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 G Instructions

Part G Section 1

Part G Section 2

Part G Section 3

Part G Section 4

Part G Section 5

Part G Sampling Results

Part G Comments Part G Comments

Leachate Sample Collection Instructions

Sample Collection Information

Laboratory Analytical Data Form

Waste Information

Steam Electric Questionnaire 

PART G - LEACHATE SAMPLING DATA FOR PONDS/IMPOUNDMENTS AND LANDFILLS

Part G Instructions

Leachate Generated from Ponds/Impoundments and

 Landfills

Table of Contents

Leachate Collection

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

Plant ID: Insert Plant ID

Plant Name: Insert Plant Name

PART G. LEACHATE SAMPLING DATA FOR PONDS/IMPOUNDMENTS AND 

LANDFILLS

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

requested in certain questions within Part G; indicate atypical data (e.g., if the analytical 

data provided from the sample collection is not representative of normal operations); 

and note methods used to make best engineering estimates in the event that exact data 

are not available.

INSTRUCTIONS

Complete Part G of the questionnaire for your plant. As you are completing the 

electronic form, note the following: When you enter your plant name and plant ID on the 

Part G TOC tab, all name and ID fields throughout Part G will automatically populate. 

Refer to the overall questionnaire instructions, the glossary, and the acronym list for 

assistance with completing Part G. 

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

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

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

and landfill names 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 landfill.

Sampling data and the completed Part G of the questionnaire shall be submitted 

to EPA no later than 120 calendar days after receiving the questionnaire. 

A company or plant may be exempt from the leachate sample collection (Question G3-

1). Please refer to Question G1-1 and the "Applicability" section located in the "Part G 

Section 3" tab to determine if you are exempt and how to submit a written explanation.

Approved: May 20, 2010
Steam Electric Questionnaire Part G. Leachate Sampling Data for Ponds/Impoundments and Landfills

Part: G

Section Title:

 Instructions:

CBI? G1-1.

 

 (Skip to next Questionnaire Part)

Insert Plant ID

Insert Plant Name

Plant ID:

Plant Name:

(Skip to Section 2)

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

includes landfills, within 20 miles, owned/operated by the plant's ultimate parent firm, for the purpose of storing/disposing of 

process wastewaters, residues or by-products, from the plant.

Is leachate currently collected from any pond/impoundment and/or landfill , including those located on non-adjoining 

property, that contains residues or by-products from the combustion of coal or petroleum coke? Please see the glossary for 

a complete definition of leachate , which includes the terms seepage, leak, and leakage.

1. Leachate Collection

Part G requests leachate sampling data for pond/impoundment units and landfills 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 or petroleum coke, including, but not limited to, fly ash , bottom ash , boiler slag, or flue gas 

desulfurization (FGD) system residues. This includes liquid-borne material and solid material.

Yes

No

Yes

G-1 Approved: May 20, 2010
Steam Electric Questionnaire Part G. Leachate Sampling Data for Ponds/Impoundments and Landfills

Part: G

Section Title:

 Instructions:

CBI? G2-1.

CBI? G2-2.

Insert Plant ID

Insert Plant Name

Insert ID

Plant ID:

Plant Name:

Pond/Impoundment Unit or Landfill ID:

2. Leachate Generated from Ponds/Impoundments and Landfills

(Continue)

Is all collected leachate transported off site for treatment and/or disposal? 

Make copies of Section 2 (Questions G2-1 through G2-4) for each pond/impoundment unit and landfill , including those located on non-adjoining 

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

(FGD) system residues. This includes liquid-borne material and solid material. Enter the pond/impoundment unit or landfill ID in the space provided 

above (use pond/impoundment unit and landfill IDs assigned in Table A-4 and Table A-6). Please provide all free response answers in the 

highlighted yellow areas.

Note: This includes landfills located on non-adjoining property that are under the operational control of the plant. This also includes landfills, within 

20 miles, owned/operated by the plant's ultimate parent firm, for the purpose of storing/disposing of process wastewaters, residues or by-products, 

from the plant.

(Continue)

(Skip to Section 3. Provide ONLY untreated monitoring data as described in Question G3-1.)

(Skip to Section 5)

Is leachate currently collected from this pond/impoundment unit or landfill (excluding leachate returned to the pond/impoundment from which it 

originated)?

Note: "Treatment" refers to the removal of specific pollutants or process wastewater constituents other than suspended solids. Refer to Figure G-1 

below to help determine the leachate sample collection requirements for this pond/impoundment or landfill.

Make a copy of Section 2 for each pond/impoundment unit and landfill, including those located on non-adjoining property, using the "Copy Section 

2" button below.

