Protocol for the Derivation of Environmental and Human ... - CCME

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Notice This document provides the rationale and guidance for developing environmental and human health soil quality guidelines for contaminated sites in Canada. It is issued in support of the National Contaminated Sites Remediation Program. This document is intended for general guidance only, and does not establish or affect legal rights or obligations. It does not establish a binding norm, or prohibit alternatives not included in the document and is not finally determinative of the issues addressed. Decisions in any particular case will be made by applying the law and regulations on the basis of specific facts when regulations are promulgated or permits are issued. iv
Overview In response to growing public concern over the potential ecological and human-health effects associated with exposure to contaminated sites, the Canadian Council of Ministers of the Environment (CCME) initiated in 1989 a five-year program entitled the National Contaminated Sites Remediation Program (NCSRP). To promote consistency and provide guidance in assessing and remediating contaminated sites under this program, the CCME released an interim set of numerical environmental quality guidelines in September 1991. The Interim Canadian Environmental Quality Criteria for Contaminated Sites (CCME, 1991a) were established for defined land uses by adopting existing criteria for soil and water used by various jurisdictions in Canada. However, many of the interim criteria for soil are not scientifically defensible. This protocol for guidelines derivation was developed to ensure that revised guidelines are scientifically defensible. The protocol considers the effects of contaminated soil exposure on human and ecological receptors for given land uses. The pathways and receptors of contaminated soil considered in the derivation of soil quality guidelines were selected based on exposure scenarios for agricultural, residential/parkland, commercial, and industrial land uses. Procedures for deriving environmental soil quality guidelines were developed to maintain important ecological functions that support activities associated with the identified land uses. Guidelines are derived using toxicological data to determine the threshold level on key receptors. Exposure from direct soil contact is the primary derivation procedure for environmental guidelines for residential/parkland and commercial/industrial land uses. Another procedure, exposure from contaminated soil and food ingestion, may be considered for certain land uses if there is adequate data. For agricultural land use, if both derivation procedures are used, the lowest-value result is considered the environmental soil quality guideline. Deriving human health based soil quality guidelines includes: • assessing the hazard posed by a chemical; v
Page 1 and 2: A Protocol for the Derivation of En
Page 3: Readers' Comments The Canadian Coun
Page 7 and 8: mechanisms for migration of soil co
Page 9 and 10: procédures d'élaboration des reco
Page 11 and 12: • être absorbés par les plantes
Page 13 and 14: PART B Section 1 Derivation of Envi
Page 16 and 17: Section 2 Investigation of Contamin
Page 18 and 19: PART D Section 1 Derivation of the
Page 20 and 21: List of Figures 1 National Framewor
Page 22 and 23: Acknowledgements The CCME Subcommit
Page 24 and 25: Document Organization This document
Page 26 and 27: Bioaccumulation: The process by whi
Page 28 and 29: Denitrification: The gaseous loss o
Page 30 and 31: GGG Guidelines: Generic numerical l
Page 32 and 33: Mutagenicity: The ability of a chem
Page 34 and 35: xxxiv human exposure. Risk estimati
Page 36 and 37: Soil: Normally defined as the uncon
Page 38 and 39: VVV Volatilization: The chemical pr
Page 41 and 42: Section 1 The National Contaminated
Page 44 and 45: Part A, Section 1 6
Page 46 and 47: Part A, Section 1 1.2.2.2 Remediati
Page 48 and 49: Part A, Section 1 of, and establish
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Part A, Section 2 17
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Part A, Section 2 Industrial: where
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• the sensitivity of the test con
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Part A, Section 3 23
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Section 2 Level of Ecological Prote
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Part B, Section 2 2.3 Endpoint Defi
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Part B, Section 2 There is consiste
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Part B, Section 4 Section 4 Potenti
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Part B, Section 4 Figure 4 Simplifi
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Figure 5 Key Receptors and Exposure
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Part B, Section 5 grazing herbivore
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Part B, Section 5 5.2.2 Maintenance
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Part B, Section 5 5.4 Industrial La
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Section 6 Uncertainty in Guidelines
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Section 7 Guidelines Derivation Pro
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Part B, Section 7 (SQG SG = soil qu
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Part B, Section 7 a soil quality gu
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Where: NPER = no to Potential Effec
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Part B, Section 7 7.5.2.1 Using Mic
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Part B, Section 7 data, the Median
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Part B, Section 7 EC 50 LC 50 UF =
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Where: ERL = Effects Range Low, ECL
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Part B, Section 7 Where: EC 50 = Me
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Part B, Section 7 Where the ECL lie
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Part B, Section 7 4. Fewer than thr
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Part B, Section 7 An uncertainty fa
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Part B, Section 7 Therefore, BCF =
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Part B, Section 7 ingestion (SQG I
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Section 8 Derivation of the Final E
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Part C, Section 1 65
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Part C, Section 1 various sites acr
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Part C, Section 1 Geographical unce
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preferred for the assessment, but s
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Part C, Section 2 Environmental con
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Part C, Section 2 extent, the steep
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Section 3 Exposure to Contaminants
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Part C, Section 4 Section 4 Exposur
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Part C, Section 4 within limits, th
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Part C, Section 4 Figure 19 Concept
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Part C, Section 4 4.2 Absorption of
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Part C, Section 4 In the case of no
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Residential/Parkland Land Use Sensi
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Part C, Section 4 Commercial Land U
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Part C, Section 4 Industrial Land U
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Part C, Section 5 these data are av
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Part C, Section 5 GEOCHEM (Mattigod
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Part C, Section 5 • K oc (sorptio
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Part C, Section 5 5.3.3 Evaluation
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Part C, Section 5 parameters, and s
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Section 6 Derivation of the Final H
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Part D, Section 1 101
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does not apply to the commercial or
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Part D, Section 1 105
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References Aldenberg, T., and W. Sl
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References -dwelling Organisms", Ab
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References 112
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References Hill, E.F., and D.J. Hof
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References Paustenbach, D.J., (1989
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References Summers, J.K., H.T. Wils
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Appendix A Appendix A Nutrient and
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Appendix A Figure A.1 Simplified Te
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Appendix A 4.1 Agricultural and Res
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Appendix A References Bååth, E.,
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The Subcommittee considers that exp
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Appendix B P l P r BW = percent pro
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Appendix B Substituting equation 5
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Appendix B Where no MRL exists, the
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Appendix B Then, the remainder (T R
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Appendix B For carcinogens, total i
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Appendix C Rearranging [2] and subs
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Appendix C References Chiou, C.T.,
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Appendix D uncontaminated organic m
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Appendix D R = recharge, m/yr A = a
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Appendix D 2.3.3 Hydraulic Gradient
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Appendix D 2.3.5 Site Length The le
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Appendix D Table D.2 Lower Quantile
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Figure D.2 Conceptual Model of Dilu
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Appendix D Figure D.3 Recharge Esti
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Appendix D 159
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Smith, A.E., P.B. Ryan, and J.S. Ev
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Appendix E C K L V is the climate f
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Appendix E contaminant concentratio
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Appendix F Appendix F Multi-media E
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Appendix F example, fish BCFs are t
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Appendix G 2.2 Contaminant Vapour T
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Appendix G Table G.1 Equations Used
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Appendix G at the outset that, rath
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Appendix G 4.4 Application of the R
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Average outdoor summer temperature
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Appendix G References Alberta Envir
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