hot rolled & cold rolled categorization hot rolled & cold rolled categorization
Categorization of Substances on the DSL: Operational Approach
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Transcript of Categorization of Substances on the DSL: Operational Approach
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Categorization of Substances on the DSL: Operational Approach
DOMESTIC SUBSTANCES LISTDOMESTIC SUBSTANCES LIST
Persistent OR Bioaccumulative According to the Regulations
Persistent OR Bioaccumulative According to the RegulationsGreatest Potential
for Human Exposure
Greatest Potentialfor Human Exposure
Persistent OR Bioaccumulative and“Inherently Toxic”
to Humans
Persistent OR Bioaccumulative and“Inherently Toxic”
to Humans
PersistentOR Bioaccumulative and
“Inherently Toxic” tonon-Human Organisms
PersistentOR Bioaccumulative and
“Inherently Toxic” tonon-Human Organisms
ENVIRONMENT CANADA
SCREENING LEVEL RISK ASSESSMENTSCREENING LEVEL RISK ASSESSMENT
HEALTH CANADA
HEALTH CANADA ENVIRONMENT CANADA
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PSLNo further action
under this programToxic
(Possible VE)
Outcome of Screening Level Risk Assessments
SCREENING LEVEL RISK ASSESSMENTS
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Definitions
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Guiding Principles of Water Quality Guidelines:
•Protect all life stages of all species
•All components of ecosystem should be considered
•Recommended guideline is a single maximum value not to be exceeded. This value is based on a long-term no-effect concentration.
•Unless otherwise specified, a guideline refers to the total concentration in an unfiltered sample
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Connolly, J.P. and Pedersen, C.J. 1988. A thermodynamic-based evaluation of
organic chemical accumulation in aquatic organisms. Environ. Sci. Technol.
22:99-103.
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Frequency of Adverse Effect Concentrations associated with Cadmium Contaminated Sediments
0
0.2
0.4
0.6
0.8
1
0.1 1 10 100 1000
Cadmium Concentration (mg/kg dry weight)
Fre
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of
Ad
ve
rse
B
iolo
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al E
ffe
ct
Ob
se
rva
tio
ns
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Frequency of no-effects observations in sediment associated cadmium concentrations
0
0.2
0.4
0.6
0.8
1
1.2
0.00001 0.0001 0.001 0.01 0.1
Cadmium Concentration (mg/kg dry weight)
Fre
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No
-Eff
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Threshold Effect Level:
TEL = (1 x 0.0015) = 0.387 mg/kg dry sediment
Threshold Effect Level:
TEL = (1 x 0.0015) = 0.387 mg/kg dry sediment
Threshold Effect Level:
TEL = (1 x 0.0015) = 0.387 mg/kgdry sediment
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Frequency of Adverse Effect Concentrations associated with Cadmium Contaminated Sediments
0
0.2
0.4
0.6
0.8
1
0.1 1 10 100 1000
Cadmium Concentration (mg/kg dry weight)
Fre
qu
en
cy
of
Ad
ve
rse
B
iolo
gic
al E
ffe
ct
Ob
se
rva
tio
ns
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Frequency of no-effects observations in sediment associated cadmium concentrations
0
0.2
0.4
0.6
0.8
1
1.2
0.00001 0.0001 0.001 0.01 0.1
Cadmium Concentration (mg/kg dry weight)
Fre
qu
en
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No
-Eff
ec
t O
bs
erv
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s
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Threshold Effect Level:
TEL = (1 x 0.0015) = 0.387 mg/kg dry sediment
Threshold Effect Level:
TEL = (1 x 0.0015) = 0.387 mg/kg dry sediment
Threshold Effect Level:
TEL = (1 x 0.0015) = 0.387 mg/kgdry sediment
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Probable Effect Level:
PEL = (20 x 0.02) = 0.632 mg/kgdry sediment
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Frequency of Adverse Effect Concentrations associated with Cadmium Contaminated Sediments
0
0.2
0.4
0.6
0.8
1
0.1 1 10 100 1000
Cadmium Concentration (mg/kg dry weight)
Fre
qu
en
cy
of
Ad
ve
rse
B
iolo
gic
al E
ffe
ct
Ob
se
rva
tio
ns
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Frequency of no-effects observations in sediment associated cadmium concentrations
0
0.2
0.4
0.6
0.8
1
1.2
0.00001 0.0001 0.001 0.01 0.1
Cadmium Concentration (mg/kg dry weight)
Fre
qu
en
cy
of
No
-Eff
ec
t O
bs
erv
ati
on
s
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Probable Effect Level:
PEL = (20 x 0.02) = 0.632 mg/kgdry sediment
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Threshold Effect Level:
TEL = (1 x 0.0015) = 0.387 mg/kg dry sediment
No Observed Effect Level (NOEL):
NOEL = 0.5 x TEL
= 0.5 x 0.387 = 0.194 mg/kgdry
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Guidelines for the Protection of Wildlife
TDI = (LOED x NOED)0.5 x Safety Factor
TDI = Tolerable Daily Intake (mg/kg.day)
LOED = Lowest Observed Effects Dose (mg/kg.day)
NOED = No Observed Effects Dose (mg/kg.day)
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TRG = TDI x BW x AF / Food Ingestion Rate
BW = Body Weight (kg)
Food Ingestion Rate (kg/day)
TRG = Tissue Residue Guideline (mg/kg.day)
AF = Appointment Factor
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Probable Effect Level:
PEL = (20 x 0.02) = 0.632 mg/kg dry sediment
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No Observed Effect Level (NOEL):
NOEL = 0.5 x TEL
= 0.5 x 0.387 = 0.194 mg/kg dry