## February 10, 2014
Submitted Electronically

Mr. Ronald Jordan Office of Water, Engineeri ng and Analysis Division United States Environmental Protection Agency 1200 Pennsylvania Avenue, N.W. Mail Code: 4303T Washington, DC 20460

RE: S TEAM 

## E LECTRIC 

## E FFLUENT 

## L IMITATIONS 

## G UIDELINES 

## (ELG) R ULEMAKING 

## A DDITIONAL 

## I NFORMATION TO 

## S UPPORT 

## W E 

## E NERGIES 

## C OMMENTS 

## : P LEASANT 

## P RAIRIE 

## P OWER 

## P LANT 

## FGD W ASTEWATER 

## C HARACTERIZATION AND 

## T REATMENT 

## P ERFORMANCE



## Dear Mr. Jordan:
We received your letter dated January 17, 2014, request ing additional information with respect to flue gas desulfurization (FGD) wastewater characterization and treatment performance at We Energies Pleasant Prairie Power Plant (Pleasant Prairie). As you recall, we submitted substantial data and supplemental information for Pleasant Pr airie’s FGD chemical pr ecipitation wastewater treatment system as part of our comments on the United States Environmental Protection Agency’s (EPA) proposed rule to revise technol ogy-based effluent limita tions guidelines (ELG) and standards for the steam electric power gene rating point source category (see We Energies Comments on EPA Proposed Effluent Limita tions Guidelines, September 20, 2013). Pleasant Prairie solely burns subbituminous coal, and actual operating data reveal that Pleasant Prairie cannot consistently meet the proposed arsenic and mercury limitations associated with EPA’s proposed chemical precipitation t echnology option. This is partic ularly important because the limits derived for arsenic and mercury are carrie d over and used as the limits for the chemical precipitation plus biological tr eatment technology option. We reiterate that EPA should recalculate the proposed limitati ons including data from a plan t solely burning subbituminous coal. Below are our responses to your questions.

1. Please explain why there are no arsenic data for the Pleasant Prairie Power Plant for the “Reaction Tank #1 Influent” after November 2009, or for “FGD WWTS Effluent – SP 102” for the time period between November 18, 2009 and January 4, 2013. EPA requests that We Energies provide data associated with these sampling locations for the specific ti me period, if available.
All available arsenic data for the two specified sampling points representing the influent to and effluent from the Pleasant Prairie FGD chemical precipitation wastewater treatment system were submitted to the EPA as part of We Energies ELG comments. We Energies 231 W. Michigan Street Milwaukee, WI 53203
www.we-energies.com

## Mr. Ronald Jordan February 10, 2014 Page | 2



## Reaction Tank #1 Influent Pleasant Prairie’s Wisconsin Pollutant Discharge Elimination System (WPDES) Permit (WPDES Permit No. WI-0043583-06-1 ) does not require arsenic monitoring at the influent to the FGD wastewater treatment system. Therefore, all data collected at the Reaction Tank #1 Influent for other purposes (e.g., wastewater treatment plant performance test results, research projects, etc.), were provide d to EPA as part of ELG comments submitted by We Energies. No additional data representing the influent to the FGD wastewater treatment system have been collected since November 2009.

FGD WWTS Effluent – SP 102 The WPDES Permit required a monitoring scan of various parameters to be conducted at the effluent from the FGD wastewater treat ment system (Sampling Point 102) once the FGD system became operational (see WPDES Permit No. WI-0043583-06-1, Permit Condition 4.3). The monitoring scan, including an analysis for Total Recoverable Arsenic, was conducted on November 13, 2007, and results were submitted to the Wisconsin Department of Natural Resources. This data was included as part of the We Energies ELG comments submittal. The WPDES Permit doe s not require any additional arsenic monitoring of the effluent from th e FGD wastewater treatment system. 1 

## The rest of the data included as part of the We Energies ELG comments submittal was collected for other purposes . A split sample was collected on November 18, 2009 during an EPA/UWAG sampling event. Additional samples were collected at Sampling Point 102 from January 2013 – April 2013 to support development of an Application for a Variance of the Anticipated Arsenic Limitation at Outfall 001. This data was collected to satisfy the variance application re quirements specified in s. NR 200.22,Wisconsin Administrative Code, Information to be Included in an Application for a Variance.
“A permittee applying for a variance shall supply the following information... Results of monitoring data for the pollutant for which the permittee is seeking a variance which represents the past and current levels of effluent quality.” s. NR 200.22(1)(e), Wis. Adm. Code (emphasis added)

Therefore, all data collected at the FGD WWTS Effluent – SP 102 were provided to EPA as part of We Energies ELG comments. No additional data represen ting the effluent from the FGD wastewater treatment pl ant at that sampling point have been collected during these “gap” periods or since April 2013.

2. EPA requests that We Energies provide al l available existing data for arsenic and mercury representing the influent to and effl uent from Pleasant Prairie Power Plant’s

1 

## Total Recoverable Arsenic is required to be monitored monthly at either Sampling Point 102 (effluent from the FGD chemical precipitation wastewater treatment system) or Outfall 001 (combined discharge of all internal sampling points and cooling tower blowdown to Lake Mich igan). We Energies made the decision to monitor arsenic at Outfall 001 and the data have been submitted to the Wisconsin Department of Natural Resources on monthly Discharge Monitoring Reports.

## Mr. Ronald Jordan February 10, 2014 Page | 3


## chemical precipitation system for FGD wastewater, for the period January 2012 through December 2013, that have not already been submitted to EPA. Please also provide the supplemental information for th ese data described in Attachment 1.
As discussed previously, all available existing arsenic data for the specified sampling points representing the influent to and effluent from Pleas ant Prairie’s FGD wastewater treatment system have already been provided to the EPA as part of We Energies ELG comments submittal. Additional data repres enting the arsenic concentration at the secondary clarifier effluent ar e included in Atta chment 1. The supplemental information for these data is included in Enclosure I.
Additional mercury data is available charac terizing Pleasant Prairi e’s FGD wastewater treatment system effluent because the WPDES permit requires mercury samples to be collected twice a week at Sampling Point 102 to demonstrate compliance with the 1.5 μ g/L (1500 ng/L) best professional judgment limit. The We Energies ELG comments submittal included all available mercury data from November 7, 2007 through July 24, 2013. All available mercury data from Sampling Point 102 that were not already submitted to EPA, which includes samples from July 31, 2013 – December 18, 2013, are included in Attachment 1. Also included in Attachment 1 is additional mercury data for the secondary clarifier effluent. The supplemental information for these data is included in Enclosure I. No additional mercury data representing the influent to Pleasant Prairie’s FGD wastewater treatment system are available for the period January 2012 through December 2013. All available existing mercury data at this sampli ng location have already been provided to the EPA as part of We Energies ELG comments submittal.

3. Please identify the organosulfide additi ve (e.g., vendor trade name) used in the FGD wastewater treatment system corresponding to the data submitted with We Energies’ comments and to the data requested above in #1 and #2.

Since the installation of the Pleasant Prairie wastewater treatment sy stem, three types of organosulfide chemical additive have been used: TMT 15 (made by Degussa AG), Nalmet 1689 (made by Nalco Chemical Company), and Metclear MR2405 (made by GE Betz Inc.). The periods corresponding to the various organosulfide chemical additives used at the time are described in the table below:

Date Range Organosulfide Chemical Additive Used in Pleasant Prairie FGD WWTS Oct. 2007 to Apr. 2010 TMT 15 Apr. 2010 to Oct. 3, 2010 Nalmet 1689 Oct. 3, 2010 to Dec. 30, 2010 Metclear MR2405 Dec. 30, 2010 to Feb. 16, 2012 Nalmet 1689 Feb. 16, 2012 to Present Metclear MR2405

## Mr. Ronald Jordan February 10, 2014 Page | 4


## 4. Please provide the specifications that a re used to determine appropriate coals for use at the plant (i.e., specify the factors that limit the use of specifi c coals at the plant, such as chlorine content or sulfur content).
Pleasant Prairie is designed a nd permitted to be fueled with subbituminous coal from the Powder River Basin in Wyoming and Montana. The coal is purchased using specifications which define the allowable ranges for heating value, ash, moisture, and sulfur content. Those values are include d in the table below:

Specifications for Pleasant Prairie Subbituminous PRB Coal Heating Value (BTU/lb) 8,000 – 9,600 Ash Content (%) 3 – 8 Moisture Content (%) 20 – 35 Sulfur Content (%) 0.10 – 0.60

Additional coal quality information is reviewed when We Energies considers sourcing coal from a different mine to evaluate how other constituents will impact plant operations and to confirm that permit requirements can be met. Typical coal qualit y information for the mines supplying coal to Pleasant Prairie in 2012 and 2013 are included in Enclosure II.

5. Please provide the type and source (i.e., mine name and location) of coal used at the plant each day from January 2012 throug h December 2013. In addition, please provide the sulfur and chlorine content of the coal used at the plant for each day of this period, if available. For days where coal blending occurred, please note the percentage of each type of coal used.

Coal was delivered to Pleasant Prairi e from three mines in 2012 and 2013:

Mine Name Mine Owner Powder River Basin Coal Seam Location

Caballo Mine Peabody Energy Corporation Smith 20 miles southeast of Gillette, Wyoming Cordero Rojo Mine Cloud Peak Energy Wyodak 25 miles south of Gillette, Wyoming North Antelope Rochelle Mine Peabody Energy Corporation Wyodak-Anderson 65 miles south of Gillette, Wyoming

The coal is shipped via rail, and coal sample s are collected from each train shipment to characterize the heat content, ash, moisture, and sulf ur content.
The plant does not track the percentage of coal used from each mine on a daily basis. Coal can be fed directly from the train shipments for immediate use in the boilers, or it can be

## Mr. Ronald Jordan February 10, 2014 Page | 5


## unloaded to outdoor storage and reclaimed almo st immediately or pus hed onto the pile and commingled with the existing inventory. Therefore, we cannot provide the exact breakdown of chlorine and sulfur content from th e coal burned on a daily basis. The sulfur content of the coal from each train shipment is provided in Attachment 2.