Yes

No

Yes

No

Yes

Yes

Copy Section 2

G-2 Approved: May 20, 2010
Steam Electric Questionnaire Part G. Leachate Sampling Data for Ponds/Impoundments and Landfills

CBI? G2-3.

CBI? G2-4.

(Provide ONLY untreated monitoring data as described in Question G3-1)

(Continue)

(Skip to Section 3. Provide ONLY untreated monitoring data as described in Question G3-1.)

Is the leachate combined with other waste streams prior to treatment?

(Provide treated and untreated monitoring data as described in Question G3-1)

(Provide treated and untreated monitoring data as described in Question G3-1)

Is the collected leachate from this pond/impoundment unit or landfill that is not transferred off site currently treated?

Yes

Yes

No

Yes

Yes, combined with ONLY runoff or other stormwater 

Yes, combined with process wastewater other than runoff/stormwater

No

G-3 Approved: May 20, 2010
Steam Electric Questionnaire Part G. Leachate Sampling Data for Ponds/Impoundments and Landfills

Figure G-1. Leachate Collection Decision Tree

G-4 Approved: May 20, 2010
Steam Electric Questionnaire Part G. Leachate Sampling Data for Ponds/Impoundments and Landfills

Part: G

Section Title:

G3-1.

Plant ID:

Plant Name:

Insert Plant ID

Insert Plant Name

3. Leachate Sample Collection Instructions

OVERVIEW OF THE SAMPLE COLLECTION 

The samples should be collected as detailed in these instructions. In general, samples should be collected as grab samples (i.e., 

composite samples are not required). The plant should collect samples from each leachate collection point for each 

pond/impoundment and landfill. If the plant determines that a sample from one or more collection points are representative of an 

individual pond/impoundment or landfill, then the plant may simply collect the representative sample(s). The plant should collect 

samples from each sampling location once per week for four consecutive weeks, or as soon thereafter as sufficient leachate is 

available for collection. 

Sampling data and the completed Part G of the questionnaire shall be submitted to EPA no later than 120 calendar days after 

receiving the questionnaire. 

Collect process wastewater samples of untreated and/or treated leachate streams generated from pond(s)/impoundment(s) and 

landfill(s) used for the storage, treatment, or disposal of residues or by-products (or sludges or water streams containing the residues 

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

gas desulfurization (FGD) system residues (this includes liquid-borne material and solid material).

G-5 Approved: May 20, 2010
Steam Electric Questionnaire Part G. Leachate Sampling Data for Ponds/Impoundments and Landfills

• Metals (total recoverable; antimony, 

arsenic, beryllium, cadmium, 

chromium, cobalt, copper, lead, 

manganese, molybdenum, nickel, 

selenium, silver, thallium, vanadium, 

and zinc)

EPA Method 200.8

• Metals (total recoverable: aluminum, 

barium, boron, calcium, iron, 

magnesium, sodium, tin, and titanium)

EPA Method 200.7 or 200.8

• Mercury EPA Method 1631E

• Chlorides 40 CFR Part 136-approved 

• Sulfates 40 CFR Part 136-approved 

• Total dissolved solids (TDS) 40 CFR Part 136-approved 

• Total suspended solids (TSS) 40 CFR Part 136-approved 

• pH 40 CFR Part 136-approved 

• Must have data from leachate generated from each pond/impoundment and landfill where leachate is collected;

• Must have at least four samples of untreated and/or treated leachate, where each sample is collected at least five 

days apart; and

• Must have tested for every analyte listed above using the specified analytical methods.

The following analytes and analytical methods must be used for the sample analysis:

2. The plant personnel are unable to collect the samples safely.

Each company or plant is responsible for identifying and contracting an analytical laboratory to perform the analyses. 

A plant may be exempt from the leachate sample collection (and skip to Question G3-2) if one of these two circumstances is true:

1. The plant can provide previously collected leachate characterization data if it fulfills the following data requirements:

APPLICABILITY

G-6 Approved: May 20, 2010
Steam Electric Questionnaire Part G. Leachate Sampling Data for Ponds/Impoundments and Landfills

Jezebele Alicea

US EPA

Engineering and Analysis Division

Mail Code: 4303T

1200 Pennsylvania Avenue, N.W. 

Washington, DC 20460

alicea.jezebele@epa.gov

SAMPLE LOCATION 

Collect untreated and/or treated leachate samples from each pond/impoundment unit and landfill for which you responded "yes" in 

Question G2-1.

