Section 323.1205. Definitions; M to Z.

Rule 1205. As used in this part:

(a)    "Mass load" means a wasteload allocation specified in units of weight per time.

(b)        "Maximum acceptable toxicant concentration (MATC)" means the concentration obtained by calculating the geometric mean of the lower and upper chronic limits from a chronic test. A  lower  chronic  limit  is   the highest tested concentration that did not cause the occurrence of a specific adverse effect. An upper chronic limit is the lowest tested concentration which did cause the occurrence of a specific adverse effect and above which all tested concentrations caused such an occurrence.

(c)       "Minimum level" means the level at which the entire analytical system must give a recognizable signal and acceptable calibration point. It is equivalent to the concentration of the lowest calibration standards, assuming that all method-specified sample weights, volumes, and cleanup  procedures have been employed.

(d)    "Mixing zone" means the portion of a water body in which a point source discharge or venting groundwater is mixed with the receiving water.

(e)        "Monthly average water quality-based effluent limit (WQBEL)" means an effluent specific water quality-based effluent limit in a national pollutant discharge elimination system (NPDES) permit developed to protect aquatic life, human health, and wildlife from chronic chemical specific  toxicity or aquatic life from chronic whole effluent toxicity.

(f)     "National pollutant discharge elimination system (NPDES)"  means   a permit issued by the department to a discharger pursuant to sections 3106 and 3112 of 1994 PA 451, MCL 324.3106 and 324.3112.

(g)       "New discharge" means any building,  structure,  facility,   or installation from which there is or may be a discharge of toxic substances to the surface waters of the state, the construction of which  commenced  after July 29, 1997.

(h)     "Nonpoint source" means a source of a toxic substance to the surface waters of the state other than a source defined as a point source.

(i)     "Permittee" means the individual or facility that is issued an NPDES permit.

(j)     "Point source" means a discharge that is released to the surface waters of the state by a discernible, confined, and discrete conveyance, including any of the following from which wastewater is or may be discharged:

(i)     A pipe.

(ii)     A ditch.

(iii)     A channel.

(iv)     A tunnel.

(v)     A conduit.

(vi)     A well.

(vii)     A discrete fissure.

(viii)     A container.

(ix)     concentrated animal feeding operation.

(x)     ) A boat or other watercraft.

(k)     "Pollution prevention" means eliminating or  minimizing  the  initial generation of waste at the source or utilizing environmentally sound on-site and off-site reuse or recycling. Waste treatment, release,  or  disposal  is not considered pollution prevention.

(l)        "Quantification level" means the measurement of the concentration of a contaminant obtained by using a specified laboratory procedure calculated at a specified concentration above the detection level. It is considered the lowest concentration at which a particular contaminant can be quantitatively measured using a specified laboratory procedure for monitoring of the contaminant.

(m)     "Raw water" means the surface waters of the state before any treatment.

(n)     "Receiving water" means the surface waters of the state into which an effluent is or may be discharged.

(o)      "Same body of water" means that, for purposes of evaluating intake toxic substances consistent with R 323.1211, the department will consider intake toxic substances to be from the same body of water if the department finds that the intake toxic substance would have reached the vicinity of the outfall point in the receiving water within a reasonable period had it not been removed by the permittee and there is a direct hydrological connection between the intake and the discharge points. Notwithstanding the provisions of this subdivision, an intake toxic substance shall be considered to be from the same body of water if the permittee's intake point is located on a Great Lake and the outfall point is in close proximity to the intake point and is located on a tributary of that Great Lake. In this situation, the background concentration of the toxic substance in the receiving water shall be similar to or greater than that in the intake water and a difference in any water quality characteristic between the intake and receiving water shall not result in an adverse impact on the receiving water. Groundwater sources of intake water can also be considered the same body of water if  both  of  the following conditions are met:

(i)       The groundwater vents to the same  surface  water  body  where  the discharge is located.

(ii)      The concentration of the intake toxic substance in the groundwater source is similar to the background groundwater concentration which exists at or regionally proximate to the groundwater source that is not attributable to any release at or regionally proximate to the source. Release shall be defined consistent with the September, 1996, revisions to section 324.20101 of 1994 PA 451, MCL 324.20101. Where a  release  has  influenced   the concentration of the toxic substance in the groundwater source, a same body of water determination shall be made by the department on a case-by-case basis. For purposes of this paragraph, the background groundwater concentration of the intake toxic substance shall be established at the time of permit issuance, reissuance, or modification based on data available to the department or data provided  by the  permittee from  at   least   1 representative location.

