# Sampling Episode Report

Mirant Mid-Atlantic, LLC’s

Dickerson Generating Station

Dickerson, MD

Sampling Episode 6562

Prepared for:



# U.S. Environmental Protection Agency

Engineering and Analysis Division

Office of Water

1200 Pennsylvania Avenue, NW

Washington, D.C. 20460

Prepared by:



# Eastern Research Group, Inc.

14555 Avion Parkway

Suite 200

Chantilly, VA 20151

13 December 2011

EPA Contract No. 68-C-02-095

Work Assignment 9-29

# i CONTENTS

Page

1. I NTRODUCTION 

# ................................................................................................................. 1-1

1.1 Background of Detailed Study ............................................................................. 1-1

1.2 Power Plant Site Selection ................................................................................... 1-1

1.3 Sampling Episode Overview................................................................................ 1-2

2. F ACILITY 

# O VERVIEW 

# ........................................................................................................ 2-1

2.1 FGD Scrubber Systems ........................................................................................ 2-2

2.2 FGD Wastewater Trea tment System ................................................................... 2-2

2.2.1 Physical/Chemical Separation ................................................................. 2-3

2.2.2 Biological Sequencing Batch Reactors .................................................... 2-4

2.2.3 Sampling Points ....................................................................................... 2-5

3. S AMPLE 

# C OLLECTION 

# ....................................................................................................... 3-1

3.1 Sampling Points, Sample Collection Me thods, and Field Measurements ........... 3-1

3.1.1 Influent to FGD Wastewater Treatment System ...................................... 3-2

3.1.2 Influent to the SBR .................................................................................. 3-3

3.1.3 Effluent from the SBR ............................................................................. 3-6

3.2 List of Analytes and Sample Preservation ........................................................... 3-9

3.3 Plant Operational Data ....................................................................................... 3-10

3.4 Deviations from the Sampling and Analysis Plan ............................................. 3-10

4. L ABORATORY 

# A NALYTICAL 

# R ESULTS AND 

# D ISCUSSION 

# ................................................... 4-1

5. D ATA 

# Q UALITY 

# ................................................................................................................. 5-1

5.1 Analytical Quality Control ................................................................................... 5-1

5.2 Field Quality Control ........................................................................................... 5-1

5.2.1 Bottle Blanks ............................................................................................ 5-1

5.2.2 Equipment Blanks .................................................................................... 5-2

5.2.3 Field Blanks ............................................................................................. 5-2

5.2.4 Field Duplicates ....................................................................................... 5-4

6. R EFERENCES 

# ..................................................................................................................... 6-1

Appendix A: A NALYTICAL 

# R ESULTS



# Appendix B: D ATA 

# R EVIEW 

# N ARRATIVES



# Appendix C: P ICTURES 

# F ROM THE 

# S AMPLING 

# E PISODE

# ii LIST OF TABLES

Page

Table 3-1. Sample Collection Information, Dickerson .............................................................. 3-12

Table 3-2. Sample Collection at Dickerson Steam Station ........................................................ 3-14

Table 3-3. Field Measurements, Dickerson ............................................................................... 3-15

Table 3-4. Crosswalk of Sample Number to Sampling Point and Day, Dickerson ................... 3-17

Table 3-5. Analytical Me thods, Dickerson ................................................................................ 3-18

Table 3-6. Summary of Sample Container and Planned Preservation, Dickerson .................... 3-19

Table 3-7. Sample Preservati on Summary, Dickerson .............................................................. 3-20

Table 3-8. Generating Unit Operating Characteris tics during Sample Collection, Dickerson .. 3-23

Table 3-9. FGD Scrubber System Operat ing Characteristics, Dickerson .................................. 3-24

Table 3-10. Coal Usage during Samp le Collection, Dickerson ................................................. 3-25

Table 3-11. Scrubber Slurry Information du ring Sample Collection, Dickerson ...................... 3-25

Table 3-12. FGD Wastewater Tr eatment System Operation Information, Dickerson .............. 3-26

Table 4-1. Influent to FGD Wastewat er Treatment System, Dickerson ..................................... 4-3

Table 4-2. Influent to the SBR System, Dickerson ..................................................................... 4-6

Table 4-3. Effluent from th e SBR System, Dickerson .............................................................. 4-10

Table 4-4. Classical Polluta nts 4-Day Average Data Summary for FGD Wastewater

Treatment System, Dickerson ........................................................................................ 4-13

Table 4-5. Metal Pollutants 4- Day Average Data Summary fo r FGD Wastewater Treatment

System, Dickerson ......................................................................................................... 4-1 4

Table 5-1. Field Blank Analy tical Results, Dickerson ............................................................... 5-5

Table 5-2. Field Duplicate Results – Influent to S BR System, Dickerson ................................. 5-6

Table 5-3. Field Duplicate Results – Effluent from SB R System, Dickerson ............................ 5-9

Table A-1. Influent to FGD Wastewater Treatment System, Day 1 Analytical Results,

Dickerson ..................................................................................................................... ... A-1

Table A-2. Influent to FGD Wastewater Treatment System, Day 2 Analytical Results,

Dickerson ..................................................................................................................... ... A-4

# LIST OF TABLES (Continued)

Page

iii Table A-3. Influent to FGD Wastewater Treatment System, Day 3 Analytical Results,

Dickerson ..................................................................................................................... ... A-7

Table A-4. Influent to FGD Wastewater Treatment System, Day 4 Analytical Results,

Dickerson ..................................................................................................................... . A-10

Table A-5. Influent to SBR System, Day 1 Analytical Results, Dickerson ............................. A-13

Table A-6. Influent to SBR System, Day 2 Analytical Results, Dickerson ............................. A-16

Table A-7. Influent to SBR System, Day 3 Analytical Results, Dickerson ............................. A-19

Table A-8. Influent to SBR System, Day 4 Analytical Results, Dickerson ............................. A-22

Table A-9. Effluent from SBR System, Day 1 Analytical Results, Dickerson ....................... A-25

Table A-10. Effluent from SBR System, Day 2 Analytical Results, Dickerson ..................... A-28

Table A-11. Effluent from SBR System, Day 3 Analytical Results, Dickerson ..................... A-31

Table A-12. Effluent from SBR System, Day 4 Analytical Results, Dickerson ..................... A-34

Table A-13. Duplicate of Influe nt to SBR System, Day 3 Analy tical Results, Dickerson ...... A-37

Table A-14. Duplicate of Effluent from SB R System, Day 2 Analytical Results,

Dickerson ..................................................................................................................... . A-40

Table A-15. Bottle Blank and Equipment Bl ank Analytical Data, Dickerson ......................... A-43

Table A-16. Influent to FGD Wastewater Treatment System Field Blank, Day 1 Analytical

Results, Dickerson ........................................................................................................ A-4 8

Table A-17. Influent to SBR Sy stem Field Blank, Day 1 Analy tical Results, Dickerson ....... A-50

Table A-18. Influent to SBR Sy stem Field Blank, Day 2 Analy tical Results, Dickerson ....... A-52

Table A-19. Influent to S BR System, Day 3 Analytical Results, Dickerson ........................... A-53

Table A-20. Influent to S BR System, Day 4 Analytical Results, Dickerson ........................... A-54

Table A-21. Effluent from SBR System, Day 1 Analytical Results, Dickerson ..................... A-55

Table A-22. Effluent from SBR System, Day 2 Analytical Results, Dickerson ..................... A-57

Table A-23. Effluent from SBR System, Day 3 Analytical Results, Dickerson ..................... A-58

Table A-24. Effluent from SBR System, Day 4 Analytical Results, Dickerson ..................... A-59

# iv LIST OF FIGURES

Page

Figure 2-1. Simplified Diagram of the FGD Wastewater Treatment System, Dickerson

Generating Station ........................................................................................................... 2-7

Figure 2-2. Physical/Chemical Separation and Biological Reactor Portion of FGD

Wastewater Treatment System, Di ckerson Generating Station ....................................... 2-8

Figure C-1. Sampler Working Inside a “Cleanbox” ....................................................................C-1

Figure C-2. Sample Set Up at the Influent to the FGD Wastewater Treatment System ..............C-2

Figure C-3. Composite Sample Collection Set Up at the Influent to the SBR System ...............C-3

Figure C-4. Composite Sample Collection Set Up at the Effluent from the SBR System ..........C-4

# 1-1 1. I NTRODUCTION



# The Engineering and Analysis Division (EAD) of the U.S. Environmental Protection

Agency (EPA) is conducting a sampling program at steam electric power plants. The sampling

program will characterize raw wastewaters generate d by coal-fired steam electric power plants

and evaluate treatment technologi es and best management practic es used to reduce pollutant

discharges. This Sampling Episode Report (SER ) describes the sampling activities that took

place August 22 - 27, 2010, at Mirant Mid-Atla ntic, LLC’s Dickerson Generating Station

(Dickerson), located in Dick erson, Maryland (Sampling Episode 6562). The focus of Episode

6562 was to characterize the purge stream ente ring the flue gas desulfurization (FGD)

wastewater treatment system and the influent to and effluent from the sequencing batch reactor

(SBR) system. The influent to the SBR also represents the effluent from the chemical

precipitation system.

1.1 Background of Detailed Study

During EPA’s recently completed detailed study of the steam electric industry, EPA

identified metals and certain other constituents pr esent in the wastewater discharges from steam

electric power plants that substantially cont ribute to the toxic load ings for the industry.

Additionally, EPA determined that one of the wa ste streams contributing most of these toxic

loadings are associated with wet flue gas desu lfurization (FGD) systems present at coal-fired

power plants. Based on these findings, EPA ha s focused the sampling program on characterizing

the untreated FGD wastewaters a nd effluent quality from tec hnologies designed to treat the

wastewater.

1.2 Power Plant Site Selection

EPA selected steam electric plants for F GD wastewater sampling based on the process

configurations and characte ristics of the plants.

Dickerson was selected by EPA for sampling ba sed on the following site characteristics:

 

# The plant is a coal-fired pow er plant that burns eastern bituminous coal in each of

its three generating units;

 

# The plant operates limestone forced oxid ation wet FGD systems on all three units;

 

# The plant operates a segregated FGD wastewater treatment system, which

includes the following steps:

— Equalization,

— pH adjustment (lime addition),

— Ferric chloride addition,

— Polymer addition,

— Clarification,

— Filtration,

— Biological treatment (nitrogen removal);

# 1-2  

# The plant operates select ive non-catalytic reduction (S NCR) systems on all three

units; and

 

# The plant produces a commerc ial-grade gypsum by-product.

1.3 Sampling Episode Overview

EPA and its technical contractor, Eastern Research Group, Inc. (ERG) conducted a oneday pre-sampling site visit at Dickerson on March 9, 2010 as part of the detailed study. The

information collected during the pre-sa mpling site visit was used to create Sampling Plan,

Mirant Mid-Atlantic, LLC’s Dickerson Generating Station (Sampling Plan) [1], which describes

the sample collection procedures used during the sampling episode.

On Sunday, August 22, 2010, EPA arrived at Dick erson to meet with plant personnel,

receive on-site safety training, review the sa mpling points, and determine the set-up for the

sample collection. EPA and ERG collected the samples specified in the Sampling Plan on

Monday through Friday (August 23 – 27, 2010). The following personnel participated in EPA’s

sample collection activities:

 

# Ron Jordan, EPA/EAD;

 

# Jezebele Alicea, EPA/EAD;

 

# Meghan Camp, ERG;

 

# Holly Cannon, ERG;

 

# TJ Finseth, ERG;

 

# Kavya Kasturi, ERG; and

 

# Elizabeth Sabol, ERG.

In addition, during the sample collection, EPA collected split sample s with the Utility

Water Act Group (UWAG). UWAG is a trade asso ciation for the electric power generating

industry. During the sampling episod e, UWAG acted as Dickerson’ s representative and collected

samples on behalf of the plant.

# 2-1 2. F ACILITY 

# O VERVIEW



# Dickerson operates three steam electric generati ng units and each has a coal-fired boiler.

Units 1, 2, and 3, which came on line in 1959, 1960, and 1962, respectively, each have a capacity

of 182 megawatts (MW). All three generating units burn eastern bituminous coal. Dickerson also

has two combustion turbines on site that ar e 167 MW each. The Dickerson plant and supporting

facilities are located on approximately 1,000 acres in Dickerson, MD, near the Potomac River.

Mirant owns 800 acres for the plant and the other 200 acres are owned by Pepco for switch

yards, right-of-ways, etc.

In December 2009, Dickerson retrofitted a ll three units with a common wet FGD

scrubber system to contro l the sulfur dioxide (SO 2 

# ) releases from the plant. The wet FGD

scrubber is designed to remove more than 95 percent of SO 2 

# from the flue gas. With the addition

of the FGD scrubber system, Dickerson also inst alled an FGD wastewater treatment system to

control the discharges of the wastewater gene rated during the operation of the FGD scrubber.

Sections 2.1 and 2.2 further discuss the FGD scr ubber system and the FGD wastewater treatment

system, respectively.

Dickerson retrofitted Units 1, 2, and 3 with SNCR systems in July 2009, to control

nitrogen oxide (NO

x 

# ) releases from the plant. Dickers on only operates the SNCR systems during

ozone season, May 1 through September 30.

The three electrostatic preci pitators (ESPs) and one comm on baghouse at Dickerson are

particulate control devices that are designed to remove 99.5 and 99.8 percent of the fly ash and

other particulates from the flue gas, respectiv ely. Dickerson utilizes E SPs and the baghouse to

remove the fly ash from all three units. Forty pe rcent of the flue gas fr om each unit goes to the

individual unit’s ESP, while the remaining 60 per cent is routed to the common baghouse. The fly

ash and other particulates are collected in hoppers and are pneumatically transferred to fly ash

silos.

Units 1, 2, and 3 have the following configuration:

 

# Boiler (ammonia injectio n for SNCR system);

 

# Air preheater;

 

# ESP (unit-specific) a nd baghouse (common); and

 

# FGD scrubber system (common).

Between 0134 and 0326 on Tuesday morning, which is prior to the end of the day 1 24-

hour sample compositing period, Dickerson shut down all three generating units due to lack of

electricity demand 1 

# . The station continued to operate th e FGD wastewater treatment system at

reduced flow rates and EPA continued to coll ect samples as planned through the end of the

sampling episode. Additionally, the FGD system wa s shut down, but the pl ant occasionally blew

down from the scrubber and opera ted the dewatering equipment to allow EPA to collect the

influent samples. The sampling team monitored flow rates during the remainder of the sampling

episode. The generating station and FGD scrubber did not resume operation until after the end of

the sampling episode.

1 

# Unit 3 was shut down at 0134, Unit 1 was shut down at 0312, and Unit 2 was shut down at 0326 on August 24,

2010.

# 2-2 2.1 FGD Scrubber Systems

Dickerson operates one wet FGD scrubber system that treats the flue gas from all three

coal-fired generating units. The plant uses limesto ne slurry as the sorbent for sulfur dioxide

absorption. Limestone and service water are fe d to on-site ball mills, which pulverize the

limestone to create the slurry. From the ball mills, th e slurry is transferred to classifiers to collect

limestone particles that are too large for us e in the FGD system. The underflow from the

classifiers is sent back to the ball mill for additional processing. The overflow from the

classifiers, which is approximately 28 percent soli ds (by weight), is tran sferred to the limestone

slurry storage tank and then used as fr esh limestone slurry in the absorber.

The fresh limestone slurry is fed to the reac tion tank of the FGD system where the slurry

is pumped to the various levels of the FGD sc rubber with the recycle pumps. The FGD system

has three levels of flooding headers. The floodi ng headers supply the slurry to the dual flow

tray. As the slurry falls downward in the scrubber vessel, the flue gas flows countercurrent to the

limestone slurry. The droplets of the slurry contact the flue gas and absorb the SO 2 

# , which reacts

with the limestone particles a nd produces calcium sulfite. Th e droplets continue to flow

downward in the scrubber until they settle on the dual flow tray, form ing a layer of slurry that the

flue gas must pass through to exit the FGD system. The spray droplet s continue to flow

downward in the scrubber until they reach the reaction tank. Dickerson bubbles air through the

reaction tank to oxidize the calcium sulf ite to calcium sulfate (i.e., gypsum).

Dickerson controls the chlorides concentra tion in the scrubber to less than 20,000 parts

per million (ppm). Typically, the chlorides concen tration in the scrubber is about 15,000 ppm.

The solids concentration in the scrubber ranges from 18 to 22 percent solids. Dickerson transfers

the blowdown from the scrubber to the gypsum dewatering operations.

The scrubber blowdown is pumped to the pr imary hydrocyclones where the solid gypsum

is separated from the water by centrifugal force. Th e solid gypsum is forced outward to the walls

of the hydrocyclones and falls downward, while the water exits the top of the hydrocyclones.

The gypsum from the primary hydrocyclones is tr ansferred to the vac uum filter belts. The

overflow from the primary hydrocyclones is pumped to the secondary hydrocyclones. The

underflow from the secondary hydrocyclones is sent to the FGD filtrate tank for recycle back to

the absorber. The overflow from the secondary hydr ocyclones is sent to the purge tank and then

pumped to the FGD wastewater treatment system.

Dickerson washes the gypsum sent to the vac uum filter belts with service water, as the

gypsum is poured onto the belts. The vacuum filter belts dry the gypsum to a moisture content of

approximately 10 percent. Dickerson has a 20-ye ar contract to sell gypsum that is 94 to 99

percent pure, has a moisture content of less than 9 percent, and has less than 100 ppm chlorides.

Off-specification (“off-spec”) gypsum and other solids are sent to a waste management site in

Virginia. Dickerson generated 2 or 3 days of off-specification gypsum at the beginning of the

FGD start up, but has always met the specifica tions since that time. Dickerson expects to

generate approximately 150,000 tons of gypsum per year.

2.2 FGD Wastewater Treatment System

The FGD wastewater treatment system is de signed to receive intermittent transfers of

FGD wastewater from the purge tank, which contains secondary hydrocyclone overflow, at a

# 2-3 typical flow rate of 75 gallons per minute (gpm ) and a design maximum flow rate of 110 gpm.

The plant typically transfers FGD purge to the wast ewater treatment system four to six times per

day, depending on the unit loading. The average to tal daily flow rate is approximately 84,000

gallons per day (gpd) and the maximum daily flow rate is 158,000 gpd.

The plant operates the FGD wastewater tr eatment system 24 hours per day. Dickerson

installed the wastewater treatment system to treat the FGD scrubbe r purge wastewater to meet its

permit limits, which include limits for total suspe nded solids (TSS), nitrogen, and fecal coliform.

The Dickerson FGD wastewater treatment system contains the following treatment operations:

 Physical/Chemical Separation;

— Equalization,

— pH adjustment (lime addition),

— Organosulfide addition,

— Ferric chloride addition,

— Polymer addition,

— Clarification;

— Hydrochloric acid addition; and

 Biological Reactors;

— Influent equalization,

— Cooling (heat extraction),

— Carbon source addition,

— Hypochloric acid addition,

— SBR process,

— Effluent equalization, and

— Filtration.

Figures 2-1 and 2-2, located at the end of this section, present proces s flow diagrams of

the FGD wastewater treatment system, as well as the sampling locations for EPA’s sampling

episode. Figure 2-1 is a simplified diagram of the FGD wastewater trea tment system, showing

different portions of the system. Figure 2-2 is a diagram of the chemical precipitation and

biological reactor po rtions of the treatment system.

The secondary hydrocyclone overflow from the scrubbers is transfe rred to the purge tank

and then sent to the equalization tank at the start of the wastew ater treatment system. During the

sampling episode, the FGD influent wastewat er was found to contain between 0.3 and 1.1

percent solids, had a pH of 6.5 to 7.5 S.U. and a temperature between 29 and 44 °C. The

equalization tank also receives water from the filtra te sump (which includes filter press filtrate,

backwash reject from the continuous backwash gr avity filters, building trench drains, and tank

overflow).

2.2.1 Physical/Chemical Separation

From the equalization tank, the wastewater enters reaction ta nk 1 in which lime slurry is

added to increase the pH to 8.3 S. U. to precipitate the soluble me tals as insoluble hydroxides and

oxyhydroxides. The plant also a dds organosulfide (i.e., TMT-15) to reaction tank 1 to form

sulfide complexes which have very low solubilit y products. Wastewater th en cascades by gravity

# 2-4 into reaction tank 2 in which ferric chloride is added to form a dense flocculant, enhance the

settling characteristics of the precipitate, and promote iron coprecipitation.

The plant adds an anionic polymer as the wastewater flows from reaction tank 2 to the

solids contact clarifier. The polymer is introduced at the inlet of the clarifier. The solids contact

clarifier contains a sludge bed th at facilitates removal of the so lids in the wastewater. In the

afternoon of day 3 of the sampling episode, th e clarifier sludge bed overturned. The condition

was identified by turbidity measurements and wa stewater treatment operators added polymer to

counteract the situation. At 1630 on August 25, the wastewater tr eatment operator stated that

turbidity levels were still el evated, although the polymer addition had reduced the turbidity. The

operator said that SP-2 day 1 and 2 samples shoul d be unaffected, but day 3 and 4 samples would

be affected. The sampling team monitored sample color and turbidity of the samples during the

remainder of the sampling episode.

As the clarifier overflow is transferred to the sequencing batch reactor (SBR) influent

equalization tank, the plant injects hydrochloric acid into the wastew ater to adjust the pH to 7

prior to the biological treatment system. After the hydrochloric acid addition, the wastewater

flows to the SBR influent equalization tank. The hydraulic residence time for the chemical

precipitation portion of the FGD wastewater treat ment system is approximately 16 hours, based

on operating level conditions.

The majority of the sludge from the clarif ier is transferred to a sludge holding tank;

however, the plant recycles approximately 50 to 60 gpm of clarifier sludge back to reaction tank

1 to act as seed crystals for gypsum nucleation. The plant maintains a TSS concentration of 5

percent solids in the outlet from reaction tank 1. The sludge in the sludge holding tank is pumped

to a filter press for dewatering. The filter press filtrate is sent to the filtrate sump. The filter press

cake is transferred to the waste management site in Virginia, where the FGD solids and off-spec

gypsum are sent. Dickerson performs approxima tely 5 filter press operations per day.

2.2.2 Biological Sequencing Batch Reactors

Water from the clarifier as well as the SBR decant flush and backwash reject from the

tertiary continuous backwash filte rs is transferred to the SBR in fluent equalization tank where it

is then pumped through heat exchangers. After the heat exchangers have reduced the temperature

of the water to approximately 95 degrees Fahrenheit, the wastewater is recycled back to the SBR

influent equalization tank. Hypoc hloric acid (to reduce the pH of the water) and a carbon source

(i.e., glycerin, to promote cell growth in the biol ogical treatment process) are also added to the

SBR influent equalization tank. The food to mass ra tio in the SBR system ranges from 4:1 to 8:1

depending on the desired mixed liquor volatile su spended solids concentration. Water is then

batch transferred to two 178,705 gallon SBR tanks operating in parallel.

Dickerson uses an SBR to biologically tr eat the wastewater to remove nitrogen by

nitrification and denitrificati on. Currently, the SBR tanks are open to the atmosphere, but the

plant has erected tarps to cover the tanks. Di ckerson plans to construct a building that will

enclose the SBR by the winter of 2010/2011. The pur pose of the tarps/build ing is to reduce the

heat loss that occurs during cold weather.

Each batch of the SBR consists of the following five cycles:

# 2-5  

# Fill

o Anoxic: Food is loaded into the basi n and soluble BOD is absorbed and

stored by the facultative biomass until air is received to metabolize the

food. Good settling, facultative organisms predominate.

o Aerated: Air is pumped in and mixed to initiate metabolism. During the

initial stages of Aerated Fill, both nitrification and denitrification occur.

The ammonia is converted to nitrates within the highly aerated plume of the

jet. The nitrates are converted to n itrogen gas in the low dissolved oxygen

areas of the basin. The denitrifyi ng organisms use the BOD as a food

source and the oxygen off the nitrates converting the nitrates to nitrogen

gas. A secondary denitrification phase can be inserted at any point during

the aerated cycle (Aerated Fill & Re act cycles). During this step, the

blowers are turned off and the jet pump continues to mix, providing anoxic

mixing to drive denitrification.

 

# React: No additional flow or food is added forcing the organisms to scour for any

remaining BOD. Aeration continues until complete biodegradation is achieved.

The cycle continues until the biomass enters its “famine” state at which time the

residual dissolved oxygen levels begin to rise quickly.

 

# Settle: No influent is introduced and no effluent is decanted allowing the biomass

to settle in quiescent conditions.

 

# Decant: An automatic valve is opened and the upper one-third of the basin is

discharged.

 

# Idle: While waiting to receive flow settled sludge is wasted.

During the decant cycle, the water is transf erred from the SBR to the SBR effluent

equalization tank. The hydraulic residence time of the biological portion of the wastewater

treatment system, including the eq ualization tanks, is approxim ately 16 hours. The hydraulic

residence time of the SBR itself is a minimum of four hours. From the S BR effluent equalization

tank, the wastewater is then pumped to continuo us backwash gravity filters. Backwash reject

returns to the SBR influent equalization tank for reprocessing. The filtered effluent is conveyed

via gravity to the treated water storage tank.

Water in the treated water storage tank is monitored for NPDES compliance prior to

commingling with the main cooling water disc harge. The commingled water then discharges

through a canal that carries it approximately 1⁄4 mile downstream where it is discharged through

Outfall 001 to the Potomac River.

2.2.3 Sampling Points

Figure 2-2 shows the sampling points for th e Dickerson sampling episode; they are

summarized below:

 

# A sample of the purge stream entering the FGD wastewater treatment system

downstream of the purge tank and upstr eam of the equalization tank (i.e., the

sample was collected prior to any ch emical addition or treatment system

recirculation flow streams);

# 2-6  

# An in-process sample of the influent to the SBR, at the heat exchanger tank pump

discharge sample tap (a fter HCl addition); and

 

# A sample of the effluent from the SBR, downstream of the continuous backwash

gravity filters and upstream of treated water storage tank.

[QUESTION FOR DICKERSON: Pleas e confirm that the sampling point descriptions accurately

reflect the location of the sampling points.]

# 2-7Figure 2-1. Simplified Diagram ofthe FGD Wastewater Treatment System, Dickerson Generating Station

# 2-8Figure 2-2. Physical/Chemical Separation and Biological Reactor Portion of FGD Wastewater Treatment System, DickersonGenerating Station

# 2-9[QUESTION FOR DICKERSON: Pleaseconfirm that the sampling points are depicted accurately on the process flow diagram. Also confirmthe flow path between clarifier and SBR influentequalization tank. Also confirm HCl addition location.]

# 3-1 3. S AMPLE 

# C OLLECTION



# During the Dickerson sampling episode, th e sampling team followed the collection

protocols specified in the Sa mpling Plan. Section 3.1 describes the sampling points, sample

collection methods, and field measurements. Secti on 3.2 describes the list of analytes and the

sample preservation procedures. Section 3.3 discu sses the plant operational data collected during

the sampling episode. Finally, Section 3.4 discusse s any deviations from the planned sampling

activities.

3.1 Sampling Points, Sample Collectio n Methods, and Field Measurements

This section describes the sampling point s, sample collection methods, and field

measurements. Additional details are available in Section 3 of the Sampling Plan. Figures 2-1

and 2-2 of this report present flow diagrams of the plant’s wastewater treatment system,

including sampling point locations.

Table 3-1 lists the sampling points, sampli ng point descriptions, type of sample

collection, and sample collection dates and times. Table 3-2 list s the sampling point numbers and

descriptions, the number of samples collected, and the pollutant parameters for which the

samples were analyzed. Table 3-3 presents th e field measurement data collected from each

sampling point. Table 3-4 presents a crosswalk be tween the sample numbers used for laboratory

sample identification and the sample points for each day.

The sampling points for this episode were:

 

# SP-1 Influent to FGD Wastewater Treatment System;

 

# SP-2 Influent to the SBR;

 

# SP-3 Effluent from the SBR;

 

# SP-4 Duplicate of Influe nt to the SBR (SP-2);

 

# SP-5 Duplicate of Effluent from the SBR (SP-3);

 

# SP-6 Influent to FGD Wastewater Treat ment System (SP-1) Field Blank;

 

# SP-7 Influent to the SBR ( SP-2) Field Blank; and

 

# SP-8 Effluent from the SBR (SP-3) Field Blank.

For all the sampling points, EPA collected spl it samples with Dickerson’s representative

by inserting a “Y” splitte r into the sample tubing configurat ion at each sampling point to allow

for split sample collection. EPA collected all samples (other than mercury and cyanide) at all

sampling points as “true” splits (i.e., samp les for the same analyte were collected

simultaneously). The mercury and cyanide samples were collected directly from a sample tap;

therefore, for these samples, EPA and Dickerso n’s representative collected duplicate samples,

with one filling the bottle im mediately after the other.

At each of the sampling points, EPA collected metals sample fractions following EPA

Method 1669 collection protocols. To collect these samples, EPA samplers donned Tyvek®

coveralls and dust masks (dust masks were worn until all mercury samples had been collected).

In addition, EPA set up a “cleanbox,” which consists of a portable plastic rectangular box with a

shallow lip and a flip-top lid th at secures itself ope n with clips. The “cleanbox” is double-bagged

with a clear inner bag, enclosed in a translu cent outer bag. The “cleanbo x” is handled using

“clean hands / dirty hands” techniques, where by the inner bag is ha ndled only by the “clean

# 3-2 hands” sampler. When the “cleanbox” is opened, the sampler is able to position his/her hands in

the box and pull the bag over the open ing of the box, but is still able to see the sample bottles and

tubing. The “cleanbox” minimizes potential at mospheric contamination during sample

collection. Figure C-1, in Appendix C, is a pictur e of a sampler working inside a “cleanbox.”

