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. INTRODUCTION ................................................................................................................. 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. FACILITY OVERVIEW ........................................................................................................ 2-1

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

2.2 FGD Wastewater Treatment 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. SAMPLE COLLECTION ....................................................................................................... 3-1

3.1 Sampling Points, Sample Collection Methods, 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. LABORATORY ANALYTICAL RESULTS AND DISCUSSION ................................................... 4-1

5. DATA QUALITY ................................................................................................................. 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. REFERENCES ..................................................................................................................... 6-1

Appendix A: ANALYTICAL RESULTS

Appendix B: DATA REVIEW NARRATIVES

Appendix C: PICTURES FROM THE SAMPLING EPISODE
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 Methods, Dickerson ................................................................................ 3-18

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

Table 3-7. Sample Preservation Summary, Dickerson .............................................................. 3-20

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

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

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

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

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

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

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

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

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

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

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

System, Dickerson ......................................................................................................... 4-14

Table 5-1. Field Blank Analytical Results, Dickerson ............................................................... 5-5

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

Table 5-3. Field Duplicate Results – Effluent from SBR 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 Influent to SBR System, Day 3 Analytical Results, Dickerson ...... A-37

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

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

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

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

Results, Dickerson ........................................................................................................ A-48

Table A-17. Influent to SBR System Field Blank, Day 1 Analytical Results, Dickerson ....... A-50

Table A-18. Influent to SBR System Field Blank, Day 2 Analytical Results, Dickerson ....... A-52

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

Table A-20. Influent to SBR 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, Dickerson 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. INTRODUCTION

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 generated by coal-fired steam electric power plants 

and evaluate treatment technologies and best management practices used to reduce pollutant 

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

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

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

6562 was to characterize the purge stream entering 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 present in the wastewater discharges from steam 

electric power plants that substantially contribute to the toxic loadings for the industry. 

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

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

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

the untreated FGD wastewaters and effluent quality from technologies designed to treat the 

wastewater. 

1.2 Power Plant Site Selection

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

configurations and characteristics of the plants. 

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

 The plant is a coal-fired power plant that burns eastern bituminous coal in each of 

its three generating units; 

 The plant operates limestone forced oxidation 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 selective non-catalytic reduction (SNCR) systems on all three 

units; and 

 The plant produces a commercial-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-sampling 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 Dickerson to meet with plant personnel, 

receive on-site safety training, review the sampling 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 samples with the Utility 

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

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

samples on behalf of the plant. 
2-1

2. FACILITY OVERVIEW

Dickerson operates three steam electric generating 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 are 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 all three units with a common wet FGD 

scrubber system to control the sulfur dioxide (SO2) releases from the plant. The wet FGD 

scrubber is designed to remove more than 95 percent of SO2 from the flue gas. With the addition 

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

control the discharges of the wastewater generated during the operation of the FGD scrubber. 

Sections 2.1 and 2.2 further discuss the FGD scrubber 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 (NOx) releases from the plant. Dickerson only operates the SNCR systems during 

ozone season, May 1 through September 30. 

The three electrostatic precipitators (ESPs) and one common 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, respectively. Dickerson utilizes ESPs and the baghouse to 

remove the fly ash from all three units. Forty percent of the flue gas from each unit goes to the 

individual unit’s ESP, while the remaining 60 percent 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 injection for SNCR system); 

 Air preheater; 

 ESP (unit-specific) and 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 demand1. The station continued to operate the FGD wastewater treatment system at 

reduced flow rates and EPA continued to collect samples as planned 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 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 limestone slurry as the sorbent for sulfur dioxide 

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

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

limestone particles that are too large for use 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 solids (by weight), is transferred to the limestone 

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

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

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

has three levels of flooding headers. The flooding 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 SO2, which reacts 

with the limestone particles and produces calcium sulfite. The droplets continue to flow 

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

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

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

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

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

per million (ppm). Typically, the chlorides concentration 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 primary hydrocyclones where the solid gypsum 

is separated from the water by centrifugal force. The 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 transferred to the vacuum 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 hydrocyclones is sent to the purge tank and then 

pumped to the FGD wastewater treatment system. 

Dickerson washes the gypsum sent to the vacuum 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-year 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 specifications 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 designed 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 wastewater treatment system four to six times per 

day, depending on the unit loading. The average total 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 treatment system 24 hours per day. Dickerson 

installed the wastewater treatment system to treat the FGD scrubber purge wastewater to meet its 

permit limits, which include limits for total suspended 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 process 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 treatment system, showing 

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

biological reactor portions of the treatment system. 

The secondary hydrocyclone overflow from the scrubbers is transferred to the purge tank 

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

sampling episode, the FGD influent wastewater 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 filtrate sump (which includes filter press filtrate, 

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

overflow). 

2.2.1 Physical/Chemical Separation 

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

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

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

sulfide complexes which have very low solubility products. Wastewater then 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 that facilitates removal of the solids in the wastewater. 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 wastewater treatment operator stated that 

turbidity levels were still elevated, although 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. 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 wastewater 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 treatment system is approximately 16 hours, based 

on operating level conditions. 

The majority of the sludge from the clarifier 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 approximately 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 filters is transferred to the SBR influent 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. Hypochloric acid (to reduce the pH of the water) and a carbon source 

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

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

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

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

Dickerson uses an SBR to biologically treat the wastewater to remove nitrogen by 

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

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

enclose the SBR by the winter of 2010/2011. The purpose of the tarps/building 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 basin 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 nitrogen gas in the low dissolved oxygen 

areas of the basin. The denitrifying 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 & React 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 transferred from the SBR to the SBR effluent 

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

treatment system, including the equalization tanks, is approximately 16 hours. The hydraulic 

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

tank, the wastewater is then pumped to continuous 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 discharge. 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 the 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 upstream of the equalization tank (i.e., the 

sample was collected prior to any chemical 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 (after 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: Please confirm that the sampling point descriptions accurately 

reflect the location of the sampling points.] 
2-7 Figure 2-1. Simplified Diagram of the FGD Wastewater Treatment System, Dickerson Generating 
2-8 

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

Generating Station 
2-9 

[QUESTION FOR DICKERSON: Please confirm that the sampling points are depicted accurately on the process flow d

the flow path between clarifier and SBR influent equalization tank. Also confirm HCl addition locatio
3-1

3. SAMPLE COLLECTION

During the Dickerson sampling episode, the sampling team followed the collection 

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

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

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

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

activities. 

3.1 Sampling Points, Sample Collection Methods, and Field Measurements

This section describes the sampling points, 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, sampling point descriptions, type of sample 

collection, and sample collection dates and times. Table 3-2 lists 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 the field measurement data collected from each 

sampling point. Table 3-4 presents a crosswalk between 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 Influent to the SBR (SP-2); 

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

 SP-6 Influent to FGD Wastewater Treatment 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 split samples with Dickerson’s representative 

by inserting a “Y” splitter into the sample tubing configuration 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., samples 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 Dickerson’s representative collected duplicate samples, 

with one filling the bottle immediately 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 that secures itself open with clips. The “cleanbox” is double-bagged 

with a clear inner bag, enclosed in a translucent outer bag. The “cleanbox” is handled using 

“clean hands / dirty hands” techniques, whereby the inner bag is handled 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 opening of the box, but is still able to see the sample bottles and 

tubing. The “cleanbox” minimizes potential atmospheric contamination during sample 

collection. Figure C-1, in Appendix C, is a picture 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 sealed 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 closed the sample bottle lid and sealed the inner 

bag as quickly as possible within 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 system (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 sampling location for SP-1. This sample was 

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

purge was not amenable to collecting representative split samples using composite sampling 

techniques. The sampling point was located inside 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 samples 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 tubing 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 sample tap, opened the valve, and allowed sample to 

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

did not close the valve until all samples were collected (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 sampling 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 containers for biochemical oxygen demand (BOD5), Group I, 

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

Table 3-6 for a list of Group I and Group II analytes. BOD5, Group I, Group II, and total cyanide 

samples were immediately placed on ice after sample collection. 

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

potassium-iodide starch test strips were used to measure for sulfides and oxidants, respectively. 

No sulfides or oxidants were detected during the 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 were 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 the silicone tubing, 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. 

The sampling team placed the end of the Teflon® tubing into the 10-liter 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 liters2

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

samples. 

Samplers collected the following dissolved 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 immediately 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 influent equalization tank. Dickerson installed a 

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

 

2

 On days 1, 2, and 3, the filter/tubing was purged for 1 liter. 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 outside (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 volumes into two 20-liter 

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

composite period. Following the composite period, 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 compositor to collect sample volume for all classical 

analytes (i.e., BOD5, Group I, and Group II, excluding cyanide). In addition to collecting 

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

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

grab sample for cyanide during each compositing period. 

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

and dissolved metals by 200.7, and total and dissolved 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 two 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 configuration was set up such that one end 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 sample tap, opened the valve, and allowed sample to 

flow through both sets of tubing before calibrating 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 projected 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 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 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 plastic bag was placed on top of the trash cans 

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

set-up at the influent 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 grab sample every day, ERG collected field blanks 

for total mercury samples. See Section 5.2.3 for a description 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 purging the tap for two minutes, the samples were collected directly from the 

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

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

therefore, duplicate samples were collected. ERG 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 the field measurement data for the influent to the 

SBR. 

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

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

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

split samples with Dickerson’s representatives; therefore, 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 sulfides and oxidants, respectively. No sulfides or 

oxidants were detected during the sampling episode at the influent to the SBR. ERG samplers 

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

samples on ice. 

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

followed “clean hands / dirty hands” sampling techniques 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 volume on each day of sample collection. 

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

transferred the wastewater collected in the 20-liter containers into the individual sample 

containers at the pump-off area. For this sampling 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 within 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 containers. 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 the silicone tubing, 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 collecting any samples of the influent to the SBR, the samplers 

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

description of the dissolved metals field blank sample collection at the influent 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 with 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 immediately 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 collected 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 previously filled 20-liter container. Once the tubing was purged 

with 2 liters of sample, samplers filled containers for biochemical oxygen demand (BOD5), 

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. BOD5, Group I, and Group II samples were 

immediately placed on ice after sample collection. 

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

the sampling episode. In addition, for all analytes, 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 collected downstream of the continuous backwash 

gravity filters and upstream of the treated water 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 Figure 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 volumes into two 20-liter 

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

composite period. Following the composite period, 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 compositor to collect sample volume for all classical 

analytes (i.e., BOD5, Group I, and Group II, excluding cyanide). In addition to collecting 

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

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

grab sample for cyanide during each compositing period. 
3-7

On day 1 only, ERG collected field blank samples (SP-8) for hexavalent chromium, total 

and dissolved metals by 200.7, and total and dissolved 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 two 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 configuration was set up such that one end 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 sample tap, opened the valve, and allowed sample to 

flow through both sets of tubing before calibrating 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 projected 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 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 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 plastic bag was placed on top of the trash cans 

to minimize contamination. Figure C-4, in Appendix 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 grab sample every day, ERG collected field blanks 

for total mercury samples. See Section 5.2.3 for a description 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 tap for two minutes, the samples were collected directly from the 

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

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

therefore, duplicate samples were collected. ERG 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 the field measurement data for the effluent from 

the SBR. 

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

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

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

split samples with Dickerson’s representatives; therefore, 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 sulfides 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 sodium hydroxide to a pH >10 S.U. and placed the 

samples on ice. 

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

followed “clean hands / dirty hands” sampling techniques 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 volume on each day of sample collection. 

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

transferred the wastewater collected in the 20-liter containers into the individual sample 

containers at the pump-off area. For this sampling 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 within 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 containers. 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 the silicone tubing, 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 collecting any samples of the effluent from the SBR, the samplers 

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

description of the dissolved metals field blank sample 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 “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 immediately 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 collected 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 previously filled 20-liter container. After the tubing was purged 

with 2 liters of sample, samplers filled containers for biochemical oxygen demand (BOD5), 

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. BOD5, Group I, and Group II samples were 

immediately placed on ice after 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 addition, 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 analyzed for the following pollutants: 

 Classicals: 

— Biochemical oxygen demand, 5-day (BOD5), 

— 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, including contributions from coal, scrubber sorbents, 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 sampling team preserved samples in accordance with 

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

collection, the samplers placed the BOD5, Group I, Group II, dissolved hexavalent chromium, 

and total cyanide samples on ice to cool the samples 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-preserved prior to extraction at the laboratory. The 

hexavalent chromium samples were preserved 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 tested for sulfides and oxidants immediately after 

sample collection. Because sulfides and oxidants were 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 sulfides 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 generating units and the FGD scrubber system, as well 

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

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

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

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

episode, and Table 3-12 presents the FGD wastewater treatment system 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 compositing period, Dickerson shut down all 

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

operate the FGD wastewater treatment system at reduced flow rates and EPA 

continued to collect samples as planned 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 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. 

 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 wastewater treatment operator stated that 

turbidity levels were still elevated, although 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 ammonium 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 much 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 treatment 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 the majority of the sample 

volume remained in the sample bottle, 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 shrouding the sampling tap prior to closing 

the inner bag; however, the lid 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 total 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 team collected the field test jar volume 

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

changed her gloves prior to collecting the total cyanide QC sample. 

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

EPA Method 200.8 with collision cell; however, after discussions with the 

laboratory, EPA decided to analyzed 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 1012a and 1146b

Influent to FGD Wastewater Treatment 

System – Day 2 

Grab 08/24/10 1126a and 1305 b

Influent to FGD Wastewater Treatment 

System – Day 3 

Grab 08/25/10 1135a and 1311b

Influent to FGD Wastewater Treatment 

System – Day 4 

Grab 08/26/10 1111a and 1300b

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

08/24/10 

0901c

1039d

Grab 08/23/10 

08/24/10 

0913e, 1514f , and 2113 g

0314 h 

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

08/25/10 

0900c

1031d 

Grab 08/24/10 

08/25/10 

0911e, 1518f , and 2113 g

0312 h 

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

08/26/10 

0900c

1014d 

Grab 08/25/10 

08/26/10 

0912e, 1517f , and 2114 g

0314 h 

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

08/27/10 

0900c

0825d 

Grab 08/26/10 

08/27/10 

0911e, 1516f , and 2107 g

0310 h 

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

08/24/10 

0731c

0955d 

Grab 08/23/10 

08/24/10 

0745e, 1345f , and 1946 g

0152 h 

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

08/25/10 

0730c

0945d 

Grab 08/24/10 

08/25/10 

0743e, 1346f , and 1948 g

0145h 

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

08/26/10 

0730c

0939d 

Grab 08/25/10 

08/26/10 

0744e, 1345f , and 1944 g

0143h 

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

08/27/10 

0731c

0657d 

Grab 08/26/10 

08/27/10 

0743e, 1345f , and 1942 g

0142h 
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 

0900c

1014d 

Grab 08/25/10 

08/26/10 

0914e, 1518f , and 2116 g

0315 h 

SP-5 Duplicate of Effluent from the SBR – 

Day 2 

Composite 08/24/10 

08/25/10 

0730c

0945d 

Grab 08/24/10 

08/25/10 

0745e, 1348f , and 1950 g

0146 h 

SP-6 Influent to FGD Wastewater Treatment 

System Field Blank 

Grab 08/23/10 0958i and 1139j

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

08/24/10 

0823k

1028l

Grab 08/23/10 0906m

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

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

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

SP-8 Effluent from the SBR Field Blank – 

Day 1 

Composite 08/23/10 

08/24/10 

0650k

0942l

Grab 08/23/10 0741m

Effluent from the SBR Field Blank – 

Day 2 

Grab 08/24/10 0739m

Effluent from the SBR Field Blank – 

Day 3 

Grab 08/25/10 0739m

Effluent from the SBR Field Blank – 

Day 4 

Grab 08/26/10 0738m

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 (BOD5, 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 (BOD5, 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. 
3-14 

Table 3-2. Sample Collection at Dickerson Steam Station

Sampling Point 

Number Sampling 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

SP-1 Influent to FGD Wastewater Treatment 

System 

4 4 4 4 4 4 4 4 

SP-2 Influent to the SBR 4+1QC 4+1QC 4+1QC 4+1QC 4+1QC 4+1QC 4+1QC 4+1QC 4SP-3 Effluent from the SBR 4+1QC 4+1QC 4+1QC 4+1QC 4+1QC 4+1QC 4+1QC 4+1QC 4SP-4 Duplicate of Influent to the SBR 1 1 1 1 1 1 1 1 SP-5 Duplicate of Effluent from the SBR 1 1 1 1 1 1 1 1 SP-6 Field Blank for Influent to FGD Wastewater 

Treatment System 

1 1 1 1 1 1 

SP-7 Field Blank for Influent to the SBR 1 1 1 1 4 1 SP-8 Field Blank for Effluent from the SBR 1 1 1 1 4 1 Total Number of Samples 17+2QC 17+2QC 17+2QC 17+2QC 23+2QC 14+2QC 17+2QC 14+2QC 1
3-15 

Table 3-3. Field Measurements, Dickerson

Sampling 

Point 

Number 

Sampling Point 

Description Date Time 

Temperature (°C) pH 

Waste 

Stream Flow 

Thermometer Probe Meter Rate (GPM) N

a Strips

SP-1 Influent to FGD 

Wastewater Treatment System – Day 1

8/23/10 1024 44 39 6.61 7 82.1b No detected sulfides or 

grab. 

Influent to FGD Wastewater Treatment System – Day 2 

8/24/10 1138 33 30 7 7.5 66.5b No detected sulfides or 

grab. 

Influent to FGD Wastewater Treatment System – Day 3 

8/25/10 1149 31 29.2 7.18 7 49.6b Samples collected were 

sulfides or oxidants in t

Influent to FGD Wastewater Treatment System – Day 4 

8/26/10 1123 33 30.1 7.01 7 60.2b No detected sulfides or 

grab. 

SP-2 Influent to SBR – Day 1 8/23/10 0915 38 36.1 7.03 7.5 112.1 No detected sulfides or 

grab. 8/23/10 1518 39 34.9 7.13 7 111.8

8/23/10 2120 38 35.6 7.12 7 109.4 8/24/10 0320 36 33.9 7.09 7 99.9 

Influent to the SBR – Day 2 

8/24/10 0914 36 33 6.98 7 96.6 No detected sulfides or 

grab. 8/24/10 1520 36 32.5 6.92 7 96.0 

8/24/10 2118 34 31.3 6.95 6.5 87.1 8/25/10 0320 32 29.3 6.92 6.5 81.6 

Influent to the SBR – Day 3 

8/25/10 0917 31 28.5 6.9 7 81.1 Clarifier bed overturne

by turbidity measuremewere grey and Grab 3 hfrom previous sampling sulfides or oxidants in t

8/25/10 1521 31 28.5 6.9 7 83.9 8/25/10 2132 31 28.7 6.87 6.5 78.6 8/26/10 0319 30 28.7 6.88 7.0 78.5 
3-16 

Table 3-3. Field Measurements, Dickerson

Sampling 

Point 

Number 

Sampling Point 

Description Date Time 

Temperature (°C) pH 

Waste 

Stream Flow 

Thermometer Probe Meter Rate (GPM) N

a Strips

SP-2 Influent to the SBR – 

Day 4 

8/26/10 0913 30.5 29 6.84 7 77.8 The samples collected w

grey/brownish. No detin total cyanide grab.

