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

Samples were not filtered in the field for dissolved metals; samples were lab filtered. 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: Permit Renewal
Lab Order: G1204400

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 7Inorganic Non-Metals SM 2540 C Analyst: KLS

Total dissolved solids 34400 200 mg/L 10 04/11/2012 09:50

Physical Tests SM 2540D Analyst: KLS Total suspended solids 16000 100 mg/L 20 04/11/2012 09:49

Indicator Organic Parameters SM 5210 B Analyst: MMR BOD 5-day 17 3 mg/L 3 04/11/2012 10:45

Finish Date/Time 4/16/2012 10:10 0 mg/L 3 04/11/2012 10:45

Inorganic Non Metals SM 4500-CNI Analyst: MLR Cyanide, free 79 10 μg/L 1 04/12/2012 13:41

Inorganic Non Metals SM 4500-CN-C&E Analyst: MLR Cyanide, total 98 10 μg/L 1 04/11/2012 13:47

Indicator Organic Parameters HACH 8000 Analyst: SEM Chemical Oxygen Demand 1100 100 mg/L 10 04/12/2012 15:45

Physical Tests SM 2120C Analyst: MLS
Color 22 10 Color Units 1 04/10/2012 19:35

Inorganic Non Metals USGS I-1230-85 Analyst: SAG
Hexavalent Chromium 37 20 μg/L 1 04/10/2012 19:45

Inorganic Non-Metals EPA 300.0 Analyst: CAS
Bromide 202 5.0 mg/L 25 04/16/2012 19:05
Fluoride 4.5 1.0 mg/L 10 04/12/2012 22:20
Sulfate 1230 20 mg/L 10 04/12/2012 22:20

Inorganic Non-Metals SM 5540C Analyst: SEM

MBAS 0.5 0.50 mg/L as 10 04/11/2012 10:40



# 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: 101 Inf
Lab Order: G1204400 Project: Permit Renewal Sampled By: Client
Lab ID: G1204400-001 Collection Date: 04/10/2012 10:00
Matrix: Aqueous Received Date: 04/10/2012 18:07
Analyses Result QL Q Units DF Date Analyzed



### Page 2 of 7LAS

Inorganic Non-Metals EPA 350.1 Analyst: SLY Ammonia Nitrogen - Distilled 7.48 0.50 mg/L as N 5 04/12/2012 14:21

Inorganic Non-Metals EPA 353.2 Analyst: SLY
Nitrate - Nitrite 30.5 0.50 mg/L as N 10 04/16/2012 11:34

Inorganic Non-Metals SM 4500-P B.5 E Analyst: SEM Phosphorus, total 15 10 mg/L as P 100 04/12/2012 14:49

Indicator Organic Parameters EPA 420.1 Analyst: MLR
Phenolics 10.0 20.0 μg/L 1 04/12/2012 11:25

Inorganic Non Metals SM 4500 S D Analyst: KMW
Sulfide 0.050 0.1 mg/L 1 04/12/2012 15:30

Inorganic Non Metals SM 4500-SO3 B Analyst: MLS
Lab Sulfite 90 20 mg/L 10 04/10/2012 19:22

Inorganic Non-Metals EPA 351.2 Analyst: SLY Total Kjeldahl Nitrogen 54.6 5.0 mg/L as N 5 04/17/2012 09:07

Inorganic Metals SM 3112B Analyst: JEK Mercury 650 100 μg/L 500 04/12/2012 11:04

Inorganic Metals EPA 200.7 Analyst: MBG
Aluminum 252000 1000 μg/L 1 04/14/2012 19:58 Antimony 100 200 μg/L 1 04/14/2012 19:58
Arsenic 1390 200 μg/L 1 04/14/2012 19:58
Barium 22000 100 μg/L 1 04/14/2012 19:58 Beryllium 41.0 10.0 μg/L 1 04/14/2012 19:58
Boron 304000 5000 μg/L 10 04/16/2012 15:50
Cadmium 11 20.0 μg/L 1 04/14/2012 19:58
Calcium 6750000 10000 μg/L 10 04/16/2012 15:50



