## No problems were encountered during analysis of this workorder, except if noted in this report.

REVISED REPORT: Mercury value changd for G1204416-002, incorrect prep factor entered originally. 2005 N. Center Ave. Somerset PA 15501

814-443-1671 814-445-6666 FAX:814-445-6729
Client: GenOn ENERGY INC. - KEYSTONE STATION 

## CASE NARRATIVE Project: Keystone 611 Q(b) Lab Order: G1204416

Legend: ND - Not Detected at the Quantitation Limit S - Spike Recovery outside accepted recovery limits
J - Indicates an estimated value R - RPD outside accepted recovery limits U - The analyte was not detected at or above the listed E - Value above quantitation range concentration, which is below the laboratory quantitation limit ** - Value exceeds Action Limit B - Analyte detected in the associated Method Blank H - Method Hold Time Exceeded Q - Qualifier QL - Quantitation Limit DF - Dilution Factor MCL - Contaminant Limit



### Page 1 of 5Physical Tests SM 2540 D Analyst: KLS

Total suspended solids < 5 5 mg/L 1 04/11/2012 09:50

Inorganic Non-Metals SM 2540 C Analyst: KLS
Total dissolved solids 30500 100 mg/L 5 04/11/2012 09:50

Indicator Organic Parameters SM 5210 B Analyst: MMR BOD 5-day < 2 2 mg/L 1.5 04/11/2012 11:35

Finish Date/Time 4/16/2012 11:10 0 mg/L 1.5 04/11/2012 11:35

Inorganic Non-Metals SM 4500-CL E Analyst: MLS
Chloride 14600 1000 mg/L 200 04/11/2012 16:36

Inorganic Metals EPA 200.7 Analyst: MBG Iron, dissolved < 0.05 0.05 mg/L 1 04/14/2012 10:22 Selenium, dissolved 0.39 0.02 mg/L 1 04/14/2012 10:22

Inorganic Metals SM 3112 B Analyst: JEK Mercury < 0.0002 0.0002 mg/L 1 04/12/2012 11:20

Inorganic Metals EPA 200.7 Analyst: MBG
Aluminum < 0.1 0.1 mg/L 1 04/12/2012 23:36
Arsenic < 0.02 0.02 mg/L 1 04/12/2012 23:36 Beryllium < 0.001 0.001 mg/L 1 04/12/2012 23:36
Boron 235 2.50 mg/L 50 04/13/2012 17:13
Cadmium 0.003 0.002 mg/L 1 04/12/2012 23:36
Chromium < 0.01 0.01 mg/L 1 04/12/2012 23:36 Copper < 0.01 0.01 mg/L 1 04/12/2012 23:36
Iron < 0.05 0.05 mg/L 1 04/12/2012 23:36
Lead < 0.02 0.02 mg/L 1 04/12/2012 23:36 Manganese 20.5 0.10 mg/L 10 04/13/2012 18:21
Nickel 0.01 0.01 mg/L 1 04/12/2012 23:36



# Laboratory Results

2005 N. Center Ave. Somerset PA 15501

814-443-1671 814-445-6666 FAX:814-445-6729
Client: GenOn ENERGY INC. - KEYSTONE STATION Client Sample ID: Outfall 101 Lab Order: G1204416 Project: Keystone 611 Q(b) Sampled By: Client
Lab ID: G1204416-001 Collection Date: 04/10/2012 10:20 Matrix: Aqueous Received Date: 04/10/2012 20:17 Analyses Result QL Q Units DF Date Analyzed



### Page 2 of 5Selenium 0.12 0.02 mg/L 1 04/12/2012 23:36

Silver < 0.005 0.005 mg/L 1 04/14/2012 03:17
Zinc < 0.01 0.01 mg/L 1 04/12/2012 23:36

Trivalent Chromium Calculated Analyst: LAN
Trivalent Chromium < 0.02 0.02 mg/L 1 04/17/2012 00:00

Indicator Organic Parameters EPA 1664 Analyst: AMS
Oil & Grease < 5 5 mg/L 0.99 04/16/2012 08:42



