NDEE Publications

Guidance for Conducting Reapplication Sampling for Publicly Owned Treatment Works (Formerly Known as Pollutant Scan) (Formerly Known as Pollutant Scan)

This guidance document is advisory in nature but is binding on an agency until amended by such agency. A guidance document does not include internal procedural documents that only affect the internal operations of the agency and does not impose additional requirements or penalties on regulated parties or include confidential information or rules and regulations made in accordance with the Administrative Procedure Act. If you believe that this guidance document imposes additional requirements or penalties on regulated parties, you may request a review of the document.

Form #: 18-002

Guidance Documents

Revised: 3/1/22

Size	File Name
355 KB	18-002 Guidance for Conducting Reapplication Sampling for Publicly Owned Treatment Works.pdf

The Clean Water Act regulations promulgated under 40 CFR 122.21(j) requires all publicly owned treatment works (POTWs) to provide data from a minimum of three samples taken within four and one-half years prior to the date of the permit application. Samples must be representative of the seasonal variation in the discharge from each outfall and the analytical results provided with the NPDES permit application.

The permittee shall monitor the effluent for the parameters set forth below using the analytical methods in 40 CFR 136. Monitoring is required to be completed three times during the current permit term with testing in the first, third and fifth year of the permit and must be representative of the seasonal variation in the discharge. The analytical data obtained from the monitoring shall be submitted as an attachment to the next NPDES permit application.

All POTWs are required to submit NPDES Combined Form 1 & 2A, National Pollutant Discharge Elimination System Permit Application for a Facility Discharging Domestic Wastewater six months prior to permit expiration. These sampling requirements must be met at that time and the analytical results attached. If any pollutants listed above are monitored in the accompanying NPDES permit, redundant sampling will not be necessary.

The Clean Water Act regulations promulgated under 40 CFR 122.21(j) requires all POTWs to provide analytical results for the following pollutants (Storet code in brackets):

Biochemical oxygen demand (BOD–5 or CBOD–5) [00310 or 80082]
Fecal coliform (unless E. coli is a current permit requirement) [31615 or 31648]
Design Flow Rate [50050]
pH [00400]
Temperature [00011]
Total suspended solids [00530]

The Clean Water Act regulations promulgated under 40 CFR 122.21(j) requires all POTWs with a design flow of 0.1 MGD or greater to provide the following additional data:

Additional Monitoring for POTWs with a Design Flow of or Greater

Ammonia (as N) [00610]
Chlorine (total residual, TRC), if chlorine is used for disinfection [50060]
Dissolved oxygen [00300]
Nitrate/Nitrite [00630]
Kjeldahl nitrogen [00625]
Oil and grease [00552]
Phosphorus [00665]
Total dissolved solids [70295]

Additional Monitoring for POTWs with a Design Flow of 1.0 MGD or Greater
The Clean Water Act regulations promulgated under 40 CFR 122.21(j) requires POTWs with a Design flow of 1.0 MGD or greater to provide the following additional data:

