CHAPTER Env-Wq 1700  SURFACE WATER QUALITY REGULATIONS

 

Statutory Authority:  RSA 485-A:6, I & XI-c and RSA 485-A:8, VI

 

Revision Note #1:

 

Document #7151, effective 12-10-99, readopted with amendments and renumbered the former Chapter Env-Ws 430 as Env-Ws 1700, containing Part Env-Ws 1701 through Part Env-Ws 1709.  Document #7151 made extensive changes to the wording, format, structure, and numbering of rules in the former Chapter Env-Ws 430.  Document #7151 superseded all prior filings for rules in the former Chapter Env-Ws 430.  The prior filings for former Chapter Env-Ws 430 included the following documents:

 

#1881, eff 12-7-81

#2707, eff 5-15-84; EXPIRED 5-15-90

#4896, eff 8-3-90

#6301, INTERIM, eff 8-2-96

#6351, eff 10-5-96

 

Revision Note #2:

 

          Document #9162, effective 5-21-08, readopted with amendments and renumbered former Chapter Env-Ws 1700 as Chapter Env-Wq 1700.  Former Chapter Env-Ws 1700 contained Part Env-Ws 1701 through Part Env-Ws 1709.  The redesignation from subtitle Env-Ws to subtitle Env-Wq was done pursuant to a rules reorganization plan for Department rules approved by the Director of the Office of Legislative Services on 9-7-05.  Document #9162 replaced all prior filings for rules in the former Chapter Env-Ws 1700.  The prior filings included the following documents:

 

          Former Part Env-Ws 1701 through Part Env-Ws 1709:

 

          #7151, eff 12-10-99

          #9034, INTERIM, eff 12-10-07

 

          Former Part Env-Ws 1710 Emergency Water Transfer:

 

          #7669, EMERGENCY, eff 3-29-02, EXPIRED 9-25-02

 

REVISION NOTE #3:

 

            Document #12042, effective 12-1-16, readopted with amendments Env-Wq 1700 and renumbered various rules in the former Env-Wq 1700.  A cross-reference table of the prior rules compared to the rules in Document #12042 is in Appendix B.  Document #12042 replaces all prior filings for rules in the former Chapter Env-Wq 1700.  The prior filings for the former Chapter Env-Wq 1700 since Document #9162 includes the following documents:

 

            #9984, eff 8-23-11, affecting Env-Wq 1708.12

            #10726, eff 11-22-14, affecting Env-Wq 1701.03

 

The rules in the former Chapter Env-Wq 1700 which had last been filed under Document #9162 did not expire on 5-21-16 since they were extended pursuant to RSA 541-A:14-a until replaced by the rules in Document #12042, effective 12-1-16.

 

PART Env-Wq 1701  PURPOSE; APPLICABILITY; COMPLIANCE SCHEDULES

 

        Env-Wq 1701.01  Purpose.  The purpose of these rules is to establish water quality standards for the state’s surface water uses as set forth in RSA 485-A:8, I, II, III and V.  These standards are intended to protect public health and welfare, enhance the quality of water and serve the purposes of the federal Clean Water Act, 33 U.S.C. 1251 et seq., and RSA 485-A.  These standards provide for the protection and propagation of fish, shellfish, and wildlife, and provide for such uses as recreational activities in and on the surface waters, public water supplies, agricultural and industrial uses, and navigation in accord with RSA 485-A:8, I and II.

 

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        Env-Wq 1701.02  Applicability.  These rules shall apply to:

 

        (a)  All surface waters; and

 

        (b)  Any person who:

 

(1)  Causes any point or nonpoint source discharge of any pollutant to surface waters;

 

(2)  Undertakes hydrologic modifications, such as dam construction or water withdrawals; or

 

(3) Undertakes any other activity that affects the beneficial uses or the water quality of surface waters.

 

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        Env-Wq 1701.03  Compliance Schedules in NPDES Permits.

 

        (a)  A National Pollutant Discharge Elimination System (NPDES) permit issued or renewed for a discharge to New Hampshire surface waters, as defined herein, shall not specify a schedule leading to compliance with New Hampshire or federal surface water quality standards, or both, unless:

 

(1)  The permittee cannot comply with the permit limits or other requirements immediately upon issuance of the permit; and

 

(2)  The compliance schedule is provided to afford the permittee adequate time to comply with one or more permit requirements or limitations that are based on new, newly interpreted, or revised water quality standards that became effective after issuance of the original discharge permit and after July 1, 1977.

 

        (b)  A compliance schedule established to meet any surface water quality standard that applies to the New Hampshire waters receiving the discharge shall:

 

(1)  Include dates for specified tasks or activities leading to compliance;

 

(2)  Include interim effluent limits as the U.S. Environmental Protection Agency (EPA) deems necessary; and

 

(3)  Require compliance at the earliest practicable time.

 

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PART Env-Wq 1702  DEFINITIONS

 

        Env-Wq 1702.01  7Q10” means the lowest average flow that occurs for 7 consecutive days on an annual basis with a recurrence interval of once in 10 years on average, expressed in terms of volume per time period.

 

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        Env-Wq 1702.02  Acute toxicity” means an adverse effect such as mortality or debilitation caused by an exposure of 96 hours or less to a toxic substance.

 

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        Env-Wq 1702.03  Antidegradation” means a provision of the water quality standards that maintains and protects existing water quality and uses.

 

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        Env-Wq 1702.04  Assimilative capacity” means the amount of a pollutant or combination of pollutants that can safely be released to a waterbody without causing violations of applicable water quality criteria or negatively impacting uses.

 

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        Env-Wq 1702.05  Benthic community” mean the community of plants and animals that live on, over, or in the substrate of the surface water.

 

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        Env-Wq 1702.06  Benthic deposit” means any sludge, sediment, or other organic or inorganic accumulations on the bottom of the surface water.

 

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        Env-Wq 1702.07  “Best management practices” means those practices that are determined, after problem assessment and examination of all alternative practices and technological, economic, and institutional considerations, to be the most effective practicable means of preventing or reducing the amount of pollution generated by point or nonpoint sources to a level compatible with water quality goals.

 

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        Env-Wq 1702.08  Biological integrity” means the ability of an aquatic ecosystem to support and maintain a balanced, integrated, adaptive community of organisms having a species composition, diversity, and functional organization comparable to that of similar natural habitats of a region.

 

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        Env-Wq 1702.09  Biota” means species of plants or animals occurring in surface waters.

 

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        Env-Wq 1702.10  Chronic toxicity” means an adverse effect, such as reduced reproductive success or growth or poor survival of sensitive life stages, that occurs as a result of prolonged exposure to a toxic substance.

 

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        Env-Wq 1702.11  “Class A and B waters” means those surface waters that are legislatively classified as Class A or B waters pursuant to RSA 485-A:8, I, II and III.

 

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        Env-Wq 1702.12  Clean Water Act (CWA)” means the federal Clean Water Act, Pub. L. 92-500, as amended by Pub. L. 95-217, Pub. L. 95-576, Pub. L. 96-483, Pub. L. 97-117, Pub. L. 100-4, 33 U.S.C. 1251 et seq.

 

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        Env-Wq 1702.13  Community” means one or more populations co-occurring in surface waters.

