OMB Control Number: 2040-0281 Plant ID: Insert Plant ID

Approval Expires: 05/31/2013 Plant Name: Insert Plant Name

Section Title Tab Name

Part D Instructions Part D Instructions

Part D Section 1

Part D Section 2

Wastewater Treatment Diagram Part D Section 3.1

Wastewater Treatment Wastewater Flows Part D Section 3.2

Part D Section 4.1

Closed Pond/Impoundment Unit Information Part D Section 4.2

Wastewater Treatment Unit Information - System Level Part D Section 5.1

Wastewater Treatment System Chemical Addition Part D Section 5.2

Part D Section 6.1

Part D Section 6.2

Part D Comments Part D Comments

Steam Electric Questionnaire Code Tables Code Tables

Pond/Impoundment System and Wastewater 

 Treatment System Equipment

Plant Pond/Impoundment Systems and Wastewater

 Treatment Systems

Pond/Impoundment System and Wastewater 

 Treatment System Identification

Steam Electric Questionnaire 

PART D - POND/IMPOUNDMENT SYSTEMS AND OTHER WASTEWATER TREATMENT 

OPERATIONS

Table of Contents

Active/Inactive/Open and Planned 

 Pond/Impoundment Unit Information

Pond/Impoundment System and Wastewater 

 Treatment System Costs

Approved: May 20, 2010
Steam Electric Questionnaire Part D. Instructions

Plant ID: Insert Plant ID

Plant Name: Insert Plant Name

PART D. POND/IMPOUNDMENT SYSTEMS AND OTHER WASTEWATER 

TREATMENT OPERATIONS

INSTRUCTIONS

Part D requests information about all ponds/impoundments used (or planned to be used 

or under construction/installation by December 31, 2020) for the storage, treatment, 

and/or disposal of process wastewater, residues, or by-products (or sludges or water 

streams containing the residues or by-products) from the combustion of coal, petroleum 

coke, or oil, including but not limited to fly ash, bottom ash, boiler slag, or flue gas 

emission control residues. Additionally, Part D requests information about wastewater 

treatment systems, other than pond/impoundment systems, for the treatment of 

wastewaters from ash handling or FGD operations that are located at the plant or are 

planned to be located at the plant. Complete Part D if you operate one or more systems, 

or if you are currently constructing/installing, or planning to construct/install one or more 

systems by December 31, 2020.

Refer to the following definitions throughout Part D.

A “wastewater treatment unit ” is defined as a unit operation used to remove pollutants 

from process wastewater. Wastewater treatment units include, but are not limited to: 

ponds/impoundments, chemical precipitation, pH adjustment, clarification, biological 

reactor, thickeners, filters, and constructed wetlands.

NOTE: If a pond/impoundment unit (as defined in Section 4.1) is part of a broader 

“wastewater treatment system” containing non-pond units (e.g., a 

pond/impoundment unit in a biological wastewater treatment system), it is not 

considered part of a pond/impoundment system.

A "pond/impoundment" is defined as a natural topographic depression, man-made 

excavation, or diked area formed from earthen materials or man-made materials or a 

combination of them, which is designed to hold an accumulation of liquid process 

wastes or process wastes containing free liquids, and which is not an injection well. 

Examples of ponds/impoundments include holding, storage, settling, and aeration pits, 

ponds, and lagoons. It does not include building sumps and outdoor collection/transfer 

concrete basins.

A “pond/impoundment system ” is defined as a system consisting of one or more 

ponds/impoundments.

A “wastewater treatment system ” is defined as a combination of one or more 

“wastewater treatment units”, other than ponds/impoundments, designed to achieve 

wastewater treatment.

Approved: May 20, 2010
Steam Electric Questionnaire Part D. Instructions

Use the Part D Comments tab to do the following: provide additional information as 

requested in certain questions within Part D; indicate atypical data (e.g., if 2009 

information is not representative of normal operations); and note methods used to make 

best engineering estimates in the event that exact data are not available.

Throughout Part D, information is requested for pond/impoundment and wastewater 

treatment units and systems that are under construction/installation, or planned to be 

under construction/installation by December 31, 2020. Provide design information, or 

best engineering estimates as necessary, for these planned systems/units. Additionally, 

indicate “NA” if the information requested is not applicable for planned systems/units 

(e.g., a question that requests flow rate data for year 2009).

As you are completing the electronic form, note the following: When you enter your plant 

name and plant ID on the Part D Table of Contents tab, all name and ID fields 

throughout Part D will automatically populate. Refer to the overall questionnaire 

instructions, the glossary, and the acronym list for assistance with completing Part D. 

Please provide all free response answers in the highlighted yellow areas. Throughout 

Part D, you may need to make copies of certain sections/questions. Instructions are 

provided throughout Part D regarding making copies. Note that pond/impoundment 

system (and unit) and wastewater treatment system ID's must be populated on the 

copied tab or section, located in the upper right corner under "Plant ID" and "Plant 

Name", in order to correlate the requested information with the pond/impoundment or 

wastewater treatment system.

Approved: May 20, 2010
Steam Electric Questionnaire Part D. Pond/Impoundment Systems and Other Wastewater Treatment Operations

Plant ID: Insert Plant ID

Plant Name: Insert Plant Name

Part: D

Section Title:

CBI? D1-1.

CBI? D1-2.

 

 If you answered "No" to both Questions D1-1 and D1-2, do NOT complete the remainder of 

 Part D. Skip to the next Questionnaire Part. Otherwise, continue to Part D Section 2.

 

STOP!

1. Plant Pond/Impoundment Systems and Wastewater Treatment Systems

Do you operate OR plan to operate (or begin construction/installation of) by December 31, 2020 any wastewater treatment systems, other than 

pond/impoundment systems, for the treatment of process wastewaters from ash handling or FGD operations?

 

Have you used, do you use, OR do you plan to use (or begin construction/installation of) by December 31, 2020 any ponds/impoundments for the 

storage, treatment, and/or disposal of process wastewater , residues , or by-products (or sludges or water streams containing the residues or byproducts) from the combustion of coal, petroleum coke, or oil, including but not limited to fly ash , bottom ash , boiler slag, or flue gas emission 

control residues? 

Note: This includes systems located on non-adjoining property that are under the operational control of the plant.

Note: This includes ponds/impoundments located on non-adjoining property that are under the operational control of the plant.

Yes

Yes

No

Yes

Yes

No

D-1 Approved: May 20, 2010
Steam Electric Questionnaire Part D. Pond/Impoundment Systems and Other Wastewater Treatment Operations

Plant ID: Insert Plant ID

Plant Name: Insert Plant Name

Part: D

Section Title:

 Instructions:

CBI? D2-1.

 (Continue) 

CBI? D2-2. 

CBI? D2-3. 

 (Provide a copy of the summary/report)

 (Continue)

Provide a description of the pilot- or full-scale study. Note the types of treatment technologies studied and the analytes measured in influent to and/or effluents from the 

wastewater treatment system.

 (Skip to Question D2-4)

2. Pond/Impoundment System and Wastewater Treatment System Identification

Complete Section 2 (Questions D2-1 through D2-7) for pond/impoundment systems and/or wastewater treatment systems that the plant operates and/or plans to operate 

(or begin construction/installation of) by December 31, 2020, including those located on non-adjoining property, for the treatment of process wastewaters from ash 

handling or FGD operations. Please provide all free response answers in the highlighted yellow areas.

Has the plant been involved with any ash or FGD wastewater treatment studies (pilot- or full-scale), including studies on pond/impoundment systems, since 2000?

Are any of these studies ongoing? 

Was a summary and/or report describing/documenting the pilot- or full-scale study prepared (including internal and published reports)?

Yes

Yes

Yes

Yes

Yes

No

Yes

No

D-2 Approved: May 20, 2010
Steam Electric Questionnaire Part D. Pond/Impoundment Systems and Other Wastewater Treatment Operations

CBI? D2-4.

CBI? D2-5.

 (Continue)

CBI? D2-6.

 (Continue)

List these pond/impoundment systems in Table D-1. For each pond/impoundment system, EPA assigned a number (e.g., POND-1, POND-2) in Table D-1, which will be 

used throughout the remainder of the survey. In the "Plant Designation" column, provide the plant's name for each pond/impoundment system. In the "Individual 

Ponds/Impoundments Included in the Pond System" column, identify all pond/impoundment units from Table A-4 that are included in the pond system.

Do you operate OR plan to operate (or begin construction/installation of) by December 31, 2020 any pond/impoundment systems, including those located on nonadjoining property, for the treatment of process wastewaters from ash handling or FGD operations? 

Do you operate OR plan to operate (or begin construction/installation of) by December 31, 2020 any systems, including those located on non-adjoining property, for the 

treatment of process wastewaters from ash handling or FGD operations?

 (Skip to Question D2-7)

 (Skip to Section 4.1)

List any ash or FGD wastewater treatment technologies that have been studied by the plant that are not covered by Questions D2-1 through D2-3 (e.g., those that have 

been studied in bench-scale studies).

NOTE: Do NOT include a pond/impoundment unit in Table D-1 if the pond/impoundment unit is or is planned to be part of a broader wastewater treatment 

system containing non-pond wastewater treatment units (e.g., pond/impoundment unit in a biological wastewater treatment system).