Metals Monitoring
Parameters	Units		Storet Code		Result	Method detection limit	Monitoring Frequency	Sample Type
Antimony, Total Recoverable	µg/L		01268		Report	Report	Three times per permit term	24 hour composite
Arsenic, Total Recoverable	µg/L		00978		Report	Report	Three times per permit term	24 hour composite
Beryllium, Total Recoverable	µg/L		00998		Report	Report	Three times per permit term	24 hour composite
Cadmium, Total Recoverable	µg/L		01113		Report	Report	Three times per permit term	24 hour composite
Chromium, Total Recoverable	µg/L		01118		Report	Report	Three times per permit term	24 hour composite
Copper, Total Recoverable	µg/L		01119		Report	Report	Three times per permit term	24 hour composite
Lead, Total Recoverable	µg/L		01114		Report	Report	Three times per permit term	24 hour composite
Mercury, Total Recoverable	µg/L		71901		Report	Report	Three times per permit term	24 hour composite
Nickel, Total Recoverable	µg/L		01074		Report	Report	Three times per permit term	24 hour composite
Selenium, Total Recoverable	µg/L		00981		Report	Report	Three times per permit term	24 hour composite
Silver, Total Recoverable	µg/L		01079		Report	Report	Three times per permit term	24 hour composite
Thallium, Total Recoverable	µg/L		00982		Report	Report	Three times per permit term	24 hour composite
Zinc, Total Recoverable	µg/L		01094		Report	Report	Three times per permit term	24 hour composite
Inorganic Compounds
Parameters		Units	Storet Code	Result		Method detection limit	Monitoring Frequency ^(b)	Sample Type
Cyanide		mg/L	00720	Report		Report	Three times per permit term	24 hour composite
Total Phenolic Compounds		mg/L	70029	Report		Report	Three times per permit term	24 hour composite
Total Phosphorus		mg/L	00665	Report		Report	Three times per permit term	24 hour composite
Hardness, as CaCO₃		mg/L	00900	Report		Report	Three times per permit term	24 hour composite
Volatile Organic Compounds (VOCs)
Parameters	Units		Storet Code		Result	Method detection limit	Monitoring Frequency	Sample Type
Acrolein	µg/L		34210		Report	Report	Three times per permit term	Grab
Acrylonitrile	µg/L		34215		Report	Report	Three times per permit term	Grab
Benzene	µg/L		34030		Report	Report	Three times per permit term	Grab
Bromoform	µg/L		32104		Report	Report	Three times per permit term	Grab
Carbon Tetrachloride	µg/L		32102		Report	Report	Three times per permit term	Grab
Chlorobenzene	µg/L		34301		Report	Report	Three times per permit term	Grab
Chlorodibromomethane	µg/L		32105		Report	Report	Three times per permit term	Grab
Chloroethane	µg/L		85811		Report	Report	Three times per permit term	Grab
2-Choroethylvinyl Ether	µg/L		34576		Report	Report	Three times per permit term	Grab
Chloroform	µg/L		32106		Report	Report	Three times per permit term	Grab
Dichorobromomethane	µg/L		32101		Report	Report	Three times per permit term	Grab
1,1-Dichloroethane	µg/L		34496		Report	Report	Three times per permit term	Grab
1.2-Dichloroethane	µg/L		32103		Report	Report	Three times per permit term	Grab
Trans 1,2-Dichloroethylene	µg/L		34546		Report	Report	Three times per permit term	Grab
1,1-Dichroethylene	µg/L		34501		Report	Report	Three times per permit term	Grab
1,2-Dichloropropane	µg/L		34541		Report	Report	Three times per permit term	Grab
1,3-Dichloropropylene	µg/L		77163		Report	Report	Three times per permit term	Grab
Ethylbenzene	µg/L		34371		Report	Report	Three times per permit term	Grab
Methyl Bromide	µg/L		34413		Report	Report	Three times per permit term	Grab
Methyl Chloride	µg/L		34418		Report	Report	Three times per permit term	Grab
Methylene Chloride	µg/L		34423		Report	Report	Three times per permit term	Grab
1,1,2,2-Tetrachloroethane	µg/L		34516		Report	Report	Three times per permit term	Grab
Tetrachloroethylene	µg/L		34475		Report	Report	Three times per permit term	Grab
Toluene	µg/L		34010		Report	Report	Three times per permit term	Grab
1,1,1-Trichloroethane	µg/L		34506		Report	Report	Three times per permit term	Grab
1,1,2-Trichloroethane	µg/L		34511		Report	Report	Three times per permit term	Grab
Trichloroethylene	µg/L		39180		Report	Report	Three times per permit term	Grab
Vinyl Chloride	µg/L		39175		Report	Report	Three times per permit term	Grab
Acid Extractable Compounds
Parameters	Units		Storet Code		Result	Method detection limit	Monitoring Frequency	Sample Type
p-Chloro-m-Cresol	µg/L		70021		Report	Report	Three times per permit term	24 hour composite
2-Chlorophenol	µg/L		34586		Report	Report	Three times per permit term	24 hour composite
2,4-Dichlorophenol	µg/L		34601		Report	Report	Three times per permit term	24 hour composite
2,4-Dimethylphenol	µg/L		34606		Report	Report	Three times per permit term	24 hour composite
4,6-Dinitro-o-Cresol	µg/L		03615		Report	Report	Three times per permit term	24 hour composite
2,4-Dintrophenol	µg/L		34616		Report	Report	Three times per permit term	24 hour composite
