Alaska Administrative Code › Title 18 - Environmental Conservation › Chapter 75 - Oil and Other Hazardous Substances Pollution Control › Article 3 - Discharge Reporting, Cleanup, and Disposal of Oil and Other Hazardous Substances › 18 AAC 75.345 - Groundwater and surface water cleanup levels

Current through May 31, 2024
(a) Except as
				otherwise provided in this section, cleanup of a discharge or release of a
				hazardous substance to groundwater or surface water must meet the requirements
				of this section.
(b) Contaminated
				groundwater must meet
(1) the cleanup levels
				in Table C if the current use or the reasonably expected potential future use
				of the groundwater, determined under
				18 AAC 75.350, i s a drinking
				water source;
TABLE C. GROUNDWATER CLEANUP
								LEVELS
Hazardous Substance
CAS
								Number1
Health effect that
drives risk;
carcinogen (ca)
noncarcinogen (nc);
mutagen (m)
Groundwater Human Health Cleanup
								Level2 (micrograms/liter)
Acenaphthene
83-32-9
nc
530
Acenaphthylene3
208-96-8
nc
260
Acetone
67-64-1
nc
14000
Aldrin
309-00-2
ca
0.0092
Ammonium Perchlorate
7790-98-9
nc
14
Anthracene
120-12-7
nc
434
Antimony (metallic)
7440-36-0
nc
7.8
Arsenic,
								Inorganic3
7440-38-2
ca
0.52
Barium
7440-39-3
nc
3800
Benz[a]anthracene
56-55-3
m
0.12
Benzaldehyde
100-52-7
nc
1900
Benzene
71-43-2
ca
4.6
Benzo[a]pyrene
50-32-8
m
0.034
Benzo[b]fluoranthene
205-99-2
m
0.34
Benzo[g,h,i]perylene3
191-24-2
nc
0.264
Benzo[k]fluoranthene
207-08-9
m
0.804
Benzoic Acid
65-85-0
nc
75000
Benzyl Alcohol
100-51-6
nc
2000
Beryllium and compounds
7440-41-7
nc
25
Bis(2-chloroethyl)ether
111-44-4
ca
0.14
Bis(2-ethylhexyl)phthalate
117-81-7
ca
56
Bromobenzene
108-86-1
nc
62
Bromodichloromethane
75-27-4
ca
1.3
Bromoform
75-25-2
ca
33
Bromomethane
74-83-9
nc
7.5
Butadiene, 1,3 -
106-99-0
ca
0.18
Butanol, N-
71-36-3
nc
2000
Butyl Benzyl Phthalate
85-68-7
ca
160
Butylbenzene, n-
104-51-8
nc
1000
Butylbenzene, sec-
135-98-8
nc
2000
Butylbenzene, tert-
98-06-6
nc
690
Cadmium (Diet)
7440-43-9
nc
9.2
Carbon Disulfide
75-15-0
nc
810
Carbon Tetrachloride
56-23-5
ca
4.6
Chlordane
12789-03-6
ca
0.20
Chlordecone (Kepone)
143-50-0
ca
0.035
Chloroaniline, p-
106-47-8
ca
3.7
Chlorobenzene
108-90-7
nc
78
Chloroform
67-66-3
ca
2.2
Chloromethane
74-87-3
nc
190
Chloronaphthalene, Beta-
91-58-7
nc
750
Chlorophenol, 2-
95-57-8
nc
91
Chromium(Ill), Insoluble
								Salts6
16065-83-1
nc
22000
Chromium(VI)6
18540-29-9
m
0.35
Chrysene
218-01-9
m
2.04
Copper
7440-50-8
nc
800
Cresol, m-
108-39-4
nc
930
Cresol, o-
95-48-7
nc
930
Cresol, p-
106-44-5
nc
1900
Cumene
98-82-8
nc
450
Cyanide (CN-)
57-12-5
nc
1.5
Cyclohexane
110-82-7
nc
13000
DDD
72-54-8
ca
0.32
DDE, p,p'-
72-55-9
ca
0.46
DDT
50-29-3
ca
2.3
Dibenz[a,h]anthracene
53-70-3
m
0.034
Dibenzofuran
132-64-9
nc
7.9
Dibromochloromethane
124-48-1
ca
8.7
Dibromoethane, 1,2- (Ethylene Dibromide)
106-93-4
ca
0.075
Dibromomethane (Methylene Bromide)
74-95-3
nc
8.3
Dibutyl Phthalate
84-74-2
nc
900
Dichlorobenzene, 1,2-
95-50-1
nc
300
Dichlorobenzene,
								1,3-3
541-73-1
nc
300
Dichlorobenzene, 1,4-
106-46-7
ca
4.8
Dichlorobenzidine, 3,3'-
91-94-1
ca
1.3
Dichlorodifluoromethane
75-71-8
nc
200
Dichloroethane, 1,1-
75-34-3
ca
28
Dichloroethane, 1,2-
107-06-2
ca
1.7
Dichloroethylene, 1,1-
75-35-4
nc
280
Dichloroethylene, 1,2-cis-
