Regulation and Risk Assessment of 1,4-Dioxane - Environmental Investigation and Remediation - page 266

TABLE 6.1 (continued)
State, Federal (EPA), and International Regulatory Guidelines, Action Levels, and
Remediation Targets for 1,4-Dioxane as of 2007
Michigan: Cleanup criteria or screening levels [2]
Drinking water (industrial): 350 μg/L
Drinking water (residential): 85 μg/L
Soil (industrial drinking water protection): 7 mg/kg
Minnesota: Recommended allowable limits for drinking water contaminants [13,14]
Drinking water: 30 μg/L
Mississippi: Target remedial goal [3]
Groundwater: 6.09 μg/L
Soil (restricted): 520 mg/kg
Soil (unrestricted): 0.581 mg/kg
Missouri: Target concentrations [2]
Groundwater: 3 μg/L
Soil (direct exposure): 150-590 mg/kg
Soil (leaching to groundwater): 0.01 mg/kg
Montana: Screening level (EPA Region 9 PRGs)
Tap water: 6.1 μg/L
Soil (industrial): 160 mg/kg
Soil (residential): 44 mg/kg
New Hampshire: Proposed risk-based remediation value [10]
Groundwater: 3 μg/L
New Mexico: Informal health advisory level from USEPA [4]
Groundwater: 568 μg/L for 10 days' exposure
New York
Browni eld program soil cleanup objectives [5]
Soil (unrestricted): 7.3 mg/kg
Soil (residential): 9.8 mg/kg
Soil (restricted residential): 13 mg/kg
Soil (commercial): 130 mg/kg
Soil (industrial): 250 mg/kg
Department of Health drinking water standard (immediate action level) [15]
Drinking water: 600 μg/L
North Carolina: Groundwater quality standard [6]
Groundwater: 7 μg/L
Ohio: EPA Region 9 PRGs for soil and groundwater [7]
Oklahoma: (EPA Region 6 screening levels) [8]
Soil (residential): 44 mg/kg
Soil (industrial — indoor worker): 520 mg/kg
Soil (industrial — outdoor worker): 170 mg/kg
Tap water: 6.1 μg/L
Oregon [20]
Risk-based concentrations:
Soil (residential — soil ingestion, dermal contact): 53 mg/kg
Soil (urban residential — soil ingestion, dermal contact): 140 mg/kg
Soil (residential — leaching to groundwater): 0.23 mg/kg