Plants that Discharge Metal Cleaning Waste to Surface Water or POTW Based on Informat i 3/13/2013

Plant Name EPA Region State

PSEG New Haven Harbor Generating Station 1 CT Algonquin Windsor Locks, LLC 1 CT West Springfield 1 MA NextEra Energy Seabrook LLC 1 NH PSEG Linden Generating Station 2 NJ AES ‐ Somerset 2 NY Far Rockaway Power Station 2 NY Danskammer Generating Station 2 NY Port Jefferson Power Station 2 NY Indeck Corinth Energy Center 2 NY WPS Syracuse Generation, LLC 2 NY EME Homer City Generation L.P. 3 PA Hatfield's Ferry Power Station 3 PA RRI Energy Inc. Portland Generating Station 3 PA Bruce Mansfield Plant 3 PA Yorktown Power Station 3 VA Virginia Electric and Power Company ‐ Gordonsville Power Station 3 VA Mount Storm Power Station 3 WV Albright Power Station 3 WV Philip Sporn 3 WV Harrison Power Station 3 WV Rivesville Power Station 3 WV Widows Creek 4 AL Sanford Plant 4 FL Turkey Point 4 FL Martin 4 FL JEA ‐ St. Johns River Power Park 4 FL Manatee 4 FL A. B. HOPKINS GENERATING STATION 4 FL Putnam 4 FL C D McIntosh Jr. Power Plant 4 FL Plant Jack McDonough 4 GA Plant McManus 4 GA Mid Georgia Cogen 4 GA Big Sandy 4 KY HMP&L Station Two 4 KY Shawnee 4 KY Magnolia Energy 4 MS Buck Steam Station 4 NC Marshall Steam Station 4 NC Cope 4 SCJefferies Generating Station 4 SC Cross Generating Station 4 SC Canadys Station 4 SC Johnsonville 4 TN E.D. Edwards 5 IL Duck Creek Power Plant 5 IL Joliet Station 9 5 IL Merom Generating Station 5 IN General James M. Gavin 5 OH Davis

‐ Besse Nuclear Power Station 5 OH Wisconsin Power and Light ‐ Nelson Dewey Generating Station 5 WI Independence Plant 6 AR KGen Hot Spring LLC 6 AR Entergy Operations, Inc., Waterford 3 S.E.S. 6 LA Big Cajun 2 6 LA Entergy Louisiana, LLC ‐ Ninemile Point Generating Plant 6 LA Seminole Generating Station 6 OK Wilkes 6 TX Sam Bertron 6 TX Frontera Energy Center 6 TX Lewis Creek 6 TX Louisa Generating Station 7 IA Riverside Generating Station 7 IA Interstate Power and Light ‐ Sutherland Generating Station 7 IA George Neal South 7 IA Fort Dodge Station 7 KS Tecumseh Energy Center 7 KS Lake Road Generating Station 7 MO Hawthorn Generating Station 7 MO Dave Johnston Plant 8 WY Moss Landing 9 CA Contra Costa Power Plant 9 CA Mandalay Generating Station 9 CA Malburg Generating Station 9 CA Honolulu Generating Station 9 HI Tenaska Ferndale Cogeneration Station 10 WA River Road Generating Plant 10 WAi on Reported to the Steam Electric Survey

MCW Type NPDES Permit Chemical, Nonchemical, and Unknown CT0003760 Chemical CT0026476 Chemical MA0004707 Chemical NH0020338 Chemical NJ0000663 Chemical and Nonchemical NY0104213 Nonchemical NY0005924 Nonchemical ny0006262 Nonchemical NY0005932 Chemical NY0230286 Chemical NY 0231681 Nonchemical PA0235555 Nonchemical PA0002941 Nonchemical PA

