Annette Islands Reserve

Metlakatla Indian Community


Soil and Ground Water Cleanup Levels
for Petroleum Contaminated Sites


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Metlakatla Indian Community Soil and Water Cleanup Levels
 

Concentration

Indicator Constituent

Residential a
Soil
(mg/kg)

Industrial b
Soil
(mg/kg)

Surface and Ground Water c
(mg/L)

Asbestos

< 1 percent

< 1 percent

7 million fibers/L

Acenaphthene

190

2,000

1.2

Acetone

9

8,000

NS

Aldrin

0.03

0.18

.00000013

Barium

982

5,800

1

Benzene

0.1

1.4

0.0012

Benzo(a)pyrene

0.1

0.1

0.0000044

Benzo(b)fluoranthene

0.1

1

0.0000044

Benzo(k)fluoranthene

0.1

1

0.0000044

Bis(2-ethylhexyl)phthalate

32

210

0.0018

2-butanone

48,000

48,000

NS

Cadmium

4.5

83

0.0022

Chromium (total)

100

450

0.1 d

4,4’-DDT

1.7

13

0.00000059

1,2-dichlorobenzene

6

7,500

2.7

1,4-dichlorobenzene

0.7

280

0.4

Di-n-butylphthalate

8,000

8,000

2.7

Ethylbenzene

20

230

0.7 d

Fluoranthene

1,900

8,000

0.3

Hexachlorobenzene

0.28

1.9

0.00000075

Lead

200

1000

0.0025

Mercury

22

560

0.00005

Methylene chloride

8.5

20

0.0047

MTBE

NS

NS

NS

Naphthalene

30

30

NS

PCBs (total)

0.08

1.3

0.00000017

n-propylbenzene

130

550

NS

Pyrene

1,400

2,500

0.96

Silver

40

9,400

0.0034

Toluene

40

520

1 d

TPH-Gasoline Range

100

100

1 e

TPH-Diesel Range

200

500

1 e

TPH-Residual Range

200

500

1 e

1,2,4-trichlorobenzene

480

1,700

0.07 d

1,2,4-trimethylbenzene

51

170

NS

1,3,5-trimethylbenzene

21

70

NS

Xylene

20

320

10 d

Notes for the table titled "Metlakatla Indian Community Soil and Water Cleanup Levels":

  • NS = No Standard
  • a = Residential cleanup level applies to all areas not zoned or otherwise officially designated for industrial use.
  • b = Industrial cleanup level applies to all areas zoned or otherwise officially designated for industrial use.
  • c = Ground water cleanup levels are based on national recommended water quality criteria for surface waters, except as otherwise noted. Cleanup levels reflect the most stringent applicable criteria.
  • d = Cleanup level based on Safe Drinking Water Act Maximum Contaminant Level (MCL) because there is currently no surface water criterion.
  • e = TPH cleanup levels based on Washington State ground water cleanup levels because there are no federal water quality criteria for these constituents.
Indicator Constituent Concentration
Residential1
(mg/kg)
Industrial2
(mg/kg)
Ground Water3,4
(mg/kg)
Volatile Organic Compounds
(typically found in gasoline)
Benzene* 0.1 1.4 0.0012
Ethylbenzene 20.0 230 3.1
Toluene 40.0 880 6.8
Xylene 20.0 320 105
Semi-Volatile and
Non-Volatile Organic Compounds
(typically found in diesel)
Benzo(a)pyrene* 0.1 0.1 0.0000044
Acenaphthene 190 2,000 1.2
Fluoranthene 1,900 8,000 0.3
Naphthalene 30 30 0.025
Additives MTBE (EPA Health
Advisory by 10/96)
NS NS 0.045
Gasoline AK101 100 100 16
Diesel AK102 200 500 16
Waste and Lubricating Oils AK103 200 500 16
Lead . 250 1,000 0.00327

Notes:

* = carcinogen

1 = Residential cleanup level applies to all areas not zoned or otherwise officially designated for industrial use.

2 = Industrial cleanup level applies to all areas zoned or otherwise designated for industrial use.

3 = Ground water cleanup levels are based on federal toxics criteria for surface waters, except as otherwise noted.

4 = If ground water is a current or potential future drinking water source, or may impact surface water which is a current or potential future drinking water source, cleanup will be required to meet federal drinking water standards.

5 = Cleanup level based on Safe Drinking Water Act Maximum Contaminant Level (MCL) because there is currently no surface water criterion.

6 = TPH cleanup levels based on Washington State ground water cleanup levels because there are not federal water quality criteria for these constituents.

7 = Cleanup level based on federal chronic toxicity criteria for aquatic organisms, expressed as a function of water hardness, according to the following equation: e(1.273[ln(hardness)]-4.705). Value in table corresponds to a total hardness of 100 mg/L.