8/26/10 1518 32 30.3 6.63 7 83.4 8/26/10 2113 30 28.7 6.70 6.5 84.4 8/27/10 0320 30 27.6 6.77 6.5 79.2 

SP-3 Effluent from the SBR – 

Day 1

8/23/10 0748 31 29 7.12 7 97.3 The samples collected w

sulfides or oxidants in t

8/23/10 1349 32 29.4 7.06 7 95.38/23/10 1950 31 29.5 7.07 7 95.38/24/10 0158 31 29 7.11 7 88.3

Effluent from the SBR – Day 2 

8/24/10 0748 30.5 27.9 7.01 7 86.3 The samples collected w

sulfides or oxidants in t

8/24/10 1351 30 28.5 7.04 7.5 88.18/24/10 2005 30 28.3 7.01 7 88.18/25/10 0154 30 27.3 7.07 7.5 86.7

Effluent from the SBR – Day 3 

8/25/10 0746 30 27.8 7.01 7 86.3 No detected sulfides or 

grab. 8/25/10 1347 30 28.3 7.01 7 66.6

8/25/10 1949 30.5 29.3 6.93 7.5 66.68/26/10 0148 30 27.9 6.95 7.5 66.6

Effluent from the SBR – Day 4 

8/26/10 0745 30 27.5 6.91 7.5 66.8 Water color was light y

detected sulfides or oxigrab.

8/26/10 1348 31 29.3 6.92 7.5 67.88/26/10 1949 31 29.9 6.95 7 61.78/27/10 0149 30 26.8 6.94 6.5 61.7

a The pH meter was calibrated prior to the sampling episode and once every day during the sampling episode using prepackaged buffer 

and 10.0. 

b Based 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 samp
Sample Number Sample Point Sample Descriptio

71841 SP-1, Day 1 Influent to FGD Wastewater Treatment Syste71842 SP-1, Day 2 Influent to FGD Wastewater Treatment Syste71843 SP-1, Day 3 Influent to FGD Wastewater Treatment Syste71844 SP-1, Day 4 Influent to FGD Wastewater Treatment Syste71845 SP-2, Day 1 Influent to SBR System - Day 1 71846 SP-2, Day 2 Influent to SBR System - Day 2 71847 SP-2, Day 3 Influent to SBR System - Day 3 71848 SP-2, Day 4 Influent to SBR System - Day 4 71849 SP-3, Day 1 Effluent from SBR System - Day 1 71850 SP-3, Day 2 Effluent from SBR System - Day 2 71851 SP-3, Day 3 Effluent from SBR System - Day 3 71852 SP-3, Day 4 Effluent from SBR System - Day 4 71853 SP-4, Day 3 Duplicate of Influent to SBR System - Day 3 71854 SP-5, Day 2 Duplicate of Effluent from SBR System - Day 71855 SP-6, Day 1 Influent to FGD Wastewater Treatment Syste71856 SP-7, Day 1 Influent to SBR System Field Blank - Day 1 71857 SP-7, Day 2 Influent to SBR System Field Blank - Day 2 71858 SP-7, Day 3 Influent to SBR System Field Blank - Day 3 71859 SP-7, Day 4 Influent to SBR System Field Blank - Day 4 71860 SP-8, Day 1 Effluent from SBR System Field Blank - Day 71861 SP-8, Day 2 Effluent from SBR System Field Blank - Day 71862 SP-8, Day 3 Effluent from SBR System Field Blank - Day 71863 SP-8, Day 4 Effluent from SBR System Field Blank - Day 
Table 3-5. Analytical Methods, Dickerson

Parameter 

Classicals

Biochemical oxygen demand (BOD5) SM 5Chemical oxygen demand (COD) EPA Total suspended solids (TSS) SM 2Total dissolved solids (TDS) SM 2Sulfate EPA Chloride EPA Ammonia as nitrogen EPA Nitrate/nitrate as nitrogen EPA Total Kjeldahl nitrogen (TKN) EPA Total phosphorus EPA Total cyanide SM 4

Total and Dissolved Metals

Mercury EPA Hexavalent chromium (dissolved only) EPA Antimony, arsenic, cadmium, chromium, copper, lead, nickel, selenium, silver, thallium, and vanadium 

EPA 

Aluminum, barium, beryllium, boron, calcium, cobalt, iron, magnesium, manganese, molybdenum, sodium, tin, titanium, and zinc 

EPA 
Table 3-6. Summary of Sample Container and Planned Preserva

Parameter 

Sample 

Container and 

Volume 

QC Sample 

Container and 

Volume On-

Classicals BOD5 One 1-L plastic 

bottle 

One 1-L plastic bottle 

≤6C 

Group I a One 1-L plastic 

bottles 

One 1-L plastic bottles 

≤6C 

Group II b Two 1-L plastic 

bottles 

Two 1-L plastic bottles 

H2SO4 to p

Total cyanide One 1-L plastic 

bottle 

One 1-L plastic bottles 

Dilution unNaAsO2 un

present, Na≤6C 

Metals Total metals (EPA Method 200.8 with collision cell) 

One 500-mL plastic bottle 

No additional volume needed 

None (acid preser

Total metals (EPA Method 200.7) One 500-mL 

plastic bottle 

No additional volume needed 

None (acid preser

Dissolved metals (EPA Method 200.8 with collision cell) 

One 500-mL plastic bottle 

No additional volume needed 

0.45-μm fil(acid preser

Dissolved metals (EPA Method 200.7) One 500-mL 

plastic bottle 

No additional volume needed 

0.45-μm fil(acid preser

Total mercury: None 

Manual composite grab samples Four 125-mL (acid preser

glass bottle 

No additional volume needed 

Influent samples and field blank samples 

Two 250-mL glass bottle 

No additional volume needed 

Dissolved mercury: None 

(filter and alaboratory) Manual composite grab samples Four 125-mL glass bottle No additional volume needed 

Influent samples One 250-mL 

glass bottle 

No additional volume needed 

Hexavalent chromium One 250-mL 

plastic bottle 

No additional volume needed 

0.45-μm filAmmonium pH 9.3 – 9.

(a) Group I includes TSS, TDS, sulfate, and chloride. (b) Group II includes ammonia as nitrogen, COD, nitrate/nitrite as nitrogen, TKN, and total phospho
Sampling Point 

Number Analysis Date 

Chemical 

Added Initial pH 

71841 Group II Volume 1 8/23/10 H2SO4 7 71841 Group II Volume 2 8/23/10 H2SO4 7 71841 Hexavalent Chromium 8/23/10 (NH4)2SO4 Buffer 7 

NH4OH 7.9 

71855 Hexavalent Chromium – 

Field Blank 

8/23/10 (NH4)2SO4

Buffer 

5.5 

NH4OH 8.5 

71841 Total Cyanide 8/23/10 NaOH 7 71845 Total Cyanide 8/23/10 NaOH 7 71849 Total Cyanide 8/23/10 NaOH 7 71842 Group II Volume 1 8/24/10 H2SO4 7 71842 Group II Volume 2 8/24/10 H2SO4 7 71845 Group II Volume 1 8/24/10 H2SO4 7 71845 Group II Volume 2 8/24/10 H2SO4 7 71849 Group II Volume 1 8/24/10 H2SO4 7 71849 Group II Volume 2 8/24/10 H2SO4 7 71842 Hexavalent Chromium 8/24/10 (NH4)2SO4

Buffer 

7 

NH4OH 8.1 

71845 Hexavalent Chromium 8/24/10 (NH4)2SO4

Buffer 

7.5 

NH4OH 8.3 

71849 Hexavalent Chromium 8/24/10 (NH4)2SO4 Buffer 7.5 

NH4OH 8.3 

71856 Hexavalent Chromium – 

Field Blank 

8/24/10 (NH4)2SO4

Buffer 

6.5 

NH4OH 8.5 

71860 Hexavalent Chromium – 

Field Blank 8/24/10 (NH4)2SO4 Buffer 6 

NH4OH 8.5 

71842 Total Cyanide 8/24/10 NaOH 7 71846 Total Cyanide 8/24/10 NaOH 7 71850 Total Cyanide 8/24/10 NaOH 7 71854 Total Cyanide 8/24/10 NaOH 7 71843 Group II Volume 1 8/25/10 H2SO4 7 71843 Group II Volume 2 8/25/10 H2SO4 7 71846 Group II Volume 1 8/25/10 H2SO4 7 
Sampling Point 

Number Analysis Date 

Chemical 

Added Initial pH 

71846 Group II Volume 2 8/25/10 H2SO4 7 71850 Group II Volume 1 8/25/10 H2SO4 7 71850 Group II Volume 2 8/25/10 H2SO4 7 71854 Group II Volume 1 8/25/10 H2SO4 7 71854 Group II Volume 2 8/25/10 H2SO4 7 71843 Hexavalent Chromium 8/25/10 (NH4)2SO4

Buffer 

7 

NH4OH 8.5 

71846 Hexavalent Chromium 8/25/10 (NH4)2SO4

Buffer 

7 

NH4OH 8.1 

71850 Hexavalent Chromium 8/25/10 (NH4)2SO4

Buffer 

7 

NH4OH 8.1 

71854 Hexavalent Chromium 8/25/10 (NH4)2SO4

Buffer 

7 

NH4OH 8.1 

71843 Total Cyanide 8/25/10 NaOH 7 71847 Total Cyanide 8/25/10 NaOH 6.5 71851 Total Cyanide 8/25/10 NaOH 7.5 71851 Total Cyanide - QC 8/25/10 NaOH 7.5 71853 Total Cyanide 8/25/10 NaOH 6.5 71844 Group II Volume 1 8/26/10 H2SO4 7 71844 Group II Volume 2 8/26/10 H2SO4 7 71847 Group II Volume 1 8/26/10 H2SO4 7 71847 Group II Volume 2 8/26/10 H2SO4 7 71851 Group II Volume 1 8/26/10 H2SO4 7 71851 Group II Volume 2 8/26/10 H2SO4 7 71851 Group II Volume 1 - QC 8/26/10 H2SO4 7 71851 Group II Volume 2 - QC 8/26/10 H2SO4 7 71853 Group II Volume 1 8/26/10 H2SO4 7 71853 Group II Volume 2 8/26/10 H2SO4 7 71844 Hexavalent Chromium 8/26/10 (NH4)2SO4

Buffer 

7 

NH4OH 8.1 

71847 Hexavalent Chromium 8/26/10 (NH4)2SO4

Buffer 

7 

NH4OH 8.3 
Sampling Point 

Number Analysis Date 

Chemical 

Added Initial pH 

71851 Hexavalent Chromium 8/26/10 (NH4)2SO4

Buffer 

7 

NH4OH 8.3 

71853 Hexavalent Chromium 8/26/10 (NH4)2SO4

Buffer 

7 

NH4OH 8.3 

71844 Total Cyanide 8/26/10 NaOH 7 71848 Total Cyanide 8/26/10 NaOH 6.5 71848 Total Cyanide - QC 8/26/10 NaOH 6.5 71852 Total Cyanide 8/26/10 NaOH 7.5 71848 Group II Volume 1 8/27/10 H2SO4 7 71848 Group II Volume 2 8/27/10 H2SO4 7 71848 Group II Volume 1 - QC 8/27/10 H2SO4 7 71848 Group II Volume 2 - QC 8/27/10 H2SO4 7 71852 Group II Volume 1 8/27/10 H2SO4 7 71852 Group II Volume 2 8/27/10 H2SO4 7 71848 Hexavalent Chromium 8/27/10 (NH4)2SO4

Buffer 

7 

NH4OH 8.3 

71852 Hexavalent Chromium 8/27/10 (NH4)2SO4

Buffer 

7 

NH4OH 8.3 
Table 3-8. Generating Unit Operating Characteristics during Sample C

Unit ID Boiler Type 

Capacity 

(MW) 

Electricity Production 

(MW) 

(or Percent Capacity %)a 

SCR 

(No, On, Off) 

1 Coal 191 20% Off 2 Coal 191 20% Off 3 Coal 191 20% Off 

a The percent capacity was measured on a daily basis from midnight on August 24 to midnight on A

ESP/BH – Electrostatic precipitator and baghouse. 
3-24 

Table 3-9. FGD Scrubber System Operating Characteristics, Dickerson 

Unit ID 

Wet FGD 

System (Yes/No) 

Type of 

Scrubber 

Forced 

Oxidation 

(Yes/No) Sorbent 

Additives (DBA, 

formic acid, etc.) 

FGD Make-up 

Water Source 

SO2 Re

Percen

1, 2, 3 Yes Tray Yes Limestone None Industrial WWTP – River water 96.2

Note: One FGD system services all three generating units.
g gp ,

Day of 

Sampling Unit ID Coal Type 

Amount of Coal 

Used During Day 

of Sampling 

(tpd) 

Source of Coal 

(Coal Region 

and/or State) 

Perce

Sulfu

Coa

(%

1 

1 Fed 2/Brooks Run 900a PA WV 5.1 1.7 

2 Fed 2/Brooks Run 825 PA WV 5.1 1.7 3 Fed 2/Brooks Run 704 PA WV 5.1 1.7 

2 

1 Fed 2/Storage 655 PA WV 4.9 1.7 

2 Fed 2 833 PA 4.9 3 Fed 2 715 PA 4.9 

3 

1 NAb NAb NAb NA

2 NAb NAb NAb NA3 NAb NAb NAb NA

4 

1 NAb NAb NAb NA

2 NAb NAb NAb NA3 NAb NAb NAb NA

a Estimated value. b All three generating units were shut down on days 3 and 4 due to low electricity demand[QUESTION FOR DICKERSON: What is Fed 2? Please also specify the units associated of the coal.] 

Table 3-11. Scrubber Slurry Information during Sample Collect

Day of 

Sampling 

FGD 

System ID 

Associated 

Unit IDs 

Scrubber Slurry 

Blowdown Flow Rate 

Scrubber 

Slurry 

Percent 

Solids 

Tim

Dewa

Du

Sampli

Flow Rate 

(gpm) Duration 

1 1 1, 2, 3 896 10.3 hrs 19-21% N2 1 1, 2, 3 696 2 hrs 19-21% N3 1 1, 2, 3 880 2.3 hrs 18.9-19.2% N4 1 1, 2, 3 884 2.6 hrs 18.9-19.0% N

NP – Data not provided by the plant. [QUESTION FOR DICKERSON: Please provide thscrubber system for each day of sampling, if available.]
3-26 

Table 3-12. FGD Wastewater Treatment System Operation Information, Dickerson

Day of Sampling 

Scrubber Purge 

Flow Rate 

(gpd) 

Chemical Usage 

Lime 

(tons/day) 

Ferric Chloride 

(liters/day) 

Organosulfide 

(liters/day)a 

Polymer 

(liters/day) 

1 118,217 7.3 (8.70 S.U.) 115 (47 ppm) NA 19.5 (20 ppm) 2 95,775 15.5 (8.70 S.U.) 110 (47 ppm) NA 19.3 (20 ppm) 3 71,394 15.1 (8.70 S.U.) 108 (47 ppm) NA 18 (20 ppm) 4 86,689 15.1 (8.70 S.U.) 107 (47 ppm) NA 17.5 (20 ppm) 

a Dickerson 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 results of analyses of sampl

the FGD wastewater treatment system and the influent to and effluent from 

Appendix A provides all analytical results for all samples collected 

including all qualified results and all results that were measured above the mlimit, but below the quantitation limit (i.e., J-values). 

Table 4-1 presents the analytical results for all classical and metal a

days of sampling at the influent to the FGD wastewater treatment system (S

calculated 4-day average result for each analyte for the sampling point. Tabpresent the analytical results for all classical and metal analytes for the four the influent to the SBR (SP-2) and the effluent from the SBR (SP-3), respec

Tables 4-1 through 4-3 include the analytical results for all analytes 

conducted analyses. Results are rounded to three significant digits. If an an

detected in a sample above the method detection limit, the result is reported the sample-specific quantitation limit in parentheses. If an analyte was meamethod detection limit, but below the quantitation limit, the result is reporteby the sample-specific quantitation limit in parentheses. 

For Table 4-2 (Influent to the SBR), a duplicate sample was collecte

sampling episode. The Day 3 results presented in Table 4-2 represent the aand the duplicate sample results. Table 5-2 presents the analytical results f

duplicate results and the calculated relative percent difference (RPD). For 

from the SBR), a duplicate sample was collected on Day 2 of the sampling results presented in Table 4-3 represent the average of the original and the dresults. Table 5-3 presents the analytical results for the original and duplicacalculated RPD. 

When calculating the average concentrations for the duplicate samp

averages, ERG used the following methodology: 

 If all results were above the quantitation limit, then all result

together; 

 If at least one result was above the quantitation limit, then 1⁄2 

was used in the average calculation for all results that were lquantitation limit and the result is reported with a less than s

 If all results were below the quantitation limit, but at least o

the method detection limit (i.e., J-value), then the sample-splimits for all results were averaged and the result is reported 

the average of the sample-specific quantitation limits; and 

 If all results were below the method detection limit, then the 

quantitation limits for all results were averaged and the resul

followed by the average of the sample-specific quantitation 
the FGD wastewater treatment system (SP-1), the influent to the SBR (SP-2

from the SBR (SP-3). Table 4-5 presents the 4-day average results for all mincluding total and dissolved analyses, for the influent to the FGD wastewa(SP-1), the influent to the SBR (SP-2), and the effluent from the SBR (SP-3presented in this report are not paired results, meaning that the sample colletreatment system was not timed to reflect the amount of time it takes the wathrough the system. 

Appendix Tables A-1 through A-14 present all the analytical results 

the FGD wastewater treatment system (SP-1), the influent to the SBR (SP-2the SBR (SP-3), the duplicate of the influent to the SBR (SP-4), and the dupfrom the SBR (SP-5) sample analyses, including J-values. 
4-3 

< - Average result includes at least one value measured below the quantitation limit. (Calculation uses 1⁄2 the quantitation limit for values below the quND – Not detected (number in parentheses is the quantitation limit). NQ – Analyte was measured above the method detection limit, but below the quantitation limit (number shown in parentheses is the quantitation limit

presented 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 

value. ^ - 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 dis

excluded 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 is within laboratory-specified criteria. 

Table 4-1. Influent to FGD Wastewater Treatment System, Dickerson 

Analyte Units Method 

Influent to FGD Wastewater Treatment System 

Day 1 Day 2 Day 3 D

Classicals Ammonia mg/L 350.1 5.90 5.40 4.00 4.9Nitrate Nitrite as N mg/L 353.2 67.0 67.0 47.0 62.Nitrogen, Total Kjeldahl mg/L 351.2 130 L 23.0 B 12.0 B 21.Biochemical Oxygen Demand mg/L 5210B NQ (2.50) 3.70 6.30 8.0Chemical Oxygen Demand mg/L 410.4 110 150 110 15Chloride mg/L 300.0 9,200 8,400 5,700 7,40Sulfate mg/L 300.0 1,800 1,800 1,700 1,80Cyanide, Total mg/L 4500 CN E 1.20 C 1.10 B 0.740 0.76Total Dissolved Solids mg/L 2540C 170,000** B 15,000 12,000 11,0Total Suspended Solids mg/L 2540D 3,900 11,000 3,900 3,70Phosphorus, Total mg/L 365.1 3.70 NQ (0.0500) 3.20 4.3Total Metals Aluminum ug/L 200.7 130,000 110,000 91,000 110,0Antimony ug/L 200.8 23.0 18.0 15.0 19.Arsenic ug/L 200.8 280 220 190 23Barium ug/L 200.7 700 720 590 79Beryllium ug/L 200.7 15.0 12.0 10.0 13.Boron ug/L 200.7 220,000 B 200,000 B 150,000 B 200,0Cadmium ug/L 200.8 31.0 27.0 21.0 27.Calcium ug/L 200.7 2,900,000 2,700,000 2,600,000 2,600Chromium ug/L 200.8 690 ^ 570 ^ 450 ^ 57Cobalt ug/L 200.7 130 120 99.0 12Copper ug/L 200.8 660 530 440 54Iron ug/L 200.7 180,000 160,000 130,000 160,0
4-4 

< - Average result includes at least one value measured below the quantitation limit. (Calculation uses 1⁄2 the quantitation limit for values below the quND – Not detected (number in parentheses is the quantitation limit). NQ – Analyte was measured above the method detection limit, but below the quantitation limit (number shown in parentheses is the quantitation limit

presented 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 

value. ^ - 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 dis

excluded 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 is within laboratory-specified criteria. 

