MEMORANDUM

TO: 2006 Effluent Guidelines Program Plan Docket, EPA Docket Number

OW-2004-032

FROM: Ellie Codding and Deb Bartram, ERG

DATE: 12 August 2005

SUBJECT: Publicly Owned Treatment Works (POTW) Percent Removals Used for the

TRIReleases2002 Database

INTRODUCTION

Under the Clean Water Act (CWA), EPA establishes national technology-based

regulations known as “effluent guidelines and pretreatment standards” to reduce pollutant

discharges from categories of industry discharging directly to waters of the United States or

discharging indirectly through Publicly Owned Treatment Works (POTWs). The CWA sections

301(d), 304(b), 304(g), and 307(b) require EPA to annually review these effluent guidelines and

pretreatment standards. Part of this annual review is a screening-level analysis of wastewater

discharges. As one part of this analysis, EPA uses readily available information from the Toxics

Release Inventory (TRI) to estimate the magnitude and toxicity of discharges from industrial

facilities.

In TRI, facilities report annual loads released to the environment of each toxic chemical

or chemical category that meets reporting requirements. TRI requires facilities to report on-site

releases to air, receiving streams, underground wells, and disposal to land, and several other

categories. Facilities must also report the amount of toxic chemicals in wastes transferred to offsite locations, including discharges to POTWs and other off-site locations, such as commercial

waste disposal facilities.

For facilities that reported transferring chemicals to POTWs in 2002, EPA used estimated

average POTW performance to calculate the amount of a pollutant that is ultimately discharged

to the receiving stream. This memorandum documents the pollutant removal efficiencies EPA

used to estimate average POTW performance. EPA estimated removal efficiencies for the 612

chemicals required to be reported annually to TRI. EPA used the following equation to

calculate the amount of pollutant discharged to receiving streams:

Discharge to Stream (lbs/yr) = [Transfer to POTW (lbs/yr)] × [1- POTW Removal (%)]
MEMORANDUM

12 August 2005

Page 2

POTW Removal Efficiency Data Sources

In the previous version of the TRI database, TRIReleases2000, EPA used the POTW

removal efficiencies from EPA’s Office of Pollution Prevention and Toxics’ (OPPT) Risk

Screening Environmental Indicators (RSEI) Model. Based on information provided by in

Technical Appendix B to the RSEI User’s Manual [1], POTW removal efficiencies in this model

were generally derived from data collected by EPA’s Risk Reduction Engineering Laboratory

(RREL), now known as the National Risk Management Research Laboratory (NRMRL). These

data are compiled in the RREL Treatability Database maintained by the U.S. EPA Risk

Reduction Engineering Laboratory [2].

For TRIReleases2002, EPA updated the POTW removal efficiencies to incorporate the

most recent data developed by the Office of Water’s Engineering and Analysis Division in

support of promulgated effluent limitations guidelines and standards (ELG), as well as more

recent data compiled by NRMRL [3]. EPA used removal efficiencies from the following data

sources, listed in order of preference:

C Recent ELG rulemakings;

C EPA/ORD’s NRMRL Treatability Database, Version 5.0 (February 2004); and

C EPA/OPPT’s Risk Screening Environmental Indicators (RSEI) model.

EPA retrieved POTW removal efficiencies from the documentation supporting the

promulgation of the following ELG Point Source Categories:

• Centralized Waste Treaters (CWT);

• Metal Products and Machinery (MPM);

• Iron and Steel Manufacturing (I&S);

• Industrial Laundries (IL); and

• Transportation Equipment Cleaning (TEC).

Of the 612 TRI chemicals, EPA identified ELG POTW removal efficiencies for 81 chemicals

and used other data sources for chemicals without ELG POTW removal efficiencies. 

Attachment A at the end of this memorandum lists the removal efficiencies used for the 612 TRI

chemicals in TRIReleases2002 and their sources.

How POTW Removals are Calculated for Existing ELGs Identified Above

To estimate POTW removal efficiencies used in the analyses supporting the development

of pretreatment standards, EPA generally uses data from the “50-POTW Study” [4] and the

NRMRL Treatability Database, Version 5.0. The 50-POTW Study contains measured pollutant

concentrations in domestic wastewater influent to and effluent from POTWs. These wastewaters

include contributions from both domestic and industrial sources. Industrial sources comprised
MEMORANDUM

12 August 2005

Page 3

between 1 and 65 percent of the flow entering the POTW, with an average industrial contribution

of 23 percent. The NRMRL database contains measured pollutant concentrations in industrial

and domestic wastewater influent to and effluent from a variety of treatment technologies. EPA

generally estimates POTW removal efficiencies using the 50-POTW Study and NRMRL data

with the following hierarchy:

1) Median POTW removal efficiency based on 50-POTW Study data, where influent

concentrations are greater than or equal to 10 times the analytical method

minimum level (ML). 

2) Median POTW removal efficiency based on 50-POTW Study data, where influent

concentrations are greater than or equal to two times the analytical method ML.

3) Median of biological treatment removal efficiency based on NRMRL domestic

and industrial wastewater data together.

4) Transfer of POTW removal efficiency from a similar chemical (e.g., generic

group removal such as dioxins/furans).

For additional information and data editing procedures, see Chapter 7 of the Development

Document for Final Effluent Limitations Guidelines and Standards for the Centralized Waste

Treatment Industry (EPA 821-R-00-020).

Where POTW removal efficiencies were not available for metal compounds, but were

available for the parent metal, EPA used the parent metal removal efficiency to estimate the

removal of metal compounds (e.g., used the removal for lead to estimate the removal for lead

compounds). For nitrate compounds, the RSEI removal efficiency (90 percent) is the same as

the removal efficiency used in the I&S ELG for Nitrite/Nitrates and TKN. EPA calculated this

removal efficiency by collecting data from POTWs that receive steel mill wastewater.

Next Steps

Attachment A at the end of this memorandum lists the 612 POTW removal efficiencies

used in TRIReleases2002 and their sources. Considerations for future refinements of POTW

removals include the following:

• EPA identified removal efficiency data for acephate in the TEC rulemaking

record, but the value cited was inconsistent with an earlier value cited in the

pesticides rulemaking record. Therefore, EPA used the RSEI removal efficiency

(45 percent), but recommends further review.
MEMORANDUM

12 August 2005

Page 4

• EPA recommends further research on POTW removals for chemicals with high

TWPE, especially sodium nitrite and chlorine.

• EPA recommends development of POTW removal efficiencies for chemicals with

no available ELG or RSEI data, such as creosote and diisocyanates.

In addition, EPA has initiated a new study of POTW performance. EPA is currently

evaluating published literature on the efficiency of POTW treatment systems to remove

pollutants entering the treatment system, including emerging contaminants such as

pharmaceuticals and personal care products. EPA is also collecting and evaluating available

treatment data reported by POTWs as part of their permit application or annual reporting

requirements. In addition, EPA has initiated limited POTW site visits and field sampling

activities based on the voluntary participation of selected facilities. 