‐ 0063606 Nonchemical PA0027481 Chemical and Nonchemical VA0004103 Chemical VA0087033 Chemical and Nonchemical WV0005525 Nonchemical WV0075281 Nonchemical WV0001058 Nonchemical WV0075795 Nonchemical WV0050776 Nonchemical AL0003875 Chemical and Nonchemical FL0001554 Chemical and Nonchemical FL0001562 Chemical and Nonchemical FL0030988 Chemical and Nonchemical FLR05G941 Chemical and Nonchemical FL0032174 Chemical and Nonchemical FL0025518 Chemical FL0032166 Chemical FL0026301 Nonchemical GA0001431 Chemical GA0003794 Chemical GAR000000 Nonchemical KY0000221 Nonchemical KY0001929 Nonchemical KY0004219 Chemical MS0056995 Chemical and Nonchemical NC0004774 Nonchemical NC0004987 Nonchemical SC0045772Nonchemical SC0001091 Nonchemical SC0037401 Nonchemical SC0002020 Nonchemical TN0005444 Nonchemical IL0001970 Nonchemical IL0055620 Nonchemical IL0002216 Nonchemical IN0050296 Chemical and Nonchemical 0IB00006*JD Nonchemical 2IB00011*ID Nonchemical WI

‐ 0002381

‐ 05

‐ 0 Chemical and Nonchemical AR0037451 Chemical AR0049417 Chemical and Nonchemical LA0007374 Chemical and Nonchemical LA0054135 Chemical LA0003093 Unknown OK0000451 Nonchemical TX0062006 Nonchemical TX0006378 Chemical WQ0004051000 Chemical TX0067890 Chemical and Nonchemical 58

‐ 00

‐ 1

‐ 05 Nonchemical 8278101 Nonchemical IA0000108 Nonchemical 97

‐ 00

‐ 1

‐ 06 Chemical KS0079995 Chemical and Nonchemical KS0079731 Nonchemical MO

‐ 0004898 Chemical MO

‐ 0004855 Chemical WY0003115 Chemical and Nonchemical CA0006254 Chemical CA0004863 Chemical CA0001180 Chemical CAS000001 Nonchemical HI0000027 Chemical WA

‐ 003129

‐ 1 Unknown WA00409321 ME ME0000272 Wyman Chemical and Nonchemical

1 NH NH0001465 Merrimack Chemical and Nonchemical

1 MA MA0003654 Brayton Point Chemical and Nonchemical 1 M A MA0004740 Mystic Station Chemical and Nonchemical

1 NH NH0001601 Newington Chemical and Nonchemical 1 CT CT0003263 Millstone Chemical 1 NH NH0020338 Seabrook Chemical

1 NH NH0001473 Schiller Chemical

2 PR PR0001660 PREPA Aguirre Chemical and Nonchemical

2 PR PR0001147 PREPA South Coast Chemical and Nonchemical 4 A L A L0003875 Widows Creek Chemical and Nonchemical 4 A L A L0002879 Barry Steam Chemical and Nonchemical 4 FL FL0030988 Martin Chemical and Nonchemical 4 FL FL0032174 Manatee Chemical and Nonchemical 4 G A GA0001431 Plant Jack McDonough Chemical and Nonchemical 4 G A GA0003794 Plant McManus Chemical and Nonchemical 4 K Y KY0000221 Big Sand y Chemical and Nonchemical 4 K Y KY0004219 Shawnee Nonchemical

4 MS MS0056995 Magnolia Energy Chemical Region State NPDES Permit Plant Name Metal Cleaning Waste Type4 MS MS0000167 Morrow Chemial 4 MS MS0002381 Rex Bown Chemical 4 MS MS000817 Delta Station Chemical 4 NC NC0004774 Buck Steam Station Chemical and Nonchemical 4 NC NC0004987 Marshall Steam Station Chemical and Nonchemical

4 SC SC0045772 Cope Chemical and Nonchemical

4 SC SC0002020 Canadys Station Chemical and Nonchemical 4 SC SC0001091 Jefferies Nonchemial 4 SC SC0001104 Grainge r Nonchemical 4 TN TN0005444 Johnsonville Nonchemical 4 TN TN0005410 Bull Run Chemical and Nonchemical

