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

REVISED REPORT: TCLP Boron added. REVISED REPORT: Benzo(a)pyrene, 1,2-Dibromomethane and

methylene chloride added to report.

2005 N. Center Ave.

Somerset PA 15501

814-443-1671

814-445-6666

FAX:814-445-6729

Client: GenOn ENERGY INC. - CONEMAUGH STATION

Project: CASE NARRATIVE

Lab Order: G1203A13

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 6
ASTM Inorganic Non-Metals EPA 300.0 Analyst: CAS

 Chloride 29.9 1.0 mg/L 1 03/28/2012 14:16

 Fluoride < 0.1 0.1 mg/L 1 03/28/2012 14:16

 Sulfate 1360 2.0 mg/L 1 03/28/2012 14:16

Inorganic Non-Metals SM2540-C Analyst: KLS

 Total dissolved Solids, ASTM 4820 20.0 mg/L 1 03/28/2012 11:31

ASTM Cyanide SM 4500-CN_C&E Analyst: SAG

 Cyanide, ASTM < 0.10 0.10 mg/L 1 03/28/2012 14:39

Reactive Cyanide SW 846 Ch.7 Analyst: MLR

 Reactive cyanide < 0.25 0.25 mg/Kg 1 03/28/2012 18:17

Inorganic Non-Metals HACH 8000 Analyst: SEM

 Chemical Oxygen Demand, ASTM < 15 15 mg/L 1 03/28/2012 16:15

Semi-Volatile Compounds EPA 8270 Analyst: JB

 Benzo(a)pyrene < 10 10 μg/L 1 03/29/2012 05:49

TCLP Herbicides EPA 8151 Analyst: TEW

 2,4-D < 0.020 0.020 mg/L 1 04/03/2012 21:38

 Silvex < 0.0050 0.0050 mg/L 1 04/03/2012 21:38

TCLP Herbicides EPA 8151 Analyst: TEW

 Pentachlorophenol < 50 50 μg/L 1 04/03/2012 21:38

TCLP Metals EPA 7470 Analyst: JEK

 Mercury < 0.0002 0.0002 mg/L 1 04/02/2012 07:38

Mercury ASTM D6722 Analyst: GAL

 Mercury < 0.011 0.011 mg/Kg-dry 1 03/27/2012 18:34

Laboratory Results

2005 N. Center Ave.

Somerset PA 15501

814-443-1671

814-445-6666

FAX:814-445-6729

Client: GenOn ENERGY INC. - CONEMAUGH STATION Client Sample ID: Metals Sludge Boron WWT Filter Cake

Lab Order: G1203A13

Project: Sampled By: Client

Lab ID: G1203A13-001 Collection Date: 03/26/2012 10:25

Matrix: Sludge Received Date: 03/27/2012 06:53

Analyses Result QL Q Units DF Date Analyzed

Page 2 of 6
Ignitability EPA 1030 Analyst: RLL

 Ignitability of Solids Nonflammable 1.0 mm/sec 1 03/28/2012 11:56

 Burning Rate #1 NA 0 mm/sec 1 03/28/2012 11:56

 Burning Rate #2 NA 0 mm/sec 1 03/28/2012 11:56

 Burning Rate #3 NA 0 mm/sec 1 03/28/2012 11:56

 Metallic or Nonmetallic Nonmetallic 0 mm/sec 1 03/28/2012 11:56

Inorganic Non-Metals EPA 351.2 Analyst: SLY

 Total Kjeldahl Nitrogen, ASTM < 1.00 1.00 mg/L as N 1 04/03/2012 09:34

TCLP Metals EPA 6010 Analyst: MS

 Aluminum < 0.1 0.1 mg/L 1 03/28/2012 22:08

 Antimony < 0.02 0.02 mg/L 1 03/28/2012 22:08

 Arsenic < 0.02 0.02 mg/L 1 03/28/2012 22:08

 Barium < 0.3 0.3 mg/L 1 03/28/2012 22:08

 Beryllium < 0.001 0.001 mg/L 1 03/28/2012 22:08

 Boron 990 0.05 mg/L 1 03/28/2012 22:08

 Cadmium < 0.002 0.002 mg/L 1 03/28/2012 22:08

 Chromium < 0.01 0.01 mg/L 1 03/28/2012 22:08

 Copper < 0.01 0.01 mg/L 1 03/28/2012 22:08

 Iron < 0.05 0.05 mg/L 1 03/28/2012 22:08

 Lead < 0.02 0.02 mg/L 1 03/28/2012 22:08

 Manganese 0.08 0.01 mg/L 1 03/28/2012 22:08

 Nickel 0.05 0.01 mg/L 1 03/28/2012 22:08

 Selenium < 0.02 0.02 mg/L 1 03/28/2012 22:08

 Silver < 0.005 0.005 mg/L 1 03/28/2012 22:08

 Zinc < 0.01 0.01 mg/L 1 03/28/2012 22:08

TCLP Metals EPA 6020 Analyst: JEK

 Thallium < 0.0010 0.0010 mg/L 5 04/04/2012 14:12

Physical Tests ASTM D 3302 Analyst: GAK

 Percent Moisture 45.1 1.00 % 1 03/27/2012 08:20

Inorganics Non Metals EPA 350.1 Analyst: SLY

Laboratory Results

2005 N. Center Ave.

Somerset PA 15501

814-443-1671

814-445-6666

FAX:814-445-6729

Client: GenOn ENERGY INC. - CONEMAUGH STATION Client Sample ID: Metals Sludge Boron WWT Filter Cake

