EPA REFERENCE METHOD 0030

Volatile Organic Sampling Train (VOST)

Test 1 Summary

Client NRG Energy Inc. Date 2/24/2010

Facility Vienna Job Number 902637

Unit 8 Operator JW-BD

Location Stack

TEST 1 Summary Time:Start 9:44 End 11:35 Date 2/24/2010

Carbon Dioxide 10.90 % Oxygen 6.80 %

Sample Gas Volume 2.806 dscf F-Factor 9518

Heat Input NA mmBtu/hr

Detection ug/dscm

Element Status ug ug/dscf ug/dscm lbs/mmBtu @7%O2

Dichlorodifluoromethane (Freon 12) BDL 8.874E-07 0.99

Chloromethane BDL 8.874E-07 0.99

Vinyl chloride BDL 4.437E-07 0.50

Bromomethane ADL 5.117E-06 5.72

Chloroethane BDL 3.993E-07 0.45

Trichlorofluoromethane (Freon 11) DLL 5.561E-07 0.62

Acetone (2-Propanone) ADL 1.784E-05 19.95

1,1-Dichloroethylene BDL 4.437E-07 0.50

Iodomethane DLL 1.112E-06 1.24

Carbon disulfide BDL 1.331E-06 1.49

Methylene Chloride (Dichloromethane) ADL 1.288E-05 14.40

1,1-Dichloroethane BDL 4.437E-07 0.50

trans-1,2-Dichloroethylene BDL 4.437E-07 0.50

cis-1,2-Dichloroethylene BDL 4.437E-07 0.50

Chloroform BDL 4.437E-07 0.50

1,2-Dichloroethane BDL 9.998E-07 1.12

Methyl Ethyl Ketone (2-Butanone) DLL 2.786E-06 3.12

1,1,1-Trichloroethane BDL 4.437E-07 0.50

Carbon Tetrachloride BDL 8.874E-07 0.99

Benzene ADL 2.226E-05 24.89

1,1,2-Trichloroethane BDL 8.874E-07 0.99

1,2-Dichloropropane BDL 4.437E-07 0.50

Trichloroethylene BDL 4.437E-07 0.50

Dibromomethane BDL 4.437E-07 0.50

Bromodichloromethane BDL 4.437E-07 0.50

cis-1,3-Dichloropropene BDL 4.437E-07 0.50
trans-1,3-Dichloropropene BDL 3.106E-07 0.35

Dibromochloromethane BDL 1.366E-06 1.53

Methyl Isobutyl Ketone DLL 8.874E-07 0.99

Methyl Butyl Ketone (2-Hexanone) DLL 1.556E-06 1.74

Toluene ADL 1.438E-05 16.08

Ethylene Dibromide BDL 4.437E-07 0.50

Tetrachloroethylene BDL 8.874E-07 0.99

Chlorobenzene BDL 4.437E-07 0.50

1,1,1,2-Tetrachloroethane BDL 4.437E-07 0.50

Ethylbenzene DLL 5.561E-07 0.62

m / p-Xylene DLL 1.562E-06 1.75

Styrene BDL 4.437E-07 0.50

o-Xylene DLL 8.874E-07 0.99

Bromoform BDL 4.437E-07 0.50

1,1,2,2-Tetrachloroethane BDL 4.437E-07 0.50

1,2,3-Trichloropropane BDL 8.874E-07 0.99

1,3-Dichlorobenzene BDL 8.874E-07 0.99

1,4-Dichlorobenzene BDL 8.874E-07 0.99

1,2-Dichlorobenzene BDL 8.874E-07 0.99

Total VOC 1.03E-04

BDL = Below Detection Limit - All fractions below detection limit

DLL = Detection Limit Limited - Some fractions below detection limit

ADL = Above Detection Limit - All fractions above detection limit

EMSI
 EPA REFERENCE METHOD 0030

Volatile Organic Sampling Train (VOST)

Test 1 Run 1

Client NRG Energy Inc. Date 2/24/2010

Facility Vienna Job Number 902637

Unit 8 Operator JW-BD

Location Stack

TEST 1 Run 1 Time:Start 9:44 End 10:04 Date 2/24/2010

Carbon Dioxide 10.90 % Oxygen 6.80 %

Sample Gas Volume 0.692 dscf F-Factor 9518

Heat Input NA mmBtu/hr

Detection ug/dscm

Element Status ug ug/dscf ug/dscm lbs/mmBtu @7%O2

Dichlorodifluoromethane (Freon 12) BDL 0.020 0.03 1.0 8.989E-07 1.01

Chloromethane BDL 0.020 0.03 1.0 8.989E-07 1.01

Vinyl chloride BDL 0.010 0.01 0.5 4.495E-07 0.50

Bromomethane ADL 0.150 0.22 7.6 6.742E-06 7.54

Chloroethane BDL 0.009 0.01 0.5 4.045E-07 0.45

Trichlorofluoromethane (Freon 11) ADL 0.020 0.03 1.0 8.989E-07 1.01

Acetone (2-Propanone) ADL 1.100 1.59 56.1 4.944E-05 55.29

1,1-Dichloroethylene BDL 0.010 0.01 0.5 4.495E-07 0.50

Iodomethane ADL 0.040 0.06 2.0 1.798E-06 2.01

Carbon disulfide BDL 0.030 0.04 1.5 1.348E-06 1.51

Methylene Chloride (Dichloromethane) ADL 0.980 1.42 50.0 4.405E-05 49.25

1,1-Dichloroethane BDL 0.010 0.01 0.5 4.495E-07 0.50

trans-1,2-Dichloroethylene BDL 0.010 0.01 0.5 4.495E-07 0.50

cis-1,2-Dichloroethylene BDL 0.010 0.01 0.5 4.495E-07 0.50

Chloroform BDL 0.010 0.01 0.5 4.495E-07 0.50

1,2-Dichloroethane BDL 0.030 0.04 1.5 1.348E-06 1.51

Methyl Ethyl Ketone (2-Butanone) ADL 0.130 0.19 6.6 5.843E-06 6.53

1,1,1-Trichloroethane BDL 0.010 0.01 0.5 4.495E-07 0.50

Carbon Tetrachloride BDL 0.020 0.03 1.0 8.989E-07 1.01

Benzene ADL 0.935 1.35 47.7 4.202E-05 46.99

1,1,2-Trichloroethane BDL 0.020 0.03 1.0 8.989E-07 1.01

1,2-Dichloropropane BDL 0.010 0.01 0.5 4.495E-07 0.50

Trichloroethylene BDL 0.010 0.01 0.5 4.495E-07 0.50

Dibromomethane BDL 0.010 0.01 0.5 4.495E-07 0.50

Bromodichloromethane BDL 0.010 0.01 0.5 4.495E-07 0.50

cis-1,3-Dichloropropene BDL 0.010 0.01 0.5 4.495E-07 0.50
trans-1,3-Dichloropropene BDL 0.007 0.01 0.4 3.146E-07 0.35