5 IL IL0002216 Midwest Generation Joliet 9 Nonchemical

5 IL IL0000043 Dynegy Midwest Baldwin Nonchemical

5 IN IN0060950 A merican Electric Power Lawrenceburg Chemical

5 IN IN0050296 Hoosier Energy Merom Chemical and Nonchemical

5 MI MI0001686 Detroit Edison St. Clair Chemical and Nonchemical

5 MI MI0001694 Detroit Edison Marysville Chemical and Nonchemical

5 MN MN0000876 Xcel Energy Black Dog

5 MN MN0000825 Xcel Energy Allen S King Disposed of offsite

5 OH OH0003786 First Energy David-Besse5 OH OH0028762 A merican Electric Power Gavin Chemical

5 WI WI0043583 Wisconsin Energy Pleasant Prairie

5 WI WI0042765 Wisconsin Public Service Corporation Weston 3 and 4

6 AR AR0037451 Entergy – Independence Chemical and Nonchemical
6 AR AR0049417 Entergy – Hot Springs Disposed of offsite

6 LA LA0054135 Big Cajun II

6 LA LA0003093 Entergy Ninemile Chemical and Nonchemical

6 LA LA0007374 Entergy Waterford 3 Chemical and Nonchemical

6 NM NM0000108 El Paso Electric Chemical and Nonchemical6 OK OK0000451 Seminole Generating Station The metal cleaning waste generated at this facility is incinerated at either the OG&E Sooner plant or the OG&E Muskogee plant.

6 OK OK0044181 Calpine OnetaTX0074438 Texas Municipal Power Agency

TX0127256 Sandy Creek Energy

8 WY Dave Johnston Plant NA

9 CA Moss Landing Power Plant Chemical and Nonchemical9 CA Mandalay Generating Station Chemical and Nonchemical

9 HI Honolulu Generating Station Chemical and NonchemicalNo NA NA

No NA NA

No NA NA No N A N A

LVW No mention of Jordan Memo NA; only chemical N A N A NA; only chemical N A N A
NA; only chemical NA NA

Yes LVW The basis for using the low

‐ volume waste subcategory for oil and grease is the best professional judgement of the permit writer. The fact sheet does not reference the 1975 Jordan Memo.

Yes LVW The basis for using the low

‐ volume waste subcategory for oil and grease is the best professional judgement of the permit writer. The fact sheet does not reference the 1975 Jordan Memo. Yes CMCW No basis in fact sheet No MCW No MCW No MCW No MCW No MCW No MCW Yes LVW No basis in fact sheet NA; CMCW is trucked off site. There is no discharge to surface waters. Is there a distinction between chemical cleaning waste and Nonchemical cleaning waste? Is nonchemical cleaning waste permitted with limits for metal cleaning waste or low volume waste? If nonchemical cleaning waste is handled as low volume waste, what is the basis?NA; CMCW is trucked off site. There is no discharge to surface waters. Yes MCW Yes LVW No MCW No MCW NA; CMCW is trucked off site. There is no discharge to surface waters. NA; CMCW is trucked off site. There is no discharge to surface waters. Yes LVW Yes LVW Yes LVW Yes LVW

Disposed of offsite

LVW BPTNA; only chemical

No MCW

No Nonchemical not listed in the low volume wastewater description

No Non chemical metal cleaning wastewaters is listed along with the chemical cleaning wastewater.

No Non chemical metal cleaning wastewaters is listed along with the chemical cleaning wastewater.