Lab Order: G1203A13

Project: Sampled By: Client

Lab ID: G1203A13-001 Collection Date: 03/26/2012 10:25

Matrix: Sludge Received Date: 03/27/2012 06:53

Analyses Result QL Q Units DF Date Analyzed

Page 3 of 6
 Ammonia Nitrogen, ASTM < 0.10 0.10 mg/L 1 03/29/2012 15:30

Inorganic Non Metals SM 4500-NO2B Analyst: MLR

 Nitrite Nitrogen, ASTM < 0.050 0.050 mg/L 1 03/28/2012 11:06

Inorganics Non Metals EPA 353.2 Analyst: SLY

 Nitrate Nitrogen, ASTM < 0.050 0.050 mg/L as N 1 04/02/2012 12:08

Physical Tests EPA 9071 Analyst: ACG

 Oil & Grease, as rec < 100 100 mg/Kg 1 03/29/2012 13:31

Indicator Organics - ASTM Extraction EPA 1664 Analyst: ACG

 Oil & Grease ASTM < 9.80 9.80 mg/L 1 03/29/2012 13:12

Physical Tests EPA 9095 Analyst: KMG

 Paint Filter Test No Free

Liquid 1.0 1 03/27/2012 11:21

Solid pH EPA 9045 Analyst: GAK

 Solid pH 9.61 1.00 su 1 03/27/2012 11:42

 Temperature 19.40 0 su 1 03/27/2012 11:42

PCB Analysis EPA 8082 Analyst: TEW

 PCB 1016 < 0.050 0.050 mg/Kg 1 03/29/2012 23:21

 PCB 1221 < 0.050 0.050 mg/Kg 1 03/29/2012 23:21

 PCB 1232 < 0.050 0.050 mg/Kg 1 03/29/2012 23:21

 PCB 1242 < 0.050 0.050 mg/Kg 1 03/29/2012 23:21

 PCB 1248 < 0.050 0.050 mg/Kg 1 03/29/2012 23:21

 PCB 1254 < 0.050 0.050 mg/Kg 1 03/29/2012 23:21

 PCB 1260 < 0.050 0.050 mg/Kg 1 03/29/2012 23:21

TCLP Pesticides EPA 8081 Analyst: TEW

 Chlordane < 0.010 0.010 mg/L 1 04/02/2012 21:57

 Endrin < 0.00050 0.00050 mg/L 1 04/02/2012 21:57

 Lindane < 0.00050 0.00050 mg/L 1 04/02/2012 21:57

Laboratory Results

2005 N. Center Ave.

Somerset PA 15501

814-443-1671

814-445-6666

FAX:814-445-6729

Client: GenOn ENERGY INC. - CONEMAUGH STATION Client Sample ID: Metals Sludge Boron WWT Filter Cake