2-Nitrophenol	µg/L		34591		Report	Report	Three times per permit term	24 hour composite
4-Nitrophenol	µg/L		34646		Report	Report	Three times per permit term	24 hour composite
Pentachlorophenol	µg/L		39032		Report	Report	Three times per permit term	24 hour composite
Phenol	µg/L		34694		Report	Report	Three times per permit term	24 hour composite
2,4,6-Trichlorophenol	µg/L		34621		Report	Report	Three times per permit term	24 hour composite
Base Neutral Compounds
Parameters	Units		Storet Code		Result	Method detection limit	Monitoring Frequency	Sample Type
Acenaphthene	µg/L		34205		Report	Report	Three times per permit term	24 hour composite
Acenaphthylene	µg/L		34200		Report	Report	Three times per permit term	24 hour composite
Anthracene	µg/L		34220		Report	Report	Three times per permit term	24 hour composite
Benzidine	µg/L		39120		Report	Report	Three times per permit term	24 hour composite
Benzo(a)anthracene	µg/L		34526		Report	Report	Three times per permit term	24 hour composite
Benzo(a)pyrene	µg/L		34247		Report	Report	Three times per permit term	24 hour composite
3,4 Benzo-fluoranthene	µg/L		34230		Report	Report	Three times per permit term	24 hour composite
Benzo(ghi)perylene	µg/L		34521		Report	Report	Three times per permit term	24 hour composite
Benzo(k)fluoranthene	µg/L		34242		Report	Report	Three times per permit term	24 hour composite
Bis (2-chloroethoxy)methane	µg/L		34278		Report	Report	Three times per permit term	24 hour composite
Bis (2-chloroethyl)ether	µg/L		34273		Report	Report	Three times per permit term	24 hour composite
Bis (2-chlorosiopropyl)ether	µg/L		34283		Report	Report	Three times per permit term	24 hour composite
Bis (2-ethylhexyl)phthalate	µg/L		39100		Report	Report	Three times per permit term	24 hour composite
4-bromophenyl phenylether	µg/L		34636		Report	Report	Three times per permit term	24 hour composite
Butyl benzyl phthalate	µg/L		34292		Report	Report	Three times per permit term	24 hour composite
Base Neutral Compounds
Parameters	Units		Storet Code		Result	Method detection limit	Monitoring Frequency	Sample Type
2-Chloronaphthalene	µg/L		34581		Report	Report	Three times per permit term	24 hour composite
4-Chorphenyl phenyl ether	µg/L		34641		Report	Report	Three times per permit term	24 hour composite
Chrysene	µg/L		34320		Report	Report	Three times per permit term	24 hour composite
Di-N-butyl phthalate	µg/L		39110		Report	Report	Three times per permit term	24 hour composite
Di-N-octyl phthalate	µg/L		34596		Report	Report	Three times per permit term	24 hour composite
Dibenzo(A,H) anthracene	µg/L		34556		Report	Report	Three times per permit term	24 hour composite
1,2-Dichorobenzene	µg/L		34536		Report	Report	Three times per permit term	24 hour composite
1,3-Dichlorobenzene	µg/L		34566		Report	Report	Three times per permit term	24 hour composite
1,4-Dichlorobenzene	µg/L		34571		Report	Report	Three times per permit term	24 hour composite
3,3-Dichlorobenzidine	µg/L		34631		Report	Report	Three times per permit term	24 hour composite
Diethyl phthalate	µg/L		34336		Report	Report	Three times per permit term	24 hour composite
Dimethyl phthalate	µg/L		34341		Report	Report	Three times per permit term	24 hour composite
2,4-Dinitrotoluene	µg/L		34611		Report	Report	Three times per permit term	24 hour composite
2,6-Dinitrotolune	µg/L		34626		Report	Report	Three times per permit term	24 hour composite
1,2-Diphenylhydrazine	µg/L		34346		Report	Report	Three times per permit term	24 hour composite
Base Neutral Compounds
Parameters	Units		Storet Code		Result	Method detection limit	Monitoring Frequency	Sample Type
Fluoranthene	µg/L		34376		Report	Report	Three times per permit term	24 hour composite
Fluorene	µg/L		34381		Report	Report	Three times per permit term	24 hour composite
Hexachlorobenzene	µg/L		39700		Report	Report	Three times per permit term	24 hour composite
Hexachlorobutadiene	µg/L		34391		Report	Report	Three times per permit term	24 hour composite
Hexachlorocyclopentadiene	µg/L		34386		Report	Report	Three times per permit term	24 hour composite
Indeno(1,2,3-CD)pyrene	µg/L		34403		Report	Report	Three times per permit term	24 hour composite
Isophorone	µg/L		34408		Report	Report	Three times per permit term	24 hour composite
Naphthalene	µg/L		34696		Report	Report	Three times per permit term	24 hour composite
Nitrobenzene	µg/L		34447		Report	Report	Three times per permit term	24 hour composite
N-Nitrosodi-N-propylamine	µg/L		34428		Report	Report	Three times per permit term	24 hour composite
N-Nitroso-methylamine	µg/L		34438		Report	Report	Three times per permit term	24 hour composite
N-Nitroso-phenylamine	µg/L		34433		Report	Report	Three times per permit term	24 hour composite
Phenanthrene	µg/L		34461		Report	Report	Three times per permit term	24 hour composite
Pyrene	µg/L		34469		Report	Report	Three times per permit term	24 hour composite
1,2,4-Trichlorobenzene	µg/L		34551		Report	Report	Three times per permit term	24 hour composite