No MCWUncertain

UncertainMCW

MCW

NA NA NA

No LVW No mention of Jordan MemoNo LVW No mention of Jordan Memo

No LVW No mention of Jordan MemoThe fact sheet references the definition of metal cleaning (chem and non-chem) at 40 CFR 423.11(d),however, the permit outfall description is “boiler chemical cleaning operations.” Permit limits are ELGbased for Fe and water-quality based for Cu.
Metal cleaning (chem and non-chem) monitoring is required with ELG-based limits for Fe and Cu. It is the same treatment plant and outfall used for other wastestreams including low volume, however, the permit specifies that “when treating chemical and nonchemical metal cleaning wastewaters, the permittee is prohibited from discharging any other wastestream (including low volume) to WTP#1.” The initial chemical clean wastewater from the boiler is hauled for off-site disposal. Remaining metal cleaning (chem and non-chem) are permitted with ELG-based limit for Cu. Fe (also ELG-based limit) is monitored after the metal cleaning waste combines with other wastewaters, including low volume. Fact sheet explains that other wastewaters also contain Fe. Metal cleaning (chem and non-chem) are permitted with ELG mass-based limits. Permit includes Cu and Fe ELG-based limits for chemical metal cleaning waste (expected every 5 yrs). Like Merrimack, the outfall is the same physical location as for low volume waste. 01A – treated wastewater during normal operations 01C- treated wastewater during metal cleaning operations Steam generator chemical cleaning requires ELG-based Cu and Fe limits. Chemical metal cleaning has ELG-based Cu and Fe limits. ELG-based Cu and Fe limits apply to wastewater treatment plant “during boiler chemical cleaning operations only.”

Effluent limitations for Oil and Grease (30 ave, 100 max) and TSS (15 ave, 20 max) limitations are based on Steam Electric Power Generating Point Source Category low volume waste sources effluent guideline (40 CFR 423.12(b)(5) Steam Electric Point Source Category ELG for metal and cleaning wastes, in accordance with BPT). The limitations for Copper (1 ave, 1 max) and Zinc (1 ave, 1 max) are based on Steam Electric Power Generating Point Source Category metal cleaning waste sources effluent guideline in accordance with BAT (40 CFR 423.12(e)(5)).

Effluent limitations for Oil and Grease (30 ave, 100 max) and TSS (15 ave, 20 max) limitations are based on Steam Electric Power Generating Point Source Category low volume waste sources effluent guideline (40 CFR 423.12(b)(5) Steam Electric Point Source Category ELG for metal and cleaning wastes, in accordance with BPT). The limitations for Copper (1 ave, 1 max) and Zinc (1 ave, 1 max) are based on Steam Electric Power Generating Point Source Category metal cleaning waste sources effluent guideline in accordance with BAT (40 CFR 423.12(e)(5)). TSS and O&G limits are based on EG for LVW EG limits for TSS, O&G, Cu and Fe EG limits for TSS, O&G, Cu and Fe EG limits for TSS, O&G, Cu and Fe EG limits for TSS, O&G, Cu and Fe EG limits for TSS, O&G, Cu and Fe EG limits for TSS, O&G, Cu and Fe EG limits for TSS and O&G for LVW Limits and Other CommentsEG for TSS, O&G, Cu and Fe EG for TSS and O&G EG for TSS, O&G, Cu and Fe EG for TSS, O&G, Cu and Fe

EG for TSS and O&G EG for TSS and O&G EG for TSS and O&G EG for TSS and O&G Has non-chemical cleaning waste stream. Cites BPT ELG requirements and includes copper and iron limits. A pplication lists non-chemical cleaning wastes as intermittent discharge from outfall 001, but does not describe specific cleaning wastes. Permit and Factsheet do not identify specific wastes, but acknowledge non-chemical cleaning wastes from Outfall 001. However, no limits for iron and copper are included.
All chemical metal cleaning waste is disposed of offsite.
Metal cleaning waste is identified as being discharged from Outfall 001. Outfall 101 is specifically for low volume waste and metal cleaning waste and has copper and iron limits. A combined waste stream allocation was not prepared even though there is the potential to dilute the metal cleaning waste with the low volume waste. The fact sheet points to the BPT requirements.
Outfall 001 identifies chemical and non-chemical metal cleaning wastes as being discharged through this outfall, but does not contain copper and iron limits. Outfall 001B does have the limits consistent with BPT for metal cleaning wastes, however it specifically states that those limits only need to be met when chemical metal cleaning wastes are being discharged and prior to combination with other wastestreams. Plant is not currently operating, but Outfall 001 identifies chemical and non-chemical metal cleaning wastes as being discharged through this outfall, but does not contain copper and iron limits. Outfall 001B does have the limits consistent with BPT for metal cleaning wastes, however it specifically states that those limits only need to be met when chemical metal cleaning wastes are being discharged and prior to combination with other wastestreams.