# 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: 101 Inf
Lab Order: G1204400 Project: Permit Renewal Sampled By: Client
Lab ID: G1204400-001 Collection Date: 04/10/2012 10:00
Matrix: Aqueous Received Date: 04/10/2012 18:07
Analyses Result QL Q Units DF Date Analyzed



### Page 3 of 7Chromium 1740 100 μg/L 1 04/14/2012 19:58

Cobalt 541 50.0 μg/L 1 04/14/2012 19:58 Copper 1490 100 μg/L 1 04/14/2012 19:58
Iron 1590000 500 μg/L 1 04/14/2012 19:58
Lead 578 200 μg/L 1 04/14/2012 19:58 Magnesium 2450000 10000 μg/L 10 04/16/2012 15:50 Manganese 281000 100 μg/L 1 04/14/2012 19:58 Molybdenum 428 200 μg/L 1 04/14/2012 19:58
Nickel 4350 100 μg/L 1 04/14/2012 19:58
Selenium 3220 200 μg/L 1 04/14/2012 19:58
Silver 20.0 50.0 μg/L 1 04/14/2012 19:58
Thallium 200 200 μg/L 1 04/14/2012 19:58
Tin 500 1000 μg/L 1 04/14/2012 19:58
Titanium 3820 50.0 μg/L 1 04/14/2012 19:58
Zinc 3700 100 μg/L 1 04/14/2012 19:58 Hardness (SM 2340B) 27000000 100000 μg/L 10 04/16/2012 15:50

Trivalent Chromium ug/L EPA 200.7/I-1230-85 Analyst: LAN
Trivalent Chromium 1700000 20.0 μg/L 1 04/27/2012 00:00

Inorganic Metals EPA 200.7 Analyst: GMG Iron, dissolved 50.0 250 μg/L 5 04/16/2012 15:48

Semi-Volatile Compounds EPA 625 Analyst: NPT 1,2,4-Trichlorobenzene 20 40 μg/L 4 04/19/2012 01:48 1,2-Dichlorobenzene 20 40 μg/L 4 04/19/2012 01:48 1,3-Dichlorobenzene 20 40 μg/L 4 04/19/2012 01:48 1,4-Dichlorobenzene 20 40 μg/L 4 04/19/2012 01:48 2,4,6-Trichlorophenol 20 40 μg/L 4 04/19/2012 01:48 2,4-Dichlorophenol 20 40 μg/L 4 04/19/2012 01:48 2,4-Dimethylphenol 20 40 μg/L 4 04/19/2012 01:48 2,4-Dinitrophenol 20 200 μg/L 4 04/19/2012 01:48 2,4-Dinitrotoluene 20 40 μg/L 4 04/19/2012 01:48 2,6-Dinitrotoluene 20 40 μg/L 4 04/19/2012 01:48 2-Chloro-Naphthalene 20 40 μg/L 4 04/19/2012 01:48



# 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: 101 Inf
Lab Order: G1204400 Project: Permit Renewal Sampled By: Client
Lab ID: G1204400-001 Collection Date: 04/10/2012 10:00
Matrix: Aqueous Received Date: 04/10/2012 18:07
Analyses Result QL Q Units DF Date Analyzed



