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

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Part B, Section 7 a soil quality guideline based on a single class of organisms (e.g., when scientific evidence suggests that a single organism group is the most threatened). 7.4 Environmental Behaviour Considerations Studies which have examined the environmental fate and behaviour of contaminants in soil and terrestrial biota must be critically reviewed. Fate processes such as biodegradation, photolysis, hydrolysis, volatilization, adsorption, mobilization, and leaching should be examined. Physiological processes in biota including uptake, accumulation, metabolism, and elimination should also be reported. It is not necessary to have all the environmental fate information listed above to derive a guideline. However, it is necessary to have descriptive information on the major environmental factors that influence the potential hazard of the contaminant and its fate in the environment. Although derivation of environmental soil quality guidelines relies on toxicological data only, environmental behaviour data is critically examined and evaluated for pertinent information. During the assessment of individual contaminants, this information may play a key role in determining, for example, the derivation approach applied, chemical form of importance, usefulness of available toxicological data, or relevance of the final guideline in light of environmental behaviour. 7.5 Derivation of Soil Quality Guidelines for Soil Contact 7.5.1 Overview The following sections describe the methods for deriving soil quality guidelines for soil contact (SQG SC ) by soil-dependent organisms. Based on the exposure scenarios previously discussed, guidelines derived using this procedure apply to all land use categories (i.e., agricultural, residential/parkland, commercial, and industrial). The methods are presented in order of preference. When minimum data are not available for a particular method, a measure of conservatism is added to each subsequent method to account for the inherent uncertainties of deriving guidelines from a less preferable data set. In all, five methods are available for deriving SQG SC . An overview of the soil contact derivation procedure for agricultural and residential/parkland land uses is provided in Figure 10. An overview of the derivation procedure for commercial and industrial land use is provided in Figure 12. 7.5.2 Methods for Agricultural and Residential/Parkland Land Use There are three methods to derive guidelines for agricultural and residential/parkland land use. In the first method, guidelines are derived using a weight-of-evidence approach to estimate the threshold effects concentration (TEC). Alternatively, if minimum data requirements cannot be met in order to use this method (as specified below), the second method is used. In the second method, the TEC is estimated by extrapolating from the lowest observable "adverse" effect concentration (LO(A)EC). If the minimum data requirements cannot be met using this method, then the third method is used. In this method, the TEC is determined by extrapolating from the median effective concentration (EC 50 ) or median lethal concentration (LC 50 ). If minimum data requirement cannot be met using this method, no environmental guideline can be set for soil contact, but data gaps and research needs will be identified. 48
Part B, Section 7 The relation between TEC derived for each method and the distribution of "effects" and "no effects" data for cadmium is shown in Figure 11. 49
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A Protocol for the Derivation of En
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Readers' Comments The Canadian Coun
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Overview In response to growing pub
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mechanisms for migration of soil co
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procédures d'élaboration des reco
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• être absorbés par les plantes
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PART B Section 1 Derivation of Envi
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Section 2 Investigation of Contamin
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PART D Section 1 Derivation of the
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List of Figures 1 National Framewor
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Acknowledgements The CCME Subcommit
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Document Organization This document
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Bioaccumulation: The process by whi
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Denitrification: The gaseous loss o
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GGG Guidelines: Generic numerical l
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Mutagenicity: The ability of a chem
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xxxiv human exposure. Risk estimati
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Soil: Normally defined as the uncon
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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
Page 50 and 51: Part A, Section 2 Section 2 Nationa
Page 53 and 54: Part A, Section 2 2.2 Limitations o
Page 55 and 56: Part A, Section 2 17
Page 57 and 58: Part A, Section 2 Industrial: where
Page 59 and 60: • the sensitivity of the test con
Page 61: Part A, Section 3 23
Page 64 and 65: Section 2 Level of Ecological Prote
Page 66 and 67: Part B, Section 2 2.3 Endpoint Defi
Page 68 and 69: Part B, Section 2 There is consiste
Page 70 and 71: Part B, Section 4 Section 4 Potenti
Page 72: Part B, Section 4 Figure 4 Simplifi
Page 75 and 76: Figure 5 Key Receptors and Exposure
Page 77 and 78: Part B, Section 5 grazing herbivore
Page 80 and 81: Part B, Section 5 5.2.2 Maintenance
Page 82 and 83: Part B, Section 5 5.4 Industrial La
Page 84 and 85: Section 6 Uncertainty in Guidelines
Page 86 and 87: Section 7 Guidelines Derivation Pro
Page 88 and 89: Part B, Section 7 (SQG SG = soil qu
Page 92 and 93: Where: NPER = no to Potential Effec
Page 94 and 95: Part B, Section 7 7.5.2.1 Using Mic
Page 96 and 97: Part B, Section 7 data, the Median
Page 98 and 99: Part B, Section 7 EC 50 LC 50 UF =
Page 100 and 101: Where: ERL = Effects Range Low, ECL
Page 102: Part B, Section 7 Where: EC 50 = Me
Page 105 and 106: Part B, Section 7 Where the ECL lie
Page 107 and 108: Part B, Section 7 4. Fewer than thr
Page 110 and 111: Part B, Section 7 An uncertainty fa
Page 112 and 113: Part B, Section 7 Therefore, BCF =
Page 114 and 115: Part B, Section 7 ingestion (SQG I
Page 117 and 118: Section 8 Derivation of the Final E
Page 119 and 120: Part C, Section 1 65
Page 121 and 122: Part C, Section 1 various sites acr
Page 123 and 124: Part C, Section 1 Geographical unce
Page 125 and 126: preferred for the assessment, but s
Page 129 and 130: Part C, Section 2 Environmental con
Page 131 and 132: Part C, Section 2 extent, the steep
Page 133 and 134: Section 3 Exposure to Contaminants
Page 137 and 138: Part C, Section 4 Section 4 Exposur
Page 139 and 140: 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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