Chlorine content is not characterized for each train shipment; however chloride content is characterized on a quarterly basis for annual ai r emission inventory calculations. A sample is collected from each train shipment and the samples representing the coal from each mine are composited and analyzed for a number of parameters, including chlo ride. The chloride content of the coal from each quarterly sample is provided in Attachment 3. Also included are the analyses for other parameters (i .e., arsenic, mercury, selenium, etc.).

6. Please provide the following information for each day within the range of sampling results that have been or a re being provided, if available: a. Chloride concentration, pH, and aver age daily oxidation-reduction potential (ORP) values within each FGD scrubber system; b. Chloride concentration, pH, and aver age daily ORP values for the influent to the FGD wastewater treatment system; and c. Electric generation output (MW-hr) for each generating unit serviced by a FGD system.

Please see Attachment 4 for the available information.
Chloride concentrations, pH values, and oxidation-reduction potential (ORP) values were provided for each FGD absorber when data were available. Data were not available on certain days for a variety of reasons (i.e., unit offline due to scheduled or forced outages, unit offline due to economi c reasons, work schedules of chemistry technicians, etc.). The chloride concen trations reported on Attachment 4 were the results of daily grab sample analyses. Samples were within an acceptable range if the chloride concentration was <15,000 mg/L. On ly one sample collect ed during the range of sampling results was higher than this maxi mum allowed value. The pH is monitored within each FGD scrubber syst em via in-line instrumentati on and should be within the range of 5.5 – 6.0 SU. A grab sample was co llected each day and analyzed for pH to verify that the instrumentation was providi ng accurate readings. The results of the daily pH grab samples were provided in A ttachment 4. There are a few outliers, but generally, the pH ma intained a steady value betw een 5.5 and 6.0 SU. Daily ORP values were available dating back to March 2013. No samples were collected prior to this date. Samples were within an acceptabl e range if the ORP value was in between 75 and 350 mV. All results were within the accep table range.
Chloride concentration, pH, a nd average daily ORP values were not available for the influent to the FGD wastewater treatment system; however, if these values were available, each would likely be very similar to the absorber data.

## Mr. Ronald Jordan February 10, 2014 Page | 6


## The gross electric generation output fo r each generating unit was specified in Attachment 4.

If you have any questions or need additional information, please contact Alison Castronovo at (414) 221-4337 or by email at alison.castronovo@we-energies.com.

Sincerely,

David M. Lee, P.E. Manager – Water Quality

Enclosures

cc: Bruce W. Ramme, Ph.D., P.E., Vice Pr esident – Environmental, We Energies Kathleen Standen, Manager – Enviro nmental Regulatory, We Energies

## Enclosure I – Supplemental Information for Addi tional Analytical Data Submittal for the Steam Electric Generating Effluent Guid elines Rulemaking, Pleasant Prairie FGD Wastewater Data

The supplemental information accompanying th e Pleasant Prairie FGD wastewater data submittal is supplied below.

Plant Survey ID (from the Questionnaire for the Steam Electric Effluent Guidelines ) : 6283

Plant Name : We Energies Pleasant Prairie Power Plant (“Pleasant Prairie”)

SE Unit IDs associated with each sample (based on responses to the Questionnaire for the Steam Electric Effluent Guidelines ): SE Unit-1 and SE Unit-2

FGD System ID associated with each sample (based on responses to the Questionnaire for the Steam Electric Effluent Guidelines ): FGD-1 and FGD-2 (Note: FGD-1 services SE Unit-1 and FGD-2 services SE Unit-2)

Type of fuel(s) burned (e.g., bituminous coal , petroleum coke) in the associated unit(s) represented by the samples and the relative co ntribution of each fuel on the days of sampling: Pleasant Prairie is a coal -fired power plant that burn s subbituminous (also known as Powder River Basin or “PRB”) coal in each of its two generating units. The plant also burns bottom and fly ash from older power plants to reclaim some of the car bon in the ash. The old ash is burned at approximately one to two percent weight of th e total fuel burned.

As described in our letter, PRB coal from th ree specific mines (Caballo Mine, Cordero Rojo Mine, and North Antelope Rochelle Mine) were delivered and used in 2012 and 2013. The plant does not track the percentage of coal used from each mine on a daily basis.

Electrical generation (MW-hrs) for each generating unit contributing to the FGD wastewater flow on the day of sample collection: See Attachment 4 for the gross electrical generation output for each generating unit.

Chemicals and dosages added to the treatmen t system, including location of injection points: Chemical additives are specified on Table 1 below.

### Table 1: PPPP FGD WWTP Chemical Additives 

## Injection Point Chemical Additive Average Dose Concentration (g/L) Average Addition Rate (gpd or lb/day) Reaction Tank #1 Hydrated Lime 1.4 670 lb/day Primary Clarifier GE Betz Polyfloc AE1703 (Polymer) 0.02 1.07 gpd Reaction Tank #2 GE Metclear MR2405 (Organosulfide) 0.048 2.43 gpd
Reaction Tank #2 Hydrochloric Acid 0.012 1.9 gpd Reaction Tank #3 Ferric Chloride 0.15 15.2 gpd Flash Mix Tank GE Betz Polyfloc AE1703 (Polymer) 0.0035 0.19 gpd

Process flow diagram of the system sampled, including identifying the specific sample locations for which data are being provided: A process flow diagram of the PPPP FGD wastewater treatment system sampled is include d as Figure 1. The specific sample points are described and identified on the process flow diagram. Additionally, the sample point descriptions are included for each sample on the spreadsheet.

Laboratory reports associated with the sampling data: The laboratory reports are enclosed as Attachment I-1.

Identification of whether any data or s upplemental information submitted to EPA is considered confidential business information: None of the data or supplemental information is considered confidential business information.

Other Comments:

All available arsenic and mercury data represen ting Pleasant Prairie’s FGD wastewater for the period January 2012 through December 2013, that have not already been submitted to EPA, are provided on Attachment 1. Data is provided, wher e available, for the following two locations:

- Internal point within the FGD Wastewater Treatment System (Secondary Clarifier Effluent);

- Effluent from the FGD Wastewat er Treatment System (SP 102).

No data representing the influent to the F GD wastewater treatment system (Reaction Tank #1 Influent) or Primary Clarif ier Effluent are available for the time frame.
Data is organized alphabetica lly (by analyte), by sampling lo cation (in chronological order through the treatment system), and by sample coll ection date (in chronolo gical order). One line is devoted to each parameter at each sampli ng location for each day. For instances when

## multiple samples were collected during the da y (e.g., results reported for mercury at SP 102 which include the collection of a sample and field duplicate), the average of the data is provided. These instances are called out on th e spreadsheet in the “Qualifier Description” column, believed to be the logical place to specify comments asso ciated with the data using EPA’s format. For calculating the averages, we used the same me thodology EPA used, as described on page 10-5 – 10-6 of the 2013 TDD. All resu lts less than the qu antification limit (i.e., the J-values and nondetects below the method detection limit) were treated as half of the sample-specific quantification limit when calculating the average.

The data reflect typical operating conditions and are representative of a properly operated chemical precipitation treatment system.

All pollutants were analyzed by the We Energies Laboratory Services (DNR Certification Number 241329000). Arsenic was analyzed usin g Analytical Method EPA 6020A, Inductively Coupled Plasma Dynamic Reaction Cell Mass Spectrometry (ICP-DRC-MS), as allowed by Chapter NR 219 of the Wisconsin Administrative Code, which specifies the analytical test methods and procedures applicable to effluent limitations for di scharges from point sources. Mercury was analyzed using Analytical Met hod EPA 245.7, as allowed by the Wisconsin DNR. A permit condition in Pleasant Prairie’s Wiscons in Pollutant Discharge Elimination System (WPDES) Permit (Permit # WI-0043583-06-1) allo ws for Analytical Method EPA 245.7 to be used for mercury monitoring.

“ 1.2.2.1 Mercury Monitoring. NOTE: Because the mercury concentration from the FGD treatment system will be at a higher co ncentration than at Outfall 001, the permittee may use a less sensitive analytical method (E PA method 245.7) for mercury analysis at Sampling Point 102, in accordance with s. NR 106.145(10)(b), Wis. Adm. Code.” 2006 PPPP Permit at 3.

The regulation specified in permit condition 1.2.2.1 is provided below.

The analytical method used shall be sensitive enough to quantify mercury concentrations in the sample or mercury concentrations down to the lowest water quality criterion found in ch. NR 105, whichever is greater. s. NR 106.145(10)(b), Wis. Adm. Code (emphasis added).

The flow rate at the sampling location at the tim e of the sample collection is accurately provided for Sampling Point 102. This value corresponds to the flow rate reported on the monthly Discharge Monitoring Reports. Th e site does not keep records of the flow rates through the internal sampling points, but generally operates the treatment plant at a steady flow rate of approximately 40 gpm. This flow rate wa s translated to 57,600 gpd, assuming 24-hour

## operation, and provided as the “f low rate at the sampling loca tion at the time of sample collection” for Secondary Clarifier Effluent. (It should be noted that the treatment plant typically does not operate for 24 continuous hours. As denoted on the Questionnaire , the treatment plant typically discharges at a rate of 40 gpm, 17 hpd, 199 dpy. Thus, if the flow was normalized to 24 hours per day and 365 days per year, the normalized flow rate would be 22,244 gpd.)E M 2008

31 VW 001 00 00 8-23-10 1211381 New Drawing Created X43666 W38401 WE7126 ONE LINE DIAGRAM
WASTE WATER TREATEMENT - 2

UNIT 31
PLEASANT PRAIRIE POWER PLANT 

### 678529

PP K 000 678529.dgn VENDOR No: RELATED DRAWINGS SB2007version01

DRAWN DATE

CHECKED DATE

APPROVED DATE INT. ORDER NO.