### Page 4 of 72-Chlorophenol 20 40 μg/L 4 04/19/2012 01:48

2-Methyl-4,6-dinitrophenol 20 200 μg/L 4 04/19/2012 01:48 2-Nitrophenol 20 40 μg/L 4 04/19/2012 01:48 3,3-Dichlorobenzidine 20 200 μg/L 4 04/19/2012 01:48 4-Bromophenylphenylether 20 40 μg/L 4 04/19/2012 01:48 4-Chloro-3-methylphenol 20 40 μg/L 4 04/19/2012 01:48 4-Chlorophenylphenylether 20 40 μg/L 4 04/19/2012 01:48 4-Nitrophenol 20 200 μg/L 4 04/19/2012 01:48 Acenaphthene 20 40 μg/L 4 04/19/2012 01:48 Acenaphthylene 20 40 μg/L 4 04/19/2012 01:48
Anthracene 20 40 μg/L 4 04/19/2012 01:48
Azobenzene 20 40 μg/L 4 04/19/2012 01:48
Benzidine 20 40 μg/L 4 04/19/2012 01:48 Benzo(a)anthracene 20 40 μg/L 4 04/19/2012 01:48 Benzo(a)pyrene 20 40 μg/L 4 04/19/2012 01:48 Benzo(b)fluoranthene 20 40 μg/L 4 04/19/2012 01:48 Benzo(g,h,i)perylene 20 40 μg/L 4 04/19/2012 01:48 Benzo(k)fluoranthene 20 40 μg/L 4 04/19/2012 01:48 bis(2-Chloroethoxy)methane 20 40 μg/L 4 04/19/2012 01:48 bis(2-Chloroethyl)ether 20 40 μg/L 4 04/19/2012 01:48 bis(2-Chloroisopropyl)ether 20 40 μg/L 4 04/19/2012 01:48 bis(2-Ethylhexyl)phthalate 8.0 20 μg/L 4 04/19/2012 01:48 Butyl benzylphthalate 20 40 μg/L 4 04/19/2012 01:48 Chrysene 20 40 μg/L 4 04/19/2012 01:48 Di-N-Butyl Phthalate 20 40 μg/L 4 04/19/2012 01:48 Di-N-Octylphthalate 20 40 μg/L 4 04/19/2012 01:48 Di-n-propylnitrosamine 20 40 μg/L 4 04/19/2012 01:48 Dibenzo(a,h)anthracene 20 40 μg/L 4 04/19/2012 01:48 Diethyl Phthalate 20 40 μg/L 4 04/19/2012 01:48 Dimethyl Phthalate 20 40 μg/L 4 04/19/2012 01:48
Fluoranthene 20 40 μg/L 4 04/19/2012 01:48
Fluorene 20 40 μg/L 4 04/19/2012 01:48
Hexachlorobenzene 20 40 μg/L 4 04/19/2012 01:48
Hexachlorobutadiene 20 40 μg/L 4 04/19/2012 01:48 Hexachlorocyclopentadiene 20 200 μg/L 4 04/19/2012 01:48



# 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: 101 Inf
Lab Order: G1204400 Project: Permit Renewal Sampled By: Client
Lab ID: G1204400-001 Collection Date: 04/10/2012 10:00
Matrix: Aqueous Received Date: 04/10/2012 18:07
Analyses Result QL Q Units DF Date Analyzed



### Page 5 of 7Hexachloroethane 20 40 μg/L 4 04/19/2012 01:48

Indeno(1,2,3-cd)pyrene 20 40 μg/L 4 04/19/2012 01:48 Isophorone 8.0 20 μg/L 4 04/19/2012 01:48 n-Nitrosodimethylamine 20 40 μg/L 4 04/19/2012 01:48 n-Nitrosodiphenylamine 40 80 μg/L 4 04/19/2012 01:48 Naphthalene 20 40 μg/L 4 04/19/2012 01:48
Nitrobenzene 20 40 μg/L 4 04/19/2012 01:48 Pentachlorophenol 20 200 μg/L 4 04/19/2012 01:48
Phenanthrene 20 40 μg/L 4 04/19/2012 01:48
Phenol 20 40 μg/L 4 04/19/2012 01:48 Pyrene 20 40 μg/L 4 04/19/2012 01:48 TIC: 2-[2-[2-[2-[2-(2-Methoxyethoxy)eth NA 16 μg/L 4 04/19/2012 01:48 TIC: 3-Pentanol, 3-ethyl- NA 16 μg/L 4 04/19/2012 01:48
TIC: Chloroiodomethane NA 16 μg/L 4 04/19/2012 01:48 TIC: Ethanol, 2-(2-ethoxyethoxy)- NA 16 μg/L 4 04/19/2012 01:48 TIC: Methane, bromodichloro- NA 16 μg/L 4 04/19/2012 01:48 TIC: Pentane, 1-chloro-5-iodo- NA 16 μg/L 4 04/19/2012 01:48

