Priority contaminants of ecological concern for sites that qualify for the simplified terrestrial ecological evaluationa
|
Soil Concentration (mg/kg) |
||
| Priority Contaminant | Unrestricted Land Useb | Industrial or Commercial Site |
|
METALSc |
||
| Antimony | See Note d | See Note d |
| Arsenic III | 20 mg/kg | 20 mg/kg |
| Arsenic IV | 95 mg/kg | 260 mg/kg |
| Barium | 1,250 mg/kg | 1,320mg/kg |
| Beryllium | 25 mg/kg | See Note d |
| Cadmium | 25 mg/kg | 36 mg/kg |
| Chromium (total) | 42 mg/kg | 135 mg/kg |
| Cobalt | See Note d | See Note d |
| Copper | 100 mg/kg | 550 mg/kg |
| Lead | 220 mg/kg | 220 mg/kg |
| Magnesium | See Note d | See Note d |
| Manganese | See Note d | 23,500 mg/kg |
| Mercury, inorganic | 9 mg/kg | 9 mg/kg |
| Mercury, organic | 0.7 mg/kg | 0.7 mg/kg |
| Molybdenum | See Note d | 71 mg/kg |
| Nickel | 100 mg/kg | 1,850 mg/kg |
| Selenium | 0.8 mg/kg | 0.8 mg/kg |
| Silver | See Note d | See Note d |
| Tin | 275 mg/kg | See Note d |
| Vanadium | 26 mg/kg | See Note d |
| Zinc | 270 mg/kg | 570 mg/kg |
|
PESTICIDES |
||
| Aldicarb/aldicarb sulfone (total) | See Note d | See Note d |
| Aldrin | 0.17 mg/kg | 0.17 mg/kg |
| Benzene hexachloride (including lindane) | 10 mg/kg | 10 mg/kg |
| Carbofuran | See Note d | See Note d |
| Chlordane | 1 mg/kg | 7 mg/kg |
| Chlorpyrifos/chlorpyrifos-methal (total) | See Note d | See Note d |
| DDT/DDD/DDE | 1 mg/kg | 1 mg/kg |
| Dieldrin | 0.17 mg/kg | 0.17 mg/kg |
| Endosulfan | See Note d | See Note d |
| Endrin | 0.4 mg/kg | 0.4 mg/kg |
| Heptachlor/heptachlor epoxide (total) | 0.6 mg/kg | 0.6 mg/kg |
| Hexachlorobenzene | 31 mg/kg | 31 mg/kg |
| Parathion/methyl parathion (total) | See Note d | See Note d |
| Pentachlorophenol | 11 mg/kg | 11 mg/kg |
| Toxaphene | See Note d | See Note d |
|
OTHER CHLORINATED ORGANICS |
||
| Chlorinated dibenzofurans (total) | 3E-06 mg/kg | 3E-06 mg/kg |
| Dioxins | 5E-06 mg/kg | 5E-06 mg/kg |
| Hexchlorophene | See Note d | See Note d |
| PCB mixtures (total) | 2 mg/kg | 2 mg/kg |
| Pentachlorobenzene | 168 mg/kg | See Note d |
|
OTHER NONCHLORINATED ORGANICS |
||
| Acenaphthene | See Note d | See Note d |
| Benzo(a)pyrene | 30 mg/kg | 300 mg/kg |
| Bis (2-ethylhexyl) phthalate | See Note d | See Note d |
| Di-n-butyl phthalate | 200 mg/kg | See Note d |
|
PETROLEUM |
||
| Gasoline Range Organics | 200 mg/kg | 12,000 mg/kg
except that the concentration shall not exceed residual saturation at the soil surface. |
| Diesel Range Organics
Common examples of diesel range organics include: Diesel #2, Fuel Oil #2, and light oil including some bunker oils. Refer to Table 830-1 |
460 mg/kg | 15,000 mg/kg
except that the concentration shall not exceed residual saturation at the soil surface. |
Table 749-2 Notes
a Caution on misusing these chemical concentration numbers. These values have been developed for use at sites where a site-specific terrestrial ecological evaluation is not required. They are not intended to be protective of terrestrial ecological receptors at every site. Exceedances of the values in this table do not necessarily trigger requirements for cleanup action under this chapter. The table is not intended for purposes such as evaluating sludges or wastes.
This list does not imply that sampling must be conducted for each of these chemicals at every site. Sampling should be conducted for those chemicals that might be present based on available information, such as current and past uses of chemicals at the site.
b Applies to any site that does not meet the definition of industrial or commercial.
c For arsenic, use the valence state most likely to be appropriate for site conditions, unless laboratory information is available. Where soil conditions alternate between saturated, anaerobic and unsaturated, aerobic states, resulting in the alternating presence of arsenic III and arsenic V, the arsenic III concentrations shall apply.
d Safe concentration has not yet
been established.
[Area Calculation Aid] [Aerial Photo with Area Designations] [TEE Table 749-1] [TEE Table 749-2] [TEE Table 749-3] [TEE Table 749-4] [TEE Table 749-5] [TEE Table 830-1]
[Exclusions Main] [TEE Definitions] [Simplified or Site-Specific?] [Simplified Ecological Evaluation] [Site-Specific Ecological Evaluation] [WAC 173-340-7493]