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	<xs:import namespace="http://dd.eionet.europa.eu/namespace.jsp?ns_id=134" schemaLocation="http://dd.eionet.europa.eu/GetContainerSchema?id=TBL4590"/>
	<xs:element name="ImpactQuality">
		<xs:annotation>
			<xs:documentation xml:lang="en">
				<dd2:Keyword><![CDATA[Inland water]]></dd2:Keyword>
				<dd2:Keyword><![CDATA[Pollution]]></dd2:Keyword>
				<dd2:Keyword><![CDATA[River]]></dd2:Keyword>
				<dd2:Keyword><![CDATA[Surface water]]></dd2:Keyword>
				<dd2:Keyword><![CDATA[Water]]></dd2:Keyword>
				<dd2:Keyword><![CDATA[Water quality]]></dd2:Keyword>
				<dd3:EEAissue><![CDATA[Eutrophication]]></dd3:EEAissue>
				<dd3:EEAissue><![CDATA[Water]]></dd3:EEAissue>
				<dd2:Name><![CDATA[Hazardous Substances in Rivers]]></dd2:Name>
				<dd2:Definition><![CDATA[Chemical quality data on the concentrations of hazardous substances in rivers are requested from EEA Member Countries on an annual basis.]]></dd2:Definition>
				<dd3:Methodology><![CDATA[Comparable and harmonised data are requested on the concentrations and distribution of hazardous substances measured at all national river monitoring stations. The focus is on those hazardous substances included as Water Framework Directive Priority Substances, those noted in Lists I and II of the Dangerous Substances Directive, as well as HELCOM and OSPAR Priority Substances, and any other nationally monitored hazardous substances. The determinands are detailed in the codelist attached to the Determinand_HazSubs field. This list is not exhaustive. Countries are asked to provide the name and CAS Number of any additional determinands included in their data submissions. Countries are also asked to provide a description of the analytical method, preferable as a CEN/ISO code (if available).

The preferred option for data on hazardous substances is disaggregated, individual sample data for each monitoring site. Sample concentration values recorded as below the limit of detection or determination should be replaced with a value equivalent to half the limit of detection or determination, with the value of the limit of detection or determination noted in the appropriate fields. Negative values should not be used to represent values below the limit of detection or determination.

In cases where a determinand concentration at a monitoring site for each sampling occasion is represented by the averaged concentration from a number of sub-sites, then additional information relevant for the spatial data aggregation should be reported in appropriate fields: The method of aggregation (such as average), number of sub-sites, number of samples and standard deviation (see each field for more detailed methodology). On aggregation, sample concentration values recorded as below the limit of detection or determination should be replaced with a value equivalent to half the limit of detection or determination, with the value of the limit of detection or determination noted in the appropriate fields. In cases where data on hazardous substances are reported in spatially aggregated format, the data on supporting elements (such as pH, temperature, hardness, Ca, Mg, Na etc.) must also be aggregated in the same way.

The following fields combine to create a unique record in this table: CountryCode, NationalStationID, Year, Month, Day and Determinand_HazSubs. No duplicate records should exist within this combination.

We would like to encourage all countries to provide data on hazardous substances in rivers, for as many stations, for as many determinands, and for as long a time series as possible.]]></dd3:Methodology>
			</xs:documentation>
		</xs:annotation>
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				<xs:element name="Row" minOccurs="1" maxOccurs="unbounded">
					<xs:complexType>
						<xs:sequence>
							<xs:element ref="dd134:CountryCode" minOccurs="0" maxOccurs="1"/>
							<xs:element ref="dd134:NationalStationID" minOccurs="0" maxOccurs="1"/>
							<xs:element ref="dd134:Year" minOccurs="0" maxOccurs="1"/>
							<xs:element ref="dd134:Month" minOccurs="0" maxOccurs="1"/>
							<xs:element ref="dd134:Day" minOccurs="0" maxOccurs="1"/>
							<xs:element ref="dd134:Determinand_HazSubs" minOccurs="0" maxOccurs="1"/>
							<xs:element ref="dd134:Unit_HazSubs" minOccurs="0" maxOccurs="1"/>
							<xs:element ref="dd134:CASNumber" minOccurs="0" maxOccurs="1"/>
							<xs:element ref="dd134:CEN_ISO" minOccurs="0" maxOccurs="1"/>
							<xs:element ref="dd134:SampleDepth" minOccurs="0" maxOccurs="1"/>
							<xs:element ref="dd134:NoOfSubsites" minOccurs="0" maxOccurs="1"/>
							<xs:element ref="dd134:NumberOfSamples" minOccurs="0" maxOccurs="1"/>
							<xs:element ref="dd134:MethodOfAggregation" minOccurs="0" maxOccurs="1"/>
							<xs:element ref="dd134:LimitFlag" minOccurs="0" maxOccurs="1"/>
							<xs:element ref="dd134:LimitOfDetection" minOccurs="0" maxOccurs="1"/>
							<xs:element ref="dd134:LimitOfDetermination" minOccurs="0" maxOccurs="1"/>
							<xs:element ref="dd134:Concentration" minOccurs="0" maxOccurs="1"/>
							<xs:element ref="dd134:StandardDeviation" minOccurs="0" maxOccurs="1"/>
							<xs:element ref="dd134:Hardness" minOccurs="0" maxOccurs="1"/>
							<xs:element ref="dd134:SuspendedParticulateMatter" minOccurs="0" maxOccurs="1"/>
							<xs:element ref="dd134:DissolvedOrganicMatter" minOccurs="0" maxOccurs="1"/>
							<xs:element ref="dd134:pH" minOccurs="0" maxOccurs="1"/>
							<xs:element ref="dd134:Temperature" minOccurs="0" maxOccurs="1"/>
							<xs:element ref="dd134:Ca" minOccurs="0" maxOccurs="1"/>
							<xs:element ref="dd134:Na" minOccurs="0" maxOccurs="1"/>
							<xs:element ref="dd134:K" minOccurs="0" maxOccurs="1"/>
							<xs:element ref="dd134:HCO3" minOccurs="0" maxOccurs="1"/>
							<xs:element ref="dd134:Cl" minOccurs="0" maxOccurs="1"/>
							<xs:element ref="dd134:SO4" minOccurs="0" maxOccurs="1"/>
							<xs:element ref="dd134:Remarks" minOccurs="0" maxOccurs="1"/>
						</xs:sequence>
						<xs:attribute name="status" type="xs:string" use="optional"/>
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