The metals sample bottles were also double-bagged. To collect the metals samples, EPA

placed the sample bottles (while still in its seal ed inner bag) into the “cleanbox” following the

protocols specified in Method 1669, also referred to as “clean hands / dirty hands” protocols.

Sampling staff filled the sample container, then cl osed the sample bottle lid and sealed the inner

bag as quickly as possible with in the “cleanbox.” The bagged sample bottles were then removed

from the “cleanbox” and placed into the outer bag following the “clean hands / dirty hands”

protocols.

3.1.1 Influent to FGD Wastewater Treatment System

The influent to FGD wastewater treatment syst em (SP-1) was collected from a sample tap

located on the drain of the pump that transfers the FGD wastewater from the purge tank to the

equalization tank. Figure 2-2 identifies the sa mpling location for SP-1. This sample was

collected as a grab sample. Due to the relativel y high concentration of suspended solids, the FGD

purge was not amenable to collecting represen tative split samples using composite sampling

techniques. The sampling point was located insi de the FGD gypsum transfer building. Because

the sampling point was located inside, there were no wind or rain concerns during the sample

collection.

On Day 1 only, prior to collecting the sample s at the influent to the FGD wastewater

treatment system (SP-1), the sampling team collected field blanks (SP-6) for total mercury, total

and dissolved metals, and dissolved hexavalent chromium. See Section 5 .2.3 for a description of

the field blank sample collection procedures at the influent to the FGD wastewater treatment

system.

To collect the wastewater samples at the influent to the FGD wastewater treatment

system, the samplers attached a 10-foot length of silicone tubing to the sample tap on the

wastewater pump drain. The end of the silicone tubing was fitted with a “Y” splitter, with two

additional lengths of silicone tubi ng attached to the “Y” splitter. Figure C-2, in Appendix C, is a

picture of the sample set up at the influent to the FGD wastewater treatment system. The

samplers attached the silicone tubing to the samp le tap, opened the valve, and allowed sample to

flow through the tubing for two minutes before be ginning to fill sample containers. The samplers

did not close the valve until all samples were coll ected (except the dissolved metals samples).

The samplers collected the following samples using a “cleanbox,” as described in Section

3.1:

 

# Total and dissolved mercury;

 

# Total metals by 200.8; and

 

# Total metals by 200.7.

Samplers then filled a 10-liter container with sample to be pumped off later for collection

of dissolved metals sample fractions. After all samples were collected at the sampling point for

# 3-3 the day, the filled 10-liter container was transported to the staging area, put on ice, and then left

untouched to allow the solids in the wastewater to settle.

The sampling team collected an aliquot of sample for field testing. Sample pH and

temperature were measured immediately at the sa mpling point using four-color pH paper, a pH

meter, and a thermometer. Table 3-3 presents the field measurement data for the influent to the

FGD wastewater treatment system.

The samplers then filled containe rs for biochemical oxygen demand (BOD 5 

# ), Group I,

Group II, and total cyanide samples directly fr om the tubing without using a “cleanbox.” See

Table 3-6 for a list of Group I and Group II analytes. BOD 5 

# , Group I, Group II, and total cyanide

samples were immediately placed on ice after sa mple collection.

The total cyanide sample was immediately preserved. Lead acetate test strips and

potassium-iodide starch test stri ps were used to measure for su lfides and oxidants, respectively.

No sulfides or oxidants were detected during th e sampling episode. The samplers then preserved

the total cyanide sample with sodium hydroxide to a pH >10 S.U. and placed it on ice.

Samples for the dissolved metals analyses we re pumped from the previously filled 10-

liter container. The pump-off station consisted of a length of Teflon® tubing attached to a length

of silicone tubing, which was threaded through an ISCO peristaltic pump. The sampling team

attached a capsule filter to th e silicone tubing, which was a s hort distance downstream of the

pump. They then attached another short length of silicone tubing to the capsule filter effluent,

which was attached to a “Y” spli tter and two lengths of silicone tubing. This set-up allowed EPA

to collect “true” split samples with Dickerson’s representatives.

The sampling team placed the end of the Teflon® tubing into the 10-lit er container filled

with wastewater from the influent to the FGD wastewater treatment system. By this time, the

solids in the wastewater had been settling for approximately 80 to 90 minutes. Approximately 1-

1.5 liters 2 

# of sample were pumped through the tubing/ filter to purge the line before collecting

samples.

Samplers collected the following dissolved sa mples using a “cleanbox,” as described in

Section 3.1:

 

# Dissolved metals by 200.8;

 

# Dissolved metals by 200.7; and

 

# Dissolved hexavalent chromium;

Hexavalent chromium samples were immedi ately placed on ice after sample collection.

3.1.2 Influent to the SBR

The influent to the SBR (SP-2) was collected at the sample tap located at the heat

exchanger tank pump discharge to the SBR infl uent equalization tank. Dickerson installed a

three-way splitter on the sample tap, which had thr ee separate taps to collect samples from the

2 

# On days 1, 2, and 3, the filter/tubing was purged for 1 lite r. On day 4, the filter/tubing was purged for 1.5 liters.

There was no need to change the filter on any of the days.

# 3-4 sampling point. The sample tap was located outsi de (see Figure 2-2 for the sampling location for

SP-2). The sampling team set up a tent to cover the samplers/samples from rain and/or wind.

ERG collected the influent from the SBR composite samples using two automatic

compositors which were programmed to collect individual sample volum es into two 20-liter

containers. The compositors were programmed to collect 830 mL every hour during the 24-hour

composite period. Following the composite pe riod, ERG pumped off the specific sample

volumes into the individual sample containers.

ERG used one automatic compositor to collect sample volume for the metals analyses

(excluding mercury) and another automatic compos itor to collect sample volume for all classical

analytes (i.e., BOD 5 

# , Group I, and Group II, excluding cy anide). In addition to collecting

automatic composite samples for the analytes listed above, ERG collected total and dissolved

mercury grab samples every six hours during ea ch compositing period. ERG also collected one

grab sample for cyanide during each compositing period.

On day 1 only, ERG collected field blank samp les (SP-7) for hexavalent chromium, total

and dissolved metals by 200.7, and total and di ssolved metals by 200.8. See Section 5.2.3 for a

description of the field blank sample collection procedures at the influent to the SBR.

Samplers set up the compositors by attaching tw o T-splitter tubing sets to two of the taps

on the three-way splitter. The T-splitter tubing set consisted of three silicone tubes attached to a

T-splitter. The tubing configura tion was set up such that one e nd was connected to the sample

tap, one end was threaded through the automatic compositor, and connected to the large

composite container, and one end was placed next to a sump/drain near the sampling point. The

samplers attached the silicone tubing to the samp le tap, opened the valve, and allowed sample to

flow through both sets of tubing before calibrati ng either of the automatic compositors. This

ensured that the flow through the tubing during calibration would be the expected flow through

the tubing during sample collection. The automatic compositors were calibrated such that they

collected 830 mL every hour, so that the project ed complete volume would be 20 liters. After

calibration, the tubing was attached to a vented cap on a 20-liter composite container. The

sample tap was left open during the entire sample collection time period a nd flowed directly to

the sump/drain. The automatic compositor pulled sa mple from the flowing stream as dictated by

the sampling program and was capable of purging th e line back to the flowing stream between

each individual sample aliquot.

Both 20-liter composite containers were placed into plastic trash cans, and maintained on

ice for the entire 24-hour compositing period. A plas tic bag was placed on t op of the trash cans

to minimize contamination. Figure C-3, in Appendix C, is a picture of the composite sampling

set-up at the influe nt to the SBR.

Immediately after setting up the compositors, ERG collected the first set of the total and

dissolved mercury grab samples. At the first gr ab sample every day, ERG collected field blanks

for total mercury samples. See Section 5.2.3 for a de scription of the field blank sample collection

procedures at the influent to the SBR.

For mercury collection, samplers shrouded one of the three taps on the three-way splitter

(the other two taps were being used by the two compositors) with a clean plastic bag by

puncturing a hole in the bottom of the bag with the end of the tap and then securing it to the tap

# 3-5 with a ziptie. After pur ging the tap for two minutes, the samples were collected directly from the

tap into the sample bottles. Becau se total mercury and dissolved mercury samples were collected

directly from the tap, ERG was not able to collec t split samples with Dickerson’s representatives;

therefore, duplicate samples were collected. ER G collected another set of total and dissolved

mercury samples every six hours thereafter over the 24-hour period. The plastic shroud was

replaced for each set of mercury grab samples. After collecting each set of mercury grabs, ERG

filled a field test bottle and tested for pH and temperature using four-colored pH paper, a pH

meter, and a thermometer. Table 3-3 presents th e field measurement data for the influent to the

SBR.

After the collection of the thir d set of mercury grabs, ERG collected a total cyanide grab

sample from the same tap on the three-way splitt er that was used for mercury sample collection.

Because total cyanide samples were collected directly from the ta p, ERG was not able to collect

split samples with Dickerson’s representatives; th erefore, duplicate samples were collected. The

total cyanide sample was immediately preserved. Lead acetate test strips and potassium-iodide

starch test strips were used to measure for su lfides and oxidants, respectively. No sulfides or

oxidants were detected during th e sampling episode at the influe nt to the SBR. ERG samplers

then preserved the total cyanide samples with so dium hydroxide to a pH >10 S.U. and placed the

samples on ice.

After the twenty-fourth aliquots were coll ected in the two composite containers, ERG

followed “clean hands / dirty hands” sampling tec hniques to disassemble the compositors from

the sampling set up. Closed caps were placed on the two composite containers and the

composite containers were moved to the pump-off area where they remained on ice until

individual sample bottles were filled. The samplers then began setting up the compositors for the

next day of samples using new tubing sets and composite containers. The automatic compositor

was programmed to collect the same volum e on each day of sample collection.

After completing the set up for the next day of composite samples, the sampling team

transferred the wastewater coll ected in the 20-liter containe rs into the individual sample

containers at the pump-off area. For this samp ling point, ERG used a sample pump-off approach

to transfer the composite samples to the individual sample bottles. For this sample pump-off

procedure, the dissolved metals samples were collected before the total metals and classical

samples to prevent cross-contamination with in the tubing, which could lead to greater

concentrations in the dissolved metals fractions.

Samples for the dissolved and total metals analyses were pumped from one of the

previously filled 20-liter cont ainers. The pump-off station cons isted of a length of Teflon®

tubing attached to a length of silicone tubing, which was threaded throu gh an ISCO peristaltic

pump. The sampling team attached a capsule fi lter to the silicone t ubing, which was a short

distance downstream of the pump. They then attached another short length of silicone tubing to

the capsule filter effluent, which was attached to a “Y” splitter and two lengths of silicone

tubing. This set-up allowed EPA to collect “true” split samples with Dickerson’s representative.

On Day 1 only, prior to collec ting any samples of the influent to the SBR, the samplers

collected a field blank sample (SP-7) for disso lved and total metals. See Section 5.2.3 for a

description of the dissolved metals field blank sa mple collection at the in fluent to the SBR.

# 3-6 After collecting the field blank samples, the sampling team placed the end of the Teflon®

tubing into one of the 20-liter composite containers filled with wastewater from the influent to

the SBR. After the tubing and filter were purged w ith 2 liters of sample, samplers collected the

following samples using a “cleanbox,” as described in Section 3.1:

 

# Dissolved metals by 200.8;

 

# Dissolved metals by 200.7; and

 

# Dissolved hexavalent chromium.

Hexavalent chromium samples were immediat ely placed on ice after sample collection.

After the dissolved metals had been collected, the filter was removed. Once the tubing was

purged with 2 liters of sample, samplers collec ted the following samples using a “cleanbox,” as

described in Section 3.1:

 

# Total metals by 200.8; and

 

# Total metals by 200.7.

After the metal samples had been collected, the sampling team placed the end of the

Teflon® tubing into the other pr eviously filled 20-liter cont ainer. Once the tubing was purged

with 2 liters of sample, sa mplers filled containers for biochemical oxygen demand (BOD 5 

# ),

Group I, and Group II samples directly from the tubing without using a “cleanbox.” See Table 3-

6 for a list of Group I and Group II analytes. BOD 5 

# , Group I, and Group II samples were

immediately placed on ice af ter sample collection.

For all analytes, ERG collected QC samples at the influent to the S BR (SP-2) on Day 4 of

the sampling episode. In addition, for all analyt es, ERG collected a duplicate sample of the

influent from bioreactor system (SP-4) on Day 3 of the sampling episode.

3.1.3 Effluent from the SBR

The effluent from the SBR (SP-3) was colle cted downstream of the continuous backwash

gravity filters and upstream of the treated wate r storage tank. Dickerson installed a three-way

splitter on the sample tap that had three separate taps to collect samples from the sampling point.

The sample tap was located outside (see Figur e 2-2 for the sampling location for SP-3). The

sampling team set up a tent to cover the samplers/samples from rain and/or wind.

ERG collected the effluent from the SBR composite samples using two automatic

compositors which were programmed to collect individual sample volum es into two 20-liter

containers. The compositors were programmed to collect 830 mL every hour during the 24-hour

composite period. Following the composite pe riod, ERG pumped off the specific sample

volumes into the individual sample containers.

ERG used one automatic compositor to collect sample volume for the metals analyses

(excluding mercury) and another automatic compos itor to collect sample volume for all classical

analytes (i.e., BOD 5 

# , Group I, and Group II, excluding cy anide). In addition to collecting

automatic composite samples for the analytes listed above, ERG collected total and dissolved

mercury grab samples every six hours during ea ch compositing period. ERG also collected one

grab sample for cyanide during each compositing period.

# 3-7 On day 1 only, ERG collected field blank samp les (SP-8) for hexavalent chromium, total

and dissolved metals by 200.7, and total and di ssolved metals by 200.8. See Section 5.2.3 for a

description of the field blank sample collection procedures at the effluent from the SBR.

Samplers set up the compositors by attaching tw o T-splitter tubing sets to two of the taps

on the three-way splitter. The T-splitter tubing set consisted of three silicone tubes attached to a

T-splitter. The tubing configura tion was set up such that one e nd was connected to the sample

tap, one end was threaded through the automatic compositor, and connected to the large

composite container, and one end was placed next to a sump/drain near the sampling point. The

samplers attached the silicone tubing to the samp le tap, opened the valve, and allowed sample to

flow through both sets of tubing before calibrati ng either of the automatic compositors. This

ensured that the flow through the tubing during calibration would be the expected flow through

the tubing during sample collection. The automatic compositors were calibrated such that they

collected 830 mL every hour, so that the project ed complete volume would be 20 liters. After

calibration, the tubing was attached to a vented ca p on a 20 liter composite container. The sample

tap was left open during the enti re sample collection time period and flowed directly to the

sump/drain. The automatic compositor pulled sample from the flowing stream as dictated by the

sampling program and was capable of purging the lin e back to the flowing stream between each

individual sample aliquot.

Both 20-liter composite containers were placed into plastic trash cans, and maintained on

ice for the entire 24-hour compositing period. A plas tic bag was placed on top of the trash cans

to minimize contamination. Figure C-4, in Appendi x C, is a picture of the composite sampling

set-up at the effluent from the SBR.

Immediately after setting up the compositors, ERG collected the first set of the total and

dissolved mercury grab samples. At the first gr ab sample every day, ERG collected field blanks

for total mercury samples. See Section 5.2.3 for a de scription of the field blank sample collection

procedures at the effluent from the SBR.

For mercury collection, samplers shrouded one of the three taps on the three-way splitter

(the other two taps were being used by the two compositors) with a clean plastic bag by

puncturing a hole in the bottom of the bag with the end of the tap and then securing it to the tap

with a ziptie. After purging the ta p for two minutes, the samples were collected directly from the

tap into the sample bottles. Becau se total mercury and dissolved mercury samples were collected

directly from the tap, ERG was not able to collec t split samples with Dickerson’s representatives;

therefore, duplicate samples were collected. ER G collected another set of total and dissolved

mercury samples every six hours thereafter over the 24-hour period. The plastic shroud was

replaced for each set of mercury grab samples. After collecting each set of mercury grabs, ERG

filled a field test bottle and tested for pH and temperature using four-colored pH paper, a pH

meter, and a thermometer. Table 3-3 presents th e field measurement data for the effluent from

the SBR.

After the collection of the thir d set of mercury grabs, ERG collected a total cyanide grab

sample from the same tap on the three-way splitt er that was used for mercury sample collection.

Because total cyanide samples were collected directly from the ta p, ERG was not able to collect

split samples with Dickerson’s representatives; th erefore, duplicate samples were collected. The

total cyanide sample was immediately preserved. Lead acetate test strips and potassium-iodide

starch test strips were used to measure for su lfides and oxidants, respectively. No sulfides or

# 3-8 oxidants were detected during this sampling episode at the effluent from the SBR. ERG samplers

then preserved the total cyanide samples with so dium hydroxide to a pH >10 S.U. and placed the

samples on ice.

After the twenty-fourth aliquots were coll ected in the two composite containers, ERG

followed “clean hands / dirty hands” sampling tec hniques to disassemble the compositors from

the sampling set up. Closed caps were placed on the two composite containers and the

composite containers were moved to the pump-off area where they remained on ice until

individual sample bottles were filled. The samplers then began setting up the compositors for the

next day of samples using new tubing sets and composite containers. The automatic compositor

was programmed to collect the same volum e on each day of sample collection.

After completing the set up for the next day of composite samples, the sampling team

transferred the wastewater coll ected in the 20-liter containe rs into the individual sample

containers at the pump-off area. For this samp ling point, ERG used a sample pump-off approach

to transfer the composite samples to the individual sample bottles. For this sample pump-off

procedure, the dissolved metals samples were collected before the total metals and classical

samples to prevent cross-contamination with in the tubing, which could lead to greater

concentrations in the dissolved metals fractions.

Samples for the dissolved and total metals analyses were pumped from one of the

previously filled 20-liter cont ainers. The pump-off station cons isted of a length of Teflon®

tubing attached to a length of silicone tubing, which was threaded throu gh an ISCO peristaltic

pump. The sampling team attached a capsule fi lter to the silicone t ubing, which was a short

distance downstream of the pump. They then attached another short length of silicone tubing to

the capsule filter effluent, which was attached to a “Y” splitter and two lengths of silicone

tubing. This set-up allowed EPA to collect “true” split samples with Dickerson’s representatives.

On Day 1 only, prior to collec ting any samples of the effluent from the SBR, the samplers

collected a field blank sample (SP-8) for disso lved and total metals. See Section 5.2.3 for a

description of the dissolved metals field blank sa mple collection at the effluent from the SBR.

After collecting the field blank samples, the sampling team placed the end of the Teflon®

tubing into one of the 20-liter composite containers filled with wastewater from the effluent from

the SBR. After the tubing and filter were purged with 1.5-2 liters of sample, samplers collected

the following samples using a “clean box,” as described in Section 3.1:

 

# Dissolved metals by 200.8;

 

# Dissolved metals by 200.7; and

 

# Dissolved hexavalent chromium.

Hexavalent chromium samples were immedi ately placed on ice after sample collection.

After the dissolved metals had been collected, the filter was removed. Once the tubing was

purged with 2 liters of sample, samplers collec ted the following samples using a “cleanbox,” as

described in Section 3.1:

 

# Total metals by 200.8; and

 

# Total metals by 200.7.

# 3-9 After the metal samples had been collected, the sampling team placed the end of the

Teflon® tubing into the other prev iously filled 20-liter contai ner. After the tubing was purged

with 2 liters of sample, sa mplers filled containers for biochemical oxygen demand (BOD 5 

# ),

Group I, and Group II samples directly from the tubing without using a “cleanbox.” See Table 3-

6 for a list of Group I and Group II analytes. BOD 5 

# , Group I, and Group II samples were

immediately placed on ice af ter sample collection.

For all analytes, ERG collected QC samples at the effluent from the SBR (SP-3) on Day

3 of the sampling episode. In a ddition, for all analytes, ERG collected a duplicate sample of the

effluent from the SBR (SP-5) on Day 2 of the sampling episode.

3.2 List of Analytes and Sample Preservation

Samples collected at Dickerson were an alyzed for the following pollutants:

 

# Classicals:

— Biochemical oxygen demand, 5-day (BOD 5 

# ),

— Chemical oxygen demand (COD),

— Total suspended solids (TSS),

— Total dissolved solids (TDS),

— Sulfate,

— Chloride,

— Total Kjeldahl nitrogen (TKN),

— Ammonia as nitrogen,

— Nitrate/nitrite as nitrogen,

— Total phosphorus,

— Total cyanide;

 

# Total Metals:

— 

# Aluminum, antimony, arsenic, barium, beryllium, boron, cadmium,

calcium, chromium, cobalt, copper , iron, lead, magnesium, manganese,

mercury, molybdenum, nickel, selenium, silver, sodium, thallium, tin,

titanium, vanadium, and zinc.

 

# Dissolved Metals:

— 

# Same parameters as listed for total metals, plus hexavalent chromium.

The analytes selected reflect the current understanding of coal-fired power plant air

pollution control wastewaters, in cluding contributions from coal , scrubber sorb ents, treatment

chemicals, and other sources. Table 3-5 lists the analytical methods used to determine pollutant

concentrations.

Table 3-6 lists the containers used for sample collection as well as the preservation

requirements for each sample. Table 3-7 summarizes the chemical preservation for each of the

samples that were preserved on site. The sampli ng team preserved samples in accordance with

procedures described in Section 3.4 of the Sampling Plan. Immediately following sample

collection, the samplers placed the BOD 5 

# , Group I, Group II, dissolved hexavalent chromium,

and total cyanide samples on ice to cool the sa mples to <6°C. The sampling team did not place

the total and dissolved metals or the total and dissolved mercury samples on ice, which comports

# 3-10 with the requirements of Methods 200.7, 200.8, and 1631E. All dissolved metals samples, except

for mercury, were filtered in the field. The hexavalent chromium samples were preserved in the

field, but all other metals samples were acid-pre served prior to extraction at the laboratory. The

hexavalent chromium samples were preserve d with ammonium sulfate buffer solution and

ammonium hydroxide to a pH between 9.3 and 9.5 S.U. The Group II samples were preserved

with sulfuric acid to a pH of <2 S.U. in the staging area, and the pH was confirmed with fourcolor pH strips. Each total cyanide sample was te sted for sulfides and oxidants immediately after

sample collection. Because sulfides and oxidants we re not detected at any of the sampling points

during the sampling episode, the samplers did not need to dilute the samples or add sodium

arsenite to the samples. After testing for sulf ides and oxidants, the total cyanide samples were

preserved with sodium hydroxide to a pH >10 S.U. and placed on ice.

3.3 Plant Operational Data

During the EPA sampling episode, Dickerson plant personnel provided the sampling

team with operational data for each of the gene rating units and the FGD scrubber system, as well

as operational and flow data for the FGD wastew ater treatment system. Table 3-8 presents the

unit operating characteristics, Table 3-9 presents the FGD scrubber system operating

characteristics, Table 3-10 presents informati on on the coal burned during the sampling episode,

Table 3-11 presents information on the FGD sc rubber slurry generation during the sampling

episode, and Table 3-12 presents th e FGD wastewater treatment syst em operating characteristics.

3.4 Deviations from the Sampling and Analysis Plan

The sampling episode proceeded as specified in the Sampling Plan with the exceptions

described below:

 

# Plant Shutdown . Between 0134 and 0326 on Tuesday morning, which is prior to

the end of the day 1 24-hour sample co mpositing period, Dickerson shut down all

three generating units due to lack of elec tricity demand. The station continued to

operate the FGD wastewater treatment sy stem at reduced flow rates and EPA

continued to collect samples as planne d through the end of the sampling episode.

Additionally, the FGD system was shut down, but the plant occasionally blew

down from the scrubber and operated the dewatering equipment to allow EPA to

collect the influent samples. The samp ling team monitored flow rates during the

remainder of the sampling episode. The generating station and FGD scrubber did

not resume operation until after the end of the sampling episode.

 

# Clarifier Bed Turnover. In the afternoon of day 3 of the sampling episode, the

clarifier sludge bed overturned. The condition was identified by turbidity

measurements and wastewater treatment operators added polymer to counteract

the situation. At 1630 on August 25, the wast ewater treatment operator stated that

turbidity levels were still elevated, a lthough the polymer addition had reduced the

turbidity. The operator said that SP-2 day 1 and 2 samples should be unaffected,

but day 3 and 4 samples would be affected.

 

# Preservation of hexavalent chromium: ERG planned to preserve the hexavalent

chromium samples to a pH between 9.3 and 9.7 S.U. using an ammonium sulfate

buffer solution; however, since the amm onium sulfate buffer solution was not

# 3-11 achieving the desired pH, the samplers added only 100 drops of ammonium

sulfate buffer solution, followed by as mu ch ammonium hydroxide as necessary

to reach the desired pH.

 

# Total mercury grab sample at SP-1 (Day 3): On day 3 of sample collection at

the influent to FGD wastewater treatm ent system (SP-1), the sampling team

dropped the total mercury volume 2 grab sample bottle inside the clean box. A

portion of the contents spilled into the clean box. Since th e majority of the sample

volume remained in the sample bottl e, additional sample volume was not

collected.

 

# Total mercury field blank at SP-2 (Day 2): On day 2 of sample collection at the

influent to the SBR (SP-2), the total mercury field blank volume 1 bottle was

taken out from under the plastic bag shr ouding the sampling tap prior to closing

the inner bag; however, the li d to the bottle was closed prior to the bottle leaving

the plastic bag shroud.

 

# Classicals compositor set up at SP-3 (Day 1): On day 1 of sample collection at

the effluent to the SBR (SP-3), the valve for the classical compositor was

inadvertently adjusted while collecting to tal mercury grab 1. The sampling team

readjusted the valve to its approximate position. The sampling team noted that

the classicals compositor collected 20 liters of sample during the day.

 

# Total cyanide QC sample at SP-3 (Day 3): On day 3 of sample collection at the

effluent to the SBR (SP-3), the sampling t eam collected the field test jar volume

prior to collecting the total cyanide QC sample. The “clean hands” sampler

changed her gloves prior to collect ing the total cyanide QC sample.

 

# Analytical method for zinc analyses: ERG had planned to analyze zinc using

EPA Method 200.8 with collision cell; how ever, after discussions with the

laboratory, EPA decided to analyz ed zinc using EPA Method 200.7.

