Incorporating multiple lines of evidence into sediment quality objectives
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INCORPORATING MULTIPLE LINES OF EVIDENCE INTO SEDIMENT QUALITY OBJECTIVES. Scientific Steering Committee Meeting July 26, 2005. TOPICS FOR TODAY. Issues raised at last SSC meeting Approach to validating the MLOE framework A new issue associated with missing data

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Incorporating multiple lines of evidence into sediment quality objectives

INCORPORATING MULTIPLE LINES OF EVIDENCE INTO SEDIMENT QUALITY OBJECTIVES

Scientific Steering

Committee Meeting

July 26, 2005


Topics for today
TOPICS FOR TODAY QUALITY OBJECTIVES

  • Issues raised at last SSC meeting

  • Approach to validating the MLOE framework

  • A new issue associated with missing data

  • Expansion of the MLOE framework to indirect effects


Basics of the mloe framework
BASICS OF THE MLOE FRAMEWORK QUALITY OBJECTIVES

  • Three lines of evidence

    • Represent a continuum from exposure to effect

  • Four categories for each LOE

  • MLOE merged into a station assessment

  • Integration accomplished through classifying all possible combinations

    • 4x4x4 tables

  • Reference

  • Marginal deviation from reference

  • Moderate effect

  • Severe effect

  • Unimpacted

  • Likely unimpacted

  • Inconclusive

  • Possibly impacted

  • Likely impacted

  • Clearly impacted


Chemistry moderate effect
CHEMISTRY: Moderate Effect QUALITY OBJECTIVES

Toxicity

Benthos


Issues raised at last ssc meeting
ISSUES RAISED AT LAST SSC MEETING QUALITY OBJECTIVES

  • Should LOE be weighted equally?

    • Chemistry is the stressor being regulated

    • Benthos are the endpoint of interest

    • Toxicity tests are the easiest to interpret

  • Ensure that there is a place for ancillary data in the assessment framework

  • Can you separate classification and uncertainty?


Station assessment categories
STATION ASSESSMENT CATEGORIES QUALITY OBJECTIVES

  • Unimpacted

  • Likely unimpacted

  • Inconclusive

  • Possibly impacted

  • Likely impacted

  • Clearly impacted


Separating classification and uncertainty
SEPARATING CLASSIFICATION QUALITY OBJECTIVESAND UNCERTAINTY

  • Three types of uncertainty

    • Data quality for a particular data set

    • Confidence in particular indicators / thresholds

    • Level of agreement among individual LOE

  • Our feeling: Best dealt with as a narrative aspect of the implementation guidance


Chemistry minor deviation
CHEMISTRY: Minor Deviation QUALITY OBJECTIVES

Toxicity

Benthos


Separating classification and uncertainty1
SEPARATING CLASSIFICATION QUALITY OBJECTIVESAND UNCERTAINTY

  • Three types of uncertainty

    • Data quality for a particular data set

    • Confidence in particular indicators / thresholds

    • Level of agreement among individual LOE

  • Our feeling: Best dealt with as a narrative aspect of the implementation guidance


Topics for today1
TOPICS FOR TODAY QUALITY OBJECTIVES

  • Issues raised at last SSC meeting

  • Approach to validating the MLOE framework

  • A new issue associated with missing data

  • Expansion of the MLOE framework to indirect effects


Validation
VALIDATION QUALITY OBJECTIVES

  • Repeatability

    • Are replicate samples at a site classified the same?

  • Consistency in distribution among individual LOE

  • SQO application in water bodies of “known” condition


Known condition
KNOWN CONDITION QUALITY OBJECTIVES

  • Use Bay Protection and Cleanup Program assessment to identify compromised water bodies

    • That program had targeted data collection to identify hot spots

  • Use chemistry and toxicity to identify cleanest waterbodies

    • Use data from sites where only part of the triad is available

    • Screen these waterbodies further based on land use

    • Confirm the list using Stakeholder Advisory Committee feedback


Topics for today2
TOPICS FOR TODAY QUALITY OBJECTIVES

  • Issues raised at last SSC meeting

  • Approach to validating the MLOE framework

  • A new issue associated with missing data

  • Expansion of the MLOE framework to indirect effects


New issue
NEW ISSUE QUALITY OBJECTIVES

  • How should the MLOE framework be applied in habitats where we have not yet developed interpretational tools?

    • Differs from situation where data were not previously collected, but could be collected

  • When tools are available for two LOE, apply the modified assessment framework that was developed for the unavailable data situation

  • When tools are for only available for one LOE, use that LOE in a screening mode

    • Apply BPJ to other LOE when screening indicates the necessity

    • BPJ may require additional data collection to establish site-specific reference condition


Topics for today3
TOPICS FOR TODAY QUALITY OBJECTIVES

  • Issues raised at last SSC meeting

  • Approach to validating the MLOE framework

  • A new issue associated with missing data

  • Expansion of the MLOE framework to indirect effects