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DELAWARE RIVER BASIN COMMISSION

 

FINAL

Amendments to the Water Quality Regulations, Water Code and Comprehensive Plan to Update Water Quality Criteria for Toxic Pollutants in the Delaware Estuary and Extend These Criteria to Delaware Bay

Proposed: Delaware Register of Regulations (14 DE Reg. 70-83 (08/01/2010)) on August 1, 2010.

Adopted: December 8, 2010 by the Delaware River Basin Commission, Pamela M. Bush, Esq., Secretary.

Filed: April 21, 2011.

Authority: Laws of 1961, Chapter 13, Approved May 1, 1961 (Delaware River Basin Compact).

Effective Date: Upon publication in the Delaware Register of Regulations. The rule was incorporated by reference

into the Code of Federal Regulations effective March 23, 2011.

Expiration Date: N/A

The Delaware River Basin Commission ("Commission" or "DRBC") is a Federal-state regional agency charged with managing the water resources of the Delaware River Basin without regard to political boundaries. Its members are the governors of the four Basin states – Delaware, New Jersey, New York and Pennsylvania – and the North Atlantic Division Commander of the U.S. Army Corps of Engineers, representing the Federal government. The DRBC is not subject to the requirements of the Delaware Administrative Procedure Act. The purpose of this notice is to advise the public that duly adopted regulations of the Commission have been filed with the State of Delaware in accordance with Section 14.2 of the Delaware River Basin Compact.

Summary: By Resolution No. 2010-13 on December 8, 2010, the Commission approved amendments to its Water Quality Regulations, Water Code and Comprehensive Plan updating the Commission's human health and aquatic life stream quality objectives (also called “water quality criteria”) for toxic pollutants in the Delaware Estuary (DRBC Water Quality Zones 2 through 5) and extended application of the criteria to Delaware Bay (DRBC Water Quality Zone 6).

Supplemental Information: Notice of the proposed amendments appeared in the Delaware Register of Regulations (14 DE Reg. 70-83 (08/01/2010)) on August 1, 2010, as well as in the Federal Register (75 FR 41106) on July 15, 2010, the New Jersey Register (42 N.J.R. 1702(a)) on August 2, 2010, the New York State Register (p. 6) on July 21, 2010, and the Pennsylvania Bulletin (40 Pa. B. 4208) on July 31, 2010. A public hearing was held on September 23, 2010 and written comments were accepted through October 1, 2010. The commission received two written submissions and no oral testimony on the proposed changes. The Commission made minor revisions to the proposed amendments in response to the comments received. A comment and response document setting forth the Commission’s responses and revisions in detail was approved by the Commission simultaneously with adoption of the final rule.

Resolution No. 2010-13, the text of the final rule, a copy of the comment and response document, and a basis and background document published simultaneously with the proposed rule are available on the Commission’s web site, at http://www.state.nj.us/drbc/toxics_info.htm.

Rule Text: DRBC Resolution No. 2010-13 amends Article 3 of the Water Code and Administrative Manual - Part III Water Quality Regulations as shown below. Additions to the Water Code and Water Quality Regulations are printed in BOLD FACE and deletions are printed in [BOLD FACE ENCLOSED IN BRACKETS]. BOLD FACE UNDERSCORE indicates changes made in response to comments received during the public comment period. Asterisks indicate ellipsis of rule text retained without changes. [Editor’s instructions appear in normal text in brackets.]

Section 3.10.3 Stream Quality Objectives

C. Aquatic Life Objectives for Toxic Pollutants. It is the policy of the Commission to designate numerical stream quality objectives for the protection of aquatic life for the Delaware River Estuary and Bay (Zones 2 through 6 [5]) which correspond to the designated uses of each zone. Aquatic life objectives for the protection from both acute and chronic effects are herein established on a pollutant-specific basis for:

D. Human Health Objectives for Toxic Pollutants. It is the policy of the Commission to designate numerical stream quality objectives for the protection of human health for the Delaware River Estuary and Bay (Zones 2 through 6 [5]) which correspond to the designated uses of each zone. Stream quality objectives for protection from both carcinogenic and systemic effects are herein established on a pollutant-specific basis for:

3.10.3.D.6. A rate of ingestion of water of 2.0 liters per day is assumed in calculating objectives for river zones where the designated uses include public water supplies after reasonable treatment. A rate of ingestion of fish of [6.5] 17.5 grams per day (equivalent to consuming a ½ pound portion every [35] 13 days) is assumed in calculating freshwater and marine stream quality objectives for the protection of human health. [A rate of ingestion of fish of 37 grams per day (equivalent to consuming a ½ pound portion every 6 days) is assumed in calculating marine stream quality objectives for human health.]

3.10.3.D.8. Numerical criteria for toxic pollutants to protect the taste and odor of ingested water and fish shall be applied as stream quality objectives in [the Estuary] Zones 2 - 6 if these criteria are more stringent than the calculated human health objectives for carcinogens or systemic toxicants.

Section 3.30 Interstate Streams – Tidal.

3.30.2 Zone 2.

[Amend Tables 3, 5, 6 and 7 following subsection 3.30.2 as indicated to update current criteria: remove and add compounds.]

TABLE 3: MAXIMUM CONTAMINANT LEVELS TO BE APPLIED AS HUMAN HEALTH STREAM QUALITY OBJECTIVES IN ZONES 2 AND 3 OF THE DELAWARE RIVER ESTUARY.

 
Parameter
Maximum Contaminant Level (µg/l)
Metals
[Antimony]
[6]
Arsenic
[50] 10
Barium
[2.0 mg/l] 2000
Beryllium
4
[Cadmium]
[5]
Chromium (trivalent) [(total)]
100
Copper
1300
[Nickel]
[100]
Lead
15
Selenium
50
Pesticides/PCBs
alpha-BHC
0.2
beta-BHC
0.2
gamma - BHC (Lindane)
[0.2] 2
2,4-Dichloro-phenoxyacetic acid (2,4-D)
70
Methoxychlor
40
Toxaphene
3
Dioxin (2,3,7,8-TCDD)
0.00003
2,4,5 Trichloro-phenoxypropionic acid (2,4,5-TP-Silvex)
50
Volatile Organic Compounds (VOCs)
Benzene
5
Carbon Tetrachloride
5
1,2-Dichloroethane
5
1,1-Dichloroethylene
7
[1,2 - trans – Dichloroethene] 1,2 - trans - Dichloroethylene
100
Dichloromethane (methylene chloride)
5
[1,2 – Dichloropropane]
[5]
[Ethylbenzene]
[700]
Tetrachloroethylene (PCE)
5
Toluene
1000
Total Trihalomethanes
[100] 80
[1,2,4 – Trichlorobenzene]
[70]
1,1,1-Trichloroethane
200
1,1,2-Trichloroethane
5
Trichloroethylene
5
Vinyl Chloride
2
Polycyclic Aromatic Hydrocarbons (PAHs)
Benzo(a)Pyrene
0.2
Other Compounds
Asbestos
7 million fibers/L
Bis(2-Ethylhexyl) Phthalate
6
Fluoride
4,000
Nitrate
10,000
Pentachlorophenol
1
Dioxin (2,3,7,8-TCDD)
0.00003

TABLE 5: STREAM QUALITY OBJECTIVES FOR TOXIC POLLUTANTS FOR THE PROTECTION OF AQUATIC LIFE IN THE DELAWARE RIVER ESTUARY AND BAY.

 
 