# 3-12 Table 3-1. Sample Collection Information, Dickerson

Sampling

Point

Number Sampling Point Description Type of

Sample Sample

Collection Date Sample Collection

Time

SP-1 Influent to FGD Wastewater Treatment

System – Day 1 Grab 08/23/10 1012 a 

# and 1146 b



# Influent to FGD Wa stewater Treatment

System – Day 2 Grab 08/24/10 1126 a 

# and 1305 b



# Influent to FGD Wa stewater Treatment

System – Day 3 Grab 08/25/10 1135 a 

# and 1311 b



# Influent to FGD Wa stewater Treatment

System – Day 4 Grab 08/26/10 1111 a 

# and 1300 b



# SP-2 Influent to the SBR – Day 1 Composite 08/23/10

08/24/10 0901 c



# 1039 d



# Grab 08/23/10

08/24/10 0913 e 

# , 1514 f 

# , and 2113 g



# 0314 h



# Influent to the SBR – Day 2 Composite 08/24/10

08/25/10 0900 c



# 1031 d



# Grab 08/24/10

08/25/10 0911 e 

# , 1518 f 

# , and 2113 g



# 0312 h



# Influent to the SBR – Day 3 Composite 08/25/10

08/26/10 0900 c



# 1014 d



# Grab 08/25/10

08/26/10 0912 e 

# , 1517 f 

# , and 2114 g



# 0314 h



# Influent to the SBR – Day 4 Composite 08/26/10

08/27/10 0900 c



# 0825 d



# Grab 08/26/10

08/27/10 0911 e 

# , 1516 f 

# , and 2107 g



# 0310 h



# SP-3 Effluent from the SBR – Day 1 Composite 08/23/10

08/24/10 0731 c



# 0955 d



# Grab 08/23/10

08/24/10 0745 e 

# , 1345 f 

# , and 1946 g



# 0152 h



# Effluent from the SBR – Day 2 Composite 08/24/10

08/25/10 0730 c



# 0945 d



# Grab 08/24/10

08/25/10 0743 e 

# , 1346 f 

# , and 1948 g



# 0145 h



# Effluent from the SBR – Day 3 Composite 08/25/10

08/26/10 0730 c



# 0939 d



# Grab 08/25/10

08/26/10 0744 e 

# , 1345 f 

# , and 1944 g



# 0143 h



# Effluent from the SBR – Day 4 Composite 08/26/10

08/27/10 0731 c



# 0657 d



# Grab 08/26/10

08/27/10 0743 e 

# , 1345 f 

# , and 1942 g



# 0142 h

# 3-13 Table 3-1. Sample Collection Information, Dickerson

Sampling

Point

Number Sampling Point Description Type of

Sample Sample

Collection Date Sample Collection

Time

SP-4 Duplicate of Influent to the SBR – Day 3 Composite 08/25/10

08/26/10 0900 c



# 1014 d



# Grab 08/25/10

08/26/10 0914 e 

# , 1518 f 

# , and 2116 g



# 0315 h



# SP-5 Duplicate of Effluent from the SBR –

Day 2 Composite 08/24/10

08/25/10 0730 c



# 0945 d



# Grab 08/24/10

08/25/10 0745 e 

# , 1348 f 

# , and 1950 g



# 0146 h



# SP-6 Influent to FGD Wastewater Treatment

System Field Blank Grab 08/23/10 0958 i 

# and 1139 j



# SP-7 Influent to the SBR Field Blank – Day 1 Composite 08/23/10

08/24/10 0823 k



# 1028 l



# Grab 08/23/10 0906 m



# Influent to the SBR Field Blank – Day 2 Grab 08/24/10 0907 m



# Influent to the SBR Field Blank – Day 3 Grab 08/25/10 0907 m



# Influent to the SBR Field Blank – Day 4 Grab 08/26/10 0906 m



# SP-8 Effluent from the SBR Field Blank –

Day 1 Composite 08/23/10

08/24/10 0650 k



# 0942 l



# Grab 08/23/10 0741 m



# Effluent from the SBR Field Blank –

Day 2 Grab 08/24/10 0739 m



# Effluent from the SBR Field Blank –

Day 3 Grab 08/25/10 0739 m



# Effluent from the SBR Field Blank –

Day 4 Grab 08/26/10 0738 m

a 

# Start time for the collection of the total metals samples (total metals by 200.7, total metals by 200.8, total mercury,

and dissolved mercury) and classicals (BOD 5 

# , Group I, Group II, and total cyanide).

b 

# Start time for the collection of the dissolved metals samples (dissolved metals by 200.7, dissolved metals by 200.8,

and dissolved hexavalent chromium). Does not include dissolved mercury.

c 

# Started compositor.

d 

# Start time for the collection of dissolved metals samples (dissolved metals by 200.7, dissolved metals by 200.8,

and dissolved hexavalent chromium), total metals samples (total metals by 200.7 and total metals by 200.8), and

classicals (BOD 5 

# , Group I, and Group II).

e 

# Start time for the collection of the total and dissolved mercury Grab 1 samples.

f 

# Start time for the collection of the total and dissolved mercury Grab 2 samples.

g 

# Start time for the collection of the total and dissolved mercury Grab 3 and total cyanide samples.

h 

# Start time for the collection of the total and dissolved mercury Grab 4 samples.

i 

# Start time for the collection of total and dissolved mercury and total metals by 200.7 and total metals by 200.8 field

blank samples.

j 

# Start time for the collection of dissolved metals by 200.7 and dissolved metals by 200.8, and hexavalent chromium

field blank samples.

k 

# Filled 20L field blank carboy

l 

# Start time for the collection of total metals by 200.7 and total metals by 200.8 field blank samples and collection of

dissolved hexavalent chromium, dissolved metals by 200.7, and dissolved metals by 200.8 field blank samples.

m



# Start time for the collection of total mercury field blank samples.

# 3-14Table 3-2. Sample Collection at Dickerson Steam StationSampling PointNumberSampling Point Name Total Metals (EPA Method 200.8 with collision cell) Total Metals (EPA Method 200.7) Dissolved Metals (EPA Method 200.8 with collision cell,) Dissolved Metals (EPA Method 200.7) Total Mercury Dissolved Mercury Hexavalent Chromium BOD 5 Group I

a Group II

b Total CyanideSP-1 Influent to FGD Wastewater TreatmentSystem4 4 4 4 4 4 4 4 4 4 4SP-2 Influent to the SBR 4+1QC 4+1QC 4+1QC4+1QC 4+1QC 4+1QC 4+1QC 4+1QC 4+1QC 4+1QC4+1QCSP-3 Effluent from the SBR4+1QC 4+1QC 4+1QC 4+1QC 4+1QC 4+1QC 4+1QC 4+1QC 4+1QC 4+1QC4+1QCSP-4 Duplicate of Influent to the SBR 1 1 1 1 1 1 1 1 1 1 1SP-5 Duplicate of Effluent from the SBR 1 1 1 1 1 1 1 1 1 11SP-6 Field Blank for Influent to FGD WastewaterTreatment System1 1 1 1 1 1SP-7 Field Blank for Influent to the SBR 1 1 1 1 4 1SP-8 Field Blank for Effluent from the SBR 1 1 1 1 4 1Total Number of Samples 17+2QC17+2QC 17+2QC 17+2QC 23+2QC 14+2QC 17+2QC 14+2QC 14+2QC 14+2QC 14+2QC

# 3-15Table 3-3. Field Measurements, DickersonSamplingPointNumberSampling PointDescriptionDateTimeTemperature (°C)pHWasteStream FlowRate (GPM)NotesThermometerProbeMeteraStripsSP-1 Influent to FGDWastewater TreatmentSystem – Day 18/23/10102444396.617 82.1bNo detected sulfides or oxidants in total cyanidegrab.Influent to FGDWastewater TreatmentSystem – Day 28/24/10 1138333077.5 66.5bNo detected sulfides or oxidants in total cyanidegrab.Influent to FGDWastewater TreatmentSystem – Day 38/25/10 11493129.27.187 49.6bSamples collected were black. No detectedsulfides or oxidants in total cyanide grab.Influent to FGDWastewater TreatmentSystem – Day 48/26/10 11233330.17.017 60.2bNo detected sulfides or oxidants in total cyanidegrab.SP-2 Influent to SBR – Day 18/23/10 09153836.17.037.5 112.1No detected sulfides or oxidants in total cyanidegrab.8/23/10 15183934.97.137 111.88/23/10 21203835.67.127 109.48/24/10 03203633.97.097 99.9Influent to the SBR –Day 28/24/10 091436336.987 96.6 No detected sulfides or oxidants in total cyanidegrab.8/24/10 15203632.56.927 96.08/24/10 21183431.36.956.5 87.18/25/10 03203229.36.926.5 81.6Influent to the SBR –Day 38/25/10 09173128.56.97 81.1 Clarifier bed overturned and condition was notedby turbidity measurements. Samples collectedwere grey and Grab 3 had cooler temperaturesfrom previous sampling days. No detectedsulfides or oxidants in total cyanide grab.8/25/10 15213128.56.97 83.98/25/10 21323128.76.876.5 78.68/26/10 03193028.76.887.0 78.5

# 3-16Table 3-3. Field Measurements, DickersonSamplingPointNumberSampling PointDescriptionDateTimeTemperature (°C)pHWasteStream FlowRate (GPM)NotesThermometerProbeMeteraStripsSP-2 Influent to the SBR –Day 48/26/10 091330.5296.847 77.8 The samples collected were mediumgrey/brownish. No detected sulfides or oxidantsin total cyanide grab.8/26/10 15183230.36.637 83.48/26/10 21133028.76.706.5 84.48/27/10 03203027.66.776.5 79.2SP-3 Effluent from the SBR –Day 18/23/10 074831297.127 97.3The samples collected were clear. No detectedsulfides or oxidants in total cyanide grab.8/23/10 13493229.47.067 95.38/23/10 19503129.57.077 95.38/24/10 015831297.117 88.3Effluent from the SBR –Day 28/24/10 074830.527.97.017 86.3The samples collected were clear. No detectedsulfides or oxidants in total cyanide grab.8/24/10 13513028.57.047.5 88.18/24/10 20053028.37.017 88.18/25/10 01543027.37.077.5 86.7Effluent from the SBR –Day 38/25/10 07463027.87.017 86.3No detected sulfides or oxidants in total cyanidegrab.8/25/10 13473028.37.017 66.68/25/10 194930.529.36.937.5 66.68/26/10 01483027.96.957.5 66.6Effluent from the SBR –Day 48/26/10 07453027.56.917.5 66.8Water color was light yellow/almost clear. Nodetected sulfides or oxidants in total cyanidegrab.8/26/10 13483129.36.927.5 67.88/26/10 19493129.96.957 61.78/27/10 01493026.86.946.5 61.7aThe pH meter was calibrated prior to the sampling episode and once every day during the sampling episode using prepackaged buffer solutions at pH 4.0, 7.0,and 10.0.bBased on average flow rate, in gpm, for the entire day of sampling. The flow rate does not represent the flow rate at the time of sample collection.Sample NumberSample PointSample Description71841 SP-1, Day 1 Influent to FGD Wastewater Treatment System - Day 171842 SP-1, Day 2 Influent to FGD Wastewater Treatment System - Day 271843 SP-1, Day 3 Influent to FGD Wastewater Treatment System - Day 371844 SP-1, Day 4 Influent to FGD Wastewater Treatment System - Day 471845 SP-2, Day 1 Influent to SBR System - Day 171846 SP-2, Day 2 Influent to SBR System - Day 271847 SP-2, Day 3 Influent to SBR System - Day 371848 SP-2, Day 4 Influent to SBR System - Day 471849 SP-3, Day 1 Effluent from SBR System - Day 171850 SP-3, Day 2 Effluent from SBR System - Day 271851 SP-3, Day 3 Effluent from SBR System - Day 371852 SP-3, Day 4 Effluent from SBR System - Day 471853 SP-4, Day 3 Duplicate of Influent to SBR System - Day 371854 SP-5, Day 2 Duplicate of Effluent from SBR System - Day 271855 SP-6, Day 1 Influent to FGD Wastewater Treatment System Field Blank - Day 171856 SP-7, Day 1 Influent to SBR System Field Blank - Day 171857 SP-7, Day 2 Influent to SBR System Field Blank - Day 271858 SP-7, Day 3 Influent to SBR System Field Blank - Day 371859 SP-7, Day 4 Influent to SBR System Field Blank - Day 471860 SP-8, Day 1 Effluent from SBR System Field Blank - Day 171861 SP-8, Day 2 Effluent from SBR System Field Blank - Day 271862 SP-8, Day 3 Effluent from SBR System Field Blank - Day 371863 SP-8, Day 4 Effluent from SBR System Field Blank - Day 4Table3-5.AnalyticalMethods,DickersonParameterMethod NumberClassicalsBiochemical oxygen demand (BOD5) SM 5210 BChemical oxygen demand (COD) EPA 410.4Total suspended solids (TSS) SM 2540 DTotal dissolved solids (TDS) SM 2540 CSulfate EPA 300.0Chloride EPA 300.0Ammonia as nitrogen EPA 350.1Nitrate/nitrate asnitrogen EPA 353.2Total Kjeldahl nitrogen (TKN) EPA 351.2Total phosphorus EPA 365.1Total cyanide SM 4500 CN ETotal and Dissolved MetalsMercury EPA 1631EHexavalent chromium (dissolved only) EPA 218.6Antimony, arsenic, cadmium, chromium, copper, lead, nickel, selenium,silver, thallium, and vanadiumEPA 200.8 with collision cellAluminum, barium, beryllium, boron, calcium, cobalt, iron, magnesium,manganese, molybdenum, sodium, tin, titanium, and zincEPA 200.7Table 3-6. Summaryof Sample Container and Planned Preservation, DickersonParameterSampleContainer andVolumeQC SampleContainer andVolumeOn-Site PreservationClassicalsBOD5One 1-L plasticbottleOne 1-L plasticbottle≤6CGroup IaOne 1-L plasticbottlesOne 1-L plasticbottles≤6CGroup IIbTwo 1-L plasticbottlesTwo 1-L plasticbottlesH2SO4to pH <2 S.U.,≤6CTotal cyanide One 1-L plasticbottleOne 1-L plasticbottlesDilution until sulfide is not detected,NaAsO2until total chlorine is notpresent, NaOH to pH >10 S.U.,≤6CMetalsTotal metals (EPA Method 200.8 withcollision cell)One 500-mLplastic bottleNo additionalvolume neededNone(acid preserve at laboratory)Total metals (EPA Method 200.7) One 500-mLplastic bottleNo additionalvolume neededNone(acid preserve at laboratory)Dissolved metals (EPA Method 200.8with collision cell)One 500-mLplastic bottleNo additionalvolume needed0.45-μm filter (performed in field)(acid preserve at laboratory)Dissolved metals (EPA Method 200.7) One 500-mLplastic bottleNo additionalvolume needed0.45-μm filter (performed in field)(acid preserve at laboratory)Total mercury: None(acid preserve at laboratory)Manual composite grab samples Four 125-mLglass bottleNo additionalvolume neededInfluent samples and field blanksamplesTwo 250-mLglass bottleNo additionalvolume neededDissolved mercury: None(filter and acid preserve atlaboratory)Manual composite grab samples Four 125-mLglass bottleNo additionalvolume neededInfluent samples One 250-mLglass bottleNo additionalvolume neededHexavalent chromium One 250-mLplastic bottleNo additionalvolume needed0.45-μm filter (performed in field)Ammonium sulfate buffer topH 9.3 – 9.7 S.U.,≤6C(a) Group I includes TSS, TDS, sulfate, and chloride.(b) Group II includes ammonia as nitrogen, COD, nitrate/nitrite as nitrogen, TKN, and total phosphorus.Sampling PointNumberAnalysisDateChemicalAddedInitial pHFinal pHAmountAdded(drops)71841 Group II Volume 1 8/23/10H2SO47 2 10071841 Group II Volume 2 8/23/10H2SO47 2 10071841Hexavalent Chromium8/23/10(NH4)2SO4Buffer7 7.9 100NH4OH 7.9 9.5 5471855 Hexavalent Chromium –Field Blank8/23/10(NH4)2SO4Buffer5.5 8.5 100NH4OH 8.5 9.5 2971841 Total Cyanide 8/23/10 NaOH 7 10 3071845 Total Cyanide 8/23/10 NaOH 7 10 1571849 Total Cyanide 8/23/10 NaOH 7 10 2071842 Group II Volume 1 8/24/10H2SO47 2 10071842 Group II Volume 2 8/24/10H2SO47 2 10071845 Group II Volume 1 8/24/10H2SO47 1.5 10071845 Group II Volume 2 8/24/10H2SO47 1.5 10071849 Group II Volume 1 8/24/10H2SO47 1 10071849 Group II Volume 2 8/24/10H2SO47 1 10071842 Hexavalent Chromium 8/24/10(NH4)2SO4Buffer7 8.1 100NH4OH 8.1 9.5 5571845 Hexavalent Chromium 8/24/10(NH4)2SO4Buffer7.5 8.3 100NH4OH 8.3 9.5 3071849Hexavalent Chromium8/24/10(NH4)2SO4Buffer7.5 8.3 100NH4OH 8.3 9.5 2371856 Hexavalent Chromium –Field Blank8/24/10(NH4)2SO4Buffer6.5 8.5 100NH4OH 8.5 9.5 4071860Hexavalent Chromium –Field Blank8/24/10(NH4)2SO4Buffer6 8.5 100NH4OH 8.5 9.5 4071842 Total Cyanide 8/24/10NaOH 7 >10 12571846 Total Cyanide 8/24/10NaOH 7 >10 2071850 Total Cyanide 8/24/10NaOH 7 >10 2071854 Total Cyanide 8/24/10NaOH 7 >10 2071843Group II Volume 1 8/25/10H2SO47 2 10071843 Group II Volume 2 8/25/10H2SO47 2 10071846 GroupII Volume 1 8/25/10H2SO47 2 100Sampling PointNumberAnalysisDateChemicalAddedInitial pHFinal pHAmountAdded(drops)71846 Group II Volume 2 8/25/10H2SO47 2 10071850 Group II Volume 1 8/25/10H2SO47 2 10071850 Group II Volume 2 8/25/10H2SO47 2 10071854 Group II Volume 1 8/25/10H2SO47 2 10071854 Group II Volume 2 8/25/10H2SO47 2 10071843Hexavalent Chromium8/25/10(NH4)2SO4Buffer7 8.5 100NH4OH 8.5 9.5 3571846 Hexavalent Chromium 8/25/10(NH4)2SO4Buffer7 8.1 100NH4OH 8.1 9.5 3571850 Hexavalent Chromium 8/25/10(NH4)2SO4Buffer7 8.1 100NH4OH 8.1 9.5 4071854 Hexavalent Chromium 8/25/10(NH4)2SO4Buffer7 8.1 100NH4OH 8.1 9.5 3571843 Total Cyanide 8/25/10NaOH 7 10 15071847 Total Cyanide 8/25/10NaOH 6.5 10 2071851 Total Cyanide 8/25/10NaOH 7.5 10 2071851 Total Cyanide - QC 8/25/10NaOH 7.5 10 2071853 Total Cyanide 8/25/10NaOH 6.5 10 2071844 Group II Volume 1 8/26/10H2SO47 2 10071844 Group II Volume 2 8/26/10H2SO47 2 10071847 Group II Volume 1 8/26/10H2SO47 1 10071847 Group II Volume 2 8/26/10H2SO47 1 10071851 Group II Volume 1 8/26/10H2SO47 2 10071851 Group II Volume 2 8/26/10H2SO47 2 10071851 Group II Volume 1 - QC 8/26/10H2SO47 2 10071851 Group II Volume 2 - QC 8/26/10H2SO47 2 10071853 Group II Volume 1 8/26/10H2SO47 1 10071853 Group II Volume 2 8/26/10H2SO47 1 10071844Hexavalent Chromium8/26/10(NH4)2SO4Buffer7 8.1 100NH4OH 8.1 9.5 4571847 Hexavalent Chromium 8/26/10(NH4)2SO4Buffer7 8.3 100NH4OH 8.3 9.5 32Sampling PointNumberAnalysisDateChemicalAddedInitial pHFinal pHAmountAdded(drops)71851 Hexavalent Chromium 8/26/10(NH4)2SO4Buffer7 8.3 100NH4OH 8.3 9.5 2071853 Hexavalent Chromium 8/26/10(NH4)2SO4Buffer7 8.3 100NH4OH 8.3 9.5 3071844 Total Cyanide 8/26/10NaOH 7 10 20071848 Total Cyanide 8/26/10NaOH 6.5 >10 2071848 Total Cyanide - QC 8/26/10NaOH 6.5 >10 2071852 Total Cyanide 8/26/10NaOH 7.5 >10 2071848 Group II Volume 1 8/27/10H2SO47 2 10071848 Group II Volume 2 8/27/10H2SO47 2 12071848 Group II Volume 1 - QC 8/27/10H2SO47 2 10071848 Group II Volume 2 - QC 8/27/10H2SO47 2 10071852 Group II Volume 1 8/27/10H2SO47 2 10071852 Group II Volume 2 8/27/10H2SO47 2 10071848Hexavalent Chromium8/27/10(NH4)2SO4Buffer7 8.3 100NH4OH 8.3 9.5 2571852 Hexavalent Chromium 8/27/10(NH4)2SO4Buffer7 8.3 100NH4OH 8.3 9.5 22Table3-8.GeneratingUnitOperatingCharacteristicsduringSampleCollection,DickersonUnit IDBoiler TypeCapacity(MW)Electricity Production(MW)(or Percent Capacity %)aSCR(No, On, Off)Particulate Control System(HS/CS ESP, or BH)1 Coal 191 20% Off ESP/BH2 Coal 191 20% Off ESP/BH3 Coal 191 20% Off ESP/BHaThe percent capacity was measured on a daily basis from midnight on August 24 to midnight on August 27.ESP/BH– Electrostatic precipitator and baghouse.

# 3-24Table 3-9. FGD Scrubber System Operating Characteristics, DickersonUnit IDWet FGDSystem (Yes/No)Type ofScrubberForcedOxidation(Yes/No)SorbentAdditives (DBA,formic acid, etc.)FGD Make-upWater SourceSO2RemovalPercentageType of SolidsSeparation1, 2, 3 Yes Tray Yes Limestone NoneIndustrial WWTP– River water96.21% Vacuum FilterNote: One FGD system services all three generating units.g gp ,Day ofSamplingUnit IDCoal TypeAmount of CoalUsed During Dayof Sampling(tpd)Source of Coal(Coal Regionand/or State)PercentSulfur inCoal(%)Chlorine Content ofCoal(?)11Fed 2/BrooksRun900aPAWV5.11.70.70.122Fed 2/BrooksRun825PAWV5.11.70.70.123Fed 2/BrooksRun704PAWV5.11.70.70.1221 Fed 2/Storage 655PAWV4.91.70.70.122 Fed 2 833 PA 4.9 0.73 Fed 2 715 PA 4.9 0.731 NAbNAbNAbNAbNAb2 NAbNAbNAbNAbNAb3 NAbNAbNAbNAbNAb41 NAbNAbNAbNAbNAb2 NAbNAbNAbNAbNAb3 NAbNAbNAbNAbNAbaEstimated value.bAll three generating units were shut down on days 3 and 4 due to low electricity demand.[QUESTION FOR DICKERSON: What is Fed 2? Please alsospecify the units associatedwith the chlorine contentof the coal.]Table 3-11. Scrubber Slurry Informationduring Sample Collection, DickersonDay ofSamplingFGDSystem IDAssociatedUnit IDsScrubber SlurryBlowdown Flow RateScrubberSlurryPercentSolidsTime ofDewateringDuringSampling DayPercentFiltrateRecycledBack toScrubberFlow Rate(gpm)Duration1 1 1, 2, 3 896 10.3 hrs 19-21% NP 85%2 1 1, 2, 3 696 2 hrs 19-21% NP 85%3 1 1, 2, 3 880 2.3 hrs 18.9-19.2% NP 85%4 1 1, 2, 3 884 2.6 hrs 18.9-19.0% NP 85%NP – Data not provided by the plant. [QUESTION FORDICKERSON: Please provide the dewatering time for thescrubber system for each dayof sampling, if available.]

# 3-26Table 3-12. FGD Wastewater Treatment System Operation Information, DickersonDay of SamplingScrubber PurgeFlow Rate(gpd)Chemical UsageLime(tons/day)Ferric Chloride(liters/day)Organosulfide(liters/day)aPolymer(liters/day)Hydrochloric Acid(liters/day)1 118,2177.3(8.70 S.U.)115(47 ppm)NA19.5(20 ppm)820(6.9 S.U.)2 95,77515.5(8.70 S.U.)110(47 ppm)NA19.3(20 ppm)670(6.9 S.U.)3 71,39415.1(8.70 S.U.)108(47 ppm)NA18(20 ppm)360(6.9 S.U.)4 86,68915.1(8.70 S.U.)107(47 ppm)NA17.5(20 ppm)220(6.9 S.U.)aDickerson was not adding organosulfide to the wastewater treatment system during the sampling episode.Note: Values in parentheses are the set points for the system.This section summarizes the laboratory resultsof analyses of samples for the influent tothe FGD wastewater treatment system and the influent to and effluent from the SBR system.Appendix A provides all analytical resultsfor all samples collected at Dickerson,including all qualified results and all results that were measured above the method detectionlimit, but below the quantitation limit (i.e., J-values).Table 4-1 presents the analytical results forall classical and metal analytes for the fourdays of sampling at the influent to the FGD wastewater treatment system(SP-1), as well as thecalculated 4-day average result for each analyte for the sampling point. Tables 4-2 and 4-3present the analytical results forall classical and metal analytes for the four days of sampling atthe influent to the SBR (SP-2) and the effluent from the SBR (SP-3), respectively.Tables 4-1 through 4-3 include the analyticalresults for all analytes for which EPAconducted analyses. Results are rounded to three significant digits.If an analyte was notdetected in a sample above the method detection limit, the result is reported as “ND” followed bythe sample-specific quantitation limit in parentheses. If an analyte was measured above themethod detection limit, but below the quantitationlimit, the result is reported as “NQ” followedby the sample-specific quantitation limit in parentheses.For Table 4-2 (Influent to the SBR), a duplicate sample was collected on Day 3 of thesampling episode. The Day 3 results presented inTable 4-2 represent the average of the originaland the duplicate sample results. Table 5-2 presents the analytical results for the original andduplicate results and the calculated relative percent difference (RPD).For Table 4-3 (Effluentfrom the SBR), a duplicate sample was collectedon Day 2 of the sampling episode. The Day 2results presented in Table 4-3 represent the average of the original and the duplicate sampleresults. Table 5-3 presents the analytical results for the original andduplicate results and thecalculated RPD.When calculating the average concentrationsfor the duplicate samples or for the 4-dayaverages, ERG used the following methodology:If all results were above the quantitation limit, then all results were averagedtogether;If at least one result was above the quantitation limit, then 1⁄2 the quantitation limitwas used in the average calculation forall results that were less than thequantitation limit and the result is reported with a less than sign (“<”);If all results were below the quantitationlimit, but at least one result was abovethe method detection limit (i.e., J-value),then the sample-specific quantitationlimits for all results were averaged andthe result is reported as “NQ” followed bythe average of the sample-specific quantitation limits; andIf all results were below the method detection limit, then the sample-specificquantitation limits for all results were averaged and the result isreported as “ND”followed by the average of the sample-specific quantitation limits.theFGDwastewatertreatmentsystem(SP-1),theinfluenttotheSBR(SP-2), andthe effluentfrom the SBR (SP-3). Table 4-5 presents the4-day average results for all metal analytes,including total and dissolved analyses, for the influent to the FGD wastewater treatment system(SP-1), the influent to the SBR (SP-2), and the effluent from the SBR (SP-3). The resultspresented in this report are not paired results,meaning that the sample collection across thetreatment system was not timed to reflect theamount of time it takes the wastewater to passthrough the system.Appendix Tables A-1 through A-14 present all theanalytical results from the influent tothe FGD wastewater treatment system (SP-1), theinfluent to the SBR (SP-2), the effluent fromthe SBR (SP-3), the duplicate of the influent to the SBR (SP-4), and the duplicate of the effluentfrom the SBR (SP-5) sample analyses, including J-values.