156-59-2
nc
36
Dichloroethylene, 1,2-trans-
156-60-5
nc
360
Dichlorophenol, 2,4-
120-83-2
nc
46
Dichlorophenoxy Acetic Acid, 2,4-
94-75-7
nc
170
Dichloropropane, 1,2-
78-87-5
ca
4.4
Dichloropropene, 1,3-
542-75-6
ca
4.7
Dieldrin
60-57-1
ca
0.018
Diethyl Phthalate
84-66-2
nc
15000
Dimethylphenol, 2,4-
105-67-9
nc
360
Dimethylphthalate3
131-11-3
nc
16000
Dinitrobenzene, 1,2-
528-29-0
nc
1.9
Dinitrobenzene, 1,3-
99-65-0
nc
2.0
Dinitrobenzene, 1,4-
100-25-4
nc
2.0
Dinitrophenol, 2,4-
51-28-5
nc
39
Dinitrotoluene, 2,4-
121-14-2
ca
2.4
Dinitrotoluene, 2,6-
606-20-2
ca
0.49
Dinitrotoluene, 2-Amino-4,6-
35572-78-2
nc
39
Dinitrotoluene, 4-Amino-2,6-
19406-51-0
nc
39
Dioxane, 1,4-
123-91-1
ca
4.6
Diphenylamine
122-39-4
nc
310
Endosulfan
115-29-7
nc
100
Endrin
72-20-8
nc
2.3
Ethyl Chloride
75-00-3
nc
21000
Ethylbenzene
100-41-4
ca
15
Ethylene Glycol
107-21-1
nc
40000
Fluoranthene
206-44-0
nc
2604
Fluorene
86-73-7
nc
290
Formaldehyde
50-00-0
ca
4.3
Heptachlor
76-44-8
ca
0.014
Heptachlor Epoxide
1024-57-3
ca
0.014
Hexachlorobenzene
118-74-1
ca
0.098
Hexachlorobutadienc
87-68-3
nc
1.4
Hexachlorocyclohexane, Alpha-
319-84-6
ca
0.072
Hexachlorocyclohexane, Beta-
319-85-7
ca
0.25
Hexachlorocyclohexane, Gamma- (Lindane)
58-89-9
ca
0.42
Hexachlorocyclopentadiene
77-47-4
nc
0.41
Hexachloroethane
67-72-1
ca
3.3
Hexahydro-1,3,5-trinitro-1,3,5-triazine
								(RDX)
121-82-4
ca
7.0
Hexane, N-
110-54-3
nc
1500
Hexanone, 2-
591-78-6
nc
38
Hydrazine
302-01-2
ca
0.011
lndeno [1,2,3-cd]pyrene
193-39-5
m
0.194
Isophorone
78-59-1
ca
780
Isopropanol
67-63-0
nc
410
Lead and
								Compounds7
7439-92-1
nc
15
Mercuric
								Chloride3
7487-94-7
nc
5.7
Mercury (elemental)
7439-97-6
nc
0.52
Methanol
67-56-1
nc
20000
Methoxychlor
72-43-5
nc
37
Methyl Ethyl Ketone (2-Butanone)
78-93-3
nc
5600
Methyl Isobutyl Ketone
								(4-methyl-2-pentanone)
108-10-1
nc
6300
Methyl Mercury
22967-92-6
nc
2.0
Methyl tert-Butyl Ether (MTBE)
1634-04-4
ca
140
Methylene Chloride
75-09-2
nc
110
Methylnaphthalene, 1-
90-12-0
ca
11
Methylnaphthalene, 2-
91-57-6
nc
36
Naphthalene
91-20-3
ca
1.7
Nickel Soluble Salts
7440-02-0
nc
390
Nitrobenzene
98-95-3
ca
1.4
Nitroglycerin
55-63-0
nc
2.0
Nitroguanidine
556-88-7
nc
2000
Nitrosodimethylamine, N-
62-75-9
m
0.0011
Nitroso-di-N-propylamine, N-
621 -64-7
ca
0.11
Nitrosodiphenylamine, N-
86-30-6
ca
120
Nitrotoluene, m-
99-08-1
nc
1.7
Nitrotoluene, o-
88-72-2
ca
3.1
Nitrotoluene, p-
99-99-0
nc
43
Octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine
								(HMX)
2691-41-0
nc
1000
Octyl Phthalate, di-N-
117-84-0
nc
224
Pentachlorophenol
87-86-5
ca
0.41
Pentaerythritol tetranitrate (PETN)
78-11-5
nc
39
Perfluorooctane Sulfonate (PFOS) 
								29
1763-23-1
nc
0.40
Perfluorooctanoic Acid (PFOA) 
								29
335-67-1
nc
0.40
Phenanthrene-3
85-01-8
nc
170
Phenol
108-95-2
nc
5800
Phosphorus, White
7723-14-0
nc
0.40
Polychlorinated Biphenyls (PCBs)
1336-36-3
ca
0.50
Propyl benzene
103-65-1
nc
660
Pyrene
129-00-0
nc
120
Selenium
7782-49-2
nc
100
Silver
7440-22-4
nc
94
Styrene
100-42-5
nc
1200
TCDD, 2,3,7,8-8
1746-01-6
ca
1.2 x 10-6
Tetrachloroethane, 1, 1, 1,2-
630-20-6
ca
5.7
Tetrachloroethane, 1,1,2.2-
79-34-5
ca
0.76
Tetrachloroethylene
127-18-4
nc
41
Tetryl (Trinitrophenylmethylnitramine)
479-45-8
nc
39
Thallium (Soluble Salts)
7440-28-0
nc
0.20
Toluene
108-88-3
nc
1100