Yes

Yes

No

D-3 Approved: May 20, 2010
Steam Electric Questionnaire Part D. Pond/Impoundment Systems and Other Wastewater Treatment Operations

Pond/ Impoundment 

System ID

Year Initially Brought 

Online Plant Designation

POND-1

POND-2

POND-3

POND-4

POND-5

POND-6

POND-7

POND-8

POND-9

POND-10

Individual Pond/Impoundments (Identified in Table A-4) Included in the 

Pond/Impoundment System 

Table D-1. Plant Pond/Impoundment Systems

Active/Inactive/Open Pond/Impoundment Systems

Yes

Yes

No

Yes

Yes

No

D-4 Approved: May 20, 2010
Steam Electric Questionnaire Part D. Pond/Impoundment Systems and Other Wastewater Treatment Operations

RET-POND-1

RET-POND-2

RET-POND-3

RET-POND-4

RET-POND-5

POND-A

POND-B

POND-C

CBI? D2-7.

 (Continue)

Note that "Approximate Length of Piping from FGD Scrubber System" refers to the length of piping from the FGD solids separation overflow storage tank (or FGD 

scrubber absorber if no FGD solids separation) to the beginning of the FGD wastewater treatment system. "Approximate Length of Piping to Subsequent Treatment or 

Discharge" refers to the length of piping from the end of the FGD wastewater treatment system to either the beginning of the subsequent treatment system or the 

wastewater discharge point, 

as appropriate. 

Planned Pond/Impoundment Systems

Retired/Closed Pond/Impoundment Systems

Do you operate OR plan to operate (or begin construction/installation of) by December 31, 2020 any wastewater treatment systems, including those located on nonadjoining property, other than pond/impoundment systems for the treatment of process wastewaters from ash handling or FGD operations?

List these wastewater treatment systems in Table D-2. For each wastewater treatment system, EPA assigned a number (e.g., W WT-1, WWT-2) in Table D-2, which will 

be used throughout the remainder of the survey. In the “Plant Designation” column, provide the plant’s name for each wastewater treatment system. As an example, if a 

plant operates a chemical precipitation FGD wastewater treatment system that discharges to an ash pond/impoundment system (as shown in EPA example diagrams 

EPA_D-1 and EPA_D-2 located at the bottom of Part D Section 3.1) the FGD wastewater treatment system should be identified in Table D-2 (e.g., as W WT-1) and the 

ash pond/impoundment system should have been previously identified in Table D-1 (e.g., as POND-1).

 (Skip to Section 3.1)

SPD - 1 SPD - 3 SPD 

SPD - 2 SPD - 4 SPD 

SPD - 1 SPD - 3 SPD 

SPD - 2 SPD - 4 SPD 

SPD - 1 SPD - 3 SPD 

SPD - 2 SPD - 4 SPD 

SPD - 1 SPD - 3 SPD 

SPD - 2 SPD - 4 SPD 

SPD - 1 SPD - 3 SPD 

SPD - 2 SPD - 4 SPD 

SPD - 1 SPD - 3 SPD 

SPD - 2 SPD - 4 SPD 

SPD - 1 SPD - 3 SPD 

SPD - 2 SPD - 4 SPD 

SPD - 1 SPD - 3 SPD 

SPD - 2 SPD - 4 SPD 

SPD - 1 SPD - 3 SPD 

SPD - 2 SPD - 4 SPD 

SPD - 1 SPD - 3 SPD 

D-5 Approved: May 20, 2010
Steam Electric Questionnaire Part D. Pond/Impoundment Systems and Other Wastewater Treatment Operations

Approximate 

Length of Piping 

from FGD 

Scrubber System 

(ft) 

Approximate 

Length of Piping 

to Subsequent 

Treatment or 

Discharge (ft)

WWT-1

WWT-2

WWT-3

WWT-4

WWT-5

WWT-6

WWT-A

WWT-B

WWT-C

Treatment System Footprint 

(ft2 Plant Designation )

FGD Wastewater Treatment 

Year Initially Brought On 

Line

Wastewater 

Treatment System ID

Operating Wastewater Treatment Systems

Planned Wastewater Treatment Systems

Table D-2. Plant Wastewater Treatment Systems

SPD - 2 SPD - 4 SPD 

RET SPD - 1 RET SPD - 3

RET SPD - 2 RET SPD - 4

RET SPD - 1 RET SPD - 3

RET SPD - 2 RET SPD - 4

RET SPD - 1 RET SPD - 3

RET SPD - 2 RET SPD - 4

RET SPD - 1 RET SPD - 3

RET SPD - 2 RET SPD - 4

RET SPD - 1 RET SPD - 3

RET SPD - 2 RET SPD - 4

SPD - A SPD - C

SPD - B SPD - D

SPD - A SPD - C

SPD - B SPD - D

SPD - A SPD - C

D-6 Approved: May 20, 2010
Steam Electric Questionnaire Part D. Pond/Impoundment Systems and Other Wastewater Treatment Operations

Plant ID: Insert Plant ID

Plant Name: Insert Plant Name

Pond/Impoundment System ID or Wastewater Treatment System ID: Insert System ID

Part: D

Section Title: 3.1. Wastewater Treatment Diagram

 Instructions:

CBI? D3-1.

Complete Section 3.1 (Question D3-1) for each pond/impoundment system or wastewater treatment system identified in Table D-1 

and Table D-2, including planned systems, systems under construction/installation, or planned to be under construction/installation by

December 31, 2020. Enter the pond/impoundment system ID or wastewater treatment system ID in the yellow highlighted space 

provided above (use the pond/impoundment system ID or wastewater treatment system ID assigned in Table D-1 and Table D-2).

Make a copy of Section 3.1 for each pond/impoundment system or wastewater treatment system identified in Table D-1 and Table D-2 

using the "Copy Section 3.1" button below.

Attach a block diagram that shows the pond/impoundment system or wastewater treatment system operations, the process 

wastewaters that currently enter or are planned to enter the pond/impoundment system or wastewater treatment system, and the 

ultimate destinations of the pond/impoundment system or wastewater treatment system effluent(s). Specific instructions for the diagram 

are provided in the checklist below. The diagram should have a similar level of detail as EPA’s example diagrams, EPA_D-1 and 

EPA_D-2.

NOTE: You may use an existing diagram, such as a water balance diagram included in the plant’s NPDES Form 2C, and mark 

the additional required information on the diagram by hand. 

Provide as many diagrams as necessary to convey the information requested in the checklist below. Number each block diagram in the 

upper right corner; the first block diagram should be numbered D-1, the second D-2, etc. Include the plant name, plant ID, and 

pond/impoundment system ID or wastewater treatment system ID in the upper right hand corner of the diagram. 

Copy Section 3.1

Yes

D-7 Approved: May 20, 2010
Steam Electric Questionnaire Part D. Pond/Impoundment Systems and Other Wastewater Treatment Operations

Mark the boxes below to verify that you have completed each checklist item...

If applicable, use EPA-assigned numbers from Part A or B (e.g., FGD-1) to label process operations . If a process operation 

does not have an EPA-assigned number (e.g., boiler, air preheater), use the plant-designated name for the process operation. 

When sources or destinations are not shown on the diagram (i.e., the stream is entering from a location not shown on the 

diagram), describe the source or destination and add the block diagram number, when appropriate, where the stream's previous 

location can be seen. Use codes from the code tables on the "Code Tables" tab provided at the end of this workbook.

Identify the final, general destination of the treated process wastewater and waste streams (e.g., treated process wastewater 

effluent to POTW or surface waters; solid wastes to on- or off-site destinations). Use codes from code tables on the "Code 

Tables" tab provided at the end of this workbook, when applicable.

Indicate, as appropriate, where treated process wastewater is reused or recycled within the plant (e.g., reuse of settling 

pond/impoundment water as fly ash sluice).

Include the average annual (2009) flow rates for influent and effluent streams from the wastewater treatment system on the 

diagram (in gpm or gpd). For planned pond/impoundment systems and wastewater treatment systems, provide the design flow 

rates for the system. Note that these should be the same flow rates that are entered into Tables D-3 and D-4 in Questions D3-2 

and D3-3. If the actual number of days of operation for 2009 is not known, the total annual flow may be divided by 365 days and 

a comment added to the Comments page. If the process wastewater stream is intermittent, provide amount and frequency; for 

example “100 gal, twice/day, 100 dpy” or “1000 gpm, 4 hpd, 365 dpy”. For sludges, provide amount in tpd.

Include NPDES permit outfall numbers, if applicable.

Indicate where chemical addition occurs (i.e., into or between which wastewater treatment units). For pond/impoundment 

wastewater treatment units, indicate and note on the diagram where within or near the pond/impoundment the chemical is added 

(e.g., within the pond/impoundment near the process wastewater influent point, within the pond/impoundment near the effluent, 

in the effluent/discharge canal). The chemicals indicated should correspond to the chemicals listed in Table D-7 and Table D-13.

Block Diagram Checklist

Include the block diagram number, plant name, plant ID, and pond/impoundment system ID or wastewater treatment system ID 

on the diagram.