Dibromochloromethane BDL 0.009 0.01 0.5 4.045E-07 0.45

Methyl Isobutyl Ketone ADL 0.020 0.03 1.0 8.989E-07 1.01

Methyl Butyl Ketone (2-Hexanone) ADL 0.050 0.07 2.5 2.247E-06 2.51

Toluene ADL 0.730 1.05 37.2 3.281E-05 36.69

Ethylene Dibromide BDL 0.010 0.01 0.5 4.495E-07 0.50

Tetrachloroethylene BDL 0.020 0.03 1.0 8.989E-07 1.01

Chlorobenzene BDL 0.010 0.01 0.5 4.495E-07 0.50

1,1,1,2-Tetrachloroethane BDL 0.010 0.01 0.5 4.495E-07 0.50

Ethylbenzene ADL 0.020 0.03 1.0 8.989E-07 1.01

m / p-Xylene ADL 0.080 0.12 4.1 3.596E-06 4.02

Styrene BDL 0.010 0.01 0.5 4.495E-07 0.50

o-Xylene ADL 0.020 0.03 1.0 8.989E-07 1.01

Bromoform BDL 0.010 0.01 0.5 4.495E-07 0.50

1,1,2,2-Tetrachloroethane BDL 0.010 0.01 0.5 4.495E-07 0.50

1,2,3-Trichloropropane BDL 0.020 0.03 1.0 8.989E-07 1.01

1,3-Dichlorobenzene BDL 0.020 0.03 1.0 8.989E-07 1.01

1,4-Dichlorobenzene BDL 0.020 0.03 1.0 8.989E-07 1.01

1,2-Dichlorobenzene BDL 0.020 0.03 1.0 8.989E-07 1.01

Total VOC 2.12E-04

BDL = Below Detection Limit - All fractions below detection limit

DLL = Detection Limit Limited - Some fractions below detection limit

ADL = Above Detection Limit - All fractions above detection limit

EMSI
 EPA REFERENCE METHOD 0030

Volatile Organic Sampling Train (VOST)

Test 1 Run 2

Client NRG Energy Inc. Date 2/24/2010

Facility Vienna Job Number 902637

Unit 8 Operator JW-BD

Location Stack

TEST 1 Run 2 Time:Start 10:15 End 10:35 Date 2/24/2010

Carbon Dioxide 10.90 % Oxygen 6.80 %

Sample Gas Volume 0.707 dscf F-Factor 9518

Heat Input NA mmBtu/hr

Detection ug/dscm

Element Status ug ug/dscf ug/dscm lbs/mmBtu @7%O2

Dichlorodifluoromethane (Freon 12) BDL 0.020 0.03 1.0 8.800E-07 0.98

Chloromethane BDL 0.020 0.03 1.0 8.800E-07 0.98

Vinyl chloride BDL 0.010 0.01 0.5 4.400E-07 0.49

Bromomethane ADL 0.140 0.20 7.0 6.160E-06 6.89

Chloroethane BDL 0.009 0.01 0.4 3.960E-07 0.44

Trichlorofluoromethane (Freon 11) BDL 0.010 0.01 0.5 4.400E-07 0.49

Acetone (2-Propanone) ADL 0.170 0.24 8.5 7.480E-06 8.36

1,1-Dichloroethylene BDL 0.010 0.01 0.5 4.400E-07 0.49

Iodomethane BDL 0.020 0.03 1.0 8.800E-07 0.98

Carbon disulfide BDL 0.030 0.04 1.5 1.320E-06 1.48

Methylene Chloride (Dichloromethane) ADL 0.050 0.07 2.5 2.200E-06 2.46

1,1-Dichloroethane BDL 0.010 0.01 0.5 4.400E-07 0.49

trans-1,2-Dichloroethylene BDL 0.010 0.01 0.5 4.400E-07 0.49

cis-1,2-Dichloroethylene BDL 0.010 0.01 0.5 4.400E-07 0.49

Chloroform BDL 0.010 0.01 0.5 4.400E-07 0.49

1,2-Dichloroethane BDL 0.020 0.03 1.0 8.800E-07 0.98

Methyl Ethyl Ketone (2-Butanone) BDL 0.040 0.06 2.0 1.760E-06 1.97

1,1,1-Trichloroethane BDL 0.010 0.01 0.5 4.400E-07 0.49

Carbon Tetrachloride BDL 0.020 0.03 1.0 8.800E-07 0.98

Benzene ADL 0.411 0.58 20.5 1.808E-05 20.22

1,1,2-Trichloroethane BDL 0.020 0.03 1.0 8.800E-07 0.98

1,2-Dichloropropane BDL 0.010 0.01 0.5 4.400E-07 0.49

Trichloroethylene BDL 0.010 0.01 0.5 4.400E-07 0.49

Dibromomethane BDL 0.010 0.01 0.5 4.400E-07 0.49

Bromodichloromethane BDL 0.010 0.01 0.5 4.400E-07 0.49

cis-1,3-Dichloropropene BDL 0.010 0.01 0.5 4.400E-07 0.49
trans-1,3-Dichloropropene BDL 0.007 0.01 0.3 3.080E-07 0.34

Dibromochloromethane BDL 0.009 0.01 0.4 3.960E-07 0.44

Methyl Isobutyl Ketone BDL 0.020 0.03 1.0 8.800E-07 0.98

Methyl Butyl Ketone (2-Hexanone) BDL 0.030 0.04 1.5 1.320E-06 1.48

Toluene ADL 0.210 0.30 10.5 9.240E-06 10.33

Ethylene Dibromide BDL 0.010 0.01 0.5 4.400E-07 0.49

Tetrachloroethylene BDL 0.020 0.03 1.0 8.800E-07 0.98

Chlorobenzene BDL 0.010 0.01 0.5 4.400E-07 0.49

1,1,1,2-Tetrachloroethane BDL 0.010 0.01 0.5 4.400E-07 0.49

Ethylbenzene BDL 0.010 0.01 0.5 4.400E-07 0.49

m / p-Xylene BDL 0.020 0.03 1.0 8.800E-07 0.98

Styrene BDL 0.010 0.01 0.5 4.400E-07 0.49

o-Xylene BDL 0.020 0.03 1.0 8.800E-07 0.98

Bromoform BDL 0.010 0.01 0.5 4.400E-07 0.49

1,1,2,2-Tetrachloroethane BDL 0.010 0.01 0.5 4.400E-07 0.49

1,2,3-Trichloropropane BDL 0.020 0.03 1.0 8.800E-07 0.98

1,3-Dichlorobenzene BDL 0.020 0.03 1.0 8.800E-07 0.98

1,4-Dichlorobenzene BDL 0.020 0.03 1.0 8.800E-07 0.98

1,2-Dichlorobenzene BDL 0.020 0.03 1.0 8.800E-07 0.98

Total VOC 6.98E-05

BDL = Below Detection Limit - All fractions below detection limit

DLL = Detection Limit Limited - Some fractions below detection limit

ADL = Above Detection Limit - All fractions above detection limit

EMSI
 EPA REFERENCE METHOD 0030

Volatile Organic Sampling Train (VOST)