 

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        Env-Wq 1702.14  Criterion” means:

 

        (a)  A designated concentration of a pollutant;

 

        (b)  A narrative statement concerning that pollutant that when not exceeded, will protect an organism, a population, a community, or a prescribed water use; or

 

        (c)  A numeric value or narrative statement related to other characteristics of the surface waters, such as flow and biological community integrity.

 

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        Env-Wq 1702.15  Cultural eutrophication” means the human-induced addition of wastes that contain nutrients to surface waters, resulting in excessive plant growth or a decrease in dissolved oxygen, or both.

 

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        Env-Wq 1702.16  Department” means the department of environmental services.

 

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        Env-Wq 1702.17  Designated uses” means those uses specified in water quality standards for each waterbody or segment whether or not such uses are presently occurring.  The term includes the following:

 

        (a)  Swimming and other recreation in and on the water, meaning the surface water is suitable for swimming, wading, boating of all types, fishing, surfing, and similar activities;

 

        (b)  Fish consumption, meaning the surface water can support a population of fish free from toxicants and pathogens that could pose a human health risk to consumers;

 

        (c)  Shellfish consumption, meaning the tidal surface water can support a population of shellfish free from toxicants and pathogens that could pose a human health risk to consumers;

 

        (d)  Aquatic life integrity, meaning the surface water can support aquatic life, including a balanced, integrated, and adaptive community of organisms having a species composition, diversity, and functional organization comparable to that of similar natural habitats of the region;

 

        (e)  Wildlife, meaning the surface water can provide habitat capable of supporting any life stage or activity of undomesticated fauna on a regular or periodic basis; and

 

        (f)  Potential drinking water supply, meaning the surface water could be suitable for human intake and meet state and federal drinking water requirements after adequate treatment.

 

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        Env-Wq 1702.18  Discharge” means:

 

        (a)  The addition, introduction, leaking, spilling, or emitting of a pollutant to surface waters, either directly or indirectly through the groundwater, whether done intentionally, unintentionally, negligently or otherwise; or

 

        (b)  The placing of a pollutant in a location where the pollutant is likely to enter surface waters.

 

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        Env-Wq 1702.19  “Dissolved oxygen” means the oxygen dissolved as a gas in sewage, water or other liquid expressed in milligrams per liter (mg/l), parts per million (ppm), or percent saturation.

 

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        Env-Wq 1702.20  “Effluent limitation(s)” means any restriction(s) imposed by the department pursuant to RSA 485-A on quantities, discharge rates, characteristics, or concentrations of pollutants, or any combination thereof, that are allowed to be discharged to surface waters.

 

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        Env-Wq 1702.21  Epilimnion” means the upper, well-circulated warm layer of a thermally stratified lake, pond, impoundment or reservoir.

 

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        Env-Wq 1702.22  Existing uses” means those uses, other than assimilation or waste transport, that actually occurred in the waterbody on or after November 28, 1975, whether or not they are included in the water quality standards.

 

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        Env-Wq 1702.23  “High quality waters” means any surface water whose water quality is better than required by any aquatic life and/or human health water quality criteria contained in these rules or other criteria assigned to the surface water, or whose qualities and characteristics make the surface water critical to the propagation or survival of important living natural resources.

 

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        Env-Wq 1702.24  Industrial waste” means “industrial waste” as defined in RSA 485-A:2, VI, as reprinted in Appendix C.

 

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        Env-Wq 1702.25  Maintain and protect” means to preserve the existing and designated uses of surface waters.

 

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        Env-Wq 1702.26  Mixing zone” means a defined area or volume of the surface water surrounding or adjacent to a wastewater discharge where the surface water, as a result of the discharge, might not meet all applicable water quality standards.

 

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        Env-Wq 1702.27  Most sensitive use” means the use that is most susceptible to degradation by a specific pollutant, combination of pollutants, or activity, such as drinking, swimming, boating, fish and aquatic life propagation, fish consumption by higher level consumers including man, or irrigation.

 

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        Env-Wq 1702.28  Naturally-occurring conditions” means conditions that exist in the absence of human influences.

 

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        Env-Wq 1702.29  Nephelometric turbidity unit (NTU)” means a standard used to measure the optical property that causes light to be scattered and absorbed rather than transmitted in straight lines through water, as measured by a nephelometer.

 

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        Env-Wq 1702.30  Noncontact cooling water” means water used for cooling that does not come into direct contact with any raw material, intermediate product, waste product or finished product and to which no pollutants, other than heat, have been added.

 

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        Env-Wq 1702.31  Nonpoint source” means any source other than a point Source.

 

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        Env-Wq 1702.32  No observed effect concentration (NOEC)” means the highest measured continuous concentration, in percent, of an effluent at which no adverse effects are observed on the aquatic test organisms.

 

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        Env-Wq 1702.33  Nuisance species” means any species of flora or fauna living in or near the water whose noxious characteristics or presence in sufficient number or mass prevent or interfere with a designated use of those surface waters.

 

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        Env-Wq 1702.34  Other wastes” means “other wastes” as defined in RSA 485-A:2, VIII, as reprinted in Appendix C.

 

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        Env-Wq 1702.35  Outstanding resource water (ORW)” means surface waters of exceptional recreational or ecological significance.

 

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        Env-Wq 1702.36  pH” means a measure of the hydrogen ion concentration in a solution, expressed as the logarithm to the base 10, of the reciprocal of the hydrogen ion concentration in gram moles per liter.

 

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        Env-Wq 1702.37  Point source” means a discernible, confined, and discrete conveyance from which pollutants are or might be discharged, excluding return flows from irrigated agriculture or agricultural stormwater runoff.  The term includes, but is not limited to, a pipe, ditch, channel, tunnel, conduit, well, discrete fissure, container, rolling stock, concentrated animal feeding operation, or vessel or other floating craft.

 

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        Env-Wq 1702.38  Pollutant” means “pollutant” as defined in 40 CFR 122.2, as reprinted in Appendix D.

 

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        Env-Wq 1702.39  Pollution” means the man-made or man-induced alteration of the chemical, physical, biological, or radiological integrity of water.

 

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        Env-Wq 1702.40  Population” means a group of individuals of one biological species co-occurring in time and space.

 

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        Env-Wq 1702.41  Publicly owned treatment works (POTW)” means any device or system used in the treatment of municipal sewage and/or industrial wastewater that is owned by the state or a political subdivision of the state.

 

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        Env-Wq 1702.42  Radionuclide” means a radioactive atomic nucleus specified by its atomic number, atomic mass and energy state.

 

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        Env-Wq 1702.43  Sewage” means “sewage” as defined in RSA 485-A:2, X, as reprinted in Appendix C.

 

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        Env-Wq 1702.44  “Surface waters” means “surface waters of the state” as defined in RSA 485-A:2, XIV, as reprinted in Appendix C, and waters of the United States as defined in 40 CFR 122.2.

 

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        Env-Wq 1702.45  Tainting substance” means any material that can impart objectionable taste, odor, or color to the flesh of fish or other edible aquatic organisms.

 

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        Env-Wq 1702.46  Tidal waters” means those portions of the Atlantic Ocean within the jurisdiction of the state, and all other surface waters subject to the rise and fall of the tide.