Include each pond/impoundment or wastewater treatment unit operation. Show all influent and effluent streams from the units 

and label all influent and effluent streams from the pond/impoundment system or wastewater treatment system using the code 

tables on the "Code Tables" tab provided at the end of this workbook. Note that the "Code Tables" tab provides codes for 

wastewater treatment units that are operated in series and/or in parallel (e.g., in EPA_D-1, Chemical Precipitation Reaction Tank 

1-1 and Chemical Precipitation Reaction Tank 2-1 are in series). Effluent streams may include process wastewater and 

sludges . 

Diagram attached.

D-8 Approved: May 20, 2010
Steam Electric Questionnaire Part D. Pond/Impoundment Systems and Other Wastewater Treatment Operations

Example EPA_D-1. Block Diagram for FGD Wastewater Treatment System

If you believe that the diagram should be treated as confidential, stamp it "Confidential" or write "Confidential" or "CBI" across the top. If 

any diagram is not marked "Confidential", it will be considered nonconfidential under 40 CFR Part 2, Subpart B.

If any of the statements above were not checked, revise the block diagram(s) and ensure all statements have been checked.

Review:

D-9 Approved: May 20, 2010
Steam Electric Questionnaire Part D. Pond/Impoundment Systems and Other Wastewater Treatment Operations

NOTE: The codes used in these diagrams correspond the code tables on the "Code Tables" tab provided at the end of this 

workbook.

Example EPA_D-2. Block Diagram for Ash Pond System

D-10 Approved: May 20, 2010
Steam Electric Questionnaire Part D. Pond/Impoundment Systems and Other Wastewater Treatment Operations

Plant ID: Insert Plant ID

Plant Name: Insert Plant Name

Pond/Impoundment System ID or Wastewater Treatment System ID: Insert System ID

Part: D

Section Title: 3.2. Wastewater Treatment Wastewater Flows

 Instructions:

CBI? D3-2.

200 gpm 10 hpd 365 dpy

Other: OR gpd dpy Other:

175 gpm 24 hpd 365 dpy

Other: OR gpd dpy Other:

gpm hpd dpy

Other: OR gpd dpy Other:

gpm hpd dpy

Other: OR gpd dpy Other:

gpm hpd dpy

Other: OR gpd dpy Other:

gpm hpd dpy

Other: OR gpd dpy Other:

gpm hpd dpy

Other: OR gpd dpy Other:

gpm hpd dpy

Other: OR gpd dpy Other:

gpm hpd dpy

Other: OR gpd dpy Other:

gpm hpd dpy

Other: OR gpd dpy Other:

Note: The examples in Tables D-3 and D-4 are derived from the EPA examples diagrams, EPA_D-1 and EPA_D-2, provided at the bottom of Part D Section 3.1.

Process or Treated Wastewater Average Annual (2009) Wastewater Flow Rate

Example (from EPA_D-1):

Complete Section 3.2 (Question D3-2 and D3-3) for each pond/impoundment system or wastewater treatment system identified in Table D-1 and Table D-2, including planned systems, systems under construction/installation, 

or planned to be under construction/installation by December 31, 2020. Enter the pond/impoundment system ID or wastewater treatment system ID in the yellow highlighted space provided above (use the pond/impoundment 

system ID or wastewater treatment system ID assigned in Table D-1 and Table D-2).

Make a copy of Section 3.2 for each pond/impoundment system or wastewater treatment system identified in Table D-1 and Table D-2 using the "Copy Section 3.2" button below.

Complete a row in Table D-3 for each process wastewater stream or treated wastewater stream that enters this pond/impoundment system or wastewater treatment system. For planned pond/impoundment systems and 

wastewater treatment systems, provide the design flow rates for the system. Use the process and treated wastewater terms provided in the drop down menus. Note that these terms originated from code tables on the "Code 

Tables" tab provided at the end of this workbook.

Table D-3. Pond/Impoundment System or Wastewater Treatment System Influent Flows in 2009

Wastewater Treatment Unit ID

Example (from EPA_D-2):

Yes

Copy Section 3.2

D-11 Approved: May 20, 2010
Steam Electric Questionnaire Part D. Pond/Impoundment Systems and Other Wastewater Treatment Operations

gpm hpd dpy

Other: OR gpd dpy Other:

gpm hpd dpy

Other: OR gpd dpy Other:

gpm hpd dpy

Other: OR gpd dpy Other:

gpm hpd dpy

Other: OR gpd dpy Other:

gpm hpd dpy

Other: OR gpd dpy Other:

gpm hpd dpy

Other: OR gpd dpy Other:

gpm hpd dpy

Other: OR gpd dpy Other:

gpm hpd dpy

Other: OR gpd dpy Other:

gpm hpd dpy

Other: OR gpd dpy Other:

gpm hpd dpy

Other: OR gpd dpy Other:

gpm hpd dpy

Other: OR gpd dpy Other:

gpm hpd dpy

Other: OR gpd dpy Other:

gpm hpd dpy

Other: OR gpd dpy Other:

gpm hpd dpy

Other: OR gpd dpy Other:

gpm hpd dpy

Other: OR gpd dpy Other:

gpm hpd dpy

Other: OR gpd dpy Other:

gpm hpd dpy

Other: OR gpd dpy Other:

gpm hpd dpy

Other: OR gpd dpy Other:

gpm hpd dpy

Other: OR gpd dpy Other:

gpm hpd dpy

Other: OR gpd dpy Other:

gpm hpd dpy

Other: OR gpd dpy Other:

gpm hpd dpy

Other: OR gpd dpy Other:

D-12 Approved: May 20, 2010
Steam Electric Questionnaire Part D. Pond/Impoundment Systems and Other Wastewater Treatment Operations

CBI? D3-3.

*Provide the NPDES permit outfall number of the effluent in the last column of the table, if applicable.

% Moisture

NPDES Permit 

Outfall Number*

Example (from EPA_D-1):

175 gpm 24 hpd 365 dpy NA NA NA

Other: OR NA gpd NA dpy Other: Other:

Example (from EPA_D-1):

NA gpm NA hpd NA dpy NA NA NA

Other: OR 10,000 gpd 365 dpy Other: Other:

Example (from EPA_D-2):

NA gpm NA hpd NA dpy 500 30 NA

Other: OR NA gpd NA dpy Other: Other:

Example (from EPA_D-2):

5,000 gpm 24 hpd 365 dpy NA NA NA

Other: OR NA gpd NA dpy Other: Other:

Example (from EPA_D-2):

1,175 gpm 24 hpd 365 dpy NA NA 001

Other: OR gpd dpy Other: Other:

gpm hpd dpy

Other: OR gpd dpy Other: Other:

gpm hpd dpy

Other: OR gpd dpy Other: Other:

gpm hpd dpy

Other: OR gpd dpy Other: Other:

gpm hpd dpy

Other: OR gpd dpy Other: Other:

gpm hpd dpy

Other: OR gpd dpy Other: Other:

gpm hpd dpy

Other: OR gpd dpy Other: Other:

gpm hpd dpy

Other: OR gpd dpy Other: Other:

gpm hpd dpy

Other: OR gpd dpy Other: Other:

gpm hpd dpy

Other: OR gpd dpy Other: Other:

Complete a row in Table D-4 for each treated wastewater stream or sludge stream that exits this pond/impoundment system or wastewater treatment system (i.e., streams that are discharged , recycled , or disposed). For 

planned pond/impoundment systems and wastewater treatment systems, provide the design flow rates for the system. Use the treated wastewater, wastewater treatment unit, and destination terms provided in the drop down 

menus. Note that these terms originated from code tables on the "Code Tables" tab provided at the end of this workbook.

Final Destination

Treated Wastewater Average Annual (2009) Wastewater Flow Rate Wastewater Treatment Unit ID

Solids and Sludge

Amount (tpd or gpm) Destination

Table D-4. Pond/Impoundment System or Wastewater Treatment System Effluent Flows in 2009

D-13 Approved: May 20, 2010
Steam Electric Questionnaire Part D. Pond/Impoundment Systems and Other Wastewater Treatment Operations

gpm hpd dpy

Other: OR gpd dpy Other: Other:

gpm hpd dpy

Other: OR gpd dpy Other: Other:

gpm hpd dpy

Other: OR gpd dpy Other: Other:

gpm hpd dpy

Other: OR gpd dpy Other: Other:

gpm hpd dpy

Other: OR gpd dpy Other: Other:

gpm hpd dpy

Other: OR gpd dpy Other: Other:

gpm hpd dpy

Other: OR gpd dpy Other: Other:

gpm hpd dpy

Other: OR gpd dpy Other: Other:

gpm hpd dpy

Other: OR gpd dpy Other: Other:

gpm hpd dpy

Other: OR gpd dpy Other: Other:

gpm hpd dpy

Other: OR gpd dpy Other: Other:

gpm hpd dpy

Other: OR gpd dpy Other: Other:

gpm hpd dpy

Other: OR gpd dpy Other: Other:

gpm hpd dpy

Other: OR gpd dpy Other: Other:

gpm hpd dpy

Other: OR gpd dpy Other: Other:

gpm hpd dpy

Other: OR gpd dpy Other: Other:

gpm hpd dpy

Other: OR gpd dpy Other: Other:

gpm hpd dpy

Other: OR gpd dpy Other: Other:

D-14 Approved: May 20, 2010
Steam Electric Questionnaire Part D. Pond/Impoundment Systems and Other Wastewater Treatment Operations

Plant ID: Insert Plant ID

Plant Name: Insert Plant Name

Pond/Impoundment Unit ID: Insert Unit ID

Part: D

Section Title:

 Instructions:

CBI? D4-1.