Parameter
Freshwater Objectives (µg/l)
Marine Objectives (µg/l)
Acute
Chronic
Acute
Chronic
Metals [(Values indicated are total recoverable;
See Section 3.10.3.C.2. for form of metal)]
Aluminuma,b
750
87
[-] NA
[-] NA
Arsenic (trivalent) c
[360] 340
[190] 150
69
36
Cadmium c
[e(1.128*LN(Hardness)-3.828)] 0.651*EXP(1.0166*
LN(hardness)-3.924)
[e(0.7852*LN(Hardness)-3.49)] 0.651*EXP(0.7409*
LN(hardness)-4.719)
[43] 40
[9.3] 8.8
Chromium (trivalent) c
[e(0.8190*LN(Hardness)+3.688)] 0.277*EXP(0.819*
LN(hardness)+3.7256)
[e(0.8190*LN(Hardness)+1.561)] 0.277*EXP(0.819*
LN(hardness)+0.6848)
[-] NA
[-] NA
Chromium (hexavalent) c
16
11
1,100
50
Copper c
[e(0.9422*LN(Hardness)-1.464)] 0.908*EXP(0.9422*
LN(hardness)-1.7)
[e(0.8545*LN(Hardness)-1.465)] 0.908*EXP(0.8545*
LN(hardness)-1.702)
[5.3] 4.8
[3.4] 3.1
Lead c
[48] 38
[16] 5.4
[220] 210
[8.5] 8.1
Mercury c
[2.4] 1.4
[0.012] 0.77
[2.1] 1.8
[0.025] 0.94
Nickel c
[e(0.846*LN(Hardness)+3.3612)] 0.846*EXP(0.846*
LN(hardness)+2.255)
[e(0.846*LN(Hardness)+1.1645)] 0.846*EXP(0.846*
LN(hardness)+0.0584)
[75] 64
[8.3] 22
Seleniuma
20
5.0
[300] 290
71
Silver c
[e(1.72*LN(Hardness)-6.52)] 0.85*EXP(1.72*
LN(hardness)-6.59)
[-] NA
[2.3] 1.9
[-] NA
Zinc c
[e(0.8473*LN(Hardness)+0.8604)] 0.95*EXP(0.8473*
LN(hardness)+0.884)
[e(0.8473*LN(Hardness)+0.7614)] 0.95*EXP(0.8473*
LN(hardness)+0.884)
[95] 90
[86] 81
Pesticides/PCBs
Aldrin
[1.5] 3
[-] NA
[0.65] 1.3
[-] NA
gamma - BHC (Lindane)
[1.0] 0.95
[0.08] NA
[0.08] 0.16
[-] NA
Chlordane
[1.2] 2.4
0.0043
[0.045] 0.09
0.004
Chlorpyrifos (Dursban)
0.083
0.041
0.011
0.0056
DDT and metabolites (DDE & DDD) d
[0.55] 1.1
0.001
[0.065] 0.13
0.001
Dieldrin
[1.25] 0.24
[0.0019] 0.056
[0.355] 0.71
0.0019
Endosulfan e
[0.11] 0.22
0.056
[0.017] 0.034
0.0087
Endrin
[0.09] 0.086
[0.0023] 0.036
[0.019] 0.037
0.0023
Heptachlor
[0.26] 0.52
0.0038
[0.027] 0.053
0.0036
Heptachlor Epoxide
0.52
0.0038
0.053
0.0036
Parathion
0.065
0.013
[-] NA
[-] NA
PCBs (Total)
1.0
0.014
5.0
0.03
Toxaphene
0.73
0.0002
0.21
0.0002
Other Compounds
Cyanide (free) [(total)]
22
5.2
[1.0] [2.7] 1
[-] 1
Pentachlorophenol
e(1.005*pH-4.83)
e(1.005*pH-5.29)
13
7.9
Indicator Parameters
Whole Effluent Toxicity
0.3 Toxic Units acute
1.0 Toxic Units chronic
0.3 TUa
1.0 TUc
 

Footnotes to Table 5:

a Total recoverable criteria

b Aluminum criteria listed are restricted to waters with pH between 6.5 and 9.0.

c Dissolved criteria

d Criteria apply to DDT and its metabolites (i.e., the total concentration of DDT and its metabolites should not exceed this value).

e Values were derived from data for endosulfan and are most appropriately applied to the sum of alpha-endosulfan and beta-endosulfan.

Criteria for cadmium, chromium (trivalent), copper, nickel, silver and zinc are hardness-dependent and are expressed as the dissolved form (see Section 3.10.3.C.2. on form of metal).

TABLE 6: STREAM QUALITY OBJECTIVES FOR CARCINOGENS FOR THE DELAWARE RIVER ESTUARY AND BAY.