 

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        Env-Wq 1702.47  “Toxicity test” means a test to determine the toxicity of a chemical or an effluent that involves exposing test organisms in a laboratory setting to one or more concentrations of the chemical or dilutions of the effluent in accordance with standard laboratory procedures.

 

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        Env-Wq 1702.48  “Toxic unit chronic (TUc)” means the reciprocal of the effluent dilution that causes no unacceptable effect to the test organisms by the end of the chronic exposure period, which can be calculated by dividing 100 by the chronic NOEC value.

 

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        Env-Wq 1702.49  “Waste” means “waste” as defined in RSA 485-A:2, XVI, as reprinted in Appendix C.

 

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        Env-Wq 1702.50  Water quality standards” means the combination of designated uses of surface waters, and the water quality criteria for such surface waters based upon such uses.

 

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        Env-Wq 1702.51  Wetland” means “wetland” as defined in RSA 482-A:2, X, as reprinted in Appendix C.  Wetlands include, but are not limited to, swamps, marshes, bogs and similar areas as delineated in accordance with Env-Wt 100 et seq.

 

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        Env-Wq 1702.52  Zone of passage” means an area bordering a mixing zone that is free from pollutants and allows for unobstructed movement of aquatic organisms.

 

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PART Env-Wq 1703  WATER QUALITY STANDARDS

 

        Env-Wq 1703.01  Water Use Classifications; Designated Uses.

 

        (a)  All surface waters shall be classified as provided in RSA 485-A:8, based on the standards established therein for class A and class B waters.  Each classification shall identify the most sensitive use it is intended to protect.

 

        (b)  All surface waters shall be restored to meet the water quality criteria for their designated classification including existing and designated uses, and to maintain the chemical, physical, and biological integrity of surface waters.

 

        (c)  All surface waters shall provide, wherever attainable, for the protection and propagation of fish, shellfish and wildlife, and for recreation in and on the surface waters.

 

        (d)  Unless high or low flows are caused by naturally-occurring conditions, surface water quantity shall be maintained at levels that protect existing uses and designated uses.

 

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        Env-Wq 1703.02  Wetlands Criteria.

 

        (a)  Subject to (b), below, wetlands shall be subject to the criteria listed in this part.

 

        (b)  Wherever the naturally-occurring conditions of the wetlands are different from the criteria listed in these rules, the naturally-occurring conditions shall be the applicable water quality criteria.

 

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        Env-Wq 1703.03  General Water Quality Criteria.

 

        (a)  The presence of pollutants in the surface waters shall not justify further introduction of pollutants from point or nonpoint sources, alone or in any combination.

 

        (b)  Once classified, state surface waters shall retain their legislated classification until such time as they are reclassified in accordance with RSA 485-A:10, even if they fail to meet any or all of the general, class-specific, or toxic criteria contained in this part.

 

        (c)  Unless otherwise specifically allowed by a statute, rule, order, or permit, the following physical, chemical, and biological criteria shall apply to all surface waters:

 

(1)  All surface waters shall be free from substances in kind or quantity that:

 

a.  Settle to form harmful benthic deposits;

 

b.  Float as foam, debris, scum or other visible substances;

 

c.  Produce odor, color, taste or turbidity that is not naturally occurring and would render the surface water unsuitable for its designated uses;

 

d.  Result in the dominance of nuisance species; or

 

e.  Interfere with recreational activities;

 

(2)  The level of radioactive materials in all surface waters shall not be in concentrations or combinations that would:

 

a.  Be harmful to human, animal or aquatic life or the most sensitive designated use;

 

b.  Result in radionuclides in aquatic life exceeding the recommended limits for consumption by humans; or

 

c.  Exceed limits specified in EPA’s national drinking water regulations or subtitle Env-Dw, whichever are more stringent; and

 

(3)  Tainting substances shall not be present in concentrations that individually or in combination are detectable by taste and odor tests performed on the edible portions of aquatic organisms.

 

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        Env-Wq 1703.04  Class-Specific Criteria.

 

        (a)  In addition to the general water quality criteria specified in Env-Wq 1703.03, the class-specific criteria specified in Env-Wq 1703.05 through Env-Wq 1703.33 shall apply to all surface waters unless otherwise specifically allowed by a statute, rule, order, or permit.

 

        (b)  The surface waters in each classification shall satisfy all criteria applicable to the lower classification(s).

 

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        Env-Wq 1703.05  Combined Sewer Overflows.

 

        (a)  An applicant for a surface water discharge permit under RSA 485-A:13 who asserts that class B criteria cannot reasonably be met at all times in the receiving water due to combined sewer overflows shall conduct a use attainability analysis (UAA) in accordance with 40 CFR § 131.10 and submit the UAA to the department.

 

        (b)  If, after public notice and comment, the department determines, based on the UAA and any public comments received, that the UAA supports the establishment of less stringent criteria, the department shall recommend a change in the classification of the waterbody to the legislature.

 

        (c)  Exceedances of class B criteria and uses due to combined sewer overflows shall be limited to those identified in the long-term combined sewer overflow plan developed in accordance with “EPA Combined Sewer Overflow (CSO) Control Policy”, EPA 830-B-94-001, dated April, 1994, available as noted in Appendix B, after full implementation of the control measures.

 

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        Env-Wq 1703.06  Bacteria.

 

        (a)  Uses and criteria associated with bacteria shall be as set forth in RSA 485-A:8, I, II, and V, as summarized in Appendix E.

 

        (b)  Subject to (c), below, the bacteria criteria shall be applied at the end of a wastewater treatment facility’s discharge pipe.

 

        (c)  For any combined sewer overflow that discharges into non-tidal surface waters, a bacteria criteria of 1,000 Escherichia coli per 100 milliliters shall apply at the end of the combined sewer overflow’s discharge pipe.

 

Source.  (See Revision Notes #1, #2, and #3 at chapter heading for Env-Wq 1700) #12042, eff 12-1-16

 

        Env-Wq 1703.07  Dissolved Oxygen.

 

        (a)  Class A waters shall have a dissolved oxygen content of at least 75% saturation, based on a daily average, and an instantaneous minimum of at least 6 mg/l at any place or time except as naturally occurs.

 

        (b)  Except as naturally occurs and subject to (c) and (e), below, class B waters shall have a dissolved oxygen content of:

 

(1)  At least 75% of saturation, as specified in RSA 485-A:8, II, based on a daily average; and

 

(2)  An instantaneous minimum dissolved oxygen concentration of at least 5 mg/l.

 

        (c)  In areas identified by the New Hampshire fish and game department (NHF&G) as cold water fish spawning areas of species whose early life stages are buried in the gravel on the bed of the surface water, the 7 day mean dissolved oxygen concentration shall be at least 9.5 mg/l and the instantaneous minimum dissolved oxygen concentration shall be at least 8 mg/l for the period from October 1 of one year to May 14 of the next year, provided that the time period shall be extended to June 30 for a specific discharge to a specific waterbody if modeling done in consultation with the NHF&G determines the extended period is necessary to protect spring spawners or late hatches of fall spawners, or both.

 

        (d)  Unless naturally occurring or subject to (a), above, surface waters within the top 25 percent of depth of thermally unstratified lakes, ponds, impoundments, and reservoirs or within the epilimnion shall contain a dissolved oxygen content of at least 75 percent saturation, based on a daily average and an instantaneous minimum dissolved oxygen content of at least 5 mg/l. Unless naturally occurring, the dissolved oxygen content below those depths shall be consistent with that necessary to maintain and protect existing and designated uses.