WO.NO

SCALE

DRAWN INT. ORDER NO. DATE WO.NO CHKD. APVD. REVISION DESCRIPTION NO. REV.

REVISION BLOCK 2 DRAWN INT. ORDER NO. DATE WO.NO CHKD. APVD. REVISION DESCRIPTION NO. REV.

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$DATE$ $TIME$WAS:

DRAWN INT. ORDER NO. DATE WO.NO CHKD. APVD. REVISION DESCRIPTION NO. REV.

REVISION BLOCK 1 R We Energies

Milwaukee, WI 53203 231 W. Michigan St

SB2010v01 DOCUMENT NO.

FILE NAME: 

### PLANT ID: 06283 PLEASANT PRAIRIE POWER PLANT D-2

TANK 2 REACTION 

### WWT-2

ACID HYDROCHLORIC
ORGANOSULFIDE

CP-2-1 TANK 1 REACTION

CP-1-1 POLYMER

TANK EQUALIZATION

EQ-P CL-P-1 CLARIFIER PRIMARY LIME

TANK 3 REACTION

CP-3-1 CL-S-1

TANKS STORAGE WASTEWATER TREATED

TANK SLUDGE HOLDING FP-1 PRESS FILTER

SUMP FILTRATE CHLORIDE FERRIC POLYMER

TANK MIX FLASH

TANK

FLOCCULATION CLARIFIER SECONDARY PH-3

ACID HYDROCHLORIC

HT DISCHARGE EFFLUENT TO TREATED SP-102

RECYC-FGDAB TO FGD ABSORBER

RECYCLE EFFLUENT TREATED

INDICATES A SAMPLING POINT TO SLUDGE DISPOSAL [LANDF] 199 dpy 17 hpd 40 gpm EFF-4 [OUTFALL 001] 199 dpy 57gpm, 12 hpd, SCRBP OVERFLOW HYDROCYCLONE SECONDARY

SLDG: 5.7 TPD DRY

## Attachment I-1: Laboratory Report s Associated with the Sampling Data

### Serial/Impact ID: 0 Sample Collection Date: 11/7/12 Collection Time : 14:35 Sample Collector: ANDERSON 

### Sample Description: P4 CKD FGD WWTP Effluent 

### Sample ID: AD61976

Parameter MDL Units Date Flag Method Analyst Result Analysis Analysis Result 

### The following are the analytical results for the sample(s) received by Laboratory Services on 11/14/12 : Report Date: Thursday, January 23, 2014

WDNR Cert # 241329000 PSB Annex A 070 From: Laboratory Services Division

P145 Robert Muehlenkamp To :

Dissolved Arsenic 0. 11 ug/L E PA 6020A MJL 9.3 12/ 11/12 Dissolved Mercury <0.2um 13 ng/L E PA 245.7 GAL 91 12/1/12 Dissolved Mercury <0.45um 13 ng/L E PA 245.7 GAL 74 12/1/12
Dissolved Selenium 13 ug/L E PA 6010C MJL 3400 11/30/12
Total Arsenic 0. 11 ug/L E PA 6020A MJL 8.6 12/ 11/12 Total Mercury 13 ng/L E PA 245.7 GAL 96 12/1/12
Total Selenium 13 ug/L E PA 6010C MJL 3300 11/30/12



### Sample Comments:

If there are any questions concerning this report, please contact Kevin Howard at (414) 221-2833.

### Serial/Impact ID: 0 Sample Collection Date: 11/9/12 Collection Time : 13:00 Sample Collector: ANDERSON 

### Sample Description: P4 CKD FGD WWTP Effluent 

### Sample ID: AD61983

Parameter MDL Units Date Flag Method Analyst Result Analysis Analysis Result 

### The following are the analytical results for the sample(s) received by Laboratory Services on 11/14/12 : Report Date: Thursday, January 23, 2014

WDNR Cert # 241329000 PSB Annex A 070 From: Laboratory Services Division

P145 Robert Muehlenkamp To :

Dissolved Arsenic 0. 11 ug/L E PA 6020A MJL 8.1 12/ 11/12 Dissolved Mercury <0.2um 13 ng/L E PA 245.7 GAL 58 12/1/12 Dissolved Mercury <0.45um 13 ng/L E PA 245.7 GAL 54 12/1/12
Dissolved Selenium 13 ug/L E PA 6010C MJL 2800 11/30/12
Total Arsenic 0. 11 ug/L E PA 6020A MJL 8.8 12/ 11/12 Total Mercury 13 ng/L E PA 245.7 GAL 67 12/1/12
Total Selenium 13 ug/L E PA 6010C MJL 2800 11/30/12



### Sample Comments:

If there are any questions concerning this report, please contact Kevin Howard at (414) 221-2833.

### Serial/Impact ID: 0 Sample Collection Date: 11/13/12 Collection Time : 07:35 Sample Collector: ANDERSON 

### Sample Description: P4 CKD FGD WWTP Effluent 

### Sample ID: AD62237

Parameter MDL Units Date Flag Method Analyst Result Analysis Analysis Result 

### The following are the analytical results for the sample(s) received by Laboratory Services on 11/20/12 : Report Date: Thursday, January 23, 2014

WDNR Cert # 241329000 PSB Annex A 070 From: Laboratory Services Division

P145 Robert Muehlenkamp To :

Dissolved Arsenic 0. 11 ug/L E PA 6020A MJL 9.7 12/19/12 Dissolved Mercury <0.2um 13 ng/L E PA 245.7 GAL 54 12/1/12 Dissolved Mercury <0.45um 13 ng/L E PA 245.7 GAL 63 12/1/12
Dissolved Selenium 13 ug/L E PA 6010C MJL 3200 12/12/12
Total Arsenic 0. 11 ug/L E PA 6020A MJL 8.9 12/19/12 Total Mercury 13 ng/L E PA 245.7 GAL 93 12/1/12
Total Selenium 13 ug/L E PA 6010C MJL 3000 12/12/12



### Sample Comments:

If there are any questions concerning this report, please contact Kevin Howard at (414) 221-2833.

### Serial/Impact ID: 0 Sample Collection Date: 11/20/12 Collection Time : 07:55 Sample Collector: ANDERSON 

### Sample Description: P4 CKD FGD WWTP Effluent 

### Sample ID: AD62441

Parameter MDL Units Date Flag Method Analyst Result Analysis Analysis Result 

### The following are the analytical results for the sample(s) received by Laboratory Services on 11/27/12 : Report Date: Thursday, January 23, 2014

WDNR Cert # 241329000 PSB Annex A 070 From: Laboratory Services Division

P145 Robert Muehlenkamp To :

Dissolved Arsenic 0. 11 ug/L E PA 6020A MJL 8.6 12/19/12 Dissolved Mercury <0.2um 13 ng/L E PA 245.7 GAL 63 12/1/12 Dissolved Mercury <0.45um 13 ng/L E PA 245.7 GAL 53 12/1/12
Dissolved Selenium 13 ug/L E PA 6010C MJL 3200 12/12/12
Total Arsenic 0. 11 ug/L E PA 6020A MJL 8.7 12/19/12 Total Mercury 13 ng/L E PA 245.7 GAL 88 12/1/12
Total Selenium 13 ug/L E PA 6010C MJL 3100 12/12/12



### Sample Comments:

If there are any questions concerning this report, please contact Kevin Howard at (414) 221-2833.

### Serial/Impact ID: 0 Sample Collection Date: 1/3/13 Collection Time : 08:08 Sample Collector: NF 

### Sample Description: P4 CKD Unit 1 FGD WWTP Effluent 

### Sample ID: AD63989

Parameter MDL Units Date Flag Method Analyst Result Analysis Analysis Result 

### The following are the analytical results for the sample(s) received by Laboratory Services on 1/18/13 : Report Date: Thursday, January 23, 2014

WDNR Cert # 241329000 PSB Annex A 070 From: Laboratory Services Division

P145 Robert Muehlenkamp To :

Dissolved Arsenic 0. 11 ug/L E PA 6020A MJL 12 2/6/13 Dissolved Mercury <0.2um 13 ng/L E PA 245.7 GAL 330 1/31/13 Dissolved Mercury <0.45um 13 ng/L E PA 245.7 GAL 300 1/31/13
Dissolved Selenium 13 ug/L E PA 6010C MJL 2800 1/26/13
Total Arsenic 0. 11 ug/L E PA 6020A MJL 14 2/6/13 Total Mercury 13 ng/L E PA 245.7 GAL 360 1/31/13
Total Selenium 13 ug/L E PA 6010C MJL 2900 1/26/13



### Sample Comments:

If there are any questions concerning this report, please contact Kevin Howard at (414) 221-2833.

### Serial/Impact ID: 0 Sample Collection Date: 1/8/13 Collection Time : 07:18 Sample Collector: NF 

### Sample Description: P4 CKD Unit 1 FGD WWTP Effluent 

### Sample ID: AD63996

Parameter MDL Units Date Flag Method Analyst Result Analysis Analysis Result 

### The following are the analytical results for the sample(s) received by Laboratory Services on 1/18/13 : Report Date: Thursday, January 23, 2014

WDNR Cert # 241329000 PSB Annex A 070 From: Laboratory Services Division

P145 Robert Muehlenkamp To :

Dissolved Arsenic 0. 11 ug/L E PA 6020A MJL 14 2/6/13 Dissolved Mercury <0.2um 13 ng/L E PA 245.7 GAL 91 1/31/13 Dissolved Mercury <0.45um 13 ng/L E PA 245.7 GAL 76 1/31/13
Dissolved Selenium 13 ug/L E PA 6010C MJL 2700 1/26/13
Total Arsenic 0. 11 ug/L E PA 6020A MJL 14 2/6/13 Total Mercury 13 ng/L E PA 245.7 GAL 82 1/31/13
Total Selenium 13 ug/L E PA 6010C MJL 2800 1/26/13



### Sample Comments:

If there are any questions concerning this report, please contact Kevin Howard at (414) 221-2833.