 
PARAMETER
[EPA class]
FRESHWATER OBJECTIVES
(µg/l)
MARINE
OBJECTIVES (µg/l)
FISH & WATER
INGESTION
FISH
INGESTION
ONLY
FISH
INGESTION
ONLY
Metals
Arsenic
 
* [0.017]
NA
NA
[Beryllium]
 
[0.00767]
[0.132]
[0.0232]
Pesticides/PCBs
Aldrin
[B2]
[0.00189] 0.000049
[0.0226] 0.000050
[0.00397] 0.000050
Alpha – BHC
[B2]
[0.00391] 0.0026
[0.0132] 0.0049
[0.00231] 0.0049
beta – BHC
[C]
0.0091
0.017
0.017
Chlordane
[B2]
[0.000575] 0.00080
[0.000588] 0.00081
[0.000104] 0.00081
DDD
[B2]
[0.00423] 0.00031
[0.00436] 0.00031
[0.000765] 0.00031
DDE
[B2]
[0.00554] 0.00022
[0.00585] 0.00022
[0.00103] 0.00022
DDT
[B2]
[0.000588] 0.00022
[0.000591] 0.00022
[0.000104] 0.00022
Dieldrin
[B2]
[0.000135] 0.000052
[0.000144] 0.000054
[0.0000253] 0.000054
Heptachlor
[B2]
[0.000208] 0.000079
[0.000214] 0.000079
[0.0000375] 0.000079
Heptachlor Epoxide
[B2]
[0.000198] 0.000039
[0.000208] 0.000039
[0.0000366] 0.000039
PCBs (Total)
[B2]
0.0000444
0.0000448
0.0000079
Toxaphene
[B2]
[0.000730] 0.00028
[0.000747] 0.00028
[0.000131] 0.00028
Volatile Organic Compounds (VOCs)
Acrylonitrile
[B1]
[0.0591] 0.051
[0.665] 0.25
[0.117] 0.25
Benzene
[A]
[1.19] 0.61
[71.3] 14
[12.5] 14
Benzidine
[A]
[0.000118] 0.000086
[0.000535] 0.00020
[0.000094] 0.00020
Bromoform
[B2]
[4.31] 4.3
[164.0] 140
[28.9] 140
Bromodichloromethane
[B2]
[0.559] 0.55
[55.7] 17
[9.78] 17
Carbon Tetrachloride
[B2]
[0.254] 0.23
[4.42] 1.6
[0.776] 1.6
Chlorodibromomethane
[C]
[0.411] 0.40
[27.8] 13
[4.88] 13
Chloroform
[B2]
[5.67] 5.7
[471.0] 470
[82.7] 470
3,3 – Dichlorobenzidine
[B2]
[0.0386] 0.021
[0.0767] 0.028
[0.0135] 0.028
1,2 – Dichloroethane
[B2]
[0.383] 0.38
[98.6] 37
[17.3] 37
[1,1 – Dichloroethene]
[C]
[0.0573]
[3.20]
[0.562]
1,2 – Dichloropropane
[B2]
0.50
15
15
1,3 – Dichloropropene
[B2]
[87.0] 0.34
[14.1] 21
[2.48] 21
Dichloromethane (Methylene chloride)
[B2]
[4.65] *
[1,580] 590
[277] 590
[Tetrachloroethene] Tetrachloroethylene
[B2]
[0.80] 0.69
[8.85] 3.3
[1.55] 3.3
[1,1,1,2 – Tetrachloroethane]
[C]
[1.29]
[29.3]
[5.15]
1,1,2,2 – Tetrachloroethane
[C]
[0.172] 0.17
[10.8] 4.0
[1.89] 4.0
1,1,2 – Trichloroethane
[C]
[0.605] 0.59
[41.6] 16
[7.31] 16
[Trichloroethene] Trichloroethylene
[B2]
[2.70] 2.5
[80.7] 30
[14.2] 30
Vinyl Chloride
[A]
[2.00] 0.025
[525.0] 2.4
[92.9] 2.4
Polycyclic Aromatic Hydrocarbons (PAHs)
Benz[a]anthracene
[B2]
[0.00171] 0.0038
[0.00177] 0.18
[0.00031] 0.18
Benzo[b]fluoranthene
[B2]
[0.000455] 0.038
[0.000460] 0.18
[0.000081]0.18
Benzo[k]fluoranthene
[B2]
[0.000280] 0.38
[0.000282] 1.8
[0.000049] 1.8
Benzo[a]pyrene
[B2]
[0.0000644] 0.0038
[0.0000653] 0.018
[0.0000115] 0.018
Chrysene
[B2]
[0.0214] 3.8
[0.0224] 18
[0.00394] 18
Dibenz[a,h]anthracene
[B2]
[0.0000552] 0.0038
[0.0000559] 0.018
[0.0000098] 0.018
Indeno[1,2,3-cd]pyrene
[B2]
[0.0000576] 0.038
[0.0000576] 0.18
[0.0000101] 0.18
Other Compounds
Bis (2-chloroethyl) ether
[B2]
[0.0311] 0.03
[1.42] 0.53
[0.249] 0.53
Bis (2-ethylhexyl) phthalate
[B2]
[1.76] 1.2
[5.92] 2.2
[1.04] 2.2
[Dinitrotoluene mixture (2,4 & 2,6)]
2,4 - Dinitrotoluene
 