Volatile Organic Compounds EPA 624 Analyst: SJM 1,1,1-Trichloroethane 0.200 0.5 μg/L 1 04/11/2012 14:45 1,1,2,2-Tetrachloroethane 0.200 0.5 μg/L 1 04/11/2012 14:45 1,1,2-Trichloroethane 0.500 1.0 μg/L 1 04/11/2012 14:45 1,1-Dichloroethane 0.200 0.5 μg/L 1 04/11/2012 14:45 1,1-Dichloroethene 0.200 0.5 μg/L 1 04/11/2012 14:45 1,2-Dichloroethane 0.200 0.5 μg/L 1 04/11/2012 14:45 1,2-Dichloropropane 0.200 0.5 μg/L 1 04/11/2012 14:45 2-Chloroethylvinyl ether 0.500 1.0 μg/L 1 04/11/2012 14:45
Benzene 0.200 0.5 μg/L 1 04/11/2012 14:45
Bromoform 0.200 0.5 μg/L 1 04/11/2012 14:45
Bromomethane 0.500 1.0 μg/L 1 04/11/2012 14:45
Carbon Tetrachloride 0.200 0.5 μg/L 1 04/11/2012 14:45
Chlorobenzene 0.200 0.5 μg/L 1 04/11/2012 14:45
Chlorodibromomethane 0.400 1.0 μg/L 1 04/11/2012 14:45
Chloroethane 0.200 0.5 μg/L 1 04/11/2012 14:45
Chloroform 0.200 0.5 μg/L 1 04/11/2012 14:45



# 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: 101 Inf
Lab Order: G1204400 Project: Permit Renewal Sampled By: Client
Lab ID: G1204400-001 Collection Date: 04/10/2012 10:00
Matrix: Aqueous Received Date: 04/10/2012 18:07
Analyses Result QL Q Units DF Date Analyzed



### Page 6 of 7Chloromethane 0.200 0.5 μg/L 1 04/11/2012 14:45

Dichlorobromomethane 0.200 0.5 μg/L 1 04/11/2012 14:45 Ethylbenzene 0.200 0.5 μg/L 1 04/11/2012 14:45 Methylene Chloride 0.200 0.5 μg/L 1 04/11/2012 14:45
Tetrachloroethene 0.200 0.5 μg/L 1 04/11/2012 14:45
Toluene 0.200 0.5 μg/L 1 04/11/2012 14:45 trans-1,2-Dichloroethene 0.500 1.0 μg/L 1 04/11/2012 14:45
Trichloroethene 0.200 0.5 μg/L 1 04/11/2012 14:45 Vinyl Chloride 0.200 0.5 μg/L 1 04/11/2012 14:45 1,3-Dichloropropylene 0.200 0.5 μg/L 1 04/11/2012 14:45 TIC: Methyl Ethyl Ketone. NA 3.0 1 04/11/2012 14:45 TIC: Tetrahydrofuran. NA 3.0 1 04/11/2012 14:45

Volatile Organic Compounds EPA 624 Analyst: SJM
Acrolein 2.00 5.00 μg/L 1 04/11/2012 14:45 Acrylonitrile 0.500 1.00 μg/L 1 04/11/2012 14:45

Indicator Organic Parameters EPA 1664 Analyst: AMS
Oil & Grease 2.06 5 mg/L 1.03 04/17/2012 07:23

Indicator Organic Parameters SM 20 5310-C Analyst: ACG Total Organic Carbon 3.7 0.5 mg/L 1 04/12/2012 19:54



# 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: 101 Inf
Lab Order: G1204400 Project: Permit Renewal Sampled By: Client
Lab ID: G1204400-001 Collection Date: 04/10/2012 10:00
Matrix: Aqueous Received Date: 04/10/2012 18:07
Analyses Result QL Q Units DF Date Analyzed



### Page 7 of 7