### Serial/Impact ID: 0 Sample Collection Date: 1/10/13 Collection Time : 06:36 Sample Collector: NF 

### Sample Description: P4 CKD Unit 1 FGD WWTP Effluent 

### Sample ID: AD64003

Parameter MDL Units Date Flag Method Analyst Result Analysis Analysis Result 

### The following are the analytical results for the sample(s) received by Laboratory Services on 1/18/13 : Report Date: Thursday, January 23, 2014

WDNR Cert # 241329000 PSB Annex A 070 From: Laboratory Services Division

P145 Robert Muehlenkamp To :

Dissolved Arsenic 0. 11 ug/L E PA 6020A MJL 14 2/6/13 Dissolved Mercury <0.2um 13 ng/L E PA 245.7 GAL 87 1/31/13 Dissolved Mercury <0.45um 13 ng/L E PA 245.7 GAL 78 1/31/13
Dissolved Selenium 13 ug/L E PA 6010C MJL 2800 1/26/13
Total Arsenic 0. 11 ug/L E PA 6020A MJL 15 2/6/13 Total Mercury 13 ng/L E PA 245.7 GAL 89 1/31/13
Total Selenium 13 ug/L E PA 6010C MJL 2800 1/26/13



### Sample Comments:

If there are any questions concerning this report, please contact Kevin Howard at (414) 221-2833.

### Serial/Impact ID: 0 Sample Collection Date: 1/30/13 Collection Time : 09:45 Sample Collector: NF 

### Sample Description: P4 CKD Unit 1 FGD WWTP Effluent 

### Sample ID: AD65488

Parameter MDL Units Date Flag Method Analyst Result Analysis Analysis Result 

### The following are the analytical results for the sample(s) received by Laboratory Services on 2/20/13 : Report Date: Thursday, January 23, 2014

WDNR Cert # 241329000 PSB Annex A 070 From: Laboratory Services Division

P145 Robert Muehlenkamp To :

Dissolved Arsenic 0. 11 ug/L E PA 6020A MJL 8.2 3/8/13 Dissolved Mercury <0.2um 11 ng/L E PA 245.7 MJL 190 2/26/13 Dissolved Mercury <0.45um 11 ng/L E PA 245.7 MJL 200 2/26/13
Dissolved Selenium 13 ug/L E PA 6010C KAV 2300 3/1/13
Total Arsenic 0. 11 ug/L E PA 6020A MJL 8.6 3/8/13 Total Mercury 11 ng/L E PA 245.7 MJL 210 2/26/13
Total Selenium 13 ug/L E PA 6010C KAV 2300 3/6/13



### Sample Comments:

If there are any questions concerning this report, please contact Kevin Howard at (414) 221-2833.

### Serial/Impact ID: 0 Sample Collection Date: 2/5/13 Collection Time : 12:35 Sample Collector: NF 

### Sample Description: P4 CKD Unit 1 FGD WWTP Effluent 

### Sample ID: AD65501

Parameter MDL Units Date Flag Method Analyst Result Analysis Analysis Result 

### The following are the analytical results for the sample(s) received by Laboratory Services on 2/20/13 : Report Date: Thursday, January 23, 2014

WDNR Cert # 241329000 PSB Annex A 070 From: Laboratory Services Division

P145 Robert Muehlenkamp To :

Dissolved Arsenic 0. 11 ug/L E PA 6020A MJL 9.0 3/8/13 Dissolved Mercury <0.2um 11 ng/L E PA 245.7 MJL 150 2/26/13 Dissolved Mercury <0.45um 11 ng/L E PA 245.7 MJL 140 2/26/13
Dissolved Selenium 13 ug/L E PA 6010C KAV 2800 3/1/13
Total Arsenic 0. 11 ug/L E PA 6020A MJL 9.6 3/8/13 Total Mercury 11 ng/L E PA 245.7 MJL 220 2/26/13
Total Selenium 13 ug/L E PA 6010C KAV 2800 3/6/13



### Sample Comments:

If there are any questions concerning this report, please contact Kevin Howard at (414) 221-2833.

### Serial/Impact ID: 0 Sample Collection Date: 2/7/13 Collection Time : 08:02 Sample Collector: NF 

### Sample Description: P4 CKD Unit 1 FGD WWTP Effluent 

### Sample ID: AD65508

Parameter MDL Units Date Flag Method Analyst Result Analysis Analysis Result 

### The following are the analytical results for the sample(s) received by Laboratory Services on 2/20/13 : Report Date: Thursday, January 23, 2014

WDNR Cert # 241329000 PSB Annex A 070 From: Laboratory Services Division

P145 Robert Muehlenkamp To :

Dissolved Arsenic 0. 11 ug/L E PA 6020A MJL 7.9 3/8/13 Dissolved Mercury <0.2um 11 ng/L E PA 245.7 MJL 110 2/26/13 Dissolved Mercury <0.45um 11 ng/L E PA 245.7 MJL 96 2/26/13
Dissolved Selenium 13 ug/L E PA 6010C KAV 2300 3/1/13
Total Arsenic 0. 11 ug/L E PA 6020A MJL 8.2 3/8/13 Total Mercury 11 ng/L E PA 245.7 MJL 150 2/26/13
Total Selenium 13 ug/L E PA 6010C KAV 2400 3/6/13



### Sample Comments:

If there are any questions concerning this report, please contact Kevin Howard at (414) 221-2833.

### Serial/Impact ID: 0 Sample Collection Date: 2/13/13 Collection Time : 12:45 Sample Collector: EA 

### Sample Description: P4 CKD Unit 1 FGD WWTP Effluent 

### Sample ID: AD65515

Parameter MDL Units Date Flag Method Analyst Result Analysis Analysis Result 

### The following are the analytical results for the sample(s) received by Laboratory Services on 2/20/13 : Report Date: Thursday, January 23, 2014

WDNR Cert # 241329000 PSB Annex A 070 From: Laboratory Services Division

P145 Robert Muehlenkamp To :

Dissolved Arsenic 0. 11 ug/L E PA 6020A MJL 6.4 3/8/13 Dissolved Mercury <0.2um 11 ng/L E PA 245.7 MJL 60 2/26/13 Dissolved Mercury <0.45um 11 ng/L E PA 245.7 MJL 57 2/26/13
Dissolved Selenium 13 ug/L E PA 6010C KAV 1700 3/1/13
Total Arsenic 0. 11 ug/L E PA 6020A MJL 6.5 3/8/13 Total Mercury 11 ng/L E PA 245.7 MJL 81 2/26/13
Total Selenium 13 ug/L E PA 6010C KAV 1700 3/6/13



### Sample Comments:

If there are any questions concerning this report, please contact Kevin Howard at (414) 221-2833.

### Serial/Impact ID: Sample Collection Date: 3/26/13 Collection Time : 09:00 Sample Collector: EA 

### Sample Description: P4 FGD WWTP Secondary Clarifier Effluent 

### Sample ID: AD66701

Parameter MDL Units Date Flag Method Analyst Result Analysis Analysis Result 

### The following are the analytical results for the sample(s) received by Laboratory Services on 3/27/13 : Report Date: Thursday, January 23, 2014

WDNR Cert # 241329000 PSB Annex A 070 From: Laboratory Services Division

A231 Elizabeth Hellman To :

Total Arsenic 0.043 ug/L E PA 6020A MJL 11 4/1/13 Total Mercury 11 ng/L E PA 245.7 MJL 180 3/28/13
Total Selenium 13 ug/L E PA 6010C KAV 2100 4/2/13



### Sample Comments:

If there are any questions concerning this report, please contact Kevin Howard at (414) 221-2833.

### Serial/Impact ID: Sample Collection Date: 7/31/13 Collection Time : 08:52 Sample Collector: BOYD 

### Sample Description: PPP P FGD WWTP Sample Pt. 102 

### Sample ID: AD71697

Parameter MDL Units Date Flag Method Analyst Result Analysis Analysis Result 

### The following are the analytical results for the sample(s) received by Laboratory Services on 8/2/13 : Report Date: Wednesday, January 29, 2014

WDNR Cert # 241329000 PSB Annex A 070 From: Laboratory Services Division

PSB Annex A231 Russ Rick To :

Total Mercury 11 ng/L E PA 245.7 MJL 41 8/14/13 Total Mercury Field Duplicate 11 ng/L E PA 245.7 MJL 37 8/14/13



### Sample Comments:
Associated method blanks (2) <mdl.



### If there are any questions concerning this report, please contact Kevin Howard at (414) 221-2833.

### Serial/Impact ID: Sample Collection Date: 8/1/13 Collection Time : 14:15 Sample Collector: BOYD 

### Sample Description: PPP P FGD WWTP Sample Pt. 102 

### Sample ID: AD71886

Parameter MDL Units Date Flag Method Analyst Result Analysis Analysis Result 

### The following are the analytical results for the sample(s) received by Laboratory Services on 8/7/13 : Report Date: Wednesday, January 29, 2014

WDNR Cert # 241329000 PSB Annex A 070 From: Laboratory Services Division

PSB Annex A231 Russ Rick To :

Total Mercury 11 ng/L E PA 245.7 MJL 39 8/14/13 Total Mercury Field Duplicate 11 ng/L E PA 245.7 MJL 45 8/14/13