Table 4-1. Influent to FGD Wastewater Treatment System, Dickerson 

Analyte Units Method 

Influent to FGD Wastewater Treatment System 

Day 1 Day 2 Day 3 D

Lead ug/L 200.8 220 170 140 18Magnesium ug/L 200.7 1,700,000 1,600,000 1,200,000 1,600Manganese ug/L 200.7 11,000 9,800 7,800 9,90Mercury ng/L 1631E 8,550 4,830 4,030 5,63Molybdenum ug/L 200.7 520 440 360 44Nickel ug/L 200.8 660 580 450 57Selenium ug/L 200.8 1,500 1,200 920 1,20Silver ug/L 200.8 ND (2.00) ND (2.00) ND (2.00) ND (2Sodium ug/L 200.7 200,000 190,000 160,000 190,0Thallium ug/L 200.8 NQ (2.00) NQ (2.00) 2.90 NQ (2Tin ug/L 200.7 NQ (200) NQ (200) NQ (200) NQ (2Titanium ug/L 200.7 6,200 5,400 4,500 5,60Vanadium ug/L 200.8 580 470 390 49Zinc ug/L 200.7 2,500 2,000 1,500 2,00Dissolved Metals Aluminum ug/L 200.7 NQ (200) NQ (200) NQ (200) NQ (2Antimony ug/L 200.8 3.70 3.80 2.80 3.5Arsenic ug/L 200.8 NQ (4.00) NQ (4.00) NQ (4.00) NQ (4Barium ug/L 200.7 250 210 130 14Beryllium ug/L 200.7 ND (2.00) ND (2.00) ND (2.00) ND (2Boron ug/L 200.7 210,000 B 190,000 B 150,000 B 200,0Cadmium ug/L 200.8 28.0 24.0 17.0 22.Calcium ug/L 200.7 2,300,000 2,100,000 1,600,000 2,100Chromium ug/L 200.8 ND (8.00) ^ ND (8.00) ^ ND (8.00) ^ ND (8Chromium (VI) ug/L 218.6 ND (10.0) ND (10.0) ND (10.0) ND (1
4-5 

< - Average result includes at least one value measured below the quantitation limit. (Calculation uses 1⁄2 the quantitation limit for values below the quND – Not detected (number in parentheses is the quantitation limit). NQ – Analyte was measured above the method detection limit, but below the quantitation limit (number shown in parentheses is the quantitation limit

presented 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 

value. ^ - 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 dis

excluded 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 is within laboratory-specified criteria. 

Table 4-1. Influent to FGD Wastewater Treatment System, Dickerson 

Analyte Units Method 

Influent to FGD Wastewater Treatment System 

Day 1 Day 2 Day 3 D

Cobalt ug/L 200.7 81.0 77.0 58.0 71.Copper ug/L 200.8 26.0 12.0 8.30 9.2Iron ug/L 200.7 NQ (200) NQ (200) NQ (200) NQ (2Lead ug/L 200.8 ND (2.00) ND (2.00) ND (2.00) ND (2Magnesium ug/L 200.7 1,600,000 1,500,000 1,200,000 1,500Manganese ug/L 200.7 11,000 10,000 8,100 10,0Mercury ng/L 1631E 177 49.7 193 24.Molybdenum ug/L 200.7 250 210 180 22Nickel ug/L 200.8 460 420 310 38Selenium ug/L 200.8 150 210 150 18Silver ug/L 200.8 ND (2.00) ND (2.00) ND (2.00) ND (2Sodium ug/L 200.7 210,000 200,000 160,000 200,0Thallium ug/L 200.8 2.40 NQ (2.00) NQ (2.00) NQ (2Tin ug/L 200.7 ND (200) ND (200) ND (200) ND (2Titanium ug/L 200.7 ND (20.0) ND (20.0) ND (20.0) ND (2Vanadium ug/L 200.8 NQ (10.0) NQ (10.0) NQ (10.0) NQ (1Zinc ug/L 200.7 1,300 700 370 45
4-6 

Note: The Day 3 results represent the average of the original sample and the field duplicate (SP-4). See Section 5.2.4 for the analytical results for the < - Average result includes at least one value measured below the quantitation limit. (Calculation uses 1⁄2 the quantitation limit for values below the qu

ND – Not detected (number in parentheses is the quantitation limit). NQ – Analyte was measured above the method detection limit, but below the quantitation limit (number shown in parentheses is the quantitation limit

presented 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 

value. ^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits. ** - The Day 3 influent to the SBR system was detected at a concentration of 42.8 ng/L, which seems like an erroneous result compared to the Day 3 d

concentration and the other three sample days. For presentation purposes in this table, the original sample result has been removed from the average othe calculation of the 4-day average result. 4 – MS and/or MSD did not meet laboratory criteria, but sample concentration is four times greater than the matrix spike amount, so control limits are 

B – Analyte was found in the blank and sample. F – MS and/or MSD not within laboratory control limits. 

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

Analyte Units Method

Influent to the SBR System (SP-2)

Day 1 Day 2 Day 3 Da

ClassicalsAmmonia mg/L 350.1 4.40 4.10 3.10 3.20 Nitrate Nitrite as N mg/L 353.2 48.0 43.0 38.0 37.0 Nitrogen, Total Kjeldahl mg/L 351.2 10.0 B NQ (10.0) B 10.5 NQ (10.Biochemical Oxygen Demand mg/L 5210B 4.00 3.00 NQ (2.50) 2.80 Chemical Oxygen Demand mg/L 410.4 160 81.0 135 130 Chloride mg/L 300.0 8,600 7,800 6,700 6,700 Sulfate mg/L 300.0 1,800 1,600 1,750 1,700 Cyanide, Total mg/L 4500 CN E 0.220 B 0.130 B 0.0520 0.0500 Total Dissolved Solids mg/L 2540C 14,000 14,000 12,500 12,000 Total Suspended Solids mg/L 2540D 38.0 37.0 70.5 42.0 Phosphorus, Total mg/L 365.1 NQ (0.0500) NQ (0.0500) < 0.0375 NQ (0.05Total MetalsAluminum ug/L 200.7 600 450 1,450 1,500 Antimony ug/L 200.8 5.50 4.40 4.60 3.90 Arsenic ug/L 200.8 NQ (4.00) NQ (4.00) 4.95 5.50 Barium ug/L 200.7 300 260 250 230 Beryllium ug/L 200.7 ND (2.00) ND (2.00) ND (2.00) ND (2.0Boron ug/L 200.7 170,000 B 170,000 B 160,000 150,00Cadmium ug/L 200.8 NQ (4.00) NQ (4.00) NQ (4.00) NQ (4.0Calcium ug/L 200.7 2,600,000 2,400,000 2,250,000 2,100,00Chromium ug/L 200.8 NQ (8.00) ^ NQ (8.00) ^ NQ (8.00) NQ (8.0
4-7 

Note: The Day 3 results represent the average of the original sample and the field duplicate (SP-4). See Section 5.2.4 for the analytical results for the < - Average result includes at least one value measured below the quantitation limit. (Calculation uses 1⁄2 the quantitation limit for values below the qu

ND – Not detected (number in parentheses is the quantitation limit). NQ – Analyte was measured above the method detection limit, but below the quantitation limit (number shown in parentheses is the quantitation limit

presented 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 

value. ^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits. ** - The Day 3 influent to the SBR system was detected at a concentration of 42.8 ng/L, which seems like an erroneous result compared to the Day 3 d

concentration and the other three sample days. For presentation purposes in this table, the original sample result has been removed from the average othe calculation of the 4-day average result. 4 – MS and/or MSD did not meet laboratory criteria, but sample concentration is four times greater than the matrix spike amount, so control limits are 

B – Analyte was found in the blank and sample. F – MS and/or MSD not within laboratory control limits. 

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

Analyte Units Method

Influent to the SBR System (SP-2)

Day 1 Day 2 Day 3 Da

Cobalt ug/L 200.7 NQ (20.0) NQ (20.0) NQ (20.0) NQ (20.Copper ug/L 200.8 43.0 46.0 55.5 98.0 Iron ug/L 200.7 740 570 1,700 1,800 Lead ug/L 200.8 2.70 NQ (2.00) 3.65 5.00 Magnesium ug/L 200.7 1,200,000 1,200,000 1,200,000 1,100,00Manganese ug/L 200.7 90.0 110 265 300 Mercury ng/L 1631E 222 200 446 416 Molybdenum ug/L 200.7 300 260 245 230 Nickel ug/L 200.8 60.0 51.0 50.5 50.0 Selenium ug/L 200.8 130 110 105 100 Silver ug/L 200.8 ND (2.00) ND (2.00) ND (2.00) ND (2.0Sodium ug/L 200.7 200,000 200,000 185,000 180,00Thallium ug/L 200.8 NQ (2.00) NQ (2.00) NQ (2.00) NQ (2.0Tin ug/L 200.7 ND (200) ND (200) ND (200) ND (20Titanium ug/L 200.7 46.0 35.0 99.5 100 Vanadium ug/L 200.8 NQ (10.0) NQ (10.0) 10.5 11.0 Zinc ug/L 200.7 NQ (40.0) NQ (40.0) 53.0 65.0 Dissolved MetalsAluminum ug/L 200.7 ND (200) NQ (200) NQ (200) NQ (20Antimony ug/L 200.8 4.80 4.80 3.60 4.10 Arsenic ug/L 200.8 NQ (4.00) NQ (4.00) NQ (4.00) NQ (4.0Barium ug/L 200.7 280 250 190 170 
4-8 

Note: The Day 3 results represent the average of the original sample and the field duplicate (SP-4). See Section 5.2.4 for the analytical results for the < - Average result includes at least one value measured below the quantitation limit. (Calculation uses 1⁄2 the quantitation limit for values below the qu

ND – Not detected (number in parentheses is the quantitation limit). NQ – Analyte was measured above the method detection limit, but below the quantitation limit (number shown in parentheses is the quantitation limit

presented 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 

value. ^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits. ** - The Day 3 influent to the SBR system was detected at a concentration of 42.8 ng/L, which seems like an erroneous result compared to the Day 3 d

concentration and the other three sample days. For presentation purposes in this table, the original sample result has been removed from the average othe calculation of the 4-day average result. 4 – MS and/or MSD did not meet laboratory criteria, but sample concentration is four times greater than the matrix spike amount, so control limits are 

B – Analyte was found in the blank and sample. F – MS and/or MSD not within laboratory control limits. 

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

Analyte Units Method

Influent to the SBR System (SP-2)

Day 1 Day 2 Day 3 Da

Beryllium ug/L 200.7 ND (2.00) ND (2.00) ND (2.00) ND (2.0Boron ug/L 200.7 180,000 B 170,000 B 160,000 160,00Cadmium ug/L 200.8 NQ (4.00) NQ (4.00) NQ (4.00) NQ (4.0Calcium ug/L 200.7 2,600,000 2,500,000 2,300,000 2,200,00Chromium ug/L 200.8 ND (8.00) ^ ND (8.00) ^ ND (8.00) ND (8.0Chromium (VI) ug/L 218.6 ND (10.0) ND (10.0) ND (10.0) ND (10.Cobalt ug/L 200.7 NQ (20.0) NQ (20.0) NQ (20.0) NQ (20.Copper ug/L 200.8 40.0 45.0 45.0 69.0 Iron ug/L 200.7 ND (200) ND (200) ND (200) ND (20Lead ug/L 200.8 NQ (2.00) NQ (2.00) ND (2.00) ND (2.0Magnesium ug/L 200.7 1,200,000 1,300,000 1,200,000 1,200,00Manganese ug/L 200.7 70.0 100 210 250 Mercury ng/L 1631E 5.97 6.78 5.56** 5.81 Molybdenum ug/L 200.7 290 260 240 230 Nickel ug/L 200.8 54.0 51.0 49.5 50.0 Selenium ug/L 200.8 120 110 97.0 95.0 Silver ug/L 200.8 ND (2.00) ND (2.00) ND (2.00) ND (2.0Sodium ug/L 200.7 190,000 190,000 180,000 180,00Thallium ug/L 200.8 NQ (2.00) NQ (2.00) NQ (2.00) NQ (2.0Tin ug/L 200.7 ND (200) ND (200) ND (200) ND (20Titanium ug/L 200.7 NQ (20.0) NQ (20.0) NQ (20.0) NQ (20.Vanadium ug/L 200.8 NQ (10.0) NQ (10.0) NQ (10.0) NQ (10.
4-9 

Note: The Day 3 results represent the average of the original sample and the field duplicate (SP-4). See Section 5.2.4 for the analytical results for the < - Average result includes at least one value measured below the quantitation limit. (Calculation uses 1⁄2 the quantitation limit for values below the qu

ND – Not detected (number in parentheses is the quantitation limit). NQ – Analyte was measured above the method detection limit, but below the quantitation limit (number shown in parentheses is the quantitation limit

presented 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 

value. ^ - ICV, CCV, ICB, CCB, ISA, ISB, CRI, or MRL standard: Instrument related QC exceeds the control limits. ** - The Day 3 influent to the SBR system was detected at a concentration of 42.8 ng/L, which seems like an erroneous result compared to the Day 3 d

concentration and the other three sample days. For presentation purposes in this table, the original sample result has been removed from the average othe calculation of the 4-day average result. 4 – MS and/or MSD did not meet laboratory criteria, but sample concentration is four times greater than the matrix spike amount, so control limits are 

B – Analyte was found in the blank and sample. F – MS and/or MSD not within laboratory control limits. 

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

Analyte Units Method

Influent to the SBR System (SP-2)

Day 1 Day 2 Day 3 Da

Zinc ug/L 200.7 NQ (40.0) NQ (40.0) NQ (40.0) 45.0 
4-10 

Note: The Day 2 results represent the average of the original sample and the field duplicate (SP-5). See Section 5.2.4 for the analytical results for the < - Average result includes at least one value measured below the quantitation limit. (Calculation uses 1⁄2 the quantitation limit for values below the qu

ND – Not detected (number in parentheses is the quantitation limit). NQ – Analyte was measured above the method detection limit, but below the quantitation limit (number shown in parentheses is the quantitation limit

presented 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 

value. ^ - 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 laboratory criteria, but sample concentration is four times greater than the matrix spike amount, so control limits are 

B – Analyte was found in the blank and sample. F – MS and/or MSD not within laboratory control limits. 

Table 4-3. Effluent from the SBR System, Dickerson 

Analyte Units Method 

Effluent from the SBR System (SP-3) 

Day 1 Day 2 Day 3 Day 

Classicals Ammonia mg/L 350.1 NQ (1.00) NQ (1.00) NQ (1.00) NQ (1.0Nitrate Nitrite as N mg/L 353.2 NQ (0.100) 0.110 0.140 0.150 Nitrogen, Total Kjeldahl mg/L 351.2 13.0 B 13.0 13.0 B,4 13.0 Biochemical Oxygen Demand mg/L 5210B 3.90 4.70 5.70 4.50 Chemical Oxygen Demand mg/L 410.4 150 185 140 F 84.0 Chloride mg/L 300.0 9,700 8,000 7,800 7,600 Sulfate mg/L 300.0 1,800 1,700 1,700 1,700 Cyanide, Total mg/L 4500 CN E 0.100 B NQ (0.0100) NQ (0.0100) B,F NQ (0.01Total Dissolved Solids mg/L 2540C 15,000 13,500 14,000 13,000 Total Suspended Solids mg/L 2540D 8.80 14.0 8.00 14.0 Phosphorus, Total mg/L 365.1 NQ (0.0500) NQ (0.0500) NQ (0.0500) NQ (0.05Total Metals Aluminum ug/L 200.7 660 710 870 920 Antimony ug/L 200.8 5.00 5.50 5.10 4.60 Arsenic ug/L 200.8 NQ (4.00) NQ (4.00) NQ (4.00) NQ (4.0Barium ug/L 200.7 310 305 280 230 Beryllium ug/L 200.7 ND (2.00) ND (2.00) ND (2.00) ND (2.0Boron ug/L 200.7 180,000 B 185,000 180,000 B,4 170,00Cadmium ug/L 200.8 NQ (4.00) NQ (4.00) NQ (4.00) NQ (4.0Calcium ug/L 200.7 2,700,000 2,750,000 2,700,000 4 2,400,0Chromium ug/L 200.8 ND (8.00) ^ ND (8.00) ND (8.00) ^ ND (8.0Cobalt ug/L 200.7 NQ (20.0) NQ (20.0) NQ (20.0) NQ (20Copper ug/L 200.8 21.0 22.0 21.0 32.0 Iron ug/L 200.7 NQ (200) NQ (200) NQ (200) NQ (20Lead ug/L 200.8 NQ (2.00) NQ (2.00) NQ (2.00) NQ (2.0Magnesium ug/L 200.7 1,300,000 1,250,000 1,300,000 4 1,200,0
4-11 

Note: The Day 2 results represent the average of the original sample and the field duplicate (SP-5). See Section 5.2.4 for the analytical results for the < - Average result includes at least one value measured below the quantitation limit. (Calculation uses 1⁄2 the quantitation limit for values below the qu

ND – Not detected (number in parentheses is the quantitation limit). NQ – Analyte was measured above the method detection limit, but below the quantitation limit (number shown in parentheses is the quantitation limit

presented 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 

value. ^ - 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 laboratory criteria, but sample concentration is four times greater than the matrix spike amount, so control limits are 

B – Analyte was found in the blank and sample. F – MS and/or MSD not within laboratory control limits. 

Table 4-3. Effluent from the SBR System, Dickerson 

Analyte Units Method 

Effluent from the SBR System (SP-3) 

Day 1 Day 2 Day 3 Day 

Manganese ug/L 200.7 81.0 84.5 100 160 Mercury ng/L 1631E 7.27 9.65 10.9 8.59 Molybdenum ug/L 200.7 320 315 300 260 Nickel ug/L 200.8 78.0 64.0 58.0 50.0 Selenium ug/L 200.8 110 110 110 100 Silver ug/L 200.8 ND (2.00) ND (2.00) ND (2.00) F ND (2.0Sodium ug/L 200.7 220,000 225,000 230,000 4 220,00Thallium ug/L 200.8 NQ (2.00) NQ (2.00) NQ (2.00) NQ (2.0Tin ug/L 200.7 ND (200) ND (200) ND (200) ND (20Titanium ug/L 200.7 NQ (20.0) NQ (20.0) NQ (20.0) NQ (20Vanadium ug/L 200.8 NQ (10.0) NQ (10.0) NQ (10.0) NQ (10Zinc ug/L 200.7 43.0 42.5 NQ (40.0) NQ (40Dissolved Metals Aluminum ug/L 200.7 NQ (200) NQ (200) NQ (200) NQ (20Antimony ug/L 200.8 5.70 5.10 4.50 4.80 Arsenic ug/L 200.8 NQ (4.00) NQ (4.00) NQ (4.00) NQ (4.0Barium ug/L 200.7 320 300 270 230 Beryllium ug/L 200.7 ND (2.00) ND (2.00) ND (2.00) ND (2.0Boron ug/L 200.7 190,000 B 180,000 180,000 B,4 170,00Cadmium ug/L 200.8 NQ (4.00) NQ (4.00) NQ (4.00) NQ (4.0Calcium ug/L 200.7 2,800,000 2,750,000 2,700,000 4 2,400,0Chromium ug/L 200.8 ND (8.00) ^ ND (8.00) ND (8.00) ^ ND (8.0Chromium (VI) ug/L 218.6 ND (10.0) ND (10.0) ND (10.0) ND (10Cobalt ug/L 200.7 NQ (20.0) NQ (20.0) NQ (20.0) NQ (20Copper ug/L 200.8 16.0 17.5 13.0 20.0 Iron ug/L 200.7 NQ (200) NQ (200) NQ (200) NQ (20Lead ug/L 200.8 NQ (2.00) NQ (2.00) ND (2.00) ND (2.0
4-12 

Note: The Day 2 results represent the average of the original sample and the field duplicate (SP-5). See Section 5.2.4 for the analytical results for the < - Average result includes at least one value measured below the quantitation limit. (Calculation uses 1⁄2 the quantitation limit for values below the qu

ND – Not detected (number in parentheses is the quantitation limit). NQ – Analyte was measured above the method detection limit, but below the quantitation limit (number shown in parentheses is the quantitation limit

presented 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 

value. ^ - 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 laboratory criteria, but sample concentration is four times greater than the matrix spike amount, so control limits are 

B – Analyte was found in the blank and sample. F – MS and/or MSD not within laboratory control limits. 