# 4-3< - Average result includes at least one value measured belowthe quantitation limit. (Calculation uses 1⁄2 the quantitation limit for values below the quantitation limit).ND – Not detected (number in parentheses is the quantitation limit).NQ – Analyte was measured above the method detection limit, butbelow the quantitation limit (number shown in parentheses is the quantitation limit). The analytical result ispresented in Appendix A with a J flag designation. A “NQ” for the 4-day average result indicates that all results were below the quantitation limit, but at least one result is a Jvalue.^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.** - The accuracy of the Day 1 total dissolved solid result seems questionable based on the results from the other sampling days. If the Day 1 total dissolved solid result wasexcluded from the calculated average, the 4-day average would be 12,700 mg/L.B – Analyte was found in the blank and sample.C – pH upon receipt was less than 10 S.U.D – Laboratory duplicate RPD greater than method-specified criteria.L – LFB or LCS percent recovery not within method-specified criteria, but iswithin laboratory-specified criteria.Table 4-1. Influent to FGD Wastewater Treatment System, DickersonAnalyteUnitsMethodInfluent to FGD Wastewater Treatment System (SP-1)Day 1Day 2Day 3Day 44-DayAverageClassicalsAmmonia mg/L 350.1 5.90 5.40 4.00 4.90 5.05Nitrate Nitrite as N mg/L 353.2 67.0 67.0 47.0 62.0 60.8Nitrogen, Total Kjeldahl mg/L 351.2 130 L 23.0 B 12.0 B 21.0 B 46.5Biochemical Oxygen Demand mg/L 5210B NQ (2.50) 3.70 6.30 8.00 < 4.81Chemical Oxygen Demand mg/L 410.4 110 150 110 150 130Chloride mg/L 300.0 9,200 8,400 5,700 7,400 7,680Sulfate mg/L 300.0 1,800 1,800 1,700 1,800 1,780Cyanide, Total mg/L 4500 CN E 1.20 C 1.10 B 0.740 0.760 B 0.950Total Dissolved Solids mg/L 2540C 170,000** B 15,000 12,000 11,000 D 52,000**Total Suspended Solids mg/L 2540D 3,900 11,000 3,900 3,700 5,630Phosphorus, Total mg/L 365.1 3.70 NQ (0.0500) 3.20 4.30 < 2.81Total MetalsAluminum ug/L 200.7 130,000 110,000 91,000 110,000 110,000Antimony ug/L 200.8 23.0 18.0 15.0 19.0 18.8Arsenic ug/L 200.8 280 220 190 230 230Barium ug/L 200.7 700 720 590 790 700Beryllium ug/L 200.7 15.0 12.0 10.0 13.0 12.5Boron ug/L 200.7 220,000 B 200,000 B 150,000 B 200,000 B 193,000Cadmium ug/L 200.8 31.0 27.0 21.0 27.0 26.5Calcium ug/L 200.7 2,900,000 2,700,000 2,600,000 2,600,000 2,700,000Chromium ug/L 200.8 690 ^ 570 ^ 450 ^ 570 ^ 570Cobalt ug/L 200.7 130 120 99.0 120 117Copper ug/L 200.8 660 530 440 540 543Iron ug/L 200.7 180,000 160,000 130,000 160,000 158,000

# 4-4< - Average result includes at least one value measured belowthe quantitation limit. (Calculation uses 1⁄2 the quantitation limit for values below the quantitation limit).ND – Not detected (number in parentheses is the quantitation limit).NQ – Analyte was measured above the method detection limit, butbelow the quantitation limit (number shown in parentheses is the quantitation limit). The analytical result ispresented in Appendix A with a J flag designation. A “NQ” for the 4-day average result indicates that all results were below the quantitation limit, but at least one result is a Jvalue.^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.** - The accuracy of the Day 1 total dissolved solid result seems questionable based on the results from the other sampling days. If the Day 1 total dissolved solid result wasexcluded from the calculated average, the 4-day average would be 12,700 mg/L.B – Analyte was found in the blank and sample.C – pH upon receipt was less than 10 S.U.D – Laboratory duplicate RPD greater than method-specified criteria.L – LFB or LCS percent recovery not within method-specified criteria, but iswithin laboratory-specified criteria.Table 4-1. Influent to FGD Wastewater Treatment System, DickersonAnalyteUnitsMethodInfluent to FGD Wastewater Treatment System (SP-1)Day 1Day 2Day 3Day 44-DayAverageLead ug/L 200.8 220 170 140 180 178Magnesium ug/L 200.7 1,700,000 1,600,000 1,200,000 1,600,000 1,530,000Manganese ug/L 200.7 11,000 9,800 7,800 9,900 9,630Mercury ng/L 1631E 8,550 4,830 4,030 5,630 5,760Molybdenum ug/L 200.7 520 440 360 440 440Nickel ug/L 200.8 660 580 450 570 565Selenium ug/L 200.8 1,500 1,200 920 1,200 1,210Silver ug/L 200.8 ND (2.00) ND (2.00) ND (2.00) ND (2.00) ND (2.00)Sodium ug/L 200.7 200,000 190,000 160,000 190,000 185,000Thallium ug/L 200.8 NQ (2.00) NQ (2.00) 2.90 NQ (2.00) < 1.48Tin ug/L 200.7 NQ (200) NQ (200) NQ (200) NQ (200) NQ (200)Titanium ug/L 200.7 6,200 5,400 4,500 5,600 5,430Vanadium ug/L 200.8 580 470 390 490 483Zinc ug/L 200.7 2,500 2,000 1,500 2,000 2,000Dissolved MetalsAluminum ug/L 200.7 NQ (200) NQ (200) NQ (200) NQ (200) NQ (200)Antimony ug/L 200.8 3.70 3.80 2.80 3.50 3.45Arsenic ug/L 200.8 NQ (4.00) NQ (4.00) NQ (4.00) NQ (4.00) NQ (4.00)Barium ug/L 200.7 250 210 130 140 183Beryllium ug/L 200.7 ND (2.00) ND (2.00) ND (2.00) ND (2.00) ND (2.00)Boron ug/L 200.7 210,000 B 190,000 B 150,000 B 200,000 B 188,000Cadmium ug/L 200.8 28.0 24.0 17.0 22.0 22.8Calcium ug/L 200.7 2,300,000 2,100,000 1,600,000 2,100,000 2,030,000Chromium ug/L 200.8 ND (8.00) ^ ND (8.00) ^ ND (8.00) ^ ND (8.00) ^ ND (8.00)Chromium (VI) ug/L 218.6 ND (10.0) ND (10.0) ND (10.0) ND (10.0) ND (10.0)

# 4-5< - Average result includes at least one value measured belowthe quantitation limit. (Calculation uses 1⁄2 the quantitation limit for values below the quantitation limit).ND – Not detected (number in parentheses is the quantitation limit).NQ – Analyte was measured above the method detection limit, butbelow the quantitation limit (number shown in parentheses is the quantitation limit). The analytical result ispresented in Appendix A with a J flag designation. A “NQ” for the 4-day average result indicates that all results were below the quantitation limit, but at least one result is a Jvalue.^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.** - The accuracy of the Day 1 total dissolved solid result seems questionable based on the results from the other sampling days. If the Day 1 total dissolved solid result wasexcluded from the calculated average, the 4-day average would be 12,700 mg/L.B – Analyte was found in the blank and sample.C – pH upon receipt was less than 10 S.U.D – Laboratory duplicate RPD greater than method-specified criteria.L – LFB or LCS percent recovery not within method-specified criteria, but iswithin laboratory-specified criteria.Table 4-1. Influent to FGD Wastewater Treatment System, DickersonAnalyteUnitsMethodInfluent to FGD Wastewater Treatment System (SP-1)Day 1Day 2Day 3Day 44-DayAverageCobalt ug/L 200.7 81.0 77.0 58.0 71.0 71.8Copper ug/L 200.8 26.0 12.0 8.30 9.20 13.9Iron ug/L 200.7 NQ (200) NQ (200) NQ (200) NQ (200) NQ (200)Lead ug/L 200.8 ND (2.00) ND (2.00) ND (2.00) ND (2.00) ND (2.00)Magnesium ug/L 200.7 1,600,000 1,500,000 1,200,000 1,500,000 1,450,000Manganese ug/L 200.7 11,000 10,000 8,100 10,000 9,780Mercury ng/L 1631E 177 49.7 193 24.4 111Molybdenum ug/L 200.7 250 210 180 220 215Nickel ug/L 200.8 460 420 310 380 393Selenium ug/L 200.8 150 210 150 180 173Silver ug/L 200.8 ND (2.00) ND (2.00) ND (2.00) ND (2.00) ND (2.00)Sodium ug/L 200.7 210,000 200,000 160,000 200,000 193,000Thallium ug/L 200.8 2.40 NQ (2.00) NQ (2.00) NQ (2.00) < 1.35Tin ug/L 200.7 ND (200) ND (200) ND (200) ND (200) ND (200)Titanium ug/L 200.7 ND (20.0) ND (20.0) ND (20.0) ND (20.0) ND (20.0)Vanadium ug/L 200.8 NQ (10.0) NQ (10.0) NQ (10.0) NQ (10.0) NQ (10.0)Zinc ug/L 200.7 1,300 700 370 450 705

# 4-6Note: The Day 3 results represent the average of the original sample and the field duplicate (SP-4). See Section 5.2.4 for theanalytical results for the individual samples.< - Average result includes at least one value measured belowthe quantitation limit. (Calculation uses 1⁄2 the quantitation limit for values below the quantitation limit).ND – Not detected (number in parentheses is the quantitation limit).NQ – Analyte was measured above the method detection limit, butbelow the quantitation limit (number shown in parentheses is the quantitation limit). The analytical result ispresented in Appendix A with a J flag designation. A “NQ” for the 4-day average result indicates that all results were below the quantitation limit, but at least one result is a Jvalue.^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.** - The Day 3 influent to the SBR systemwas detected at a concentration of 42.8 ng/L, which seems like an erroneous result compared to the Day 3 duplicate sampleconcentration and the other three sample days. For presentation purposes in this table, the original sample result has been removed from the average of the Day 3 result and fromthe calculation of the 4-day average result.4 – MS and/or MSD did not meet laboratorycriteria, but sample concentration is fourtimes greater thanthe matrix spike amount, so control limits are not applicable.B – Analyte was found in the blank and sample.F – MS and/or MSD not within laboratory control limits.Table 4-2. Influent tothe SBR System, DickersonAnalyteUnitsMethodInfluent to the SBR System (SP-2)Day 1Day 2Day 3Day 44-DayAverageClassicalsAmmoniamg/L350.14.404.103.103.203.70Nitrate Nitrite as Nmg/L353.248.043.038.037.041.5Nitrogen, Total Kjeldahlmg/L351.210.0BNQ (10.0)B10.5NQ (10.0)B< 7.63Biochemical Oxygen Demandmg/L5210B4.003.00NQ (2.50)2.80< 2.76Chemical Oxygen Demandmg/L410.416081.0135130F127Chloridemg/L300.08,6007,8006,7006,7007,450Sulfatemg/L300.01,8001,6001,7501,7001,710Cyanide, Totalmg/L4500 CN E0.220B0.130B0.05200.0500B0.113Total Dissolved Solidsmg/L2540C14,00014,00012,50012,00013,100Total Suspended Solidsmg/L2540D38.037.070.542.046.9Phosphorus, Totalmg/L365.1NQ (0.0500)NQ (0.0500)< 0.0375NQ (0.0500)< 0.0281Total MetalsAluminumug/L200.76004501,4501,5001,000Antimonyug/L200.85.504.404.603.904.60Arsenicug/L200.8NQ (4.00)NQ (4.00)4.955.50< 3.61Bariumug/L200.7300260250230260Berylliumug/L200.7ND (2.00)ND (2.00)ND (2.00)ND (2.00)ND (2.00)Boronug/L200.7170,000B170,000B160,000150,000B,4163,000Cadmiumug/L200.8NQ (4.00)NQ (4.00)NQ (4.00)NQ (4.00)NQ (4.00)Calciumug/L200.72,600,0002,400,0002,250,0002,100,00042,340,000Chromiumug/L200.8NQ (8.00)^NQ (8.00)^NQ (8.00)NQ (8.00)^NQ (8.00)

# 4-7Note: The Day 3 results represent the average of the original sample and the field duplicate (SP-4). See Section 5.2.4 for theanalytical results for the individual samples.< - Average result includes at least one value measured belowthe quantitation limit. (Calculation uses 1⁄2 the quantitation limit for values below the quantitation limit).ND – Not detected (number in parentheses is the quantitation limit).NQ – Analyte was measured above the method detection limit, butbelow the quantitation limit (number shown in parentheses is the quantitation limit). The analytical result ispresented in Appendix A with a J flag designation. A “NQ” for the 4-day average result indicates that all results were below the quantitation limit, but at least one result is a Jvalue.^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.** - The Day 3 influent to the SBR systemwas detected at a concentration of 42.8 ng/L, which seems like an erroneous result compared to the Day 3 duplicate sampleconcentration and the other three sample days. For presentation purposes in this table, the original sample result has been removed from the average of the Day 3 result and fromthe calculation of the 4-day average result.4 – MS and/or MSD did not meet laboratorycriteria, but sample concentration is fourtimes greater thanthe matrix spike amount, so control limits are not applicable.B – Analyte was found in the blank and sample.F – MS and/or MSD not within laboratory control limits.Table 4-2. Influent tothe SBR System, DickersonAnalyteUnitsMethodInfluent to the SBR System (SP-2)Day 1Day 2Day 3Day 44-DayAverageCobaltug/L200.7NQ (20.0)NQ (20.0)NQ (20.0)NQ (20.0)NQ (20.0)Copperug/L200.843.046.055.598.060.6Ironug/L200.77405701,7001,8001,200Leadug/L200.82.70NQ (2.00)3.655.00< 3.09Magnesiumug/L200.71,200,0001,200,0001,200,0001,100,00041,180,000Manganeseug/L200.790.0110265300191Mercuryng/L1631E222200446416321Molybdenumug/L200.7300260245230259Nickelug/L200.860.051.050.550.052.9Seleniumug/L200.8130110105100111Silverug/L200.8ND (2.00)ND (2.00)ND (2.00)ND (2.00)FND (2.00)Sodiumug/L200.7200,000200,000185,000180,000191,000Thalliumug/L200.8NQ (2.00)NQ (2.00)NQ (2.00)NQ (2.00)NQ (2.00)Tinug/L200.7ND (200)ND (200)ND (200)ND (200)ND (200)Titaniumug/L200.746.035.099.510070.1Vanadiumug/L200.8NQ (10.0)NQ (10.0)10.511.0< 7.88Zincug/L200.7NQ (40.0)NQ (40.0)53.065.0< 39.5Dissolved MetalsAluminumug/L200.7ND (200)NQ (200)NQ (200)NQ (200)NQ (200)Antimonyug/L200.84.804.803.604.104.33Arsenicug/L200.8NQ (4.00)NQ (4.00)NQ (4.00)NQ (4.00)NQ (4.00)Bariumug/L200.7280250190170223

# 4-8Note: The Day 3 results represent the average of the original sample and the field duplicate (SP-4). See Section 5.2.4 for theanalytical results for the individual samples.< - Average result includes at least one value measured belowthe quantitation limit. (Calculation uses 1⁄2 the quantitation limit for values below the quantitation limit).ND – Not detected (number in parentheses is the quantitation limit).NQ – Analyte was measured above the method detection limit, butbelow the quantitation limit (number shown in parentheses is the quantitation limit). The analytical result ispresented in Appendix A with a J flag designation. A “NQ” for the 4-day average result indicates that all results were below the quantitation limit, but at least one result is a Jvalue.^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.** - The Day 3 influent to the SBR systemwas detected at a concentration of 42.8 ng/L, which seems like an erroneous result compared to the Day 3 duplicate sampleconcentration and the other three sample days. For presentation purposes in this table, the original sample result has been removed from the average of the Day 3 result and fromthe calculation of the 4-day average result.4 – MS and/or MSD did not meet laboratorycriteria, but sample concentration is fourtimes greater thanthe matrix spike amount, so control limits are not applicable.B – Analyte was found in the blank and sample.F – MS and/or MSD not within laboratory control limits.Table 4-2. Influent tothe SBR System, DickersonAnalyteUnitsMethodInfluent to the SBR System (SP-2)Day 1Day 2Day 3Day 44-DayAverageBerylliumug/L200.7ND (2.00)ND (2.00)ND (2.00)ND (2.00)ND (2.00)Boronug/L200.7180,000B170,000B160,000160,000B,4168,000Cadmiumug/L200.8NQ (4.00)NQ (4.00)NQ (4.00)NQ (4.00)NQ (4.00)Calciumug/L200.72,600,0002,500,0002,300,0002,200,00042,400,000Chromiumug/L200.8ND (8.00)^ND (8.00)^ND (8.00)ND (8.00)^ND (8.00)Chromium (VI)ug/L218.6ND (10.0)ND (10.0)ND (10.0)ND (10.0)ND (10.0)Cobaltug/L200.7NQ (20.0)NQ (20.0)NQ (20.0)NQ (20.0)NQ (20.0)Copperug/L200.840.045.045.069.049.8Ironug/L200.7ND (200)ND (200)ND (200)ND (200)ND (200)Leadug/L200.8NQ (2.00)NQ (2.00)ND (2.00)ND (2.00)NQ (2.00)Magnesiumug/L200.71,200,0001,300,0001,200,0001,200,00041,230,000Manganeseug/L200.770.0100210250158Mercuryng/L1631E5.976.785.56**5.816.03**Molybdenumug/L200.7290260240230255Nickelug/L200.854.051.049.550.051.1Seleniumug/L200.812011097.095.0106Silverug/L200.8ND (2.00)ND (2.00)ND (2.00)ND (2.00)FND (2.00)Sodiumug/L200.7190,000190,000180,000180,000185,000Thalliumug/L200.8NQ (2.00)NQ (2.00)NQ (2.00)NQ (2.00)NQ (2.00)Tinug/L200.7ND (200)ND (200)ND (200)ND (200)ND (200)Titaniumug/L200.7NQ (20.0)NQ (20.0)NQ (20.0)NQ (20.0)NQ (20.0)Vanadiumug/L200.8NQ (10.0)NQ (10.0)NQ (10.0)NQ (10.0)NQ (10.0)

# 4-9Note: The Day 3 results represent the average of the original sample and the field duplicate (SP-4). See Section 5.2.4 for theanalytical results for the individual samples.< - Average result includes at least one value measured belowthe quantitation limit. (Calculation uses 1⁄2 the quantitation limit for values below the quantitation limit).ND – Not detected (number in parentheses is the quantitation limit).NQ – Analyte was measured above the method detection limit, butbelow the quantitation limit (number shown in parentheses is the quantitation limit). The analytical result ispresented in Appendix A with a J flag designation. A “NQ” for the 4-day average result indicates that all results were below the quantitation limit, but at least one result is a Jvalue.^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.** - The Day 3 influent to the SBR systemwas detected at a concentration of 42.8 ng/L, which seems like an erroneous result compared to the Day 3 duplicate sampleconcentration and the other three sample days. For presentation purposes in this table, the original sample result has been removed from the average of the Day 3 result and fromthe calculation of the 4-day average result.4 – MS and/or MSD did not meet laboratorycriteria, but sample concentration is fourtimes greater thanthe matrix spike amount, so control limits are not applicable.B – Analyte was found in the blank and sample.F – MS and/or MSD not within laboratory control limits.Table 4-2. Influent tothe SBR System, DickersonAnalyteUnitsMethodInfluent to the SBR System (SP-2)Day 1Day 2Day 3Day 44-DayAverageZincug/L200.7NQ (40.0)NQ (40.0)NQ (40.0)45.0< 26.3

# 4-10Note: The Day 2 results represent the average of the original sample and the field duplicate (SP-5). See Section 5.2.4 for theanalytical results for the individual samples.< - Average result includes at least one value measured belowthe quantitation limit. (Calculation uses 1⁄2 the quantitation limit for values below the quantitation limit).ND – Not detected (number in parentheses is the quantitation limit).NQ – Analyte was measured above the method detection limit, butbelow the quantitation limit (number shown in parentheses is the quantitation limit). The analytical result ispresented in Appendix A with a J flag designation. A “NQ” for the 4-day average result indicates that all results were below the quantitation limit, but at least one result is a Jvalue.^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.4 – MS and/or MSD did not meet laboratorycriteria, but sample concentration is fourtimes greater thanthe matrix spike amount, so control limits are not applicable.B – Analyte was found in the blank and sample.F – MS and/or MSD not within laboratory control limits.Table 4-3. Effluent fromthe SBR System, DickersonAnalyteUnitsMethodEffluent from the SBR System (SP-3)Day 1Day 2Day 3Day 44-DayAverageClassicalsAmmonia mg/L 350.1 NQ (1.00) NQ (1.00) NQ (1.00) NQ (1.00) NQ (1.00)Nitrate Nitrite as N mg/L 353.2 NQ (0.100) 0.110 0.140 0.150 < 0.113Nitrogen, Total Kjeldahl mg/L 351.2 13.0 B 13.0 13.0 B,4 13.0 B 13.0Biochemical Oxygen Demand mg/L 5210B 3.90 4.70 5.70 4.50 4.70Chemical Oxygen Demand mg/L 410.4 150 185 140 F 84.0 140Chloride mg/L 300.0 9,700 8,000 7,800 7,600 8,280Sulfate mg/L 300.0 1,800 1,700 1,700 1,700 1,730Cyanide, Total mg/L 4500 CN E 0.100 B NQ (0.0100) NQ (0.0100) B,F NQ (0.0100) B < 0.0288Total Dissolved Solids mg/L 2540C 15,000 13,500 14,000 13,000 13,900Total Suspended Solids mg/L 2540D 8.80 14.0 8.00 14.0 11.2Phosphorus, Total mg/L 365.1 NQ (0.0500) NQ (0.0500) NQ (0.0500) NQ (0.0500) NQ (0.0500)Total MetalsAluminum ug/L 200.7 660 710 870 920 790Antimony ug/L 200.8 5.00 5.50 5.10 4.60 5.05Arsenic ug/L 200.8 NQ (4.00) NQ (4.00) NQ (4.00) NQ (4.00) NQ (4.00)Barium ug/L 200.7 310 305 280 230 281Beryllium ug/L 200.7 ND (2.00) ND (2.00) ND (2.00) ND (2.00) ND (2.00)Boron ug/L 200.7 180,000 B 185,000 180,000 B,4 170,000 B 179,000Cadmium ug/L 200.8 NQ (4.00) NQ (4.00) NQ (4.00) NQ (4.00) NQ (4.00)Calcium ug/L 200.7 2,700,000 2,750,000 2,700,000 4 2,400,000 2,640,000Chromium ug/L 200.8 ND (8.00) ^ ND (8.00) ND (8.00) ^ ND (8.00) ^ ND (8.00)Cobalt ug/L 200.7 NQ (20.0) NQ (20.0) NQ (20.0) NQ (20.0) NQ (20.0)Copper ug/L 200.8 21.0 22.0 21.0 32.0 24.0Iron ug/L 200.7 NQ (200) NQ (200) NQ (200) NQ (200) NQ (200)Lead ug/L 200.8 NQ (2.00) NQ (2.00) NQ (2.00) NQ (2.00) NQ (2.00)Magnesium ug/L 200.7 1,300,000 1,250,000 1,300,000 4 1,200,000 1,260,000

# 4-11Note: The Day 2 results represent the average of the original sample and the field duplicate (SP-5). See Section 5.2.4 for theanalytical results for the individual samples.< - Average result includes at least one value measured belowthe quantitation limit. (Calculation uses 1⁄2 the quantitation limit for values below the quantitation limit).ND – Not detected (number in parentheses is the quantitation limit).NQ – Analyte was measured above the method detection limit, butbelow the quantitation limit (number shown in parentheses is the quantitation limit). The analytical result ispresented in Appendix A with a J flag designation. A “NQ” for the 4-day average result indicates that all results were below the quantitation limit, but at least one result is a Jvalue.^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.4 – MS and/or MSD did not meet laboratorycriteria, but sample concentration is fourtimes greater thanthe matrix spike amount, so control limits are not applicable.B – Analyte was found in the blank and sample.F – MS and/or MSD not within laboratory control limits.Table 4-3. Effluent fromthe SBR System, DickersonAnalyteUnitsMethodEffluent from the SBR System (SP-3)Day 1Day 2Day 3Day 44-DayAverageManganese ug/L 200.7 81.0 84.5 100 160 106Mercury ng/L 1631E 7.27 9.65 10.9 8.59 9.10Molybdenum ug/L 200.7 320 315 300 260 299Nickel ug/L 200.8 78.0 64.0 58.0 50.0 62.5Selenium ug/L 200.8 110 110 110 100 108Silver ug/L 200.8 ND (2.00) ND (2.00) ND (2.00) F ND (2.00) ND (2.00)Sodium ug/L 200.7 220,000 225,000 230,000 4 220,000 224,000Thallium ug/L 200.8 NQ (2.00) NQ (2.00) NQ (2.00) NQ (2.00) NQ (2.00)Tin ug/L 200.7 ND (200) ND (200) ND (200) ND (200) ND (200)Titanium ug/L 200.7 NQ (20.0) NQ (20.0) NQ (20.0) NQ (20.0) NQ (20.0)Vanadium ug/L 200.8 NQ (10.0) NQ (10.0) NQ (10.0) NQ (10.0) NQ (10.0)Zinc ug/L 200.7 43.0 42.5 NQ (40.0) NQ (40.0) < 31.4Dissolved MetalsAluminum ug/L 200.7 NQ (200) NQ (200) NQ (200) NQ (200) NQ (200)Antimony ug/L 200.8 5.70 5.10 4.50 4.80 5.03Arsenic ug/L 200.8 NQ (4.00) NQ (4.00) NQ (4.00) NQ (4.00) NQ (4.00)Barium ug/L 200.7 320 300 270 230 280Beryllium ug/L 200.7 ND (2.00) ND (2.00) ND (2.00) ND (2.00) ND (2.00)Boron ug/L 200.7 190,000 B 180,000 180,000 B,4 170,000 B 180,000Cadmium ug/L 200.8 NQ (4.00) NQ (4.00) NQ (4.00) NQ (4.00) NQ (4.00)Calcium ug/L 200.7 2,800,000 2,750,000 2,700,000 4 2,400,000 2,660,000Chromium ug/L 200.8 ND (8.00) ^ ND (8.00) ND (8.00) ^ ND (8.00) ^ ND (8.00)Chromium (VI) ug/L 218.6 ND (10.0) ND (10.0) ND (10.0) ND (10.0) ND (10.0)Cobalt ug/L 200.7 NQ (20.0) NQ (20.0) NQ (20.0) NQ (20.0) NQ (20.0)Copper ug/L 200.8 16.0 17.5 13.0 20.0 16.6Iron ug/L 200.7 NQ (200) NQ (200) NQ (200) NQ (200) NQ (200)Lead ug/L 200.8 NQ (2.00) NQ (2.00) ND (2.00) ND (2.00) NQ (2.00)

# 4-12Note: The Day 2 results represent the average of the original sample and the field duplicate (SP-5). See Section 5.2.4 for theanalytical results for the individual samples.< - Average result includes at least one value measured belowthe quantitation limit. (Calculation uses 1⁄2 the quantitation limit for values below the quantitation limit).ND – Not detected (number in parentheses is the quantitation limit).NQ – Analyte was measured above the method detection limit, butbelow the quantitation limit (number shown in parentheses is the quantitation limit). The analytical result ispresented in Appendix A with a J flag designation. A “NQ” for the 4-day average result indicates that all results were below the quantitation limit, but at least one result is a Jvalue.^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.4 – MS and/or MSD did not meet laboratorycriteria, but sample concentration is fourtimes greater thanthe matrix spike amount, so control limits are not applicable.B – Analyte was found in the blank and sample.F – MS and/or MSD not within laboratory control limits.Table 4-3. Effluent fromthe SBR System, DickersonAnalyteUnitsMethodEffluent from the SBR System (SP-3)Day 1Day 2Day 3Day 44-DayAverageMagnesium ug/L 200.7 1,300,000 1,300,000 1,300,000 4 1,200,000 1,280,000Manganese ug/L 200.7 85.0 85.0 100 160 108Mercury ng/L 1631E 1.69 4.28 8.61 F 1.21 3.95Molybdenum ug/L 200.7 330 315 290 260 299Nickel ug/L 200.8 78.0 66.5 57.0 51.0 63.1Selenium ug/L 200.8 100 105 98.0 98.0 100Silver ug/L 200.8 ND (2.00) ND (2.00) ND (2.00) F ND (2.00) ND (2.00)Sodium ug/L 200.7 220,000 220,000 220,000 4 210,000 218,000Thallium ug/L 200.8 NQ (2.00) NQ (2.00) NQ (2.00) NQ (2.00) NQ (2.00)Tin ug/L 200.7 ND (200) ND (200) ND (200) ND (200) ND (200)Titanium ug/L 200.7 NQ (20.0) NQ (20.0) NQ (20.0) NQ (20.0) NQ (20.0)Vanadium ug/L 200.8 NQ (10.0) NQ (10.0) NQ (10.0) NQ (10.0) NQ (10.0)Zinc ug/L 200.7 43.0 < 31.0 NQ (40.0) NQ (40.0) < 28.5

# 4-13< - Average result includes at least one value measured belowthe quantitation limit. (Calculation uses 1⁄2 the quantitation limit for values below the quantitation limit).* - The 4-day average result includes an analytical result where the accuracy is questionable. If the questionable result wasexcluded from the calculated average, the 4-dayaverage would be 12,700 mg/L.NQ – Analyte was measured above the method detection limit, butbelow the quantitation limit (number shown in parentheses is the quantitation limit). The analytical result ispresented in Appendix A with a J flag designation. A “NQ” for the 4-day average result indicates that all results were below the quantitation limit, but at least one result is a Jvalue.Table 4-4. Classical Pollutants 4-Day Average DataSummary for FGD Wastewater Treatment System, DickersonAnalyteUnitsMethodInfluent to FGDWastewaterTreatment System (SP-1)4-Day AverageInfluent toSBRSystem (SP-2)4-Day AverageEffluent fromSBRSystem (SP-3)4-Day AverageClassicalsAmmoniamg/L350.15.053.70NQ (1.00)Nitrate Nitrite as Nmg/L353.260.841.5< 0.113Nitrogen, Total Kjeldahlmg/L351.246.5< 7.6313.0Biochemical Oxygen Demandmg/L5210B< 4.81< 2.764.70Chemical Oxygen Demandmg/L410.4130127140Chloridemg/L300.07,6807,4508,280Sulfatemg/L300.01,7801,7101,730Cyanide, Totalmg/L4500 CN E0.9500.113< 0.0288Total Dissolved Solidsmg/L2540C52,000*13,10013,900Total Suspended Solidsmg/L2540D5,63046.911.2Phosphorus, Totalmg/L365.1< 2.81< 0.0281NQ (0.0500)

# 4-14< - Average result includes at least one value measured belowthe quantitation limit. (Calculation uses 1⁄2 the quantitation limit for values below the quantitation limit).* - The 4-day average result presented has been revised to exclude the Day 3 original sample result because it is an erroneousresult based on the Day 3 duplicate sample result andthe results from the other sampling days.ND – Not detected (number in parentheses is the quantitation limit).NQ – Analyte was measured above the method detection limit, butbelow the quantitation limit (number shown in parentheses is the quantitation limit). The analytical result ispresented in Appendix A with a J flag designation. A “NQ” for the 4-day average result indicates that all results were below the quantitation limit, but at least one result is a Jvalue.Table 4-5. Metal Pollutants 4-Day Average Data Summary for FGD Wastewater Treatment System, DickersonAnalyteUnitsMethodInfluent to FGDWastewater TreatmentSystem (SP-1)4-Day AverageInfluent toSBRSystem (SP-2)4-Day AverageEffluent fromSBRSystem (SP-3)4-Day AverageTotalDissolvedTotalDissolvedTotalDissolvedMetalsAluminumug/L200.7110,000NQ (200)1,000NQ (200)790NQ (200)Antimonyug/L200.818.83.454.604.335.055.03Arsenicug/L200.8230NQ (4.00)< 3.61NQ (4.00)NQ (4.00)NQ (4.00)Bariumug/L200.7700183260223281280Berylliumug/L200.712.5ND (2.00)ND (2.00)ND (2.00)ND (2.00)ND (2.00)Boronug/L200.7193,000188,000163,000168,000179,000180,000Cadmiumug/L200.826.522.8NQ (4.00)NQ (4.00)NQ (4.00)NQ (4.00)Calciumug/L200.72,700,0002,030,0002,340,0002,400,0002,640,0002,660,000Chromiumug/L200.8570ND (8.00)NQ (8.00)ND (8.00)ND (8.00)ND (8.00)Chromium (VI)ug/L218.6NAND (10.0)NAND (10.0)NAND (10.0)Cobaltug/L200.711771.8NQ (20.0)NQ (20.0)NQ (20.0)NQ (20.0)Copperug/L200.854313.960.649.824.016.6Ironug/L200.7158,000NQ (200)1,200ND (200)NQ (200)NQ (200)Leadug/L200.8178ND (2.00)< 3.09NQ (2.00)NQ (2.00)NQ (2.00)Magnesiumug/L200.71,530,0001,450,0001,180,0001,230,0001,260,0001,280,000Manganeseug/L200.79,6309,780191158106108Mercuryng/L1631E5,7601113216.03*9.103.95Molybdenumug/L200.7440215259255299299Nickelug/L200.856539352.951.162.563.1Seleniumug/L200.81,210173111106108100Silverug/L200.8ND (2.00)ND (2.00)ND (2.00)ND (2.00)ND (2.00)ND (2.00)Sodiumug/L200.7185,000193,000191,000185,000224,000218,000Thalliumug/L200.8< 1.48< 1.35NQ (2.00)NQ (2.00)NQ (2.00)NQ (2.00)

