Table 749-2
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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


  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


  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


  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


  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


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.

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