Test 1 Run 3

Client NRG Energy Inc. Date 2/24/2010

Facility Vienna Job Number 902637

Unit 8 Operator JW-BD

Location Stack

TEST 1 Run 3 Time:Start 10:45 End 11:05 Date 2/24/2010

Carbon Dioxide 10.90 % Oxygen 6.80 %

Sample Gas Volume 0.724 dscf F-Factor 9518

Heat Input NA mmBtu/hr

Detection ug/dscm

Element Status ug ug/dscf ug/dscm lbs/mmBtu @7%O2

Dichlorodifluoromethane (Freon 12) BDL 0.020 0.03 1.0 8.589E-07 0.96

Chloromethane BDL 0.020 0.03 1.0 8.589E-07 0.96

Vinyl chloride BDL 0.010 0.01 0.5 4.294E-07 0.48

Bromomethane ADL 0.070 0.10 3.4 3.006E-06 3.36

Chloroethane BDL 0.009 0.01 0.4 3.865E-07 0.43

Trichlorofluoromethane (Freon 11) BDL 0.010 0.01 0.5 4.294E-07 0.48

Acetone (2-Propanone) ADL 0.230 0.32 11.2 9.877E-06 11.04

1,1-Dichloroethylene BDL 0.010 0.01 0.5 4.294E-07 0.48

Iodomethane BDL 0.020 0.03 1.0 8.589E-07 0.96

Carbon disulfide BDL 0.030 0.04 1.5 1.288E-06 1.44

Methylene Chloride (Dichloromethane) ADL 0.080 0.11 3.9 3.435E-06 3.84

1,1-Dichloroethane BDL 0.010 0.01 0.5 4.294E-07 0.48

trans-1,2-Dichloroethylene BDL 0.010 0.01 0.5 4.294E-07 0.48

cis-1,2-Dichloroethylene BDL 0.010 0.01 0.5 4.294E-07 0.48

Chloroform BDL 0.010 0.01 0.5 4.294E-07 0.48

1,2-Dichloroethane BDL 0.020 0.03 1.0 8.589E-07 0.96

Methyl Ethyl Ketone (2-Butanone) BDL 0.040 0.06 1.9 1.718E-06 1.92

1,1,1-Trichloroethane BDL 0.010 0.01 0.5 4.294E-07 0.48

Carbon Tetrachloride BDL 0.020 0.03 1.0 8.589E-07 0.96

Benzene ADL 0.367 0.51 17.9 1.576E-05 17.62

1,1,2-Trichloroethane BDL 0.020 0.03 1.0 8.589E-07 0.96

1,2-Dichloropropane BDL 0.010 0.01 0.5 4.294E-07 0.48

Trichloroethylene BDL 0.010 0.01 0.5 4.294E-07 0.48

Dibromomethane BDL 0.010 0.01 0.5 4.294E-07 0.48

Bromodichloromethane BDL 0.010 0.01 0.5 4.294E-07 0.48

cis-1,3-Dichloropropene BDL 0.010 0.01 0.5 4.294E-07 0.48
trans-1,3-Dichloropropene BDL 0.007 0.01 0.3 3.006E-07 0.34

Dibromochloromethane BDL 0.099 0.14 4.8 4.251E-06 4.75

Methyl Isobutyl Ketone BDL 0.020 0.03 1.0 8.589E-07 0.96

Methyl Butyl Ketone (2-Hexanone) BDL 0.030 0.04 1.5 1.288E-06 1.44

Toluene ADL 0.190 0.26 9.3 8.159E-06 9.12

Ethylene Dibromide BDL 0.010 0.01 0.5 4.294E-07 0.48

Tetrachloroethylene BDL 0.020 0.03 1.0 8.589E-07 0.96

Chlorobenzene BDL 0.010 0.01 0.5 4.294E-07 0.48

1,1,1,2-Tetrachloroethane BDL 0.010 0.01 0.5 4.294E-07 0.48

Ethylbenzene BDL 0.010 0.01 0.5 4.294E-07 0.48

m / p-Xylene ADL 0.020 0.03 1.0 8.589E-07 0.96

Styrene BDL 0.010 0.01 0.5 4.294E-07 0.48

o-Xylene BDL 0.020 0.03 1.0 8.589E-07 0.96

Bromoform BDL 0.010 0.01 0.5 4.294E-07 0.48

1,1,2,2-Tetrachloroethane BDL 0.010 0.01 0.5 4.294E-07 0.48

1,2,3-Trichloropropane BDL 0.020 0.03 1.0 8.589E-07 0.96

1,3-Dichlorobenzene BDL 0.020 0.03 1.0 8.589E-07 0.96

1,4-Dichlorobenzene BDL 0.020 0.03 1.0 8.589E-07 0.96

1,2-Dichlorobenzene BDL 0.020 0.03 1.0 8.589E-07 0.96

Total VOC 7.01E-05

BDL = Below Detection Limit - All fractions below detection limit

DLL = Detection Limit Limited - Some fractions below detection limit

ADL = Above Detection Limit - All fractions above detection limit

EMSI
 EPA REFERENCE METHOD 0030

Volatile Organic Sampling Train (VOST)

Test 1 Run 4

Client NRG Energy Inc. Date 2/24/2010

Facility Vienna Job Number 902637

Unit 8 Operator JW-BD

Location Stack

TEST 1 Run 4 Time:Start 11:15 End 11:35 Date 2/24/2010

Carbon Dioxide 10.90 % Oxygen 6.80 %

Sample Gas Volume 0.682 dscf F-Factor 9518

Heat Input NA mmBtu/hr

Detection ug/dscm

Element Status ug ug/dscf ug/dscm lbs/mmBtu @7%O2

Dichlorodifluoromethane (Freon 12) BDL 0.020 0.03 1.0 9.120E-07 1.02

Chloromethane BDL 0.020 0.03 1.0 9.120E-07 1.02

Vinyl chloride BDL 0.010 0.01 0.5 4.560E-07 0.51

Bromomethane ADL 0.100 0.15 5.2 4.560E-06 5.10

Chloroethane BDL 0.009 0.01 0.5 4.104E-07 0.46

Trichlorofluoromethane (Freon 11) BDL 0.010 0.01 0.5 4.560E-07 0.51

Acetone (2-Propanone) ADL 0.100 0.15 5.2 4.560E-06 5.10

1,1-Dichloroethylene BDL 0.010 0.01 0.5 4.560E-07 0.51

Iodomethane BDL 0.020 0.03 1.0 9.120E-07 1.02

Carbon disulfide BDL 0.030 0.04 1.6 1.368E-06 1.53

Methylene Chloride (Dichloromethane) ADL 0.040 0.06 2.1 1.824E-06 2.04

1,1-Dichloroethane BDL 0.010 0.01 0.5 4.560E-07 0.51

trans-1,2-Dichloroethylene BDL 0.010 0.01 0.5 4.560E-07 0.51

cis-1,2-Dichloroethylene BDL 0.010 0.01 0.5 4.560E-07 0.51

Chloroform BDL 0.010 0.01 0.5 4.560E-07 0.51

1,2-Dichloroethane BDL 0.020 0.03 1.0 9.120E-07 1.02

Methyl Ethyl Ketone (2-Butanone) BDL 0.040 0.06 2.1 1.824E-06 2.04

1,1,1-Trichloroethane BDL 0.010 0.01 0.5 4.560E-07 0.51

Carbon Tetrachloride BDL 0.020 0.03 1.0 9.120E-07 1.02

Benzene ADL 0.289 0.42 14.9 1.318E-05 14.74

1,1,2-Trichloroethane BDL 0.020 0.03 1.0 9.120E-07 1.02

1,2-Dichloropropane BDL 0.010 0.01 0.5 4.560E-07 0.51

Trichloroethylene BDL 0.010 0.01 0.5 4.560E-07 0.51

Dibromomethane BDL 0.010 0.01 0.5 4.560E-07 0.51

Bromodichloromethane BDL 0.010 0.01 0.5 4.560E-07 0.51

cis-1,3-Dichloropropene BDL 0.010 0.01 0.5 4.560E-07 0.51
trans-1,3-Dichloropropene BDL 0.007 0.01 0.4 3.192E-07 0.36