# 4-15< - Average result includes at least one value measured belowthe quantitation limit. (Calculation uses 1⁄2 the quantitation limit for values below the quantitation limit).* - The 4-day average result presented has been revised to exclude the Day 3 original sample result because it is an erroneousresult based on the Day 3 duplicate sample result andthe results from the other sampling days.ND – Not detected (number in parentheses is the quantitation limit).NQ – Analyte was measured above the method detection limit, butbelow the quantitation limit (number shown in parentheses is the quantitation limit). The analytical result ispresented in Appendix A with a J flag designation. A “NQ” for the 4-day average result indicates that all results were below the quantitation limit, but at least one result is a Jvalue.Table 4-5. Metal Pollutants 4-Day Average Data Summary for FGD Wastewater Treatment System, DickersonAnalyteUnitsMethodInfluent to FGDWastewater TreatmentSystem (SP-1)4-Day AverageInfluent toSBRSystem (SP-2)4-Day AverageEffluent fromSBRSystem (SP-3)4-Day AverageTotalDissolvedTotalDissolvedTotalDissolvedTinug/L200.7NQ (200)ND (200)ND (200)ND (200)ND (200)ND (200)Titaniumug/L200.75,430ND (20.0)70.1NQ (20.0)NQ (20.0)NQ (20.0)Vanadiumug/L200.8483NQ (10.0)< 7.88NQ (10.0)NQ (10.0)NQ (10.0)Zincug/L200.72,000705< 39.5< 26.3< 31.4< 28.5Quality assurance/quality control (QA/QC)procedures applicable to the Dickersonsampling episode are outlined in theQuality Assurance Project Plan for the Steam ElectricRulemaking(QAPP)[2]. This section describes the QC procedures used to assess the precisionand accuracy of the analytical data presented inSection 4 and Appendix A. QC practices usedfor this sampling episode include the analysis ofmatrix spikes, blanks, duplicate samples, andQC standard checks.5.1Analytical Quality ControlERG contracted directly with analytical laboratories for the analysis of samples collectedduring this episode. ERG verified that the performance of the laboratories selected wasacceptable by conducting QC checks of the analytical data. Data review chemists at ERGprepared written data review narratives describing any qualificationsof the analytical data fromthis episode. The data review narratives are included in Appendix B.5.2Field Quality ControlThis subsection discusses the bottle blanks,equipment blanks, field blanks, and fieldduplicate sample results. Section 3.8 of the Sampling Plan discusses field QC specifications.5.2.1Bottle BlanksERG collects bottle blanks to evaluate possible contamination from the sample collectionbottles. Bottle blanks were collected andanalyzed for metals (EPA Method 200.8, 200.7, and1631E) by the supplier of the precleaned bottles, Frontier Global Sciences.Frontier Global Sciences collected the bottle blanks for the metals sample bottles byfilling the precleaned bottle with reagent water, preserving the sample with nitric acid to a pH <2S.U. Frontier Global Sciences then analyzed the samples using EPA Method 1638.Frontier Global Sciences collected the bottle blanks for the mercury sample bottles byfilling the precleaned bottle with reagent water, preserving the sample with brominemonochloride. Frontier Global Sciences thenanalyzed the samples using EPA Method 1631E.Albion Environmental collected the bottle blanks for the 10- and 20-liter compositecontainers by filling the container with approximately two liters of ASTM Type 1 water andallowing it to soak for approximately 24 hours.During this period, the laboratory shook thecontainer periodically and changed its orientationto expose all surfaces ofthe container to theASTM Type 1 water. Albion Environmental then shook the 10- and 20-liter containers andpoured a representative sample into a precleanedLDPE sample bottle. The blank samples werethen preserved and analyzed according to the analytical methods (i.e., EPA Method 1638).No metals were detected in the bottle blanks, except for aluminum in the 10-litercomposite containers. Aluminum was detected inthe 10-L container ata concentration of 4.71ug/L, which is well below the quantitation limit used for the sample analyses (i.e., 200 ug/L);collectthe metals andmercury samples.5.2.2Equipment BlanksEPA collects equipment blanks to evaluatepossible contamination from the equipmentused for sample collection. The techniques used tocollect field blanks (as described in Section5.2.3) include the sampling equipment and therefore would identify whether the samplingequipment was introducing contamination. In addition, Frontier Global Sciences collected andanalyzed equipment blanks for metals (EPA Method 1638 and 1631E) for each type ofprecleaned equipment supplied for the episode.Frontier Global Sciences collected the equipment blanks for the capsule filters andfabricated tubing sets by pumping reagent water through the cleaned and fully assembledequipment sets (with the filter attached) intoa cleaned bottle (an HDPE bottle for metals and aglass bottle for mercury). The blank samples werethen preserved and analyzed according to theanalytical methods (EPA Method 1638 and 1631E),as described in Section 5.2.1 for the bottleblank samples.No other metals were detected in the equipment blanks, indicating that there was nocontamination from the sampling equipment. Appendix Table A-15 presents all of the analyticalresults from the bottle blank and equipment blankanalyses for all of the equipment used for thecollection of metals and mercury samples.5.2.3Field BlanksThe sampling team collected field blanks(SP-6, SP-7, and SP-8) to evaluate possiblecontamination from sampling equipment, sampling equipment decontamination procedures,sample collection procedures, or atmosphericcontamination. EPA analyzed the field blanksamples for the total and dissolved metals and total and dissolved mercury samples3.The total mercury, total metals by 200.8, andtotal metals by 200.7 field blank samplesfor the influent to the FGD wastewater treatment system (SP-6) were collected by pouringASTM Type 1 water through a precleaned funnel attached to the silicone tubing used for samplecollection. To prevent potential atmospheric deposition, the sampling team shrouded the blankwater and funnel with a plasticbag while pouring the blank waterinto the funnel and placed thesample bottles in a “cleanbox.” Prior to filling the sample bottles, the tubing was purged withapproximately 0.5 liters of blank water. TheASTM Type 1 water flowed through the funnel,tubing, and “Y” splitter, and was poured into thesample bottles. EPA collected the field blanksamples as “true” split samples with Dickerson’s representative, using the same procedurediscussed in the sample collection description (Section 3.1).3EPA did not collect a dissolved mercury field blank sample because the sample filtration was performed at thelaboratory to minimize potential mercury contamination. The laboratory performed a filtration blank prior tofiltering the sample, which is assessed as the field blank for the dissolved mercury sample. Mercury was notdetected above the method detection limit (0 24 ng/L) in the filtration blanks performed for any of the samplingchromiumfieldblanksamplesfortheinfluenttotheFGDwastewatertreatmentsystem(SP-6)were collected by pouring ASTM Type 1 water through the funnel and tubing and into a 10-litercomposite container. After around 90 minutes,the sampling team began pumping off the ASTMType 1 water from the 10-liter composite container. Prior to filling the sample bottles, the tubingwas purged with 1 liter of blank water. The sample bottles were placed in a “cleanbox” and theASTM Type 1 water was pumped through the tubing,capsule filter, and “Y”splitter, and into thesample bottles. EPA collected the field blank samples as “true” split samples with Dickerson’srepresentative, using the same procedure discussed in the sample collection description (Section3.1).The total mercury field blank sample for the influent to the SBR (SP-7) and for theeffluent from the SBR (SP-8) were collected by shrouding one of the three taps on the sample tapsplitter with a clear plastic bag. Before purging the sampletap, ASTM Type 1 water was poureddirectly into the sample bottles under the clear plastic bag.The total and dissolved metals by 200.7 andmetals by 200.8 field blank samples for theinfluent to the SBR (SP-7) andthe effluent from the SBR (SP-8)were collected by filling a 20-liter composite container with ASTM Type 1 water. The same T-splitter tubing used to fill themetals composite container at each point was used with a pump to fillthe 20-liter field blankcomposite container. Prior to attaching one endof the tubing to the sample tap, it was placeddirectly into the container holding ASTM Type1 water. The other end of the tubing wasattached to the vented cap on top of the 20-liter field blank compositecontainer. After enoughvolume was pumped into the 20-liter field blank composite container, the vented cap wasreplaced with a closed cap and the container was placed on ice in a covered plastic trash can.The vented cap used for the field blank collection was the same cap that was later used for themetals composite container.After 24 hours, the ASTM Type 1 water in the 20-liter field blank composite containerwas pumped off into the individual sample bottles. The sample bottles were placed in a“cleanbox” and the ASTM Type 1 water was pumped through the tubingand “Y” splitter, andinto the sample bottles. EPA collected the field blank samples as “true” split samples withDickerson’s representative, using the same procedure discussed in the sample collectiondescription (Section 3.1).Prior to filling the sample bottles, the tubing was purged withapproximately one liter of ASTM Type 1 water.First the samplers collected the total metals by200.8 and total metals by 200.7 field blank samples.Then the sampling team attached a filter tothe tubing set and purged the tubing with approximately one liter of ASTM Type 1 water. Thesamplers then collected thedissolved metals by200.8, dissolved metals by 200.7, and dissolvedhexavalent chromium field blank samples.Table 5-1 presents the fieldblank analytical results forSP-6 through SP-8. Only thoseanalytes that were detected in the field blanksamples at levels above the quantitation limit areincluded in the table. Results are rounded tothree significant digits. Appendix Tables A-16through A-24 present all the analytical results for the field blanks from each of the samplingpoints, including all qualified results and allresults that were measured above the methoddetection limit, but below the quantitation limit (i.e., J-values).The sampling team collected field duplicatesamples to assess the sampling measurementprecision for the episode. Field duplicate samples are separate samples collected from the samelocation as the original sample. The duplicate isfilled immediately after the original sample andis stored and analyzed independently. The RPD between the two sample results is examined todetermine the precision of the data. EPA usedthe following equation to calculate the RPD forthe duplicate sample results.1002DSDS(%)RPD(5-1)where:S = concentration of the analyte from original sample analysis;D = concentration of the analyte fromthe duplicate sample analysis; andRPD = relative percent difference between the original and duplicate sampleresult.During this sampling episode, EPA collected duplicate samples for the influent to theSBR (SP-4) and the effluent from the SBR (SP-5) during day 3 and day 2 of the samplingepisode, respectively. The duplicate samples were analyzed for all analytes. Tables 5-2 and 5-3present the analytical results and the RPD forSP-4 and SP-5, respectively. Results are roundedto three significant digits. Appendix Tables A-7 and A-13 present all the analytical results for theinfluent to the SBR (SP-2) Day 3 and the duplicate of the influent to the SBR (SP-4) sampleanalyses, including all qualifiedresults and all results that were measured above the methoddetection limit, but below the quantitation limit (i.e., J-values). Appendix Tables A-10 and A-14present all the analytical results for the effluentfrom the SBR (SP-3) Day 2 and the duplicate ofthe effluent from the SBR (SP-5)sample analyses, including allqualified results and all resultsthat were measured above the method detection limit, but below the quantitation limit (i.e., Jvalues).

# Table 5-1. Field Blank Anal ytical Results, Dickerson

Analyte Sample Description Method Units Concentration

Mercury Influent to FGD Wastewater Treatment System Field Blank - Day 1 1631E ng/L 0.730< - Average result includes at least one value measured belowthe quantitation limit. (Calculation uses 1⁄2 the quantitation limit for values below the quantitation limit).* - The dissolved mercury original sample result seems erroneousbased on the Day 3 duplicate sample concentration and the other three sample days. The original sample resultwas excluded from the presentation of the Day 3 average result inTable 4-2. Additionally, 5.56ng/L (instead of 24.2 ng/L) was used in the calculation of the 4-day average resultpresented in Table 4-2 and 4-5.NC – Not calculated.ND – Not detected (number in parentheses is the quantitation limit).NQ – Analyte was measured above the method detection limit, butbelow the quantitation limit (number shown in parentheses is the quantitation limit). The analytical result ispresented in Appendix A with a J flag designation. A “NQ” for the 4-day average result indicates that all results were below the quantitation limit, but at least one result is a Jvalue.^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.B – Analyte was found in the blank and sample.



# 5-6 5-6Table 5-2. Field Duplicate Results –Influent to SBR System, DickersonAnalyteMethodUnitsOriginal Influentto SBRSystem, Day 3Concentration (SP-2)Duplicate Influentto SBRSystemConcentration (SP-4)AverageResultRelativePercentDifferenceClassicalsAmmonia 350.1 mg/L 2.90 3.30 3.10 12.9Nitrate Nitrite as N 353.2 mg/L 38.0 38.0 38.0 0.00Nitrogen, Total Kjeldahl 351.2 mg/L 10.0 B 11.0 B 10.5 9.52Biochemical Oxygen Demand 5210B mg/L NQ (2.50) NQ (2.50) NQ (2.50) NCChemical Oxygen Demand 410.4 mg/L 160 110 135 37.0Chloride 300.0 mg/L 6,700 6,700 6,700 0.00Sulfate 300.0 mg/L 1,700 1,800 1,750 5.71Cyanide, Total 4500 CN E mg/L 0.0450 B 0.0590 B 0.0520 26.9Total Dissolved Solids 2540C mg/L 12,000 13,000 12,500 8.00Total Suspended Solids 2540D mg/L 42.0 99.0 70.5 80.9Phosphorus, Total 365.1 mg/L 0.0500 NQ (0.0500) < 0.0375 NCTotal MetalsAluminum 200.7 ug/L 1,400 1,500 1,450 6.90Antimony 200.8 ug/L 4.50 4.70 4.60 4.35Arsenic 200.8 ug/L 4.50 5.40 4.95 18.2Barium 200.7 ug/L 240 260 250 8.00Beryllium 200.7 ug/L ND (2.00) ND (2.00) ND (2.00) NCBoron 200.7 ug/L 160,000 B 160,000 B 160,000 0.00Cadmium 200.8 ug/L NQ (4.00) NQ (4.00) NQ (4.00) NCCalcium 200.7 ug/L 2,200,000 2,300,000 2,250,000 4.44Chromium 200.8 ug/L NQ (8.00) ^ NQ (8.00) ^ NQ (8.00) NCCobalt 200.7 ug/L NQ (20.0) NQ (20.0) NQ (20.0) NCCopper 200.8 ug/L 54.0 57.0 55.5 5.41Iron 200.7 ug/L 1,700 1,700 1,700 0.00< - Average result includes at least one value measured belowthe quantitation limit. (Calculation uses 1⁄2 the quantitation limit for values below the quantitation limit).* - The dissolved mercury original sample result seems erroneousbased on the Day 3 duplicate sample concentration and the other three sample days. The original sample resultwas excluded from the presentation of the Day 3 average result inTable 4-2. Additionally, 5.56ng/L (instead of 24.2 ng/L) was used in the calculation of the 4-day average resultpresented in Table 4-2 and 4-5.NC – Not calculated.ND – Not detected (number in parentheses is the quantitation limit).NQ – Analyte was measured above the method detection limit, butbelow the quantitation limit (number shown in parentheses is the quantitation limit). The analytical result ispresented in Appendix A with a J flag designation. A “NQ” for the 4-day average result indicates that all results were below the quantitation limit, but at least one result is a Jvalue.^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.B – Analyte was found in the blank and sample.



# 5-7 5-7Table 5-2. Field Duplicate Results –Influent to SBR System, DickersonAnalyteMethodUnitsOriginal Influentto SBRSystem, Day 3Concentration (SP-2)Duplicate Influentto SBRSystemConcentration (SP-4)AverageResultRelativePercentDifferenceLead 200.8 ug/L 3.50 3.80 3.65 8.22Magnesium 200.7 ug/L 1,200,000 1,200,000 1,200,000 0.00Manganese 200.7 ug/L 260 270 265 3.77Mercury 1631E ng/L 454 437 446 3.82Molybdenum 200.7 ug/L 240 250 245 4.08Nickel 200.8 ug/L 52.0 49.0 50.5 5.94Selenium 200.8 ug/L 110 100 105 9.52Silver 200.8 ug/L ND (2.00) ND (2.00) ND (2.00) NCSodium 200.7 ug/L 180,000 190,000 185,000 5.41Thallium 200.8 ug/L NQ (2.00) NQ (2.00) NQ (2.00) NCTin 200.7 ug/L ND (200) ND (200) ND (200) NCTitanium 200.7 ug/L 99.0 100 99.5 1.01Vanadium 200.8 ug/L 10.0 11.0 10.5 9.52Zinc 200.7 ug/L 53.0 53.0 53.0 0.00Dissolved MetalsAluminum 200.7 ug/L NQ (200) NQ (200) NQ (200) NCAntimony 200.8 ug/L 3.60 3.60 3.60 0.00Arsenic 200.8 ug/L NQ (4.00) NQ (4.00) NQ (4.00) NCBarium 200.7 ug/L 190 190 190 0.00Beryllium 200.7 ug/L ND (2.00) ND (2.00) ND (2.00) NCBoron 200.7 ug/L 160,000 B 160,000 B 160,000 0.00Cadmium 200.8 ug/L NQ (4.00) NQ (4.00) NQ (4.00) NCCalcium 200.7 ug/L 2,300,000 2,300,000 2,300,000 0.00Chromium 200.8 ug/L ND (8.00) ^ ND (8.00) ^ ND (8.00) NCChromium (VI) 218.6 ug/L ND (10.0) ND (10.0) ND (10.0) NC< - Average result includes at least one value measured belowthe quantitation limit. (Calculation uses 1⁄2 the quantitation limit for values below the quantitation limit).* - The dissolved mercury original sample result seems erroneousbased on the Day 3 duplicate sample concentration and the other three sample days. The original sample resultwas excluded from the presentation of the Day 3 average result inTable 4-2. Additionally, 5.56ng/L (instead of 24.2 ng/L) was used in the calculation of the 4-day average resultpresented in Table 4-2 and 4-5.NC – Not calculated.ND – Not detected (number in parentheses is the quantitation limit).NQ – Analyte was measured above the method detection limit, butbelow the quantitation limit (number shown in parentheses is the quantitation limit). The analytical result ispresented in Appendix A with a J flag designation. A “NQ” for the 4-day average result indicates that all results were below the quantitation limit, but at least one result is a Jvalue.^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.B – Analyte was found in the blank and sample.



# 5-8 5-8Table 5-2. Field Duplicate Results –Influent to SBR System, DickersonAnalyteMethodUnitsOriginal Influentto SBRSystem, Day 3Concentration (SP-2)Duplicate Influentto SBRSystemConcentration (SP-4)AverageResultRelativePercentDifferenceCobalt 200.7 ug/L NQ (20.0) NQ (20.0) NQ (20.0) NCCopper 200.8 ug/L 44.0 46.0 45.0 4.44Iron 200.7 ug/L ND (200) ND (200) ND (200) NCLead 200.8 ug/L ND (2.00) ND (2.00) ND (2.00) NCMagnesium 200.7 ug/L 1,200,000 1,200,000 1,200,000 0.00Manganese 200.7 ug/L 210 210 210 0.00Mercury 1631E ng/L 42.8* 5.56 24.2* 154Molybdenum 200.7 ug/L 240 240 240 0.00Nickel 200.8 ug/L 49.0 50.0 49.5 2.02Selenium 200.8 ug/L 94.0 100 97.0 6.19Silver 200.8 ug/L ND (2.00) ND (2.00) ND (2.00) NCSodium 200.7 ug/L 180,000 180,000 180,000 0.00Thallium 200.8 ug/L NQ (2.00) NQ (2.00) NQ (2.00) NCTin 200.7 ug/L ND (200) ND (200) ND (200) NCTitanium 200.7 ug/L NQ (20.0) NQ (20.0) NQ (20.0) NCVanadium 200.8 ug/L NQ (10.0) NQ (10.0) NQ (10.0) NCZinc 200.7 ug/L NQ (40.0) NQ (40.0) NQ (40.0) NC< - Average result includes at least one value measured belowthe quantitation limit. (Calculation uses 1⁄2 the quantitation limit for values below the quantitation limit).NC – Not calculated.ND – Not detected (number in parentheses is the quantitation limit).NQ – Analyte was measured above the method detection limit, butbelow the quantitation limit (number shown in parentheses is the quantitation limit). The analytical result ispresented in Appendix A with a J flag designation. A “NQ” for the 4-day average result indicates that all results were below the quantitation limit, but at least one result is a Jvalue.^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.B – Analyte was found in the blank and sample.D – Laboratory duplicate RPD greater than method-specified criteria.



# 5-9Table 5-3. Field Duplicate Results –Effluent from SBR System, DickersonAnalyteMethodUnitsOriginal Effluentfrom SBRSystem, Day 2Concentration (SP-3)Duplicate Effluentfrom SBRSystemConcentration (SP-5)AverageResultRelativePercentDifferenceClassicalsAmmonia350.1mg/LNQ (1.00)NQ (1.00)NQ (1.00)NCNitrate Nitrite as N353.2mg/L0.1100.1100.1100.00Nitrogen, Total Kjeldahl351.2mg/L13.0B13.0B13.00.00Biochemical Oxygen Demand5210Bmg/L4.704.704.700.00Chemical Oxygen Demand410.4mg/L1901801855.41Chloride300.0mg/L8,2007,8008,0005.00Sulfate300.0mg/L1,7001,7001,7000.00Cyanide, Total4500 CN Emg/LNQ (0.0100)BNQ (0.0100)BNQ (0.0100)NCTotal Dissolved Solids2540Cmg/L14,00013,00013,5007.41Total Suspended Solids2540Dmg/L16.012.0D14.028.6Phosphorus, Total365.1mg/LNQ (0.0500)NQ (0.0500)NQ (0.0500)NCTotal MetalsAluminum200.7ug/L7207007102.82Antimony200.8ug/L5.705.305.507.27Arsenic200.8ug/LNQ (4.00)NQ (4.00)NQ (4.00)NCBarium200.7ug/L3103003053.28Beryllium200.7ug/LND (2.00)ND (2.00)ND (2.00)NCBoron200.7ug/L190,000B180,000B185,0005.41Cadmium200.8ug/LNQ (4.00)NQ (4.00)NQ (4.00)NCCalcium200.7ug/L2,800,0002,700,0002,750,0003.64Chromium200.8ug/LND (8.00)^ND (8.00)^ND (8.00)NCCobalt200.7ug/LNQ (20.0)NQ (20.0)NQ (20.0)NCCopper200.8ug/L22.022.022.00.00< - Average result includes at least one value measured belowthe quantitation limit. (Calculation uses 1⁄2 the quantitation limit for values below the quantitation limit).NC – Not calculated.ND – Not detected (number in parentheses is the quantitation limit).NQ – Analyte was measured above the method detection limit, butbelow the quantitation limit (number shown in parentheses is the quantitation limit). The analytical result ispresented in Appendix A with a J flag designation. A “NQ” for the 4-day average result indicates that all results were below the quantitation limit, but at least one result is a Jvalue.^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.B – Analyte was found in the blank and sample.D – Laboratory duplicate RPD greater than method-specified criteria.



# 5-10Table 5-3. Field Duplicate Results –Effluent from SBR System, DickersonAnalyteMethodUnitsOriginal Effluentfrom SBRSystem, Day 2Concentration (SP-3)Duplicate Effluentfrom SBRSystemConcentration (SP-5)AverageResultRelativePercentDifferenceIron200.7ug/LNQ (200)NQ (200)NQ (200)NCLead200.8ug/LNQ (2.00)NQ (2.00)NQ (2.00)NCMagnesium200.7ug/L1,300,0001,200,0001,250,0008.00Manganese200.7ug/L86.083.084.53.55Mercury1631Eng/L13.06.309.6569.4Molybdenum200.7ug/L3203103153.17Nickel200.8ug/L64.064.064.00.00Selenium200.8ug/L1101101100.00Silver200.8ug/LND (2.00)ND (2.00)ND (2.00)NCSodium200.7ug/L230,000220,000225,0004.44Thallium200.8ug/LNQ (2.00)NQ (2.00)NQ (2.00)NCTin200.7ug/LND (200)ND (200)ND (200)NCTitanium200.7ug/LNQ (20.0)NQ (20.0)NQ (20.0)NCVanadium200.8ug/LNQ (10.0)NQ (10.0)NQ (10.0)NCZinc200.7ug/L42.043.042.52.35Dissolved MetalsAluminum200.7ug/LNQ (200)NQ (200)NQ (200)NCAntimony200.8ug/L5.404.805.1011.8Arsenic200.8ug/LNQ (4.00)NQ (4.00)NQ (4.00)NCBarium200.7ug/L3003003000.00Beryllium200.7ug/LND (2.00)ND (2.00)ND (2.00)NCBoron200.7ug/L180,000B180,000B180,0000.00Cadmium200.8ug/LNQ (4.00)NQ (4.00)NQ (4.00)NCCalcium200.7ug/L2,800,0002,700,0002,750,0003.64< - Average result includes at least one value measured belowthe quantitation limit. (Calculation uses 1⁄2 the quantitation limit for values below the quantitation limit).NC – Not calculated.ND – Not detected (number in parentheses is the quantitation limit).NQ – Analyte was measured above the method detection limit, butbelow the quantitation limit (number shown in parentheses is the quantitation limit). The analytical result ispresented in Appendix A with a J flag designation. A “NQ” for the 4-day average result indicates that all results were below the quantitation limit, but at least one result is a Jvalue.^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.B – Analyte was found in the blank and sample.D – Laboratory duplicate RPD greater than method-specified criteria.