Table 4-3. Effluent from the SBR System, Dickerson 

Analyte Units Method 

Effluent from the SBR System (SP-3) 

Day 1 Day 2 Day 3 Day 

Magnesium ug/L 200.7 1,300,000 1,300,000 1,300,000 4 1,200,0Manganese ug/L 200.7 85.0 85.0 100 160 Mercury ng/L 1631E 1.69 4.28 8.61 F 1.21 Molybdenum ug/L 200.7 330 315 290 260 Nickel ug/L 200.8 78.0 66.5 57.0 51.0 Selenium ug/L 200.8 100 105 98.0 98.0 Silver ug/L 200.8 ND (2.00) ND (2.00) ND (2.00) F ND (2.0Sodium ug/L 200.7 220,000 220,000 220,000 4 210,00Thallium ug/L 200.8 NQ (2.00) NQ (2.00) NQ (2.00) NQ (2.0Tin ug/L 200.7 ND (200) ND (200) ND (200) ND (20Titanium ug/L 200.7 NQ (20.0) NQ (20.0) NQ (20.0) NQ (20Vanadium ug/L 200.8 NQ (10.0) NQ (10.0) NQ (10.0) NQ (10Zinc ug/L 200.7 43.0 < 31.0 NQ (40.0) NQ (40
4-13 

< - Average result includes at least one value measured below the quantitation limit. (Calculation uses 1⁄2 the quantitation limit for values below the qu* - The 4-day average result includes an analytical result where the accuracy is questionable. If the questionable result was excluded from the calculataverage would be 12,700 mg/L. NQ – Analyte was measured above the method detection limit, but below the quantitation limit (number shown in parentheses is the quantitation limit

presented 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 

value. 

Table 4-4. Classical Pollutants 4-Day Average Data Summary for FGD Wastewater Treatment Syst

Analyte Units Method

Influent to FGD 

Wastewater 

Treatment System (SP-1)

4-Day Average

Influent to 

SBR

System (SP-2)

4-Day Average

ClassicalsAmmonia mg/L 350.1 5.05 3.70 Nitrate Nitrite as N mg/L 353.2 60.8 41.5 Nitrogen, Total Kjeldahl mg/L 351.2 46.5 < 7.63 Biochemical Oxygen Demand mg/L 5210B < 4.81 < 2.76 Chemical Oxygen Demand mg/L 410.4 130 127 Chloride mg/L 300.0 7,680 7,450 Sulfate mg/L 300.0 1,780 1,710 Cyanide, Total mg/L 4500 CN E 0.950 0.113 Total Dissolved Solids mg/L 2540C 52,000* 13,100 Total Suspended Solids mg/L 2540D 5,630 46.9 Phosphorus, Total mg/L 365.1 < 2.81 < 0.0281 
4-14 

< - Average result includes at least one value measured below the quantitation limit. (Calculation uses 1⁄2 the quantitation limit for values below the qu* - The 4-day average result presented has been revised to exclude the Day 3 original sample result because it is an erroneous result based on the Day the 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, but below the quantitation limit (number shown in parentheses is the quantitation limit

presented 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 

value. 

Table 4-5. Metal Pollutants 4-Day Average Data Summary for FGD Wastewater Treatment Syste

Analyte Units Method

Influent to FGD 

Wastewater Treatment 

System (SP-1)

4-Day Average

Influent to 

SBR 

System (SP-2)

4-Day Average

Total Dissolved Total Dissolved Tot

MetalsAluminum ug/L 200.7 110,000 NQ (200) 1,000 NQ (200) 79Antimony ug/L 200.8 18.8 3.45 4.60 4.33 5.0Arsenic ug/L 200.8 230 NQ (4.00) < 3.61 NQ (4.00) NQ (4Barium ug/L 200.7 700 183 260 223 28Beryllium ug/L 200.7 12.5 ND (2.00) ND (2.00) ND (2.00) ND (2Boron ug/L 200.7 193,000 188,000 163,000 168,000 179,Cadmium ug/L 200.8 26.5 22.8 NQ (4.00) NQ (4.00) NQ (4Calcium ug/L 200.7 2,700,000 2,030,000 2,340,000 2,400,000 2,640Chromium ug/L 200.8 570 ND (8.00) NQ (8.00) ND (8.00) ND (8Chromium (VI) ug/L 218.6 NA ND (10.0) NA ND (10.0) NA Cobalt ug/L 200.7 117 71.8 NQ (20.0) NQ (20.0) NQ (2Copper ug/L 200.8 543 13.9 60.6 49.8 24Iron ug/L 200.7 158,000 NQ (200) 1,200 ND (200) NQ (Lead ug/L 200.8 178 ND (2.00) < 3.09 NQ (2.00) NQ (2Magnesium ug/L 200.7 1,530,000 1,450,000 1,180,000 1,230,000 1,260Manganese ug/L 200.7 9,630 9,780 191 158 10Mercury ng/L 1631E 5,760 111 321 6.03* 9.1Molybdenum ug/L 200.7 440 215 259 255 29Nickel ug/L 200.8 565 393 52.9 51.1 62Selenium ug/L 200.8 1,210 173 111 106 10Silver ug/L 200.8 ND (2.00) ND (2.00) ND (2.00) ND (2.00) ND (2Sodium ug/L 200.7 185,000 193,000 191,000 185,000 224,Thallium ug/L 200.8 < 1.48 < 1.35 NQ (2.00) NQ (2.00) NQ (2
4-15 

< - Average result includes at least one value measured below the quantitation limit. (Calculation uses 1⁄2 the quantitation limit for values below the qu* - The 4-day average result presented has been revised to exclude the Day 3 original sample result because it is an erroneous result based on the Day the 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, but below the quantitation limit (number shown in parentheses is the quantitation limit

presented 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 

value. 

Table 4-5. Metal Pollutants 4-Day Average Data Summary for FGD Wastewater Treatment Syste

Analyte Units Method

Influent to FGD 

Wastewater Treatment 

System (SP-1)

4-Day Average

Influent to 

SBR 

System (SP-2)

4-Day Average

Total Dissolved Total Dissolved Tot

Tin ug/L 200.7 NQ (200) ND (200) ND (200) ND (200) ND (Titanium ug/L 200.7 5,430 ND (20.0) 70.1 NQ (20.0) NQ (2Vanadium ug/L 200.8 483 NQ (10.0) < 7.88 NQ (10.0) NQ (1Zinc ug/L 200.7 2,000 705 < 39.5 < 26.3 < 3
Quality assurance/quality control (QA/QC) procedures applicable to 

sampling episode are outlined in the Quality Assurance Project Plan for the Rulemaking (QAPP) [2]. This section describes the QC procedures used to and accuracy of the analytical data presented in Section 4 and Appendix A. for this sampling episode include the analysis of matrix spikes, blanks, dupQC standard checks. 5.1 Analytical Quality Control

ERG contracted directly with analytical laboratories for the analysis 

during this episode. ERG verified that the performance of the laboratories sacceptable by conducting QC checks of the analytical data. Data review cheprepared written data review narratives describing any qualifications of the 

this episode. The data review narratives are included in Appendix B. 5.2 Field Quality Control

This subsection discusses the bottle blanks, equipment blanks, field 

duplicate sample results. Section 3.8 of the Sampling Plan discusses field Q5.2.1 Bottle Blanks 

ERG collects bottle blanks to evaluate possible contamination from 

bottles. Bottle blanks were collected and analyzed for metals (EPA Method 1631E) by the supplier of the precleaned bottles, Frontier Global Sciences. 

Frontier Global Sciences collected the bottle blanks for the metals s

filling the precleaned bottle with reagent water, preserving the sample with S.U. Frontier Global Sciences then analyzed the samples using EPA Metho

Frontier Global Sciences collected the bottle blanks for the mercury 

filling the precleaned bottle with reagent water, preserving the sample with monochloride. Frontier Global Sciences then analyzed the samples using E

Albion Environmental collected the bottle blanks for the 10- and 20

containers by filling the container with approximately two liters of ASTM Tallowing it to soak for approximately 24 hours. During this period, the labocontainer periodically and changed its orientation to expose all surfaces of t

ASTM Type 1 water. Albion Environmental then shook the 10- and 20-litepoured a representative sample into a precleaned LDPE sample bottle. The then preserved and analyzed according to the analytical methods (i.e., EPA 

No metals were detected in the bottle blanks, except for aluminum i

composite containers. Aluminum was detected in the 10-L container at a coug/L, which is well below the quantitation limit used for the sample analyse
collect the metals and mercury samples.

5.2.2 Equipment Blanks 

EPA collects equipment blanks to evaluate possible contamination f

used for sample collection. The techniques used to collect field blanks (as d5.2.3) include the sampling equipment and therefore would identify whetheequipment was introducing contamination. In addition, Frontier Global Scieanalyzed equipment blanks for metals (EPA Method 1638 and 1631E) for eprecleaned equipment supplied for the episode. 

Frontier Global Sciences collected the equipment blanks for the cap

fabricated tubing sets by pumping reagent water through the cleaned and fuequipment sets (with the filter attached) into a cleaned bottle (an HDPE botglass bottle for mercury). The blank samples were then preserved and analanalytical methods (EPA Method 1638 and 1631E), as described in Section blank samples. 

No other metals were detected in the equipment blanks, indicating t

contamination from the sampling equipment. Appendix Table A-15 presentresults from the bottle blank and equipment blank analyses for all of the equcollection of metals and mercury samples. 5.2.3 Field Blanks 

The sampling team collected field blanks (SP-6, SP-7, and SP-8) to 

contamination from sampling equipment, sampling equipment decontaminasample collection procedures, or atmospheric contamination. EPA analyzed samples for the total and dissolved metals and total and dissolved mercury 

The total mercury, total metals by 200.8, and total metals by 200.7 f

for the influent to the FGD wastewater treatment system (SP-6) were collecASTM Type 1 water through a precleaned funnel attached to the silicone tu

collection. To prevent potential atmospheric deposition, the sampling team water and funnel with a plastic bag while pouring the blank water into the fsample bottles in a “cleanbox.” Prior to filling the sample bottles, the tubing approximately 0.5 liters of blank water. The ASTM Type 1 water flowed thtubing, and “Y” splitter, and was poured into the sample bottles. EPA collesamples as “true” split samples with Dickerson’s representative, using the sdiscussed in the sample collection description (Section 3.1). 

3 EPA did not collect a dissolved mercury field blank sample because the sample filtration 

laboratory to minimize potential mercury contamination. The laboratory performed a filtrafiltering the sample, which is assessed as the field blank for the dissolved mercury sample

detected above the method detection limit (0 24 ng/L) in the filtration blanks performed fo
chromium field blank samples for the influent to the FGD wastewater treatm

were collected by pouring ASTM Type 1 water through the funnel and tubicomposite container. After around 90 minutes, the sampling team began puType 1 water from the 10-liter composite container. Prior to filling the samwas purged with 1 liter of blank water. The sample bottles were placed in a ASTM Type 1 water was pumped through the tubing, capsule filter, and “Y

sample bottles. EPA collected the field blank samples as “true” split samplerepresentative, using the same procedure discussed in the sample collection 3.1). 

The total mercury field blank sample for the influent to the SBR (SP

effluent from the SBR (SP-8) were collected by shrouding one of the three 

splitter with a clear plastic bag. Before purging the sample tap, ASTM Typdirectly into the sample bottles under the clear plastic bag. 

The total and dissolved metals by 200.7 and metals by 200.8 field b

influent to the SBR (SP-7) and the effluent from the SBR (SP-8) were colleliter composite container with ASTM Type 1 water. The same T-splitter tubmetals composite container at each point was used with a pump to fill the 2composite container. Prior to attaching one end of the tubing to the sample directly into the container holding ASTM Type 1 water. The other end of tattached to the vented cap on top of the 20-liter field blank composite contavolume was pumped into the 20-liter field blank composite container, the vreplaced with a closed cap and the container was placed on ice in a covered The vented cap used for the field blank collection was the same cap that wametals composite container. 

After 24 hours, the ASTM Type 1 water in the 20-liter field blank c

was pumped off into the individual sample bottles. The sample bottles were “cleanbox” and the ASTM Type 1 water was pumped through the tubing an

into the sample bottles. EPA collected the field blank samples as “true” splDickerson’s representative, using the same procedure discussed in the sampdescription (Section 3.1). Prior to filling the sample bottles, the tubing was approximately one liter of ASTM Type 1 water. First the samplers collected 200.8 and total metals by 200.7 field blank samples. Then the sampling team the tubing set and purged the tubing with approximately one liter of ASTM samplers then collected the dissolved metals by 200.8, dissolved metals by hexavalent chromium field blank samples. 

Table 5-1 presents the field blank analytical results for SP-6 through 

analytes that were detected in the field blank samples at levels above the quincluded in the table. Results are rounded to three significant digits. Appen

through A-24 present all the analytical results for the field blanks from each points, including all qualified results and all results that were measured abodetection limit, but below the quantitation limit (i.e., J-values). 
The sampling team collected field duplicate samples to assess the sa

precision for the episode. Field duplicate samples are separate samples colllocation as the original sample. The duplicate is filled immediately after the is stored and analyzed independently. The RPD between the two sample resdetermine the precision of the data. EPA used the following equation to calthe duplicate sample results. 

100

2

S

D

S

D

RPD (%)



 







 

where: 

S = concentration of the analyte from original sample anaD = concentration of the analyte from the duplicate sampRPD = relative percent difference between the original and d

result. 

During this sampling episode, EPA collected duplicate samples for 

SBR (SP-4) and the effluent from the SBR (SP-5) during day 3 and day 2 oepisode, respectively. The duplicate samples were analyzed for all analytespresent the analytical results and the RPD for SP-4 and SP-5, respectively. to three significant digits. Appendix Tables A-7 and A-13 present all the an

influent to the SBR (SP-2) Day 3 and the duplicate of the influent to the SBanalyses, including all qualified results and all results that were measured adetection limit, but below the quantitation limit (i.e., J-values). Appendix Tpresent all the analytical results for the effluent from the SBR (SP-3) Day 2 the effluent from the SBR (SP-5) sample analyses, including all qualified rethat were measured above the method detection limit, but below the quantitvalues). 
Table 5-1. Field Blank Analytical 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 below the quantitation limit. (Calculation uses 1⁄2 the quantitation limit for values below the qu

* - The dissolved mercury original sample result seems erroneous based on the Day 3 duplicate sample concentration and the other three sample days. 

was excluded from the presentation of the Day 3 average result in Table 4-2. Additionally, 5.56 ng/L (instead of 24.2 ng/L) was used in the calculatiopresented 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, but below the quantitation limit (number shown in parentheses is the quantitation limit

presented 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 

value. ^ - 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 5-6 

Table 5-2. Field Duplicate Results – Influent to SBR System, Dickerson 

Analyte Method Units 

Original Influent 

to SBR 

System, Day 3 

Concentration (SP-2) 

Duplicate Influent 

to SBR 

System 

Concentration (SP-4) 

Av

R

Classicals Ammonia 350.1 mg/L 2.90 3.30 Nitrate Nitrite as N 353.2 mg/L 38.0 38.0 Nitrogen, Total Kjeldahl 351.2 mg/L 10.0 B 11.0 B Biochemical Oxygen Demand 5210B mg/L NQ (2.50) NQ (2.50) NQ Chemical Oxygen Demand 410.4 mg/L 160 110 Chloride 300.0 mg/L 6,700 6,700 6Sulfate 300.0 mg/L 1,700 1,800 1Cyanide, Total 4500 CN E mg/L 0.0450 B 0.0590 B 0Total Dissolved Solids 2540C mg/L 12,000 13,000 1Total Suspended Solids 2540D mg/L 42.0 99.0 Phosphorus, Total 365.1 mg/L 0.0500 NQ (0.0500) < 0Total Metals Aluminum 200.7 ug/L 1,400 1,500 1Antimony 200.8 ug/L 4.50 4.70 Arsenic 200.8 ug/L 4.50 5.40 Barium 200.7 ug/L 240 260 Beryllium 200.7 ug/L ND (2.00) ND (2.00) ND Boron 200.7 ug/L 160,000 B 160,000 B 16Cadmium 200.8 ug/L NQ (4.00) NQ (4.00) NQ Calcium 200.7 ug/L 2,200,000 2,300,000 2,2Chromium 200.8 ug/L NQ (8.00) ^ NQ (8.00) ^ NQ Cobalt 200.7 ug/L NQ (20.0) NQ (20.0) NQ Copper 200.8 ug/L 54.0 57.0 Iron 200.7 ug/L 1,700 1,700 1
< - Average result includes at least one value measured below the quantitation limit. (Calculation uses 1⁄2 the quantitation limit for values below the qu

* - The dissolved mercury original sample result seems erroneous based on the Day 3 duplicate sample concentration and the other three sample days. 

was excluded from the presentation of the Day 3 average result in Table 4-2. Additionally, 5.56 ng/L (instead of 24.2 ng/L) was used in the calculatiopresented 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, but below the quantitation limit (number shown in parentheses is the quantitation limit

presented 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 

value. ^ - 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 5-7 

Table 5-2. Field Duplicate Results – Influent to SBR System, Dickerson 

Analyte Method Units 

Original Influent 

to SBR 

System, Day 3 

Concentration (SP-2) 

Duplicate Influent 

to SBR 

System 

Concentration (SP-4) 

Av

R

Lead 200.8 ug/L 3.50 3.80 Magnesium 200.7 ug/L 1,200,000 1,200,000 1,2Manganese 200.7 ug/L 260 270 Mercury 1631E ng/L 454 437 Molybdenum 200.7 ug/L 240 250 Nickel 200.8 ug/L 52.0 49.0 Selenium 200.8 ug/L 110 100 Silver 200.8 ug/L ND (2.00) ND (2.00) ND Sodium 200.7 ug/L 180,000 190,000 18Thallium 200.8 ug/L NQ (2.00) NQ (2.00) NQ Tin 200.7 ug/L ND (200) ND (200) ND Titanium 200.7 ug/L 99.0 100 Vanadium 200.8 ug/L 10.0 11.0 Zinc 200.7 ug/L 53.0 53.0 Dissolved Metals Aluminum 200.7 ug/L NQ (200) NQ (200) NQ Antimony 200.8 ug/L 3.60 3.60 Arsenic 200.8 ug/L NQ (4.00) NQ (4.00) NQ Barium 200.7 ug/L 190 190 Beryllium 200.7 ug/L ND (2.00) ND (2.00) ND Boron 200.7 ug/L 160,000 B 160,000 B 16Cadmium 200.8 ug/L NQ (4.00) NQ (4.00) NQ Calcium 200.7 ug/L 2,300,000 2,300,000 2,3Chromium 200.8 ug/L ND (8.00) ^ ND (8.00) ^ ND Chromium (VI) 218.6 ug/L ND (10.0) ND (10.0) ND 
< - Average result includes at least one value measured below the quantitation limit. (Calculation uses 1⁄2 the quantitation limit for values below the qu

* - The dissolved mercury original sample result seems erroneous based on the Day 3 duplicate sample concentration and the other three sample days. 

was excluded from the presentation of the Day 3 average result in Table 4-2. Additionally, 5.56 ng/L (instead of 24.2 ng/L) was used in the calculatiopresented 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, but below the quantitation limit (number shown in parentheses is the quantitation limit

presented 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 

value. ^ - 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 5-8 

Table 5-2. Field Duplicate Results – Influent to SBR System, Dickerson 

Analyte Method Units 

Original Influent 

to SBR 

System, Day 3 

Concentration (SP-2) 

Duplicate Influent 

to SBR 

System 

Concentration (SP-4) 

Av

R

Cobalt 200.7 ug/L NQ (20.0) NQ (20.0) NQ Copper 200.8 ug/L 44.0 46.0 Iron 200.7 ug/L ND (200) ND (200) ND Lead 200.8 ug/L ND (2.00) ND (2.00) ND Magnesium 200.7 ug/L 1,200,000 1,200,000 1,2Manganese 200.7 ug/L 210 210 Mercury 1631E ng/L 42.8* 5.56 2Molybdenum 200.7 ug/L 240 240 Nickel 200.8 ug/L 49.0 50.0 Selenium 200.8 ug/L 94.0 100 Silver 200.8 ug/L ND (2.00) ND (2.00) ND Sodium 200.7 ug/L 180,000 180,000 18Thallium 200.8 ug/L NQ (2.00) NQ (2.00) NQ Tin 200.7 ug/L ND (200) ND (200) ND Titanium 200.7 ug/L NQ (20.0) NQ (20.0) NQ Vanadium 200.8 ug/L NQ (10.0) NQ (10.0) NQ Zinc 200.7 ug/L NQ (40.0) NQ (40.0) NQ 
< - Average result includes at least one value measured below the quantitation limit. (Calculation uses 1⁄2 the quantitation limit for values below the qu

NC – Not calculated. ND – Not detected (number in parentheses is the quantitation limit). NQ – Analyte was measured above the method detection limit, but below the quantitation limit (number shown in parentheses is the quantitation limit

presented 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 

value. ^ - 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. 