(p)      "Surface waters of the state" means all of the following, but does not include drainage ways  and ponds  used  solely for  wastewater  conveyance, treatment, or control:

(i)     The Great Lakes and their connecting waters.

(ii)     All inland lakes.

(iii)     Rivers.

(iv)     Streams.

(v)     Impoundments.

(vi)     Open drains.

(vii)     Wetlands.

(viii)     Other surface bodies of water within the confines of the state.

(q)      "Tier I value" means a value for aquatic life, human health, or wildlife calculated under R 323.1057 using a tier I toxicity data base.

(r)      "Tier II value" means a value for aquatic life or human health calculated under R 323.1057 using a tier II toxicity data base.

(s)          "Toxicity equivalency factor (TEF)" means a reasonable estimate of the toxicity associated with a mixture of chlorinated dibenzo-p-dioxins and chlorinated dibenzo-p-furans relative    to     the     toxicity    of 2,3,7,8-tetrachlorodibenzo-p-dioxin.

(t)       "Toxicity reduction evaluation (TRE)" means a site-specific study conducted in a stepwise process designed to identify the causative agents of effluent toxicity, isolate the sources of toxicity, evaluate the effectiveness of toxicity control options, and then confirm the reduction  in effluent toxicity.

(u)       "Toxic substance" means a substance, except for heat, that is present in a sufficient concentration or quantity that is or may become harmful to plant life, animal life, or designated uses.  These rules apply to all of the following toxic substances:

(i)       The priority  pollutant   and   hazardous    chemicals   specified   in    the provisions   of 40

C.F.R. §122.21, Appendix D (1990), which are adopted by reference in R 323.1221.

(ii)     The pollutants of initial focus specified in the provisions of 40 C.F.R. Part 132 (1995), water quality guidance for the Great Lakes system, which are adopted by reference in R 323.1221.

(iii)     The pollutants specified in table 1.

(iv)     Any other toxic substances that the  department  determines  are   of concern at a specific

site.

(v)     "Translator" means a value used to predict the ratio of total or total recoverable metal to

dissolved metal in a surface water of the state that  is then used to derive a total or total recoverable water quality-based effluent limit using dissolved aquatic life tier I or tier II values.

(w)     "Venting groundwater" means groundwater that is entering a surface water of the state from a facility as defined in section 20101 of 1994  PA 451, MCL 324.20101.

(x)       "Wasteload allocation (WLA)" means the allocation for an individual point source which is developed in accordance with R 323.1209 and which ensures that the level of water quality to be achieved by the point source complies with all applicable water quality standards.

(y)     "Water quality-based effluent limit (WQBEL)" means an effluent limit developed for an NPDES permit that will ensure that the level of water quality to be achieved by the point source complies with all applicable water quality standards.

(z)     "Water quality standards" means the Part 4. Water Quality Standards developed under Part 31 of 1994 PA 451, MCL 324.3101 et seq.

(aa) "Water quality value" means a tier I or tier II aquatic life or human health value or tier I wildlife value developed under R 323.1057.

(bb) "Wetland" means land characterized by the presence of water at a frequency and duration sufficient to support, and that under normal circumstances does support, wetland vegetation or aquatic life.

(cc) "Whole effluent toxicity" means the total toxic effect of an effluent measured directly with a toxicity test under R 323.1219.

(dd) "Wildlife value" means the maximum ambient water concentration of a substance at which adverse effects are not likely to  result  in population-level impacts to mammalian and avian wildlife populations from lifetime exposure through drinking water and aquatic food supply,  using the methodology specified in R 323.1057(3).

Table 1.