### Sample Comments:
Associated method blanks (2) <mdl.



### If there are any questions concerning this report, please contact Kevin Howard at (414) 221-2833.

### Serial/Impact ID: Sample Collection Date: 8/5/13 Collection Time : 13:59 Sample Collector: BOYD 

### Sample Description: PPP P FGD WWTP Sample Pt. 102 

### Sample ID: AD71887

Parameter MDL Units Date Flag Method Analyst Result Analysis Analysis Result 

### The following are the analytical results for the sample(s) received by Laboratory Services on 8/7/13 : Report Date: Wednesday, January 29, 2014

WDNR Cert # 241329000 PSB Annex A 070 From: Laboratory Services Division

PSB Annex A231 Russ Rick To :

Total Mercury 11 ng/L E PA 245.7 MJL 52 8/14/13 Total Mercury Field Duplicate 11 ng/L E PA 245.7 MJL 39 8/14/13



### Sample Comments:
Associated method blanks (2) <mdl.



### If there are any questions concerning this report, please contact Kevin Howard at (414) 221-2833.

### Serial/Impact ID: Sample Collection Date: 8/6/13 Collection Time : 14:08 Sample Collector: BOYD 

### Sample Description: PPP P FGD WWTP Sample Pt. 102 

### Sample ID: AD71994

Parameter MDL Units Date Flag Method Analyst Result Analysis Analysis Result 

### The following are the analytical results for the sample(s) received by Laboratory Services on 8/9/13 : Report Date: Wednesday, January 29, 2014

WDNR Cert # 241329000 PSB Annex A 070 From: Laboratory Services Division

PSB Annex A231 Russ Rick To :

Total Mercury 0.45 ng/L E PA 245.7 MJL 41 8/14/13 Total Mercury Field Duplicate 0.45 ng/L E PA 245.7 MJL 29 8/14/13



### Sample Comments:
Associated method blanks (2) <mdl.



### If there are any questions concerning this report, please contact Kevin Howard at (414) 221-2833.

### Serial/Impact ID: Sample Collection Date: 9/17/13 Collection Time : 14:40 Sample Collector: PUDER 

### Sample Description: PPP P FGD WWTP Sample Pt. 102 

### Sample ID: AD73625

Parameter MDL Units Date Flag Method Analyst Result Analysis Analysis Result 

### The following are the analytical results for the sample(s) received by Laboratory Services on 9/19/13 : Report Date: Wednesday, January 29, 2014

WDNR Cert # 241329000 PSB Annex A 070 From: Laboratory Services Division

PSB Annex A231 Russ Rick To :

Total Mercury 13 ng/L E PA 245.7 MJL 460 9/25/13 Total Mercury Field Duplicate 13 ng/L E PA 245.7 MJL 470 9/25/13



### Sample Comments:
Associated method blank results: Blank1 1.61 ng/L, Blank2 1.57 ng/L.



### If there are any questions concerning this report, please contact Kevin Howard at (414) 221-2833.

### Serial/Impact ID: Sample Collection Date: 9/18/13 Collection Time : 09:15 Sample Collector: NF 

### Sample Description: PPP P FGD WWTP Sample Pt. 102 

### Sample ID: AD73626

Parameter MDL Units Date Flag Method Analyst Result Analysis Analysis Result 

### The following are the analytical results for the sample(s) received by Laboratory Services on 9/19/13 : Report Date: Wednesday, January 29, 2014

WDNR Cert # 241329000 PSB Annex A 070 From: Laboratory Services Division

PSB Annex A231 Russ Rick To :

Total Mercury 13 ng/L E PA 245.7 MJL 390 9/25/13 Total Mercury Field Duplicate 13 ng/L E PA 245.7 MJL 390 9/25/13



### Sample Comments:
Associated method blank results: Blank1 1.61 ng/L, Blank2 1.57 ng/L.



### If there are any questions concerning this report, please contact Kevin Howard at (414) 221-2833.

### Serial/Impact ID: Sample Collection Date: 9/24/13 Collection Time : 08:42 Sample Collector: NF 

### Sample Description: PPP P FGD WWTP Sample Pt. 102 

### Sample ID: AD73969

Parameter MDL Units Date Flag Method Analyst Result Analysis Analysis Result 

### The following are the analytical results for the sample(s) received by Laboratory Services on 9/26/13 : Report Date: Wednesday, January 29, 2014

WDNR Cert # 241329000 PSB Annex A 070 From: Laboratory Services Division

PSB Annex A231 Russ Rick To :

Total Mercury 13 ng/L E PA 245.7 MJL 220 10/4/13 Total Mercury Field Duplicate 13 ng/L E PA 245.7 MJL 210 10/4/13



### Sample Comments:
Associated method blank results: Blank1 0.62 ng/L, Blank2 0.88 ng/L.



### If there are any questions concerning this report, please contact Kevin Howard at (414) 221-2833.

### Serial/Impact ID: Sample Collection Date: 9/25/13 Collection Time : 08:50 Sample Collector: NF 

### Sample Description: PPP P FGD WWTP Sample Pt. 102 

### Sample ID: AD73974

Parameter MDL Units Date Flag Method Analyst Result Analysis Analysis Result 

### The following are the analytical results for the sample(s) received by Laboratory Services on 9/26/13 : Report Date: Wednesday, January 29, 2014

WDNR Cert # 241329000 PSB Annex A 070 From: Laboratory Services Division

PSB Annex A231 Russ Rick To :

Total Mercury 13 ng/L E PA 245.7 MJL 190 10/4/13 Total Mercury Field Duplicate 13 ng/L E PA 245.7 MJL 170 10/4/13



### Sample Comments:
Associated method blank results: Blank1 0.62 ng/L, Blank2 0.88 ng/L.



### If there are any questions concerning this report, please contact Kevin Howard at (414) 221-2833.

### Serial/Impact ID: Sample Collection Date: 10/1/13 Collection Time : 09:00 Sample Collector: NF 

### Sample Description: PPP P FGD WWTP Sample Pt. 102 

### Sample ID: AD74497

Parameter MDL Units Date Flag Method Analyst Result Analysis Analysis Result 

### The following are the analytical results for the sample(s) received by Laboratory Services on 10/4/13 : Report Date: Wednesday, January 29, 2014

WDNR Cert # 241329000 PSB Annex A 070 From: Laboratory Services Division

PSB Annex A231 Russ Rick To :

Total Mercury 18 ng/L E PA 245.7 MJL 170 10/ 11/13 Total Mercury Field Duplicate 18 ng/L E PA 245.7 MJL 160 10/ 11/13



### Sample Comments:
Associated method blank results: Blank1 1.1 ng/L, Blank2 0.92 ng/L.



### If there are any questions concerning this report, please contact Kevin Howard at (414) 221-2833.

### Serial/Impact ID: Sample Collection Date: 10/3/13 Collection Time : 06:43 Sample Collector: NF 

### Sample Description: PPP P FGD WWTP Sample Pt. 102 

### Sample ID: AD74499

Parameter MDL Units Date Flag Method Analyst Result Analysis Analysis Result 

### The following are the analytical results for the sample(s) received by Laboratory Services on 10/4/13 : Report Date: Wednesday, January 29, 2014

WDNR Cert # 241329000 PSB Annex A 070 From: Laboratory Services Division

PSB Annex A231 Russ Rick To :

Total Mercury 18 ng/L E PA 245.7 MJL 150 10/ 11/13 Total Mercury Field Duplicate 18 ng/L E PA 245.7 MJL 150 10/ 11/13



### Sample Comments:
Associated method blank results: Blank1 1.1 ng/L, Blank2 0.92 ng/L.



### If there are any questions concerning this report, please contact Kevin Howard at (414) 221-2833.

### Serial/Impact ID: Sample Collection Date: 10/8/13 Collection Time : 06:47 Sample Collector: NF 

### Sample Description: PPP P FGD WWTP Sample Pt. 102 

### Sample ID: AD74716

Parameter MDL Units Date Flag Method Analyst Result Analysis Analysis Result 

### The following are the analytical results for the sample(s) received by Laboratory Services on 10/9/13 : Report Date: Wednesday, January 29, 2014

WDNR Cert # 241329000 PSB Annex A 070 From: Laboratory Services Division

PSB Annex A231 Russ Rick To :

Total Mercury 18 ng/L E PA 245.7 MJL 74 10/ 11/13 Total Mercury Field Duplicate 18 ng/L E PA 245.7 MJL 70 10/ 11/13



### Sample Comments:
Associated method blank results: Blank1 1.1 ng/L, Blank2 0.92 ng/L.



### If there are any questions concerning this report, please contact Kevin Howard at (414) 221-2833.

### Serial/Impact ID: Sample Collection Date: 10/10/13 Collection Time : 07:14 Sample Collector: NF 

### Sample Description: PPP P FGD WWTP Sample Pt. 102 

### Sample ID: AD74815

Parameter MDL Units Date Flag Method Analyst Result Analysis Analysis Result 

### The following are the analytical results for the sample(s) received by Laboratory Services on 10/ 11/13 : Report Date: Wednesday, January 29, 2014

WDNR Cert # 241329000 PSB Annex A 070 From: Laboratory Services Division

PSB Annex A231 Russ Rick To :

Total Mercury 18 ng/L E PA 245.7 MJL 96 10/16/13 Total Mercury Field Duplicate 18 ng/L E PA 245.7 MJL 80 10/16/13



### Sample Comments:
Associated method blank results: Blank1 1.2 ng/L, Blank2 1.0 ng/L.



### If there are any questions concerning this report, please contact Kevin Howard at (414) 221-2833.

### Serial/Impact ID: Sample Collection Date: 10/16/13 Collection Time : 10:15 Sample Collector: NF 

### Sample Description: PPP P FGD WWTP Sample Pt. 102 

### Sample ID: AD74961

Parameter MDL Units Date Flag Method Analyst Result Analysis Analysis Result 

### The following are the analytical results for the sample(s) received by Laboratory Services on 10/17/13 : Report Date: Wednesday, January 29, 2014

WDNR Cert # 241329000 PSB Annex A 070 From: Laboratory Services Division

PSB Annex A231 Russ Rick To :