5-9 

Table 5-3. Field Duplicate Results – Effluent from SBR System, Dickerson 

Analyte Method Units

Original Effluent 

from SBR

System, Day 2 

Concentration (SP-3)

Duplicate Effluent 

from SBR 

System 

Concentration (SP-5)

Ave

Re

ClassicalsAmmonia 350.1 mg/L NQ (1.00) NQ (1.00) NQ Nitrate Nitrite as N 353.2 mg/L 0.110 0.110 0.Nitrogen, Total Kjeldahl 351.2 mg/L 13.0 B 13.0 B 1Biochemical Oxygen Demand 5210B mg/L 4.70 4.70 4Chemical Oxygen Demand 410.4 mg/L 190 180 1Chloride 300.0 mg/L 8,200 7,800 8,Sulfate 300.0 mg/L 1,700 1,700 1,Cyanide, Total 4500 CN E mg/L NQ (0.0100) B NQ (0.0100) B NQ (0Total Dissolved Solids 2540C mg/L 14,000 13,000 13Total Suspended Solids 2540D mg/L 16.0 12.0 D 1Phosphorus, Total 365.1 mg/L NQ (0.0500) NQ (0.0500) NQ (0Total MetalsAluminum 200.7 ug/L 720 700 7Antimony 200.8 ug/L 5.70 5.30 5Arsenic 200.8 ug/L NQ (4.00) NQ (4.00) NQ Barium 200.7 ug/L 310 300 3Beryllium 200.7 ug/L ND (2.00) ND (2.00) ND Boron 200.7 ug/L 190,000 B 180,000 B 185Cadmium 200.8 ug/L NQ (4.00) NQ (4.00) NQ Calcium 200.7 ug/L 2,800,000 2,700,000 2,75Chromium 200.8 ug/L ND (8.00) ^ ND (8.00) ^ ND Cobalt 200.7 ug/L NQ (20.0) NQ (20.0) NQ Copper 200.8 ug/L 22.0 22.0 2
< - Average result includes at least one value measured below the quantitation limit. (Calculation uses 1⁄2 the quantitation limit for values below the qu

NC – Not calculated. ND – Not detected (number in parentheses is the quantitation limit). NQ – Analyte was measured above the method detection limit, but below the quantitation limit (number shown in parentheses is the quantitation limit

presented 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 

value. ^ - 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. 

5-10 

Table 5-3. Field Duplicate Results – Effluent from SBR System, Dickerson 

Analyte Method Units

Original Effluent 

from SBR

System, Day 2 

Concentration (SP-3)

Duplicate Effluent 

from SBR 

System 

Concentration (SP-5)

Ave

Re

Iron 200.7 ug/L NQ (200) NQ (200) NQ Lead 200.8 ug/L NQ (2.00) NQ (2.00) NQ Magnesium 200.7 ug/L 1,300,000 1,200,000 1,25Manganese 200.7 ug/L 86.0 83.0 8Mercury 1631E ng/L 13.0 6.30 9Molybdenum 200.7 ug/L 320 310 3Nickel 200.8 ug/L 64.0 64.0 6Selenium 200.8 ug/L 110 110 1Silver 200.8 ug/L ND (2.00) ND (2.00) ND Sodium 200.7 ug/L 230,000 220,000 225Thallium 200.8 ug/L NQ (2.00) NQ (2.00) NQ Tin 200.7 ug/L ND (200) ND (200) ND Titanium 200.7 ug/L NQ (20.0) NQ (20.0) NQ Vanadium 200.8 ug/L NQ (10.0) NQ (10.0) NQ Zinc 200.7 ug/L 42.0 43.0 4Dissolved MetalsAluminum 200.7 ug/L NQ (200) NQ (200) NQ Antimony 200.8 ug/L 5.40 4.80 5Arsenic 200.8 ug/L NQ (4.00) NQ (4.00) NQ Barium 200.7 ug/L 300 300 3Beryllium 200.7 ug/L ND (2.00) ND (2.00) ND Boron 200.7 ug/L 180,000 B 180,000 B 180Cadmium 200.8 ug/L NQ (4.00) NQ (4.00) NQ Calcium 200.7 ug/L 2,800,000 2,700,000 2,75
< - Average result includes at least one value measured below the quantitation limit. (Calculation uses 1⁄2 the quantitation limit for values below the qu

NC – Not calculated. ND – Not detected (number in parentheses is the quantitation limit). NQ – Analyte was measured above the method detection limit, but below the quantitation limit (number shown in parentheses is the quantitation limit

presented 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 

value. ^ - 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. 

5-11 

Table 5-3. Field Duplicate Results – Effluent from SBR System, Dickerson 

Analyte Method Units

Original Effluent 

from SBR

System, Day 2 

Concentration (SP-3)

Duplicate Effluent 

from SBR 

System 

Concentration (SP-5)

Ave

Re

Chromium 200.8 ug/L ND (8.00) ^ ND (8.00) ^ ND Chromium (VI) 218.6 ug/L ND (10.0) ND (10.0) ND Cobalt 200.7 ug/L NQ (20.0) NQ (20.0) NQ Copper 200.8 ug/L 17.0 18.0 1Iron 200.7 ug/L NQ (200) NQ (200) NQ Lead 200.8 ug/L NQ (2.00) NQ (2.00) NQ Magnesium 200.7 ug/L 1,300,000 1,300,000 1,30Manganese 200.7 ug/L 86.0 84.0 8Mercury 1631E ng/L 6.52 2.03 4Molybdenum 200.7 ug/L 320 310 3Nickel 200.8 ug/L 67.0 66.0 6Selenium 200.8 ug/L 100 110 1Silver 200.8 ug/L ND (2.00) ND (2.00) ND Sodium 200.7 ug/L 220,000 220,000 220Thallium 200.8 ug/L NQ (2.00) NQ (2.00) NQ Tin 200.7 ug/L ND (200) ND (200) ND Titanium 200.7 ug/L NQ (20.0) NQ (20.0) NQ Vanadium 200.8 ug/L NQ (10.0) NQ (10.0) NQ Zinc 200.7 ug/L 42.0 NQ (40.0) < 
1. Eastern Research Group, Inc., 2010. Final Sampling Plan, Mirant M

Dickerson Generating Station. August 19. DCN SE00503. 

2. Eastern Research Group, Inc., 2010. Quality Assurance Project Pla

Electric Effluent Guidelines Rulemaking. (October). DCN SE0005
Appendix A 

ANALYTICAL RESULTS 
A-1 

ND – 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 is within 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 Treatment System, Day 1 Analytical Results, Dick

Analyte Method Units

Dilution

Value

SampleSpecific MDL Sample- Specific QL 

ClassicalsAmmonia 350.1 mg/L 1 0.11 1 Nitrate Nitrite as N 353.2 mg/L 10 0.19 1 Nitrogen, Total Kjeldahl 351.2 mg/L 1 1.5 20 Biochemical Oxygen Demand 5210B mg/L 1 0.3 2.5 Chemical Oxygen Demand 410.4 mg/L 2 8.1 40 Chloride 300.0 mg/L 500 130 1,500 Sulfate 300.0 mg/L 100 23 500 Cyanide, Total 4500 CN E mg/L 4 0.008 0.04 Total Dissolved Solids 2540C mg/L 1 470 1,000 Total Suspended Solids 2540D mg/L 1 11 40 Phosphorus, Total 365.1 mg/L 5 0.025 0.25 Total MetalsAluminum 200.7 ug/L 2 9.4 200 Antimony 200.8 ug/L 2 0.72 2 Arsenic 200.8 ug/L 10 6.1 20 Barium 200.7 ug/L 2 2.5 20 Beryllium 200.7 ug/L 2 0.71 2 Boron 200.7 ug/L 50 170 5,000 Cadmium 200.8 ug/L 2 1.2 4 Calcium 200.7 ug/L 50 1,700 10,000 Chromium 200.8 ug/L 10 16 40 Cobalt 200.7 ug/L 2 1.1 20 Copper 200.8 ug/L 10 4.8 20 Iron 200.7 ug/L 50 800 5,000 Lead 200.8 ug/L 10 3.6 10 Magnesium 200.7 ug/L 50 540 10,000 
A-2 

ND – 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 is within 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 Treatment System, Day 1 Analytical Results, Dick

Analyte Method Units

Dilution

Value

SampleSpecific MDL Sample- Specific QL 

Manganese 200.7 ug/L 2 0.51 20 Mercury 1631E ng/L 500 121 252 Molybdenum 200.7 ug/L 2 1.6 40 Nickel 200.8 ug/L 2 0.89 4 Selenium 200.8 ug/L 2 0.62 4 Silver 200.8 ug/L 2 0.59 2 Sodium 200.7 ug/L 2 180 10,000 Thallium 200.8 ug/L 2 0.47 2 Tin 200.7 ug/L 2 4.8 200 Titanium 200.7 ug/L 2 1.6 20 Vanadium 200.8 ug/L 10 8.4 50 Zinc 200.7 ug/L 2 9.1 40 Dissolved MetalsAluminum 200.7 ug/L 2 9.4 200 Antimony 200.8 ug/L 2 0.72 2 Arsenic 200.8 ug/L 2 1.2 4 Barium 200.7 ug/L 2 2.5 20 Beryllium 200.7 ug/L 2 0.71 2 Boron 200.7 ug/L 50 170 5,000 Cadmium 200.8 ug/L 2 1.2 4 Calcium 200.7 ug/L 50 1,700 10,000 Chromium 200.8 ug/L 2 3.3 8 Chromium (VI) 218.6 ug/L 5 1.96 10 Cobalt 200.7 ug/L 2 1.1 20 Copper 200.8 ug/L 2 0.96 4 Iron 200.7 ug/L 2 32 200 Lead 200.8 ug/L 2 0.73 2 
A-3 

ND – 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 is within 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 Treatment System, Day 1 Analytical Results, Dick

Analyte Method Units

Dilution

Value

SampleSpecific MDL Sample- Specific QL 

Magnesium 200.7 ug/L 50 540 10,000 Manganese 200.7 ug/L 2 0.51 20 Mercury 1631E ng/L 10 2.41 5.05 Molybdenum 200.7 ug/L 2 1.6 40 Nickel 200.8 ug/L 2 0.89 4 Selenium 200.8 ug/L 2 0.62 4 Silver 200.8 ug/L 2 0.59 2 Sodium 200.7 ug/L 2 180 10,000 Thallium 200.8 ug/L 2 0.47 2 Tin 200.7 ug/L 2 4.8 200 Titanium 200.7 ug/L 2 1.6 20 Vanadium 200.8 ug/L 2 1.7 10 Zinc 200.7 ug/L 2 9.1 40 
A-4 

ND – 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 Treatment System, Day 2 Analytical Results, Dick

Analyte Method Units

Dilution

Value

SampleSpecific MDL Sample- Specific QL 

ClassicalsAmmonia 350.1 mg/L 1 0.11 1 Nitrate Nitrite as N 353.2 mg/L 10 0.19 1 Nitrogen, Total Kjeldahl 351.2 mg/L 1 0.77 10 Biochemical Oxygen Demand 5210B mg/L 1 0.3 2.5 Chemical Oxygen Demand 410.4 mg/L 2 8.1 40 Chloride 300.0 mg/L 500 130 1,500 Sulfate 300.0 mg/L 100 23 500 Cyanide, Total 4500 CN E mg/L 4 0.008 0.04 Total Dissolved Solids 2540C mg/L 1 47 100 Total Suspended Solids 2540D mg/L 1 55 200 Phosphorus, Total 365.1 mg/L 1 0.005 0.05 Total MetalsAluminum 200.7 ug/L 2 9.4 200 Antimony 200.8 ug/L 2 0.72 2 Arsenic 200.8 ug/L 10 6.1 20 Barium 200.7 ug/L 2 2.5 20 Beryllium 200.7 ug/L 2 0.71 2 Boron 200.7 ug/L 50 170 5,000 Cadmium 200.8 ug/L 2 1.2 4 Calcium 200.7 ug/L 50 1,700 10,000 Chromium 200.8 ug/L 10 16 40 Cobalt 200.7 ug/L 2 1.1 20 Copper 200.8 ug/L 10 4.8 20 Iron 200.7 ug/L 50 800 5,000 Lead 200.8 ug/L 2 0.73 2 Magnesium 200.7 ug/L 50 540 10,000 Manganese 200.7 ug/L 2 0.51 20 Mercury 1631E ng/L 500 121 252 
A-5 

ND – 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 Treatment System, Day 2 Analytical Results, Dick

Analyte Method Units

Dilution

Value

SampleSpecific MDL Sample- Specific QL 

Molybdenum 200.7 ug/L 2 1.6 40 Nickel 200.8 ug/L 2 0.89 4 Selenium 200.8 ug/L 2 0.62 4 Silver 200.8 ug/L 2 0.59 2 Sodium 200.7 ug/L 2 180 10,000 Thallium 200.8 ug/L 2 0.47 2 Tin 200.7 ug/L 2 4.8 200 Titanium 200.7 ug/L 2 1.6 20 Vanadium 200.8 ug/L 10 8.4 50 Zinc 200.7 ug/L 2 9.1 40 Dissolved MetalsAluminum 200.7 ug/L 2 9.4 200 Antimony 200.8 ug/L 2 0.72 2 Arsenic 200.8 ug/L 2 1.2 4 Barium 200.7 ug/L 2 2.5 20 Beryllium 200.7 ug/L 2 0.71 2 Boron 200.7 ug/L 50 170 5,000 Cadmium 200.8 ug/L 2 1.2 4 Calcium 200.7 ug/L 50 1,700 10,000 Chromium 200.8 ug/L 2 3.3 8 Chromium (VI) 218.6 ug/L 5 1.96 10 Cobalt 200.7 ug/L 2 1.1 20 Copper 200.8 ug/L 2 0.96 4 Iron 200.7 ug/L 2 32 200 Lead 200.8 ug/L 2 0.73 2 Magnesium 200.7 ug/L 50 540 10,000 Manganese 200.7 ug/L 2 0.51 20 Mercury 1631E ng/L 10 2.41 5.05 Molybdenum 200.7 ug/L 2 1.6 40 
A-6 

ND – 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 Treatment System, Day 2 Analytical Results, Dick

Analyte Method Units

Dilution

Value

SampleSpecific MDL Sample- Specific QL 

Nickel 200.8 ug/L 2 0.89 4 Selenium 200.8 ug/L 2 0.62 4 Silver 200.8 ug/L 2 0.59 2 Sodium 200.7 ug/L 2 180 10,000 Thallium 200.8 ug/L 2 0.47 2 Tin 200.7 ug/L 2 4.8 200 Titanium 200.7 ug/L 2 1.6 20 Vanadium 200.8 ug/L 2 1.7 10 Zinc 200.7 ug/L 2 9.1 40 
A-7 

ND – 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 Treatment System, Day 3 Analytical Results, Dick

Analyte Method Units

Dilution

Value

SampleSpecific MDL Sample- Specific QL 

ClassicalsAmmonia 350.1 mg/L 1 0.055 1 Nitrate Nitrite as N 353.2 mg/L 10 0.19 1 Nitrogen, Total Kjeldahl 351.2 mg/L 1 0.77 10 Biochemical Oxygen Demand 5210B mg/L 1 0.3 2.5 Chemical Oxygen Demand 410.4 mg/L 2 8.1 40 Chloride 300.0 mg/L 200 51 600 Sulfate 300.0 mg/L 50 12 250 Cyanide, Total 4500 CN E mg/L 4 0.008 0.04 Total Dissolved Solids 2540C mg/L 1 47 100 Total Suspended Solids 2540D mg/L 1 28 100 Phosphorus, Total 365.1 mg/L 5 0.025 0.25 Total MetalsAluminum 200.7 ug/L 2 9.4 200 Antimony 200.8 ug/L 2 0.72 2 Arsenic 200.8 ug/L 2 1.2 4 Barium 200.7 ug/L 2 2.5 20 Beryllium 200.7 ug/L 2 0.71 2 Boron 200.7 ug/L 50 170 5,000 Cadmium 200.8 ug/L 2 1.2 4 Calcium 200.7 ug/L 50 1,700 10,000 Chromium 200.8 ug/L 10 16 40 Cobalt 200.7 ug/L 2 1.1 20 Copper 200.8 ug/L 10 4.8 20 Iron 200.7 ug/L 50 800 5,000 Lead 200.8 ug/L 2 0.73 2 Magnesium 200.7 ug/L 50 540 10,000 Manganese 200.7 ug/L 2 0.51 20 Mercury 1631E ng/L 500 121 252 
A-8 

ND – 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 Treatment System, Day 3 Analytical Results, Dick