Permit does not specifically limit metal cleaning wastes, but has iron and copper limits at the ash pond discharge. Footnote states that “discharge of any discrete metal cleaning wastewater types to the ash pond system shall not occur just prior to or during a discharge from the ash pond system via SD005. Chemical metal cleaning wastes shall not be discharged to the ash pond system except as a secondary protection in the event of a failure or a leak. The ash pond discharges to Black Dog Lake which is a cooling pond (not WOTUS) adjacent to the Minnesota River but there is a consistent discharge from the cooling pond to the Minnesota River. The permit prohibits the discharge of metal cleaning wastes to the hold-up pond and requires them to be collected and transported offsite. The permit and fact sheet do not discuss or limit metal cleaning wastes. The permit identifies an internal outfall for low volume waste, but does not provide a detailed description of the waste streams comprising that discharge. The flow diagram indicates that there is the potential for metal cleaning wastes from the facility.The permit has specific procedures for chemical metal cleaning waste including limits for copper and iron. Non-chemical metal cleaning wastes were not mentioned.

The permit has an internal outfall for metal cleaning wastes comprised of air preheater wash water, boiler cleaning waste water and other low volume wastes. Limits for copper and iron are included, but only apply when metal cleaning wastewater is being discharged.

The permit has limits at outfall 102 which discharges from the metal wastewater treatment pond that includes wastewaters from boiler water acid/caustic demineralizer regeneration, reverse osmosis membrane cleaning, and non-chemical metal surface cleaning that are equalized and treated for metals precipitation, suspended solids removal and pH control. It has the copper and iron limitations. Separate, lined pond is used to store metal treatment wastewater. A common pump station is used to draw water for batch treatment to remove metals and suspended solids. The wastewater treatment system is designed to remove iron, copper and suspended solids. The wastewater treatment system consists of hydroxide precipitation of metals at pH 10.8 followed by solids separation in two solids contact clarifiers. The clarified effluent is polished by sand filtration to capture any remaining metallic hydroxide precipitates, and then pH (acid) adjusted prior to discharge to the outfall 002 piping system. Effluent that does not meet the iron, copper, total suspended solids, oil and grease, and pH national discharge standards for this industrial category can be recycled (with the sand filter backwash) back to the metal treatment pond.

Non chemical metal cleaning waste is handled as metal cleaning waste. Internal Outfall 01F has limits for Cu and Fe 1.0 / 1.0 mg/l (Mthly Avg / Daily Max). Wastestream later commingled with another Internal Outfall 01H– low volume wastestream – TSS 30 / 50 mg/l, O&G 15 / 20 mg/l (Mthly Avg / Daily Max). Discharge of metal cleaning wastestreams is prohibited. Wastestreams are collected, characterized and disposed of off site.

Metal cleaning wastewater is commingled with other low volume wastewater. Nonchemical metal cleaning wastewaters are not listed in the low volume wastewater description.

Chemical and nonchemical metal cleaning wastewaters are commingled into one outfall.

Chemical and nonchemical metal cleaning wastewaters are commingled into one outfall.