[B2]
 
[17.3] 0.11
 
[1420] 3.4
 
[249] 3.4
1,2 – Diphenylhydrazine
[B2]
[0.0405] 0.036
[0.541] 0.2
[0.095] 0.2
Hexachlorobenzene
[B2]
[0.000748] 0.00028
[0.000775] 0.00029
[0.000136] 0.00029
Hexachlorobutadiene
[C]
[0.445] 0.44
[49.7] 18
[8.72] 18
Hexachloroethane
[C]
[1.95] 1.4
[8.85] 3.3
[1.56] 3.3
Isophorone
[B2]
[36.3] 35
[2590] 960
[455] 960
N-Nitrosodi-N-butylamine
[B2]
0.0063
14
14
N-Nitrosodi-N-methylamine
[B2]
[0.000686] 0.00069
[8.12] 3.0
[1.43] 3.0
N-Nitrosodiethylamine
[B2]
0.0008
1.24
1.24
N-Nitrosodi-N-phenylamine
[B2]
[4.95] 3.3
[16.2] 6
[2.84] 6
N-Nitrosodi-N-propylamine
[B2]
[0.00498] 0.0050
[1.51] 0.51
[0.265] 0.51
N-Nitrosopyrrolidine
[B2]
0.016
34
34
Pentachlorophenol
[B2]
[0.282] 0.27
[8.16] 3.0
[1.43] 3.0
Dioxin (2,3,7,8 – TCDD)
[NA]
[1.3 x 10-8] 0.000000005
[1.4 x 10-8] 0.0000000051
[2.4 x 10-9] 0.0000000051
2,4,6 – Trichlorophenol
[B2]
[2.14] 1.4
[6.53] 2.4
[1.15] 2.4

* The MCL for this compound applies in Zones 2 and 3 and is listed in Table 3.

TABLE 7: STREAM QUALITY OBJECTIVES FOR SYSTEMIC TOXICANTS FOR THE DELAWARE RIVER ESTUARY AND BAY

 
 
 
PARAMETER
 
[EPA
Class]
FRESHWATER
OBJECTIVES (µg/l)
MARINE
OBJECTIVES (µg/l)
FISH & WATER
INGESTION
FISH INGESTION
ONLY
FISH INGESTION ONLY
Metals
Antimony
 
[14.0] 5.6
[4,310] 640
[757] 640
Arsenic
[A]
[9.19] *
[73.4] NA
[12.9] NA
Beryllium
[B2]
[165] *
[2,830] [42] 420
[498] [42] 420
Cadmium
 
[14.5] 3.4
[84.1] 16
[14.8] 16
Chromium (trivalent)
 