Analyte Method Units

Dilution

Value

SampleSpecific MDL Sample- Specific QL 

Molybdenum 200.7 ug/L 2 1.6 40 Nickel 200.8 ug/L 2 0.89 4 Selenium 200.8 ug/L 2 0.62 4 Silver 200.8 ug/L 2 0.59 2 Sodium 200.7 ug/L 2 180 10,000 Thallium 200.8 ug/L 2 0.47 2 Tin 200.7 ug/L 2 4.8 200 Titanium 200.7 ug/L 2 1.6 20 Vanadium 200.8 ug/L 10 8.4 50 Zinc 200.7 ug/L 2 9.1 40 Dissolved MetalsAluminum 200.7 ug/L 2 9.4 200 Antimony 200.8 ug/L 2 0.72 2 Arsenic 200.8 ug/L 2 1.2 4 Barium 200.7 ug/L 2 2.5 20 Beryllium 200.7 ug/L 2 0.71 2 Boron 200.7 ug/L 50 170 5,000 Cadmium 200.8 ug/L 2 1.2 4 Calcium 200.7 ug/L 2 69 400 Chromium 200.8 ug/L 2 3.3 8 Chromium (VI) 218.6 ug/L 5 1.96 10 Cobalt 200.7 ug/L 2 1.1 20 Copper 200.8 ug/L 2 0.96 4 Iron 200.7 ug/L 2 32 200 Lead 200.8 ug/L 2 0.73 2 Magnesium 200.7 ug/L 50 540 10,000 Manganese 200.7 ug/L 2 0.51 20 Mercury 1631E ng/L 20 4.83 10.1 Molybdenum 200.7 ug/L 2 1.6 40 
A-9 

ND – 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 Treatment System, Day 3 Analytical Results, Dick

Analyte Method Units

Dilution

Value

SampleSpecific MDL Sample- Specific QL 

Nickel 200.8 ug/L 2 0.89 4 Selenium 200.8 ug/L 2 0.62 4 Silver 200.8 ug/L 2 0.59 2 Sodium 200.7 ug/L 2 180 10,000 Thallium 200.8 ug/L 2 0.47 2 Tin 200.7 ug/L 2 4.8 200 Titanium 200.7 ug/L 2 1.6 20 Vanadium 200.8 ug/L 2 1.7 10 Zinc 200.7 ug/L 2 9.1 40 
A-10 

ND – 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 Treatment System, Day 4 Analytical Results, Dick

Analyte Method Units

Dilution

Value

SampleSpecific MDL Sample- Specific QL 

ClassicalsAmmonia 350.1 mg/L 1 0.055 1 Nitrate Nitrite as N 353.2 mg/L 10 0.19 1 Nitrogen, Total Kjeldahl 351.2 mg/L 1 0.77 10 Biochemical Oxygen Demand 5210B mg/L 1 0.59 5 Chemical Oxygen Demand 410.4 mg/L 2 8.1 40 Chloride 300.0 mg/L 200 51 600 Sulfate 300.0 mg/L 50 12 250 Cyanide, Total 4500 CN E mg/L 4 0.008 0.04 Total Dissolved Solids 2540C mg/L 1 47 100 Total Suspended Solids 2540D mg/L 1 18 67 Phosphorus, Total 365.1 mg/L 5 0.025 0.25 Total MetalsAluminum 200.7 ug/L 2 9.4 200 Antimony 200.8 ug/L 2 0.72 2 Arsenic 200.8 ug/L 10 6.1 20 Barium 200.7 ug/L 2 2.5 20 Beryllium 200.7 ug/L 2 0.71 2 Boron 200.7 ug/L 50 170 5,000 Cadmium 200.8 ug/L 2 1.2 4 Calcium 200.7 ug/L 50 1,700 10,000 Chromium 200.8 ug/L 10 16 40 Cobalt 200.7 ug/L 2 1.1 20 Copper 200.8 ug/L 10 4.8 20 Iron 200.7 ug/L 50 800 5,000 Lead 200.8 ug/L 2 0.73 2 Magnesium 200.7 ug/L 50 540 10,000 Manganese 200.7 ug/L 2 0.51 20 
A-11 

ND – 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 Treatment System, Day 4 Analytical Results, Dick

Analyte Method Units

Dilution

Value

SampleSpecific MDL Sample- Specific QL 

Mercury 1631E ng/L 500 121 252 Molybdenum 200.7 ug/L 2 1.6 40 Nickel 200.8 ug/L 2 0.89 4 Selenium 200.8 ug/L 2 0.62 4 Silver 200.8 ug/L 2 0.59 2 Sodium 200.7 ug/L 2 180 10,000 Thallium 200.8 ug/L 2 0.47 2 Tin 200.7 ug/L 2 4.8 200 Titanium 200.7 ug/L 2 1.6 20 Vanadium 200.8 ug/L 10 8.4 50 Zinc 200.7 ug/L 2 9.1 40 Dissolved MetalsAluminum 200.7 ug/L 2 9.4 200 Antimony 200.8 ug/L 2 0.72 2 Arsenic 200.8 ug/L 2 1.2 4 Barium 200.7 ug/L 2 2.5 20 Beryllium 200.7 ug/L 2 0.71 2 Boron 200.7 ug/L 50 170 5,000 Cadmium 200.8 ug/L 2 1.2 4 Calcium 200.7 ug/L 50 1,700 10,000 Chromium 200.8 ug/L 2 3.3 8 Chromium (VI) 218.6 ug/L 5 1.96 10 Cobalt 200.7 ug/L 2 1.1 20 Copper 200.8 ug/L 2 0.96 4 Iron 200.7 ug/L 2 32 200 Lead 200.8 ug/L 2 0.73 2 Magnesium 200.7 ug/L 50 540 10,000 Manganese 200.7 ug/L 2 0.51 20 
A-12 

ND – 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 Treatment System, Day 4 Analytical Results, Dick

Analyte Method Units

Dilution

Value

SampleSpecific MDL Sample- Specific QL 

Mercury 1631E ng/L 20 4.83 10.1 Molybdenum 200.7 ug/L 2 1.6 40 Nickel 200.8 ug/L 2 0.89 4 Selenium 200.8 ug/L 2 0.62 4 Silver 200.8 ug/L 2 0.59 2 Sodium 200.7 ug/L 2 180 10,000 Thallium 200.8 ug/L 2 0.47 2 Tin 200.7 ug/L 2 4.8 200 Titanium 200.7 ug/L 2 1.6 20 Vanadium 200.8 ug/L 2 1.7 10 Zinc 200.7 ug/L 2 9.1 40 
A-13 

ND – 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, Dickerson 

Analyte Method Units

Dilution

Value

SampleSpecific MDL Sample- Specific QL 

ClassicalsAmmonia 350.1 mg/L 1 0.11 1 Nitrate Nitrite as N 353.2 mg/L 10 0.19 1 Nitrogen, Total Kjeldahl 351.2 mg/L 1 0.77 10 Biochemical Oxygen Demand 5210B mg/L 1 0.3 2.5 Chemical Oxygen Demand 410.4 mg/L 2 8.1 40 Chloride 300.0 mg/L 500 130 1,500 Sulfate 300.0 mg/L 100 23 500 Cyanide, Total 4500 CN E mg/L 1 0.002 0.01 Total Dissolved Solids 2540C mg/L 1 47 100 Total Suspended Solids 2540D mg/L 1 1.1 4 Phosphorus, Total 365.1 mg/L 1 0.005 0.05 Total MetalsAluminum 200.7 ug/L 2 9.4 200 Antimony 200.8 ug/L 2 0.72 2 Arsenic 200.8 ug/L 2 1.2 4 Barium 200.7 ug/L 2 2.5 20 Beryllium 200.7 ug/L 2 0.71 2 Boron 200.7 ug/L 50 170 5,000 Cadmium 200.8 ug/L 2 1.2 4 Calcium 200.7 ug/L 50 1,700 10,000 Chromium 200.8 ug/L 2 3.3 8 Cobalt 200.7 ug/L 2 1.1 20 Copper 200.8 ug/L 2 0.96 4 Iron 200.7 ug/L 2 32 200 Lead 200.8 ug/L 2 0.73 2 Magnesium 200.7 ug/L 50 540 10,000 Manganese 200.7 ug/L 2 0.51 20 Mercury 1631E ng/L 10 2.41 5.05 
A-14 

ND – 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, Dickerson 

Analyte Method Units

Dilution

Value

SampleSpecific MDL Sample- Specific QL 

Molybdenum 200.7 ug/L 2 1.6 40 Nickel 200.8 ug/L 2 0.89 4 Selenium 200.8 ug/L 2 0.62 4 Silver 200.8 ug/L 2 0.59 2 Sodium 200.7 ug/L 2 180 10,000 Thallium 200.8 ug/L 2 0.47 2 Tin 200.7 ug/L 2 4.8 200 Titanium 200.7 ug/L 2 1.6 20 Vanadium 200.8 ug/L 2 1.7 10 Zinc 200.7 ug/L 2 9.1 40 Dissolved MetalsAluminum 200.7 ug/L 2 9.4 200 Antimony 200.8 ug/L 2 0.72 2 Arsenic 200.8 ug/L 2 1.2 4 Barium 200.7 ug/L 2 2.5 20 Beryllium 200.7 ug/L 2 0.71 2 Boron 200.7 ug/L 50 170 5,000 Cadmium 200.8 ug/L 2 1.2 4 Calcium 200.7 ug/L 50 1,700 10,000 Chromium 200.8 ug/L 2 3.3 8 Chromium (VI) 218.6 ug/L 5 1.96 10 Cobalt 200.7 ug/L 2 1.1 20 Copper 200.8 ug/L 2 0.96 4 Iron 200.7 ug/L 2 32 200 Lead 200.8 ug/L 2 0.73 2 Magnesium 200.7 ug/L 50 540 10,000 Manganese 200.7 ug/L 2 0.51 20 Mercury 1631E ng/L 1 0.24 0.5 Molybdenum 200.7 ug/L 2 1.6 40 
A-15 

ND – 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, Dickerson 

Analyte Method Units

Dilution

Value

SampleSpecific MDL Sample- Specific QL 

Nickel 200.8 ug/L 2 0.89 4 Selenium 200.8 ug/L 2 0.62 4 Silver 200.8 ug/L 2 0.59 2 Sodium 200.7 ug/L 2 180 10,000 Thallium 200.8 ug/L 2 0.47 2 Tin 200.7 ug/L 2 4.8 200 Titanium 200.7 ug/L 2 1.6 20 Vanadium 200.8 ug/L 2 1.7 10 Zinc 200.7 ug/L 2 9.1 40 
A-16 

ND – 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, Dickerson 

Analyte Method Units Dilution Value 

Sample-Specific 

MDL 

Sample-Specifi

QL 

Classicals Ammonia 350.1 mg/L 1 0.055 1 Nitrate Nitrite as N 353.2 mg/L 10 0.19 1 Nitrogen, Kjeldahl 351.2 mg/L 1 0.77 10 Biochemical Oxygen Demand 5210B mg/L 1 0.3 2.5 Chemical Oxygen Demand 410.4 mg/L 2 8.1 40 Chloride 300.0 mg/L 200 51 600 Sulfate 300.0 mg/L 50 12 250 Cyanide, Total 4500 CN E mg/L 1 0.002 0.01 Total Dissolved Solids 2540C mg/L 1 47 100 Total Suspended Solids 2540D mg/L 1 1.1 4 Phosphorus, Total 365.1 mg/L 1 0.005 0.05 Total Metals Aluminum 200.7 ug/L 2 9.4 200 Antimony 200.8 ug/L 2 0.72 2 Arsenic 200.8 ug/L 2 1.2 4 Barium 200.7 ug/L 2 2.5 20 Beryllium 200.7 ug/L 2 0.71 2 Boron 200.7 ug/L 50 170 5,000 Cadmium 200.8 ug/L 2 1.2 4 Calcium 200.7 ug/L 50 1,700 10,000 Chromium 200.8 ug/L 2 3.3 8 Cobalt 200.7 ug/L 2 1.1 20 Copper 200.8 ug/L 2 0.96 4 
A-17 

ND – 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, Dickerson 

Analyte Method Units Dilution Value 

Sample-Specific 

MDL 

Sample-Specifi

QL 

Iron 200.7 ug/L 2 32 200 Lead 200.8 ug/L 2 0.73 2 Magnesium 200.7 ug/L 50 540 10,000 Manganese 200.7 ug/L 2 0.51 20 Mercury 1631E ng/L 100 24.1 50.5 Molybdenum 200.7 ug/L 2 1.6 40 Nickel 200.8 ug/L 2 0.89 4 Selenium 200.8 ug/L 2 0.62 4 Silver 200.8 ug/L 2 0.59 2 Sodium 200.7 ug/L 2 180 10,000 Thallium 200.8 ug/L 2 0.47 2 Tin 200.7 ug/L 2 4.8 200 Titanium 200.7 ug/L 2 1.6 20 Vanadium 200.8 ug/L 2 1.7 10 Zinc 200.7 ug/L 2 9.1 40 Dissolved Metals Aluminum 200.7 ug/L 2 9.4 200 Antimony 200.8 ug/L 2 0.72 2 Arsenic 200.8 ug/L 2 1.2 4 Barium 200.7 ug/L 2 2.5 20 Beryllium 200.7 ug/L 2 0.71 2 Boron 200.7 ug/L 50 170 5,000 Cadmium 200.8 ug/L 2 1.2 4 Calcium 200.7 ug/L 50 1,700 10,000 
A-18 

ND – 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, Dickerson 

Analyte Method Units Dilution Value 

Sample-Specific 

MDL 

Sample-Specifi

QL 

Chromium 200.8 ug/L 2 3.3 8 Chromium (VI) 218.6 ug/L 5 1.96 10 Cobalt 200.7 ug/L 2 1.1 20 Copper 200.8 ug/L 2 0.96 4 Iron 200.7 ug/L 2 32 200 Lead 200.8 ug/L 2 0.73 2 Magnesium 200.7 ug/L 50 540 10,000 Manganese 200.7 ug/L 2 0.51 20 Mercury 1631E ng/L 4 0.97 2.02 Molybdenum 200.7 ug/L 2 1.6 40 Nickel 200.8 ug/L 2 0.89 4 Selenium 200.8 ug/L 2 0.62 4 Silver 200.8 ug/L 2 0.59 2 Sodium 200.7 ug/L 2 180 10,000 Thallium 200.8 ug/L 2 0.47 2 Tin 200.7 ug/L 2 4.8 200 Titanium 200.7 ug/L 2 1.6 20 Vanadium 200.8 ug/L 2 1.7 10 Zinc 200.7 ug/L 2 9.1 40 
A-19 

ND – 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, Dickerson 

Analyte Method Units

Dilution

Value

SampleSpecific MDL Sample- Specific QL 

ClassicalsAmmonia 350.1 mg/L 1 0.055 1 Nitrate Nitrite as N 353.2 mg/L 10 0.19 1 Nitrogen, Total Kjeldahl 351.2 mg/L 1 0.77 10 Biochemical Oxygen Demand 5210B mg/L 1 0.3 2.5 Chemical Oxygen Demand 410.4 mg/L 2 8.1 40 Chloride 300.0 mg/L 200 51 600 Sulfate 300.0 mg/L 50 12 250 Cyanide, Total 4500 CN E mg/L 1 0.002 0.01 Total Dissolved Solids 2540C mg/L 1 19 40 Total Suspended Solids 2540D mg/L 1 1.1 4 Phosphorus, Total 365.1 mg/L 1 0.005 0.05 Total MetalsAluminum 200.7 ug/L 2 9.4 200 Antimony 200.8 ug/L 2 0.72 2 Arsenic 200.8 ug/L 2 1.2 4 Barium 200.7 ug/L 2 2.5 20 Beryllium 200.7 ug/L 2 0.71 2 Boron 200.7 ug/L 50 170 5,000 Cadmium 200.8 ug/L 2 1.2 4 Calcium 200.7 ug/L 50 1,700 10,000 Chromium 200.8 ug/L 2 3.3 8 Cobalt 200.7 ug/L 2 1.1 20 Copper 200.8 ug/L 2 0.96 4 Iron 200.7 ug/L 2 32 200 Lead 200.8 ug/L 2 0.73 2 Magnesium 200.7 ug/L 50 540 10,000 Manganese 200.7 ug/L 2 0.51 20 Mercury 1631E ng/L 20 4.83 10.1 
A-20 

ND – 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, Dickerson 

Analyte Method Units

Dilution

Value

SampleSpecific MDL Sample- Specific QL 

Molybdenum 200.7 ug/L 2 1.6 40 Nickel 200.8 ug/L 2 0.89 4 Selenium 200.8 ug/L 2 0.62 4 Silver 200.8 ug/L 2 0.59 2 Sodium 200.7 ug/L 2 180 10,000 Thallium 200.8 ug/L 2 0.47 2 Tin 200.7 ug/L 2 4.8 200 Titanium 200.7 ug/L 2 1.6 20 Vanadium 200.8 ug/L 2 1.7 10 Zinc 200.7 ug/L 2 9.1 40 Dissolved MetalsAluminum 200.7 ug/L 2 9.4 200 Antimony 200.8 ug/L 2 0.72 2 Arsenic 200.8 ug/L 2 1.2 4 Barium 200.7 ug/L 2 2.5 20 Beryllium 200.7 ug/L 2 0.71 2 Boron 200.7 ug/L 50 170 5,000 Cadmium 200.8 ug/L 2 1.2 4 Calcium 200.7 ug/L 50 1,700 10,000 Chromium 200.8 ug/L 2 3.3 8 Chromium (VI) 218.6 ug/L 5 1.96 10 Cobalt 200.7 ug/L 2 1.1 20 Copper 200.8 ug/L 2 0.96 4 Iron 200.7 ug/L 2 32 200 Lead 200.8 ug/L 2 0.73 2 Magnesium 200.7 ug/L 50 540 10,000 Manganese 200.7 ug/L 2 0.51 20 Mercury 1631E ng/L 10 2.41 5.05 Molybdenum 200.7 ug/L 2 1.6 40 
A-21 

ND – 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, Dickerson 

Analyte Method Units

Dilution

Value

SampleSpecific MDL Sample- Specific QL 

Nickel 200.8 ug/L 2 0.89 4 Selenium 200.8 ug/L 2 0.62 4 Silver 200.8 ug/L 2 0.59 2 Sodium 200.7 ug/L 2 180 10,000 Thallium 200.8 ug/L 2 0.47 2 Tin 200.7 ug/L 2 4.8 200 Titanium 200.7 ug/L 2 1.6 20 Vanadium 200.8 ug/L 2 1.7 10 Zinc 200.7 ug/L 2 9.1 40 
A-22 

ND – 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 laboratory criteria, but sample concentration is four times greater than the matrix spike amount, so control limits are 

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, Dickerson 

Analyte Method Units

Dilution

Value

SampleSpecific MDL Sample- Specific QL 

ClassicalsAmmonia 350.1 mg/L 1 0.055 1 Nitrate Nitrite as N 353.2 mg/L 10 0.19 1 Nitrogen, Total Kjeldahl 351.2 mg/L 1 0.77 10 Biochemical Oxygen Demand 5210B mg/L 1 0.3 2.5 Chemical Oxygen Demand 410.4 mg/L 2 8.1 40 Chloride 300.0 mg/L 200 51 600 Sulfate 300.0 mg/L 50 12 250 Cyanide, Total 4500 CN E mg/L 1 0.002 0.01 Total Dissolved Solids 2540C mg/L 1 19 40 Total Suspended Solids 2540D mg/L 1 1.1 4 Phosphorus, Total 365.1 mg/L 1 0.005 0.05 Total MetalsAluminum 200.7 ug/L 2 9.4 200 Antimony 200.8 ug/L 2 0.72 2 Arsenic 200.8 ug/L 2 1.2 4 Barium 200.7 ug/L 2 2.5 20 Beryllium 200.7 ug/L 2 0.71 2 Boron 200.7 ug/L 50 170 5,000 Cadmium 200.8 ug/L 2 1.2 4 Calcium 200.7 ug/L 50 1,700 10,000 Chromium 200.8 ug/L 2 3.3 8 Cobalt 200.7 ug/L 2 1.1 20 Copper 200.8 ug/L 2 0.96 4 Iron 200.7 ug/L 2 32 200 Lead 200.8 ug/L 2 0.73 2 Magnesium 200.7 ug/L 50 540 10,000 
A-23 