Toxaphene
8001-35-2
ca
0.71
Trichloro- 1,2,2-trifluoroethane, 1, 1,2-
76-13-1
nc
55000
Trichlorobenzene, 1,2,3-
87-61-6
nc
7.0
Trichlorohenzenc, 1,2,4-
120-82-1
nc
4.0
Trichloroethane, 1,1,1-
71-55-6
nc
8000
Trichloroethane, 1,1,2-
79-00-5
nc
0.41
Trichloroethylene
79-01-6
nc
2.8
Trichlorofluoromethane
75-69-4
nc
5200
Trichlorophenol, 2,4,5-
95-95-4
nc
1200
Trichlorophenol, 2,4,6-
88-06-2
nc
12
Trichlorophenoxyacetic Acid, 2,4,5-
93-76-5
nc
160
Trichlorophenoxypropionic acid, -2,4,5
93-72-1
nc
110
Trichloropropane, 1,2,3-
96-18-4
m
0.0075
Trimethylbenzene, 1,2,4-
95-63-6
nc
15
Trimethylbenzene, 1,3,5-
108-67-8
nc
120
Tri-n-butyltin
688-73-3
nc
3.7
Trinitrobenzene, 1,3,5-
99-35-4
nc
590
Trinitrololueue, 2,4,6-
1 18-96-7
nc
9.8
Vanadium and Compounds
7440-62-2
nc
86
Vinyl Acetate
108-05-4
nc
410
Vinyl Chloride
75-01-4
ca
0.19
Xylenes
1330-20-7
nc
190
Zinc and Compounds
7440-66-6
nc
6000
PETROLEUM HYDROCARBONS
C6-C10
								GRO
nc
2200
C10-C25
								DRO
nc
1500
C25-C36
								RRO
nc
1100
Notes to Table C:
1. "CAS Number" means the Chemical Abstract
				Service (CAS) registry number uniquely assigned to chemicals by the American
				Chemical Society and recorded in the CAS Registry System.
2. The "Human Health" exposure pathway is the
				cumulative exposure pathway through dermal contact, ingestion, and inhalation
				of volatile compounds from hazardous substances in the water.
3. Where one or more toxicological values
				were unavailable, toxicity values from surrogate compounds or other sources
				were used as follows:
(A) pyrene is a
				toxicity surrogate for acenaphthylene, benzo(g,h,i) perylene, and
				phenanthrene;
(B)
				1,2-dichlorobenzene is a toxicity surrogate for 1,3-dichlorobenzene;
(C) diethylphthalate is a toxicity surrogate
				for dimethylphthalate;
(D)
				elemental mercury is a toxicity surrogate for mercuric
				chloride.
4. These levels
				are based on water solubility using the data set out in
Procedures/or
				Calculating Cleanup Levels
, adopted by reference in
				18 AAC 75.340.
5. Due to the prevalence of naturally
				occurring arsenic throughout the state, arsenic at a site will be considered
				background arsenic unless anthropogenic contribution from a source, activity,
				or mobilization by means of another introduced contaminant is known or
				suspected.
6. Due to the prevalence
				of naturally occurring chromium III throughout the state, sample results
				reported for total chromium detected at a site will be considered background
				chromium III unless anthropogenic contribution of chromium III or VI from a
				source, activity, or mobilization by means of another introduced contaminant is
				Known or suspected.
7. The lead
				cleanup level is taken from EPA's action level for lead in water.
8. This cleanup level is for
				2,3,7,8-Tetrachlorordibenzo-p-Dioxin (TCDD) only; all cleanup levels for
				polychlorinated dibenzo-p-dioxin (PCDD) and polychlorinated dibenzofuran (PCDF)
				congeners must be determined on a site-specific basis.
9. Toxicity values for PFOS and PFOA were
				sourced from EPA's
Health Effects Support Document for Perfluorooctane
				Sulfonate (PFOS)
(EPA 822-R-16-002), dated May 2016, and
Health Effects Supports Document for Perfluorooctanatic Acid
				(PFOA)
(EPA 822-R-16-003), dated May 2016.