If the pond/impoundment unit and/or landfill has multiple collection points, the untreated sample may be collected from a common 

header area, if applicable. If there is not a common header area for the pond/impoundment or landfill, the plant may select one of the 

collection points that is "representative" of the pond/impoundment or landfill from which to collect the sample. If warranted due to the 

characteristics of the pond/impoundment or landfill, the plant may need to collect samples from more than one collection point to 

obtain representative samples. If the plant collects the samples from one ”representative” collection point, describe how the company

or plant determined the collection point is “representative” of all of the collection points in the “Part G Comments” tab located at the 

end of Part G. 

If you believe you are exempt, you must submit a written explanation justifying one or both of these two circumstances 

within two weeks after receiving the questionnaire by e-mail (preferred) or mailed to: 

EPA will then determine if the plant is exempt from the leachate sample collection requirement. If the plant can provide previously

collected leachate characterization data, then the plant should complete Section 4 (Questions G4-1 and G4-2) and continue to Section 

5 (Question G5-1). Also, the plant must provide the leachate sampling data in Table G-4 found in the "Part G Sampling Results" tab. 

If the plant cannot collect the samples safely, then the plant should skip Section 4 and continue to Section 5 (Question G5-1).

The untreated leachate samples must be collected directly from the leachate collection system or holding tank prior to any form of 

treatment. The treated leachate samples must be collected from the effluent from a leachate treatment system that is designed for the 

purpose of removing pollutants or process wastewater constituents, other than suspended solids, prior to discharge or commingling 

with other process wastewaters. 

G-7 Approved: May 20, 2010
Steam Electric Questionnaire Part G. Leachate Sampling Data for Ponds/Impoundments and Landfills

CBI? G3-2.

CBI? G3-3.

SAMPLE FREQUENCY 

Collect one sample of untreated leachate (and one sample of treated leachate if appropriately identified by responses in Question G2-

4) once per week for four weeks, or as soon thereafter as sufficient leachate is available for collection, from each pond/impoundment 

unit and landfill. Please note that the samples must be collected at least five days after the previous sample was collected. If the 

pond/impoundment or landfill does not generate leachate weekly, please collect the samples as soon as the leachate is generated, but 

allow at least five days between samples. 

Please attach an aerial photograph or drawing showing the entire waste management unit (i.e., pond/impoundment unit or landfill) that 

shows the boundaries and identifies all leachate collection points and the active and inactive areas of the pond/impoundment or 

landfill. Also, indicate the leachate sample location(s) used for this sample collection in the aerial photograph or drawing of the 

pond/impoundment unit or landfill. 

Please identify the leachate sample locations used for this sample collection in the block diagram previously requested in Question F4-

2. 

QUALITY ASSURANCE/QUALITY CONTROL 

Example 2: If a plant collects both untreated and treated leachate from both a pond/impoundment unit and a landfill, and 

each separately has a single leachate collection point and they have separate treatment systems, the plant is required to 

collect a total of sixteen samples.

Follow the method-specified quality assurance/quality control analyses and attach a data review summary once the analyses are 

complete. 

SAMPLE ANALYSES 

After receiving the analytical results from the laboratory, enter the analytical data into the “Part G Sampling Results” tab. Report all 

results, including those below the reporting limit. Identify results that are less than the method detection limit (MDL), and results that 

are between the detection and reporting limits . For example, if the MDL is equal to 5 ng/L, the reporting limit is equal to 15 ng/L, and 

the value reported by the laboratory is 12 ng/L, report 12 ng/L as the measured value and identify and describe any qualifiers on the 

data in the corresponding column. If the measured value is not detected, list the detection limit value and select the less than (<) 

symbol in the non-detect indicator column.

Example1: If a plant collects only untreated leachate from a pond/impoundment unit, and the samples are obtained from a 

single leachate collection point, the plant is required to collect a total of four samples.

Yes

Yes

I have attached the aerial photograph

I did not attach the aerial photograph. Explain why:

Leachate sampling collection locations identified on the block diagram requested in Part F, Question F4-2.

G-8 Approved: May 20, 2010
Steam Electric Questionnaire Part G. Leachate Sampling Data for Ponds/Impoundments and Landfills

Plant ID: Insert Plant ID

Plant Name: Insert Plant Name

Part: G

Section Title:

 Instructions:

G4-1.

Pond/Impoundment 

Unit or Landfill ID 

(Use IDs from Tables 

A-4 and A-6)

Sample Collection 

Location Description

Date of Sample 

Collection 

(mm/dd/yyyy)

Leachate Treatment System ID:

CBI? Leachate Treatment System ID:

CBI? Leachate Treatment System ID:

CBI? Leachate Treatment System ID:

CBI? Leachate Treatment System ID:

Common header area

Table G-1. Sample Collection Information

In Table G-1, provide a description of the sample collection location, the date the sample was collected, the flow rate of the leachate 

stream from the collection point (select the units of the flow rate), and identify if the leachate stream is treated or untreated. If the 

leachate sample is treated, provide the leachate treatment system ID previously identified in Table F-5.