Lab Order: G1203A13

Project: Sampled By: Client

Lab ID: G1203A13-001 Collection Date: 03/26/2012 10:25

Matrix: Sludge Received Date: 03/27/2012 06:53

Analyses Result QL Q Units DF Date Analyzed

Page 4 of 6
 Methoxychlor < 0.00050 0.00050 mg/L 1 04/02/2012 21:57

 Toxaphene < 0.020 0.020 mg/L 1 04/02/2012 21:57

 Heptachlor (and its epoxide) < 0.0010 0.0010 mg/L 1 04/02/2012 21:57

Total Solid Analysis EPA 9065 Analyst: MLS

 Phenolics < 100 100 mg/Kg 5 03/29/2012 16:19

Reactive Sulfide SW 846 Ch.7 Analyst: MLR

 Reactive sulfide 2.7 0.25 mg/Kg 1 03/28/2012 17:37

TCLP Volatile Organic Compounds EPA 8260 Analyst: JAW

 1,1,1-Trichloroethane < 50 50 μg/L 50 03/28/2012 13:31

 1,1-Dichloroethane < 50 50 μg/L 50 03/28/2012 13:31

 1,1-Dichloroethene < 50 50 μg/L 50 03/28/2012 13:31

 1,2-Dichloroethane < 50 50 μg/L 50 03/28/2012 13:31

 1,4-Dichlorobenzene < 50 50 μg/L 50 03/28/2012 13:31

 Benzene < 50 50 μg/L 50 03/28/2012 13:31

 Carbon Tetrachloride < 50 50 μg/L 50 03/28/2012 13:31

 Chlorobenzene < 50 50 μg/L 50 03/28/2012 13:31

 cis-1,2-Dichloroethene < 50 50 μg/L 50 03/28/2012 13:31

 Ethylbenzene < 50 50 μg/L 50 03/28/2012 13:31

 Methyl Ethyl Ketone < 250 250 μg/L 50 03/28/2012 13:31

 Tetrachloroethene < 50 50 μg/L 50 03/28/2012 13:31

 Toluene < 50 50 μg/L 50 03/28/2012 13:31

 trans-1,2-Dichloroethene < 50 50 μg/L 50 03/28/2012 13:31

 Trichloroethene < 50 50 μg/L 50 03/28/2012 13:31

 Trichloromethane < 50 50 μg/L 50 03/28/2012 13:31

 Vinyl Chloride < 50 50 μg/L 50 03/28/2012 13:31

 Total Xylene < 100 100 μg/L 50 03/28/2012 13:31

TCLP ZHE Extraction EPA 1311 Analyst: GAK

 TCLP, ZHE 8.0 1.0 1 03/27/2012 11:52

TCLP EXTRACTION EPA 1311 Analyst: GAK

 pH with HCl 8.1 0 1 03/27/2012 11:52

Laboratory Results

2005 N. Center Ave.

Somerset PA 15501

814-443-1671

814-445-6666

FAX:814-445-6729

Client: GenOn ENERGY INC. - CONEMAUGH STATION Client Sample ID: Metals Sludge Boron WWT Filter Cake

Lab Order: G1203A13

Project: Sampled By: Client

Lab ID: G1203A13-001 Collection Date: 03/26/2012 10:25

Matrix: Sludge Received Date: 03/27/2012 06:53

Analyses Result QL Q Units DF Date Analyzed

Page 5 of 6
 Extraction Fluid Used 2.0 0 1 03/27/2012 11:52

 Initial pH 10 1.0 1 03/27/2012 11:52

 Final pH 7.3 1.0 1 03/27/2012 11:52

 TCLP, non-volatile NA 1.0 1 03/27/2012 11:52

Semi-Volatile Compounds: TCLP EPA 8270 Analyst: JB

 2-Methylphenol < 100 100 μg/L 1 03/29/2012 05:49

 2,4-Dinitrotoluene < 100 100 μg/L 1 03/29/2012 05:49

 Hexachlorobenzene < μg/L 1 03/29/2012 05:49

 Hexachlorobutadiene < 100 100 μg/L 1 03/29/2012 05:49

 Hexachloroethane < 100 100 μg/L 1 03/29/2012 05:49

 Nitrobenzene < 100 100 μg/L 1 03/29/2012 05:49

 Pentachlorophenol < 500 500 μg/L 1 03/29/2012 05:49

 Pyridine < 200 200 μg/L 1 03/29/2012 05:49

 2,4,5-Trichlorophenol < 100 100 μg/L 1 03/29/2012 05:49

 2,4,6-Trichlorophenol < 100 100 μg/L 1 03/29/2012 05:49

 3,4-Methylphenol < 100 100 μg/L 1 03/29/2012 05:49

Indicator Organic Parameters EPA 9020 Analyst: MTM

 Total Organic Halogen, ASTM 22 20 μg/L 1 04/05/2012 10:36

Extractable Petroleum Hydrocarbons SM 5520F Analyst: ACG

 Total Petroleum Hydrocarbons < 250 250 mg/Kg 1 03/29/2012 13:25

Inorganics Non Metals SM 2540B Analyst: KLS

 Total solids, ASTM 5500 10 mg/L 1 03/28/2012 11:30

Volatile Organics EPA 8260 Analyst: JAW

 1,2-Dibromoethane, TCLP < 0.025 0.025 mg/L 50 03/28/2012 13:31

 Methylene Chloride, TCLP < 0.050 0.050 mg/L 50 03/28/2012 13:31

ASTM Extraction ASTM D 3987 Analyst: GAK

 % Moisture 45.1 0.01 % 1 03/27/2012 11:30

 Final pH 9.6 1.0 % 1 03/27/2012 11:30

 Solids, gram/gram 0.55 0.10 % 1 03/27/2012 11:30

Laboratory Results

2005 N. Center Ave.

Somerset PA 15501

814-443-1671

814-445-6666

FAX:814-445-6729

Client: GenOn ENERGY INC. - CONEMAUGH STATION Client Sample ID: Metals Sludge Boron WWT Filter Cake

Lab Order: G1203A13

Project: Sampled By: Client

Lab ID: G1203A13-001 Collection Date: 03/26/2012 10:25

Matrix: Sludge Received Date: 03/27/2012 06:53

Analyses Result QL Q Units DF Date Analyzed

Page 6 of 6