[33,000] *
[673,000] 380,000
[118,000] 380,000
[Hexavalent] Chromium (hexavalent)
[A]
[166] 92
[3,370] NA
[591] NA
Chromium (Total)
 
NA
750
750
Mercury
 
[0.144] 0.050
[0.144] 0.051
[0.144] 0.051
Methylmercury
 
0.3 mg/kg fish tissue
0.3 mg/kg fish tissue
0.3 mg/kg fish tissue
Nickel
 
[607] 500
[4,580] 1,700
[805] 1,700
Selenium
 
[100] 170
[2,020] 4,200
[355] 4,200
Silver
 
[175] 170
[108,000] 40,000
[18,900] 40,000
Thallium
 
[1.70] 0.24
[6.20] 0.47
[1.10] 0.47
Zinc
 
[9110] 7,400
[68700] 26,000
[12100] 26,000
Pesticides/PCBs
Aldrin
[B2]
[0.96] 0.025
[11.5] 0.025
[2.03] 0.025
gamma - BHC (Lindane)
 
[7.38] 0.98
[24.9] 1.8
[4.37] 1.8
Chlordane
[B2]
[0.0448] 0.14
[0.0458] 0.14
[0.00805] 0.14
DDT and Metabolites (DDD and DDE)
[B2]
[0.100] 0.037
[0.100] 0.037
[0.0176] 0.037
Dieldrin
[B2]
[0.108] 0.041
[0.115] 0.043
[0.020] 0.043
[Endosulfan]
 
[111]
[239]
[42.0]
alpha –Endosulfan
 
62
89
89
beta- Endosulfan
 
62
89
89
Endosulfan Sulfate
 
62
89
89
Endrin
[D]
[0.755] 0.059
[0.814] 0.060
[0.143] 0.060
Endrin Aldehyde
 
0.29
0.30
0.30
Heptachlor
[B2]
[0.337] 0.18
[0.344] 0.18
[0.060] 0.18
Heptachlor Epoxide
[B2]
[0.0234] 0.0046
[0.0246] 0.0046
[0.00433] 0.0046
Total PCBs
[B2]
0.00839
0.00849
0.00149
Volatile Organic Compounds (VOCs)
Acrolein
 
[320] 6.1
[780] 9.3
[137] 9.3
Benzene
 
*
3,100
3,100
Bromoform
[B2]
[682] 650
[25,900] 9,600
[4,560]9,600
Bromodichloromethane
[B2]
[693] 680
[69,000] NA
[12,100] NA
Dibromochloromethane
[C]
[690] 680
[46,600] 21,000
[8,190] 21,000
Carbon Tetrachloride
[B2]
[23.1] *
[402] 150
[70.6] 150
Chloroform
[B2]
[346] 68
[28,700] 2,100
[5,050] 2,100
Chlorobenzene
[D]
[677] 130
[20,900] 1,600
[3,670] 1,600
[1,1 – Dichloroethene]
1,1 – Dichloroethylene
[C]
[309] *
[17,300] 7,100
[3,040] 7,100
[1,2 - trans – Dichloroethene]
1,2 - trans – Dichloroethylene
 
[696] 140
[136,000] 10,000
[23,900] 10,000
1,3 – Dichloropropene
[B2]
[10.4] 1,000
[1,690] 63,000
[297] 63,000
Ethylbenzene
 
[3,120] 530
[28,700] 2,100
[5,050] 2,100
Methyl Bromide
 
[49.0] 47
[N/A] 1,500
[N/A] 1,500
Methylene Chloride
[B2]
[2,090] *
[710,000] 260,000
[125,000] 260,000
1,1,2 – Trichloroethane
[C]
[138] *
[9,490] 3,600
[1,670] 3,600
[Tetrachloroethene]
Tetrachloroethylene
 
[318] *
[3,520] 1,300
[618] 1,300
[1,1,1,2 – Tetrachloroethane]
[C]
[1,000]
[22,400]
[3,940]
Toluene
 