Metal cleaning wastestreams treated as internal outfalls 106, 107 and 108. The limits are TSS 30 / 100 mg/l, O&G 15 / 20 mg/ l, Ttl Cu 1.0 / 1.0 mg/l, Ttl Fe 1.0 / 1.0 mg/l (Mthly Avg / Daily Max)The ODEQ defines in fact sheet as follows: b. The term “chemical metal cleaning waste” means any wastewater resulting from the cleaning of any metal process equipment with chemical compounds, including, but not limited to, boiler tube cleaning. d. The term “low volume waste sources” means, taken collectively as if from one source, wastewater from all sources except those for which specific limitations are otherwise established in this part. Low volume waste sources include, but are not limited to: wastewaters from wet scrubber air pollution control systems, ion exchange water treatment systems, water treatment evaporator blowdown, laboratory and sampling streams, boiler blowdown, floor drains, cooling tower basin cleaning wastes, and recirculating house service water systems. Sanitary and air conditioning wastes are not included. e. The term “metal cleaning waste” means any wastewater resulting from the cleaning (with or without chemical cleaning compounds) any metal process equipment including, but not limited to, boiler tube cleaning, boiler fireside cleaning, and air preheater cleaning.

BPT LVW Limitations – Outfall 002 Oil and Grease: Monthly Average 15 mg/l, Daily Maximum 20mg/l Total Suspended Solids: Monthly Average 30 mg/l, Daily Maximum 100 mg/l pH: Between 6.5 s.u. – 9.0 s.u. BPT Effluent Limitations for Low Volume Wastes Total Suspended Solids (TSS): 30 ave/100 max Oil and Grease: 15 ave/20 max

Chemical metal cleaning waste generated at the facility includes wastewater generated from washing combustion turbine blades to remove particles that may influence the performance efficiency of the turbines. Turbine blade washing is done at least twice a year. This wastewater is monitored at the IMPs 02A and 03A before it is trucked off site or passed to the clean water sump.
b. The term “chemical metal cleaning waste” means any wastewater resulting from the cleaning of any metal process equipment with chemical compounds, including, but not limited to, boiler tube cleaning. d. The term “low volume waste sources” means, taken collectively as if from one source, wastewater from all sources except those for which specific limitations are otherwise established in this part. Low volume waste sources include, but are not limited to: wastewaters from wet scrubber air pollution control systems, ion exchange water treatment systems, water treatment evaporator blowdown, laboratory and sampling streams, boiler blowdown, floor drains, cooling tower basin cleaning wastes, and recirculating house service water systems. Sanitary and air conditioning wastes are not included.

NSPS Effluent Limitations for Low Volume waste – Total Suspended Solids – Monthly Avg 30.0 mg/l, Daily Max 100.0 mg/l Oil and Grease Monthly Avg 15.0 mg/l, Daily Max 20.0 mg/l NSPS Effluent Limitations Applying to Chemical Metal cleaning waste – Total Suspended Solids Monthly Avg 30.0 mg/l , 100.0 mg/l Oil and Grease Monthly Avg 15.0 mg/l , Daily Max 20.0 mg/l Copper, total Monthly Avg 1.0 mg/l, Daily Max 1.0 mg/l Iron, total Monthly Avg 1.0 mg/l, Daily Max 1.0 mg/lMetal cleaning waste is treated via settling and neutralization prior to discharge. The limits are based on ELGs for this type of waste stream: TSS: 30mg/l DA, 100 mg/l DM Oil & Grease: 15 mg/l DA, 20 mg/l DM Iron (T): 1.0 mg/l DA and DM Copper (T): 1.0 mg/l DA and DM. Based on information in the permit package and spreadsheet, the metal cleaning waste stream at the plant can also be considered nonchemical metal cleaning waste; the wastestream is a result of periodic high pressure washing of air preheater baskets and boiler tube cleaning. Metal cleaning waste is generated from boilershed wash. The waste stream is routed and transported off site for disposal or treated and discharged via outfall 101. Limits are based on current steam electric ELGs for this type of waste stream. TSS: 30mg/l DA, 100 mg/l DM Oil & Grease: 15 mg/l DA, 20 mg/l DM Iron (T): 1.0 mg/l DA and DM Copper (T): 1.0 mg/l DA and DM. Metal cleaning waste is treated via settling and neutralization prior to discharge. The limits are based on ELGs for this type of waste stream: TSS: 30mg/l DA, 100 mg/l DM Oil & Grease: 15 mg/l DA, 20 mg/l DM Iron (T): 1.0 mg/l DA and DM Copper (T): 1.0 mg/l DA and DM. Based on information in the permit package and spreadsheet, the metal cleaning waste stream at the plant can also be considered nonchemical metal cleaning waste; the wastestream is a result of periodic high pressure washing of air preheater baskets and boiler tube cleaning. Metal cleaning waste is generated from boilershed wash. The waste stream is routed and transported off site for disposal or treated and discharged via outfall 101. Limits are based on current steam electric ELGs for this type of waste stream. TSS: 30mg/l DA, 100 mg/l DM Oil & Grease: 15 mg/l DA, 20 mg/l DM Iron (T): 1.0 mg/l DA and DM Copper (T): 1.0 mg/l DA and DM.