Sample Collection Location

Example 1/25/2010

Complete Table G-1 for each pond/impoundment unit and landfill that requires leachate sampling and is 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 or petroleum coke, including, but not limited to, fly ash , bottom ash , boiler slag, or flue gas desulfurization (FGD) system residues. 

This includes liquid-borne material and solid material. Enter the pond/impoundment unit or landfill ID in the first column of Table G-1 (use 

pond/impoundment unit and landfill IDs assigned in Table A-4 and Table A-6). Please provide all free response answers in the 

highlighted yellow areas.

Collect daily rainfall data starting two weeks prior to collection of the first sample through the day of the last sample collected and enter 

the date and inches of rainfall in Table G-2.

4. Sample Collection Information

Yes

Yes

Yes

Yes

G-9 Approved: May 20, 2010
Steam Electric Questionnaire Part G. Leachate Sampling Data for Ponds/Impoundments and Landfills

CBI? G4-2. 

Date 

(mm/dd/yyyy) Inches of Rainfall

Date 

(mm/dd/yyyy) Inches of Rainfall

Table G-2. Rainfall Data

In Table G-2, provide the inches of rainfall accumulated at the plant on a daily basis starting two weeks prior to the collection of the first 

Yes leachate sample through the last day of sample collection.

G-10 Approved: May 20, 2010
Steam Electric Questionnaire Part G. Leachate Sampling Data for Ponds/Impoundments and Landfills

Plant ID:

Plant Name:

Part: G

Section Title:

 Instructions:

G5-1.

Pond/Impoundment 

Unit or Landfill ID 

(Use IDs from Tables 

A-4 and A-6)

CBI? tons tons tons

tons tons tons

tons tons tons

CBI? tons tons tons

tons tons tons

tons tons tons

CBI? tons tons tons

tons tons tons

tons tons tons

CBI? tons tons tons

tons tons tons

tons tons tons

CBI? tons tons tons

tons tons tons

tons tons tons

Insert Plant ID

Insert Plant Name

5. Waste Information

Complete Table G-3 for each pond/impoundment unit and landfill , including those located on non-adjoining property, that is 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 or petroleum coke, including, but not limited to, fly ash , bottom ash , boiler 

slag, or flue gas desulfurization (FGD) system residues. This includes liquid-borne material and solid material. Enter the pond/impoundment unit or landfill ID in the first column of Table G3 (use pond/impoundment unit and landfill IDs assigned in Table A-4 and Table A-6). Please provide all free response answers in the highlighted yellow areas.

Make a copy of Section 5 to complete as many tables as needed to provide information for all pond/impoundment units and landfills, including those located on non-adjoining property, 

using the "Copy Section 5" button below. 

In Table G-3, indicate all process wastes, residues or by-products that are stored, treated, and/or disposed of in each pond/impoundment unit and/or landfill [Check all that apply]. Please 

provide any additional wastes not listed by selecting “Other” and specifying the process waste, residue, or by-product in the highlighted yellow space provided. Complete as many rows of 

the table as needed to represent all pond/impoundment units and landfills at the plant. If more rows are needed, make additional copies of Table G-3 and complete as many tables as 

needed to provide information for all pond/impoundment units and landfills identified in Table A-4 and A-6.

Type and Amount of Waste

Table G-3. Waste Information

Fly ash

Bottom ash

Boiler slag

FGD Calcium Sulfate (Gypsum)

FGD Calcium Sulfate - Not Pozzolanic

FGD Pozzolanic Material

Other:

Other:

Other:

FGD Calcium Sulfate (Gypsum)

FGD Calcium Sulfate - Not Pozzolanic

FGD Pozzolanic Material

FGD Calcium Sulfate (Gypsum)

FGD Calcium Sulfate - Not Pozzolanic

FGD Pozzolanic Material

FGD Calcium Sulfate (Gypsum)

FGD Calcium Sulfate - Not Pozzolanic

FGD Pozzolanic Material

FGD Calcium Sulfate (Gypsum)

FGD Calcium Sulfate - Not Pozzolanic

FGD Pozzolanic Material

Other:

Other:

Other:

Other:

Other:

Other:

Other:

Other:

Other:

Other:

Other:

Other:

Fly ash

Bottom ash

Boiler slag

Fly ash

Bottom ash

Boiler slag

Fly ash

Bottom ash

Boiler slag

Fly ash

Bottom ash

Boiler slag

Yes

Yes

Yes

Yes

Yes

Copy Section 5

G-11 Approved: May 20, 2010
Steam Electric Questionnaire Part G. Leachate Sampling Data for Ponds/Impoundments and Landfills

Plant ID: Insert Plant ID

Plant Name: Insert Plant Name

Pond/Impoundment Unit or Landfill ID: Insert ID

Sample Collection Location:

Part: G

Section Title:

 Instructions:

CBI?