 (Continue)

CBI? D4-2.

Residence time, hours (as currently operated)

Life of pond/impoundment unit, years (based on current estimation)

Number of cells in pond/impoundment unit

CBI? D4-3. Complete Table D-5. Provide the pond/impoundment unit's volume, surface area, bottom and top elevation, freeboard height, maximum height of berms and dams above the surrounding grade, and the total quantity of 

solids placed in the pond/impoundment when it was originally built or planned/designed, at its current status, and at its expected end of life. Additionally, provide the expected year of closure/retirement in the "Expected 

End of Life" column. Volume should reflect the free water volume, including the stored solids. For planned pond/impoundment units, enter "NA" in all fields in the "Current" column. Figure D-1 presents an illustration of 

pond/impoundment dimensions.

Note: Respondents are not required to take new measurements to provide this data; however, best available information should be used to complete Table D-5.

4.1. Active/Inactive/Open and Planned Pond/Impoundment Unit Information

Complete Section 4.1 (Questions D4-1 through D4-12) for each active/inactive/open pond/impoundment unit used OR planned to be used (or constructed/installed), including those located on non-adjoining property, by 

December 31, 2020 for the storage, treatment, and/or disposal of process wastewater, residues , or by-products (or sludges or water streams containing the residues or by-products) from the combustion of coal, 

petroleum coke, or oil, including but not limited to fly ash, bottom ash, boiler slag, or flue gas emission control residues. Use the pond/impoundment unit IDs assigned in Table A-4.

Make a copy of Section 4.1 for each active/inactive/open and planned pond/impoundment units used (or planned to be used) for the storage, treatment, and/or disposal of process wastewater, residues, or by-products 

(or sludges or water streams containing the residues or by-products) from the combustion of coal, petroleum coke, or oil, including but not limited to fly ash, bottom ash, boiler slag, or flue gas emission control residues 

using the "Copy Section 4.1" button below.

Provide the residence time of the process wastewater in the pond/impoundment unit, the life of the pond/impoundment unit (based on the current estimation), and the number of cells in the pond/impoundment unit. 

Do you use OR plan to use (or begin construction/installation of) by December 31, 2020, any active/inactive/open ponds/impoundments, including those located on non-adjoining property, for the storage, treatment, 

and/or disposal of process wastewater, residues, or by-products (or sludges or water streams containing the residues or by-products) from the combustion of coal, petroleum coke, or oil, including but not limited to fly 

ash, bottom ash, boiler slag, or flue gas emission control residues?

 (Skip to Section 4.2)

NOTE: If a pond/impoundment unit is part of a broader wastewater treatment system containing non-pond wastewater treatment units (e.g., a pond/impoundment unit in a biological wastewater 

treatment system), complete questions in this section for the pond/impoundment unit.

Yes

Yes

No

D-15 Approved: May 20, 2010
Steam Electric Questionnaire Part D. Pond/Impoundment Systems and Other Wastewater Treatment Operations

Originally Built or 

Planned/Designed Current Expected End of Life

Volume, ft3

Surface area, ft2

Bottom elevation, ft

Top elevation, ft

Freeboard height, ft

Maximum height of berms/dams 

above grade, ft

Total solids placed in the 

pond/impoundment, tons

Expected year of 

closure/retirement

 Figure D-1. Pond/Impoundment Dimensions

Table D-5. Active/Inactive/Open and Planned Pond/Impoundment Information

Yes

Copy Section 

No

Yes

D-16 Approved: May 20, 2010
Steam Electric Questionnaire Part D. Pond/Impoundment Systems and Other Wastewater Treatment Operations

CBI? D4-4.

 (Complete Table D-6)

Liner Layer Number (number 

from inner to outer layer) Type of Liner

Thickness of Liner 

Layer (cm)

Permeability of Liner Layer 

(cm/sec)

CBI? D4-5.

Year of last dredging

Frequency of dredging that year, dpy

Amount of material removed that year, tons

Number of times dredged in the last five years

Number of days dredged in the last five years

Amount of material removed in the last five years, tons

 (Skip to Question D4-7)

 (Pond/Impoundment is planned to be constructed. Skip to Question D4-10)

 (Skip to Question D4-5)

Has the pond/impoundment unit ever been dredged?

Table D-6. Pond/Impoundment Unit Liner

Does the pond/impoundment unit have a liner ?

 (Pond/Impoundment is planned to be constructed. Information is currently unavailable. Skip to Question D4-10).

D-17 Approved: May 20, 2010
Steam Electric Questionnaire Part D. Pond/Impoundment Systems and Other Wastewater Treatment Operations

CBI? D4-6.

CBI? D4-7.

 (Continue)

CBI? D4-8.

CBI? D4-9.

$

CBI? D4-10.

(Skip to Question D4-12)

Indicate the pollutants targeted for removal by this pond/impoundment unit using techniques other than solely settling (e.g., adding chemicals to remove certain metals). [Check all boxes that apply.]

 (Skip to Question D4-10)

 (Pond/Impoundment is planned to be constructed. Skip to Question D4-10)

Indicate where the dredged solids are transferred or are planned to be transferred.

Has the pond/impoundment unit been expanded since the date it was built?

Describe any expansion(s), since January 1, 2000, to the pond/impoundment unit, including the starting and ending dimensions.

Identify the type of expansion.

Provide the total cost associated with the expansion(s). Total costs should include labor, materials, energy, hazardous and nonhazardous waste disposal, purchased equipment, installation, buildings, site preparation, 

land, engineering costs, construction expenses, and any other costs available.

Total cost of expansion

Yes

No

NA

Compacted clay

Yes

D-18 Approved: May 20, 2010
Steam Electric Questionnaire Part D. Pond/Impoundment Systems and Other Wastewater Treatment Operations

CBI? D4-11.

Pollutant:

Limitation:

Pollutant:

Limitation:

Pollutant:

Limitation:

CBI? D4-12.

 (Complete Table D-7)

Chemical Type Trade Name Manufacturer Purpose

Location of 

Chemical 

Addition

Average Dose 

Concentration 

(g/L)

Frequency of 

Addition (dpy)

 (Skip to Section 4.2)

Average Addition Rate (gpd or 

lb/day)

Table D-7. Chemicals Used in Pond/Impoundment Unit Operations

 (Pond/impoundment is planned to be constructed. Provide information in Table D-7 to the extent possible based on plans.)

Did the plant add chemicals to this pond/impoundment unit in 2009?

Note that "Chemical Type" refers to the generic name of the chemical added to the pond/impoundment (e.g., lime, sodium hydroxide, alum, polymer ). “Average Dose Concentration” refers to the average 

concentration of the chemical within the pond/impoundment unit just after it is added to the unit. In the “Location of Chemical Addition” column, indicate where within or near the pond/impoundment the 

chemical is added (e.g., within the pond/impoundment near the process wastewater influent point, within the pond/impoundment near the effluent, in the effluent/discharge canal). If chemical addition is 

known only on a yearly basis, divide the yearly value by the approximate number of days the plant added chemicals (which should be the same estimate for the "Frequency of Addition" column).

Of the pollutants listed in D4-10, which effluent limitation(s) drives/will drive the operation of this pond/impoundment unit? Provide the pollutant and the limitation (mg/L or ug/L).

Compacted clay

Geosynthetic clay

High density polyethylene (HDPE)

Other (provide below:)

Compacted clay

Geosynthetic clay

High density polyethylene (HDPE)

Other (provide below:)

Compacted clay

Geosynthetic clay

High density polyethylene (HDPE)

Other (provide below:)

Compacted clay

Geosynthetic clay

High density polyethylene (HDPE)

D-19 Approved: May 20, 2010
Steam Electric Questionnaire Part D. Pond/Impoundment Systems and Other Wastewater Treatment Operations

Plant ID: Insert Plant ID

Plant Name: Insert Plant Name

Pond/Impoundment Unit ID: Insert Unit ID

Part: D

Section Title: 4.2. Closed Pond/Impoundment Unit Information

 Instructions:

CBI? D4-13.

 (Continue)

Complete Section 4.2 (Questions D4-13 through D4-24) for all pond/impoundment units closed on or after January 1, 2000, 

including those located on non-adjoining property, that were used for the storage, treatment, and/or disposal of process 

wastewater , residues , or by-products (or sludges or water streams containing the residues or by-products) from the combustion 

of coal, petroleum coke, or oil, including but not limited to fly ash, bottom ash, boiler slag, or flue gas emission control residues 

(use pond/impoundment unit IDs assigned in Table A-4).