 

        (e)  As specified in RSA 485-A:8, III, waters in a temporary partial use area established under RSA 485-A:8, II as a surface water that is receiving a combined sewer overflow discharge shall contain not less than 5 parts per million of dissolved oxygen for the duration of the discharge and up to 3 days following cessation of the discharge.

 

Source.  (See Revision Notes #1, #2, and #3 at chapter heading for Env-Wq 1700) #12042, eff 12-1-16

 

        Env-Wq 1703.08  Benthic Deposits.

 

        (a)  Class A waters shall contain no benthic deposits, unless naturally occurring.

 

        (b)  Class B waters shall contain no benthic deposits that have a detrimental impact on the benthic community, unless naturally occurring.

 

Source.  (See Revision Notes #1, #2, and #3 at chapter heading for Env-Wq 1700) #12042, eff 12-1-16

 

        Env-Wq 1703.09  Oil and Grease.

 

        (a)  Class A waters shall contain no oil or grease, unless naturally occurring.

 

        (b)  Class B waters shall contain no oil or grease in such concentrations that would impair any existing or designated uses.

 

Source.  (See Revision Notes #1, #2, and #3 at chapter heading for Env-Wq 1700) #12042, eff 12-1-16

 

        Env-Wq 1703.10  Color.

 

        (a)  Class A waters shall contain no color, unless naturally occurring.

 

        (b)  Class B waters shall contain no color in such concentrations that would impair any existing or designated uses, unless naturally occurring.

 

Source.  (See Revision Notes #1, #2, and #3 at chapter heading for Env-Wq 1700) #12042, eff 12-1-16

 

        Env-Wq 1703.11  Turbidity.

 

        (a)  Class A waters shall contain no turbidity, unless naturally occurring.

 

        (b)  Class B waters shall not exceed naturally occurring conditions by more than 10 NTUs.

 

        (c)  Turbidity in waters identified in RSA 485-A:8, III shall comply with the applicable long-term combined sewer overflow plan prepared in accordance with Env-Wq 1703.05(c).

 

        (d)  For purposes of state enforcement actions, if a discharge causes or contributes to an increase in turbidity of 10 NTUs or more above the turbidity of the receiving water upstream of the discharge or otherwise outside of the visible discharge, a violation of the turbidity standard shall be deemed to have occurred.

 

Source.  (See Revision Notes #1, #2, and #3 at chapter heading for Env-Wq 1700) #12042, eff 12-1-16

 

        Env-Wq 1703.12  Slicks, Odors, and Surface Floating Solids.

 

        (a)  Class A waters shall contain no slicks, odors, or surface floating solids unless naturally occurring.

 

        (b)  Class B waters shall contain no slicks, odors, or surface floating solids that would impair any existing or designated use, unless naturally occurring.

 

        (c)  Slicks, odors, and surface floating solids in waters in temporary partial use areas shall comply with the applicable long-term combined sewer overflow plan prepared in accordance with Env-Wq 1703.05(c).

 

Source.  (See Revision Notes #1, #2, and #3 at chapter heading for Env-Wq 1700) #12042, eff 12-1-16

 

        Env-Wq 1703.13  Temperature.

 

        (a)  There shall be no change in temperature in class A waters, unless naturally occurring.

 

        (b)  Temperature in class B waters shall be as specified in RSA 485-A:8, II and VIII.

 

Source.  (See Revision Notes #1, #2, and #3 at chapter heading for Env-Wq 1700) #12042, eff 12-1-16

 

        Env-Wq 1703.14  Nutrients.

 

        (a)  Class A waters shall contain no phosphorus or nitrogen unless naturally occurring.

 

        (b)  Class B waters shall contain no phosphorus or nitrogen in such concentrations that would impair any existing or designated uses, unless naturally occurring.

 

        (c)  Existing discharges containing phosphorus or nitrogen, or both, which encourage cultural eutrophication shall be treated to remove the nutrient(s) to ensure attainment and maintenance of water quality standards.

 

        (d)  There shall be no new or increased discharge of phosphorus into lakes or ponds.

 

        (e)  There shall be no new or increased discharge containing phosphorus or nitrogen to tributaries of lakes or ponds that would contribute to cultural eutrophication or growth of weeds or algae in such lakes and ponds.

 

Source.  (See Revision Notes #1, #2, and #3 at chapter heading for Env-Wq 1700) #12042, eff 12-1-16

 

        Env-Wq 1703.15  Gross Beta Radioactivity.  Class A and B waters shall not contain gross beta radioactivity in excess of 1,000 picocuries per liter.

 

Source.  (See Revision Notes #1, #2, and #3 at chapter heading for Env-Wq 1700) #12042, eff 12-1-16

 

        Env-Wq 1703.16  Strontium-90.  Class A and B waters shall not contain strontium-90 in excess of 10 picocuries per liter.

 

Source.  (See Revision Notes #1, #2, and #3 at chapter heading for Env-Wq 1700) #12042, eff 12-1-16

 

        Env-Wq 1703.17  Radium-226.  Class A and B waters shall contain no radium-226 in excess of 3 picocuries per liter.

 

Source.  (See Revision Notes #1, #2, and #3 at chapter heading for Env-Wq 1700) #12042, eff 12-1-16

 

        Env-Wq 1703.18  pH.

 

        (a)  The pH of class A waters shall be as naturally occurs.

 

        (b)  As specified in RSA 485-A:8, II, the pH of class B waters shall be 6.5 to 8.0 unless due to natural causes.

 

        (c)  As specified in RSA 485-A:8, III, the pH of waters in temporary partial use areas shall be 6.0 to 9.0 unless due to natural causes.

 

Source.  (See Revision Notes #1, #2, and #3 at chapter heading for Env-Wq 1700) #12042, eff 12-1-16

 

        Env-Wq 1703.19  Biological and Aquatic Community Integrity.

 

        (a)  All surface waters shall support and maintain a balanced, integrated, and adaptive community of organisms having a species composition, diversity, and functional organization comparable to that of similar natural habitats of a region.

 

        (b)  Differences from naturally-occurring conditions shall be limited to non-detrimental differences in community structure and function.

 

Source.  (See Revision Notes #1, #2, and #3 at chapter heading for Env-Wq 1700) #12042, eff 12-1-16

 

        Env-Wq 1703.20  Risk Factors for Human Health Criteria.

 

        (a)  The department shall use a risk factor of one in 1,000,000 when determining human health criteria for all new discharges. 

 

        (b)  The department shall use a one in 1,000,000 risk factor when determining human health criteria for any modification to a permit for an existing discharge unless the applicant for a water discharge permit can demonstrate that the criteria obtained using the one in 1,000,000 risk factor cannot be achieved because it is either technologically impossible or economically unfeasible.

 

        (c)  When establishing an alternative risk factor under (b), above, the department shall not allow a risk factor greater than one in 100,000.

 

Source.  (See Revision Notes #1, #2, and #3 at chapter heading for Env-Wq 1700) #12042, eff 12-1-16

 

        Env-Wq 1703.21  Water Quality Criteria for Toxic Substances.