Low Volume Waste limits: TSS 30/100 mg/l (ave/max) Oil and Grease 15/20 mg/l (ave/max)
Chemical Metal Cleaning Waste limits: TSS 30/100 mg/l (ave/max) Oil and Grease 15/20 mg/l (ave/max) Copper 1/1 mg/l (ave/max) Iron 1/1 mg/l (ave/max)Low Volume Waste limits: TSS 30/100 mg/l (ave/max) Oil and Grease 15/20 mg/l (ave/max)
Chemical Metal Cleaning Waste limits (Metal Cleaning Waste is defined as "any wastewater resulting from chemical cleaning of any metal process equipment including, but not limited to, boiler tube, boiler fireside, and air preheaters."): TSS 30/100 mg/l (ave/max) Oil and Grease 15/20 mg/l (ave/max) Copper 1/1 mg/l (ave/max) Iron 1/1 mg/l (ave/max)

Low Volume Waste limits: TSS 30/100 mg/l (ave/max) Oil and Grease 15/20 mg/l (ave/max)
Metal Cleaning Waste limits: TSS 30/100 mg/l (ave/max) Oil and Grease 15/20 mg/l (ave/max) Copper 1/1 mg/l (ave/max) Iron 1/1 mg/l (ave/max) 56

Total Number from Review Excluding Plants with Chemical Cleaning Wastes Only

Total Number of Permits Reviewed with with the Potential for Nonchemical Metal Cleaning Wastes Number of Permits that are Zero Discharge or have Copper & Iron Limits Number of Permits that Do Not Have Copper & Iron Limits Number of Permits that Do Not Have Enough Information to be EvaluatedCan't Evaluate Cleaning Type Reason Chemical Cleaning Wastes only Zero Discharge Chemical plus Nonchemical Metal Cleaning Wastes?

1

1

1 1

1 1 1

1

1

1 1 1 1 1 1 1 1

1 11 1 1 1 1 1

1 1

1 1

1

1 1

1

1

1

1 No discussion of

cleaning types

1

1 No description

provided.1

1

1

1

1

1 Conflicting reports of

where the nonchemical wastewater goes

1

1

11

11

1

1 No information

provided

11

1 4 11 9 31

4 0 4 31

45 29 64% 12 27%

4 9%Nonchemical Metal Cleaning Wastes? Low-Volume Waste Limits? Metal Cleaning Waste Limits? Chemical Metal Cleaning Waste Limits?

1

1

1 1

1 1 1

1

1

1 1 1 1 1 1 1 1 1 1 Evaluation of the Permit Review Results1 1 1 1

1 1 1 1 1 1 1

1 1

1 1

1

1

1

11

1

1

1

111

1

11

1 6 13 24 6

6 12 23 2Notes

Combined with other streams prior to outfall. Initial chemical metal cleaning waste is hauled offsite, all other residuals and cleaning wastes combined and discharged

Combined outfall.Limit is to ash pond. No discharges of metal cleaning waste to ash pond while ash pond is discharging to adjacent cooling pond. Cooling pond discharges to Minnesota River