References

1. U.S. EPA, User’s Manual for RSEI Version 2.1.2 [1988-2002 TRI Data], Office of

Pollution Prevention and Toxics, Washington DC, August 2004.

2. U.S. EPA, RREL Treatability Database, Office of Research and Development, Cincinnati

OH, 1994.

3. U.S. EPA, NRMRL Treatability Data Base, Version 5.0 (EPA 600/C-93/003a), Office of

Research and Development, Cincinnati OH, February 2004.

4. U.S. EPA, Fate of Priority Pollutants in Publicly Owned Treatment Works (EPA 440/1-

82/303), Effluent Guidelines Division, Washington DC, September 1982.
MEMORANDUM

12 August 2005

Page 5

Attachment A: List of POTW Removals

Chemical POTW %

Removal 

Primary Data Source1,2 Secondary Data

Source1

1-(3-chloroallyl)-3,5,7-triaza-1-

azoniaadamantane

 45 RSEI/NRMRL RSEI

1-Amino-2-methyl-anthraquinone 86 RSEI/NRMRL RSEI

1-Bromo-1-(bromomethyl)-1,3-

propanedicarbonitrile

 46 RSEI/NRMRL RSEI

1-Chloro-1,1-difluoroethane 97 RSEI/NRMRL RSEI

1-Chloro-1,1,2,2-tetrafluoroethane 99.5 RSEI/NRMRL RSEI

1,1-Dichloro-1-fluoroethane 91 RSEI/NRMRL RSEI

1,1-Dichloro-1,2,2-trifluoroethane (HCFC-123b) 97 RSEI/NRMRL RSEI

1,1-Dichloro-1,2,2,3,3-pentafluoropropane

(HCFC-22

 99.5 RSEI/NRMRL RSEI

1,1-Dichloro-1,2,3,3,3-pentafluoropropane

(HCFC-22

 99.5 RSEI/NRMRL RSEI

1,1-Dimethyl Hydrazine 75 RSEI/NRMRL RSEI

1,1,1-Trichloroethane 90 50 POTW Study TEC

1,1,1,2-Tetrachloro-2-fluoroethane (HCFC-121a) 62 RSEI/NRMRL RSEI

1,1,1,2-Tetrachloroethane 59 RSEI/NRMRL RSEI

1,1,2-Trichloroethane 40 RSEI/NRMRL RSEI

1,1,2,2-Tetrachloro-1-fluoroethane (HCFC-121) 62 RSEI/NRMRL RSEI

1,1,2,2-Tetrachloroethane 33 RSEI/NRMRL RSEI

1,2-Butylene oxide 76 RSEI/NRMRL RSEI

1,2-Dibromo-3-chloropropane (DBCP) 33 RSEI/NRMRL RSEI

1,2-Dibromoethane 54 RSEI/NRMRL RSEI

1,2-Dibromotetrafluoroethane 98 RSEI/NRMRL RSEI

1,2-Dichloro-1,1-difluoroethane 95 RSEI/NRMRL RSEI

1,2-Dichloro-1,1,2-trifluoroethane 97 RSEI/NRMRL RSEI

1,2-Dichloro-1,1,2,3,3-pentafluoropropane

(HCFC-22

 99.5 RSEI/NRMRL RSEI

1,2-Dichloro-1,1,3,3,3-pentafluoropropane

(HCFC-22

 99.5 RSEI/NRMRL RSEI

1,2-Dichlorobenzene 89 Pesticides Manual5 TEC

1,2-Dichloroethane 89 NRMRL CWT

1,2-Dichloroethylene 72 RSEI/NRMRL RSEI

1,2-Dichloropropane 68 RSEI/NRMRL RSEI

1,2-Diphenylhydrazine 62 50 POTW IL

1,2-Phenylenediamine dihydrochloride 45 RSEI/NRMRL RSEI

1,2-Phenylenediamine 45 RSEI/NRMRL RSEI

1,2,3-Trichloropropane 52 RSEI/NRMRL RSEI

1,2,4-Trichlorobenzene 86 RSEI/NRMRL RSEI

1,2,4-Trimethylbenzene 94 RSEI/NRMRL RSEI

1,3-Butadiene 97 RSEI/NRMRL RSEI

1,3-Dichloro-1,1,2,2,3-pentafluoropropane 99.5 RSEI/NRMRL RSEI

1,3-Dichloro-1,1,2,3,3-pentafluoropropane 99.5 RSEI/NRMRL RSEI
MEMORANDUM

12 August 2005

Page 6

Chemical POTW %

Removal 

Primary Data Source1,2 Secondary Data

Source1

(HCFC-22

1,3-Dichlorobenzene 77 RSEI/NRMRL RSEI

1,3-Dichloropropylene 83 RSEI/NRMRL RSEI

1,3-Phenylenediamine 45 RSEI/NRMRL RSEI

1,4-Dichloro-2-butene 90 RSEI/NRMRL RSEI

1,4-Dichlorobenzene 75 RSEI/NRMRL RSEI

1,4-Phenylenediamine dihydrochloride 45 RSEI/NRMRL RSEI

2-Acetylaminofluorene 58 RSEI/NRMRL RSEI

2-Aminoanthraquinone 48 RSEI/NRMRL RSEI

2-Chloro-1,1,1-trifluoroethane 99 RSEI/NRMRL RSEI

2-Chloro-1,1,1,2-tetrafluoroethane 99.5 RSEI/NRMRL RSEI

2-Chloroacetophenone 46 RSEI/NRMRL RSEI

2-Ethoxyethanol 92 RSEI/NRMRL RSEI

2-Mercaptobenzothiazole 48 RSEI/NRMRL RSEI

2-Methoxyethanol 92 RSEI/NRMRL RSEI

2-Methyllactonitrile 99.95 RSEI/NRMRL RSEI

2-Methylpyridine 92 RSEI/NRMRL RSEI

2-Nitrophenol 27 50 POTW Study MPM

2-Nitropropane 76 RSEI/NRMRL RSEI

2-Phenylphenol 95 RSEI/NRMRL RSEI

2,2-Dichloro-1,1,1-trifluoroethane 97 RSEI/NRMRL RSEI

2,2-Dichloro-1,1,1,3,3-pentafluoropropane

(HCFC-22

 99.5 RSEI/NRMRL RSEI

2,3-Dichloro-1,1,1,2,3-pentafluoropropane

(HCFC-22

 99.5 RSEI/NRMRL RSEI

2,3-Dichloropropene 66 RSEI/NRMRL RSEI

2,3,5-trimethylphenyl methylcarbamate 78 RSEI/NRMRL RSEI

2,4-D chlorocrotyl ester 99.7 RSEI/NRMRL RSEI

2,4-D butyl ester 99.6 RSEI/NRMRL RSEI