Total Mercury 18 ng/L E PA 245.7 MJL 350 10/23/13 Total Mercury Field Duplicate 18 ng/L E PA 245.7 MJL 280 10/23/13



### Sample Comments:
Associated method blank results (2) <mdl.



### If there are any questions concerning this report, please contact Kevin Howard at (414) 221-2833.

### Serial/Impact ID: Sample Collection Date: 10/17/13 Collection Time : 07:35 Sample Collector: NFOUCAU LT 

### Sample Description: PPP P FGD WWTP Sample Pt. 102 

### Sample ID: AD75008

Parameter MDL Units Date Flag Method Analyst Result Analysis Analysis Result 

### The following are the analytical results for the sample(s) received by Laboratory Services on 10/18/13 : Report Date: Wednesday, January 29, 2014

WDNR Cert # 241329000 PSB Annex A 070 From: Laboratory Services Division

PSB Annex A231 Russ Rick To :

Total Mercury 18 ng/L E PA 245.7 MJL 200 10/23/13 Total Mercury Field Duplicate 18 ng/L E PA 245.7 MJL 270 10/23/13



### Sample Comments:
Associated method blank results (2) <mdl.



### If there are any questions concerning this report, please contact Kevin Howard at (414) 221-2833.

### Serial/Impact ID: Sample Collection Date: 10/23/13 Collection Time : 09:22 Sample Collector: NF 

### Sample Description: PPP P FGD WWTP Sample Pt. 102 

### Sample ID: AD75220

Parameter MDL Units Date Flag Method Analyst Result Analysis Analysis Result 

### The following are the analytical results for the sample(s) received by Laboratory Services on 10/24/13 : Report Date: Wednesday, January 29, 2014

WDNR Cert # 241329000 PSB Annex A 070 From: Laboratory Services Division

PSB Annex A231 Russ Rick To :

Total Mercury 18 ng/L E PA 245.7 MJL 240 10/28/13 Total Mercury Field Duplicate 18 ng/L E PA 245.7 MJL 240 10/28/13



### Sample Comments:
Associated method blank results (2) <mdl.



### If there are any questions concerning this report, please contact Kevin Howard at (414) 221-2833.

### Serial/Impact ID: Sample Collection Date: 10/24/13 Collection Time : 07:40 Sample Collector: NF 

### Sample Description: PPP P FGD WWTP Sample Pt. 102 

### Sample ID: AD75264

Parameter MDL Units Date Flag Method Analyst Result Analysis Analysis Result 

### The following are the analytical results for the sample(s) received by Laboratory Services on 10/25/13 : Report Date: Wednesday, January 29, 2014

WDNR Cert # 241329000 PSB Annex A 070 From: Laboratory Services Division

PSB Annex A231 Russ Rick To :

Total Mercury 18 ng/L E PA 245.7 MJL 230 10/28/13 Total Mercury Field Duplicate 18 ng/L E PA 245.7 MJL 180 10/28/13



### Sample Comments:
Associated method blank results (2) <mdl.



### If there are any questions concerning this report, please contact Kevin Howard at (414) 221-2833.

### Serial/Impact ID: Sample Collection Date: 10/29/13 Collection Time : 08:19 Sample Collector: NF 

### Sample Description: PPP P FGD WWTP Sample Pt. 102 

### Sample ID: AD75471

Parameter MDL Units Date Flag Method Analyst Result Analysis Analysis Result 

### The following are the analytical results for the sample(s) received by Laboratory Services on 11/1/13 : Report Date: Wednesday, January 29, 2014

WDNR Cert # 241329000 PSB Annex A 070 From: Laboratory Services Division

PSB Annex A231 Russ Rick To :

Total Mercury 18 ng/L E PA 245.7 MJL 210 11/6/13 Total Mercury Field Duplicate 0.72 ng/L E PA 245.7 MJL 110 11/6/13



### Sample Comments:
Associated method blank results: Blank1 <0.072 ng/L, Blank2 0.87 ng/L.



### If there are any questions concerning this report, please contact Kevin Howard at (414) 221-2833.

### Serial/Impact ID: Sample Collection Date: 10/31/13 Collection Time : 12:40 Sample Collector: NF 

### Sample Description: PPP P FGD WWTP Sample Pt. 102 

### Sample ID: AD75496

Parameter MDL Units Date Flag Method Analyst Result Analysis Analysis Result 

### The following are the analytical results for the sample(s) received by Laboratory Services on 11/5/13 : Report Date: Wednesday, January 29, 2014

WDNR Cert # 241329000 PSB Annex A 070 From: Laboratory Services Division

PSB Annex A231 Russ Rick To :

Total Mercury 18 ng/L E PA 245.7 MJL 150 11/6/13 Total Mercury Field Duplicate 18 ng/L E PA 245.7 MJL 180 11/6/13



### Sample Comments:
Associated method blank results: Blank1 <0.072 ng/L, Blank2 0.87 ng/L.



### If there are any questions concerning this report, please contact Kevin Howard at (414) 221-2833.

### Serial/Impact ID: Sample Collection Date: 11/5/13 Collection Time : 13:35 Sample Collector: ANDERSON 

### Sample Description: PPP P FGD WWTP Sample Pt. 102 

### Sample ID: AD75649

Parameter MDL Units Date Flag Method Analyst Result Analysis Analysis Result 

### The following are the analytical results for the sample(s) received by Laboratory Services on 11/7/13 : Report Date: Wednesday, January 29, 2014

WDNR Cert # 241329000 PSB Annex A 070 From: Laboratory Services Division

PSB Annex A231 Russ Rick To :

Total Mercury 18 ng/L E PA 245.7 MJL 120 11/19/13 Total Mercury Field Duplicate 18 ng/L E PA 245.7 MJL 130 11/19/13



### Sample Comments:
Associated method blank results: Blank1 <0.72, Blank2 0.98 ng/L.



### If there are any questions concerning this report, please contact Kevin Howard at (414) 221-2833.

### Serial/Impact ID: Sample Collection Date: 11/6/13 Collection Time : 09: 11 Sample Collector: NF 

### Sample Description: PPP P FGD WWTP Sample Pt. 102 

### Sample ID: AD75650

Parameter MDL Units Date Flag Method Analyst Result Analysis Analysis Result 

### The following are the analytical results for the sample(s) received by Laboratory Services on 11/7/13 : Report Date: Wednesday, January 29, 2014

WDNR Cert # 241329000 PSB Annex A 070 From: Laboratory Services Division

PSB Annex A231 Russ Rick To :

Total Mercury 18 ng/L E PA 245.7 MJL 71 11/19/13 Total Mercury Field Duplicate 18 ng/L E PA 245.7 MJL 78 11/19/13



### Sample Comments:
Associated method blank results: Blank1 <0.72, Blank2 0.98 ng/L.



### If there are any questions concerning this report, please contact Kevin Howard at (414) 221-2833.

### Serial/Impact ID: Sample Collection Date: 11/12/13 Collection Time : 15:15 Sample Collector: PUDER 

### Sample Description: PPP P FGD WWTP Sample Pt. 102 

### Sample ID: AD75958

Parameter MDL Units Date Flag Method Analyst Result Analysis Analysis Result 

### The following are the analytical results for the sample(s) received by Laboratory Services on 11/14/13 : Report Date: Wednesday, January 29, 2014

WDNR Cert # 241329000 PSB Annex A 070 From: Laboratory Services Division

PSB Annex A231 Russ Rick To :

Total Mercury 18 ng/L E PA 245.7 MJL 71 11/19/13 Total Mercury Field Duplicate 18 ng/L E PA 245.7 MJL 83 11/19/13



### Sample Comments:
Associated method blank results: Blank1 <0.72, Blank2 0.98 ng/L.



### If there are any questions concerning this report, please contact Kevin Howard at (414) 221-2833.

### Serial/Impact ID: Sample Collection Date: 11/13/13 Collection Time : 13:25 Sample Collector: ANDERSON 

### Sample Description: PPP P FGD WWTP Sample Pt. 102 

### Sample ID: AD76000

Parameter MDL Units Date Flag Method Analyst Result Analysis Analysis Result 

### The following are the analytical results for the sample(s) received by Laboratory Services on 11/15/13 : Report Date: Wednesday, January 29, 2014

WDNR Cert # 241329000 PSB Annex A 070 From: Laboratory Services Division

PSB Annex A231 Russ Rick To :

Total Mercury 18 ng/L E PA 245.7 MJL 73 11/19/13 Total Mercury Field Duplicate 18 ng/L E PA 245.7 MJL 72 11/19/13



### Sample Comments:
Associated method blank results: Blank1 <0.72, Blank2 0.98 ng/L.



### If there are any questions concerning this report, please contact Kevin Howard at (414) 221-2833.

### Serial/Impact ID: Sample Collection Date: 11/20/13 Collection Time : 13:25 Sample Collector: ANDERSON 

### Sample Description: PPP P FGD WWTP Sample Pt. 102 

### Sample ID: AD76253

Parameter MDL Units Date Flag Method Analyst Result Analysis Analysis Result 

### The following are the analytical results for the sample(s) received by Laboratory Services on 11/22/13 : Report Date: Wednesday, January 29, 2014

WDNR Cert # 241329000 PSB Annex A 070 From: Laboratory Services Division

PSB Annex A231 Russ Rick To :

Total Mercury 18 ng/L E PA 245.7 MJL 110 11/26/13 Total Mercury Field Duplicate 18 ng/L E PA 245.7 MJL 120 11/26/13



### Sample Comments:
Associated method blank results: Blank1 0.91 ng/L, Blank2 0.78 ng/L.



### If there are any questions concerning this report, please contact Kevin Howard at (414) 221-2833.

### Serial/Impact ID: Sample Collection Date: 11/19/13 Collection Time : 13:15 Sample Collector: ANDERSON 

### Sample Description: PPP P FGD WWTP Sample Pt. 102 

### Sample ID: AD76256

Parameter MDL Units Date Flag Method Analyst Result Analysis Analysis Result 

### The following are the analytical results for the sample(s) received by Laboratory Services on 11/22/13 : Report Date: Wednesday, January 29, 2014