 

        (a)  Unless naturally occurring or allowed under Env-Wq 1707, all surface waters shall be free from toxic substances or chemical constituents in concentrations or combinations that:

 

(1)  Injure or are inimical to plants, animals, humans or aquatic life; or

 

(2)  Persist in the environment or accumulate in aquatic organisms to levels that result in harmful concentrations in:

 

a.  Edible portions of fish, shellfish, other aquatic life, or

 

b.  Wildlife that might consume aquatic life.

 

        (b)  Unless allowed under Env-Wq 1707 or naturally occurring, concentrations of toxic substances in all surface waters shall not exceed the recommended safe exposure levels of the most sensitive surface water use shown in Table 1703-1, subject to the notes in Env-Wq 1703.22, as follows:

 

Table 1703-1: Water Quality Criteria For Toxic Substances

 

CAS Number

Chemical Name

Protection of Aquatic Life

Concentration in micrograms per liter (μg/l)

Protection of Human Health

Units per Liter

Fresh

Acute

Criteria

Fresh

Chronic

Criteria

Marine

Acute

Criteria

Marine

Chronic

Criteria

Water

& Fish

Ingestion

Fish

Consumption

Only

83329

Acenaphthene

1,700

520

970

710

20 μg j

20 μg j

107028

Acrolein

3

3

55

--

6 μg

400 μg

107131

Acrylonitrile

7,550

2,600

--

--

0.061 μg c

7 μg c

309002

Aldrin

3.0 k

--

1.3 k

--

0.049 ng c

0.05 ng c

N/A

Alkalinity

--

20,000 u

--

--

--

--

7429905

Aluminum

750 s

87 s

--

--

--

--

7664417

Ammonia a

Note a

Note a

Note a

Note a

--

--

62533

Aniline

28

14

77

37

--

--

120127

Anthracene

(see Polynuclear Aromatic Hydrocarbons)

8,300 μg

40,000 μg

7440360

Antimony

9,000

1,600

--

--

5.6 μg

640 μg

7440382

Arsenic

340 d, i

150 d, i

69 d, i

36 d, i

18 ng b, c

140 ng b, c

1332214

Asbestos

--

--

--

--

7,000,000 fibres c

--

7440393

Barium

--

--

--

--

1.0 mg

--

71432

Benzene

5,300

--

5,100

700

2.2 μg c

58 μg c

92875

Benzidine

2,500

--

--

--

0.14 ng c

11 ng c

56553

Benzo(a) Anthracene

(see Polynuclear Aromatic Hydrocarbons)

0.0038 μg c

0.018 μg c

50328

Benzo(a) Pyrene

(see Polynuclear Aromatic Hydrocarbons)

0.0038 μg c

0.018 μg c

205992

Benzo(b) Fluoranthene

(see Polynuclear Aromatic Hydrocarbons)

0.0038 μg c

0.018 μg c

192972

Benzo(e) Pyrene

(see Polynuclear Aromatic Hydrocarbons)

--

--

191242

Benzo(g,h,i) Perylene

(see Polynuclear Aromatic Hydrocarbons)

--

--

205823

Benzo(j) Fluoranthene

(see Polynuclear Aromatic Hydrocarbons)

--

--

207089

Benzo(k) Fluoranthene

(see Polynuclear Aromatic Hydrocarbons)

0.012 μg c

0.018 μg c

7440417

Beryllium

130

5.3

--

--

Note 1

--

N/A

BHC

(Hexachloro-cyclohexane)

100 e

--

0.34 e

--

(see individual compounds)

319846

alpha-BHC

(see BHC)

2.6 ng c

4.9 ng c

319857

beta-BHC

(see BHC)

9.1 ng c

17 ng c

319868

delta-BHC

(see BHC)

0.0123 μg

0.0414 μg

58899

gamma-BHC (Lindane)

0.95

0.08

0.16 k

--

4.2 μg l

4.4 μg

608731

technical-BHC

(see Hexachlorocyclo-hexane-(Technical))

(see Hexachlorocyclo-hexane-(Technical))

111911

Bis (2-Chloroethoxy) methane

(see Chloroalkyl ethers)

--

--

111444

Bis (2-Chloroethyl) Ether

(see Chloroalkyl ethers)

0.03 μg c

2.2 μg c

108601

Bis (2-Chloroiso- propyl) ether

(see Chloroalkyl ethers)

1,400 μg

65,000 μg

117817

Bis (2-Ethylhexy)Phthalate

(see Phthalate esters)

1.2 μg c

2.2 μg c

75252

Bromoform

(see Halomethanes)

7 μg c

140 μg c

101553

4-Bromophenyl phenyl ether

(see Haloethers)

--

--

85687

Butyl benzyl phthalate

(see Phthalate esters)

1,500 μg

1,900 μg

7440439

Cadmium i

0.39 f, d

0.21 f, d

33  d

7.9 d

Note 1

--

63252

Carbaryl

2.1

2.1

1.6

--

--

--

56235

Carbon Tetrachloride

35,200

--

50,000

--

0.4 μg c

5 μg c

57749

Chlordane

2.4 k

0.0043 k

0.09 k

0.004 k

0.8 ng c

0.81 ng c

N/A

Chlorinated benzenes

250 e

50 e

160 e

129 e

(see individual compounds)

108907

Chlorobenzene

(See Chlorinated benzenes)

20 μg j

20 μg j

16887006

Chlorides

860,000

230,000

--

--

--

--

70776033

Chlorinated napthalenes

1,600e

--

7.5e

--

(see individual compounds)

7782505

Chlorine

19

11

13

7.5

Note 1

--

N/A

Chloroalkyl ethers

238,000e

--

--

--

(see individual compounds)

111444

Chloroethyl ether (Bis-2)

see Bis (2-Chloroethyl) Ether

see Bis (2-Chloroethyl) Ether

110758

Chloroethyl vinyl ether-2

(see Chloroalkyl ethers)

--

--

124481

Chlorodibromomethane

(see Halomethanes)

0.8 μg c

21 μg c

111911

Chloroethoxy methane

(Bis-2)

(see Bis (2-Chloroethoxy) methane)

(see Bis (2-Chloroethoxy) methane)

67663

Chloroform

28,900

1,240

(see Halomethanes)

60 μg c

2,000 μg c

108601

Chloroisopropyl ether

(Bis-2)

see Bis (2-Chloroisopropyl) ether

see Bis (2-Chloroisopropyl) ether

59507

p-Chloro-m-cresol

(see 3-Methyl-4-chlorophenol)

(see 3-Methyl-4-chlorophenol)

542881

Chloromethyl ether (Bis)

(see Chloroalkyl ethers)

0.15 ng c

0.17 ng c

91587

Chloronaphthalene 2

(see Chlorinated naphthalenes)

1,000 μg

1,600 μg

95578

Chlorophenol 2

4,380

2,000

--

--

0.1 μg j

0.1 μg j

108430

Chlorophenol 3

--

--

--

--

0.1 μg j

0.1 μg j

106489

Chlorophenol 4

--

--

29,700

--

0.1 μg j

0.1 μg j

93721

Chlorophenoxy herbicides (2,4,5-TP)

--

--

--

--

100 μg l

--

94757

Chlorophenoxy herbicides (2,4-D)