# Laboratory Results

2005 N. Center Ave. Somerset PA 15501

814-443-1671 814-445-6666 FAX:814-445-6729
Client: GenOn ENERGY INC. - KEYSTONE STATION Client Sample ID: Outfall 101 Lab Order: G1204416 Project: Keystone 611 Q(b) Sampled By: Client
Lab ID: G1204416-001 Collection Date: 04/10/2012 10:20 Matrix: Aqueous Received Date: 04/10/2012 20:17 Analyses Result QL Q Units DF Date Analyzed



### Page 3 of 5Inorganic Non-Metals SM 2540 C Analyst: KLS

Total dissolved solids 39900 200 mg/L 10 04/11/2012 09:50

Physical Tests SM 2540 B Analyst: KLS Total suspended solids 15200 100 mg/L 20 04/11/2012 09:49

Indicator Organic Parameters SM 5210 B Analyst: MMR BOD 5-day 15 3 mg/L 3 04/11/2012 11:35

Finish Date/Time 4/16/2012 11:10 0 mg/L 3 04/11/2012 11:35

Inorganic Non-Metals SM 4500-CL E Analyst: MLS
Chloride 13400 1000 mg/L 200 04/11/2012 16:36

Inorganic Metals EPA 200.7 Analyst: MBG Iron, dissolved < 0.05 0.05 mg/L 1 04/14/2012 10:38 Selenium, dissolved 0.10 0.02 mg/L 1 04/14/2012 10:38

Inorganic Metals SM 3112 B Analyst: JEK Mercury 0.66 0.10 mg/L 500 04/12/2012 12:42

Inorganic Metals EPA 200.7 Analyst: MBG
Aluminum 277 1.0 mg/L 1 04/14/2012 19:52
Arsenic 1.56 0.20 mg/L 1 04/14/2012 19:52 Beryllium 0.044 0.010 mg/L 1 04/14/2012 19:52
Boron 323 5.00 mg/L 10 04/16/2012 15:46
Cadmium < 0.020 0.020 mg/L 1 04/14/2012 19:52
Chromium 1.90 0.10 mg/L 1 04/14/2012 19:52 Copper 1.62 0.10 mg/L 1 04/14/2012 19:52
Iron 1730 0.50 mg/L 1 04/14/2012 19:52
Lead 0.61 0.20 mg/L 1 04/14/2012 19:52 Manganese 297 0.10 mg/L 1 04/14/2012 19:52
Nickel 4.65 0.10 mg/L 1 04/14/2012 19:52



# Laboratory Results

2005 N. Center Ave. Somerset PA 15501

814-443-1671 814-445-6666 FAX:814-445-6729
Client: GenOn ENERGY INC. - KEYSTONE STATION Client Sample ID: FGD Influent Lab Order: G1204416 IWT Influent Special Project: Keystone 611 Q(b) Sampled By: Client
Lab ID: G1204416-002 Collection Date: 04/10/2012 10:10 Matrix: Aqueous Received Date: 04/10/2012 20:17 Analyses Result QL Q Units DF Date Analyzed



### Page 4 of 5Selenium 3.52 0.20 mg/L 1 04/14/2012 19:52

Silver < 0.050 0.050 mg/L 1 04/14/2012 19:52
Zinc 3.98 0.10 mg/L 1 04/14/2012 19:52

Trivalent Chromium Calculated Analyst: LAN
Trivalent Chromium 1.90 0.02 mg/L 1 04/17/2012 00:00

Indicator Organic Parameters EPA 1664 Analyst: AMS
Oil & Grease < 19 19 mg/L 3.7 04/16/2012 08:59



# Laboratory Results

2005 N. Center Ave. Somerset PA 15501

814-443-1671 814-445-6666 FAX:814-445-6729
Client: GenOn ENERGY INC. - KEYSTONE STATION Client Sample ID: FGD Influent Lab Order: G1204416 IWT Influent Special Project: Keystone 611 Q(b) Sampled By: Client
Lab ID: G1204416-002 Collection Date: 04/10/2012 10:10 Matrix: Aqueous Received Date: 04/10/2012 20:17 Analyses Result QL Q Units DF Date Analyzed



### Page 5 of 5