Dibromochloromethane BDL 0.009 0.01 0.5 4.104E-07 0.46

Methyl Isobutyl Ketone BDL 0.020 0.03 1.0 9.120E-07 1.02

Methyl Butyl Ketone (2-Hexanone) BDL 0.030 0.04 1.6 1.368E-06 1.53

Toluene ADL 0.160 0.23 8.3 7.296E-06 8.16

Ethylene Dibromide BDL 0.010 0.01 0.5 4.560E-07 0.51

Tetrachloroethylene BDL 0.020 0.03 1.0 9.120E-07 1.02

Chlorobenzene BDL 0.010 0.01 0.5 4.560E-07 0.51

1,1,1,2-Tetrachloroethane BDL 0.010 0.01 0.5 4.560E-07 0.51

Ethylbenzene BDL 0.010 0.01 0.5 4.560E-07 0.51

m / p-Xylene ADL 0.020 0.03 1.0 9.120E-07 1.02

Styrene BDL 0.010 0.01 0.5 4.560E-07 0.51

o-Xylene BDL 0.020 0.03 1.0 9.120E-07 1.02

Bromoform BDL 0.010 0.01 0.5 4.560E-07 0.51

1,1,2,2-Tetrachloroethane BDL 0.010 0.01 0.5 4.560E-07 0.51

1,2,3-Trichloropropane BDL 0.020 0.03 1.0 9.120E-07 1.02

1,3-Dichlorobenzene BDL 0.020 0.03 1.0 9.120E-07 1.02

1,4-Dichlorobenzene BDL 0.020 0.03 1.0 9.120E-07 1.02

1,2-Dichlorobenzene BDL 0.020 0.03 1.0 9.120E-07 1.02

Total VOC 5.90E-05

BDL = Below Detection Limit - All fractions below detection limit

DLL = Detection Limit Limited - Some fractions below detection limit

ADL = Above Detection Limit - All fractions above detection limit

EMSI
 EPA REFERENCE METHOD 0030

Volatile Organic Sampling Train (VOST)

Test 2 Summary

Client NRG Energy Inc. Date 2/24/2010

Facility Vienna Job Number 902637

Unit 8 Operator JW-BD

Location Stack

TEST 2 Summary Time:Start 13:05 End 15:20 Date 2/24/2010

Carbon Dioxide 10.90 % Oxygen 6.80 %

Sample Gas Volume 2.840 dscf F-Factor 9518

Heat Input NA mmBtu/hr

Detection ug/dscm

Element Status ug ug/dscf ug/dscm lbs/mmBtu @7%O2

Dichlorodifluoromethane (Freon 12) BDL 8.832E-07 0.99

Chloromethane DLL 3.386E-06 3.79

Vinyl chloride BDL 4.416E-07 0.49

Bromomethane ADL 4.906E-06 5.49

Chloroethane BDL 3.975E-07 0.44

Trichlorofluoromethane (Freon 11) BDL 4.416E-07 0.49

Acetone (2-Propanone) ADL 6.152E-06 6.88

1,1-Dichloroethylene BDL 4.416E-07 0.49

Iodomethane BDL 8.832E-07 0.99

Carbon disulfide BDL 1.325E-06 1.48

Methylene Chloride (Dichloromethane) ADL 5.954E-06 6.66

1,1-Dichloroethane BDL 4.416E-07 0.49

trans-1,2-Dichloroethylene BDL 4.416E-07 0.49

cis-1,2-Dichloroethylene BDL 4.416E-07 0.49

Chloroform BDL 4.416E-07 0.49

1,2-Dichloroethane BDL 3.091E-07 0.35

Methyl Ethyl Ketone (2-Butanone) BDL 1.766E-06 1.98

1,1,1-Trichloroethane BDL 4.416E-07 0.49

Carbon Tetrachloride BDL 8.832E-07 0.99

Benzene ADL 2.215E-05 24.77

1,1,2-Trichloroethane BDL 8.832E-07 0.99

1,2-Dichloropropane BDL 4.416E-07 0.49

Trichloroethylene BDL 4.416E-07 0.49

Dibromomethane BDL 4.416E-07 0.49

Bromodichloromethane BDL 4.416E-07 0.49

cis-1,3-Dichloropropene BDL 4.416E-07 0.49
trans-1,3-Dichloropropene BDL 3.091E-07 0.35

Dibromochloromethane BDL 3.975E-07 0.44

Methyl Isobutyl Ketone BDL 8.832E-07 0.99

Methyl Butyl Ketone (2-Hexanone) BDL 1.325E-06 1.48

Toluene ADL 9.124E-06 10.20

Ethylene Dibromide BDL 4.416E-07 0.49

Tetrachloroethylene BDL 8.832E-07 0.99

Chlorobenzene BDL 4.416E-07 0.49

1,1,1,2-Tetrachloroethane BDL 4.416E-07 0.49

Ethylbenzene BDL 4.416E-07 0.49

m / p-Xylene ADL 1.101E-06 1.23

Styrene BDL 4.416E-07 0.49

o-Xylene BDL 8.832E-07 0.99

Bromoform BDL 4.416E-07 0.49

1,1,2,2-Tetrachloroethane BDL 4.416E-07 0.49

1,2,3-Trichloropropane BDL 8.832E-07 0.99

1,3-Dichlorobenzene BDL 8.832E-07 0.99

1,4-Dichlorobenzene BDL 8.832E-07 0.99

1,2-Dichlorobenzene BDL 8.832E-07 0.99

Total VOC 7.72E-05

BDL = Below Detection Limit - All fractions below detection limit

DLL = Detection Limit Limited - Some fractions below detection limit

ADL = Above Detection Limit - All fractions above detection limit

EMSI
 EPA REFERENCE METHOD 0030

Volatile Organic Sampling Train (VOST)