Make a copy of Section 4.2 for each closed pond/impoundment unit, including those located on non-adjoining property, that was 

used for the storage, treatment, and/or disposal of process wastewater, residues, or by-products (or sludges or water streams 

containing the residues or by-products) from the combustion of coal, petroleum coke, or oil, including but not limited to fly ash , 

bottom ash , boiler slag, or flue gas emission control residues using the "Copy Section 4.2" button below.

NOTE: If a pond/impoundment was part of a broader wastewater treatment system containing non-pond wastewater 

treatment units (e.g., a pond/impoundment unit in a biological wastewater treatment system), complete questions in 

this section for the pond/impoundment unit.

 (Skip to Section 5.1)

Are there any ponds/impoundments closed on or after January 1, 2000, including those located on non-adjoining property, that 

were used for the storage, treatment, and/or disposal of residues or by-products (or sludges or water streams containing the 

residues or by-products) from the combustion of coal, petroleum coke, or oil, including but not limited to fly ash, bottom ash, 

boiler slag, or flue gas emission control residues?

Yes

D-20 Approved: May 20, 2010
Steam Electric Questionnaire Part D. Pond/Impoundment Systems and Other Wastewater Treatment Operations

CBI? D4-14.

Date Closed (month/day/year)

Life of pond/impoundment unit (years, actual)

Number of cells in pond/impoundment unit

CBI? D4-15.

Originally Built End of Life

Volume, ft3

Surface area, ft2

Bottom elevation, ft

Top elevation, ft

Freeboard height, ft

Maximum height of 

berms/dams above grade, ft

Total solids placed in the 

pond/impoundment, tons

Provide the date the pond/impoundment unit was closed, the actual life of the pond/impoundment unit, and the number of cells in 

the pond/impoundment unit.

Complete Table D-8. Provide the pond/impoundment unit's volume, surface area, bottom and top elevation, freeboard height, 

maximum height of berms and dams above the surrounding grade, and the total quantity of solids placed in the 

pond/impoundment when it was originally built and at its end of life, prior to any solids removal/cleaning. Volume should reflect 

original and final (accounting for any expansions) free water volume, including the stored solids. Please refer back to Figure D-1 

for an illustration of pond/impoundment dimensions.

Table D-8. Closed Pond/Impoundment Information

Yes

Copy Section 4.2

Yes

Yes

No

D-21 Approved: May 20, 2010
Steam Electric Questionnaire Part D. Pond/Impoundment Systems and Other Wastewater Treatment Operations

CBI? D4-16.

 (Complete Table D-9)

Liner Layer Number 

(number from inner to 

outer layer) Type of Liner 

Thickness of Liner 

Layer (cm)

Permeability of Liner Layer 

(cm/sec)

Does the pond/impoundment unit have a liner ?

Table D-9. Pond/Impoundment Unit Liner

 (Skip to Question D4-17)

Yes

Compacted clay

Geosynthetic clay

High density polyethylene (HDPE)

Other (provide below:)

Yes

No

D-22 Approved: May 20, 2010
Steam Electric Questionnaire Part D. Pond/Impoundment Systems and Other Wastewater Treatment Operations

CBI? D4-17.

 (Complete Table D-10)

Cap/Cover Layer Number 

(number from inner to 

outer layer) Type of Cap/Cover Layer

Thickness of 

Cap/Cover Layer 

(cm)

Permeability of Cap/Cover 

Layer (cm/sec)

Table D-10. Pond/Impoundment Unit Cap/Cover

Does the pond/impoundment unit have a cap/cover?

 (Skip to Question D4-18)

Compacted clay

Geosynthetic clay

High density polyethylene (HDPE)

Other (provide below:)

Compacted clay

Geosynthetic clay

High density polyethylene (HDPE)

Other (provide below:)

Compacted clay

Geosynthetic clay

High density polyethylene (HDPE)

Other (provide below:)

Compacted clay

Geosynthetic clay

High density polyethylene (HDPE)

Other (provide below:)

D-23 Approved: May 20, 2010
Steam Electric Questionnaire Part D. Pond/Impoundment Systems and Other Wastewater Treatment Operations

Yes

No

Yes

Compacted clay

Geosynthetic clay

Vegetative cover

High density polyethylene (HDPE)

Other (provide below:)

D-24 Approved: May 20, 2010
Steam Electric Questionnaire Part D. Pond/Impoundment Systems and Other Wastewater Treatment Operations

CBI? D4-18.

 (Continue)

CBI? D4-19.

CBI? D4-20.

$

CBI? D4-21.

 (Provide a copy of the closure plan)

 (Continue)

Describe any expansion(s), since January 1, 2000, to the pond/impoundment unit, including the starting and ending dimensions.

Did the plant have a closure plan for this pond/impoundment unit?

Provide the total cost associated with the expansion(s). Total costs should include labor, materials, energy, hazardous and 

nonhazardous waste disposal, purchased equipment, installation, buildings, site preparation, land, engineering costs, 

construction expenses, and any other costs available.

Total cost of expansion

Identify the type of expansion.

 (Skip to Question 4-21)

Was the pond/impoundment unit expanded during its life? Other (provide below:)

Compacted clay

Geosynthetic clay

Vegetative cover

High density polyethylene (HDPE)

Other (provide below:)

Compacted clay

Geosynthetic clay

Vegetative cover

High density polyethylene (HDPE)

Other (provide below:)

Compacted clay

Geosynthetic clay

Vegetative cover

High density polyethylene (HDPE)

Other (provide below:)

Compacted clay

Geosynthetic clay

D-25 Approved: May 20, 2010
Steam Electric Questionnaire Part D. Pond/Impoundment Systems and Other Wastewater Treatment Operations

CBI? D4-22.

CBI? D4-23. Has the plant built any structures on top of the closed pond/impoundment?

 (Continue)

CBI? D4-24.

 (Skip to Question D4-24)

Describe the closure process, the required steps, and the costs associated with the closure.

Note: Total costs should include labor, materials, energy, hazardous and nonhazardous waste disposal, purchased 

equipment, installation, buildings, site preparation, land, engineering costs, construction expenses, and any other 

costs available.

Note: If you attached a closure plan for the previous question that includes information on the required steps and 

associated costs of the closure, do not answer this question and indicate that the information is provided in the 

attached closure plan.

Is the plant performing or does it intend to perform long-term groundwater, soil, or overflow monitoring of this closed 

pond/impoundment unit?

Provide a description of the structure(s) and any challenges that the plant faced building on top of the pond/impoundment. Yes 

No

Lateral expansion

Vertical expansion

Both lateral and vertical expansions

Yes

Yes

Geosynthetic clay

Vegetative cover

High density polyethylene (HDPE)

Other (provide below:)

Compacted clay

Geosynthetic clay

Vegetative cover

High density polyethylene (HDPE)

Other (provide below:)

D-26 Approved: May 20, 2010
Steam Electric Questionnaire Part D. Pond/Impoundment Systems and Other Wastewater Treatment Operations

Plant ID: Insert Plant ID

Plant Name: Insert Plant Name

Wastewater Treatment System ID: Insert System ID

Part: D

Section Title:

 Instructions:

CBI? D5-1.

 (Continue)

 

CBI? D5-2.

Plant Designation

Date Added to 

Wastewater 

Treatment System 

(month/day/year)

Volume 

(ft3)

Footprint/ 

Surface 

Area (ft2)

Residence 

Time (hours)

Other:

Pond ID:

Other:

Pond ID:

Other:

Pond ID:

Other:

Pond ID:

In Table D-11, list all wastewater treatment units comprising the wastewater treatment system including units that are under construction/installation, or planned to be under construction/installation 

by December 31, 2020, included in the wastewater treatment system. For each wastewater treatment unit, assign an ID using the wastewater treatment unit terms provided in the drop down menu 

(e.g., Clarification, Primary-1), which will be used throughout the remainder of the survey; however, if a pond/impoundment unit is included as part of the wastewater treatment system, enter the 

pond/impoundment unit ID assigned in Table A-4 in the space labeled "Pond ID". The drop down menu accounts for the possibility of multiple wastewater treatment units; they are numbered 

sequentially. Note that these terms originated from the code tables on the "Code Tables" tab, provided at the end of this workbook. 

For example, if the wastewater treatment system includes two clarifiers, select Clarification, Primary-1 for the first clarifier and Clarification, Secondary-1 for the second. In the “Plant Designation” 

column, provide the plant’s name for each wastewater treatment unit. In the “Date Added to WWT System” column, either enter the date the unit was/will be installed if the unit is a retrofit, or enter 

“original” if the unit was part of the original wastewater treatment system installation. 

Materials of Construction [Check all boxes that apply.]

 (Skip to Part D Section 6.1)

5.1. Wastewater Treatment Unit Information - System Level

Did you identify any wastewater treatment systems in Table D-2?

Wastewater Treatment Unit ID

Table D-11. Wastewater Treatment Units

Complete Section 5.1 (Questions D5-1 through D5-12) for each wastewater treatment system identified in Table D-2, including planned (under construction/installation, or planned to be under 

construction/installation by December 31, 2020) wastewater treatment systems. Enter the wastewater treatment system ID in the space provided above (use wastewater treatment system ID 

assigned in Table D-2).

Make a copy of Section 5.1 for each wastewater treatment system identified in Table D-2 using the "Copy Section 5.1" button below.