2,4-D isopropyl ester 98 RSEI/NRMRL RSEI

2,4-D 2-ethylhexyl ester 99.99 RSEI/NRMRL RSEI

2,4-D butoxyethyl ester 99 RSEI/NRMRL RSEI

2,4-D, propylene glycol butyl ether ester 99.6 RSEI/NRMRL RSEI

2,4-D sodium salt 94 RSEI/NRMRL RSEI

2,4-D ((2,4-dichlorophenoxy)acetic acid) 49 NRMRL TEC

2,4-D 2-ethyl-4-methylpentyl ester 99.97 RSEI/NRMRL RSEI

2,4-DB 89 RSEI/NRMRL RSEI

2,4-Diaminoanisole sulfate 45 RSEI/NRMRL RSEI

2,4-Diaminoanisole 45 RSEI/NRMRL RSEI

2,4-Diaminotoluene 45 RSEI/NRMRL RSEI

2,4-Dichlorophenol 95 RSEI/NRMRL RSEI

2,4-Dimethylphenol 51 50-POTW 2 × ML I&S

2,4-Dinitrophenol 78 50 POTW/NRMRL

Average3

MPM

2,4-Dinitrotoluene 47 RSEI/NRMRL RSEI
MEMORANDUM

12 August 2005

Page 7

Chemical POTW %

Removal 

Primary Data Source1,2 Secondary Data

Source1

2,4-Dithiobiuret 49 RSEI/NRMRL RSEI

2,4-DP (Dichlorprop) 66 RSEI/NRMRL RSEI

2,4,5-Trichlorophenol 75 RSEI/NRMRL RSEI

2,4,6-Trichlorophenol 28 NRMRL CWT

2,6-Dinitrotoluene 78 50 POTW/NRMRL

Average3

MPM

2,6-Xylidine 47 RSEI/NRMRL RSEI

3-Chloro-1,1,1-trifluoropropane (HCFC-253fb) 99 RSEI/NRMRL RSEI

3-Chloro-2-methyl-1-propene 96 RSEI/NRMRL RSEI

3-Chloropropionitrile 46 RSEI/NRMRL RSEI

3-Iodo-2-propynyl butylcarbamate 77 RSEI/NRMRL RSEI

3,3'-Dichlorobenzidine dihydrochloride 68 RSEI/NRMRL RSEI

3,3'-Dichlorobenzidine sulfate 68 RSEI/NRMRL RSEI

3,3'-Dichlorobenzidine 68 RSEI/NRMRL RSEI

3,3'-Dimethoxybenzidine hydrochloride 46 RSEI/NRMRL RSEI

3,3'-Dimethoxybenzidine dihydrochloride 46 RSEI/NRMRL RSEI

3,3'-Dimethoxybenzidine 46 RSEI/NRMRL RSEI

3,3'-Dimethylbenzidine dihydrochloride 55 RSEI/NRMRL RSEI

3,3'-Dimethylbenzidine 77 RSEI/NRMRL RSEI

3,3'-Dimethylbenzidine dihydrofluoride 48 RSEI/NRMRL RSEI

3,3-Dichloro-1,1,1,2,2-pentafluoropropane

(HCFC-22

 99.5 RSEI/NRMRL RSEI

4-Aminoazobenzene 65 RSEI/NRMRL RSEI

4-Aminodiphenyl 53 RSEI/NRMRL RSEI

4-Dimethylaminoazobenzene 96 RSEI/NRMRL RSEI

4-Nitrobiphenyl 93 RSEI/NRMRL RSEI

4-Nitrophenol 78 50 POTW/NRMRL

Average3

MPM

4,4'-Diaminodiphenylether 76 RSEI/NRMRL RSEI

4,4'-Diphenylmethane diisocyanate 99.99 RSEI/NRMRL RSEI

4,4'-Isopropylidenediphenol 86 RSEI/NRMRL RSEI

4,4'-Methylenebis(2-chloroaniline) 82 RSEI/NRMRL RSEI

4,4'-Methylenebis(N,N-dimethylbenzenamine) 93 RSEI/NRMRL RSEI

4,4'-Methylenedianiline 75 RSEI/NRMRL RSEI

4,4'-Thiodianiline 47 RSEI/NRMRL RSEI

4,6-Dinitro-o-cresol 47 RSEI/NRMRL RSEI

5-Nitro-o-anisidine 46 RSEI/NRMRL RSEI

5-Nitro-o-toluidine 46 RSEI/NRMRL RSEI

Abamectin 98 RSEI/NRMRL RSEI

Acephate 45 RSEI/NRMRL RSEI

Acetaldehyde 92 RSEI/NRMRL RSEI

Acetamide 92 RSEI/NRMRL RSEI

Acetonitrile 75 RSEI/NRMRL RSEI

Acetophenone 95 NRMRL CWT

Acifluorfen, sodium salt 75 RSEI/NRMRL RSEI
MEMORANDUM

12 August 2005

Page 8

Chemical POTW %

Removal 

Primary Data Source1,2 Secondary Data

Source1

Acrolein 78 50 POTW/NRMRL

Average3

MPM

Acrylamide 92 RSEI/NRMRL RSEI

Acrylic acid 92 RSEI/NRMRL RSEI

Acrylonitrile 95 NRMRL TEC

Alachlor 89 RSEI/NRMRL RSEI

Aldicarb 46 RSEI/NRMRL RSEI

Aldrin 99 RSEI/NRMRL RSEI

Allyl alcohol 92 RSEI/NRMRL RSEI

Allyl chloride 84 RSEI/NRMRL RSEI

Allylamine 75 RSEI/NRMRL RSEI

alpha-Hexachlorocyclohexane 85 50 POTW TEC

alpha-Naphthylamine 76 RSEI/NRMRL RSEI

Aluminum phosphide 2 RSEI/NRMRL RSEI

Aluminum oxide (fibrous forms) 2 RSEI/NRMRL RSEI

Aluminum (fume or dust) 91 50 POTW I&S

Ametryn 55 RSEI/NRMRL RSEI

Amitraz 99 RSEI/NRMRL RSEI

Amitrole 45 RSEI/NRMRL RSEI

Ammonia 39 50 POTW I&S

Ammonium sulfate 2 RSEI/NRMRL RSEI

Ammonium nitrate (solution) 2 RSEI/NRMRL RSEI

Anilazine 81 RSEI/NRMRL RSEI

Aniline 93 NRMRL CWT

Anthracene 96 50 POTW - 10 X ML CWT

Antimony compounds 67 50 POTW - 2 X ML CWT

Antimony 67 50 POTW - 2 X ML CWT

Arsenic 66 50 POTW - 2 X ML CWT

Arsenic compounds 66 50 POTW - 2 X ML CWT

Asbestos (friable) RSEI/NRMRL RSEI

Atrazine 26 RSEI/NRMRL RSEI

Auramine 50 RSEI/NRMRL RSEI

Barium 55 50 POTW - 2 X ML CWT

Barium compounds 55 50 POTW - 2 X ML CWT

Bendiocarb 77 RSEI/NRMRL RSEI

Benfluralin 97 RSEI/NRMRL RSEI