Test 2 Run 1

Client NRG Energy Inc. Date 2/24/2010

Facility Vienna Job Number 902637

Unit 8 Operator JW-BD

Location Stack

TEST 2 Run 1 Time:Start 13:05 End 13:25 Date 2/24/2010

Carbon Dioxide 10.90 % Oxygen 6.90 %

Sample Gas Volume 0.732 dscf F-Factor 9518

Heat Input NA mmBtu/hr

Detection ug/dscm

Element Status ug ug/dscf ug/dscm lbs/mmBtu @7%O2

Dichlorodifluoromethane (Freon 12) BDL 0.020 0.0 1.0 8.562E-07 0.96

Chloromethane BDL 0.020 0.0 1.0 8.562E-07 0.96

Vinyl chloride BDL 0.010 0.0 0.5 4.281E-07 0.48

Bromomethane ADL 0.140 0.2 6.8 5.993E-06 6.70

Chloroethane BDL 0.009 0.0 0.4 3.853E-07 0.43

Trichlorofluoromethane (Freon 11) BDL 0.010 0.0 0.5 4.281E-07 0.48

Acetone (2-Propanone) ADL 0.220 0.3 10.6 9.418E-06 10.53

1,1-Dichloroethylene BDL 0.010 0.0 0.5 4.281E-07 0.48

Iodomethane BDL 0.020 0.0 1.0 8.562E-07 0.96

Carbon disulfide BDL 0.030 0.0 1.4 1.284E-06 1.44

Methylene Chloride (Dichloromethane) ADL 0.420 0.6 20.3 1.798E-05 20.11

1,1-Dichloroethane BDL 0.010 0.0 0.5 4.281E-07 0.48

trans-1,2-Dichloroethylene BDL 0.010 0.0 0.5 4.281E-07 0.48

cis-1,2-Dichloroethylene BDL 0.010 0.0 0.5 4.281E-07 0.48

Chloroform BDL 0.010 0.0 0.5 4.281E-07 0.48

1,2-Dichloroethane BDL 0.007 0.0 0.3 2.997E-07 0.34

Methyl Ethyl Ketone (2-Butanone) BDL 0.040 0.1 1.9 1.712E-06 1.91

1,1,1-Trichloroethane BDL 0.010 0.0 0.5 4.281E-07 0.48

Carbon Tetrachloride BDL 0.020 0.0 1.0 8.562E-07 0.96

Benzene ADL 0.689 0.9 33.2 2.950E-05 32.98

1,1,2-Trichloroethane BDL 0.020 0.0 1.0 8.562E-07 0.96

1,2-Dichloropropane BDL 0.010 0.0 0.5 4.281E-07 0.48

Trichloroethylene BDL 0.010 0.0 0.5 4.281E-07 0.48

Dibromomethane BDL 0.010 0.0 0.5 4.281E-07 0.48

Bromodichloromethane BDL 0.010 0.0 0.5 4.281E-07 0.48

cis-1,3-Dichloropropene BDL 0.010 0.0 0.5 4.281E-07 0.48
trans-1,3-Dichloropropene BDL 0.007 0.0 0.3 2.997E-07 0.34

Dibromochloromethane BDL 0.009 0.0 0.4 3.853E-07 0.43

Methyl Isobutyl Ketone BDL 0.020 0.0 1.0 8.562E-07 0.96

Methyl Butyl Ketone (2-Hexanone) BDL 0.030 0.0 1.4 1.284E-06 1.44

Toluene ADL 0.270 0.4 13.0 1.156E-05 12.92

Ethylene Dibromide BDL 0.010 0.0 0.5 4.281E-07 0.48

Tetrachloroethylene BDL 0.020 0.0 1.0 8.562E-07 0.96

Chlorobenzene BDL 0.010 0.0 0.5 4.281E-07 0.48

1,1,1,2-Tetrachloroethane BDL 0.010 0.0 0.5 4.281E-07 0.48

Ethylbenzene BDL 0.010 0.0 0.5 4.281E-07 0.48

m / p-Xylene ADL 0.030 0.0 1.4 1.284E-06 1.44

Styrene BDL 0.010 0.0 0.5 4.281E-07 0.48

o-Xylene BDL 0.020 0.0 1.0 8.562E-07 0.96

Bromoform BDL 0.010 0.0 0.5 4.281E-07 0.48

1,1,2,2-Tetrachloroethane BDL 0.010 0.0 0.5 4.281E-07 0.48

1,2,3-Trichloropropane BDL 0.020 0.0 1.0 8.562E-07 0.96

1,3-Dichlorobenzene BDL 0.020 0.0 1.0 8.562E-07 0.96

1,4-Dichlorobenzene BDL 0.020 0.0 1.0 8.562E-07 0.96

1,2-Dichlorobenzene BDL 0.020 0.0 1.0 8.562E-07 0.96

Total VOC 9.76E-05

BDL = Below Detection Limit - All fractions below detection limit

DLL = Detection Limit Limited - Some fractions below detection limit

ADL = Above Detection Limit - All fractions above detection limit

EMSI
 EPA REFERENCE METHOD 0030

Volatile Organic Sampling Train (VOST)

Test 2 Run 2

Client NRG Energy Inc. Date 2/24/2010

Facility Vienna Job Number 902637

Unit 8 Operator JW-BD

Location Stack

TEST 2 Run 2 Time:Start 13:48 End 14:08 Date 2/24/2010

Carbon Dioxide 10.90 % Oxygen 6.90 %

Sample Gas Volume 0.682 dscf F-Factor 9518

Heat Input NA mmBtu/hr

Detection ug/dscm

Element Status ug ug/dscf ug/dscm lbs/mmBtu @7%O2

Dichlorodifluoromethane (Freon 12) BDL 0.020 0.0 1.0 9.186E-07 1.03

Chloromethane BDL 0.020 0.0 1.0 9.186E-07 1.03

Vinyl chloride BDL 0.010 0.0 0.5 4.593E-07 0.51

Bromomethane ADL 0.220 0.3 11.4 1.011E-05 11.30

Chloroethane BDL 0.009 0.0 0.5 4.134E-07 0.46

Trichlorofluoromethane (Freon 11) BDL 0.010 0.0 0.5 4.593E-07 0.51

Acetone (2-Propanone) ADL 0.120 0.2 6.2 5.512E-06 6.16

1,1-Dichloroethylene BDL 0.010 0.0 0.5 4.593E-07 0.51

Iodomethane BDL 0.020 0.0 1.0 9.186E-07 1.03

Carbon disulfide BDL 0.030 0.0 1.6 1.378E-06 1.54

Methylene Chloride (Dichloromethane) ADL 0.060 0.1 3.1 2.756E-06 3.08

1,1-Dichloroethane BDL 0.010 0.0 0.5 4.593E-07 0.51

trans-1,2-Dichloroethylene BDL 0.010 0.0 0.5 4.593E-07 0.51

cis-1,2-Dichloroethylene BDL 0.010 0.0 0.5 4.593E-07 0.51

Chloroform BDL 0.010 0.0 0.5 4.593E-07 0.51

1,2-Dichloroethane BDL 0.007 0.0 0.4 3.215E-07 0.36

Methyl Ethyl Ketone (2-Butanone) BDL 0.040 0.1 2.1 1.837E-06 2.05

1,1,1-Trichloroethane BDL 0.010 0.0 0.5 4.593E-07 0.51

Carbon Tetrachloride BDL 0.020 0.0 1.0 9.186E-07 1.03

Benzene ADL 0.562 0.8 29.1 2.581E-05 28.87

1,1,2-Trichloroethane BDL 0.020 0.0 1.0 9.186E-07 1.03

1,2-Dichloropropane BDL 0.010 0.0 0.5 4.593E-07 0.51

Trichloroethylene BDL 0.010 0.0 0.5 4.593E-07 0.51

Dibromomethane BDL 0.010 0.0 0.5 4.593E-07 0.51

Bromodichloromethane BDL 0.010 0.0 0.5 4.593E-07 0.51

cis-1,3-Dichloropropene BDL 0.010 0.0 0.5 4.593E-07 0.51
trans-1,3-Dichloropropene BDL 0.007 0.0 0.4 3.215E-07 0.36