NOTE: If the wastewater treatment system includes a pond/impoundment unit, include the pond/impoundment unit in Table D-11.

Yes

Copy Section 5.1

Yes

Yes

No

D-27 Approved: May 20, 2010
Steam Electric Questionnaire Part D. Pond/Impoundment Systems and Other Wastewater Treatment Operations

Other:

Pond ID:

Other:

Pond ID:

Other:

Pond ID:

Other:

Pond ID:

Other:

Pond ID:

Other:

Pond ID:

Other:

Pond ID:

Other:

Pond ID:

Other:

Pond ID:

Other:

Pond ID:

Other:

Pond ID:

Other:

Pond ID:

Other:

Pond ID:

Other:

Pond ID:

Other:

Pond ID:

D-28 Approved: May 20, 2010
Steam Electric Questionnaire Part D. Pond/Impoundment Systems and Other Wastewater Treatment Operations

Other:

Pond ID:

Other:

Pond ID:

Other:

Pond ID:

Other:

Pond ID:

CBI? D5-3.

Average design flow rate, gpm

Maximum design flow rate, gpm

Typical flow rate in 2009, gpm

Maximum daily flow rate in 2009, gpm

Maximum daily flow rate in 2009, gpd

Duration of effluent transfers from treatment system in 2009, hpd

Frequency of effluent transfers from treatment system in 2009, dpy

CBI? D5-4.

(Skip to Question D5-6)

Indicate the pollutants targeted for removal by this wastewater treatment system using techniques other than solely settling (e.g., adding chemicals to remove certain metals). 

[Check all boxes that apply.]

Provide the design flow rate for the wastewater treatment system, as well as both the average and maximum flow rates for 2009. In addition, provide the duration and frequency of the effluent 

transfers from the wastewater treatment system in 2009. If the wastewater treatment system is planned, only provide the design flow rate and enter "NA" in all other fields.

D-29 Approved: May 20, 2010
Steam Electric Questionnaire Part D. Pond/Impoundment Systems and Other Wastewater Treatment Operations

CBI? D5-5.

Pollutant:

Limitation:

Pollutant:

Limitation:

Pollutant:

Limitation:

CBI? D5-6.

 (Continue)

 (Skip to Question D5-8)

CBI? D5-7. Is the plant currently performing sulfide addition?

CBI? D5-8.

CBI? D5-9.

CBI? D5-10. Provide any bid proposals and/or engineering reports that were prepared since January 1, 1995 for the wastewater treatment system.

Note: All bid proposals and/or engineering reports originally submitted to the plant as CBI, should be marked CBI for the purpose of this collection request.

Of the pollutants listed in D5-4, which effluent limitation(s) drives/will drive the operation of this wastewater treatment system? Provide the pollutant and the limitation (mg/L or 

ug/L).

Is this wastewater treatment system capable of performing sulfide addition?

Provide information on any impacts that space availability had, or will have, on the design and/or cost of the wastewater treatment system (e.g., cost increases due to fitting the wastewater 

treatment system units into tight spaces and/or moving other equipment to accommodate the treatment system units).

Provide information on any impacts that climate had, or will have, on the installation of the wastewater treatment system (e.g., equipment had to be housed inside due to cold winters, extra 

insulation was necessary to protect equipment in winter, warm climate allowed all wastewater treatment to be located outdoors).

D-30 Approved: May 20, 2010
Steam Electric Questionnaire Part D. Pond/Impoundment Systems and Other Wastewater Treatment Operations

CBI? D5-11.

Description of 

Improvement

Expected Date of 

Improvement 

(month/day/year)

Total 

Capital 

Cost ($)

Other:

Pond ID:

Other:

Pond ID:

Other:

Pond ID:

Other:

Pond ID:

Other:

Pond ID:

CBI? D5-12.

 (Continue)

 (Skip to Section 5.2)

Were any of the above planned improvements to the wastewater treatment system, or the planned wastewater treatment system, planned in preparation for potential limit changes in the future?

Please identify which pollutants and/or limits, in particular, the improvements or system will target.

Wastewater Treatment Unit ID

Table D-12. Planned Improvements to the Wastewater Treatment System

In Table D-12, list all planned improvements (including those currently under construction/installation or those planned to be under construction/installation by December 31, 2020) to the wastewater 

treatment system. For each planned improvement to the wastewater treatment system, provide the WWT Unit ID the improvement pertains to (if applicable), using the terms in the drop down menu; 

however, if the improvement relates directly to a pond/impoundment, use the pond/impoundment ID assigned in Table A-4. Provide a description of the improvement, the expected date of the 

improvement, and the total capital cost related to the improvement.

Note: Total capital costs should include purchased equipment, installation, buildings, site preparation, land, engineering costs, construction expenses, and any other costs available.

Yes

D-31 Approved: May 20, 2010
Steam Electric Questionnaire Part D. Pond/Impoundment Systems and Other Wastewater Treatment Operations

Plant ID: Insert Plant ID

Plant Name: Insert Plant Name

Wastewater Treatment System ID: Insert System ID

Part: D

Section Title:

 Instructions:

CBI? D5-13.

 (Complete Table D-13)

 

 (Skip to Section 6.1)

 

Chemical Type Trade Name Manufacturer Purpose

Average Dose 

Concentration (g/L)

Frequency of 

Addition (dpy)

Other:

Other:

Other:

Other:

Other:

Other:

Other:

Wastewater Treatment Unit ID 

(Identified in Table D-11)

5.2. Wastewater Treatment System Chemical Addition

Average Addition Rate (gpd or 

lb/day)

Complete Section 5.2 (Question D5-13) for each wastewater treatment system identified in Table D-2 (including those under construction/installation or planned to be under construction/installation by December 31, 

2020). Enter the wastewater treatment system ID in the spaces provided above (use wastewater treatment system IDs assigned in Table D-2).

Make a copy of Section 5.2 for each wastewater treatment system identified in Table D-2 using the "Copy Section 5.2" button below.

Table D-13. Chemicals Used in Wastewater Treatment Unit Operations

Complete Table D-13 for each unit (as defined in Table D-11) that chemicals are added to in the wastewater treatment system. Complete a row for each chemical added to each unit in the system.

Note that "Chemical Type" refers to the generic name of the chemical added to the wastewater treatment unit (e.g., lime, organosulfide). "Average Dose Concentration" refers to the average concentration of the 

chemical within the wastewater treatment unit just after it is added to the unit. If chemical addition is known only on a yearly basis, divide the yearly value by the approximate number of days the plant added 

chemicals (which should be the same estimate for the "Frequency of Addition" column).

Did the plant add chemicals to any wastewater treatment units in 2009?

 (Wastewater treatment unit is planned to be constructed. Provide information in Table D-13 to the extent possible based on plans.)

Yes

No

NA

Copy Section 5.2

Yes

D-32 Approved: May 20, 2010
Steam Electric Questionnaire Part D. Pond/Impoundment Systems and Other Wastewater Treatment Operations

Other:

Other:

Other:

Other:

Other:

Other:

Other:

Other:

Other:

Other:

Other:

Other:

Other:

Other:

Other:

Other:

Other:

Other:

Other:

Other:

D-33 Approved: May 20, 2010
Steam Electric Questionnaire Part D. Pond/Impoundment Systems and Other Wastewater Treatment Operations

Other:

Other:

D-34 Approved: May 20, 2010
Steam Electric Questionnaire Part D. Pond/Impoundment Systems and Other Wastewater Treatment Operations

Plant ID: Insert Plant ID

Plant Name: Insert Plant Name

Pond/Impoundment System ID or Wastewater Treatment System ID: Insert System ID

Part: D

Section Title:

 Instructions:

CBI? D6-1.

 (Continue)

 (Skip to next Questionnaire Part)

CBI? D6-2.

O&M Cost Category

No. of workers

Operating labor $ $ hpd

dpy

No. of workers

Maintenance labor $ $ hpd

dpy

Maintenance materials $

Chemicals $

Did any ponds/impoundments , including those that are part of a pond/impoundment system identified in Table D-1, and/or wastewater treatment systems, identified in Table D-2, begin 

operating (or plan to begin operating) after January 1, 2000?

per hour (average 

rate of labor)

per hour (average 

rate of labor)

6.1. Pond/Impoundment System and Wastewater Treatment System Costs

Provide annual O&M cost data in Table D-14 for each pond/impoundment system identified in Table D-1, that includes at least one pond/impoundment that began operating at the plant on or 

after January 1, 2000, and/or wastewater treatment system, identified in Table D-2, that began operating at the plant on or after January 1, 2000, that was operated in 2009. Provide best 

engineering estimates when actual data are not readily available. If you provide an estimate, note the methods that were used to make the estimates in the Comments page.

