.","metadataDate":"2026-06-29T18:23:09","notGEMINI":false,"onlineResources":[{"url":"https://data-package.ceh.ac.uk/data/5609a35a-c360-4125-b122-1fa1475e0e2d","name":"Download the data","description":"Get a copy of this data","function":"download","type":"OTHER"},{"url":"https://data-package.ceh.ac.uk/sd/5609a35a-c360-4125-b122-1fa1475e0e2d.zip","name":"Documents","description":"Documents available to assist with the reuse of this data.","function":"information","type":"OTHER"}],"pointsOfContact":[{"familyName":"Neal","givenName":"Colin","organisationName":"UK Centre for Ecology & Hydrology","organisationIdentifier":"https://ror.org/00pggkr55","role":"pointOfContact","email":"enquiries@ceh.ac.uk","fullName":"Neal, C.","pointOfContact":"UK Centre for Ecology & Hydrology"}],"publicationDate":"2013-06-30T00:00:00.000Z","resourceIdentifiers":[{"code":"1293034185767","codeSpace":"CEH:EIDC:"},{"code":"https://catalogue.ceh.ac.uk/id/5609a35a-c360-4125-b122-1fa1475e0e2d"}],"resourceMaintenance":[{"frequencyOfUpdate":"notPlanned"}],"resourceType":{"value":"dataset"},"responsibleParties":[{"familyName":"Neal","givenName":"C.","organisationName":"Centre for Ecology & Hydrology","organisationIdentifier":"https://ror.org/00pggkr55","role":"author","email":"enquiries@ceh.ac.uk","fullName":"Neal, C."},{"familyName":"Neal","givenName":"Colin","organisationName":"UK Centre for Ecology & Hydrology","organisationIdentifier":"https://ror.org/00pggkr55","role":"pointOfContact","email":"enquiries@ceh.ac.uk","fullName":"Neal, C.","pointOfContact":"UK Centre for Ecology & Hydrology"},{"organisationName":"Natural Environment Research Council","organisationIdentifier":"https://ror.org/02b5d8509","role":"owner","email":"enquiries@ceh.ac.uk","address":{"deliveryPoint":"Polaris House, North Star Avenue","city":"Swindon","postalCode":"SN2 1EU","country":"UK"}},{"organisationName":"NERC EDS Environmental Information Data Centre","organisationIdentifier":"https://ror.org/04xw4m193","role":"custodian","email":"info@eidc.ac.uk"},{"organisationName":"UK Centre for Ecology & Hydrology","organisationIdentifier":"https://ror.org/00pggkr55","role":"rightsHolder","email":"enquiries@ceh.ac.uk"}],"rightsHolders":[{"organisationName":"UK Centre for Ecology & Hydrology","organisationIdentifier":"https://ror.org/00pggkr55","role":"rightsHolder","email":"enquiries@ceh.ac.uk"}],"spatialReferenceSystems":[{"code":"http://www.opengis.net/def/crs/EPSG/0/27700","title":"OSGB 1936 / British National Grid"}],"spatialRepresentationTypes":["vector"],"spatialResolutions":[{"equivalentScale":"10000"},{"distance":"100","uom":"m"}],"supplemental":[{"description":"Neal, C., Whitehead, P.G., Jeffery, H., Neal, M. 2005. 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