Dibromochloromethane BDL 0.009 0.0 0.5 4.134E-07 0.46

Methyl Isobutyl Ketone BDL 0.020 0.0 1.0 9.186E-07 1.03

Methyl Butyl Ketone (2-Hexanone) BDL 0.030 0.0 1.6 1.378E-06 1.54

Toluene ADL 0.170 0.2 8.8 7.808E-06 8.73

Ethylene Dibromide BDL 0.010 0.0 0.5 4.593E-07 0.51

Tetrachloroethylene BDL 0.020 0.0 1.0 9.186E-07 1.03

Chlorobenzene BDL 0.010 0.0 0.5 4.593E-07 0.51

1,1,1,2-Tetrachloroethane BDL 0.010 0.0 0.5 4.593E-07 0.51

Ethylbenzene BDL 0.010 0.0 0.5 4.593E-07 0.51

m / p-Xylene ADL 0.020 0.0 1.0 9.186E-07 1.03

Styrene BDL 0.010 0.0 0.5 4.593E-07 0.51

o-Xylene BDL 0.020 0.0 1.0 9.186E-07 1.03

Bromoform BDL 0.010 0.0 0.5 4.593E-07 0.51

1,1,2,2-Tetrachloroethane BDL 0.010 0.0 0.5 4.593E-07 0.51

1,2,3-Trichloropropane BDL 0.020 0.0 1.0 9.186E-07 1.03

1,3-Dichlorobenzene BDL 0.020 0.0 1.0 9.186E-07 1.03

1,4-Dichlorobenzene BDL 0.020 0.0 1.0 9.186E-07 1.03

1,2-Dichlorobenzene BDL 0.020 0.0 1.0 9.186E-07 1.03

Total VOC 7.64E-05

BDL = Below Detection Limit - All fractions below detection limit

DLL = Detection Limit Limited - Some fractions below detection limit

ADL = Above Detection Limit - All fractions above detection limit

EMSI
 EPA REFERENCE METHOD 0030

Volatile Organic Sampling Train (VOST)

Test 2 Run 3

Client NRG Energy Inc. Date 2/24/2010

Facility Vienna Job Number 902637

Unit 8 Operator JW-BD

Location Stack

TEST 2 Run 3 Time:Start 14:25 End 14:45 Date 2/24/2010

Carbon Dioxide 10.90 % Oxygen 6.90 %

Sample Gas Volume 0.706 dscf F-Factor 9518

Heat Input NA mmBtu/hr

Detection ug/dscm

Element Status ug ug/dscf ug/dscm lbs/mmBtu @7%O2

Dichlorodifluoromethane (Freon 12) BDL 0.020 0.0 1.0 8.877E-07 0.99

Chloromethane BDL 0.020 0.0 1.0 8.877E-07 0.99

Vinyl chloride BDL 0.010 0.0 0.5 4.439E-07 0.50

Bromomethane ADL 0.050 0.1 2.5 2.219E-06 2.48

Chloroethane BDL 0.009 0.0 0.4 3.995E-07 0.45

Trichlorofluoromethane (Freon 11) BDL 0.010 0.0 0.5 4.439E-07 0.50

Acetone (2-Propanone) ADL 0.120 0.2 6.0 5.326E-06 5.96

1,1-Dichloroethylene BDL 0.010 0.0 0.5 4.439E-07 0.50

Iodomethane BDL 0.020 0.0 1.0 8.877E-07 0.99

Carbon disulfide BDL 0.030 0.0 1.5 1.332E-06 1.49

Methylene Chloride (Dichloromethane) ADL 0.040 0.1 2.0 1.775E-06 1.99

1,1-Dichloroethane BDL 0.010 0.0 0.5 4.439E-07 0.50

trans-1,2-Dichloroethylene BDL 0.010 0.0 0.5 4.439E-07 0.50

cis-1,2-Dichloroethylene BDL 0.010 0.0 0.5 4.439E-07 0.50

Chloroform BDL 0.010 0.0 0.5 4.439E-07 0.50

1,2-Dichloroethane BDL 0.007 0.0 0.3 3.107E-07 0.35

Methyl Ethyl Ketone (2-Butanone) BDL 0.040 0.1 2.0 1.775E-06 1.99

1,1,1-Trichloroethane BDL 0.010 0.0 0.5 4.439E-07 0.50

Carbon Tetrachloride BDL 0.020 0.0 1.0 8.877E-07 0.99

Benzene ADL 0.417 0.6 20.8 1.851E-05 20.70

1,1,2-Trichloroethane BDL 0.020 0.0 1.0 8.877E-07 0.99

1,2-Dichloropropane BDL 0.010 0.0 0.5 4.439E-07 0.50

Trichloroethylene BDL 0.010 0.0 0.5 4.439E-07 0.50

Dibromomethane BDL 0.010 0.0 0.5 4.439E-07 0.50

Bromodichloromethane BDL 0.010 0.0 0.5 4.439E-07 0.50

cis-1,3-Dichloropropene BDL 0.010 0.0 0.5 4.439E-07 0.50
trans-1,3-Dichloropropene BDL 0.007 0.0 0.3 3.107E-07 0.35

Dibromochloromethane BDL 0.009 0.0 0.4 3.995E-07 0.45

Methyl Isobutyl Ketone BDL 0.020 0.0 1.0 8.877E-07 0.99

Methyl Butyl Ketone (2-Hexanone) BDL 0.030 0.0 1.5 1.332E-06 1.49

Toluene ADL 0.180 0.3 9.0 7.989E-06 8.93

Ethylene Dibromide BDL 0.010 0.0 0.5 4.439E-07 0.50

Tetrachloroethylene BDL 0.020 0.0 1.0 8.877E-07 0.99

Chlorobenzene BDL 0.010 0.0 0.5 4.439E-07 0.50

1,1,1,2-Tetrachloroethane BDL 0.010 0.0 0.5 4.439E-07 0.50

Ethylbenzene BDL 0.010 0.0 0.5 4.439E-07 0.50

m / p-Xylene ADL 0.030 0.0 1.5 1.332E-06 1.49

Styrene BDL 0.010 0.0 0.5 4.439E-07 0.50

o-Xylene BDL 0.020 0.0 1.0 8.877E-07 0.99

Bromoform BDL 0.010 0.0 0.5 4.439E-07 0.50

1,1,2,2-Tetrachloroethane BDL 0.010 0.0 0.5 4.439E-07 0.50

1,2,3-Trichloropropane BDL 0.020 0.0 1.0 8.877E-07 0.99

1,3-Dichlorobenzene BDL 0.020 0.0 1.0 8.877E-07 0.99

1,4-Dichlorobenzene BDL 0.020 0.0 1.0 8.877E-07 0.99

1,2-Dichlorobenzene BDL 0.020 0.0 1.0 8.877E-07 0.99

Total VOC 5.99E-05

BDL = Below Detection Limit - All fractions below detection limit

DLL = Detection Limit Limited - Some fractions below detection limit

ADL = Above Detection Limit - All fractions above detection limit

EMSI
 EPA REFERENCE METHOD 0030

Volatile Organic Sampling Train (VOST)

