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Risk-Based Waste Classification in California (1999) / Chapter Skim
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Appendix B: DTSC Issues
Pages 130-135

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From page 130...
... (The Reference Tab and page numbers refer to the DTSC report, 199Sa.) Chapter Reference Specific DTSC Issues TTLC ISSUES 1 Model Selection: Is it appropriate to use a multimedia, multipathway risk assessment model to establish concentration limits on organic chemical constituents in various classes of waste?
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From page 131...
... For non-carcinogens? 6 Pathways and Parameters: Chapter 3 Do the exposure pathways evaluated for Scenarios: workers and residents reasonably represent Connection to Policy the exposure potential for these groups of people?
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From page 132...
... The degree of overestimation of exposure from a landfill source would likely be much less for vapors, because advective Beyond the scope of the committee's task; however, see Chapter 4 - Parameter Selection within Specific Models for discussion of landfill worker scenario and model parameters 8 9 Chapter 3 Scenarios: Completeness and Coverage transport is likely to result in vapor emissions, usually through a gas collection system, regardless of daily cover or permanent cap. However, only a fraction of the landfill would be producing gases at any given time.
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From page 133...
... Chapter 3 Ecological Scenario 13 Chapter 4 Analytical Methods 14 Chapter 4 Analytical Methods SERT ISSUES: 15 SERTs are based on the lowest of (1) healthbased concentrations calculated by DTSC, (2)
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From page 134...
... Reference Tab 3 Appe7Ldi~c 2 (pa 43) Chapter Reference Regulatory Thresholds 1 18 Chapter 2 Implementation Practicality and Evaluation Chapter 4 Analytical Issues Chapter 4 Analytical Issues 21 Chapter 3 Scenarios: Connection to Policy 22 Chapter 4 - Soluble or Extractable Regulatory Thresholds
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From page 135...
... Reference Tab 3 ApperLdi~c 4 (pa 729 Chapter Reference Chapter 4 Analytical Issues Chapter 4 Analytical Issues Chapter 4 - Toxicity Tests
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Key Terms

  • preliminary endangerment
  • establish concentration
  • endangerment assessment
  • concentration limits
  • various classes

  • waste leachates
  • laboratory extraction
  • calculated concentration
  • estimated quantitation
  • chemical constituents

  • solid wastes
  • eql reasonable
  • municipal solid
  • quantitation level
  • extractable regulatory

  • regulatory thresholds
  • spreadsheet assesses
  • landfill source
  • factor calculated
  • human exposure

  • assessment spreadsheet
  • specific dtsc
  • reference tabs
  • concentrations calculated
  • dtsc report

  • vapor emissions
  • assesses exposure
  • liquid wastes
  • acute oral
  • gas collection


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