WDNR Cert # 241329000 PSB Annex A 070 From: Laboratory Services Division

PSB Annex A231 Russ Rick To :

Total Mercury 18 ng/L E PA 245.7 MJL 120 11/26/13 Total Mercury Field Duplicate 18 ng/L E PA 245.7 MJL 100 11/26/13



### Sample Comments:
Associated method blank results: Blank1 0.91 ng/L, Blank2 0.78 ng/L.



### If there are any questions concerning this report, please contact Kevin Howard at (414) 221-2833.

### Serial/Impact ID: Sample Collection Date: 11/25/13 Collection Time : 14:05 Sample Collector: ANDERSON 

### Sample Description: PPP P FGD WWTP Sample Pt. 102 

### Sample ID: AD76436

Parameter MDL Units Date Flag Method Analyst Result Analysis Analysis Result 

### The following are the analytical results for the sample(s) received by Laboratory Services on 11/27/13 : Report Date: Wednesday, January 29, 2014

WDNR Cert # 241329000 PSB Annex A 070 From: Laboratory Services Division

PSB Annex A231 Russ Rick To :

Total Mercury 18 ng/L E PA 245.7 MJL 90 12/9/13 Total Mercury Field Duplicate 18 ng/L E PA 245.7 MJL 87 12/9/13



### Sample Comments:
Associated Method Blank results: Blank1 <mdl; Blank2 0.91 ng/L.



### If there are any questions concerning this report, please contact Kevin Howard at (414) 221-2833.

### Serial/Impact ID: Sample Collection Date: 11/26/13 Collection Time : 09:20 Sample Collector: ANDERSON 

### Sample Description: PPP P FGD WWTP Sample Pt. 102 

### Sample ID: AD76437

Parameter MDL Units Date Flag Method Analyst Result Analysis Analysis Result 

### The following are the analytical results for the sample(s) received by Laboratory Services on 11/27/13 : Report Date: Wednesday, January 29, 2014

WDNR Cert # 241329000 PSB Annex A 070 From: Laboratory Services Division

PSB Annex A231 Russ Rick To :

Total Mercury 18 ng/L E PA 245.7 MJL 80 12/9/13 Total Mercury Field Duplicate 18 ng/L E PA 245.7 MJL 70 12/9/13



### Sample Comments:
Associated Method Blank results: Blank1 <mdl; Blank2 0.91 ng/L.



### If there are any questions concerning this report, please contact Kevin Howard at (414) 221-2833.

### Serial/Impact ID: Sample Collection Date: 12/3/13 Collection Time : 13:35 Sample Collector: ANDERSON 

### Sample Description: PPP P FGD WWTP Sample Pt. 102 

### Sample ID: AD76692

Parameter MDL Units Date Flag Method Analyst Result Analysis Analysis Result 

### The following are the analytical results for the sample(s) received by Laboratory Services on 12/5/13 : Report Date: Wednesday, January 29, 2014

WDNR Cert # 241329000 PSB Annex A 070 From: Laboratory Services Division

PSB Annex A231 Russ Rick To :

Total Mercury 18 ng/L E PA 245.7 MJL 60 12/9/13 Total Mercury Field Duplicate 18 ng/L E PA 245.7 MJL 61 12/9/13



### Sample Comments:
Associated Method Blank results: Blank1 <mdl; Blank2 0.91 ng/L.



### If there are any questions concerning this report, please contact Kevin Howard at (414) 221-2833.

### Serial/Impact ID: Sample Collection Date: 12/4/13 Collection Time : 12:45 Sample Collector: ANDERSON 

### Sample Description: PPP P FGD WWTP Sample Pt. 102 

### Sample ID: AD76755

Parameter MDL Units Date Flag Method Analyst Result Analysis Analysis Result 

### The following are the analytical results for the sample(s) received by Laboratory Services on 12/6/13 : Report Date: Wednesday, January 29, 2014

WDNR Cert # 241329000 PSB Annex A 070 From: Laboratory Services Division

PSB Annex A231 Russ Rick To :

Total Mercury 18 ng/L E PA 245.7 MJL 46 12/13/13 Total Mercury Field Duplicate 18 ng/L E PA 245.7 MJL 51 12/13/13



### Sample Comments:
Associated Method Blank results: Blank1 0.72, Blank2 0.76 ng/L.



### If there are any questions concerning this report, please contact Kevin Howard at (414) 221-2833.

### Serial/Impact ID: Sample Collection Date: 12/10/13 Collection Time : 09:55 Sample Collector: ANDERSON 

### Sample Description: PPP P FGD WWTP Sample Pt. 102 

### Sample ID: AD77048

Parameter MDL Units Date Flag Method Analyst Result Analysis Analysis Result 

### The following are the analytical results for the sample(s) received by Laboratory Services on 12/12/13 : Report Date: Wednesday, January 29, 2014

WDNR Cert # 241329000 PSB Annex A 070 From: Laboratory Services Division

PSB Annex A231 Russ Rick To :

Total Mercury 18 ng/L E PA 245.7 MJL 58 12/13/13 Total Mercury Field Duplicate 18 ng/L E PA 245.7 MJL 79 12/13/13



### Sample Comments:
Associated Method Blank results: Blank1 0.72, Blank2 0.76 ng/L.



### If there are any questions concerning this report, please contact Kevin Howard at (414) 221-2833.

### Serial/Impact ID: Sample Collection Date: 12/ 11/13 Collection Time : 13:25 Sample Collector: ANDERSON 

### Sample Description: PPP P FGD WWTP Sample Pt. 102 

### Sample ID: AD77 112

Parameter MDL Units Date Flag Method Analyst Result Analysis Analysis Result 

### The following are the analytical results for the sample(s) received by Laboratory Services on 12/13/13 : Report Date: Wednesday, January 29, 2014

WDNR Cert # 241329000 PSB Annex A 070 From: Laboratory Services Division

PSB Annex A231 Russ Rick To :

Total Mercury 18 ng/L E PA 245.7 MJL 64 12/23/13 Total Mercury Field Duplicate 18 ng/L E PA 245.7 MJL 52 12/23/13



### Sample Comments:
Results for associated Hg Method Blanks: Blank1 <mdl, Blank2= 0.74 ng/L.



### If there are any questions concerning this report, please contact Kevin Howard at (414) 221-2833.

### Serial/Impact ID: Sample Collection Date: 12/17/13 Collection Time : 14:35 Sample Collector: ANDERSON 

### Sample Description: PPP P FGD WWTP Sample Pt. 102 

### Sample ID: AD77292

Parameter MDL Units Date Flag Method Analyst Result Analysis Analysis Result 

### The following are the analytical results for the sample(s) received by Laboratory Services on 12/19/13 : Report Date: Wednesday, January 29, 2014

WDNR Cert # 241329000 PSB Annex A 070 From: Laboratory Services Division

PSB Annex A231 Russ Rick To :

Total Mercury 18 ng/L E PA 245.7 MJL 37 12/23/13 Total Mercury Field Duplicate 18 ng/L E PA 245.7 MJL 46 12/23/13



### Sample Comments:
Results for associated Hg Method Blanks: Blank1 <mdl, Blank2= 0.74 ng/L.



### If there are any questions concerning this report, please contact Kevin Howard at (414) 221-2833.

### Serial/Impact ID: Sample Collection Date: 12/18/13 Collection Time : 13:05 Sample Collector: ANDERSON 

### Sample Description: PPP P FGD WWTP Sample Pt. 102 

### Sample ID: AD77293

Parameter MDL Units Date Flag Method Analyst Result Analysis Analysis Result 

### The following are the analytical results for the sample(s) received by Laboratory Services on 12/19/13 : Report Date: Wednesday, January 29, 2014

WDNR Cert # 241329000 PSB Annex A 070 From: Laboratory Services Division

PSB Annex A231 Russ Rick To :

Total Mercury 18 ng/L E PA 245.7 MJL 50 12/23/13 Total Mercury Field Duplicate 18 ng/L E PA 245.7 MJL 47 12/23/13



### Sample Comments:
Results for associated Hg Method Blanks: Blank1 <mdl, Blank2= 0.74 ng/L.



### If there are any questions concerning this report, please contact Kevin Howard at (414) 221-2833.

## Enclosure II – Typical Coal Quality Inform ation for Mines Supplying Coal to Pleasant Prairie Power Plant in 2012 and 2013

## QUALITY PARAMETER TYPICAL STANDARD TYPICAL TYPICAL (MEAN VALUE) DEVIATION -2 STD DEV +2 STD DEV DRY VALUE M OISTURE-ASH FREE VALUE

PROXIMATE % Moisture 29.59 0.70 28.19 30.99 % Ash 5.43 0.59 4.24 6.62 7.71 % Volatile 30.91 1.06 28.79 33.03 43.90 47.57 % Fixed Carbon 33.85 1.45 30.95 36.75 48.08 52.10 BTU/lb 8450 97.67 8255 8645 12015 13020 MAFBTU 13020 13020 13020 Dry BTU 12015 93.67 11828 12203 % Sulfur 0.34 0.04 0.24 0.39 0.45 0.48

ULTIMATE % Moisture 29.59 0.70 28.19 30.99 % Carbon 49.22 1.30 46.62 51.82 69.91 75.75 % Hydrogen 3.41 0.21 2.99 3.83 4.84 5.25 % Nitrogen 0.77 0.17 0.43 1.11 1.09 1.19 % Chlorine 0.01 0.01 0.00 0.03 0.01 0.02 % Sulfur 0.31 0.04 0.24 0.39 0.45 0.48 % Ash 5.43 0.59 4.24 6.62 % Oxygen 11.02 1.01 9.00 13.04 15.65 16.96