Test 2 Run 4

Client NRG Energy Inc. Date 2/24/2010

Facility Vienna Job Number 902637

Unit 8 Operator JW-BD

Location Stack

TEST 2 Run 4 Time:Start 15:00 End 15:20 Date 2/24/2010

Carbon Dioxide 10.90 % Oxygen 6.90 %

Sample Gas Volume 0.720 dscf F-Factor 9518

Heat Input NA mmBtu/hr

Detection ug/dscm

Element Status ug ug/dscf ug/dscm lbs/mmBtu @7%O2

Dichlorodifluoromethane (Freon 12) BDL 0.020 0.0 1.0 8.705E-07 0.97

Chloromethane ADL 0.250 0.3 12.3 1.088E-05 12.17

Vinyl chloride BDL 0.010 0.0 0.5 4.352E-07 0.49

Bromomethane ADL 0.030 0.0 1.5 1.306E-06 1.46

Chloroethane BDL 0.009 0.0 0.4 3.917E-07 0.44

Trichlorofluoromethane (Freon 11) BDL 0.010 0.0 0.5 4.352E-07 0.49

Acetone (2-Propanone) ADL 0.100 0.1 4.9 4.352E-06 4.87

1,1-Dichloroethylene BDL 0.010 0.0 0.5 4.352E-07 0.49

Iodomethane BDL 0.020 0.0 1.0 8.705E-07 0.97

Carbon disulfide BDL 0.030 0.0 1.5 1.306E-06 1.46

Methylene Chloride (Dichloromethane) ADL 0.030 0.0 1.5 1.306E-06 1.46

1,1-Dichloroethane BDL 0.010 0.0 0.5 4.352E-07 0.49

trans-1,2-Dichloroethylene BDL 0.010 0.0 0.5 4.352E-07 0.49

cis-1,2-Dichloroethylene BDL 0.010 0.0 0.5 4.352E-07 0.49

Chloroform BDL 0.010 0.0 0.5 4.352E-07 0.49

1,2-Dichloroethane BDL 0.007 0.0 0.3 3.047E-07 0.34

Methyl Ethyl Ketone (2-Butanone) BDL 0.040 0.1 2.0 1.741E-06 1.95

1,1,1-Trichloroethane BDL 0.010 0.0 0.5 4.352E-07 0.49

Carbon Tetrachloride BDL 0.020 0.0 1.0 8.705E-07 0.97

Benzene ADL 0.340 0.5 16.7 1.480E-05 16.55

1,1,2-Trichloroethane BDL 0.020 0.0 1.0 8.705E-07 0.97

1,2-Dichloropropane BDL 0.010 0.0 0.5 4.352E-07 0.49

Trichloroethylene BDL 0.010 0.0 0.5 4.352E-07 0.49

Dibromomethane BDL 0.010 0.0 0.5 4.352E-07 0.49

Bromodichloromethane BDL 0.010 0.0 0.5 4.352E-07 0.49

cis-1,3-Dichloropropene BDL 0.010 0.0 0.5 4.352E-07 0.49
trans-1,3-Dichloropropene BDL 0.007 0.0 0.3 3.047E-07 0.34

Dibromochloromethane BDL 0.009 0.0 0.4 3.917E-07 0.44

Methyl Isobutyl Ketone BDL 0.020 0.0 1.0 8.705E-07 0.97

Methyl Butyl Ketone (2-Hexanone) BDL 0.030 0.0 1.5 1.306E-06 1.46

Toluene ADL 0.210 0.3 10.3 9.140E-06 10.22

Ethylene Dibromide BDL 0.010 0.0 0.5 4.352E-07 0.49

Tetrachloroethylene BDL 0.020 0.0 1.0 8.705E-07 0.97

Chlorobenzene BDL 0.010 0.0 0.5 4.352E-07 0.49

1,1,1,2-Tetrachloroethane BDL 0.010 0.0 0.5 4.352E-07 0.49

Ethylbenzene BDL 0.010 0.0 0.5 4.352E-07 0.49

m / p-Xylene ADL 0.020 0.0 1.0 8.705E-07 0.97

Styrene BDL 0.010 0.0 0.5 4.352E-07 0.49

o-Xylene BDL 0.020 0.0 1.0 8.705E-07 0.97

Bromoform BDL 0.010 0.0 0.5 4.352E-07 0.49

1,1,2,2-Tetrachloroethane BDL 0.010 0.0 0.5 4.352E-07 0.49

1,2,3-Trichloropropane BDL 0.020 0.0 1.0 8.705E-07 0.97

1,3-Dichlorobenzene BDL 0.020 0.0 1.0 8.705E-07 0.97

1,4-Dichlorobenzene BDL 0.020 0.0 1.0 8.705E-07 0.97

1,2-Dichlorobenzene BDL 0.020 0.0 1.0 8.705E-07 0.97

Total VOC 6.41E-05

BDL = Below Detection Limit - All fractions below detection limit

DLL = Detection Limit Limited - Some fractions below detection limit

ADL = Above Detection Limit - All fractions above detection limit

EMSI
 EPA REFERENCE METHOD 0030

Volatile Organic Sampling Train (VOST)

Test 3 Summary

Client NRG Energy Inc. Date 2/24/2010

Facility Vienna Job Number 902637

Unit 8 Operator JW-BD

Location Stack

TEST 3 Summary Time:Start 16:40 End 18:42 Date 2/24/2010

Carbon Dioxide 10.90 % Oxygen 6.80 %

Sample Gas Volume 2.751 dscf F-Factor 9518

Heat Input NA mmBtu/hr

Detection ug/dscm

Element Status ug ug/dscf ug/dscm mmBtu/hr @7%O2

Dichlorodifluoromethane (Freon 12) BDL 9.130E-07 1.02

Chloromethane BDL 9.130E-07 1.02

Vinyl chloride BDL 4.565E-07 0.51

Bromomethane ADL 3.990E-06 4.46

Chloroethane BDL 4.109E-07 0.46

Trichlorofluoromethane (Freon 11) BDL 4.565E-07 0.51

Acetone (2-Propanone) ADL 7.165E-06 8.01

1,1-Dichloroethylene BDL 4.565E-07 0.51

Iodomethane BDL 9.130E-07 1.02

Carbon disulfide BDL 1.370E-06 1.53

Methylene Chloride (Dichloromethane) ADL 1.245E-05 13.93

1,1-Dichloroethane BDL 4.565E-07 0.51

trans-1,2-Dichloroethylene BDL 4.565E-07 0.51

cis-1,2-Dichloroethylene BDL 4.565E-07 0.51

Chloroform BDL 4.565E-07 0.51

1,2-Dichloroethane BDL 3.196E-07 0.36

Methyl Ethyl Ketone (2-Butanone) BDL 1.826E-06 2.04

1,1,1-Trichloroethane BDL 4.565E-07 0.51

Carbon Tetrachloride BDL 9.130E-07 1.02

Benzene ADL 2.073E-05 23.18

1,1,2-Trichloroethane BDL 9.130E-07 1.02

1,2-Dichloropropane BDL 4.565E-07 0.51

Trichloroethylene BDL 4.565E-07 0.51

Dibromomethane BDL 4.565E-07 0.51

Bromodichloromethane BDL 4.565E-07 0.51

cis-1,3-Dichloropropene BDL 4.565E-07 0.51
trans-1,3-Dichloropropene BDL 3.196E-07 0.36

