Sue Wallace 

Tara Thomas 

Miami Fort Generating Station 

11021 Brower Road 

North Bend, OH 45052 

Re: Miami Fort NPDES Permit OH0009873- Revision of laboratory Results for Outfall 608 

Sue&Tara: 

For the permit effective July 1, 2009, analysis of Internal Monitoring Station 608 has been performed 

since July 2009. During August and September of 2009, a study was completed to approximate the 

effect of the FGD matrix on analytical results. The matrix has high concentrations of total dissolved 

solids, sulfates and chlorides. Dilutions of the sample at preparation and before instrumental analysis 

aid in achieving acceptable quality control and analytical results. Method 200.8 (ICP-MS) is more 

sensitive and therefore allows for greater dilutions at the instrument whHe maintaining a lower reporting 

limit Ohio EPA allowed for the use of this method on some of the metals after reviewing a summary of 

the study. This was approved in September 2009. 

Implementation of these dilutions on the samples took place beginning in September 2009. During a 

recent review of data and calculations, an error was detected by the laboratory. For this sample site 

the dHution factor was not applied to the final analytical result. The process of dDuting a sample before 

preparation is not what is normally done for metals digestions. Cala.dations for these dilutions were not 

included at instrumental analysis or during final reporting of the data via the laboratory's information 

management system (LIMS). As a result, the reported values for many of the metals were 1/201h of the 

actual concentration: due to not applying the 20X dDution factor from the sample preparation. 

Following our quality assurance program, a corrective action has been initiated to resolve the issue. 

The foiiOINing items YJere identified to correct the pr~em 1. Analytical results were recalculated using all dUution factors. (Corrected concentrations for the 

effected samples are attached to this letter). 

2. For samples beginning in September 2010 going forward, dilution factors at sample 

preparation will be reflected in the LIMS system and \WI be included in the final calculation of 

analytical results to be reported. 

3. Program managers will review the calculations each month to ensure accuracy before reports 

are released by the laboratory. 

4. Hard copies of the revised reports will be issued to Miami Fort 

Please do not hesitate to contact me with questions or concerns. 

