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Mussel Watch is the longest continuous, nationwide contaminant monitoring program, running from 1986 to present, analyzing sediment and bivalve tissue for organic contaminants and trace metals.

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            <gmx:Anchor xlink:href="https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/seaname/details/91" xlink:actuate="onRequest">North Atlantic Ocean</gmx:Anchor>
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            <gmx:Anchor xlink:href="https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/seaname/details/198" xlink:actuate="onRequest">Thunder Bay National Marine Sanctuary</gmx:Anchor>
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- Lauenstein, G. G. and A. Y. Cantillo (Editors)1993. Sampling and Analytical Methods of the National Status and Trends Program, National Benthic Surveillance, and Mussel Watch Projects; 1984-1992; Volume I; Overview and Summary of Methods. Silver Spring, MD. NOAA Technical Memorandum NOS ORCA 71. 157 pp.
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- Kimbrough, K. L., G. G. Lauenstein and W. E. Johnson (Editors). 2006. Organic Contaminant Analytical Methods of the National Status and Trends Program: Update 2000-2006. Silver Spring, MD. NOAA Technical Memorandum NOS NCCOS 30. 137 pp.
- McDonald, S. J., D. S. Frank, J. A. Ramirez, B. Wang, and J. M. Brooks. 2006. Ancillary Methods of the National Status and Trends Program: 2000-2006 Update. Silver Spring, MD. NOAA Technical Memorandums NOS NCCOS 28. 17 pp.

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        <gco:CharacterString>Metadata are developed, maintained and distributed by NCEI. Updates are performed as needed to maintain currentness.</gco:CharacterString>
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      <gmd:contact>
        <gmd:CI_ResponsibleParty>
          <gmd:organisationName>
            <gco:CharacterString>NOAA National Centers for Environmental Information</gco:CharacterString>
          </gmd:organisationName>
          <gmd:role>
            <gmd:CI_RoleCode codeList="https://data.noaa.gov/resources/iso19139/schema/resources/Codelist/gmxCodelists.xml#CI_RoleCode" codeListValue="custodian">custodian</gmd:CI_RoleCode>
          </gmd:role>
        </gmd:CI_ResponsibleParty>
      </gmd:contact>
    </gmd:MD_MaintenanceInformation>
  </gmd:metadataMaintenance>
  <gmi:acquisitionInformation>
    <gmi:MI_AcquisitionInformation id="AMS">
      <gmi:instrument>
        <gmi:MI_Instrument id="inst_bee1">
          <gmi:identifier>
            <gmd:MD_Identifier>
              <gmd:code>
                <gco:CharacterString>chromatograph</gco:CharacterString>
              </gmd:code>
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          </gmi:identifier>
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            <gco:CharacterString>Gas, ion, liquid or other chromatograph</gco:CharacterString>
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      <gmi:instrument>
        <gmi:MI_Instrument id="inst_befe">
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          </gmi:identifier>
          <gmi:type>
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          <gmi:description>
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      </gmi:instrument>
      <gmi:instrument>
        <gmi:MI_Instrument id="inst_be4d">
          <gmi:identifier>
            <gmd:MD_Identifier>
              <gmd:code>
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            </gmd:MD_Identifier>
          </gmi:identifier>
          <gmi:type>
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          <gmi:description>
            <gco:CharacterString>Instrument that measure the massess and relative concentrations of atoms and molecules</gco:CharacterString>
          </gmi:description>
        </gmi:MI_Instrument>
      </gmi:instrument>
    </gmi:MI_AcquisitionInformation>
  </gmi:acquisitionInformation>
</gmi:MI_Metadata>