Benomyl 51 RSEI/NRMRL RSEI

Benzal chloride 99.99 RSEI/NRMRL RSEI

Benzamide 92 RSEI/NRMRL RSEI

Benzene 95 NRMRL CWT

Benzidine 75 RSEI/NRMRL RSEI

Benzo(g,h,i)perylene RSEI/NRMRL RSEI

Benzotrichloride 100 RSEI/NRMRL RSEI

Benzoyl peroxide 97 RSEI/NRMRL RSEI

Benzoyl chloride 100 RSEI/NRMRL RSEI
MEMORANDUM

12 August 2005

Page 9

Chemical POTW %

Removal 

Primary Data Source1,2 Secondary Data

Source1

Benzyl chloride 78 RSEI/NRMRL RSEI

Beryllium 61 NRMRL CWT

Beryllium compounds 61 NRMRL CWT

beta-Naphthylamine 77 RSEI/NRMRL RSEI

beta-Propiolactone 96 RSEI/NRMRL RSEI

Bifenthrin 99.9 RSEI/NRMRL RSEI

Biphenyl 96 NRMRL CWT

Bis(2-chloro-1-methethyl)ether 50 RSEI/NRMRL RSEI

Bis(2-chloroethoxy)methane 23 RSEI/NRMRL RSEI

Bis(2-chloroethyl)ether 23 RSEI/NRMRL RSEI

Bis(chloromethyl)ether 100 RSEI/NRMRL RSEI

Bis(tributyltin) oxide 91 RSEI/NRMRL RSEI

Boron trifluoride 2 RSEI/NRMRL RSEI

Boron trichloride 2 RSEI/NRMRL RSEI

Bromacil 47 RSEI/NRMRL RSEI

Bromacil lithium salt 46 RSEI/NRMRL RSEI

Bromine 2 RSEI/NRMRL RSEI

Bromochlorodifluoromethane 97 RSEI/NRMRL RSEI

Bromoform (Tribromomethane) 55 RSEI/NRMRL RSEI

Bromomethane (Methyl bromide) 77 RSEI/NRMRL RSEI

Bromotrifluoromethane (Halon 1301) 99 RSEI/NRMRL RSEI

Bromoxynil 87 RSEI/NRMRL RSEI

Bromoxynil octanoate 99.9 RSEI/NRMRL RSEI

Brucine 46 RSEI/NRMRL RSEI

Butyl acrylate 93 RSEI/NRMRL RSEI

Butyraldehyde 92 RSEI/NRMRL RSEI

C.I. Direct Brown 95 99.7 RSEI/NRMRL RSEI

C.I. Direct Black 38 98 RSEI/NRMRL RSEI

C.I. Food Red 5 49 RSEI/NRMRL RSEI

C.I. Disperse Yellow 3 84 RSEI/NRMRL RSEI

C.I. Basic Red 1 99.5 RSEI/NRMRL RSEI

C.I. Acid Green 3 45 RSEI/NRMRL RSEI

C.I. Acid Red 114 99.9 RSEI/NRMRL RSEI

C.I. Direct Blue 218 RSEI/NRMRL RSEI

C.I. Solvent Orange 7 99.7 RSEI/NRMRL RSEI

C.I. Vat Yellow 4 99 RSEI/NRMRL RSEI

C.I. Food Red 15 46 RSEI/NRMRL RSEI

C.I. Basic Green 4 45 RSEI/NRMRL RSEI

C.I. Solvent Yellow 3 91 RSEI/NRMRL RSEI

C.I. Direct Blue 6 54 RSEI/NRMRL RSEI

C.I. Solvent Yellow 14 99 RSEI/NRMRL RSEI

Cadmium 90 50 POTW - 10 X ML CWT

Cadmium compounds 90 50 POTW - 10 X ML CWT

Calcium cyanamide 2 RSEI/NRMRL RSEI

Captan 77 RSEI/NRMRL RSEI
MEMORANDUM

12 August 2005

Page 10

Chemical POTW %

Removal 

Primary Data Source1,2 Secondary Data

Source1

Carbaryl 93 RSEI/NRMRL RSEI

Carbofuran 93 RSEI/NRMRL RSEI

Carbon disulfide 84 NRMRL MPM

Carbon tetrachloride 93 RSEI/NRMRL RSEI

Carbonyl sulfide 96 RSEI/NRMRL RSEI

Carboxin 76 RSEI/NRMRL RSEI

Catechol 92 RSEI/NRMRL RSEI

CFC 114 (1,2-dichloro,1,1,2,2-tetrafluoroethane) 99.9 RSEI/NRMRL RSEI

CFC 115 (chloropentafluoroethane) 99.9 RSEI/NRMRL RSEI

CFC-11 (trichlorofluoromethane) 77 50 POTW/NRMRL

Average3

MPM

CFC-12 (dichlorodifluoromethane) 99 RSEI/NRMRL RSEI

Chinomethionat (6-methyl-1,3-dithiolo[4,5-

b]quinox

 77 RSEI/NRMRL RSEI

Chloramben 46 RSEI/NRMRL RSEI

Chlordane 99 RSEI/NRMRL RSEI

Chlorendic acid 33 RSEI/NRMRL RSEI

Chlorimuron ethyl 77 RSEI/NRMRL RSEI

Chlorine dioxide 2 RSEI/NRMRL RSEI

Chlorine 1.87 RSEI/NRMRL RSEI

Chloroacetic acid 92 RSEI/NRMRL RSEI

Chlorobenzene 96 50 POTW Study MPM

Chlorobenzilate 97 RSEI/NRMRL RSEI

Chlorodifluoromethane (HCFC-22) 61 RSEI/NRMRL RSEI

Chloroethane (Ethyl chloride) 78 50 POTW/NRMRL

Average3

MPM

Chloroform 73 NRMRL CWT

Chloromethane 88 RSEI/NRMRL RSEI

Chloromethyl methyl ether 100 RSEI/NRMRL RSEI

Chlorophenols 96 RSEI/NRMRL RSEI

Chloropicrin 62 RSEI/NRMRL RSEI

Chloroprene 96 RSEI/NRMRL RSEI

Chlorotetrafluoroethane 99.5 RSEI/NRMRL RSEI

Chlorothalonil 82 RSEI/NRMRL RSEI

Chlorotrifluoromethane 99.8 RSEI/NRMRL RSEI

Chlorpyrifos methyl 98 RSEI/NRMRL RSEI

Chlorsulfuron 47 RSEI/NRMRL RSEI

Chromium 80 50 POTW - 10 X ML CWT

Chromium compounds 80 50 POTW - 10 X ML CWT

Cobalt compounds 10 50 POTW -2 X ML CWT

Cobalt 10 50 POTW -2 X ML CWT

Copper compounds 84 50 POTW - 10 X ML CWT

Copper 84 50 POTW - 10 X ML CWT

Creosote, coal tar RSEI/NRMRL RSEI

Cresol (mixed isomers) 92 RSEI/NRMRL RSEI
MEMORANDUM

12 August 2005

