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      <marc:subfield code="a">Guidelines for Canadian drinking water quality : </marc:subfield>
      <marc:subfield code="b">malathion : guideline technical document.</marc:subfield>
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      <marc:subfield code="a">Guidelines for Canadian drinking water quality : </marc:subfield>
      <marc:subfield code="b">guideline technical document : malathion</marc:subfield>
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      <marc:subfield code="a">Malathion</marc:subfield>
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      <marc:subfield code="a">Ottawa, ON : </marc:subfield>
      <marc:subfield code="b">Health Canada = Santé Canada, </marc:subfield>
      <marc:subfield code="c">2023.</marc:subfield>
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      <marc:subfield code="c">©2023</marc:subfield>
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      <marc:subfield code="a">Cover title.</marc:subfield>
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      <marc:subfield code="a">"Publication date: January 2023."</marc:subfield>
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      <marc:subfield code="a">Issued also in French under title: Recommandations pour la qualité de l'eau potable au Canada : malathion : document technique.</marc:subfield>
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      <marc:subfield code="a">Includes bibliographical references (pages 43-54).</marc:subfield>
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      <marc:subfield code="a">"Malathion is a registered insecticide and acaricide used on a wide variety of sites including agricultural and non-agricultural sites. In 2018 (the most recent year for which data are available), over 25 000 kg of malathion was sold in Canada. Malathion may be released into surface water or soil as runoff from the application site. Malathion is not usually found in drinking water sources in Canada. Low levels of malathion have been found in several Canadian provinces. The maximum reported concentrations are well below the MAC. Malathion is rarely detected in foods"--Executive summary.</marc:subfield>
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      <marc:subfield code="t">Recommandations pour la qualité de l'eau potable au Canada : </marc:subfield>
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      <marc:subfield code="u">https://publications.gc.ca/collections/collection_2023/sc-hc/H144-13-26-2022-eng.pdf</marc:subfield>
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