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

REVISED REPORT: Due to a calculation error, the trivalent chromium value changed. Note: This is a reissue of a previously generated report. Information herein supersedes that of previously issued report(s). 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 M(b)
Lab Order: G1403388

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 3Physical Tests SM 2540D Analyst: KLS

Total suspended solids 6 1 mg/L 1 03/11/2014 12:45

Inorganic Non-Metals SM 2540 C Analyst: KLS
Total dissolved solids 27700 20 mg/L 1 03/11/2014 12:46

Indicator Organic Parameters SM 5210 B Analyst: MMR BOD 5-day < 2 2 mg/L 1.5 03/12/2014 06:26

Inorganic Non-Metals USGS I-1187-85 Analyst: CLS
Chloride 17700 1000 mg/L 200 03/17/2014 12:23

Inorganic Metals EPA 200.8 Analyst: RXS Selenium, dissolved 0.020 0.001 mg/L 1 03/24/2014 16:04

Inorganic Metals EPA 200.8 Analyst: RXS
Arsenic 0.002 0.001 mg/L 1 03/19/2014 19:01
Chromium < 0.005 0.005 mg/L 1 03/19/2014 19:01
Nickel 0.0051 0.0005 mg/L 1 03/19/2014 19:01
Selenium 0.021 0.001 mg/L 1 03/14/2014 20:27

Inorganic Metals EPA 200.7 Analyst: GMG Iron, dissolved < 0.05 0.05 mg/L 1 03/13/2014 19:42

Inorganic Metals SM 3112B Analyst: RXS Mercury < 0.0002 0.0002 mg/L 1 03/17/2014 12:57

Inorganic Metals EPA 200.7 Analyst: GMG
Aluminum < 0.1 0.1 mg/L 1 03/13/2014 19:39 Beryllium < 0.001 0.001 mg/L 1 03/14/2014 15:32
Boron 279 2.50 mg/L 50 03/14/2014 14:40
Cadmium 0.003 0.002 mg/L 1 03/13/2014 19:39 Copper < 0.01 0.01 mg/L 1 03/13/2014 19:39



# 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: G1403388 Project: Keystone 611 M(b) Sampled By: NRG
Lab ID: G1403388-001 Collection Date: 03/10/2014 09:15
Matrix: Aqueous Received Date: 03/10/2014 17:23
Analyses Result QL Q Units DF Date Analyzed



### Page 2 of 3Iron 0.07 0.05 mg/L 1 03/13/2014 19:39

Lead < 0.02 0.02 mg/L 1 03/13/2014 19:39 Manganese 21.7 0.01 mg/L 1 03/13/2014 19:39
Silver < 0.005 0.005 mg/L 1 03/13/2014 19:39
Zinc < 0.01 0.01 mg/L 1 03/13/2014 19:39

Trivalent Chromium EPA 200.7/I-1230-85 Analyst: LAN
Trivalent Chromium < 0.02 0.02 mg/L 1 03/21/2014 00:00

Indicator Organic Parameters EPA 1664 Analyst: MTM
Oil & Grease < 5 5 mg/L 1.03 03/17/2014 17:22
NOTES: S - Spike recovery indicates a possible matrix effect. The method is in control as indicated by the LCS. 

# 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: G1403388 Project: Keystone 611 M(b) Sampled By: NRG
Lab ID: G1403388-001 Collection Date: 03/10/2014 09:15
Matrix: Aqueous Received Date: 03/10/2014 17:23
Analyses Result QL Q Units DF Date Analyzed



### Page 3 of 3