Page 11

Chemical POTW %

Removal 

Primary Data Source1,2 Secondary Data

Source1

Crotonaldehyde 92 RSEI/NRMRL RSEI

Cumene 98 RSEI/NRMRL RSEI

Cumene hydroperoxide 76 RSEI/NRMRL RSEI

Cupferron 22 RSEI/NRMRL RSEI

Cyanazine 24 RSEI/NRMRL RSEI

Cyanide compounds 70.00 50 POTW 10 X ML CWT

Cycloate 94 RSEI/NRMRL RSEI

Cyclohexane 89 RSEI/NRMRL RSEI

Cyclohexanol 92 RSEI/NRMRL RSEI

Cyfluthrin 99.9 RSEI/NRMRL RSEI

Cyhalothrin 99.6 RSEI/NRMRL RSEI

D-trans-allethrin (D-trans-chrysanthemic acid of

D

 99 RSEI/NRMRL RSEI

Dazomet 97 RSEI/NRMRL RSEI

Dazomet, sodium salt 46 RSEI/NRMRL RSEI

Decabromodiphenyl ether 99 RSEI/NRMRL RSEI

Desmedipham 91 RSEI/NRMRL RSEI

Di(2-ethylhexyl) phthalate 60 50 POTW - 10 X ML CWT

Diallate 86 RSEI/NRMRL RSEI

Diaminotoluene (mixed isomers) 85 RSEI/NRMRL RSEI

Diazinon 93 RSEI/NRMRL RSEI

Diazomethane 92 RSEI/NRMRL RSEI

Dibenzofuran 98 NRMRL I&S

Dibutyl phthalate 85 50 POTW - 10 xML CWT

Dicamba 47 RSEI/NRMRL RSEI

Dichloran 51 RSEI/NRMRL RSEI

Dichloro-1,1,2-trifluoroethane 97 RSEI/NRMRL RSEI

Dichlorobenzene (mixed isomers) 75 RSEI/NRMRL RSEI

Dichlorobromomethane 64 RSEI/NRMRL RSEI

Dichlorofluoromethane 71 RSEI/NRMRL RSEI

Dichloromethane 54 NRMRL CWT

Dichloropentafluoropropane 99.5 RSEI/NRMRL RSEI

Dichlorophene 78 RSEI/NRMRL RSEI

Dichlorotrifluoroethane 97 RSEI/NRMRL RSEI

Dichlorvos 75 RSEI/NRMRL RSEI

Diclofop methyl 96 RSEI/NRMRL RSEI

Dicofol 98 RSEI/NRMRL RSEI

Dicyclopentadiene 97 RSEI/NRMRL RSEI

Diepoxybutane 75 RSEI/NRMRL RSEI

Diethanolamine 92 RSEI/NRMRL RSEI

Diethatyl ethyl 90 RSEI/NRMRL RSEI

Diethyl sulfate 95 RSEI/NRMRL RSEI

Diflubenzuron 94 RSEI/NRMRL RSEI

Diglycidyl resorcinol ether 75 RSEI/NRMRL RSEI

Dihydrosafrole 71 RSEI/NRMRL RSEI
MEMORANDUM

12 August 2005

Page 12

Chemical POTW %

Removal 

Primary Data Source1,2 Secondary Data

Source1

Diisocyanates RSEI/NRMRL RSEI

Dimethipin 45 RSEI/NRMRL RSEI

Dimethoate 45 RSEI/NRMRL RSEI

Dimethyl chlorothiophosphate 97 RSEI/NRMRL RSEI

Dimethyl sulfate 97 RSEI/NRMRL RSEI

Dimethyl phthalate 78 50 POTW/NRMRL

Average3

MPM

Dimethylamine 92 RSEI/NRMRL RSEI

Dimethylamine dicamba 46 RSEI/NRMRL RSEI

Dimethylcarbamyl chloride 100 RSEI/NRMRL RSEI

Dinitrobutyl phenol (Dinoseb) 46 RSEI/NRMRL RSEI

Dinitrotoluene (mixed isomers) 47 RSEI/NRMRL RSEI

Dinocap 99.6 RSEI/NRMRL RSEI

Dioxane 46 NRMRL MPM

Dioxin and dioxin-like compounds 83 Transfer from

1,2,3,4,6,7,8-HPCDF

(Source: NRMRL) 4

TEC

Diphenamid 53 RSEI/NRMRL RSEI

Diphenylamine 77 50 POTW/NRMRL

Average3

MPM

Dipotassium endothall 76 RSEI/NRMRL RSEI

Dipropyl isocinchomeronate 97 RSEI/NRMRL RSEI

Disodium cyanodithioimidocarbonate 78 RSEI/NRMRL RSEI

Diuron 51 RSEI/NRMRL RSEI

Dodine 75 RSEI/NRMRL RSEI

Epichlorohydrin 46 RSEI/NRMRL RSEI

Ethoprop 71 RSEI/NRMRL RSEI

Ethyl chloroformate 82 RSEI/NRMRL RSEI

Ethyl acrylate 92 RSEI/NRMRL RSEI

Ethyl dipropylthiocarbamate 60 RSEI/NRMRL RSEI

Ethylbenzene 94 NRMRL CWT

Ethylene glycol 92 RSEI/NRMRL RSEI

Ethylene 99 RSEI/NRMRL RSEI

Ethylene thiourea 45 RSEI/NRMRL RSEI

Ethylene oxide 92 RSEI/NRMRL RSEI

Ethylenebisdithiocarbamic acid, salts and esters 2 RSEI/NRMRL RSEI

Ethyleneimine (Aziridine) 46 RSEI/NRMRL RSEI

Ethylidene dichloride 70 50 POTW Study MPM

Famphur 76 RSEI/NRMRL RSEI

Fenarimol 71 RSEI/NRMRL RSEI

Fenbutatin oxide (Vendex) 94 RSEI/NRMRL RSEI

Fenoxaprop ethyl 99.6 RSEI/NRMRL RSEI

Fenoxycarb 98 RSEI/NRMRL RSEI

Fenpropathrin 99.9 RSEI/NRMRL RSEI

Fenthion 96 RSEI/NRMRL RSEI
MEMORANDUM

12 August 2005

Page 13

Chemical POTW %

Removal 

Primary Data Source1,2 Secondary Data

Source1

Fenvalerate 99.6 RSEI/NRMRL RSEI

Ferbam 45 RSEI/NRMRL RSEI

Fluazifop butyl 99.8 RSEI/NRMRL RSEI

Fluometuron 48 RSEI/NRMRL RSEI

Fluorine 2 RSEI/NRMRL RSEI

Fluorouracil (5-fluorouracil) 45 RSEI/NRMRL RSEI

Fluvalinate 99.9 RSEI/NRMRL RSEI

Folpet 80 RSEI/NRMRL RSEI

Fomesafen 53 RSEI/NRMRL RSEI

Formaldehyde 92 RSEI/NRMRL RSEI

Formic acid 92 RSEI/NRMRL RSEI

Freon 113 99.5 RSEI/NRMRL RSEI