1-amino-2-methylanthraquinone 1-chloro-4-phenoxybenzene 1,1,1,2-tetrachloroethane

1,2-epoxybutane

1,2,3-trichlorobenzene 1,2:3,4-diepoxybutane 1,2,3,5-tetrachlorobenzene 1,3-butadiene

1,3-propane sultone 1,4-dioxane

1,5-naphthalenediamine 2-acetylaminofluorene 2-aminoanthraquinone

2-methyl-1-nitroanthraquinone 2-naphthylamine

2-nitropropane

2,4-diaminoanisole sulfate 2,4-diaminotoluene 2,3,4,5-tetrachlorophenol 2,3,4,6-tetrachlorophenol 2,3,5,6-tetrachlorophenol 2,4,5-trichlorophenol 2,4,5-trichlorotoluene 2,4,5-trimethylaniline

3-amino-9-ethylcarbazole

3-amino-9-ethylcarbazole hydrochloride 3-(chloromethyl)pyridine hydrochloride 4-aminobiphenyl

4-chloro-m-phenylenediamine 4-chloro-o-phenylenediamine 4-dimethylaminoazobenzene 4,4'-diaminodiphenyl ether

4,4'-methylenebis (2-methylaniline)

4,4'-methylenebis(N,N-dimethyl) benzenamine 4,4'-thiodianiline

5-chloro-o-toluidine 5-nitro-o-anisidine 5-nitroacenaphthene Abietic ccid

Acetone cyanohydrin Actinomycin D Aflatoxins

Aldicarb Aminoazobenzene Amitrole Anilazine

Aniline hydrochloride Antimycin A

1-amino-2-methylanthraquinone Aramite Azinphos-ethyl

Azinphos-methyl Azobenzene Barban Bendiocarb Benomyl

Bis(chloromethyl)ether Bromomethane Bromoxynil Butylbutanol nitrosamine Captafol Carbophenothion Chloramines Chlordecone Chlorfenvinphos

Chlorinated dibenzofurans Chlorobenzilate Chloromethane Chloroprene

Clonitralid Crotoxyphos Cupferron Cycasin Cycloheximide

Cyclophosphamide Dehydroabietic acid Demeton

Diallate

Dibromochloropropane (DBCP) Dichrotophos

Diethylhexyl phthalate Diethylstilbestrol Dihydrosafrole Dimethoate

Dimethyl disulphide Dimethyl sulfate Dimethylhydrazines Dinocap

Dinoseb Dioxathion Diphenyl ether EPN

Ethyl chloride Ethylene oxide

Ethylene thiourea Ethyleneimine Ethylmethanesulfonate Fensulfothion Fluchloralin Furathiazole Hexachlorocyclohexane

Hexamethylphosphoramide Hydrazine Hydrazobenzene

Hydrogen sulfide Hydroquinone

Isonicotinic acid hydrazine Kanechlor C

Ketene Lactonitrile Lasiocarpine Leptophos Malachite green Mestranol Methacrylonitrile Methomyl

Methyl chloroform Methyl hydrazine

Methylenebis(2-chloroaniline) Methylthiouracil

Mitomycin C Monocrotaline Monocrotophos Mustard gas

N-(2-hydroxyethyl) ethyleneimine N-methyl formamide

N,N'-diethylthiourea

N-nitroso-di-N-butylamine N-nitroso-N-ethylurea

N-nitroso-N-methylurea N-nitrosodiethylamine

N-nitrosomethylvinylamine N-nitrosomorpholine

N-nitrososarcosine Neoabietic acid Nifurthiazole Niridazole Nithiazide Nitrofen

Nitrogen mustard

o-Aminoazotoluene

o-Anisidine

o-Anisidine hydrochloride o-Phenylphenol

o-Toluidine

o-Toluidine hydrochloride Octachlorostyrene Oxydemetonmethyl

p-Chlorophenol p-Cresidine

p-Nitrosodiphenylamine Paraquat Pentachloronitrobenzene Phenazopyridine hydrochloride Phenesterin

Phenobarbitol Phenytoin sodium Phorate Phosazetim Phosmet Phosphamidon Piperonyl sulfoxide

Polybrominated biphenyls (PBB) Polychlorinated naphthalenes Propyleneimine

Propylthiouracil Rotenone Semicarbazide

Semicarbazide hydrochloride Silvex

Sodium fluoroacetate Sodium-o-phenylphenol Sulfallate

Sulfotepp TEPP

Terbufos Tetrachloroguaiacol Tetrachlorvinphos Tetranitromethane Thioacetamide Thiourea

Thiram

Triaryl phosphate esters Tributyltin (and salts and esters) Trichlorfon

Trifluralin Trimethylphosphate

Tris(2,3-dibromopropyl)phosphate

Uracil mustard Urethane Vinyl bromide Ziram

History: 1997 AACS; 2006 AACS.