CBI?

CBI?

Name of Analyte CAS Number

NonDetect 

Indicator

Concentration* 

(μg/L)

Method Detection 

Limit (MDL) (μg/L)

Reporting Limit 

(μg/L) Qualifiers for the Measurement

Other:

Other:

Other:

Other:

Other:

Other:

Other:

Other:

Calcium 7440-70-2 Other:

Boron 7440-42-8

Cadmium 7440-43-9

Beryllium 7440-41-7

Analytical Method Used

7440-36-0

Arsenic

Barium 7440-39-3

Laboratory Analytical Data Form

Aluminum 7429-90-5

Example - Arsenic 7440-38-2 350 2

Complete Table G-4 for each untreated and treated sample collection locations. Enter the pond/impoundment unit or landfill ID (use pond/impoundment unit and landfill IDs assigned in Table A-4 

and Table A-6) and the sample collection location (identified previously in Table G-1) in the spaces provided above. Also, identify the name of the analytical laboratory that conducted the analyses 

and provide the sample collection location description previously identified in Table G-1. Report all results, including those below the reporting limit. Identify results that are less than the method 

detection limit (MDL), and results that are between the detection and reporting limits. For example, if the MDL is equal to 5 ng/L, the reporting limit is equal to 15 ng/L, and the value reported by the 

laboratory is 12 ng/L, report 12 ng/L as the measured value and identify and describe any qualifiers on the data in the corresponding column. If the measured value is not detected, list the detection 

limit value and select the less than (<) symbol in the non-detect indicator column. Please provide all free response answers in the highlighted yellow areas.

Make a copy of Sampling Results Table for the each pond/impoundment unit and landfill chosen for the leachate sample collection using the "Copy Sampling Results Table" button below.

7440-38-2

Table G-4. Leachate Sampling Analytical Data Form

Name of analytical laboratory:

Sample collection location description:

Antimony

10

Detected in laboratory blank at less 

than 5 times the sample result

Yes

Copy Sampling Results Table

Data review summary attached.

Yes

Yes

G-12 Approved: May 20, 2010
Steam Electric Questionnaire Part G. Leachate Sampling Data for Ponds/Impoundments and Landfills

Other:

Other:

Other:

Other:

Other:

Other:

Other:

Other:

Other:

Other:

Other:

Other:

Other:

Other:

Other:

Other:

Other:

Other:

Other:

Other:

Other:

Other:

Other:

7439-97-6

No CAS 

No CAS

7440-28-0

7440-31-5

7440-32-6

7440-62-2

7440-66-6

7439-95-4

7439-98-7

7440-02-0

7782-49-2

7440-22-4

7440-23-5

No CAS 

No CAS 

No CAS

7440-47-3

7440-48-4

7440-50-8

7439-89-6

7439-92-1

7439-95-4

Zinc

Mercury

Chlorides

Total dissolved solids (TDS)

Total suspended solids (TSS)

pH

Sodium

Sulfate

Thallium

Tin

Titanium

Vanadium

Magnesium

Manganese

Molybdenum

Nickel

Selenium

Silver

Chromium

Cobalt

Copper

Iron

Lead

*If not detected, list the detection limit value and select the less than (<) symbol in the non-detect indicator column.

G-13 Approved: May 20, 2010
Steam Electric Questionnaire Part G. Leachate Sampling Data for Ponds/Impoundments and Landfills

Plant Name: Insert Plant ID

Plant ID: Insert Plant Name

Part: G

Section Title: Part G Comments

Instructions:

Question Number

CBI?

CBI?

CBI?

CBI?

CBI?

CBI?

CBI?

CBI?

CBI?

CBI?

CBI?

CBI?

CBI?

Comment

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). 

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

G-14 Approved: May 20, 2010
Steam Electric Questionnaire Part G. Leachate Sampling Data for Ponds/Impoundments and Landfills

CBI?

CBI?

CBI?

CBI?

CBI?

CBI?

CBI?

CBI?

CBI?

CBI?

CBI?

CBI?

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

G-15 Approved: May 20, 2010