Glycol ethers 92 RSEI/NRMRL RSEI

Heptachlor 99 RSEI/NRMRL RSEI

Hexachloro-1,3-butadiene 95 RSEI/NRMRL RSEI

Hexachlorobenzene 98 RSEI/NRMRL RSEI

Hexachlorocyclopentadiene 99 RSEI/NRMRL RSEI

Hexachloroethane 77 RSEI/NRMRL RSEI

Hexachloronaphthalene 99 RSEI/NRMRL RSEI

Hexachlorophene 99 RSEI/NRMRL RSEI

Hexamethylphosphoramide 45 RSEI/NRMRL RSEI

Hexazinone 85 RSEI/NRMRL RSEI

Hydramethylnon 99.7 RSEI/NRMRL RSEI

Hydrazine 85 RSEI/NRMRL RSEI

Hydrazine sulfate 2 RSEI/NRMRL RSEI

Hydrochloric acid 100 RSEI/NRMRL RSEI

Hydrogen cyanide 7 RSEI/NRMRL RSEI

Hydrogen fluoride 2 RSEI/NRMRL RSEI

Hydroquinone 92 RSEI/NRMRL RSEI

Imazalil 79 RSEI/NRMRL RSEI

Iron pentacarbonyl RSEI/NRMRL RSEI

Isobutyraldehyde 92 RSEI/NRMRL RSEI

Isodrin 99 RSEI/NRMRL RSEI

Isofenphos 96 RSEI/NRMRL RSEI

Isopropyl alcohol 92 RSEI/NRMRL RSEI

Isosafrole 64 RSEI/NRMRL RSEI

Lactofen 99 RSEI/NRMRL RSEI

Lead compounds 77 50 POTW - 10 X ML CWT

Lead 77 50 POTW - 10 X ML CWT

Lindane 75 50 POTW STUDY TEC

Linuron 59 RSEI/NRMRL RSEI

Lithium carbonate 2 RSEI/NRMRL RSEI

m-Cresol 92 RSEI/NRMRL RSEI

m-Dinitrobenzene 46 RSEI/NRMRL RSEI

m-Xylene 65 NRMRL CWT
MEMORANDUM

12 August 2005

Page 14

Chemical POTW %

Removal 

Primary Data Source1,2 Secondary Data

Source1

Malathion 93 RSEI/NRMRL RSEI

Maleic anhydride 100 RSEI/NRMRL RSEI

Malononitrile 45 RSEI/NRMRL RSEI

Maneb 2 RSEI/NRMRL RSEI

Manganese 41 NRMRL CWT

Manganese compounds 41 NRMRL CWT

Mecoprop 58 RSEI/NRMRL RSEI

Mercury 90 50 POTW - 10 X ML CWT

Mercury compounds 90 50 POTW - 10 X ML CWT

Merphos 99.99 RSEI/NRMRL RSEI

Methacrylonitrile 76 RSEI/NRMRL RSEI

Metham sodium 76 RSEI/NRMRL RSEI

Methanol 92 RSEI/NRMRL RSEI

Methazole 60 RSEI/NRMRL RSEI

Methiocarb 81 RSEI/NRMRL RSEI

Methoxone sodium salt 75 RSEI/NRMRL RSEI

Methoxone (MCPA) 61 RSEI/NRMRL RSEI

Methoxychlor 99 RSEI/NRMRL RSEI

Methyl tert-butyl ether 53 RSEI/NRMRL RSEI

Methyl iodide 75 RSEI/NRMRL RSEI

Methyl methacrylate 99.96 NRMRL MPM

Methyl isothiocyanate 99.96 RSEI/NRMRL RSEI

Methyl isocyanate 99.95 RSEI/NRMRL RSEI

Methyl hydrazine 75 RSEI/NRMRL RSEI

Methyl isobutyl ketone 88 NRMRL CWT

Methyl ethyl ketone 97 NRMRL CWT

Methyl acrylate 92 RSEI/NRMRL RSEI

Methyl parathion 94 RSEI/NRMRL RSEI

Methyl chlorocarbonate 99.6 RSEI/NRMRL RSEI

Methylene bromide 56 RSEI/NRMRL RSEI

Metiram 2 RSEI/NRMRL RSEI

Metribuzin 46 RSEI/NRMRL RSEI

Mevinphos 92 RSEI/NRMRL RSEI

Michlers Ketone 60 RSEI/NRMRL RSEI

Molinate 60 RSEI/NRMRL RSEI

Molybdenum trioxide 3 RSEI/NRMRL RSEI

Monuron 23 RSEI/NRMRL RSEI

Mustard gas 99.99 RSEI/NRMRL RSEI

Myclobutanil 68 RSEI/NRMRL RSEI

n-Butyl alcohol 92 RSEI/NRMRL RSEI

n-Hexane 99.9 RSEI/NRMRL RSEI

N-methyl-2-pyrrolidone 92 RSEI/NRMRL RSEI

N-methylolacrylamide 92 RSEI/NRMRL RSEI

N-Nitroso-N-ethylurea 45 RSEI/NRMRL RSEI

N-Nitroso-N-methylurea 45 RSEI/NRMRL RSEI
MEMORANDUM

12 August 2005

Page 15

Chemical POTW %

Removal 

Primary Data Source1,2 Secondary Data

Source1

N-Nitrosodi-n-butylamine 47 RSEI/NRMRL RSEI

N-Nitrosodi-n-propylamine 46 RSEI/NRMRL RSEI

N-Nitrosodiethylamine 22 RSEI/NRMRL RSEI

N-Nitrosodimethylamine 78 50 POTW/NRMRL

Average3

MPM

N-Nitrosodiphenylamine 90 NRMRL MPM

N-Nitrosomethylvinylamine 59 RSEI/NRMRL RSEI

N-Nitrosomorpholine 45 RSEI/NRMRL RSEI

N-Nitrosonornicotine 45 RSEI/NRMRL RSEI

N-Nitrosopiperidine 77 50 POTW/NRMRL

Average3

MPM

Nabam 90 RSEI/NRMRL RSEI

Naled 75 RSEI/NRMRL RSEI

Naphthalene 95 50 POTW - 10 × ML I&S

Nickel 51 50 POTW - 10 X ML CWT

Nickel compounds 51 50 POTW - 10 X ML CWT

Nicotine and salts 2 RSEI/NRMRL RSEI

Nitrapyrin 66 RSEI/NRMRL RSEI

Nitrate compounds 90 RSEI/NRMRL RSEI

Nitric acid 100 RSEI/NRMRL RSEI

Nitrilotriacetic acid 92 RSEI/NRMRL RSEI

Nitrobenzene 92 RSEI/NRMRL RSEI

Nitrofen 96 RSEI/NRMRL RSEI

Nitrogen mustard 99 RSEI/NRMRL RSEI

Nitroglycerin 75 RSEI/NRMRL RSEI

N,N-Dimethylaniline 49 RSEI/NRMRL RSEI

N,N-Dimethylformamide 85 NRMRL CWT

Norflurazon 48 RSEI/NRMRL RSEI

o-Anisidine 75 RSEI/NRMRL RSEI