2009 Annual Cost 2009 Rate 2009 Staffing/ Consumption

Complete Sections 6.1 and 6.2 (Questions D6-1 through D6-6) for each pond/impoundment system identified in Table D-1, that includes at least one pond/impoundment that began 

operating at the plant on or after January 1, 2000. For example if a pond/impoundment system began operating in 1996, but a new pond/impoundment was added in 2002, information 

regarding the pond/impoundment system must be provided for this section. Also complete Sections 6.1 and 6.2 (Questions D6-1 through D6-6) for each wastewater treatment system 

identified in Table D-2 that began operating at the plant on or after January 1, 2000. These pond/impoundment systems and wastewater treatment systems also include those under 

construction/installation or planned to be under construction/installation by December 31, 2020. Enter the pond/impoundment system ID or wastewater treatment system ID in the space 

provided above (use pond/impoundment system IDs and wastewater treatment system IDs assigned in Table D-1 and Table D-2).

Make a copy of Sections 6.1 and 6.2 for each pond/impoundment system and/or wastewater treatment system identified in Table D-1 and Table D-2 using the "Copy Section 6.1 and 6.2" 

button below. Just pressing this button once will generate copies of both tabs.

Table D-14. O&M Cost for the Pond/Impoundment System or Wastewater Treatment System for 2009

Note: Do NOT include corrective actions in the O&M costs for the ponds/impoundments in the system.

Copy Section 6.1 and 6.2

Yes

Yes

No

D-36 Approved: May 20, 2010
Steam Electric Questionnaire Part D. Pond/Impoundment Systems and Other Wastewater Treatment Operations

Energy - Power for pumping $ $ per kWh kWh/hr

Energy - Power for operations other than pumping $ $ per kWh kWh/hr

Steam $ $ per pound pounds/hr

Hazardous Sludge Disposal - Dredging $ $ per 

Hazardous Sludge Disposal - Landfilling $ $ per 

Nonhazardous Sludge Disposal - Dredging $ $ per 

Nonhazardous Sludge Disposal - Landfilling $ $ per 

Other:

$

Other:

$

Total O&M Cost (2009) $

CBI? D6-3. Provide cost data in Table D-15 only for those ponds/impoundments, within the pond/impoundment system identified in Table D-1, that began operating on or after January 1, 2000, and/or 

wastewater treatment systems, identified in Table D-2, that began operating at the plant on or after January 1, 2000. These ponds/impoundments and wastewater treatment systems include 

retired/closed ponds/impoundments, planned ponds/impoundments, and planned wastewater treatment systems (including those under construction/installation or planned to be under 

construction/installation by December 31, 2020). Additionally, include any costs incurred by the pond/impoundment system since January 1, 2000. For example, if a pond/impoundment 

system was installed in 1996, and one new pond was added in 2002, report the capital costs for the new pond only, and any capital costs (i.e., piping, pumps) incurred for the entire 

pond/impoundment system since 2000. 

Provide best engineering estimates when actual data are not readily available. For all costs, do not adjust for inflation. For example, if the plant incurred a land cost in 2002, enter the cost in 

the “Cost” column and enter “2002” in the “Year on which Cost is Based” column.

NOTE: If no records are available on this wastewater treatment system, provide an explanation in the Comments page.

Yes

D-37 Approved: May 20, 2010
Steam Electric Questionnaire Part D. Pond/Impoundment Systems and Other Wastewater Treatment Operations

Project

$

$

$

$

$

Total Direct Costs $

Engineering Costs (includes process design and general 

engineering, cost engineering, consulting fees, supervision, 

inspection for each category below:

 a. Engineering Contract Firm Costs $

 b. Owner's Overhead Engineering Costs $

$

$

$

Total Indirect Costs $

Total Capital Cost $

Indirect Costs

Direct Costs

Purchased equipment (includes all equipment for the installation or 

the upgrade: mechanical equipment; piping; instrumentation; 

electrical equipment; spare parts; freight charges; taxes; insurance; 

and duties) 

Land (includes property costs and survey fees)

Buildings (buildings constructed to house pond/impoundment system 

and/or wastewater treatment system components, operator rooms, 

or other operations associated with the system; also includes 

plumbing, heating, ventilation, dust collection, air conditioning, 

lighting, telephones, intercoms, painting, sprinklers, fire alarms) 

Construction expenses (includes temporary construction offices, 

roads, communications, fencing; construction tools and equipment; 

permits, taxes, insurance)

Other Contractor's Fees

Contingency actually expended (to compensate for unpredictable 

events such as storms, floods, strikes, price changes, errors in 

estimates, design changes, etc.)

Site preparation (includes site clearing, all demolition, grading, 

roads, walking areas, fences)

Cost 

Table D-15. Capital Cost for the Pond/Impoundment System or Wastewater Treatment System

Year on which Cost is 

Based

Purchased equipment installation (includes installation of all 

equipment; piping; instrumentation/calibration; electrical equipment; 

mechanical equipment; structural supports, insulation, and paint)

D-38 Approved: May 20, 2010
Steam Electric Questionnaire Part D. Pond/Impoundment Systems and Other Wastewater Treatment Operations

CBI? D6-4.

 (Skip to Question D6-5)

 (Continue)

CBI? D6-5.

CBI? D6-6.

If applicable, indicate whether the FGD wastewater treatment system, for which the plant provided capital cost data in Table D-15, was a retrofit or was installed when the FGD scrubber 

system was installed. 

If applicable, indicate whether the FGD wastewater treatment system, for which the plant provide capital cost data in Table D-15, was purchased as part of the FGD scrubber package.

Are all components of the pond/impoundment system and/or wastewater treatment system included in the capital costs reported in Table D-15?

Please explain what system components are included in the capital costs listed in Table D-15. Additionally, identify the key components of the pond/impoundment system and/or wastewater 

treatment system that are not included in the capital costs reported in Table D-15.

Yes

D-39 Approved: May 20, 2010
Steam Electric Questionnaire Part D. Pond/Impoundment Systems and Other Wastewater Treatment Operations

Plant ID: Insert Plant ID

Plant Name: Insert Plant Name

Pond/Impoundment System ID or Wastewater Treatment System ID: Insert System ID

Part: D

Section Title:

 Instructions:

CBI? D6-7.

Examples of ancillary equipment:

Aerator

Agitator

Chemical feed system (specify chemicals)

Pump, sludge (specify purpose/location)

Pump, wastewater (specify purpose/location)

6.2. Pond/Impoundment System and Wastewater Treatment System Equipment

Complete Section 6.2 (Question D6-7) for all ancillary pieces of equipment included in the 

pond/impoundment or wastewater treatment system that contribute to the capital costs provided in Table 

D-15.

Note: This tab will copy with every copy made for the previous tab (Part D Section 6.1) as the 

information is directly related.

In Table D-16, list any ancillary pieces of equipment (i.e., equipment such as pumps and agitators) 

included in the pond/impoundment system or wastewater treatment system that contribute significantly to 

the capital costs provided in Table D-16 and provide the total number of pieces of that equipment included 

in the system. Refer to the examples of ancillary equipment shown below. 

Yes

D-40 Approved: May 20, 2010
Steam Electric Questionnaire Part D. Pond/Impoundment Systems and Other Wastewater Treatment Operations

Ancillary Equipment (if applicable)

Number of Ancillary

Equipment Pieces in the 

System

Pump, sludge (serving underflow 

from clarifiers) 2

Table D-16. Ancillary Equipment of the Pond/Impoundment 

System or Wastewater Treatment System

D-41 Approved: May 20, 2010
Steam Electric Questionnaire Part D. Pond/Impoundment Systems and Other Wastewater Treatment Operations

D-42 Approved: May 20, 2010
Steam Electric Questionnaire Part D. Pond/Impoundment Systems and Other Wastewater Treatment Operations

Plant ID: Insert Plant ID

Plant Name: Insert Plant Name

Part: D

Section Title:

 Instructions:

Question 

Number

CBI?

CBI?

CBI?

CBI?

CBI?

CBI?

CBI?

CBI?

CBI?

CBI?

CBI?

CBI?

Comments

Cross reference your comments by question number and indicate the confidential status of your comment by checking the box next to “Yes” under "CBI?" 

(Confidential Business Information). 

Part D Comments

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

D-43 Approved: May 20, 2010
Steam Electric Questionnaire Part D. Pond/Impoundment Systems and Other Wastewater Treatment Operations

CBI?

CBI?

CBI?

CBI?

CBI?

CBI?

CBI?

CBI?

CBI?

CBI?

CBI?

CBI?

