North Carolina Cleanup Standards for Hydrocarbon Contaminated Soil

The North Carolina Department of Environment and Natural Resources has adopted Risk-Based Assessment and Corrective Action procedures to evaluate and remediate releases from petroleum underground storage tanks. Please visit our Web Site at: http://ust.ehnr.state.nc.us/main.html or call the Underground Storage Tank section at 919-733-8486 for the most recent information.

In accordance with 15A NCAC 2L .0115 (m), three categories of soil cleanup levels have been established: residential, industrial/commercial, and soil-to-groundwater maximum soil contaminant concentrations. The soil-to-groundwater maximum soil contaminant concentrations were established to protect groundwater from the leaching of contaminants from soil.

Cleanup Requirements

Pursuant to 15A NCAC 2L .0115(h), soil must be remediated to the maximum soil contaminant concentrations or as closely thereto as economically or technologically feasible.

High and Intermediate Risk Releases: For high and intermediate risk releases, soil contamination must be remediated to the lowest of:

a)       Residential or industrial/commercial maximum soil contaminant concentrations, whichever are applicable; or

b)       Soil-to-groundwater maximum soil contaminant concentrations.

Low Risk Releases: For low risk releases, soil contamination must be remediated to the residential or industrial/commercial maximum soil contaminant concentrations, whichever are applicable.

Contact: Linda L. Smith, North Carolina Division of Waste Management, 919-733-1317

E-mail: Linda.L.Smith@ncmail.net

Web Site: http://ust.enr.state.nc.us/main.html

Maximum Soil Contaminant Concentrations
 

Constituent

CAS#

Residential Soil Cleanup Levels (mg/kg)

Industrial/ Commercial Soil Cleanup Levels (mg/kg)

Soil-to-Water Maximum Contaminant Concentration (Soil mg/kg)

Acenaphthene

83-32-9

940

24000

8

Acenaphthylene

208-96-8

469

12264

11

Acetone

67-64-1

1564

40880

3

Aliphatics, C5-C8

N/A

939

24528

72

Aliphatics, C9-C18

N/A

9386

245280

3255

Aliphatics, C19-C36

N/A

93860

#

##

Anthracene

120-12-7

4600

122000

995

Aromatics, C9-C22

N/A

469

12264

34

Barium

7440-39-3

1095

28616

848

Benzene

71-43-2

22

200

0.0056

Benzo(a)anthracene

56-55-3

0.88

8

0.34

Benzo(b)fluoranthene

205-99-2

0.88

8

1

Benzo(g,h,i)perylene

191-24-2

469

12264

6720

Benzo(k)fluoranthene

207-08-9

9

78

12

Benzo(a)pyrene

50-32-8

0.088

0.78

0.091

Benzoic Acid

65-85-0

62571

1635200

112

Bis(2-chloroethyl)ether (BCEE)

111-44-4

0.58

5.2

0.0002

Bis(2-ethylhexyl)phthalate (DEHP)

117-81-7

46

410

6.67

Bromoform

75-25-2

81

724

0.0012

n-Butylbenzene

104-51-8

156

4088

4

sec-Butylbenzene

135-98-8

156

4088

3

tert-Butylbenzene

98-06-6

156

4088

3

Carbon disulfide

75-15-0

1564

40880

4

Chlorobenzene

108-90-7

312

8176

0.437

Chloroform (trichloromethane)

67-66-3

100

938

0.001

Chloromethane (methyl chloride)

74-87-3

49

440

0.02

Chromium (Total)

7440-50-8

47

1226

27

Chromium III

16065-83-1

23460

613200

27

Chromium VI

18540-29-9

47

1226

27

Chrysene

218-01-9

88

780

38

Dibenz(a,h)anthracene

53-70-8

0.088

0.78

0.17

Dibenzofuran

132-64-9

62

1635

4.7

Dibromochloromethane

124-48-1

7

68

0.002

1,2-Dibromoethane (ethylene dibromide)

106-93-4

0.0075

0.067

0.00000197

1,2-Dichlorobenzene

95-50-1

1400

36000

7

1,3-Dichlorobenzene

541-73-1

1400

36000

24

1,4-Dichlorobenzene

106-46-7

27

240

1

1,1-Dichloroethane

75-34-3

1560

40000

4

1,2-Dichloroethane (ethylene dichloride)

107-06-2

7

63

0.0018

1,2-Dichloroethene (cis)

156-59-2

156

4000

0.35

1,2-Dichloroethene (trans)

156-60-5

320

8200

0.38

1,1-Dichloroethylene

75-35-4

1

10

0.045

1,2-Dichloropropane

78-87-5

9

84

0.0029

1,3-Dichloropropene (cis and trans)

542-75-6

4

33

0.0009

2,4-Dimethylphenol

105-67-9

312

8176

0.9

Ethyl Acetate

141-78-6

14078

367920

11

Ethylbenzene

100-41-4

1560

40000

0.24

Fluoranthene

206-44-0

620

16400

276

Fluorene

86-73-7

620

16400

44

Hexachloro-1,3-butadiene

87-68-3

3.1

73

0.26

2-Hexanone (Methyl n-butyl ketone)

591-78-6

625

16352

1.9

Indeno(1,2,3-cd)pyrene

193-39-5

0.88

8

3

Isopropyl benzene (Cumene)

98-82-8

1564

40880

2

Isopropyl ether (diisopropyl ether)

108-20-3

156

4088

0.37

Lead

7439-92-1

400

400

270

Methanol

67-56-1

7821

204400

14

Methyl ethyl ketone (MEK)

78-93-3

9385

245280

0.7

Methyl tert-butyl ether (MTBE)

1634-04-4

156

4088

0.92

Methylene chloride

75-09-2

85

763

0.02

2-Methylnaphthalene

91-57-6

63

1635

1.72

4-Methylphenol

106-44-5

78

2044

0.0174

Naphthalene

91-20-3

63

1635

0.58

Phenanthrene

85-01-8

469

12264

60

n-Propylbenzene

103-65-1

156

4088

2

Pyrene

129-00-0

469

12264

286

Silver

7440-22-4

78.2

2044

0.23

Styrene (ethenylbenzene)

100-42-5

3128

81760

2.24

1,1,2,2-Tetrachlorethane

79-34-5

3

28

0.001

Tetrachloroethylene (PCE, perchloroethylene)

127-18-4

12

110

0.0074

1,2,4-Trichlorobenzene

120-82-1