o-Anisidine hydrochloride 46 RSEI/NRMRL RSEI

o-Cresol 53 NRMRL CWT

o-Dinitrobenzene 46 RSEI/NRMRL RSEI

o-Toluidine 93 Transfer from aniline; 50

POTW Study 

I&S

o-Toluidine hydrochloride 46 RSEI/NRMRL RSEI

o-Xylene 77 50 POTW/NRMRL

Average3

MPM

Octachloronaphthalene 99 RSEI/NRMRL RSEI

Octochlorostyrene RSEI/NRMRL RSEI

Oryzalin 51 RSEI/NRMRL RSEI

Osmium tetroxide 3 RSEI/NRMRL RSEI

Oxadiazon 97 RSEI/NRMRL RSEI

Oxydemeton methyl 75 RSEI/NRMRL RSEI

Oxyfluorfen 97 RSEI/NRMRL RSEI

Ozone 2 RSEI/NRMRL RSEI
MEMORANDUM

12 August 2005

Page 16

Chemical POTW %

Removal 

Primary Data Source1,2 Secondary Data

Source1

p-Anisidine 92 RSEI/NRMRL RSEI

p-Chloro-o-toluidine 48 RSEI/NRMRL RSEI

p-Chloroaniline 46 RSEI/NRMRL RSEI

p-Chlorophenyl isocyanate 99 RSEI/NRMRL RSEI

p-Cresidine 46 RSEI/NRMRL RSEI

p-Cresol 72 NRMRL CWT

p-Dinitrobenzene 46 RSEI/NRMRL RSEI

p-Nitroaniline 46 RSEI/NRMRL RSEI

p-Nitrosodiphenylamine 58 RSEI/NRMRL RSEI

p-Phenylenediamine 45 RSEI/NRMRL RSEI

p-Xylene 96 RSEI/NRMRL RSEI

Paraldehyde 45 RSEI/NRMRL RSEI

Paraquat dichloride 45 RSEI/NRMRL RSEI

Parathion 98 RSEI/NRMRL RSEI

Pebulate 98 RSEI/NRMRL RSEI

Pendimethalin 99 RSEI/NRMRL RSEI

Pentachlorobenzene 84 RSEI/NRMRL RSEI

Pentachloroethane 58 RSEI/NRMRL RSEI

Pentachlorophenol 36 50 POTW - 2X ML CWT

Pentobarbital sodium 47 RSEI/NRMRL RSEI

Perchloromethyl mercaptan 88 RSEI/NRMRL RSEI

Permethrin 99.9 RSEI/NRMRL RSEI

Peroxyacetic acid 92 RSEI/NRMRL RSEI

Phenanthrene 95 50 POTW - 10 × ML I&S

Phenol 95 50 POTW - 10 X ML CWT

Phenothrin 99.9 RSEI/NRMRL RSEI

Phenytoin 49 RSEI/NRMRL RSEI

Phosgene 100 RSEI/NRMRL RSEI

Phosphine 2 RSEI/NRMRL RSEI

Phosphorus (yellow or white) 69 NRMRL TEC

Phthalic anhydride 99 RSEI/NRMRL RSEI

Picloram 10 RSEI/NRMRL RSEI

Picric acid 22 RSEI/NRMRL RSEI

Piperonyl butoxide 97 RSEI/NRMRL RSEI

Pirimiphos methyl 97 RSEI/NRMRL RSEI

Polybrominated biphenyls (PBBs) 94 RSEI/NRMRL RSEI

Polychlorinated alkanes RSEI/NRMRL RSEI

Polychlorinated biphenyls (PCBs) 99 RSEI/NRMRL RSEI

Polycyclic aromatic compounds 93 RSEI/NRMRL RSEI

Potassium bromate 2 RSEI/NRMRL RSEI

Potassium N-methyldithiocarbamate 76 RSEI/NRMRL RSEI

Potassium dimethyldithiocarbamate 77 RSEI/NRMRL RSEI

Profenofos 99 RSEI/NRMRL RSEI

Prometryn 44 RSEI/NRMRL RSEI

Pronamide 70 RSEI/NRMRL RSEI
MEMORANDUM

12 August 2005

Page 17

Chemical POTW %

Removal 

Primary Data Source1,2 Secondary Data

Source1

Propachlor 76 RSEI/NRMRL RSEI

Propane sultone 71 RSEI/NRMRL RSEI

Propanil 56 RSEI/NRMRL RSEI

Propargite 99.95 RSEI/NRMRL RSEI

Propargyl alcohol 92 RSEI/NRMRL RSEI

Propetamphos 78 RSEI/NRMRL RSEI

Propiconazole 68 RSEI/NRMRL RSEI

Propionaldehyde 92 RSEI/NRMRL RSEI

Propoxur 92 RSEI/NRMRL RSEI

Propylene oxide 92 RSEI/NRMRL RSEI

Propylene (Propene) 99 RSEI/NRMRL RSEI

Propyleneimine 75 RSEI/NRMRL RSEI

Pyridine 95 NRMRL CWT

Quinoline 76 RSEI/NRMRL RSEI

Quinone 52 RSEI/NRMRL RSEI

Quintozene 90 RSEI/NRMRL RSEI

Quizalofop-ethyl 98 RSEI/NRMRL RSEI

Resmethrin 99.99 RSEI/NRMRL RSEI

Saccharin (manufacturing) 75 RSEI/NRMRL RSEI

Safrole 67 RSEI/NRMRL RSEI

sec-Butyl alcohol 92 RSEI/NRMRL RSEI

Selenium compounds 34 NRMRL 5 CWT

Selenium 34 NRMRL 5 CWT

Sethoxydim 84 RSEI/NRMRL RSEI

Silver 88 50 POTW - 10 X ML CWT

Silver compounds 88 50 POTW - 10 X ML CWT

Simazine 23 RSEI/NRMRL RSEI

Sodium nitrite 1.85 RSEI/NRMRL RSEI

Sodium dimethyldithiocarbamate 77 RSEI/NRMRL RSEI

Sodium azide 2 RSEI/NRMRL RSEI

Sodium o-phenylphenoxide 95 RSEI/NRMRL RSEI

Sodium pentachlorophenate 96 RSEI/NRMRL RSEI

Sodium dicamba 47 RSEI/NRMRL RSEI

Sodium fluoroacetate 75 RSEI/NRMRL RSEI

S,S,S-tributyltrithiophosphate 99.9 RSEI/NRMRL RSEI

Strychnine and salts 2 RSEI/NRMRL RSEI

Styrene oxide 75 RSEI/NRMRL RSEI

Styrene 94 NRMRL CWT

Sulfuric acid 100 RSEI/NRMRL RSEI

Sulfuryl fluoride (Vikane) 2 RSEI/NRMRL RSEI

Sulprofos 99.8 RSEI/NRMRL RSEI

Tebuthiuron 23 RSEI/NRMRL RSEI

Temephos 99.9 RSEI/NRMRL RSEI

Terbacil 46 RSEI/NRMRL RSEI