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

D-44 Approved: May 20, 2010
Steam Electric Questionnaire Part D. Pond/Impoundment Systems and Other Wastewater Treatment Operations

Air heater cleaning water AHCW

Ash pile runoff APR Effluent - 1 EFF-1

Boiler blowdown BB Effluent - 2 EFF-2

Boiler fireside cleaning water BFCW Effluent - 3 EFF-3

Boiler tube cleaning water BTCW Effluent - 4 EFF-4

Bottom ash sluice BAS Effluent - 5 EFF-5

Carbon capture wastewater CCAPW Effluent - 6 EFF-6

Coal pile runoff CPR Filter backwash FltBW

Combined ash sluice CAS Sludge SLDG

Combustion turbine cleaning (combustion gas portion of 

turbine) water

COMBCW

Combustion turbine cleaning (compressor portion of the 

turbine) water

COMPRCW POND-1 Effluent POND-1-EFF

Combustion turbine evaporative coolers blowdown TECB POND-2 Effluent POND-2-EFF

Cooling tower blowdown CTB POND-3 Effluent POND-3-EFF

FGD scrubber purge SCRBP POND-4 Effluent POND-4-EFF

FGD slurry blowdown FGDB POND-5 Effluent POND-5-EFF

Filter Backwash FLTBW POND-6 Effluent POND-6-EFF

Floor drain wastewater FDW POND-7 Effluent POND-7-EFF

Flue gas mercury control system wastewater FGMCW POND-8 Effluent POND-8-EFF

Fly ash sluice FAS POND-9 Effluent POND-9-EFF

General runoff GR POND-10 Effluent POND-10-EFF

Gypsum pile runoff GPR POND-A Effluent POND-A-EFF

Gypsum wash water GYPWW POND-B Effluent POND-B-EFF

Ion exchange wastewater IXW POND-C Effluent POND-C-EFF

Landfill runoff - capped landfill LRC WWT-1 Effluent WWT-1-EFF

Landfill runoff - uncapped landfill LRUC WWT-2 Effluent WWT-2-EFF

Leachate LEACH WWT-3 Effluent WWT-3-EFF

Limestone pile runoff LPR WWT-4 Effluent WWT-4-EFF

Mill reject sluice MRS WWT-5 Effluent WWT-5-EFF

Steam Electric Questionnaire Code Tables

For Use as Effluents from Pond/Impoundment Systems 

and/or Wastewater Treatment Systems in Part D, Table D-4.

Process Wastewaters

For Use in Tables and Questions throughout Parts A, B, C, D, and F.

For Use as Influents to Pond/Impoundment Systems 

and/or Wastewater Treatment Systems in Part D, Table D-3, 

AND Recycled Waters Throughout Questionnaire.

Treated Wastewaters

Approved: May 20, 2010
Steam Electric Questionnaire Part D. Pond/Impoundment Systems and Other Wastewater Treatment Operations

Steam Electric Questionnaire Code Tables

Once -through cooling water CW WWT-6 Effluent WWT-6-EFF

Reverse osmosis reject water RORW WWT-A Effluent WWT-A-EFF

SCR catalyst regeneration wastewater SCRRW WWT-B Effluent WWT-B-EFF

SCR catalyst washing wastewater SCRWW WWT-C Effluent WWT-C-EFF

Soot blowing wash water SOOTW

Steam turbine cleaning water STCW

Yard drain wastewater YARDW

Process Wastewaters Treated Wastewaters

For Use in Tables and Questions throughout Parts A, B, C, D, and F.

For Use as Influents to Pond/Impoundment Systems 

and/or Wastewater Treatment Systems in Part D, Table D-3, 

AND Recycled Waters Throughout Questionnaire.

Approved: May 20, 2010
Steam Electric Questionnaire Part D. Pond/Impoundment Systems and Other Wastewater Treatment Operations

Steam Electric Questionnaire Code Tables

Adsorptive media ADSORB Burned on site BURN

Aerobic Biological Reactor AERBIO Deep-well injection DWELL

Anaerobic Biological Reactor ANBIO Discharge to POTW POTW

Aerobic/Anaerobic Biological Reactor AER/ANBIO Discharge to PrOTW PrOTW

Chemical Precipitation Reaction Tank 1 - 1 CP-1-1 Discharge to surface water SW

Chemical Precipitation Reaction Tank 1 - 2 CP-1-2 Evaporation EVAP

Chemical Precipitation Reaction Tank 2 - 1 CP-2-1 Hauled off site for reuse 

(removal fee)

HAULR - RF

Chemical Precipitation Reaction Tank 2 - 2 CP-2-2 Hauled off site for reuse (given 

away)

HAULR - GA

Chemical Precipitation Reaction Tank 3 - 1 CP-3-1 Hauled off site for reuse 

(marketed and sold)

SOLD

Chemical Precipitation Reaction Tank 3 - 2 CP-3-2 Hauled off site for disposal HAUL

Clarification, Primary - 1 CL-P-1 Mixed with fly ash for disposal MFA

Clarification, Primary - 2 CL-P-2 On-site landfill (as reported in 

Table A-6)

LANDF

Clarification, Secondary - 1 CL-S-1 POND-1 POND-1

Clarification, Secondary - 2 CL-S-2 POND-2 POND-2

Clarification, Tertiary - 1 CL-T-1 POND-3 POND-3

Clarification, Tertiary - 2 CL-T-2 POND-4 POND-4

Constructed wetland - Cell 1 CWL -1 POND-5 POND-5

Constructed wetland - Cell 2 CWL -2 POND-6 POND-6

Constructed wetland - Cell 3 CWL -3 POND-7 POND-7

Constructed wetland - Cell 4 CWL -4 POND-8 POND-8

Constructed wetland - Cell 5 CWL -5 POND-9 POND-9

Constructed wetland - Cell 6 CWL -6 POND-10 POND-10

Constructed wetland system CWTS POND-A POND-A

Equalization, Primary EQ-P POND-B POND-B

Equalization, Secondary EQ-S POND-C POND-C

Filter, Microfiltration - 1 FLT-M-1 WWT-1 WWT-1

Filter, Microfiltration - 2 FLT-M-2 WWT-2 WWT-2

For Use in Tables and Questions Throughout Parts A, C, D, 

and F.

Wastewater Treatment Units Destinations

For Use in Tables and Questions Throughout Parts D and F.

Approved: May 20, 2010
Steam Electric Questionnaire Part D. Pond/Impoundment Systems and Other Wastewater Treatment Operations

Steam Electric Questionnaire Code Tables

Filter, Microfiltration - 3 FLT-M-3 WWT-3 WWT-3

Filter, Microfiltration - 4 FLT-M-4 WWT-4 WWT-4

Filter, Sand/Gravity - 1 FLT-S-1 WWT-5 WWT-5

Filter, Sand/Gravity - 2 FLT-S-2 WWT-6 WWT-6

Filter, Sand/Gravity - 3 FLT-S-3 WWT-A WWT-A

Filter, Sand/Gravity - 4 FLT-S-4 WWT-B WWT-B

Filter, Ultrafiltration - 1 FLT-U-1 WWT-C WWT-C

Filter, Ultrafiltration - 2 FLT-U-2 Reuse as boiler water RECYC - BW

Filter, Ultrafiltration - 3 FLT-U-3 Reuse as bottom ash sluice RECYC - BAS

Filter, Ultrafiltration - 4 FLT-U-4 Reuse as combined ash sluice RECYC - CAS

Filter press - 1 FP-1 Reuse as FGD slurry 

preparation water

RECYC - FGDP

Filter press - 2 FP-2 Reuse as FGD absorber 

makeup

RECYC - FGDAB

Holding tank HT Reuse as fly ash sluice RECYC - FAS

Ion exchange IX Reuse as mill reject sluice RECYC - MRS

Natural wetlands NW Reuse in cooling towers RECYC - CW

pH adjustment - 1 PH-1

pH adjustment - 2 PH-2

pH adjustment - 3 PH-3

Reverse osmosis ROS

Pond Unit - 1 SPD-1

Pond Unit - 2 SPD-2

Pond Unit - 3 SPD-3

Pond Unit - 4 SPD-4

Pond Unit - 5 SPD-5

Pond Unit - 6 SPD-6

Pond Unit - 7 SPD-7

Pond Unit - 8 SPD-8

Pond Unit - 9 SPD-9

Wastewater Treatment Units Destinations

For Use in Tables and Questions Throughout Parts D and F. For Use in Tables and Questions Throughout Parts A, C, D, 

and F.

Approved: May 20, 2010
Steam Electric Questionnaire Part D. Pond/Impoundment Systems and Other Wastewater Treatment Operations

Steam Electric Questionnaire Code Tables

Pond Unit - 10 SPD-10 Centrifuge - 1 CENT-1

Pond Unit - 11 SPD-11 Centrifuge - 2 CENT-2

Pond Unit - 12 SPD-12 Centrifuge - 3 CENT-3

Pond Unit - 13 SPD-13 Centrifuge - 4 CENT-4

Pond Unit - 14 SPD-14 Hydrocyclones - 1 HYC-1

Settling tank - 1 ST-1 Hydrocyclones - 2 HYC-2

Settling tank - 2 ST-2 Hydrocyclones - 3 HYC-3

Settling tank - 3 ST-3 Hydrocyclones - 4 HYC-4

Settling tank - 4 ST-4 Filter press - 1 FP-1

Settling tank - 5 ST-5 Filter press - 2 FP-2

Thickener - 1 TH-1 Thickener - 1 TH-1

Thickener - 2 TH-2 Thickener - 2 TH-2

Vacuum drum filter - 1 VF-1 Vacuum drum filter - 1 VF-1

Vacuum drum filter - 2 VF-2 Vacuum drum filter - 2 VF-2

Vacuum filter belt - 1 VFB-1 Vacuum filter belt - 1 VFB-1

Vacuum filter belt - 2 VFB-2 Vacuum filter belt - 2 VFB-2

For Use in Tables and Questions Throughout Parts D and F. For Use as Planned Solids Handling for the FGD Slurry 

Blowdown in Part B Table B-2.

Wastewater Treatment Units Solids Handling

Approved: May 20, 2010