www duke·energy.com 
David R. Greene 

Laboratory Manager- Duke Energy Analytical Laboratory 

(Office) 980.875.4438 

(Pager) 704.838.6575 (Cell) 704.838.6575 

E-maD: droreene@duke-enerav.com 

Attachments: Corrected Analytical Results for Outfall 608 - Miami Fort Station 

.cc Pat Coyle, Rodney Wike, Marge Galvin-Karr, Troy Whisenant, Penny Franklin 

www.duke-energy com 
g

Sample Description: Miami Fort - Outfall 608 Arsenic EPA 200.8 <1.0 <20 ug/L 

Barium EPA 200.8 8.4 168 ug/L 

cadmium EPA 200.8 <1.0 <20 ug/L 

Laboratory Job #: 09-SEP-0027 Chromium EPA 200.8 <1.0 <20 ug/L 

Copper EPA 200.8 <1.0 <20 ug/L 

Iron EPA 200.8 4.5 90 ug/L 

Laboratory Sample #: 29021644 Lead EPA 200.8 < 1.00 <20 ug/L 

Zinc EPA 200.8 < 1.00 <20 ug/L 

Oct-09 ADihWI Hmbgd Bi!Rill:bd ~rrect:ml UDIIIi 

Sample Desaiptlon: Miami Fort - Outfall 608 Arsenic EPA 200.8 <1.0 <20 ug/L 

Barium EPA 200.8 7.7 154 ug/L 

Cadmium EPA 200.8 <1.0 <20 ug/L 

Laboratory Job #: 09-0CT-0029 Chromium EPA 200.8 <1.0 <20 ug/L 

Copper EPA 200.8 <1.0 <20 ug/L 

Iron EPA 200.8 15.1 302 ug/L 

Laboratory Sample #: 29023538 Lead EPA 200.8 < 1.0 <20 ug/L 

Zinc EPA 200.8 < 2.00 <40 ug/L 

Nov-09 ADi!!llWI Hmtu:~d ~IUU:tad ~rrect:ed 11!!1§ 

Sample Description: Miami Fort - Outfall 608 Arsenic EPA 200.8 <1.0 <20 ug/L 

Barium EPA 200.8 5.9 118 ug/L 

cadmium EPA 200.8 < 1.0 <20 ug/L 

Laboratory Job #: 09-NOV-0031 Chromium EPA 200.8 <1.0 <20 ug/L 

Copper EPA 200.8 <1.0 <20 ug/L 

Iron EPA 200.8 7.4 148 ug/L 

Laboratory Sample #: 29025225 Lead EPA 200.8 <1.0 <20 ug/L 

Zinc EPA 200.8 1.1 22 ug/L 

Dec-09 a .. ,. ...... Hat~Jgd bartect ~~~IDcted Un.ID 

Sample Description: Miami Fort - Outfall 608 Arsenic EPA 200.8 <1.0 <20 ug/L 

Barium EPA 200.8 5.5 110 ug/L 

cadmium EPA 200.8 <1.0 <20 ug/L 

Laboratory Job #: 09-DEC-0031 Chromium EPA 200.8 <1.0 <20 UQ/l 

Copper EPA 200.8 <1.0 <20 ug/L 

Iron EPA 200.8 21.9 438 ug/L 

Laboratory Sample #: 29026933 Lead EPA 200.8 <1.0 <20 ug/L 

Zinc EPA 200.8 < 2.00 <40 ug/L 

Page 1 of 3 
g

cadmium EPA 200.8 1.00 <20 ug/L 

Laboratory Job #: 10-JAN-0042 Chromium EPA 200.8 7.4 <20 ug/L 

Copper EPA 200.8 1.3 <20 ug/L 

Laboratory Sample #: 30000111 Lead EPA 200.8 <2.0 <40 ug/L 

Zinc EPA 200.8 5.3 <20 ug/L 

Feb-10 ADilbru2 Halb2d biHUDd ~grrected Jlnlb 

Sample Desaiption: Miami Fort - Outfall 608 Arsenic EPA 200.8 <1.0 <20 ug/L 

Barium EPA 200.8 9 180 ug/ L 

cadmium EPA 200.8 <1.0 <20 ug/L 

Laboratory Job #: 10-FEB-0027 Chromium EPA 200.8 <1.0 <20 ug/L 

Copper EPA 200.8 <1.0 <20 ug/L 

Laboratory Sample #: 30001626 Lead EPA 200.8 <2.0 <40 ug/ L 

Zinc EPA 200.8 <2.0 <40 ug/L 

Mar-10 AmlhWI Hmbgd bRSIIDd ~ID5Dd J.lnR:i 

Sample Desaiption: Miami Fort - Outfall 608 Arsenic EPA 200.8 <2.0 <40 ug/ L 

Barium EPA 200.8 6 120 ug/ L 

cadmium EPA 200.8 <2.0 <40 ug/ L 

Laboratory Job #: 10-MAR-0026 Chromium EPA 200.8 <2.0 <40 ug/ L 

Copper EPA 200.8 <2.0 <40 ug/ L 

Laboratory Sample #: 30003367 Lead EPA 200.8 <2.0 <40 ug/L 

Zinc EPA 200.8 <4.0 <80 ug/L 

Apr-10 ADi11¥1t1 Hmbgd Reao~d Corn!cted Unlla 

Sample Description: Miami Fort - Outfall 608 Arsenic EPA 200.8 <1.0 <20 ug/ L 

Barium EPA 200.8 5.5 110 ug/ L 

cadmium EPA 200.8 <1.0 <20 ug/L 

Laboratory Job #: 10-APR-0028 Chromium EPA 200.8 <1.0 <20 ug/ L 

Copper EPA 200.8 <1.0 <20 ug/ L 

Laboratory Sample #: 30005479 Lead EPA 200.8 <1.0 <20 ug/L 

Zinc EPA 200.8 < 2.00 <40 ug/ L 

Page 2 of 3 
p

p

g

Barium EPA 200.8 6.6 132 ug/L 

Cadmium EPA 200.8 <1.0 <20 ug/L 

Laboratory Job #: 1Q-MAY-0027 Chromium EPA 200.8 1.1 22 ug/L 

Copper EPA 200.8 <1.0 <20 ug/L 

Laboratory Sample #: 30007150 Lead EPA 200.8 <1.0 <20 ug/L 

Zinc EPA 200.8 < 2.00 <40 ug/L 

Jun-10 An1tua MgtiJgd Bgasu:md ~rrectgd UD.I§ 

Sample Description: Miami Fort - Outfall 608 Arsenic EPA 200.8 <1.0 <20 UQ/l 

Barium EPA 200.8 6.2 124 ug/L 

Cadmium EPA 200.8 <1.0 <20 ug/L 

Laboratory Job #: 10-JUN-0022 Chromium EPA 200.8 <1.0 <20 ug/L 

Copper EPA 200.8 <1.0 <20 ug/L 

Laboratory Sample #: 30008963 Lead EPA 200.8 <1.0 <20 ug/L 

Zinc EPA 200.8 < 2.00 <40 ug/L 

Jul-10 Ao11m Mm~Jgd B,ggg£tgd ~gl]]lcted .l.lnib. 

Sample Description: Miami Fort - Outfall 608 Arsenic EPA 200.8 <1.0 <20 ug/L 

Barium EPA 200.8 8.9 178 ug/L 

Cadmium EPA 200.8 <1.0 <20 ug/L 

Laboratory Job #: 10-JUL-0026 Chromium EPA 200.8 <1.0 <20 ug/L 

Copper EPA 200.8 1.4 28 ug/L 

Laboratory Sample #: 30010774 Lead EPA 200.8 <1.0 <20 ug/L 

Zinc EPA 200.8 <2.0 <40 ug/L 

Aug-10 A ... t:Jmbgd Bggg[ted ~m:cted u.nJb 

Sample Description: Miami Fort - Outfall 608 Arsenic EPA 200.8 <1.0 <20 ug/L 

Barium EPA 200.8 7.2 144 ug/L 

Cadmium EPA 200.8 <1.0 <20 ug/L 

Laboratory Job #: 10-AUG-0026 Chromium EPA 200.8 1 20 ug/L 

Copper EPA 200.8 <1.0 <20 ug/L 

Laboratory Sample#: 30012454 Lead EPA 200.8 <1.0 <20 ug/L 

Zinc EPA 200.8 < 2.00 <40 ug/L 

Page 3of 3