tert-Butyl alcohol 46 RSEI/NRMRL RSEI
MEMORANDUM

12 August 2005

Page 18

Chemical POTW %

Removal 

Primary Data Source1,2 Secondary Data

Source1

Tetrabromobisphenol-A (TBBPA) RSEI/NRMRL RSEI

Tetrachloroethylene (Perchloroethylene) 85 NRMRL CWT

Tetrachlorvinphos 89 RSEI/NRMRL RSEI

Tetracycline hydrochloride 45 RSEI/NRMRL RSEI

Tetramethrin 99 RSEI/NRMRL RSEI

Thallium 54 NRMRL CWT

Thallium compounds 54 NRMRL CWT

Thiabendazole 49 RSEI/NRMRL RSEI

Thioacetamide 46 RSEI/NRMRL RSEI

Thiobencarb 65 RSEI/NRMRL RSEI

Thiodicarb 75 RSEI/NRMRL RSEI

Thiophanate ethyl 87 RSEI/NRMRL RSEI

Thiophanate-methyl 75 RSEI/NRMRL RSEI

Thiosemicarbazide 45 RSEI/NRMRL RSEI

Thiourea 75 RSEI/NRMRL RSEI

Thiram 75 RSEI/NRMRL RSEI

Thorium dioxide 3 RSEI/NRMRL RSEI

Titanium tetrachloride 2 RSEI/NRMRL RSEI

Toluene 96 NRMRL CWT

Toluene-2,4-diisocyanate 99 RSEI/NRMRL RSEI

Toluene-2,6-diisocyanate 99 RSEI/NRMRL RSEI

Toluenediisocyanate 99 RSEI/NRMRL RSEI

Toxaphene 99 RSEI/NRMRL RSEI

trans-1,3-Dichloropropene 79 RSEI/NRMRL RSEI

trans-1,4-Dichloro-2-butene 80 RSEI/NRMRL RSEI

Triadimefon 52 RSEI/NRMRL RSEI

Triallate 95 RSEI/NRMRL RSEI

Triaziquone 45 RSEI/NRMRL RSEI

Tribenuron methyl 78 RSEI/NRMRL RSEI

Tributyltin fluoride 50 RSEI/NRMRL RSEI

Tributyltin methacrylate 38 RSEI/NRMRL RSEI

Trichlorfon 92 RSEI/NRMRL RSEI

Trichloroacetyl chloride 99.9 RSEI/NRMRL RSEI

Trichloroethylene 87 NRMRL CWT

Triclopyr triethylammonium salt 75 RSEI/NRMRL RSEI

Triethylamine 48 RSEI/NRMRL RSEI

Trifluralin 97 RSEI/NRMRL RSEI

Triforine 76 RSEI/NRMRL RSEI

Triphenyltin chloride 39 RSEI/NRMRL RSEI

Triphenyltin hydroxide 14 RSEI/NRMRL RSEI

Tris(2,3-dibromopropyl)phosphate 99.5 RSEI/NRMRL RSEI

Trypan blue 45 RSEI/NRMRL RSEI

Urethane (Ethyl carbamate) 45 RSEI/NRMRL RSEI

Vanadium 8 50 POTW -2 X ML CWT

Vanadium compounds 8 50 POTW -2 X ML CWT
MEMORANDUM

12 August 2005

Page 19

Chemical POTW %

Removal 

Primary Data Source1,2 Secondary Data

Source1

Vinclozolin 68 RSEI/NRMRL RSEI

Vinyl bromide 95 RSEI/NRMRL RSEI

Vinyl acetate 92 RSEI/NRMRL RSEI

Vinyl chloride 92 RSEI/NRMRL RSEI

Vinylidene chloride (1,1-dichloroethylene) 78 50 POTW/NRMRL

Average3

MPM

Warfarin and salts 3 RSEI/NRMRL RSEI

Xylene (mixed isomers) 96 RSEI/NRMRL RSEI

Zinc compounds 79 50 POTW - 10 X ML CWT

Zinc (fume or dust) 79 50 POTW - 10 X ML CWT

Zineb 98 RSEI/NRMRL RSEI

Notes: 1

Primary data source for determination of POTW removal. EPA did not recalculate these POTW removal

efficiencies. Secondary data source indicates where EPA located the actual value: either RSEI or the record

supporting pretreatment standards for one of the following effluent guideline point source categories:

• CWT – Central Waste Treaters Point Source Category

• I&S – Iron and Steel Point Source Category

• MPM – Metal Products and Machinery Point Source Category

• TEC – Transportation Equipment Cleaning Point Source Category

2

RSEI/NRMRL indicates the removal value came from RSEI model. Based on information received from OPPT on

the RSEI model, removal efficiencies in RSEI were derived from the National Risk Management Research

Laboratory (NRMRL) Treatability Database, Version 5.

3

POTW removals for these chemicals were calculated by averaging POTW and NRMRL data, depending on the

waste stream. See Chapter 12, Table 12-1 of the Final Rule Development Document for Effluent Guidelines for

Metal Products and Machinery (EPA-821-B-03-001).

4

For dioxins and furans, the value for 1,2,3,6,7,8-HPCDF was the only dioxin or furan compound with POTW

removal data in NRMRL; therefore its value was transferred to all dioxins and furans. 5

For the TEC rulemaking, this POTW removal value was transferred from the Pesticides Manual.

50 POTW - 10 X ML - Data are from 50 POTW Study, where influent concentrations are greater than 10 times the

minimum level.

50 POTW - 2 X ML - Data are from 50 POTW Study, where influent concentrations are greater than 2 times the

minimum level.