# 5-11Table 5-3. Field Duplicate Results –Effluent from SBR System, DickersonAnalyteMethodUnitsOriginal Effluentfrom SBRSystem, Day 2Concentration (SP-3)Duplicate Effluentfrom SBRSystemConcentration (SP-5)AverageResultRelativePercentDifferenceChromium200.8ug/LND (8.00)^ND (8.00)^ND (8.00)NCChromium (VI)218.6ug/LND (10.0)ND (10.0)ND (10.0)NCCobalt200.7ug/LNQ (20.0)NQ (20.0)NQ (20.0)NCCopper200.8ug/L17.018.017.55.71Iron200.7ug/LNQ (200)NQ (200)NQ (200)NCLead200.8ug/LNQ (2.00)NQ (2.00)NQ (2.00)NCMagnesium200.7ug/L1,300,0001,300,0001,300,0000.00Manganese200.7ug/L86.084.085.02.35Mercury1631Eng/L6.522.034.28105Molybdenum200.7ug/L3203103153.17Nickel200.8ug/L67.066.066.51.50Selenium200.8ug/L1001101059.52Silver200.8ug/LND (2.00)ND (2.00)ND (2.00)NCSodium200.7ug/L220,000220,000220,0000.00Thallium200.8ug/LNQ (2.00)NQ (2.00)NQ (2.00)NCTin200.7ug/LND (200)ND (200)ND (200)NCTitanium200.7ug/LNQ (20.0)NQ (20.0)NQ (20.0)NCVanadium200.8ug/LNQ (10.0)NQ (10.0)NQ (10.0)NCZinc200.7ug/L42.0NQ (40.0)< 31.0NC1.Eastern Research Group, Inc., 2010.FinalSampling Plan, Mirant Mid-Atlantic, LLC’sDickerson Generating Station.August 19. DCN SE00503.2.Eastern Research Group, Inc., 2010.Quality Assurance Project Plan for the SteamElectric Effluent Guidelines Rulemaking. (October). DCN SE00058.Appendix AANALYTICAL RESULTS

# A-1ND – Not detected (number in parentheses is the quantitation limit).^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.B – Analyte was found in the blank and sample.C – pH upon receipt was less than 10 S.U.L – LFB or LCS percent recovery not within method-specified criteria, but iswithin laboratory-specified criteria.J – Result measured above the MDL, but less than the quantitation limit.U – Result below the MDL. (Number shown in parentheses is the quantitation limit)Table A-1. Influent to FGD Wastewater TreatmentSystem, Day 1 Analytical Results, DickersonAnalyteMethodUnitsDilutionValueSampleSpecific MDLSample-Specific QLConcentrationClassicalsAmmonia350.1mg/L10.1115.9Nitrate Nitrite as N353.2mg/L100.19167Nitrogen, Total Kjeldahl351.2mg/L11.520130LBiochemical Oxygen Demand5210Bmg/L10.32.52JChemical Oxygen Demand410.4mg/L28.140110Chloride300.0mg/L5001301,5009,200Sulfate300.0mg/L100235001,800Cyanide, Total4500 CN Emg/L40.0080.041.2CTotal Dissolved Solids2540Cmg/L14701,000170,000BTotal Suspended Solids2540Dmg/L111403,900Phosphorus, Total365.1mg/L50.0250.253.7Total MetalsAluminum200.7ug/L29.4200130,000Antimony200.8ug/L20.72223Arsenic200.8ug/L106.120280Barium200.7ug/L22.520700Beryllium200.7ug/L20.71215Boron200.7ug/L501705,000220,000BCadmium200.8ug/L21.2431Calcium200.7ug/L501,70010,0002,900,000Chromium200.8ug/L101640690^Cobalt200.7ug/L21.120130Copper200.8ug/L104.820660Iron200.7ug/L508005,000180,000Lead200.8ug/L103.610220Magnesium200.7ug/L5054010,0001,700,000

# A-2ND – Not detected (number in parentheses is the quantitation limit).^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.B – Analyte was found in the blank and sample.C – pH upon receipt was less than 10 S.U.L – LFB or LCS percent recovery not within method-specified criteria, but iswithin laboratory-specified criteria.J – Result measured above the MDL, but less than the quantitation limit.U – Result below the MDL. (Number shown in parentheses is the quantitation limit)Table A-1. Influent to FGD Wastewater TreatmentSystem, Day 1 Analytical Results, DickersonAnalyteMethodUnitsDilutionValueSampleSpecific MDLSample-Specific QLConcentrationManganese200.7ug/L20.512011,000Mercury1631Eng/L5001212528,550Molybdenum200.7ug/L21.640520Nickel200.8ug/L20.894660Selenium200.8ug/L20.6241,500Silver200.8ug/L20.592ND (2)USodium200.7ug/L218010,000200,000Thallium200.8ug/L20.4721.5JTin200.7ug/L24.820037JTitanium200.7ug/L21.6206,200Vanadium200.8ug/L108.450580Zinc200.7ug/L29.1402,500Dissolved MetalsAluminum200.7ug/L29.420066JAntimony200.8ug/L20.7223.7Arsenic200.8ug/L21.242.4JBarium200.7ug/L22.520250Beryllium200.7ug/L20.712ND (2)UBoron200.7ug/L501705,000210,000BCadmium200.8ug/L21.2428Calcium200.7ug/L501,70010,0002,300,000Chromium200.8ug/L23.38ND (8)U,^Chromium (VI)218.6ug/L51.9610ND (10)UCobalt200.7ug/L21.12081Copper200.8ug/L20.96426Iron200.7ug/L23220050JLead200.8ug/L20.732ND (2)U

# A-3ND – Not detected (number in parentheses is the quantitation limit).^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.B – Analyte was found in the blank and sample.C – pH upon receipt was less than 10 S.U.L – LFB or LCS percent recovery not within method-specified criteria, but iswithin laboratory-specified criteria.J – Result measured above the MDL, but less than the quantitation limit.U – Result below the MDL. (Number shown in parentheses is the quantitation limit)Table A-1. Influent to FGD Wastewater TreatmentSystem, Day 1 Analytical Results, DickersonAnalyteMethodUnitsDilutionValueSampleSpecific MDLSample-Specific QLConcentrationMagnesium200.7ug/L5054010,0001,600,000Manganese200.7ug/L20.512011,000Mercury1631Eng/L102.415.05177Molybdenum200.7ug/L21.640250Nickel200.8ug/L20.894460Selenium200.8ug/L20.624150Silver200.8ug/L20.592ND (2)USodium200.7ug/L218010,000210,000Thallium200.8ug/L20.4722.4Tin200.7ug/L24.8200ND (200)UTitanium200.7ug/L21.620ND (20)UVanadium200.8ug/L21.7108.6JZinc200.7ug/L29.1401,300

# A-4ND – Not detected (number in parentheses is the quantitation limit).^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.B – Analyte was found in the blank and sample.J – Result measured above the MDL, but less than the quantitation limit.U – Result below the MDL. (Number shown in parentheses is the quantitation limit).Table A-2. Influent to FGD Wastewater TreatmentSystem, Day 2 Analytical Results, DickersonAnalyteMethodUnitsDilutionValueSampleSpecific MDLSample-Specific QLConcentrationClassicalsAmmonia350.1mg/L10.1115.4Nitrate Nitrite as N353.2mg/L100.19167Nitrogen, Total Kjeldahl351.2mg/L10.771023BBiochemical Oxygen Demand5210Bmg/L10.32.53.7Chemical Oxygen Demand410.4mg/L28.140150Chloride300.0mg/L5001301,5008,400Sulfate300.0mg/L100235001,800Cyanide, Total4500 CN Emg/L40.0080.041.1BTotal Dissolved Solids2540Cmg/L14710015,000Total Suspended Solids2540Dmg/L15520011,000Phosphorus, Total365.1mg/L10.0050.050.019JTotal MetalsAluminum200.7ug/L29.4200110,000Antimony200.8ug/L20.72218Arsenic200.8ug/L106.120220Barium200.7ug/L22.520720Beryllium200.7ug/L20.71212Boron200.7ug/L501705,000200,000BCadmium200.8ug/L21.2427Calcium200.7ug/L501,70010,0002,700,000Chromium200.8ug/L101640570^Cobalt200.7ug/L21.120120Copper200.8ug/L104.820530Iron200.7ug/L508005,000160,000Lead200.8ug/L20.732170Magnesium200.7ug/L5054010,0001,600,000Manganese200.7ug/L20.51209,800Mercury1631Eng/L5001212524,830

# A-5ND – Not detected (number in parentheses is the quantitation limit).^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.B – Analyte was found in the blank and sample.J – Result measured above the MDL, but less than the quantitation limit.U – Result below the MDL. (Number shown in parentheses is the quantitation limit).Table A-2. Influent to FGD Wastewater TreatmentSystem, Day 2 Analytical Results, DickersonAnalyteMethodUnitsDilutionValueSampleSpecific MDLSample-Specific QLConcentrationMolybdenum200.7ug/L21.640440Nickel200.8ug/L20.894580Selenium200.8ug/L20.6241,200Silver200.8ug/L20.592ND (2)USodium200.7ug/L218010,000190,000Thallium200.8ug/L20.4721.1JTin200.7ug/L24.820032JTitanium200.7ug/L21.6205,400Vanadium200.8ug/L108.450470Zinc200.7ug/L29.1402,000Dissolved MetalsAluminum200.7ug/L29.420037JAntimony200.8ug/L20.7223.8Arsenic200.8ug/L21.243.1JBarium200.7ug/L22.520210Beryllium200.7ug/L20.712ND (2)UBoron200.7ug/L501705,000190,000BCadmium200.8ug/L21.2424Calcium200.7ug/L501,70010,0002,100,000Chromium200.8ug/L23.38ND (8)U,^Chromium (VI)218.6ug/L51.9610ND (10)UCobalt200.7ug/L21.12077Copper200.8ug/L20.96412Iron200.7ug/L23220038JLead200.8ug/L20.732ND (2)UMagnesium200.7ug/L5054010,0001,500,000Manganese200.7ug/L20.512010,000Mercury1631Eng/L102.415.0549.7Molybdenum200.7ug/L21.640210

# A-6ND – Not detected (number in parentheses is the quantitation limit).^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.B – Analyte was found in the blank and sample.J – Result measured above the MDL, but less than the quantitation limit.U – Result below the MDL. (Number shown in parentheses is the quantitation limit).Table A-2. Influent to FGD Wastewater TreatmentSystem, Day 2 Analytical Results, DickersonAnalyteMethodUnitsDilutionValueSampleSpecific MDLSample-Specific QLConcentrationNickel200.8ug/L20.894420Selenium200.8ug/L20.624210Silver200.8ug/L20.592ND (2)USodium200.7ug/L218010,000200,000Thallium200.8ug/L20.4721.2JTin200.7ug/L24.8200ND (200)UTitanium200.7ug/L21.620ND (20)UVanadium200.8ug/L21.7108.3JZinc200.7ug/L29.140700

# A-7ND – Not detected (number in parentheses is the quantitation limit).^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.B – Analyte was found in the blank and sample.J – Result measured above the MDL, but less than the quantitation limit.U – Result below the MDL. (Number shown in parentheses is the quantitation limit).Table A-3. Influent to FGD Wastewater TreatmentSystem, Day 3 Analytical Results, DickersonAnalyteMethodUnitsDilutionValueSampleSpecific MDLSample-Specific QLConcentrationClassicalsAmmonia350.1mg/L10.05514Nitrate Nitrite as N353.2mg/L100.19147Nitrogen, Total Kjeldahl351.2mg/L10.771012BBiochemical Oxygen Demand5210Bmg/L10.32.56.3Chemical Oxygen Demand410.4mg/L28.140110Chloride300.0mg/L200516005,700Sulfate300.0mg/L50122501,700Cyanide, Total4500 CN Emg/L40.0080.040.74Total Dissolved Solids2540Cmg/L14710012,000Total Suspended Solids2540Dmg/L1281003,900Phosphorus, Total365.1mg/L50.0250.253.2Total MetalsAluminum200.7ug/L29.420091,000Antimony200.8ug/L20.72215Arsenic200.8ug/L21.24190Barium200.7ug/L22.520590Beryllium200.7ug/L20.71210Boron200.7ug/L501705,000150,000BCadmium200.8ug/L21.2421Calcium200.7ug/L501,70010,0002,600,000Chromium200.8ug/L101640450^Cobalt200.7ug/L21.12099Copper200.8ug/L104.820440Iron200.7ug/L508005,000130,000Lead200.8ug/L20.732140Magnesium200.7ug/L5054010,0001,200,000Manganese200.7ug/L20.51207,800Mercury1631Eng/L5001212524,030

# A-8ND – Not detected (number in parentheses is the quantitation limit).^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.B – Analyte was found in the blank and sample.J – Result measured above the MDL, but less than the quantitation limit.U – Result below the MDL. (Number shown in parentheses is the quantitation limit).Table A-3. Influent to FGD Wastewater TreatmentSystem, Day 3 Analytical Results, DickersonAnalyteMethodUnitsDilutionValueSampleSpecific MDLSample-Specific QLConcentrationMolybdenum200.7ug/L21.640360Nickel200.8ug/L20.894450Selenium200.8ug/L20.624920Silver200.8ug/L20.592ND (2)USodium200.7ug/L218010,000160,000Thallium200.8ug/L20.4722.9Tin200.7ug/L24.820026JTitanium200.7ug/L21.6204,500Vanadium200.8ug/L108.450390Zinc200.7ug/L29.1401,500Dissolved MetalsAluminum200.7ug/L29.420070JAntimony200.8ug/L20.7222.8Arsenic200.8ug/L21.241.9JBarium200.7ug/L22.520130Beryllium200.7ug/L20.712ND (2)UBoron200.7ug/L501705,000150,000BCadmium200.8ug/L21.2417Calcium200.7ug/L2694001,600,000Chromium200.8ug/L23.38ND (8)U,^Chromium (VI)218.6ug/L51.9610ND (10)UCobalt200.7ug/L21.12058Copper200.8ug/L20.9648.3Iron200.7ug/L23220059JLead200.8ug/L20.732ND (2)UMagnesium200.7ug/L5054010,0001,200,000Manganese200.7ug/L20.51208,100Mercury1631Eng/L204.8310.1193Molybdenum200.7ug/L21.640180

# A-9ND – Not detected (number in parentheses is the quantitation limit).^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.B – Analyte was found in the blank and sample.J – Result measured above the MDL, but less than the quantitation limit.U – Result below the MDL. (Number shown in parentheses is the quantitation limit).Table A-3. Influent to FGD Wastewater TreatmentSystem, Day 3 Analytical Results, DickersonAnalyteMethodUnitsDilutionValueSampleSpecific MDLSample-Specific QLConcentrationNickel200.8ug/L20.894310Selenium200.8ug/L20.624150Silver200.8ug/L20.592ND (2)USodium200.7ug/L218010,000160,000Thallium200.8ug/L20.4720.93JTin200.7ug/L24.8200ND (200)UTitanium200.7ug/L21.620ND (20)UVanadium200.8ug/L21.7107.8JZinc200.7ug/L29.140370

# A-10ND – Not detected (number in parentheses is the quantitation limit).^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.B – Analyte was found in the blank and sample.D – Laboratory duplicate RPD greater than method-specified criteria.J – Result measured above the MDL, but less than the quantitation limit.U – Result below the MDL. (Number shown in parentheses is the quantitation limit).Table A-4. Influent to FGD Wastewater TreatmentSystem, Day 4 Analytical Results, DickersonAnalyteMethodUnitsDilutionValueSampleSpecific MDLSample-Specific QLConcentrationClassicalsAmmonia350.1mg/L10.05514.9Nitrate Nitrite as N353.2mg/L100.19162Nitrogen, Total Kjeldahl351.2mg/L10.771021BBiochemical Oxygen Demand5210Bmg/L10.5958Chemical Oxygen Demand410.4mg/L28.140150Chloride300.0mg/L200516007,400Sulfate300.0mg/L50122501,800Cyanide, Total4500 CN Emg/L40.0080.040.76BTotal Dissolved Solids2540Cmg/L14710011,000DTotal Suspended Solids2540Dmg/L118673,700Phosphorus, Total365.1mg/L50.0250.254.3Total MetalsAluminum200.7ug/L29.4200110,000Antimony200.8ug/L20.72219Arsenic200.8ug/L106.120230Barium200.7ug/L22.520790Beryllium200.7ug/L20.71213Boron200.7ug/L501705,000200,000BCadmium200.8ug/L21.2427Calcium200.7ug/L501,70010,0002,600,000Chromium200.8ug/L101640570^Cobalt200.7ug/L21.120120Copper200.8ug/L104.820540Iron200.7ug/L508005,000160,000Lead200.8ug/L20.732180Magnesium200.7ug/L5054010,0001,600,000Manganese200.7ug/L20.51209,900

# A-11ND – Not detected (number in parentheses is the quantitation limit).^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.B – Analyte was found in the blank and sample.D – Laboratory duplicate RPD greater than method-specified criteria.J – Result measured above the MDL, but less than the quantitation limit.U – Result below the MDL. (Number shown in parentheses is the quantitation limit).Table A-4. Influent to FGD Wastewater TreatmentSystem, Day 4 Analytical Results, DickersonAnalyteMethodUnitsDilutionValueSampleSpecific MDLSample-Specific QLConcentrationMercury1631Eng/L5001212525,630Molybdenum200.7ug/L21.640440Nickel200.8ug/L20.894570Selenium200.8ug/L20.6241,200Silver200.8ug/L20.592ND (2)USodium200.7ug/L218010,000190,000Thallium200.8ug/L20.4721.8JTin200.7ug/L24.820033JTitanium200.7ug/L21.6205,600Vanadium200.8ug/L108.450490Zinc200.7ug/L29.1402,000Dissolved MetalsAluminum200.7ug/L29.420061JAntimony200.8ug/L20.7223.5Arsenic200.8ug/L21.242.2JBarium200.7ug/L22.520140Beryllium200.7ug/L20.712ND (2)UBoron200.7ug/L501705,000200,000BCadmium200.8ug/L21.2422Calcium200.7ug/L501,70010,0002,100,000Chromium200.8ug/L23.38ND (8)U,^Chromium (VI)218.6ug/L51.9610ND (10)UCobalt200.7ug/L21.12071Copper200.8ug/L20.9649.2Iron200.7ug/L23220046JLead200.8ug/L20.732ND (2)UMagnesium200.7ug/L5054010,0001,500,000Manganese200.7ug/L20.512010,000

# A-12ND – Not detected (number in parentheses is the quantitation limit).^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.B – Analyte was found in the blank and sample.D – Laboratory duplicate RPD greater than method-specified criteria.J – Result measured above the MDL, but less than the quantitation limit.U – Result below the MDL. (Number shown in parentheses is the quantitation limit).Table A-4. Influent to FGD Wastewater TreatmentSystem, Day 4 Analytical Results, DickersonAnalyteMethodUnitsDilutionValueSampleSpecific MDLSample-Specific QLConcentrationMercury1631Eng/L204.8310.124.4Molybdenum200.7ug/L21.640220Nickel200.8ug/L20.894380Selenium200.8ug/L20.624180Silver200.8ug/L20.592ND (2)USodium200.7ug/L218010,000200,000Thallium200.8ug/L20.4721.3JTin200.7ug/L24.8200ND (200)UTitanium200.7ug/L21.620ND (20)UVanadium200.8ug/L21.7109JZinc200.7ug/L29.140450

# A-13ND – Not detected (number in parentheses is the quantitation limit).^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.B – Analyte was found in the blank and sample.J – Result measured above the MDL, but less than the quantitation limit.U – Result below the MDL. (Number shown in parentheses is the quantitation limit).Table A-5. Influent to SBR System,Day 1 Analytical Results, DickersonAnalyteMethodUnitsDilutionValueSampleSpecific MDLSample-Specific QLConcentrationClassicalsAmmonia350.1mg/L10.1114.4Nitrate Nitrite as N353.2mg/L100.19148Nitrogen, Total Kjeldahl351.2mg/L10.771010BBiochemical Oxygen Demand5210Bmg/L10.32.54Chemical Oxygen Demand410.4mg/L28.140160Chloride300.0mg/L5001301,5008,600Sulfate300.0mg/L100235001,800Cyanide, Total4500 CN Emg/L10.0020.010.22BTotal Dissolved Solids2540Cmg/L14710014,000Total Suspended Solids2540Dmg/L11.1438Phosphorus, Total365.1mg/L10.0050.050.023JTotal MetalsAluminum200.7ug/L29.4200600Antimony200.8ug/L20.7225.5Arsenic200.8ug/L21.243.6JBarium200.7ug/L22.520300Beryllium200.7ug/L20.712ND (2)UBoron200.7ug/L501705,000170,000BCadmium200.8ug/L21.243.2JCalcium200.7ug/L501,70010,0002,600,000Chromium200.8ug/L23.383.6J,^Cobalt200.7ug/L21.1203.7JCopper200.8ug/L20.96443Iron200.7ug/L232200740Lead200.8ug/L20.7322.7Magnesium200.7ug/L5054010,0001,200,000Manganese200.7ug/L20.512090Mercury1631Eng/L102.415.05222

# A-14ND – Not detected (number in parentheses is the quantitation limit).^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.B – Analyte was found in the blank and sample.J – Result measured above the MDL, but less than the quantitation limit.U – Result below the MDL. (Number shown in parentheses is the quantitation limit).Table A-5. Influent to SBR System,Day 1 Analytical Results, DickersonAnalyteMethodUnitsDilutionValueSampleSpecific MDLSample-Specific QLConcentrationMolybdenum200.7ug/L21.640300Nickel200.8ug/L20.89460Selenium200.8ug/L20.624130Silver200.8ug/L20.592ND (2)USodium200.7ug/L218010,000200,000Thallium200.8ug/L20.4721.2JTin200.7ug/L24.8200ND (200)UTitanium200.7ug/L21.62046Vanadium200.8ug/L21.7107.4JZinc200.7ug/L29.14033JDissolved MetalsAluminum200.7ug/L29.4200ND (200)UAntimony200.8ug/L20.7224.8Arsenic200.8ug/L21.242.2JBarium200.7ug/L22.520280Beryllium200.7ug/L20.712ND (2)UBoron200.7ug/L501705,000180,000BCadmium200.8ug/L21.242.7JCalcium200.7ug/L501,70010,0002,600,000Chromium200.8ug/L23.38ND (8)U,^Chromium (VI)218.6ug/L51.9610ND (10)UCobalt200.7ug/L21.1203.1JCopper200.8ug/L20.96440Iron200.7ug/L232200ND (200)ULead200.8ug/L20.7321.1JMagnesium200.7ug/L5054010,0001,200,000Manganese200.7ug/L20.512070Mercury1631Eng/L10.240.55.97Molybdenum200.7ug/L21.640290

# A-15ND – Not detected (number in parentheses is the quantitation limit).^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.B – Analyte was found in the blank and sample.J – Result measured above the MDL, but less than the quantitation limit.U – Result below the MDL. (Number shown in parentheses is the quantitation limit).Table A-5. Influent to SBR System,Day 1 Analytical Results, DickersonAnalyteMethodUnitsDilutionValueSampleSpecific MDLSample-Specific QLConcentrationNickel200.8ug/L20.89454Selenium200.8ug/L20.624120Silver200.8ug/L20.592ND (2)USodium200.7ug/L218010,000190,000Thallium200.8ug/L20.4721.3JTin200.7ug/L24.8200ND (200)UTitanium200.7ug/L21.6203.5JVanadium200.8ug/L21.7104.9JZinc200.7ug/L29.14029J

# A-16ND – Not detected (number in parentheses is the quantitation limit).^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.B – Analyte was found in the blank and sample.J – Result measured above the MDL, but less than the quantitation limit.U – Result below the MDL. (Number shown in parentheses is the quantitation limit).Table A-6. Influent to SBR System,Day 2 Analytical Results, DickersonAnalyteMethodUnitsDilution ValueSample-SpecificMDLSample-SpecificQLConcentrationClassicalsAmmonia 350.1 mg/L 1 0.055 1 4.1Nitrate Nitrite as N 353.2 mg/L 10 0.19 1 43Nitrogen, Kjeldahl 351.2 mg/L 1 0.77 10 7.5 J,BBiochemical Oxygen Demand 5210B mg/L 1 0.3 2.5 3Chemical Oxygen Demand 410.4 mg/L 2 8.1 40 81Chloride 300.0 mg/L 200 51 600 7,800Sulfate 300.0 mg/L 50 12 250 1,600Cyanide, Total 4500 CN E mg/L 1 0.002 0.01 0.13 BTotal Dissolved Solids 2540C mg/L 1 47 100 14,000Total Suspended Solids 2540D mg/L 1 1.1 4 37Phosphorus, Total 365.1 mg/L 1 0.005 0.05 0.023 JTotal MetalsAluminum 200.7 ug/L 2 9.4 200 450Antimony 200.8 ug/L 2 0.72 2 4.4Arsenic 200.8 ug/L 2 1.2 4 3.3 JBarium 200.7 ug/L 2 2.5 20 260Beryllium 200.7 ug/L 2 0.71 2 ND (2) UBoron 200.7 ug/L 50 170 5,000 170,000 BCadmium 200.8 ug/L 2 1.2 4 2 JCalcium 200.7 ug/L 50 1,700 10,000 2,400,000Chromium 200.8 ug/L 2 3.3 8 3.6 J,^Cobalt 200.7 ug/L 2 1.1 20 3.2 JCopper 200.8 ug/L 2 0.96 4 46

# A-17ND – Not detected (number in parentheses is the quantitation limit).^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.B – Analyte was found in the blank and sample.J – Result measured above the MDL, but less than the quantitation limit.U – Result below the MDL. (Number shown in parentheses is the quantitation limit).Table A-6. Influent to SBR System,Day 2 Analytical Results, DickersonAnalyteMethodUnitsDilution ValueSample-SpecificMDLSample-SpecificQLConcentrationIron 200.7 ug/L 2 32 200 570Lead 200.8 ug/L 2 0.73 2 1.8 JMagnesium 200.7 ug/L 50 540 10,000 1,200,000Manganese 200.7 ug/L 2 0.51 20 110Mercury 1631E ng/L 100 24.1 50.5 200Molybdenum 200.7 ug/L 2 1.6 40 260Nickel 200.8 ug/L 2 0.89 4 51Selenium 200.8 ug/L 2 0.62 4 110Silver 200.8 ug/L 2 0.59 2 ND (2) USodium 200.7 ug/L 2 180 10,000 200,000Thallium 200.8 ug/L 2 0.47 2 1 JTin 200.7 ug/L 2 4.8 200 ND (200) UTitanium 200.7 ug/L 2 1.6 20 35Vanadium 200.8 ug/L 2 1.7 10 7.1 JZinc 200.7 ug/L 2 9.1 40 32 JDissolved MetalsAluminum 200.7 ug/L 2 9.4 200 13 JAntimony 200.8 ug/L 2 0.72 2 4.8Arsenic 200.8 ug/L 2 1.2 4 2.6 JBarium 200.7 ug/L 2 2.5 20 250Beryllium 200.7 ug/L 2 0.71 2 ND (2) UBoron 200.7 ug/L 50 170 5,000 170,000 BCadmium 200.8 ug/L 2 1.2 4 2.9 JCalcium 200.7 ug/L 50 1,700 10,000 2,500,000

# A-18ND – Not detected (number in parentheses is the quantitation limit).^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.B – Analyte was found in the blank and sample.J – Result measured above the MDL, but less than the quantitation limit.U – Result below the MDL. (Number shown in parentheses is the quantitation limit).Table A-6. Influent to SBR System,Day 2 Analytical Results, DickersonAnalyteMethodUnitsDilution ValueSample-SpecificMDLSample-SpecificQLConcentrationChromium 200.8 ug/L 2 3.3 8 ND (8) U,^Chromium (VI) 218.6 ug/L 5 1.96 10 ND (10) UCobalt 200.7 ug/L 2 1.1 20 3.6 JCopper 200.8 ug/L 2 0.96 4 45Iron 200.7 ug/L 2 32 200 ND (200) ULead 200.8 ug/L 2 0.73 2 0.8 JMagnesium 200.7 ug/L 50 540 10,000 1,300,000Manganese 200.7 ug/L 2 0.51 20 100Mercury 1631E ng/L 4 0.97 2.02 6.78Molybdenum 200.7 ug/L 2 1.6 40 260Nickel 200.8 ug/L 2 0.89 4 51Selenium 200.8 ug/L 2 0.62 4 110Silver 200.8 ug/L 2 0.59 2 ND (2) USodium 200.7 ug/L 2 180 10,000 190,000Thallium 200.8 ug/L 2 0.47 2 0.9 JTin 200.7 ug/L 2 4.8 200 ND (200) UTitanium 200.7 ug/L 2 1.6 20 4.3 JVanadium 200.8 ug/L 2 1.7 10 5.3 JZinc 200.7 ug/L 2 9.1 40 26 J

# A-19ND – Not detected (number in parentheses is the quantitation limit).^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.B – Analyte was found in the blank and sample.J – Result measured above the MDL, but less than the quantitation limit.U – Result below the MDL. (Number shown in parentheses is the quantitation limit).Table A-7. Influent to SBR System,Day 3 Analytical Results, DickersonAnalyteMethodUnitsDilutionValueSampleSpecific MDLSample-Specific QLConcentrationClassicalsAmmonia350.1mg/L10.05512.9Nitrate Nitrite as N353.2mg/L100.19138Nitrogen, Total Kjeldahl351.2mg/L10.771010BBiochemical Oxygen Demand5210Bmg/L10.32.52JChemical Oxygen Demand410.4mg/L28.140160Chloride300.0mg/L200516006,700Sulfate300.0mg/L50122501,700Cyanide, Total4500 CN Emg/L10.0020.010.045BTotal Dissolved Solids2540Cmg/L1194012,000Total Suspended Solids2540Dmg/L11.1442Phosphorus, Total365.1mg/L10.0050.050.05Total MetalsAluminum200.7ug/L29.42001,400Antimony200.8ug/L20.7224.5Arsenic200.8ug/L21.244.5Barium200.7ug/L22.520240Beryllium200.7ug/L20.712ND (2)UBoron200.7ug/L501705,000160,000BCadmium200.8ug/L21.242.1JCalcium200.7ug/L501,70010,0002,200,000Chromium200.8ug/L23.386.2J,^Cobalt200.7ug/L21.1204.6JCopper200.8ug/L20.96454Iron200.7ug/L2322001,700Lead200.8ug/L20.7323.5Magnesium200.7ug/L5054010,0001,200,000Manganese200.7ug/L20.5120260Mercury1631Eng/L204.8310.1454

# A-20ND – Not detected (number in parentheses is the quantitation limit).^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.B – Analyte was found in the blank and sample.J – Result measured above the MDL, but less than the quantitation limit.U – Result below the MDL. (Number shown in parentheses is the quantitation limit).Table A-7. Influent to SBR System,Day 3 Analytical Results, DickersonAnalyteMethodUnitsDilutionValueSampleSpecific MDLSample-Specific QLConcentrationMolybdenum200.7ug/L21.640240Nickel200.8ug/L20.89452Selenium200.8ug/L20.624110Silver200.8ug/L20.592ND (2)USodium200.7ug/L218010,000180,000Thallium200.8ug/L20.4720.73JTin200.7ug/L24.8200ND (200)UTitanium200.7ug/L21.62099Vanadium200.8ug/L21.71010Zinc200.7ug/L29.14053Dissolved MetalsAluminum200.7ug/L29.420037JAntimony200.8ug/L20.7223.6Arsenic200.8ug/L21.242.2JBarium200.7ug/L22.520190Beryllium200.7ug/L20.712ND (2)UBoron200.7ug/L501705,000160,000BCadmium200.8ug/L21.242JCalcium200.7ug/L501,70010,0002,300,000Chromium200.8ug/L23.38ND (8)U,^Chromium (VI)218.6ug/L51.9610ND (10)UCobalt200.7ug/L21.1203.9JCopper200.8ug/L20.96444Iron200.7ug/L232200ND (200)ULead200.8ug/L20.732ND (2)UMagnesium200.7ug/L5054010,0001,200,000Manganese200.7ug/L20.5120210Mercury1631Eng/L102.415.0542.8Molybdenum200.7ug/L21.640240

# A-21ND – Not detected (number in parentheses is the quantitation limit).^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.B – Analyte was found in the blank and sample.J – Result measured above the MDL, but less than the quantitation limit.U – Result below the MDL. (Number shown in parentheses is the quantitation limit).Table A-7. Influent to SBR System,Day 3 Analytical Results, DickersonAnalyteMethodUnitsDilutionValueSampleSpecific MDLSample-Specific QLConcentrationNickel200.8ug/L20.89449Selenium200.8ug/L20.62494Silver200.8ug/L20.592ND (2)USodium200.7ug/L218010,000180,000Thallium200.8ug/L20.4720.93JTin200.7ug/L24.8200ND (200)UTitanium200.7ug/L21.6203JVanadium200.8ug/L21.7104.6JZinc200.7ug/L29.14035J

