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Mercury
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Explanation
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| Ambient Water
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• 0.144 u/l for ingestion of both water and aquatic organisms;>
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Established under Clean Water Act 304(a)
Ambient
water criteria varies by state (may change with
GLI)
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• 0.146 u/l
for ingestion of only aquatic organism.
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• 2.4 u/l
for freshwater acute exposure;
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• 0.012 u/l
for freshwater chronic exposure;
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• 2.1 u/l
for marine acute exposure;
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• 0.025 u/l
for marine chronic exposure.
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| Drinking Water
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• Maximum
contaminant level = 0.002 mg/l (40 CFR 141.62)
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• Maximum
contaminant level for mercury. Established
under the Safe Drinking Water Act.
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| Air
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• No ambient
standard.
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| Sludge |
Limits: |
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• 17 mg/kg (dry wt) and 17 kg/hectare cumulative loading for sludge applied on agricultural, forest and publicly accessible lands. |
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• 17 mg/kg(dry wt) and .85 kg/hectare annual loading rate for sludge sold or distributedfor application to a lawn or home garden.
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• 57 mg/kg
(dry wt) for sludge sold or distributed for other types of land disposal
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• 100 g/kg
(dry wt) for sludge disposed in lined or unlined facilities (40 CFR 503).
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| Compost |
• No federal standards. |
Minnesota sets mercury concentration limits in compost. |
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| Fish
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• 1 ug/g (1mg/kg or 1 ppm) |
FDA action level for methyl mercury 1 ug/g (1 mg/kg or 1 ppm) |
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| Groundwater |
• 2 ug/l |
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| Bottled Water
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• 0.002 mg/l (21 CFR 103.35) |
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| Water-level of detect |
• 0.2 ug/l(200 mg/l) = recommended method |
EPA-approved method to detect Hg in water. Lower detection methods are available, but not yet approved by EPA. |
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| Hazardous Waste |
• TCLP = 0.2mg/l or 0.2 ppm (40 CFR 261.24, 264) |
Land
disposal (Subtitle D, non-hazardous landfills)prohibited
unless leachate contains less than 0.2mg/l.
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