--

--

--

--

1,300 μg l

--

7005723

Chlorophenyl phenyl ether 4

(see Haloethers)

--

--

2921882

Chlorpyrifos

0.083

0.041

0.011

0.0056

--

--

59507

Chloro-4 Methyl-3 Phenol

(see 3-Methyl-4-chlorophenol)

(see 3-Methyl-4-chlorophenol)

18540299

Chromium+6

16 d, i

11 d, i

1,100 d, i

50 d, i

note l

--

16065831

Chromium+3

152 f, d, i

19.8 f, d ,i

10,300

--

note l

--

218019

Chrysene

(see Polynuclear Aromatic Hydrocarbons)

0.12 μg c

0.13 μg c

7440508

Copper i

2.9 f, d

2.3 f, d

4.8 d

3.1 d

1,000 μg j

1,000 μg j

57125

Cyanide

22m

5.2m

1.0m

1.0m

140 μg q

140 μg q

72559

DDE(4,4')

1,050

--

14

--

0.22 ng c

0.22 ng c

72548

DDD(4,4')

0.6

--

3.6

--

0.31 ng c

0.31 ng c

50293

DDT(4,4')

1.1k, t

0.001k, t

0.13k, t

0.001k, t

0.22 ng c

0.22 ng c

8065483

Demeton

--

0.1

--

0.1

--

--

333415

Diazinon

0.17

0.17

0.82

0.82

--

--

53703

Dibenzo(a,h)Anthracene

(see Polynuclear Aromatic Hydrocarbons)

0.0038 μg c

0.018 μg c

84742

Dibutyl Phthalate

(see Di-n-butyl Phthalate)

(see Di-n-butyl Phthalate)

N/A

Dichlorobenzenes

1,120e

763e

1,970e

--

(see individual compounds)

95501

Dichlorobenzene(1,2)

(see Dichlorobenzenes)

1,000 μg l

3,000 μg

541731

Dichlorobenzene(1,3)

(see Dichlorobenzenes)

320 μg

960 μg

106467

Dichlorobenzene(1,4)

(see Dichlorobenzenes)

300 μg l

900 μg

91941

Dichlorobenzidine(3,3')

--

--

--

--

0.049 μgc

0.15 μg c

75274

Dichlorobromomethane

(see Halomethanes)

0.95 μg c

27 μg c

75718

Dichlorodifluoromethane

(see Halomethanes)

6.9 mg c

570 mg c

107062

Dichloroethane(1,2)

118,000

20,000

113,000

--

9.9 μg c

650 μg c

25323302

Dichloroethylenes

11,600 e

--

224,000 e

--

(see individual compounds)

75354

Dichloroethylene(1,1)

(see Dichloroethylenes)

330 μg l

20,000 μg

156605

Dichloroethylene

(1,2-Trans)

(see Dichloroethylenes)

140 μg l

10,000 μg

576249

Dichlorophenol(2,3)

--

--

--

--

0.04 μg j

0.04 μg j

120832

Dichlorophenol(2,4)

2,020

365

--

--

0.3 μg j

0.3 μg j

583788

Dichlorophenol(2,5)

--

--

--

--

0.5 μg j

0.5 μg j

87650

Dichlorophenol(2,6)

--

--

--

--

0.2 μg j

0.2 μg j

95772

Dichlorophenol(3,4)

--

--

--

--

0.3 μg j

0.3 μg j

26638197

Dichloropropanes

23,000 e

5,700 e

10,300 e

3,040 e

(see individual compounds)

78875

Dichloropropane(1,2)

(see Dichloropropanes)

0.9 μg c

31 μg c

26952238

Dichloropropenes

6,060 e

244 e

790 e

--

(see individual compounds)

542756

Dichloropropene(1,3)

(see Dichloropropenes)

0.34 μg c

21 μg c

60571

Dieldrin

0.24

0.056

0.71k

0.0019k

0.052 ng c

0.054 ng c

84662

Diethyl Phthalate

--

--

--

--

17 mg

44 mg

105679

Dimethyl Phenol(2,4)

1,300

530

270

110

380 μg

400 μg j

131113

Dimethyl Phthalate

(see Phthalate esters)

270 mg

1.1 g

84742

Di-n-butyl Phthalate

(see Phthalate esters)

2 mg

4.5 mg

N/A

Dinitrotoluenes

330 e

230 e

590 e

370 e

(see individual compounds)

121142

Dinitrotoluene(2,4)

(see Dinitrotoluenes)

0.11 μg c

3.4 μg c

606202

Dinitrotoluene(2,6)

(see Dinitrotoluenes)

--

--

N/A

Dinitro-o-cresol (2,4)

(see Nitrophenols)

13.4 μg

765 μg

534521

Dinitro-o-cresol (4,6)

(see 2 Methyl-4,6-Dinitrophenol)

(see 2 Methyl-4,6-Dinitrophenol)

25550587

Dinitrophenols

(see Nitrophenols)

69 μg

5,300 μg

51285

Dinitrophenol(2,4)

(see Nitrophenols)

69 μg

5,300 μg

117840

Di-n-octyl phthalate

(see Phthalate esters)

--

--

1746016

2,3,7,8-TCDD (Dioxin)

--

--

--

--

0.000005 ng c

0.0000051 ng c

122667

Diphenylhydrazine(1,2)

270

--

--

--

0.036 μg c

0.2 μg c

117817

Di-2-ethylhexyl phthalate

(see Bis (2-Ethylhexy)Phthalate

(see Bis (2-Ethylhexy)Phthalate

959988

alpha-Endosulfan

0.22 k, r

0.056 k, r

0.034 k, r

0.0087 k, r

62 μg

89 μg

33213659

beta-Endosulfan

0.22 k, r

0.056 k, r

0.034 k, r

0.0087 k, r

62 μg

89 μg

1031078

Endosulfan Sulfate

--

--

--

--

62 μg

89 μg

72208

Endrin

0.086

0.036

0.037 k

0.0023 k

0.059 μg

0.06 μg

7421934

Endrin Aldehyde

--

--

--

--

1 μg

1 μg

100414

Ethylbenzene

32,000

--

430

--

530 μg

2,100 μg

206440

Fluoranthene

(see Polynuclear Aromatic Hydrocarbons)

130 μg

140 μg

86737

Fluorene

(see Polynuclear Aromatic Hydrocarbons)

1,100 μg

5,300 μg

86500

Guthion

--

0.01

--

0.01

--

--

N/A

Haloethers

360 e

122 e

--

--

(see individual compounds)

N/A

Halomethanes

11,000 e

--

12,000 e

6,400 e

(see individual compounds)

76448

Heptachlor

0.52 k

0.0038 k

0.053 k

0.0036 k

0.079 ng c

0.079 ng c

1024573

Heptachlor Epoxide

0.52 k

0.0038 k

0.053 k

0.0036 k

0.039 ng c

0.039 ng c

67721

Hexachloroethane

980

540

940

--

1.4 μg c

3.3 μg c

118741

Hexachlorobenzene

(see Chlorinated benzenes)

0.28 ng c

0.29 ng c

87683

Hexachlorobutadiene

90

9.3

32

--

0.44 μg c

18 μg c

608731

Hexachlorocyclo-hexane-(Technical)