[6,760] 1,300
[201,000] 15,000
[35,400] 15,000
Polycyclic Aromatic Hydrocarbons (PAHs)
Anthracene
[D]
[4,110] 8,300
[6,760] 40,000
[1,190] 40,000
Fluoranthene
 
[296] 130
[375] 140
[65.8] 140
Fluorene
[D]
[730] 1,100
[1,530] 5,300
[268] 5,300
Pyrene
[D]
[228] 830
[291] 4,000
[51.1] 4,000
Other Compounds
Acenaphthene
 
[1,180] 670
[2,670] 990
[469] 990
Benzidine
[A]
[81.8] 59
[369] 140
[64.9] 140
Bis (2-chloroisopropyl) ether
 
[1,390] 1,400
[174,000] 65,000
[30,600] 65,000
Bis (2-ethylhexyl) phthalate
[B2]
[492] *
[1,660] 620
[291] 620
Butylbenzyl phthalate
[C]
[298] 1,500
[520] 1,900
[91.4] 1,900
2 – Chloronaphthalene
 
1,000
1,600
1,600
2 – Chlorophenol
 
[122] 81
[402] 150
[70.6] 150
Cyanide
 
140
140
140
Dibutyl Phthalate
[D]
[2,710] 2,000
[12,100] 4,500
[2,130] 4,500
1,2 – Dichlorobenzene
[D]
[2,670] 420
[17,400] 1,300
[3,060] 1,300
1,3 – Dichlorobenzene
[D]
[414] 420
[3,510] 1,300
[617] 1,300
1,4 – Dichlorobenzene
 
[419] 63
[3,870] 190
[677] 190
2,4 – Dichlorophenol
 
[92.7] 77
[794] 290
[139] 290
Diethyl Phthalate
[D]
[22,600] 17,000
[118,000] 44,000
[20,700] 44,000
Dimethyl Phthalate
[D]
[313,000] 270,000
[2,990,000] 1,100,000
[526,000] 1,100,000
2,4 – Dimethylphenol
 
[536] 380
[2,300] 850
[403] 850
2,4 – Dinitrophenol
 
[70] 69
[14,300] 5,300
[2,500] 5,300
2,4 – Dinitrotoluene
 
[69.2] 68
[5670] 2,100
[996] 2,100
Hexachlorobenzene
[B2]
[0.958] 0.35
[0.991] 0.36
[0.174] 0.36
[Hexachlorobutadiene]
[C]
[69.4]
[7,750]
[1,360]
Hexachlorocyclopentadiene
 
[242] 40
[17,400] 1,100
[3,050] 1,100
Hexachloroethane
[C]
[27.3] 20
[124] 46
[21.7] 46
Isophorone
[C]
[6,900] 6,700
[492,000] 180,000
[86,400] 180,000
2-Methyl-4,6-dinitrophenol
 
13
280
280
Nitrobenzene
[D]
[17.3] 17
[1,860] 690
[327] 690
Pentachlorobenzene
 
1.4
1.5
1.5
Pentachlorophenol
 
[1,010] *
[29,400] 11,000
[5,160] 11,000
Phenol
 
[20,900] 10,000
[4,620,000] 860,000
[811,000] 860,000
1,2,4,5-Tetrachlorobenzene
 
0.97
1.1
1.1
1,2,4 – Trichlorobenzene
[D]
[255] 35
[945] 70
[166] 70
2,4,5-Trichlorophenol
 
1,800
3,600
3,600
Vinyl Chloride
 
*
10,000
10,000

* The MCL for this compound applies in Zones 2 and 3 and is listed in Table 3.

3.30.6 Zone 6.

[Add the following text immediately following sub-section 3.30.6 C.10. and preceding sub-section 3.30.6 D.]

11. Toxic Pollutants.

a. Applicable criteria to protect the taste and odor of ingested water and fish are presented in Table 4.

b. Applicable marine stream quality objectives for the protection of aquatic life are presented in Table 5.

c. Applicable marine stream quality objectives for the protection of human health are presented in Tables 6 and 7.

Dated: April 21, 2011

Pamela M. Bush, Esquire

Commission Secretary

14 DE Reg. 1330 (06/01/11) (Final)
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