# A-22ND – Not detected (number in parentheses is the quantitation limit).^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.4 – MS and/or MSD did not meet laboratorycriteria, but sample concentration is fourtimes greater thanthe matrix spike amount, so control limits are not applicable.B – Analyte was found in the blank and sample.F – MS and/or MSD not within laboratory control limits.J – Result measured above the MDL, but less than the quantitation limit.U – Result below the MDL. (Number shown in parentheses is the quantitation limit).Table A-8. Influent to SBR System,Day 4 Analytical Results, DickersonAnalyteMethodUnitsDilutionValueSampleSpecific MDLSample-Specific QLConcentrationClassicalsAmmonia350.1mg/L10.05513.2Nitrate Nitrite as N353.2mg/L100.19137Nitrogen, Total Kjeldahl351.2mg/L10.77109.6J,BBiochemical Oxygen Demand5210Bmg/L10.32.52.8Chemical Oxygen Demand410.4mg/L28.140130FChloride300.0mg/L200516006,700Sulfate300.0mg/L50122501,700Cyanide, Total4500 CN Emg/L10.0020.010.05BTotal Dissolved Solids2540Cmg/L1194012,000Total Suspended Solids2540Dmg/L11.1442Phosphorus, Total365.1mg/L10.0050.050.042JTotal MetalsAluminum200.7ug/L29.42001,500Antimony200.8ug/L20.7223.9Arsenic200.8ug/L21.245.5Barium200.7ug/L22.520230Beryllium200.7ug/L20.712ND (2)UBoron200.7ug/L501705,000150,000B,4Cadmium200.8ug/L21.242.5JCalcium200.7ug/L501,70010,0002,100,0004Chromium200.8ug/L23.386.3J,^Cobalt200.7ug/L21.1204.9JCopper200.8ug/L20.96498Iron200.7ug/L2322001,800Lead200.8ug/L20.7325Magnesium200.7ug/L5054010,0001,100,0004

# A-23ND – Not detected (number in parentheses is the quantitation limit).^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.4 – MS and/or MSD did not meet laboratorycriteria, but sample concentration is fourtimes greater thanthe matrix spike amount, so control limits are not applicable.B – Analyte was found in the blank and sample.F – MS and/or MSD not within laboratory control limits.J – Result measured above the MDL, but less than the quantitation limit.U – Result below the MDL. (Number shown in parentheses is the quantitation limit).Table A-8. Influent to SBR System,Day 4 Analytical Results, DickersonAnalyteMethodUnitsDilutionValueSampleSpecific MDLSample-Specific QLConcentrationManganese200.7ug/L20.5120300Mercury1631Eng/L500121252416Molybdenum200.7ug/L21.640230Nickel200.8ug/L20.89450Selenium200.8ug/L20.624100Silver200.8ug/L20.592ND (2)U,FSodium200.7ug/L218010,000180,000Thallium200.8ug/L20.4720.73JTin200.7ug/L24.8200ND (200)UTitanium200.7ug/L21.620100Vanadium200.8ug/L21.71011Zinc200.7ug/L29.14065Dissolved MetalsAluminum200.7ug/L29.420057JAntimony200.8ug/L20.7224.1Arsenic200.8ug/L21.242.2JBarium200.7ug/L22.520170Beryllium200.7ug/L20.712ND (2)UBoron200.7ug/L501705,000160,000B,4Cadmium200.8ug/L21.241.9JCalcium200.7ug/L501,70010,0002,200,0004Chromium200.8ug/L23.38ND (8)U,^Chromium (VI)218.6ug/L51.9610ND (10)UCobalt200.7ug/L21.1203.8JCopper200.8ug/L20.96469Iron200.7ug/L232200ND (200)ULead200.8ug/L20.732ND (2)U

# A-24ND – Not detected (number in parentheses is the quantitation limit).^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.4 – MS and/or MSD did not meet laboratorycriteria, but sample concentration is fourtimes greater thanthe matrix spike amount, so control limits are not applicable.B – Analyte was found in the blank and sample.F – MS and/or MSD not within laboratory control limits.J – Result measured above the MDL, but less than the quantitation limit.U – Result below the MDL. (Number shown in parentheses is the quantitation limit).Table A-8. Influent to SBR System,Day 4 Analytical Results, DickersonAnalyteMethodUnitsDilutionValueSampleSpecific MDLSample-Specific QLConcentrationMagnesium200.7ug/L5054010,0001,200,0004Manganese200.7ug/L20.5120250Mercury1631Eng/L20.481.015.81Molybdenum200.7ug/L21.640230Nickel200.8ug/L20.89450Selenium200.8ug/L20.62495Silver200.8ug/L20.592ND (2)U,FSodium200.7ug/L218010,000180,000Thallium200.8ug/L20.4720.86JTin200.7ug/L24.8200ND (200)UTitanium200.7ug/L21.6203.3JVanadium200.8ug/L21.7104.9JZinc200.7ug/L29.14045

# A-25ND – Not detected (number in parentheses is the quantitation limit).^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.B – Analyte was found in the blank and sample.J – Result measured above the MDL, but less than the quantitation limit.U – Result below the MDL. (Number shown in parentheses is the quantitation limit).Table A-9. Effluent from SBR System,Day 1 Analytical Results, DickersonAnalyteMethodUnitsDilutionValueSampleSpecific MDLSample-Specific QLConcentrationClassicalsAmmonia350.1mg/L10.1110.2JNitrate Nitrite as N353.2mg/L10.0190.10.07JNitrogen, Total Kjeldahl351.2mg/L50.38513BBiochemical Oxygen Demand5210Bmg/L10.32.53.9Chemical Oxygen Demand410.4mg/L28.140150Chloride300.0mg/L5001301,5009,700Sulfate300.0mg/L100235001,800Cyanide, Total4500 CN Emg/L10.0020.010.1BTotal Dissolved Solids2540Cmg/L14710015,000Total Suspended Solids2540Dmg/L11.148.8Phosphorus, Total365.1mg/L10.0050.050.016JTotal MetalsAluminum200.7ug/L29.4200660Antimony200.8ug/L20.7225Arsenic200.8ug/L21.243.4JBarium200.7ug/L22.520310Beryllium200.7ug/L20.712ND (2)UBoron200.7ug/L501705,000180,000BCadmium200.8ug/L21.242.7JCalcium200.7ug/L501,70010,0002,700,000Chromium200.8ug/L23.38ND (8)U,^Cobalt200.7ug/L21.1206JCopper200.8ug/L20.96421Iron200.7ug/L232200130JLead200.8ug/L20.7321.4JMagnesium200.7ug/L5054010,0001,300,000Manganese200.7ug/L20.512081Mercury1631Eng/L102.415.057.27

# A-26ND – Not detected (number in parentheses is the quantitation limit).^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.B – Analyte was found in the blank and sample.J – Result measured above the MDL, but less than the quantitation limit.U – Result below the MDL. (Number shown in parentheses is the quantitation limit).Table A-9. Effluent from SBR System,Day 1 Analytical Results, DickersonAnalyteMethodUnitsDilutionValueSampleSpecific MDLSample-Specific QLConcentrationMolybdenum200.7ug/L21.640320Nickel200.8ug/L20.89478Selenium200.8ug/L20.624110Silver200.8ug/L20.592ND (2)USodium200.7ug/L218010,000220,000Thallium200.8ug/L20.4721.2JTin200.7ug/L24.8200ND (200)UTitanium200.7ug/L21.6205.2JVanadium200.8ug/L21.7104.1JZinc200.7ug/L29.14043Dissolved MetalsAluminum200.7ug/L29.420059JAntimony200.8ug/L20.7225.7Arsenic200.8ug/L21.243JBarium200.7ug/L22.520320Beryllium200.7ug/L20.712ND (2)UBoron200.7ug/L501705,000190,000BCadmium200.8ug/L21.242JCalcium200.7ug/L501,70010,0002,800,000Chromium200.8ug/L23.38ND (8)U,^Chromium (VI)218.6ug/L51.9610ND (10)UCobalt200.7ug/L21.1206.5JCopper200.8ug/L20.96416Iron200.7ug/L23220094JLead200.8ug/L20.7321.4JMagnesium200.7ug/L5054010,0001,300,000Manganese200.7ug/L20.512085Mercury1631Eng/L10.240.51.69Molybdenum200.7ug/L21.640330

# A-27ND – Not detected (number in parentheses is the quantitation limit).^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.B – Analyte was found in the blank and sample.J – Result measured above the MDL, but less than the quantitation limit.U – Result below the MDL. (Number shown in parentheses is the quantitation limit).Table A-9. Effluent from SBR System,Day 1 Analytical Results, DickersonAnalyteMethodUnitsDilutionValueSampleSpecific MDLSample-Specific QLConcentrationNickel200.8ug/L20.89478Selenium200.8ug/L20.624100Silver200.8ug/L20.592ND (2)USodium200.7ug/L218010,000220,000Thallium200.8ug/L20.4721.2JTin200.7ug/L24.8200ND (200)UTitanium200.7ug/L21.6204.8JVanadium200.8ug/L21.7105.6JZinc200.7ug/L29.14043

# A-28ND – Not detected (number in parentheses is the quantitation limit).^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.B – Analyte was found in the blank and sample.J – Result measured above the MDL, but less than the quantitation limit.U – Result below the MDL. (Number shown in parentheses is the quantitation limit).Table A-10. Effluent from SBR System,Day 2 Analytical Results, DickersonAnalyteMethodUnitsDilutionValueSampleSpecific MDLSample-Specific QLConcentrationClassicalsAmmonia350.1mg/L10.05510.23JNitrate Nitrite as N353.2mg/L10.0190.10.11Nitrogen, Total Kjeldahl351.2mg/L50.38513BBiochemical Oxygen Demand5210Bmg/L10.32.54.7Chemical Oxygen Demand410.4mg/L28.140190Chloride300.0mg/L200516008,200Sulfate300.0mg/L50122501,700Cyanide, Total4500 CN Emg/L10.0020.010.004J,BTotal Dissolved Solids2540Cmg/L14710014,000Total Suspended Solids2540Dmg/L11.1416Phosphorus, Total365.1mg/L10.0050.050.02JTotal MetalsAluminum200.7ug/L29.4200720Antimony200.8ug/L20.7225.7Arsenic200.8ug/L21.243.1JBarium200.7ug/L22.520310Beryllium200.7ug/L20.712ND (2)UBoron200.7ug/L501705,000190,000BCadmium200.8ug/L21.243.9JCalcium200.7ug/L501,70010,0002,800,000Chromium200.8ug/L23.38ND (8)U,^Cobalt200.7ug/L21.1204JCopper200.8ug/L20.96422Iron200.7ug/L232200130JLead200.8ug/L20.7320.91JMagnesium200.7ug/L5054010,0001,300,000Manganese200.7ug/L20.512086Mercury1631Eng/L20.481.0113

# A-29ND – Not detected (number in parentheses is the quantitation limit).^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.B – Analyte was found in the blank and sample.J – Result measured above the MDL, but less than the quantitation limit.U – Result below the MDL. (Number shown in parentheses is the quantitation limit).Table A-10. Effluent from SBR System,Day 2 Analytical Results, DickersonAnalyteMethodUnitsDilutionValueSampleSpecific MDLSample-Specific QLConcentrationMolybdenum200.7ug/L21.640320Nickel200.8ug/L20.89464Selenium200.8ug/L20.624110Silver200.8ug/L20.592ND (2)USodium200.7ug/L218010,000230,000Thallium200.8ug/L20.4721.1JTin200.7ug/L24.8200ND (200)UTitanium200.7ug/L21.6205.6JVanadium200.8ug/L21.7104.7JZinc200.7ug/L29.14042Dissolved MetalsAluminum200.7ug/L29.420046JAntimony200.8ug/L20.7225.4Arsenic200.8ug/L21.243.3JBarium200.7ug/L22.520300Beryllium200.7ug/L20.712ND (2)UBoron200.7ug/L501705,000180,000BCadmium200.8ug/L21.243.3JCalcium200.7ug/L501,70010,0002,800,000Chromium200.8ug/L23.38ND (8)U,^Chromium (VI)218.6ug/L51.9610ND (10)UCobalt200.7ug/L21.1205.1JCopper200.8ug/L20.96417Iron200.7ug/L23220064JLead200.8ug/L20.7320.94JMagnesium200.7ug/L5054010,0001,300,000Manganese200.7ug/L20.512086Mercury1631Eng/L20.481.016.52Molybdenum200.7ug/L21.640320

# A-30ND – Not detected (number in parentheses is the quantitation limit).^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.B – Analyte was found in the blank and sample.J – Result measured above the MDL, but less than the quantitation limit.U – Result below the MDL. (Number shown in parentheses is the quantitation limit).Table A-10. Effluent from SBR System,Day 2 Analytical Results, DickersonAnalyteMethodUnitsDilutionValueSampleSpecific MDLSample-Specific QLConcentrationNickel200.8ug/L20.89467Selenium200.8ug/L20.624100Silver200.8ug/L20.592ND (2)USodium200.7ug/L218010,000220,000Thallium200.8ug/L20.4721.2JTin200.7ug/L24.8200ND (200)UTitanium200.7ug/L21.6204.3JVanadium200.8ug/L21.7105.2JZinc200.7ug/L29.14042

# A-31ND – Not detected (number in parentheses is the quantitation limit).^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.4 – MS and/or MSD did not meet laboratorycriteria, but sample concentration is fourtimes greater thanthe matrix spike amount, so control limits are not applicable.B – Analyte was found in the blank and sample.F – MS and/or MSD not within laboratory control limits.J – Result measured above the MDL, but less than the quantitation limit.U – Result below the MDL. (Number shown in parentheses is the quantitation limit).Table A-11. Effluent from SBR System,Day 3 Analytical Results, DickersonAnalyteMethodUnitsDilutionValueSampleSpecific MDLSample-Specific QLConcentrationClassicalsAmmonia350.1mg/L10.05510.14JNitrate Nitrite as N353.2mg/L10.0190.10.14Nitrogen, Total Kjeldahl351.2mg/L50.38513B,4Biochemical Oxygen Demand5210Bmg/L10.32.55.7Chemical Oxygen Demand410.4mg/L28.140140FChloride300.0mg/L200516007,800Sulfate300.0mg/L50122501,700Cyanide, Total4500 CN Emg/L10.0020.010.0089J,B,FTotal Dissolved Solids2540Cmg/L1194014,000Total Suspended Solids2540Dmg/L11.148Phosphorus, Total365.1mg/L10.0050.050.015JTotal MetalsAluminum200.7ug/L29.4200870Antimony200.8ug/L20.7225.1Arsenic200.8ug/L21.243JBarium200.7ug/L22.520280Beryllium200.7ug/L20.712ND (2)UBoron200.7ug/L501705,000180,000B,4Cadmium200.8ug/L21.243JCalcium200.7ug/L501,70010,0002,700,0004Chromium200.8ug/L23.38ND (8)U,^Cobalt200.7ug/L21.1203.3JCopper200.8ug/L20.96421Iron200.7ug/L232200140JLead200.8ug/L20.7321JMagnesium200.7ug/L5054010,0001,300,0004

# A-32ND – Not detected (number in parentheses is the quantitation limit).^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.4 – MS and/or MSD did not meet laboratorycriteria, but sample concentration is fourtimes greater thanthe matrix spike amount, so control limits are not applicable.B – Analyte was found in the blank and sample.F – MS and/or MSD not within laboratory control limits.J – Result measured above the MDL, but less than the quantitation limit.U – Result below the MDL. (Number shown in parentheses is the quantitation limit).Table A-11. Effluent from SBR System,Day 3 Analytical Results, DickersonAnalyteMethodUnitsDilutionValueSampleSpecific MDLSample-Specific QLConcentrationManganese200.7ug/L20.5120100Mercury1631Eng/L10.240.510.9Molybdenum200.7ug/L21.640300Nickel200.8ug/L20.89458Selenium200.8ug/L20.624110Silver200.8ug/L20.592ND (2)U,FSodium200.7ug/L218010,000230,0004Thallium200.8ug/L20.4721.1JTin200.7ug/L24.8200ND (200)UTitanium200.7ug/L21.6205.1JVanadium200.8ug/L21.7104.8JZinc200.7ug/L29.14031JDissolved MetalsAluminum200.7ug/L29.420042JAntimony200.8ug/L20.7224.5Arsenic200.8ug/L21.243.4JBarium200.7ug/L22.520270Beryllium200.7ug/L20.712ND (2)UBoron200.7ug/L501705,000180,000B,4Cadmium200.8ug/L21.242.5JCalcium200.7ug/L501,70010,0002,700,0004Chromium200.8ug/L23.38ND (8)U,^Chromium (VI)218.6ug/L51.9610ND (10)UCobalt200.7ug/L21.1204JCopper200.8ug/L20.96413Iron200.7ug/L23220054JLead200.8ug/L20.732ND (2)U

# A-33ND – Not detected (number in parentheses is the quantitation limit).^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.4 – MS and/or MSD did not meet laboratorycriteria, but sample concentration is fourtimes greater thanthe matrix spike amount, so control limits are not applicable.B – Analyte was found in the blank and sample.F – MS and/or MSD not within laboratory control limits.J – Result measured above the MDL, but less than the quantitation limit.U – Result below the MDL. (Number shown in parentheses is the quantitation limit).Table A-11. Effluent from SBR System,Day 3 Analytical Results, DickersonAnalyteMethodUnitsDilutionValueSampleSpecific MDLSample-Specific QLConcentrationMagnesium200.7ug/L5054010,0001,300,0004Manganese200.7ug/L20.5120100Mercury1631Eng/L10.240.58.61FMolybdenum200.7ug/L21.640290Nickel200.8ug/L20.89457Selenium200.8ug/L20.62498Silver200.8ug/L20.592ND (2)U,FSodium200.7ug/L218010,000220,0004Thallium200.8ug/L20.4721JTin200.7ug/L24.8200ND (200)UTitanium200.7ug/L21.6204.5JVanadium200.8ug/L21.7105.9JZinc200.7ug/L29.14028J

# A-34ND – Not detected (number in parentheses is the quantitation limit).^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.B – Analyte was found in the blank and sample.J – Result measured above the MDL, but less than the quantitation limit.U – Result below the MDL. (Number shown in parentheses is the quantitation limit).Table A-12. Effluent from SBR System,Day 4 Analytical Results, DickersonAnalyteMethodUnitsDilutionValueSampleSpecific MDLSample-Specific QLConcentrationClassicalsAmmonia350.1mg/L10.05510.19JNitrate Nitrite as N353.2mg/L10.0190.10.15Nitrogen, Total Kjeldahl351.2mg/L50.38513BBiochemical Oxygen Demand5210Bmg/L10.32.54.5Chemical Oxygen Demand410.4mg/L14.12084Chloride300.0mg/L200516007,600Sulfate300.0mg/L50122501,700Cyanide, Total4500 CN Emg/L10.0020.010.0094J,BTotal Dissolved Solids2540Cmg/L1194013,000Total Suspended Solids2540Dmg/L11.1414Phosphorus, Total365.1mg/L10.0050.050.027JTotal MetalsAluminum200.7ug/L29.4200920Antimony200.8ug/L20.7224.6Arsenic200.8ug/L21.243.4JBarium200.7ug/L22.520230Beryllium200.7ug/L20.712ND (2)UBoron200.7ug/L501705,000170,000BCadmium200.8ug/L21.242.7JCalcium200.7ug/L501,70010,0002,400,000Chromium200.8ug/L23.38ND (8)U,^Cobalt200.7ug/L21.1203JCopper200.8ug/L20.96432Iron200.7ug/L232200130JLead200.8ug/L20.7321.1JMagnesium200.7ug/L5054010,0001,200,000Manganese200.7ug/L20.5120160Mercury1631Eng/L102.415.058.59

# A-35ND – Not detected (number in parentheses is the quantitation limit).^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.B – Analyte was found in the blank and sample.J – Result measured above the MDL, but less than the quantitation limit.U – Result below the MDL. (Number shown in parentheses is the quantitation limit).Table A-12. Effluent from SBR System,Day 4 Analytical Results, DickersonAnalyteMethodUnitsDilutionValueSampleSpecific MDLSample-Specific QLConcentrationMolybdenum200.7ug/L21.640260Nickel200.8ug/L20.89450Selenium200.8ug/L20.624100Silver200.8ug/L20.592ND (2)USodium200.7ug/L218010,000220,000Thallium200.8ug/L20.4720.88JTin200.7ug/L24.8200ND (200)UTitanium200.7ug/L21.6203.8JVanadium200.8ug/L21.7105.5JZinc200.7ug/L29.14032JDissolved MetalsAluminum200.7ug/L29.420051JAntimony200.8ug/L20.7224.8Arsenic200.8ug/L21.242.6JBarium200.7ug/L22.520230Beryllium200.7ug/L20.712ND (2)UBoron200.7ug/L501705,000170,000BCadmium200.8ug/L21.241.9JCalcium200.7ug/L501,70010,0002,400,000Chromium200.8ug/L23.38ND (8)U,^Chromium (VI)218.6ug/L51.9610ND (10)UCobalt200.7ug/L21.1203.7JCopper200.8ug/L20.96420Iron200.7ug/L23220045JLead200.8ug/L20.732ND (2)UMagnesium200.7ug/L5054010,0001,200,000Manganese200.7ug/L20.5120160Mercury1631Eng/L10.240.51.21Molybdenum200.7ug/L21.640260

# A-36ND – Not detected (number in parentheses is the quantitation limit).^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.B – Analyte was found in the blank and sample.J – Result measured above the MDL, but less than the quantitation limit.U – Result below the MDL. (Number shown in parentheses is the quantitation limit).Table A-12. Effluent from SBR System,Day 4 Analytical Results, DickersonAnalyteMethodUnitsDilutionValueSampleSpecific MDLSample-Specific QLConcentrationNickel200.8ug/L20.89451Selenium200.8ug/L20.62498Silver200.8ug/L20.592ND (2)USodium200.7ug/L218010,000210,000Thallium200.8ug/L20.4720.79JTin200.7ug/L24.8200ND (200)UTitanium200.7ug/L21.6203.8JVanadium200.8ug/L21.7105.7JZinc200.7ug/L29.14032J

# A-37ND – Not detected (number in parentheses is the quantitation limit).^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.B – Analyte was found in the blank and sample.J – Result measured above the MDL, but less than the quantitation limit.U – Result below the MDL. (Number shown in parentheses is the quantitation limit).Table A-13. Duplicate of Influent to SBR System, Day 3 Analytical Results, DickersonAnalyteMethodUnitsDilutionValueSampleSpecific MDLSample-Specific QLConcentrationClassicalsAmmonia350.1mg/L10.05513.3Nitrate Nitrite as N353.2mg/L100.19138Nitrogen, Total Kjeldahl351.2mg/L10.771011BBiochemical Oxygen Demand5210Bmg/L10.32.52.3JChemical Oxygen Demand410.4mg/L28.140110Chloride300.0mg/L200516006,700Sulfate300.0mg/L50122501,800Cyanide, Total4500 CN Emg/L10.0020.010.059BTotal Dissolved Solids2540Cmg/L1194013,000Total Suspended Solids2540Dmg/L11.1499Phosphorus, Total365.1mg/L10.0050.050.04JTotal MetalsAluminum200.7ug/L29.42001,500Antimony200.8ug/L20.7224.7Arsenic200.8ug/L21.245.4Barium200.7ug/L22.520260Beryllium200.7ug/L20.712ND (2)UBoron200.7ug/L501705,000160,000BCadmium200.8ug/L21.242.8JCalcium200.7ug/L501,70010,0002,300,000Chromium200.8ug/L23.386.5J,^Cobalt200.7ug/L21.1204.6JCopper200.8ug/L20.96457Iron200.7ug/L2322001,700Lead200.8ug/L20.7323.8Magnesium200.7ug/L5054010,0001,200,000Manganese200.7ug/L20.5120270Mercury1631Eng/L204.8310.1437

# A-38ND – Not detected (number in parentheses is the quantitation limit).^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.B – Analyte was found in the blank and sample.J – Result measured above the MDL, but less than the quantitation limit.U – Result below the MDL. (Number shown in parentheses is the quantitation limit).Table A-13. Duplicate of Influent to SBR System, Day 3 Analytical Results, DickersonAnalyteMethodUnitsDilutionValueSampleSpecific MDLSample-Specific QLConcentrationMolybdenum200.7ug/L21.640250Nickel200.8ug/L20.89449Selenium200.8ug/L20.624100Silver200.8ug/L20.592ND (2)USodium200.7ug/L218010,000190,000Thallium200.8ug/L20.4720.84JTin200.7ug/L24.8200ND (200)UTitanium200.7ug/L21.620100Vanadium200.8ug/L21.71011Zinc200.7ug/L29.14053Dissolved MetalsAluminum200.7ug/L29.420036JAntimony200.8ug/L20.7223.6Arsenic200.8ug/L21.243.6JBarium200.7ug/L22.520190Beryllium200.7ug/L20.712ND (2)UBoron200.7ug/L501705,000160,000BCadmium200.8ug/L21.242.3JCalcium200.7ug/L501,70010,0002,300,000Chromium200.8ug/L23.38ND (8)U,^Chromium (VI)218.6ug/L51.9610ND (10)UCobalt200.7ug/L21.1203.8JCopper200.8ug/L20.96446Iron200.7ug/L232200ND (200)ULead200.8ug/L20.732ND (2)UMagnesium200.7ug/L5054010,0001,200,000Manganese200.7ug/L20.5120210Mercury1631Eng/L20.481.015.56Molybdenum200.7ug/L21.640240

# A-39ND – Not detected (number in parentheses is the quantitation limit).^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.B – Analyte was found in the blank and sample.J – Result measured above the MDL, but less than the quantitation limit.U – Result below the MDL. (Number shown in parentheses is the quantitation limit).Table A-13. Duplicate of Influent to SBR System, Day 3 Analytical Results, DickersonAnalyteMethodUnitsDilutionValueSampleSpecific MDLSample-Specific QLConcentrationNickel200.8ug/L20.89450Selenium200.8ug/L20.624100Silver200.8ug/L20.592ND (2)USodium200.7ug/L218010,000180,000Thallium200.8ug/L20.4720.82JTin200.7ug/L24.8200ND (200)UTitanium200.7ug/L21.6203.1JVanadium200.8ug/L21.7104.7JZinc200.7ug/L29.14034J

# A-40ND – Not detected (number in parentheses is the quantitation limit).^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.B – Analyte was found in the blank and sample.D – Laboratory duplicate RPD greater than method-specified criteria.J – Result measured above the MDL, but less than the quantitation limit.U – Result below the MDL. (Number shown in parentheses is the quantitation limit).Table A-14. Duplicate of Effluent from SBR System, Day 2 Analytical Results, DickersonAnalyteMethodUnitsDilutionValueSampleSpecific MDLSample-Specific QLConcentrationClassicalsAmmonia350.1mg/L10.05510.2JNitrate Nitrite as N353.2mg/L10.0190.10.11Nitrogen, Total Kjeldahl351.2mg/L50.38513BBiochemical Oxygen Demand5210Bmg/L10.32.54.7Chemical Oxygen Demand410.4mg/L28.140180Chloride300.0mg/L200516007,800Sulfate300.0mg/L50122501,700Cyanide, Total4500 CN Emg/L10.0020.010.0042J,BTotal Dissolved Solids2540Cmg/L14710013,000Total Suspended Solids2540Dmg/L11.1412DPhosphorus, Total365.1mg/L10.0050.050.02JTotal MetalsAluminum200.7ug/L29.4200700Antimony200.8ug/L20.7225.3Arsenic200.8ug/L21.243JBarium200.7ug/L22.520300Beryllium200.7ug/L20.712ND (2)UBoron200.7ug/L501705,000180,000BCadmium200.8ug/L21.242.9JCalcium200.7ug/L501,70010,0002,700,000Chromium200.8ug/L23.38ND (8)U,^Cobalt200.7ug/L21.1204.2JCopper200.8ug/L20.96422Iron200.7ug/L232200120JLead200.8ug/L20.7320.94JMagnesium200.7ug/L5054010,0001,200,000Manganese200.7ug/L20.512083

# A-41ND – Not detected (number in parentheses is the quantitation limit).^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.B – Analyte was found in the blank and sample.D – Laboratory duplicate RPD greater than method-specified criteria.J – Result measured above the MDL, but less than the quantitation limit.U – Result below the MDL. (Number shown in parentheses is the quantitation limit).Table A-14. Duplicate of Effluent from SBR System, Day 2 Analytical Results, DickersonAnalyteMethodUnitsDilutionValueSampleSpecific MDLSample-Specific QLConcentrationMercury1631Eng/L40.972.026.3Molybdenum200.7ug/L21.640310Nickel200.8ug/L20.89464Selenium200.8ug/L20.624110Silver200.8ug/L20.592ND (2)USodium200.7ug/L218010,000220,000Thallium200.8ug/L20.4721JTin200.7ug/L24.8200ND (200)UTitanium200.7ug/L21.6205.1JVanadium200.8ug/L21.7104.3JZinc200.7ug/L29.14043Dissolved MetalsAluminum200.7ug/L29.420047JAntimony200.8ug/L20.7224.8Arsenic200.8ug/L21.243.3JBarium200.7ug/L22.520300Beryllium200.7ug/L20.712ND (2)UBoron200.7ug/L501705,000180,000BCadmium200.8ug/L21.242.5JCalcium200.7ug/L501,70010,0002,700,000Chromium200.8ug/L23.38ND (8)U,^Chromium (VI)218.6ug/L51.9610ND (10)UCobalt200.7ug/L21.1205JCopper200.8ug/L20.96418Iron200.7ug/L23220065JLead200.8ug/L20.7320.96JMagnesium200.7ug/L5054010,0001,300,000Manganese200.7ug/L20.512084

# A-42ND – Not detected (number in parentheses is the quantitation limit).^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.B – Analyte was found in the blank and sample.D – Laboratory duplicate RPD greater than method-specified criteria.J – Result measured above the MDL, but less than the quantitation limit.U – Result below the MDL. (Number shown in parentheses is the quantitation limit).Table A-14. Duplicate of Effluent from SBR System, Day 2 Analytical Results, DickersonAnalyteMethodUnitsDilutionValueSampleSpecific MDLSample-Specific QLConcentrationMercury1631Eng/L10.240.52.03Molybdenum200.7ug/L21.640310Nickel200.8ug/L20.89466Selenium200.8ug/L20.624110Silver200.8ug/L20.592ND (2)USodium200.7ug/L218010,000220,000Thallium200.8ug/L20.4721.2JTin200.7ug/L24.8200ND (200)UTitanium200.7ug/L21.6205.1JVanadium200.8ug/L21.7105.4JZinc200.7ug/L29.14039J

# a 

# Aluminum was detected in two equipment blanks for the 10-liter composite container at 2.53 ug/L and 4.71 ug/L.

ND – Not detected (number in parenthesis is the quantitation limit).