ND – 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 laboratory criteria, but sample concentration is four times greater than the matrix spike amount, so control limits are 

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, Dickerson 

Analyte Method Units

Dilution

Value

SampleSpecific MDL Sample- Specific QL 

Manganese 200.7 ug/L 2 0.51 20 Mercury 1631E ng/L 500 121 252 Molybdenum 200.7 ug/L 2 1.6 40 Nickel 200.8 ug/L 2 0.89 4 Selenium 200.8 ug/L 2 0.62 4 Silver 200.8 ug/L 2 0.59 2 Sodium 200.7 ug/L 2 180 10,000 Thallium 200.8 ug/L 2 0.47 2 Tin 200.7 ug/L 2 4.8 200 Titanium 200.7 ug/L 2 1.6 20 Vanadium 200.8 ug/L 2 1.7 10 Zinc 200.7 ug/L 2 9.1 40 Dissolved MetalsAluminum 200.7 ug/L 2 9.4 200 Antimony 200.8 ug/L 2 0.72 2 Arsenic 200.8 ug/L 2 1.2 4 Barium 200.7 ug/L 2 2.5 20 Beryllium 200.7 ug/L 2 0.71 2 Boron 200.7 ug/L 50 170 5,000 Cadmium 200.8 ug/L 2 1.2 4 Calcium 200.7 ug/L 50 1,700 10,000 Chromium 200.8 ug/L 2 3.3 8 Chromium (VI) 218.6 ug/L 5 1.96 10 Cobalt 200.7 ug/L 2 1.1 20 Copper 200.8 ug/L 2 0.96 4 Iron 200.7 ug/L 2 32 200 Lead 200.8 ug/L 2 0.73 2 
A-24 

ND – 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 laboratory criteria, but sample concentration is four times greater than the matrix spike amount, so control limits are 

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, Dickerson 

Analyte Method Units

Dilution

Value

SampleSpecific MDL Sample- Specific QL 

Magnesium 200.7 ug/L 50 540 10,000 Manganese 200.7 ug/L 2 0.51 20 Mercury 1631E ng/L 2 0.48 1.01 Molybdenum 200.7 ug/L 2 1.6 40 Nickel 200.8 ug/L 2 0.89 4 Selenium 200.8 ug/L 2 0.62 4 Silver 200.8 ug/L 2 0.59 2 Sodium 200.7 ug/L 2 180 10,000 Thallium 200.8 ug/L 2 0.47 2 Tin 200.7 ug/L 2 4.8 200 Titanium 200.7 ug/L 2 1.6 20 Vanadium 200.8 ug/L 2 1.7 10 Zinc 200.7 ug/L 2 9.1 40 
A-25 

ND – 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, Dickerson 

Analyte Method Units

Dilution

Value

SampleSpecific MDL Sample- Specific QL 

ClassicalsAmmonia 350.1 mg/L 1 0.11 1 Nitrate Nitrite as N 353.2 mg/L 1 0.019 0.1 Nitrogen, Total Kjeldahl 351.2 mg/L 5 0.38 5 Biochemical Oxygen Demand 5210B mg/L 1 0.3 2.5 Chemical Oxygen Demand 410.4 mg/L 2 8.1 40 Chloride 300.0 mg/L 500 130 1,500 Sulfate 300.0 mg/L 100 23 500 Cyanide, Total 4500 CN E mg/L 1 0.002 0.01 Total Dissolved Solids 2540C mg/L 1 47 100 Total Suspended Solids 2540D mg/L 1 1.1 4 Phosphorus, Total 365.1 mg/L 1 0.005 0.05 Total MetalsAluminum 200.7 ug/L 2 9.4 200 Antimony 200.8 ug/L 2 0.72 2 Arsenic 200.8 ug/L 2 1.2 4 Barium 200.7 ug/L 2 2.5 20 Beryllium 200.7 ug/L 2 0.71 2 Boron 200.7 ug/L 50 170 5,000 Cadmium 200.8 ug/L 2 1.2 4 Calcium 200.7 ug/L 50 1,700 10,000 Chromium 200.8 ug/L 2 3.3 8 Cobalt 200.7 ug/L 2 1.1 20 Copper 200.8 ug/L 2 0.96 4 Iron 200.7 ug/L 2 32 200 Lead 200.8 ug/L 2 0.73 2 Magnesium 200.7 ug/L 50 540 10,000 Manganese 200.7 ug/L 2 0.51 20 Mercury 1631E ng/L 10 2.41 5.05 
A-26 

ND – 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, Dickerson 

Analyte Method Units

Dilution

Value

SampleSpecific MDL Sample- Specific QL 

Molybdenum 200.7 ug/L 2 1.6 40 Nickel 200.8 ug/L 2 0.89 4 Selenium 200.8 ug/L 2 0.62 4 Silver 200.8 ug/L 2 0.59 2 Sodium 200.7 ug/L 2 180 10,000 Thallium 200.8 ug/L 2 0.47 2 Tin 200.7 ug/L 2 4.8 200 Titanium 200.7 ug/L 2 1.6 20 Vanadium 200.8 ug/L 2 1.7 10 Zinc 200.7 ug/L 2 9.1 40 Dissolved MetalsAluminum 200.7 ug/L 2 9.4 200 Antimony 200.8 ug/L 2 0.72 2 Arsenic 200.8 ug/L 2 1.2 4 Barium 200.7 ug/L 2 2.5 20 Beryllium 200.7 ug/L 2 0.71 2 Boron 200.7 ug/L 50 170 5,000 Cadmium 200.8 ug/L 2 1.2 4 Calcium 200.7 ug/L 50 1,700 10,000 Chromium 200.8 ug/L 2 3.3 8 Chromium (VI) 218.6 ug/L 5 1.96 10 Cobalt 200.7 ug/L 2 1.1 20 Copper 200.8 ug/L 2 0.96 4 Iron 200.7 ug/L 2 32 200 Lead 200.8 ug/L 2 0.73 2 Magnesium 200.7 ug/L 50 540 10,000 Manganese 200.7 ug/L 2 0.51 20 Mercury 1631E ng/L 1 0.24 0.5 Molybdenum 200.7 ug/L 2 1.6 40 
A-27 

ND – 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, Dickerson 

Analyte Method Units

Dilution

Value

SampleSpecific MDL Sample- Specific QL 

Nickel 200.8 ug/L 2 0.89 4 Selenium 200.8 ug/L 2 0.62 4 Silver 200.8 ug/L 2 0.59 2 Sodium 200.7 ug/L 2 180 10,000 Thallium 200.8 ug/L 2 0.47 2 Tin 200.7 ug/L 2 4.8 200 Titanium 200.7 ug/L 2 1.6 20 Vanadium 200.8 ug/L 2 1.7 10 Zinc 200.7 ug/L 2 9.1 40 
A-28 

ND – 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, Dickerson 

Analyte Method Units

Dilution

Value

SampleSpecific MDL Sample- Specific QL 

ClassicalsAmmonia 350.1 mg/L 1 0.055 1 Nitrate Nitrite as N 353.2 mg/L 1 0.019 0.1 Nitrogen, Total Kjeldahl 351.2 mg/L 5 0.38 5 Biochemical Oxygen Demand 5210B mg/L 1 0.3 2.5 Chemical Oxygen Demand 410.4 mg/L 2 8.1 40 Chloride 300.0 mg/L 200 51 600 Sulfate 300.0 mg/L 50 12 250 Cyanide, Total 4500 CN E mg/L 1 0.002 0.01 Total Dissolved Solids 2540C mg/L 1 47 100 Total Suspended Solids 2540D mg/L 1 1.1 4 Phosphorus, Total 365.1 mg/L 1 0.005 0.05 Total MetalsAluminum 200.7 ug/L 2 9.4 200 Antimony 200.8 ug/L 2 0.72 2 Arsenic 200.8 ug/L 2 1.2 4 Barium 200.7 ug/L 2 2.5 20 Beryllium 200.7 ug/L 2 0.71 2 Boron 200.7 ug/L 50 170 5,000 Cadmium 200.8 ug/L 2 1.2 4 Calcium 200.7 ug/L 50 1,700 10,000 Chromium 200.8 ug/L 2 3.3 8 Cobalt 200.7 ug/L 2 1.1 20 Copper 200.8 ug/L 2 0.96 4 Iron 200.7 ug/L 2 32 200 Lead 200.8 ug/L 2 0.73 2 Magnesium 200.7 ug/L 50 540 10,000 Manganese 200.7 ug/L 2 0.51 20 Mercury 1631E ng/L 2 0.48 1.01 
A-29 

ND – 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, Dickerson 

Analyte Method Units

Dilution

Value

SampleSpecific MDL Sample- Specific QL 

Molybdenum 200.7 ug/L 2 1.6 40 Nickel 200.8 ug/L 2 0.89 4 Selenium 200.8 ug/L 2 0.62 4 Silver 200.8 ug/L 2 0.59 2 Sodium 200.7 ug/L 2 180 10,000 Thallium 200.8 ug/L 2 0.47 2 Tin 200.7 ug/L 2 4.8 200 Titanium 200.7 ug/L 2 1.6 20 Vanadium 200.8 ug/L 2 1.7 10 Zinc 200.7 ug/L 2 9.1 40 Dissolved MetalsAluminum 200.7 ug/L 2 9.4 200 Antimony 200.8 ug/L 2 0.72 2 Arsenic 200.8 ug/L 2 1.2 4 Barium 200.7 ug/L 2 2.5 20 Beryllium 200.7 ug/L 2 0.71 2 Boron 200.7 ug/L 50 170 5,000 Cadmium 200.8 ug/L 2 1.2 4 Calcium 200.7 ug/L 50 1,700 10,000 Chromium 200.8 ug/L 2 3.3 8 Chromium (VI) 218.6 ug/L 5 1.96 10 Cobalt 200.7 ug/L 2 1.1 20 Copper 200.8 ug/L 2 0.96 4 Iron 200.7 ug/L 2 32 200 Lead 200.8 ug/L 2 0.73 2 Magnesium 200.7 ug/L 50 540 10,000 Manganese 200.7 ug/L 2 0.51 20 Mercury 1631E ng/L 2 0.48 1.01 Molybdenum 200.7 ug/L 2 1.6 40 
A-30 

ND – 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, Dickerson 

Analyte Method Units

Dilution

Value

SampleSpecific MDL Sample- Specific QL 

Nickel 200.8 ug/L 2 0.89 4 Selenium 200.8 ug/L 2 0.62 4 Silver 200.8 ug/L 2 0.59 2 Sodium 200.7 ug/L 2 180 10,000 Thallium 200.8 ug/L 2 0.47 2 Tin 200.7 ug/L 2 4.8 200 Titanium 200.7 ug/L 2 1.6 20 Vanadium 200.8 ug/L 2 1.7 10 Zinc 200.7 ug/L 2 9.1 40 
A-31 

ND – 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 laboratory criteria, but sample concentration is four times greater than the matrix spike amount, so control limits are 

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, Dickerson 

Analyte Method Units

Dilution

Value

SampleSpecific MDL Sample- Specific QL 

ClassicalsAmmonia 350.1 mg/L 1 0.055 1 Nitrate Nitrite as N 353.2 mg/L 1 0.019 0.1 Nitrogen, Total Kjeldahl 351.2 mg/L 5 0.38 5 Biochemical Oxygen Demand 5210B mg/L 1 0.3 2.5 Chemical Oxygen Demand 410.4 mg/L 2 8.1 40 Chloride 300.0 mg/L 200 51 600 Sulfate 300.0 mg/L 50 12 250 Cyanide, Total 4500 CN E mg/L 1 0.002 0.01 Total Dissolved Solids 2540C mg/L 1 19 40 Total Suspended Solids 2540D mg/L 1 1.1 4 Phosphorus, Total 365.1 mg/L 1 0.005 0.05 Total MetalsAluminum 200.7 ug/L 2 9.4 200 Antimony 200.8 ug/L 2 0.72 2 Arsenic 200.8 ug/L 2 1.2 4 Barium 200.7 ug/L 2 2.5 20 Beryllium 200.7 ug/L 2 0.71 2 Boron 200.7 ug/L 50 170 5,000 Cadmium 200.8 ug/L 2 1.2 4 Calcium 200.7 ug/L 50 1,700 10,000 Chromium 200.8 ug/L 2 3.3 8 Cobalt 200.7 ug/L 2 1.1 20 Copper 200.8 ug/L 2 0.96 4 Iron 200.7 ug/L 2 32 200 Lead 200.8 ug/L 2 0.73 2 Magnesium 200.7 ug/L 50 540 10,000 
A-32 

ND – 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 laboratory criteria, but sample concentration is four times greater than the matrix spike amount, so control limits are 

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, Dickerson 

Analyte Method Units

Dilution

Value

SampleSpecific MDL Sample- Specific QL 

Manganese 200.7 ug/L 2 0.51 20 Mercury 1631E ng/L 1 0.24 0.5 Molybdenum 200.7 ug/L 2 1.6 40 Nickel 200.8 ug/L 2 0.89 4 Selenium 200.8 ug/L 2 0.62 4 Silver 200.8 ug/L 2 0.59 2 Sodium 200.7 ug/L 2 180 10,000 Thallium 200.8 ug/L 2 0.47 2 Tin 200.7 ug/L 2 4.8 200 Titanium 200.7 ug/L 2 1.6 20 Vanadium 200.8 ug/L 2 1.7 10 Zinc 200.7 ug/L 2 9.1 40 Dissolved MetalsAluminum 200.7 ug/L 2 9.4 200 Antimony 200.8 ug/L 2 0.72 2 Arsenic 200.8 ug/L 2 1.2 4 Barium 200.7 ug/L 2 2.5 20 Beryllium 200.7 ug/L 2 0.71 2 Boron 200.7 ug/L 50 170 5,000 Cadmium 200.8 ug/L 2 1.2 4 Calcium 200.7 ug/L 50 1,700 10,000 Chromium 200.8 ug/L 2 3.3 8 Chromium (VI) 218.6 ug/L 5 1.96 10 Cobalt 200.7 ug/L 2 1.1 20 Copper 200.8 ug/L 2 0.96 4 Iron 200.7 ug/L 2 32 200 Lead 200.8 ug/L 2 0.73 2 
A-33 

ND – 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 laboratory criteria, but sample concentration is four times greater than the matrix spike amount, so control limits are 

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, Dickerson 

Analyte Method Units

Dilution

Value

SampleSpecific MDL Sample- Specific QL 

Magnesium 200.7 ug/L 50 540 10,000 Manganese 200.7 ug/L 2 0.51 20 Mercury 1631E ng/L 1 0.24 0.5 Molybdenum 200.7 ug/L 2 1.6 40 Nickel 200.8 ug/L 2 0.89 4 Selenium 200.8 ug/L 2 0.62 4 Silver 200.8 ug/L 2 0.59 2 Sodium 200.7 ug/L 2 180 10,000 Thallium 200.8 ug/L 2 0.47 2 Tin 200.7 ug/L 2 4.8 200 Titanium 200.7 ug/L 2 1.6 20 Vanadium 200.8 ug/L 2 1.7 10 Zinc 200.7 ug/L 2 9.1 40 
A-34 

ND – 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, Dickerson 

Analyte Method Units

Dilution

Value

SampleSpecific MDL Sample- Specific QL 

ClassicalsAmmonia 350.1 mg/L 1 0.055 1 Nitrate Nitrite as N 353.2 mg/L 1 0.019 0.1 Nitrogen, Total Kjeldahl 351.2 mg/L 5 0.38 5 Biochemical Oxygen Demand 5210B mg/L 1 0.3 2.5 Chemical Oxygen Demand 410.4 mg/L 1 4.1 20 Chloride 300.0 mg/L 200 51 600 Sulfate 300.0 mg/L 50 12 250 Cyanide, Total 4500 CN E mg/L 1 0.002 0.01 Total Dissolved Solids 2540C mg/L 1 19 40 Total Suspended Solids 2540D mg/L 1 1.1 4 Phosphorus, Total 365.1 mg/L 1 0.005 0.05 Total MetalsAluminum 200.7 ug/L 2 9.4 200 Antimony 200.8 ug/L 2 0.72 2 Arsenic 200.8 ug/L 2 1.2 4 Barium 200.7 ug/L 2 2.5 20 Beryllium 200.7 ug/L 2 0.71 2 Boron 200.7 ug/L 50 170 5,000 Cadmium 200.8 ug/L 2 1.2 4 Calcium 200.7 ug/L 50 1,700 10,000 Chromium 200.8 ug/L 2 3.3 8 Cobalt 200.7 ug/L 2 1.1 20 Copper 200.8 ug/L 2 0.96 4 Iron 200.7 ug/L 2 32 200 Lead 200.8 ug/L 2 0.73 2 Magnesium 200.7 ug/L 50 540 10,000 Manganese 200.7 ug/L 2 0.51 20 Mercury 1631E ng/L 10 2.41 5.05 
A-35 

ND – 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, Dickerson 

Analyte Method Units

Dilution

Value

SampleSpecific MDL Sample- Specific QL 

Molybdenum 200.7 ug/L 2 1.6 40 Nickel 200.8 ug/L 2 0.89 4 Selenium 200.8 ug/L 2 0.62 4 Silver 200.8 ug/L 2 0.59 2 Sodium 200.7 ug/L 2 180 10,000 Thallium 200.8 ug/L 2 0.47 2 Tin 200.7 ug/L 2 4.8 200 Titanium 200.7 ug/L 2 1.6 20 Vanadium 200.8 ug/L 2 1.7 10 Zinc 200.7 ug/L 2 9.1 40 Dissolved MetalsAluminum 200.7 ug/L 2 9.4 200 Antimony 200.8 ug/L 2 0.72 2 Arsenic 200.8 ug/L 2 1.2 4 Barium 200.7 ug/L 2 2.5 20 Beryllium 200.7 ug/L 2 0.71 2 Boron 200.7 ug/L 50 170 5,000 Cadmium 200.8 ug/L 2 1.2 4 Calcium 200.7 ug/L 50 1,700 10,000 Chromium 200.8 ug/L 2 3.3 8 Chromium (VI) 218.6 ug/L 5 1.96 10 Cobalt 200.7 ug/L 2 1.1 20 Copper 200.8 ug/L 2 0.96 4 Iron 200.7 ug/L 2 32 200 Lead 200.8 ug/L 2 0.73 2 Magnesium 200.7 ug/L 50 540 10,000 Manganese 200.7 ug/L 2 0.51 20 Mercury 1631E ng/L 1 0.24 0.5 Molybdenum 200.7 ug/L 2 1.6 40 
A-36 

ND – 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, Dickerson 

Analyte Method Units

Dilution

Value

SampleSpecific MDL Sample- Specific QL 

Nickel 200.8 ug/L 2 0.89 4 Selenium 200.8 ug/L 2 0.62 4 Silver 200.8 ug/L 2 0.59 2 Sodium 200.7 ug/L 2 180 10,000 Thallium 200.8 ug/L 2 0.47 2 Tin 200.7 ug/L 2 4.8 200 Titanium 200.7 ug/L 2 1.6 20 Vanadium 200.8 ug/L 2 1.7 10 Zinc 200.7 ug/L 2 9.1 40 
A-37 