(see BHC)

0.0123 μg

0.0414 μg

77474

Hexachlorocyclopentadiene

7.0

5.2

7.0

--

1.0 j

1.0 j

193395

Ideno(1,2,3-cd)Pyrene

(see Polynuclear Aromatic Hydrocarbons)

0.0038 μg c

0.018 μg c

7439896

Iron

--

1,000

--

--

0.3 mg j

--

78591

Isophorone

117,000

--

12,900

--

35 μg c

1,800 μg c

7439921

Lead i

10.5 f, d

0.41 f, d

210 d

8.1 d

--

--

121755

Malathion

--

0.1

--

0.1

--

--

7439965

Manganese

--

--

--

--

50 μg j

100 μg

7439976

Mercury

1.4 d, i

0.77 d, i

1.8 d, i

0.94 d, i

0.05 μg

0.051 μg

72435

Methoxychlor

--

0.03

--

0.03

100 μg l

--

74839

Methyl Bromide

(see Halomethanes)

100 μg

10,000 μg

74873

Methyl Chloride

(see Halomethanes)

--

--

75092

Methylene Chloride

(see Halomethanes)

20 μg c

1,000 μg c

22967926

Methylmercury

see Mercury

--

0.3 mg/kg g

534521

2 Methyl-4,6-Dinitrophenol

(see Nitrophenols)

13 μg

280 μg

1570645

2-Methyl-4-chlorophenol

--

--

--

--

1,800 μg j

1,800 μg j

59507

3-Methyl-4-chlorophenol

30

--

--

--

3,000 μg j

3,000 μg j

615747

3-Methyl-6-chlorophenol

--

--

--

--

20 μg j

20 μg j

2385855

Mirex

--

0.001

--

0.001

--

--

91203

Naphthalene

2,300

620

2,350

--

--

--

7440020

Nickel i

120.0 f, d

13.3 f, d

74 d

8.2 d

610 μg

4,600 μg

14797558

Nitrates

--

--

--

--

10 mg

--

98953

Nitrobenzene

27,000

--

6,680

--

17 μg

30 μgj

25154556

Nitrophenols

230 e

150 e

4,850 e

--

(see individual compounds)

88755

Nitrophenol 2

(see Nitrophenols)

--

--

100027

Nitrophenol 4

(see Nitrophenols)

--

--

N/A

Nitrosamines

5,850 e

--

3,300,000 e

--

0.8 ng

1.24 μg

924163

Nitrosodibutylamine N

(see Nitrosamines)

6.3 ng c

220 ng c

55185

Nitrosodiethylamine N

(see Nitrosamines)

0.8 ng c

1,240 ng c

62759

Nitrosodimethylamine N

(see Nitrosamines)

0.69 ng c

3 μg c

621647

Nitrosodi-n-propylamine N

(see Nitrosamines)

0.005 μg c

0.51 μg c

86306

Nitrosodiphenylamine N

(see Nitrosamines)

3.3 μg c

6 μg c

930552

Nitrosopyrrolidine N

(see Nitrosamines)

16 ng c

34,000 ng c

84852153

Nonylphenol

28

6.6

7

1.7

--

--

56382

Parathion

0.065

0.013

--

--

--

--

1336363

PCB

2.0 e, n

0.014  e, n

10.0 e, n

0.03 e, n

0.064 ng c, n

0.064 ng c, n

N/A

PCB-1242

(see PCB)

(see PCB)

(see PCB)

N/A

PCB-1254

(see PCB)

(see PCB)

(see PCB)

N/A

PCB-1221

(see PCB)

(see PCB)

(see PCB)

N/A

PCB-1248

(see PCB)

(see PCB)

(see PCB)

N/A

PCB-1260

(see PCB)

(see PCB)

(see PCB)

N/A

PCB-1016

(see PCB)

(see PCB)

(see PCB)

76017

Pentachloroethane

7,240

1,100

390

281

--

--

608935

Pentachlorobenzene

(see Chlorinated benzenes)

1.4 μg

1.5 μg

87865

Pentachlorophenol

5.28 h

4.05 h

13

7.9

0.27 μg c

3 μg c

85018

Phenanthrene

(see Polynuclear Aromatic Hydrocarbons)

--

--

108952

Phenol

10,200

2,560

5,800

--

300 μg j

300 μg j

N/A

Phthalate Esters

940 e

3 e

2,944 e

3.4 e

--

--

1336363

Polychlorinated Biphenyls

(see PCBs)

(see PCB)

(see PCB)

N/A

Polynuclear Aromatic Hydrocarbons

--

--

300 e

--

(see individual compounds)

129000

Pyrene

(see Polynuclear Aromatic Hydrocarbons)

830 μg

4,000 μg

7782492

Selenium

--

5

290d,i

71d,i

170 μg l

4,200 μg

7440224

Silver

0.20d,f, i

--

1.9d,i,k

--

105 μg p

65 mg p

7783064

Sulfide-Hydrogen Sulfide

--

2.0

--

2.0

--

--

95943

Tetrachlorobenzene 1,2,4,5

(see Chlorinated benzenes)

0.97 μg

1.1 μg

79345

Tetrachloroethane 1,1,2,2

(see Tetrachlor-oethanes)

2,400

9,020

--

0.2 μg c

4 μg c

25322207

Tetrachloroethanes

9,320 e

--

--

--

(see individual compounds)

127184

Tetrachloroethylene

5,280

840

10,200

450

10 μg c

29 μg c

935955

Tetrachlorophenol 2,3,5,6

--

--

440

--

--

--

58902

Tetrachlorophenol 2,3,4,6

--

--

--

--

1.0 μg j

1.0 μg j

7440280

Thallium

1,400

40

2,130

--

0.24 μg

0.47 μg

108883

Toluene

 17,500

--

6,300

 5,000

1.3 mgl

15 mg

8001352

Toxaphene

0.73

0.0002

0.21

0.0002

0.70 ng c

0.71 ng c

N/A

Tributyltin (TBT)

0.46

0.072

0.42

0.0074

--

--

N/A

Trichlorinated Ethanes

18,000 e

--

--

--

(see individual compounds)

120821

Trichlorbenzene 1,2,4

(see Chlorinated benzenes)

35 μg

70 μg

71556

Trichloroethane 1,1,1

--

--

31,200

--

Note 1

--

79005

Trichloroethane 1,1,2

--

9,400

--

--

0.59 μg c

16 μg c

79016

Trichloroethylene

45,000

21,900

2,000

--

2.5 μg c

30 μg c

75694

Trichlorofluoromethane

(see Halomethanes)

10 mg

860 mg

95954

Trichlorophenol 2,4,5

--

--

--

--

1.0 μg j

1.0 μg j

88062

Trichlorophenol 2,4,6

--

970

--

--

1.5 μg  c

2.0 μg c, j

75014

Vinyl Chloride

--

--

--

--

0.025 μg c

2.4 μg c

7440666

Zinc i

30.0 f, d

30.0 f, d

90d

81d

5,000 μg j

5,000 μg j

 

Source.  (See Revision Notes #1, #2, and #3 at chapter heading for Env-Wq 1700) #12042, eff 12-1-16

 

        Env-Wq 1703.22  Notes For Table 1703-1.  The following shall apply to Table 1703-1:

 

        (a)  The letter “a” shall indicate that the freshwater and saltwater aquatic life criteria for ammonia are shown in Env-Wq 1703.25 through Env-Wq 1703.32.