SULFUR FORMS Pyritic Sulfur (%) 0.03 0.02 0.00 0.07 0.04 0.05 Sulfate Sulfur (%) 0.002 0.006 0.000 0.014 0.003 0.003 Organic Sulfur (%) 0.28 0.02 0.25 0.31 0.40 0.43 Total Sulfur (%) 0.31 0.04 0.24 0.39 0.45 0.48

MINERAL ANALYSIS OF ASH % Silicon Dioxide (Silica, SiO2) 33.95 4.24 25.47 42.43 % Aluminum Oxide (Alumina, Al2O3) 17.91 1.78 14.35 21.47 % Titanium Dioxide (Titania, TiO2) 1.48 0.17 1.14 1.82 % Iron Oxide (Ferric Oxide, Fe2O3) 5.07 0.71 3.65 6.49 % Calcium Oxide (Lime, CaO) 22.42 3.29 15.84 29.00 % Magnesium Oxide (Magnesia, MgO) 3.99 0.67 2.65 5.33 % Potassium Oxide (K2O) 0.37 0.16 0.05 0.69 % Sodium Oxide (Na2O3) 1.39 0.23 0.93 1.85 % Sulfur Trioxide (SO3) 9.99 2.50 4.99 14.99 % Phosphorous Pentoxide (P2O5) 0.94 0.28 0.38 1.50 % Strontium Oxide (SrO) 0.41 0.09 0.23 0.59 % Barium Oxide (BaO) 0.63 0.13 0.37 0.89 % Undetermined 1.20 1.81 0.00 4.82 Base/Acid Ratio 0.64 0.13 0.38 0.90 Base Value 33.23 4.14 24.95 41.51 Acid Value 53.33 5.30 42.73 63.93

ASH FUSION TEMPERATURES Reducing ( O F) Initial 2145 60 2025 2265 Softening (H=W) 2165 60 2045 2285 Hemispherical (H=1/2W) 2175 65 2045 2305 Fluid 2205 85 2035 2375 Fluid-Initial Temp. Difference 60 30 0 120
Oxidizing ( O F) Initial 2205 55 2095 2315 Softening (H=W) 2220 60 2100 2340 Hemispherical (H=1/2W) 2230 65 2100 2360 Fluid 2260 85 2090 2430 Fluid-Initial Temp. Difference 55 30 0 115



# CORDERO ROJO MINE TYPICAL QUALITY SPECIFICATIONS

TYPICAL 95% RANGE

## QUALITY PARAMETER TYPICAL STANDARD (MEAN VALUE) DEVIATION -2 STD DEV +2 STD DEV

ADDITIONAL ANALYSES AND CALCULATED VALUES T250 Temperature ( O F) 2190 110 1970 2410 HGI (at as-received moisture) 74 10 54 94 HGI % Moisture 26.11 4.60 17 35 Critical Viscosity Temperature ( O F) NA Critical Viscosity (Poises) NA % Equilibrium Moisture 28.24 1.29 25.66 30.82 Specific Gravity 1.26 0.02 1.22 1.30 %Alkalies NA2O Dry (Total Alkali Content on Coal) 0.122 0.018 0.086 0.158 %Water Soluble Alk - Na2O 0.053 0.010 0.033 0.073 %Water Soluble Alk - K2O 0.003 0.002 0.000 0.007 %Na2O - Dry Coal NA %Na2O As-received Coal NA Silica Value (Silica Ratio) 51.88 6.12 Slag Factor 0.29 0.06 0.17 0.41 Slag factor per Fusion Temperature 2162 59 2044 2280 Dolomite Ratio 79.28 2.47 74.34 84.22 Ash Precipitation Index 24.32 3.04 18.24 30.40 Silica to Alumina Ratio 1.90 0.21 1.48 2.32 Calcium to Silica Ratio 0.68 0.16 0.36 1.00 Iron to Calcium Ratio 0.23 0.04 0.16 0.30 Fouling Factor (Fouling Index) NA SO2/MMBTU 0.80 0.09 0.57 0.91 lbs S/MMBTU 0.37 0.04 0.28 0.46 lbs Sodium/MMBTU 0.089 0.03 0.04 0.14 lbs Ash/MMBTU 6.42 0.75 4.91 7.93

TYPICAL COAL SIZE 3 inch Cumulative Wt. Percent

Size Fraction Wt. Percent Wt. Percent Passing Top +3" RD. 1% 1% 100% 3" RD. x 2" RD. 10% 11% 99% 2" RD. x 1" RD. 20% 31% 89% 1" RD. x 1/2" RD. 21% 52% 69% 1/2" RD. x 4 M 20% 72% 48% 4 M x 60 M 20% 92% 28% 60 M x 0 8% 100% 8% 100%

TRACE ELEMENT SUMMARY Parts Per Million TYPICAL STANDARD Whole Coal, Dry Basis (MEAN VALUE) DEVIATION -2 STD DEV +2 STD DEV
ANTIMONY (Sb) 0.83 0.31 0.21 1.45 ARSENIC (As) 1.17 0.32 0.53 1.81 BARIUM (Ba) 304.65 137.49 29.67 579.63 BERYLLIUM (Be) 0.26 0.08 0.10 0.42 BORON (B) 30.80 4.32 22.16 39.44 BROMINE (Br) 14.92 6.56 1.80 28.04 CADMIUM (Cd) 0.18 0.04 0.10 0.26 CHLORINE (Cl) 11.36 7.15 0.00 25.66 CHROMIUM (Cr) 6.23 2.06 2.11 10.35 COBALT (Co) 2.74 2.05 0.00 6.84 COPPER (Cu) 10.96 4.29 2.38 19.54 FLUORINE (F) 48.08 16.08 15.92 80.24 LITHIUM (Li) 4.47 1.90 0.67 8.27 MANGANESE Mn) 18.04 13.70 0.00 45.44 MERCURY (Hg) 0.073 0.028 0.017 0.129 MOLYBDNEUM (Mo) 2.50 1.02 0.46 4.54 NICKEL (Ni) 4.50 1.45 1.60 7.40 LEAD (Pb) 4.01 1.25 1.51 6.51 SELENUIM (Se) 0.98 0.14 0.70 1.26 SILVER (Ag) 0.18 0.04 0.10 0.26 STRONTIUM (Sr) 316.75 247.14 0.00 811.03 THALLIUM (Tl) 0.82 0.46 0.00 1.74 THORIUM (Th) 2.05 0.50 1.05 3.05 TIN (Sn) 1.20 0.40 0.40 2.00 URANIUM (U) 0.57 0.48 0.00 1.53 VANADIUM (V) 16.42 12.32 0.00 41.06 ZIRCONIUM (Zr) 7.45 9.29 0.00 26.03 ZINC (Zn) 7.04 2.68 1.68 12.40 * All negative numbers were converted to 0.00 TYPICAL 95% RANGE 

### CORDERO ROJO COAL MINE QUALITY SPECIFICATIONS (Continued)

TYPICAL 95% RANGE

# ROCHELLE / NORTH ANTELOPE * 2011 through 2015 * TYPICAL ANALYSI S
Raw Basis Report Data 3/31/11 Seam Wyodak-Anderso n State of Wyoming

Proximate Analysi s As Received Dr y A sh Fusion Moisture 27.3 Reducing Atmosphere Ash 4.6 6.2 Initial Deformation (I.D.) 2135 Volatile Matte r 31.6 43.5 Softening (H=W) 2145 Fixed Carbon 36.5 50.3 Hemispherical (H=1/2W) 2155 BTU 8800 12104 Fluid 2185 Sulfur 0.21 0.29 Oxidizing Atmosphere MAFBTU 12904 Initial Deformation (I.D.) 2195 Lb. SO2/MMBTU 0.48 Softening (H=W) 2200 Lb. S/MMBTU 0.24 Hemispherical (H=1/2W) 2210 Fluid 2235 Ultimate Analysi s Carbon 69.9 Mineral Analysis Of Ash (Ignited Basis ) Hydrogen 4.8 Silica (SiO2) 32.6 Nitrogen 0.9 Alumina (Al2O3) 16.5 Chlorine <0.01 Titania (TiO2) 1.3 Sulfur 0.29 Ash 6.2 Ferric Oxide (Fe2O3) 5.6 Oxygen 17.91 Lime (CaO) 24.0 Magnesia (MgO) 5.5 Sulfur Forms Potassium Oxide (K2O) 0.4 Pyritic 0.02 Sodium Oxide (Na2O) 1.8 Sulfate <0.01 Organic 0.27 Phosphorous Pentoxide (P2O5 ) 1.2 Sulfur Trioxide (SO3) 10.1 Water Soluble Alkalie s Strontium Oxide (SrO) 0.3 Sodium Oxide 0.077 Barium Oxide (BaO) 0.7 Potassium Oxide 0.004 Manganese Dioxide (MnO2 ) <0.1
Equilibrium Moisture 26.2 A lkalies As Na2 O 0.13
Free Swelling Inde x 0.0 Base/Acid Rati o 0.74
Hardgrove Grindability Inde x 65 Silica Value 48.2 @ 25.5% Moisture Slag Viscosity @ T250 2170 Mercury Hg ppm 0.06 (Dry Whole Coal Basis) Lb. Ash/MMBTU 5.1
lbs.Hg / trillion Btu's 4.96 Lb. Na2O/MMBTU 0.09

All analyses are subject to revision due to additional coring, conditions specified in the coal supply agreement, actual operating conditions at time of mining, type of preparation at time of mining, or federal and state regulations. Analysis intended for informational purposes only.

Source Proximate analysis based on mine model by K. Lohkamp & F. Visger.

Of Approximate blend 9% Middle, 33% South, 35% North and 23% East Information

Prepared by W.B. Emke