ND – 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, Dickerson 

Analyte Method Units

Dilution

Value

SampleSpecific MDL Sample- Specific QL 

ClassicalsAmmonia 350.1 mg/L 1 0.055 1 Nitrate Nitrite as N 353.2 mg/L 10 0.19 1 Nitrogen, Total Kjeldahl 351.2 mg/L 1 0.77 10 Biochemical Oxygen Demand 5210B mg/L 1 0.3 2.5 Chemical Oxygen Demand 410.4 mg/L 2 8.1 40 Chloride 300.0 mg/L 200 51 600 Sulfate 300.0 mg/L 50 12 250 Cyanide, Total 4500 CN E mg/L 1 0.002 0.01 Total Dissolved Solids 2540C mg/L 1 19 40 Total Suspended Solids 2540D mg/L 1 1.1 4 Phosphorus, Total 365.1 mg/L 1 0.005 0.05 Total MetalsAluminum 200.7 ug/L 2 9.4 200 Antimony 200.8 ug/L 2 0.72 2 Arsenic 200.8 ug/L 2 1.2 4 Barium 200.7 ug/L 2 2.5 20 Beryllium 200.7 ug/L 2 0.71 2 Boron 200.7 ug/L 50 170 5,000 Cadmium 200.8 ug/L 2 1.2 4 Calcium 200.7 ug/L 50 1,700 10,000 Chromium 200.8 ug/L 2 3.3 8 Cobalt 200.7 ug/L 2 1.1 20 Copper 200.8 ug/L 2 0.96 4 Iron 200.7 ug/L 2 32 200 Lead 200.8 ug/L 2 0.73 2 Magnesium 200.7 ug/L 50 540 10,000 Manganese 200.7 ug/L 2 0.51 20 Mercury 1631E ng/L 20 4.83 10.1 
A-38 

ND – 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, Dickerson 

Analyte Method Units

Dilution

Value

SampleSpecific MDL Sample- Specific QL 

Molybdenum 200.7 ug/L 2 1.6 40 Nickel 200.8 ug/L 2 0.89 4 Selenium 200.8 ug/L 2 0.62 4 Silver 200.8 ug/L 2 0.59 2 Sodium 200.7 ug/L 2 180 10,000 Thallium 200.8 ug/L 2 0.47 2 Tin 200.7 ug/L 2 4.8 200 Titanium 200.7 ug/L 2 1.6 20 Vanadium 200.8 ug/L 2 1.7 10 Zinc 200.7 ug/L 2 9.1 40 Dissolved MetalsAluminum 200.7 ug/L 2 9.4 200 Antimony 200.8 ug/L 2 0.72 2 Arsenic 200.8 ug/L 2 1.2 4 Barium 200.7 ug/L 2 2.5 20 Beryllium 200.7 ug/L 2 0.71 2 Boron 200.7 ug/L 50 170 5,000 Cadmium 200.8 ug/L 2 1.2 4 Calcium 200.7 ug/L 50 1,700 10,000 Chromium 200.8 ug/L 2 3.3 8 Chromium (VI) 218.6 ug/L 5 1.96 10 Cobalt 200.7 ug/L 2 1.1 20 Copper 200.8 ug/L 2 0.96 4 Iron 200.7 ug/L 2 32 200 Lead 200.8 ug/L 2 0.73 2 Magnesium 200.7 ug/L 50 540 10,000 Manganese 200.7 ug/L 2 0.51 20 Mercury 1631E ng/L 2 0.48 1.01 Molybdenum 200.7 ug/L 2 1.6 40 
A-39 

ND – 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, Dickerson 

Analyte Method Units

Dilution

Value

SampleSpecific MDL Sample- Specific QL 

Nickel 200.8 ug/L 2 0.89 4 Selenium 200.8 ug/L 2 0.62 4 Silver 200.8 ug/L 2 0.59 2 Sodium 200.7 ug/L 2 180 10,000 Thallium 200.8 ug/L 2 0.47 2 Tin 200.7 ug/L 2 4.8 200 Titanium 200.7 ug/L 2 1.6 20 Vanadium 200.8 ug/L 2 1.7 10 Zinc 200.7 ug/L 2 9.1 40 
A-40 

ND – 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, Dickers

Analyte Method Units

Dilution

Value

SampleSpecific MDL Sample- Specific QL 

ClassicalsAmmonia 350.1 mg/L 1 0.055 1 Nitrate Nitrite as N 353.2 mg/L 1 0.019 0.1 Nitrogen, Total Kjeldahl 351.2 mg/L 5 0.38 5 Biochemical Oxygen Demand 5210B mg/L 1 0.3 2.5 Chemical Oxygen Demand 410.4 mg/L 2 8.1 40 Chloride 300.0 mg/L 200 51 600 Sulfate 300.0 mg/L 50 12 250 Cyanide, Total 4500 CN E mg/L 1 0.002 0.01 Total Dissolved Solids 2540C mg/L 1 47 100 Total Suspended Solids 2540D mg/L 1 1.1 4 Phosphorus, Total 365.1 mg/L 1 0.005 0.05 Total MetalsAluminum 200.7 ug/L 2 9.4 200 Antimony 200.8 ug/L 2 0.72 2 Arsenic 200.8 ug/L 2 1.2 4 Barium 200.7 ug/L 2 2.5 20 Beryllium 200.7 ug/L 2 0.71 2 Boron 200.7 ug/L 50 170 5,000 Cadmium 200.8 ug/L 2 1.2 4 Calcium 200.7 ug/L 50 1,700 10,000 Chromium 200.8 ug/L 2 3.3 8 Cobalt 200.7 ug/L 2 1.1 20 Copper 200.8 ug/L 2 0.96 4 Iron 200.7 ug/L 2 32 200 Lead 200.8 ug/L 2 0.73 2 Magnesium 200.7 ug/L 50 540 10,000 Manganese 200.7 ug/L 2 0.51 20 
A-41 

ND – 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, Dickers

Analyte Method Units

Dilution

Value

SampleSpecific MDL Sample- Specific QL 

Mercury 1631E ng/L 4 0.97 2.02 Molybdenum 200.7 ug/L 2 1.6 40 Nickel 200.8 ug/L 2 0.89 4 Selenium 200.8 ug/L 2 0.62 4 Silver 200.8 ug/L 2 0.59 2 Sodium 200.7 ug/L 2 180 10,000 Thallium 200.8 ug/L 2 0.47 2 Tin 200.7 ug/L 2 4.8 200 Titanium 200.7 ug/L 2 1.6 20 Vanadium 200.8 ug/L 2 1.7 10 Zinc 200.7 ug/L 2 9.1 40 Dissolved MetalsAluminum 200.7 ug/L 2 9.4 200 Antimony 200.8 ug/L 2 0.72 2 Arsenic 200.8 ug/L 2 1.2 4 Barium 200.7 ug/L 2 2.5 20 Beryllium 200.7 ug/L 2 0.71 2 Boron 200.7 ug/L 50 170 5,000 Cadmium 200.8 ug/L 2 1.2 4 Calcium 200.7 ug/L 50 1,700 10,000 Chromium 200.8 ug/L 2 3.3 8 Chromium (VI) 218.6 ug/L 5 1.96 10 Cobalt 200.7 ug/L 2 1.1 20 Copper 200.8 ug/L 2 0.96 4 Iron 200.7 ug/L 2 32 200 Lead 200.8 ug/L 2 0.73 2 Magnesium 200.7 ug/L 50 540 10,000 Manganese 200.7 ug/L 2 0.51 20 
A-42 

ND – 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, Dickers

Analyte Method Units

Dilution

Value

SampleSpecific MDL Sample- Specific QL 

Mercury 1631E ng/L 1 0.24 0.5 Molybdenum 200.7 ug/L 2 1.6 40 Nickel 200.8 ug/L 2 0.89 4 Selenium 200.8 ug/L 2 0.62 4 Silver 200.8 ug/L 2 0.59 2 Sodium 200.7 ug/L 2 180 10,000 Thallium 200.8 ug/L 2 0.47 2 Tin 200.7 ug/L 2 4.8 200 Titanium 200.7 ug/L 2 1.6 20 Vanadium 200.8 ug/L 2 1.7 10 Zinc 200.7 ug/L 2 9.1 40 
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 Blank (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)

Aluminuma 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-splitter, and two pieces of 5 

feet of #24 silicone tubing for sample collection 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 Blank (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 dissolved 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 #73 silicone tubing, T-splitter, six feet of #73 silicone 

tubing, and 15 feet of #73 silicone tubing for total and dissolved sample collection 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-48 

ND – 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 System Field Blank, Day 1 Analytical Result

Analyte Method Units 

Dilution 

Value 

SampleSpecific MDL Sample- Specific QL 

Total Metals Aluminum 200.7 ug/L 2 9.4 200 Antimony 200.8 ug/L 2 0.72 2 Arsenic 200.8 ug/L 2 1.2 4 Barium 200.7 ug/L 2 2.5 20 Beryllium 200.7 ug/L 2 0.71 2 Boron 200.7 ug/L 2 6.7 200 Cadmium 200.8 ug/L 2 1.2 4 Calcium 200.7 ug/L 2 69 400 Chromium 200.8 ug/L 2 3.3 8 Cobalt 200.7 ug/L 2 1.1 20 Copper 200.8 ug/L 2 0.96 4 Iron 200.7 ug/L 2 32 200 Lead 200.8 ug/L 2 0.73 2 Magnesium 200.7 ug/L 2 21 400 Manganese 200.7 ug/L 2 0.51 20 Mercury 1631E ng/L 1 0.24 0.5 Molybdenum 200.7 ug/L 2 1.6 40 Nickel 200.8 ug/L 2 0.89 4 Selenium 200.8 ug/L 2 0.62 4 Silver 200.8 ug/L 2 0.59 2 Sodium 200.7 ug/L 2 180 10,000 NThallium 200.8 ug/L 2 0.47 2 Tin 200.7 ug/L 2 4.8 200 Titanium 200.7 ug/L 2 1.6 20 Vanadium 200.8 ug/L 2 1.7 10 Zinc 200.7 ug/L 2 9.1 40 Dissolved Metals Aluminum 200.7 ug/L 2 9.4 200 Antimony 200.8 ug/L 2 0.72 2 Arsenic 200.8 ug/L 2 1.2 4 
A-49 

ND – 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 System Field Blank, Day 1 Analytical Result

Analyte Method Units 

Dilution 

Value 

SampleSpecific MDL Sample- Specific QL 

Barium 200.7 ug/L 2 2.5 20 Beryllium 200.7 ug/L 2 0.71 2 Boron 200.7 ug/L 2 6.7 200 Cadmium 200.8 ug/L 2 1.2 4 Calcium 200.7 ug/L 2 69 400 Chromium 200.8 ug/L 2 3.3 8 Chromium (VI) 218.6 ug/L 1 0.39 2 Cobalt 200.7 ug/L 2 1.1 20 Copper 200.8 ug/L 2 0.96 4 Iron 200.7 ug/L 2 32 200 Lead 200.8 ug/L 2 0.73 2 Magnesium 200.7 ug/L 2 21 400 Manganese 200.7 ug/L 2 0.51 20 Molybdenum 200.7 ug/L 2 1.6 40 Nickel 200.8 ug/L 2 0.89 4 Selenium 200.8 ug/L 2 0.62 4 Silver 200.8 ug/L 2 0.59 2 Sodium 200.7 ug/L 2 180 10,000 NThallium 200.8 ug/L 2 0.47 2 Tin 200.7 ug/L 2 4.8 200 Titanium 200.7 ug/L 2 1.6 20 Vanadium 200.8 ug/L 2 1.7 10 Zinc 200.7 ug/L 2 9.1 40 
A-50 

ND – 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, Dickerson 

Analyte Method Units

Dilution

Value

SampleSpecific MDL Sample- Specific QL 

Total MetalsAluminum 200.7 ug/L 2 9.4 200 NAntimony 200.8 ug/L 2 0.72 2 Arsenic 200.8 ug/L 2 1.2 4 Barium 200.7 ug/L 2 2.5 20 Beryllium 200.7 ug/L 2 0.71 2 Boron 200.7 ug/L 2 6.7 200 Cadmium 200.8 ug/L 2 1.2 4 Calcium 200.7 ug/L 2 69 400 NChromium 200.8 ug/L 2 3.3 8 Cobalt 200.7 ug/L 2 1.1 20 Copper 200.8 ug/L 2 0.96 4 Iron 200.7 ug/L 2 32 200 NLead 200.8 ug/L 2 0.73 2 Magnesium 200.7 ug/L 2 21 400 NManganese 200.7 ug/L 2 0.51 20 Mercury 1631E ng/L 1 0.24 0.5 Molybdenum 200.7 ug/L 2 1.6 40 Nickel 200.8 ug/L 2 0.89 4 Selenium 200.8 ug/L 2 0.62 4 Silver 200.8 ug/L 2 0.59 2 Sodium 200.7 ug/L 2 180 10,000 NThallium 200.8 ug/L 2 0.47 2 Tin 200.7 ug/L 2 4.8 200 NTitanium 200.7 ug/L 2 1.6 20 Vanadium 200.8 ug/L 2 1.7 10 Zinc 200.7 ug/L 2 9.1 40 Dissolved MetalsAluminum 200.7 ug/L 2 9.4 200 
A-51 

ND – 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, Dickerson 

Analyte Method Units

Dilution

Value

SampleSpecific MDL Sample- Specific QL 

Antimony 200.8 ug/L 2 0.72 2 Arsenic 200.8 ug/L 2 1.2 4 Barium 200.7 ug/L 2 2.5 20 Beryllium 200.7 ug/L 2 0.71 2 Boron 200.7 ug/L 2 6.7 200 Cadmium 200.8 ug/L 2 1.2 4 Calcium 200.7 ug/L 2 69 400 NChromium 200.8 ug/L 2 3.3 8 Chromium (VI) 218.6 ug/L 1 0.39 2 Cobalt 200.7 ug/L 2 1.1 20 Copper 200.8 ug/L 2 0.96 4 Iron 200.7 ug/L 2 32 200 NLead 200.8 ug/L 2 0.73 2 Magnesium 200.7 ug/L 2 21 400 NManganese 200.7 ug/L 2 0.51 20 Molybdenum 200.7 ug/L 2 1.6 40 Nickel 200.8 ug/L 2 0.89 4 Selenium 200.8 ug/L 2 0.62 4 Silver 200.8 ug/L 2 0.59 2 Sodium 200.7 ug/L 2 180 10,000 NThallium 200.8 ug/L 2 0.47 2 Tin 200.7 ug/L 2 4.8 200 NTitanium 200.7 ug/L 2 1.6 20 Vanadium 200.8 ug/L 2 1.7 10 Zinc 200.7 ug/L 2 9.1 40 
A-52 

ND – 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, Dickerson 

Analyte Method Units

Dilution

Value

SampleSpecific MDL Sample- Specific QL Concentr

Total MetalsMercury 1631E ng/L 1 0.24 0.5 ND (0.5) 
A-53 

ND – 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, Dickerson 

Analyte Method Units

Dilution

Value

SampleSpecific MDL Sample- Specific QL Con

Total MetalsMercury 1631E ng/L 1 0.24 0.5 ND (0.5) 
A-54 

ND – 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, Dickerson 

Analyte Method Units

Dilution

Value

SampleSpecific MDL Sample- Specific QL Concentra

Total MetalsMercury 1631E ng/L 1 0.24 0.5 ND (0.5) 
A-55 

ND – 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, Dickerson 

Analyte Method Units

Dilution

Value

SampleSpecific MDL Sample- Specific QL 

Total MetalsAluminum 200.7 ug/L 2 9.4 200 NAntimony 200.8 ug/L 2 0.72 2 Arsenic 200.8 ug/L 2 1.2 4 Barium 200.7 ug/L 2 2.5 20 Beryllium 200.7 ug/L 2 0.71 2 Boron 200.7 ug/L 2 6.7 200 Cadmium 200.8 ug/L 2 1.2 4 Calcium 200.7 ug/L 2 69 400 NChromium 200.8 ug/L 2 3.3 8 Cobalt 200.7 ug/L 2 1.1 20 Copper 200.8 ug/L 2 0.96 4 Iron 200.7 ug/L 2 32 200 NLead 200.8 ug/L 2 0.73 2 Magnesium 200.7 ug/L 2 21 400 NManganese 200.7 ug/L 2 0.51 20 Mercury 1631E ng/L 1 0.24 0.5 Molybdenum 200.7 ug/L 2 1.6 40 Nickel 200.8 ug/L 2 0.89 4 Selenium 200.8 ug/L 2 0.62 4 Silver 200.8 ug/L 2 0.59 2 Sodium 200.7 ug/L 2 180 10,000 NThallium 200.8 ug/L 2 0.47 2 Tin 200.7 ug/L 2 4.8 200 NTitanium 200.7 ug/L 2 1.6 20 Vanadium 200.8 ug/L 2 1.7 10 Zinc 200.7 ug/L 2 9.1 40 Dissolved MetalsAluminum 200.7 ug/L 2 9.4 200 N
A-56 

ND – 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, Dickerson 

Analyte Method Units

Dilution

Value

SampleSpecific MDL Sample- Specific QL 

Antimony 200.8 ug/L 2 0.72 2 Arsenic 200.8 ug/L 2 1.2 4 Barium 200.7 ug/L 2 2.5 20 Beryllium 200.7 ug/L 2 0.71 2 Boron 200.7 ug/L 2 6.7 200 Cadmium 200.8 ug/L 2 1.2 4 Calcium 200.7 ug/L 2 69 400 NChromium 200.8 ug/L 2 3.3 8 Chromium (VI) 218.6 ug/L 1 0.39 2 Cobalt 200.7 ug/L 2 1.1 20 Copper 200.8 ug/L 2 0.96 4 Iron 200.7 ug/L 2 32 200 Lead 200.8 ug/L 2 0.73 2 Magnesium 200.7 ug/L 2 21 400 NManganese 200.7 ug/L 2 0.51 20 Molybdenum 200.7 ug/L 2 1.6 40 Nickel 200.8 ug/L 2 0.89 4 Selenium 200.8 ug/L 2 0.62 4 Silver 200.8 ug/L 2 0.59 2 Sodium 200.7 ug/L 2 180 10,000 NThallium 200.8 ug/L 2 0.47 2 Tin 200.7 ug/L 2 4.8 200 NTitanium 200.7 ug/L 2 1.6 20 Vanadium 200.8 ug/L 2 1.7 10 Zinc 200.7 ug/L 2 9.1 40 
A-57 

ND – 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, Dickerson 

Analyte Method Units

Dilution

Value

SampleSpecific MDL Sample- Specific QL Concentra

Total MetalsMercury 1631E ng/L 1 0.24 0.5 ND (0.5) 
A-58 

ND – 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, Dickerson 

Analyte Method Units

Dilution

Value

SampleSpecific MDL Sample- Specific QL Concentra

Total MetalsMercury 1631E ng/L 1 0.24 0.5 ND (0.5) 
A-59 

ND – 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, Dickerson 

Analyte Method Units

Dilution

Value

SampleSpecific MDL Sample- Specific QL Concen

Total MetalsMercury 1631E ng/L 1 0.24 0.5 ND (0.5
Appendix B 

DATA REVIEW NARRATIVES 
Appendix C 

PICTURES FROM THE SAMPLING EPISODE 
Figure C-1. Sampler Working Inside a “Cleanbox” 
Figure C-2. Sample Set Up at the Influent to the FGD Wastewater T
Figure C-3. Composite Sample Collection Set Up at the Influent to 
Figure C-4. Composite Sample Collection Set Up at the Effluent from