 

        (b)  The letter “b” shall indicate that the criteria refer to the inorganic form only.

 

        (c)  The letter “c” shall indicate that these criteria for the protection of human health are based on carcinogenicity using a risk factor of one in 1,000,000, while the human health criteria without this footnote are based on systemic toxicity.  Other risk factors shall be allowed only as specified in Env-Wq 1703.20.

 

        (d)  The letter “d” shall indicate that criteria for these metals are expressed as a function of the water effect ratio (WER) as defined in 40 CFR 131.36(c), and that because the values displayed in Table 1703-1 correspond to a WER of 1.0, metals criteria for different WERs shall be determined using the procedures described in the EPA publication “Interim Guidance on Determination and Use of Water-Effect Ratios for Metals”, EPA-823-B-94-001, dated February 1994, available as noted in Appendix B, provided that for copper, either of the following references, both available as noted in Appendix B, may be used:

 

(1)  The “Streamlined Water-Effect Ratio procedure for Discharges of Copper”, EPA-822-R-01-005, dated March 2001; or

 

(2)  The Biotic Ligand Model (freshwater only) as described in “Aquatic Life Ambient Freshwater Quality Criteria - Copper”, EPA-822-R-07-001, dated February 2007.

 

        (e)  The letter “e” shall indicate that the following classes of compounds have 2 or more isomers and the appropriate aquatic life criteria apply to the sum of the concentrations of each isomer:

 

(1)  BHC;

 

(2)  Chlorinated benzenes;

 

(3)  Chlorinated naphthalenes;

 

(4)  Chloroalkyl ethers;

 

(5)  Dichlorobenzenes;

 

(6)  Dichloroethylenes;

 

(7)  Dichloropropanes;

 

(8)  Dichloropropenes;

 

(9)  Dinitrotoluenes;

 

(10)  Haloethers;

 

(11)  Halomethanes;

 

(12)  Nitrophenols;

 

(13)  Nitrosamines;

 

(14)  PCB;

 

(15)  Phthalate esters;

 

(16)  Polynuclear aromatic hydrocarbons;

 

(17)  Tetrachloroethanes; and

 

(18)  Trichlorinatedethanes.

 

        (f)  The letter “f” shall indicate that the freshwater aquatic criteria for these metals are expressed as a function of the total hardness, as mg/l CaCO3 of the surface water, and that because the values displayed in Table 1703-1 correspond to a total hardness of 20 mg/l the aquatic life criteria for other hardness values expressed as calcium carbonate shall be calculated using the equations and tables in Env-Wq 1703.23 and Env-Wq 1703.24.

 

        (g)  The letter “g” shall indicate that if the methylmercury concentration in the edible portion of the aquatic species of concern exceeds 0.3 mg/kg, a risk assessment shall be conducted to determine whether a consumption advisory should be issued for the surface water.  If a consumption advisory is issued by the department, the surface water shall be considered in non-attainment of the fish and/or shellfish consumption designated uses and in violation of these surface water quality regulations.

 

        (h)  The letter “h” shall indicate that the freshwater aquatic life criteria for pentachlorophenol are expressed as a function of pH.  Values displayed in Table 1703-1 correspond to a pH value of 6.5.  For other pH values, the formulas shown in Env-Wq 1703.32 shall be used.

 

        (i)  The letter “i” shall indicate that the values presented for aquatic life protection are dissolved metals and for hardness-dependent metals are based on a hardness of 20 mg/L.  To convert dissolved to total recoverable metal, the equations and tables in Env-Wq 1703.23 shall be used.  To calculate dissolved or total recoverable fresh water criteria for hardness-dependent metals for hardness values other than 20 mg/l, the equations and tables shown in Env-Wq 1703.23 and Env-Wq 1703.24 shall be used.

 

        (j)  The letter “j” shall indicate that these human health criteria prevent taste and odor effects in the surface water and in fish and other aquatic life as prohibited in Env-Wq 1703.03(c)(1)c. and (3).

 

        (k)  The letter “k” shall indicate that these criteria are based on EPA’s 304(a) criteria in the 1980 documents listed below and were derived to be used as instantaneous maximum values, or to be applied after division by 2, to obtain a value comparable to an acute criterion derived using the 1985 Guidelines, when assessment is done using an averaging period:

 

(1)  Aldrin/Dieldrin, document number 440/5-80-019;

 

(2)  Chlordane, document number 440/5-80-027;

 

(3)  DDT, document number 440/5-80-038;

 

(4)  Endosulfan, document number 440/5-80-046;

 

(5)  Endrin, document number 440/5-80-047;

 

(6)  Heptachlor, document number 440/5-80-052;

 

(7)  Hexachlorocyclohexane, document number 440/5-80-054; or

 

(8)  Silver, document number 440/5-80-071.

 

        (l)  The letter “1” shall indicate that there is a more stringent drinking water maximum contaminant level (MCL) specified in Env-Dw 700, so if the surface water is a source for a public water system as defined in RSA 485:1-a, XV or is within 20 miles upstream of any active surface water intake for a public water system, the department shall use the MCL values shown in table 1703-2A, below, for the water and fish ingestion human health criteria:

 

 

Table 1703-2A: MCL Values for Water and Fish Ingestion Criteria

CAS Number

Chemical Name

MCL

(Units per Liter)

7440417

Beryllium

4 μg

7440439

Cadmium

5 μg

7782505

Chlorine (as Cl2)

4 mg

94757

Chlorophenoxy herbicides (2,4-D)

70 μg

93721

Chlorophenoxy herbicides (2,4,5-TP)

50 μg

18540299

Chromium+6

see Chromium Total

16065831

Chromium+3

see Chromium Total

7440473

Chromium Total (equal to the sum of Chromium+3 plus Chromium+6)

100 μg

95501

Dichlorobenzene (1,2)

600 μg

106467

Dichlorobenzene(1,4)

75 μg

107062

Dichloroethane (1,2)

5 μg

75354

Dichloroethylene(1,1)

7 μg

156605

Dichloroethylene(1,2-Trans)

100 μg

58899

gamma-BHC (Lindane)

0.2 μg

72435

Methoxychlor

40 μg

7782492

Selenium

50 μg

108883

Toluene

1 mg

71556

Trichloroethane 1,1,1

200 μg

 

        (m)  The letter “m” shall indicate that this criteria is expressed as micrograms of free cyanide per liter.

 

        (n)  The letter “n” shall indicate that this criteria applies to total PCBs or the sum of all of its congener or isomer or homolog or Arochlor analyses.

 

        (o)  The letter “o” shall indicate that the freshwater acute criteria for selenium shall be calculated using the values for the fraction f1 of selenite and f2 of selenate measured in the receiving water.  To calculate the acute criteria, in μg/l, the number 1 shall be divided by the sum of the fractions f1 divided by 185.9 and f2 divided by 12.83, as follows:

                                                                 1              

                Acute Criteria  =       (f1/185.9) + (f2/12.83)

 

        (p)  The letter “p” shall indicate that these human health criteria for silver shall be for the protection of humans from argyria.