# A-43 Table A-15. Bottle Blank and Equipment Blank Analytical Data, Dickerson

Analyte Method Process Units Concentration

HDPE 250 ml Plastic Bottles – Bottle Blank (for metals and hexavalent chromium samples)

Aluminum EPA 1638 Total Recoverable ug/L ND (4.0)

Antimony EPA 1638 Total Recoverable ug/L ND (0.020)

Arsenic EPA 1638 Total Recoverable ug/L ND (0.15)

Barium EPA 1638 Total Recoverable ug/L ND (0.20)

Beryllium EPA 1638 Total Recoverable ug/L ND (0.060)

Boron EPA 1638 Total Recoverable ug/L ND (3.0)

Cadmium EPA 1638 Total Recoverable ug/L ND (0.020)

Calcium EPA 1638 Total Recoverable ug/L ND (40)

Chromium EPA 1638 Total Recoverable ug/L ND (0.10)

Cobalt EPA 1638 Total Recoverable ug/L ND (0.10)

Copper EPA 1638 Total Recoverable ug/L ND (0.10)

Iron EPA 1638 Total Recoverable ug/L ND (10)

Lead EPA 1638 Total Recoverable ug/L ND (0.040)

Magnesium EPA 1638 Total Recoverable ug/L ND (2.5)

Manganese EPA 1638 Total Recoverable ug/L ND (0.10)

Molybdenum EPA 1638 Total Recoverable ug/L ND (0.060)

Nickel EPA 1638 Total Recoverable ug/L ND (0.10)

Selenium EPA 1638 Total Recoverable ug/L ND (0.60)

Silver EPA 1638 Total Recoverable ug/L ND (0.020)

Sodium EPA 1638 Total Recoverable ug/L ND (20)

Thallium EPA 1638 Total Recoverable ug/L ND (0.0050)

Tin EPA 1638 Total Recoverable ug/L ND (0.10)

Titanium EPA 1638 Total Recoverable ug/L ND (0.50)

Vanadium EPA 1638 Total Recoverable ug/L ND (0.10)

Zinc EPA 1638 Total Recoverable ug/L ND (0.20)

HDPE 500 ml Plastic Bottles – Bottle Blank (for metals samples)

Aluminum EPA 1638 Total Recoverable ug/L ND (4.0)

Antimony EPA 1638 Total Recoverable ug/L ND (0.020)

Arsenic EPA 1638 Total Recoverable ug/L ND (0.15)

Barium EPA 1638 Total Recoverable ug/L ND (0.20)

Beryllium EPA 1638 Total Recoverable ug/L ND (0.060)

Boron EPA 1638 Total Recoverable ug/L ND (3.0)

Cadmium EPA 1638 Total Recoverable ug/L ND (0.020)

Calcium EPA 1638 Total Recoverable ug/L ND (40)

Chromium EPA 1638 Total Recoverable ug/L ND (0.10)

Cobalt EPA 1638 Total Recoverable ug/L ND (0.10)

Copper EPA 1638 Total Recoverable ug/L ND (0.10)

# a 

# Aluminum was detected in two equipment blanks for the 10-liter composite container at 2.53 ug/L and 4.71 ug/L.

ND – Not detected (number in parenthesis is the quantitation limit).



# A-44 Table A-15. Bottle Blank and Equipment Blank Analytical Data, Dickerson

Analyte Method Process Units Concentration

Iron EPA 1638 Total Recoverable ug/L ND (10)

Lead EPA 1638 Total Recoverable ug/L ND (0.040)

Magnesium EPA 1638 Total Recoverable ug/L ND (2.5)

Manganese EPA 1638 Total Recoverable ug/L ND (0.10)

Molybdenum EPA 1638 Total Recoverable ug/L ND (0.060)

Nickel EPA 1638 Total Recoverable ug/L ND (0.10)

Selenium EPA 1638 Total Recoverable ug/L ND (0.60)

Silver EPA 1638 Total Recoverable ug/L ND (0.020)

Sodium EPA 1638 Total Recoverable ug/L ND (20)

Thallium EPA 1638 Total Recoverable ug/L ND (0.0050)

Tin EPA 1638 Total Recoverable ug/L ND (0.10)

Titanium EPA 1638 Total Recoverable ug/L ND (0.50)

Vanadium EPA 1638 Total Recoverable ug/L ND (0.10)

Zinc EPA 1638 Total Recoverable ug/L ND (0.20)

125 ml Glass Bottles – Bottle Blank (for mercury composite samples)

Mercury EPA 1631E Total Recoverable ug/L ND (0.00050)

250 ml Glass Bottles – Bottle Bl ank (for mercury grab samples)

Mercury EPA 1631E Total Recoverable ug/L ND (0.00050)

LDPE 10 L Composite Bottles – Bottle Blank (sample composite bottle for dissolved/filtration pump-off)

Aluminum a 

# EPA 1638 Dissolved ug/L 4.71

Antimony EPA 1638 Dissolved ug/L ND (0.50)

Arsenic EPA 1638 Dissolved ug/L ND (0.50)

Barium EPA 1638 Dissolved ug/L ND (0.10)

Beryllium EPA 1638 Dissolved ug/L ND (0.10)

Cadmium EPA 1638 Dissolved ug/L ND (0.10)

Chromium EPA 1638 Dissolved ug/L ND (1.0)

Cobalt EPA 1638 Dissolved ug/L ND (0.10)

Copper EPA 1638 Dissolved ug/L ND (0.30)

Lead EPA 1638 Dissolved ug/L ND (0.050)

Manganese EPA 1638 Dissolved ug/L ND (0.50)

Molybdenum EPA 1638 Dissolved ug/L ND (0.50)

Nickel EPA 1638 Dissolved ug/L ND (0.50)

Selenium EPA 1638 Dissolved ug/L ND (2.0)

Silver EPA 1638 Dissolved ug/L ND (0.10)

Thallium EPA 1638 Dissolved ug/L ND (0.050)

Vanadium EPA 1638 Dissolved ug/L ND (1.0)

Zinc EPA 1638 Dissolved ug/L ND (0.50)

LDPE 20 L Composite Bottles – Bottle Blank (sample composite bottle for dissolved/filtration pump-off)

# a 

# Aluminum was detected in two equipment blanks for the 10-liter composite container at 2.53 ug/L and 4.71 ug/L.

ND – Not detected (number in parenthesis is the quantitation limit).



# A-45 Table A-15. Bottle Blank and Equipment Blank Analytical Data, Dickerson

Analyte Method Process Units Concentration

Aluminum EPA 1638 Dissolved ug/L ND (2.0)

Antimony EPA 1638 Dissolved ug/L ND (0.50)

Arsenic EPA 1638 Dissolved ug/L ND (0.50)

Barium EPA 1638 Dissolved ug/L ND (0.10)

Beryllium EPA 1638 Dissolved ug/L ND (0.10)

Cadmium EPA 1638 Dissolved ug/L ND (0.10)

Chromium EPA 1638 Dissolved ug/L ND (1.0)

Cobalt EPA 1638 Dissolved ug/L ND (0.10)

Copper EPA 1638 Dissolved ug/L ND (0.30)

Lead EPA 1638 Dissolved ug/L ND (0.050)

Manganese EPA 1638 Dissolved ug/L ND (0.50)

Molybdenum EPA 1638 Dissolved ug/L ND (0.50)

Nickel EPA 1638 Dissolved ug/L ND (0.50)

Selenium EPA 1638 Dissolved ug/L ND (2.0)

Silver EPA 1638 Dissolved ug/L ND (0.10)

Thallium EPA 1638 Dissolved ug/L ND (0.050)

Vanadium EPA 1638 Dissolved ug/L ND (1.0)

Zinc EPA 1638 Dissolved ug/L ND (0.50)

Sample Tap Tubing Set – Equipment Blank (seven feet of #73 silicone tubing, Y-sp litter, and two pieces of 5

feet of #24 silicone tubing for sample collect ion for mercury and metals from sample taps)

Aluminum EPA 1638 Total Recoverable ug/L ND (4.0)

Antimony EPA 1638 Total Recoverable ug/L ND (0.020)

Arsenic EPA 1638 Total Recoverable ug/L ND (0.15)

Barium EPA 1638 Total Recoverable ug/L ND (0.20)

Beryllium EPA 1638 Total Recoverable ug/L ND (0.060)

Boron EPA 1638 Total Recoverable ug/L ND (3.0)

Cadmium EPA 1638 Total Recoverable ug/L ND (0.020)

Calcium EPA 1638 Total Recoverable ug/L ND (40)

Chromium EPA 1638 Total Recoverable ug/L ND (0.10)

Cobalt EPA 1638 Total Recoverable ug/L ND (0.10)

Copper EPA 1638 Total Recoverable ug/L ND (0.10)

Iron EPA 1638 Total Recoverable ug/L ND (10)

Lead EPA 1638 Total Recoverable ug/L ND (0.040)

Magnesium EPA 1638 Total Recoverable ug/L ND (2.5)

Manganese EPA 1638 Total Recoverable ug/L ND (0.10)

Mercury EPA 1631E Total Recoverable ug/L ND (0.00050)

Molybdenum EPA 1638 Total Recoverable ug/L ND (0.060)

Nickel EPA 1638 Total Recoverable ug/L ND (0.10)

# a 

# Aluminum was detected in two equipment blanks for the 10-liter composite container at 2.53 ug/L and 4.71 ug/L.

ND – Not detected (number in parenthesis is the quantitation limit).



# A-46 Table A-15. Bottle Blank and Equipment Blank Analytical Data, Dickerson

Analyte Method Process Units Concentration

Selenium EPA 1638 Total Recoverable ug/L ND (0.60)

Silver EPA 1638 Total Recoverable ug/L ND (0.020)

Sodium EPA 1638 Total Recoverable ug/L ND (20)

Thallium EPA 1638 Total Recoverable ug/L ND (0.0050)

Tin EPA 1638 Total Recoverable ug/L ND (0.10)

Titanium EPA 1638 Total Recoverable ug/L ND (0.50)

Vanadium EPA 1638 Total Recoverable ug/L ND (0.10)

Zinc EPA 1638 Total Recoverable ug/L ND (0.20)

Pump-Off Tubing Set – Equipment Blan k (Three feet of Teflon® tubing, 10 feet of #73 silicone tubing, Ysplitter, and two pieces of 5 feet of #24 silicone tubing for total and di ssolved sample collection for metals)

Aluminum EPA 1638 Total Recoverable ug/L ND (4.0)

Antimony EPA 1638 Total Recoverable ug/L ND (0.020)

Arsenic EPA 1638 Total Recoverable ug/L ND (0.15)

Barium EPA 1638 Total Recoverable ug/L ND (0.20)

Beryllium EPA 1638 Total Recoverable ug/L ND (0.060)

Boron EPA 1638 Total Recoverable ug/L ND (3.0)

Cadmium EPA 1638 Total Recoverable ug/L ND (0.020)

Calcium EPA 1638 Total Recoverable ug/L ND (40)

Chromium EPA 1638 Total Recoverable ug/L ND (0.10)

Cobalt EPA 1638 Total Recoverable ug/L ND (0.10)

Copper EPA 1638 Total Recoverable ug/L ND (0.10)

Iron EPA 1638 Total Recoverable ug/L ND (10)

Lead EPA 1638 Total Recoverable ug/L ND (0.040)

Magnesium EPA 1638 Total Recoverable ug/L ND (2.5)

Manganese EPA 1638 Total Recoverable ug/L ND (0.10)

Mercury EPA 1631E Total Recoverable ug/L ND (0.00050)

Molybdenum EPA 1638 Total Recoverable ug/L ND (0.060)

Nickel EPA 1638 Total Recoverable ug/L ND (0.10)

Selenium EPA 1638 Total Recoverable ug/L ND (0.60)

Silver EPA 1638 Total Recoverable ug/L ND (0.020)

Sodium EPA 1638 Total Recoverable ug/L ND (20)

Thallium EPA 1638 Total Recoverable ug/L ND (0.0050)

Tin EPA 1638 Total Recoverable ug/L ND (0.10)

Titanium EPA 1638 Total Recoverable ug/L ND (0.50)

Vanadium EPA 1638 Total Recoverable ug/L ND (0.10)

Zinc EPA 1638 Total Recoverable ug/L ND (0.20)

T-Splitter Tubing Set – Equipment Blank (Ten feet of #7 3 silicone tubing, T-splitter, six feet of #73 silicone

tubing, and 15 feet of #73 silicone tubing for total and dissolved sample collect ion for metal composites)

Aluminum EPA 1638 Total Recoverable ug/L ND (4.0)

# a 

# Aluminum was detected in two equipment blanks for the 10-liter composite container at 2.53 ug/L and 4.71 ug/L.

ND – Not detected (number in parenthesis is the quantitation limit).



# A-47 Table A-15. Bottle Blank and Equipment Blank Analytical Data, Dickerson

Analyte Method Process Units Concentration

Antimony EPA 1638 Total Recoverable ug/L ND (0.020)

Arsenic EPA 1638 Total Recoverable ug/L ND (0.15)

Barium EPA 1638 Total Recoverable ug/L ND (0.20)

Beryllium EPA 1638 Total Recoverable ug/L ND (0.060)

Boron EPA 1638 Total Recoverable ug/L ND (3.0)

Cadmium EPA 1638 Total Recoverable ug/L ND (0.020)

Calcium EPA 1638 Total Recoverable ug/L ND (40)

Chromium EPA 1638 Total Recoverable ug/L ND (0.10)

Cobalt EPA 1638 Total Recoverable ug/L ND (0.10)

Copper EPA 1638 Total Recoverable ug/L ND (0.10)

Iron EPA 1638 Total Recoverable ug/L ND (10)

Lead EPA 1638 Total Recoverable ug/L ND (0.040)

Magnesium EPA 1638 Total Recoverable ug/L ND (2.5)

Manganese EPA 1638 Total Recoverable ug/L ND (0.10)

Mercury EPA 1631E Total Recoverable ug/L ND (0.00050)

Molybdenum EPA 1638 Total Recoverable ug/L ND (0.060)

Nickel EPA 1638 Total Recoverable ug/L ND (0.10)

Selenium EPA 1638 Total Recoverable ug/L ND (0.60)

Silver EPA 1638 Total Recoverable ug/L ND (0.020)

Sodium EPA 1638 Total Recoverable ug/L ND (20)

Thallium EPA 1638 Total Recoverable ug/L ND (0.0050)

Tin EPA 1638 Total Recoverable ug/L ND (0.10)

Titanium EPA 1638 Total Recoverable ug/L ND (0.50)

Vanadium EPA 1638 Total Recoverable ug/L ND (0.10)

Zinc EPA 1638 Total Recoverable ug/L ND (0.20)

# A-48ND – Not detected (number in parentheses is the quantitation limit).^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.B – Analyte was found in the blank and sample.J – Result measured above the MDL, but less than the quantitation limit.U – Result below the MDL. (Number shown in parentheses is the quantitation limit).Table A-16. Influent to FGD Wastewater Treatment SystemField Blank, Day 1 Analytical Results, DickersonAnalyteMethodUnitsDilutionValueSampleSpecific MDLSample-Specific QLConcentrationTotal MetalsAluminum 200.7 ug/L 2 9.4 200 ND (200) UAntimony 200.8 ug/L 2 0.72 2 ND (2) UArsenic 200.8 ug/L 2 1.2 4 ND (4) UBarium 200.7 ug/L 2 2.5 20 ND (20) UBeryllium 200.7 ug/L 2 0.71 2 ND (2) UBoron 200.7 ug/L 2 6.7 200 28 J,BCadmium 200.8 ug/L 2 1.2 4 ND (4) UCalcium 200.7 ug/L 2 69 400 ND (400) UChromium 200.8 ug/L 2 3.3 8 ND (8) U,^Cobalt 200.7 ug/L 2 1.1 20 ND (20) UCopper 200.8 ug/L 2 0.96 4 ND (4) UIron 200.7 ug/L 2 32 200 ND (200) ULead 200.8 ug/L 2 0.73 2 ND (2) UMagnesium 200.7 ug/L 2 21 400 ND (400) UManganese 200.7 ug/L 2 0.51 20 0.56 JMercury 1631E ng/L 1 0.24 0.5 0.73Molybdenum 200.7 ug/L 2 1.6 40 ND (40) UNickel 200.8 ug/L 2 0.89 4 ND (4) USelenium 200.8 ug/L 2 0.62 4 ND (4) USilver 200.8 ug/L 2 0.59 2 ND (2) USodium 200.7 ug/L 2 180 10,000 ND (10,000) UThallium 200.8 ug/L 2 0.47 2 ND (2) UTin 200.7 ug/L 2 4.8 200 ND (200) UTitanium 200.7 ug/L 2 1.6 20 ND (20) UVanadium 200.8 ug/L 2 1.7 10 ND (10) UZinc 200.7 ug/L 2 9.1 40 ND (40) UDissolved MetalsAluminum 200.7 ug/L 2 9.4 200 ND (200) UAntimony 200.8 ug/L 2 0.72 2 ND (2) UArsenic 200.8 ug/L 2 1.2 4 ND (4) U

# A-49ND – Not detected (number in parentheses is the quantitation limit).^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.B – Analyte was found in the blank and sample.J – Result measured above the MDL, but less than the quantitation limit.U – Result below the MDL. (Number shown in parentheses is the quantitation limit).Table A-16. Influent to FGD Wastewater Treatment SystemField Blank, Day 1 Analytical Results, DickersonAnalyteMethodUnitsDilutionValueSampleSpecific MDLSample-Specific QLConcentrationBarium 200.7 ug/L 2 2.5 20 ND (20) UBeryllium 200.7 ug/L 2 0.71 2 ND (2) UBoron 200.7 ug/L 2 6.7 200 31 J,BCadmium 200.8 ug/L 2 1.2 4 ND (4) UCalcium 200.7 ug/L 2 69 400 140 JChromium 200.8 ug/L 2 3.3 8 ND (8) U,^Chromium (VI) 218.6 ug/L 1 0.39 2 ND (2) UCobalt 200.7 ug/L 2 1.1 20 ND (20) UCopper 200.8 ug/L 2 0.96 4 ND (4) UIron 200.7 ug/L 2 32 200 ND (200) ULead 200.8 ug/L 2 0.73 2 ND (2) UMagnesium 200.7 ug/L 2 21 400 69 JManganese 200.7 ug/L 2 0.51 20 0.58 JMolybdenum 200.7 ug/L 2 1.6 40 ND (40) UNickel 200.8 ug/L 2 0.89 4 ND (4) USelenium 200.8 ug/L 2 0.62 4 ND (4) USilver 200.8 ug/L 2 0.59 2 ND (2) USodium 200.7 ug/L 2 180 10,000 ND (10,000) UThallium 200.8 ug/L 2 0.47 2 ND (2) UTin 200.7 ug/L 2 4.8 200 ND (200) UTitanium 200.7 ug/L 2 1.6 20 1.7 JVanadium 200.8 ug/L 2 1.7 10 3.4 JZinc 200.7 ug/L 2 9.1 40 13 J

# A-50ND – Not detected (number in parentheses is the quantitation limit).^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.B – Analyte was found in the blank and sample.J – Result measured above the MDL, but less than the quantitation limit.U – Result below the MDL. (Number shown in parentheses is the quantitation limit).Table A-17. Influent to SBR System Field Blank, Day 1 Analytical Results, DickersonAnalyteMethodUnitsDilutionValueSampleSpecific MDLSample-Specific QLConcentrationTotal MetalsAluminum200.7ug/L29.4200ND (200)UAntimony200.8ug/L20.722ND (2)UArsenic200.8ug/L21.24ND (4)UBarium200.7ug/L22.520ND (20)UBeryllium200.7ug/L20.712ND (2)UBoron200.7ug/L26.720038J,BCadmium200.8ug/L21.24ND (4)UCalcium200.7ug/L269400ND (400)UChromium200.8ug/L23.38ND (8)U,^Cobalt200.7ug/L21.120ND (20)UCopper200.8ug/L20.964ND (4)UIron200.7ug/L232200ND (200)ULead200.8ug/L20.732ND (2)UMagnesium200.7ug/L221400ND (400)UManganese200.7ug/L20.5120ND (20)UMercury1631Eng/L10.240.5ND (0.5)UMolybdenum200.7ug/L21.640ND (40)UNickel200.8ug/L20.894ND (4)USelenium200.8ug/L20.624ND (4)USilver200.8ug/L20.592ND (2)USodium200.7ug/L218010,000ND (10,000)UThallium200.8ug/L20.472ND (2)UTin200.7ug/L24.8200ND (200)UTitanium200.7ug/L21.620ND (20)UVanadium200.8ug/L21.710ND (10)UZinc200.7ug/L29.140ND (40)UDissolved MetalsAluminum200.7ug/L29.420041J

# A-51ND – Not detected (number in parentheses is the quantitation limit).^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.B – Analyte was found in the blank and sample.J – Result measured above the MDL, but less than the quantitation limit.U – Result below the MDL. (Number shown in parentheses is the quantitation limit).Table A-17. Influent to SBR System Field Blank, Day 1 Analytical Results, DickersonAnalyteMethodUnitsDilutionValueSampleSpecific MDLSample-Specific QLConcentrationAntimony200.8ug/L20.722ND (2)UArsenic200.8ug/L21.24ND (4)UBarium200.7ug/L22.520ND (20)UBeryllium200.7ug/L20.712ND (2)UBoron200.7ug/L26.720033J,BCadmium200.8ug/L21.24ND (4)UCalcium200.7ug/L269400ND (400)UChromium200.8ug/L23.38ND (8)U,^Chromium (VI)218.6ug/L10.392ND (2)UCobalt200.7ug/L21.120ND (20)UCopper200.8ug/L20.964ND (4)UIron200.7ug/L232200ND (200)ULead200.8ug/L20.732ND (2)UMagnesium200.7ug/L221400ND (400)UManganese200.7ug/L20.5120ND (20)UMolybdenum200.7ug/L21.640ND (40)UNickel200.8ug/L20.894ND (4)USelenium200.8ug/L20.624ND (4)USilver200.8ug/L20.592ND (2)USodium200.7ug/L218010,000ND (10,000)UThallium200.8ug/L20.472ND (2)UTin200.7ug/L24.8200ND (200)UTitanium200.7ug/L21.620ND (20)UVanadium200.8ug/L21.7102.9JZinc200.7ug/L29.140ND (40)U

# A-52ND – Not detected (number in parentheses is the quantitation limit).U – Result below the MDL. (Number shown in parentheses is the quantitation limit).Table A-18. Influent to SBR System Field Blank, Day 2 Analytical Results, DickersonAnalyteMethodUnitsDilutionValueSampleSpecific MDLSample-Specific QLConcentrationTotal MetalsMercury1631Eng/L10.240.5ND (0.5)U

# A-53ND – Not detected (number in parentheses is the quantitation limit).U – Result below the MDL. (Number shown in parentheses is the quantitation limit).Table A-19. Influent to SBR System,Day 3 Analytical Results, DickersonAnalyteMethodUnitsDilutionValueSampleSpecific MDLSample-Specific QLConcentrationTotal MetalsMercury1631Eng/L10.240.5ND (0.5)U

# A-54ND – Not detected (number in parentheses is the quantitation limit).U – Result below the MDL. (Number shown in parentheses is the quantitation limit).Table A-20. Influent to SBR System,Day 4 Analytical Results, DickersonAnalyteMethodUnitsDilutionValueSampleSpecific MDLSample-Specific QLConcentrationTotal MetalsMercury1631Eng/L10.240.5ND (0.5)U

# A-55ND – Not detected (number in parentheses is the quantitation limit).^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.B – Analyte was found in the blank and sample.J – Result measured above the MDL, but less than the quantitation limit.U – Result below the MDL. (Number shown in parentheses is the quantitation limit).Table A-21. Effluent from SBR System,Day 1 Analytical Results, DickersonAnalyteMethodUnitsDilutionValueSampleSpecific MDLSample-Specific QLConcentrationTotal MetalsAluminum200.7ug/L29.4200ND (200)UAntimony200.8ug/L20.722ND (2)UArsenic200.8ug/L21.24ND (4)UBarium200.7ug/L22.520ND (20)UBeryllium200.7ug/L20.712ND (2)UBoron200.7ug/L26.720022J,BCadmium200.8ug/L21.24ND (4)UCalcium200.7ug/L269400ND (400)UChromium200.8ug/L23.38ND (8)U,^Cobalt200.7ug/L21.120ND (20)UCopper200.8ug/L20.964ND (4)UIron200.7ug/L232200ND (200)ULead200.8ug/L20.732ND (2)UMagnesium200.7ug/L221400ND (400)UManganese200.7ug/L20.5120ND (20)UMercury1631Eng/L10.240.5ND (0.5)UMolybdenum200.7ug/L21.640ND (40)UNickel200.8ug/L20.894ND (4)USelenium200.8ug/L20.624ND (4)USilver200.8ug/L20.592ND (2)USodium200.7ug/L218010,000ND (10,000)UThallium200.8ug/L20.472ND (2)UTin200.7ug/L24.8200ND (200)UTitanium200.7ug/L21.620ND (20)UVanadium200.8ug/L21.710ND (10)UZinc200.7ug/L29.140ND (40)UDissolved MetalsAluminum200.7ug/L29.4200ND (200)U

# A-56ND – Not detected (number in parentheses is the quantitation limit).^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.B – Analyte was found in the blank and sample.J – Result measured above the MDL, but less than the quantitation limit.U – Result below the MDL. (Number shown in parentheses is the quantitation limit).Table A-21. Effluent from SBR System,Day 1 Analytical Results, DickersonAnalyteMethodUnitsDilutionValueSampleSpecific MDLSample-Specific QLConcentrationAntimony200.8ug/L20.722ND (2)UArsenic200.8ug/L21.24ND (4)UBarium200.7ug/L22.520ND (20)UBeryllium200.7ug/L20.712ND (2)UBoron200.7ug/L26.720017J,BCadmium200.8ug/L21.24ND (4)UCalcium200.7ug/L269400ND (400)UChromium200.8ug/L23.38ND (8)U,^Chromium (VI)218.6ug/L10.392ND (2)UCobalt200.7ug/L21.120ND (20)UCopper200.8ug/L20.964ND (4)UIron200.7ug/L23220070JLead200.8ug/L20.732ND (2)UMagnesium200.7ug/L221400ND (400)UManganese200.7ug/L20.5120ND (20)UMolybdenum200.7ug/L21.640ND (40)UNickel200.8ug/L20.894ND (4)USelenium200.8ug/L20.624ND (4)USilver200.8ug/L20.592ND (2)USodium200.7ug/L218010,000ND (10,000)UThallium200.8ug/L20.472ND (2)UTin200.7ug/L24.8200ND (200)UTitanium200.7ug/L21.620ND (20)UVanadium200.8ug/L21.7102.8JZinc200.7ug/L29.140ND (40)U

# A-57ND – Not detected (number in parentheses is the quantitation limit).^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.B – Analyte was found in the blank and sample.J – Result measured above the MDL, but less than the quantitation limit.U – Result below the MDL. (Number shown in parentheses is the quantitation limit).Table A-22. Effluent from SBR System,Day 2 Analytical Results, DickersonAnalyteMethodUnitsDilutionValueSampleSpecific MDLSample-Specific QLConcentrationTotal MetalsMercury1631Eng/L10.240.5ND (0.5)U

# A-58ND – Not detected (number in parentheses is the quantitation limit).^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits.B – Analyte was found in the blank and sample.J – Result measured above the MDL, but less than the quantitation limit.U – Result below the MDL. (Number shown in parentheses is the quantitation limit).Table A-23. Effluent from SBR System,Day 3 Analytical Results, DickersonAnalyteMethodUnitsDilutionValueSampleSpecific MDLSample-Specific QLConcentrationTotal MetalsMercury1631Eng/L10.240.5ND (0.5)U

# A-59ND – Not detected (number in parentheses is the quantitation limit).U – Result below the MDL. (Number shown in parentheses is the quantitation limit).Table A-24. Effluent from SBR System,Day 4 Analytical Results, DickersonAnalyteMethodUnitsDilutionValueSampleSpecific MDLSample-Specific QLConcentrationTotal MetalsMercury1631Eng/L10.240.5ND (0.5)UAppendix BDATA REVIEW NARRATIVESAppendix CPICTURES FROM THE SAMPLING EPISODEFigure C-1. Sampler Working Inside a “Cleanbox”Figure C-2. Sample Set Up at the Influentto the FGD Wastewater Treatment SystemFigure C-3. Composite Sample Collection SetUp at the Influent to the SBR SystemFigure C-4. Composite Sample Collection Set Upat the Effluent from the SBR System