Dibromochloromethane BDL 4.109E-07 0.46

Methyl Isobutyl Ketone BDL 9.130E-07 1.02

Methyl Butyl Ketone (2-Hexanone) BDL 1.370E-06 1.53

Toluene ADL 7.828E-06 8.75

Ethylene Dibromide BDL 4.565E-07 0.51

Tetrachloroethylene BDL 9.130E-07 1.02

Chlorobenzene BDL 4.565E-07 0.51

1,1,1,2-Tetrachloroethane BDL 4.565E-07 0.51

Ethylbenzene BDL 4.565E-07 0.51

m / p-Xylene DLL 1.277E-06 1.43

Styrene BDL 4.565E-07 0.51

o-Xylene BDL 9.130E-07 1.02

Bromoform BDL 4.565E-07 0.51

1,1,2,2-Tetrachloroethane BDL 4.565E-07 0.51

1,2,3-Trichloropropane BDL 9.130E-07 1.02

1,3-Dichlorobenzene BDL 9.130E-07 1.02

1,4-Dichlorobenzene BDL 9.130E-07 1.02

1,2-Dichlorobenzene BDL 9.130E-07 1.02

Total VOC 7.96E-05

BDL = Below Detection Limit - All fractions below detection limit

DLL = Detection Limit Limited - Some fractions below detection limit

ADL = Above Detection Limit - All fractions above detection limit

EMSI
 EPA REFERENCE METHOD 0030

Volatile Organic Sampling Train (VOST)

Test 3 Run 1

Client NRG Energy Inc. Date 2/24/2010

Facility Vienna Job Number 902637

Unit 8 Operator JW-BD

Location Stack

TEST 3 Run 1 Time:Start 16:40 End 17:00 Date 2/24/2010

Carbon Dioxide 11.00 % Oxygen 6.90 %

Sample Gas Volume 0.711 dscf F-Factor 9518

Heat Input NA mmBtu/hr

Detection ug/dscm

Element Status ug ug/dscf ug/dscm lbs/mmBtu @7%O2

Dichlorodifluoromethane (Freon 12) BDL 0.020 0.0 1.0 8.816E-07 0.99

Chloromethane BDL 0.020 0.0 1.0 8.816E-07 0.99

Vinyl chloride BDL 0.010 0.0 0.5 4.408E-07 0.49

Bromomethane ADL 0.080 0.1 4.0 3.526E-06 3.94

Chloroethane BDL 0.009 0.0 0.4 3.967E-07 0.44

Trichlorofluoromethane (Freon 11) BDL 0.010 0.0 0.5 4.408E-07 0.49

Acetone (2-Propanone) ADL 0.220 0.3 10.9 9.697E-06 10.84

1,1-Dichloroethylene BDL 0.010 0.0 0.5 4.408E-07 0.49

Iodomethane BDL 0.020 0.0 1.0 8.816E-07 0.99

Carbon disulfide BDL 0.030 0.0 1.5 1.322E-06 1.48

Methylene Chloride (Dichloromethane) ADL 0.980 1.4 48.7 4.320E-05 48.30

1,1-Dichloroethane BDL 0.010 0.0 0.5 4.408E-07 0.49

trans-1,2-Dichloroethylene BDL 0.010 0.0 0.5 4.408E-07 0.49

cis-1,2-Dichloroethylene BDL 0.010 0.0 0.5 4.408E-07 0.49

Chloroform BDL 0.010 0.0 0.5 4.408E-07 0.49

1,2-Dichloroethane BDL 0.007 0.0 0.3 3.085E-07 0.35

Methyl Ethyl Ketone (2-Butanone) BDL 0.040 0.1 2.0 1.763E-06 1.97

1,1,1-Trichloroethane BDL 0.010 0.0 0.5 4.408E-07 0.49

Carbon Tetrachloride BDL 0.020 0.0 1.0 8.816E-07 0.99

Benzene ADL 0.261 0.4 13.0 1.150E-05 12.86

1,1,2-Trichloroethane BDL 0.020 0.0 1.0 8.816E-07 0.99

1,2-Dichloropropane BDL 0.010 0.0 0.5 4.408E-07 0.49

Trichloroethylene BDL 0.010 0.0 0.5 4.408E-07 0.49

Dibromomethane BDL 0.010 0.0 0.5 4.408E-07 0.49

Bromodichloromethane BDL 0.010 0.0 0.5 4.408E-07 0.49

cis-1,3-Dichloropropene BDL 0.010 0.0 0.5 4.408E-07 0.49
trans-1,3-Dichloropropene BDL 0.007 0.0 0.3 3.085E-07 0.35

Dibromochloromethane BDL 0.009 0.0 0.4 3.967E-07 0.44

Methyl Isobutyl Ketone BDL 0.020 0.0 1.0 8.816E-07 0.99

Methyl Butyl Ketone (2-Hexanone) BDL 0.030 0.0 1.5 1.322E-06 1.48

Toluene ADL 0.210 0.3 10.4 9.256E-06 10.35

Ethylene Dibromide BDL 0.010 0.0 0.5 4.408E-07 0.49

Tetrachloroethylene BDL 0.020 0.0 1.0 8.816E-07 0.99

Chlorobenzene BDL 0.010 0.0 0.5 4.408E-07 0.49

1,1,1,2-Tetrachloroethane BDL 0.010 0.0 0.5 4.408E-07 0.49

Ethylbenzene BDL 0.010 0.0 0.5 4.408E-07 0.49

m / p-Xylene BDL 0.020 0.0 1.0 8.816E-07 0.99

Styrene BDL 0.010 0.0 0.5 4.408E-07 0.49

o-Xylene BDL 0.020 0.0 1.0 8.816E-07 0.99

Bromoform BDL 0.010 0.0 0.5 4.408E-07 0.49

1,1,2,2-Tetrachloroethane BDL 0.010 0.0 0.5 4.408E-07 0.49

1,2,3-Trichloropropane BDL 0.020 0.0 1.0 8.816E-07 0.99

1,3-Dichlorobenzene BDL 0.020 0.0 1.0 8.816E-07 0.99

1,4-Dichlorobenzene BDL 0.020 0.0 1.0 8.816E-07 0.99

1,2-Dichlorobenzene BDL 0.020 0.0 1.0 8.816E-07 0.99

Total VOC 1.01E-04

BDL = Below Detection Limit - All fractions below detection limit

DLL = Detection Limit Limited - Some fractions below detection limit

ADL = Above Detection Limit - All fractions above detection limit

EMSI
 EPA REFERENCE METHOD 0030

Volatile Organic Sampling Train (VOST)

Test 3 Run 2

Client NRG Energy Inc. Date 2/24/2010

Facility Vienna Job Number 902637

Unit 8 Operator JW-BD

Location Stack

TEST 3 Run 2 Time:Start 17:18 End 17:38 Date 2/24/2010

Carbon Dioxide 11.00 % Oxygen 6.90 %

Sample Gas Volume 0.670 dscf F-Factor 9518

Heat Input NA mmBtu/hr

Detection ug/dscm

Element Status ug ug/dscf ug/dscm lbs/mmBtu @7%O2

Dichlorodifluoromethane (Freon 12) BDL 0.020 0.0 1.1 9.347E-07 1.05

Chloromethane BDL 0.020 0.0 1.1 9.347E-07 1.05

Vinyl chloride BDL 0.010 0.0 0.5 4.674E-07 0.52

Bromomethane ADL 0.080 0.1 4.2 3.739E-06 4.18

Chloroethane BDL 0.009 0.0 0.5 4.206E-07 0.47

Trichlorofluoromethane (Freon 11) BDL 0.010 0.0 0.5 4.674E-07 0.52

Acetone (2-Propanone) ADL 0.140 0.2 7.4 6.543E-06 7.32

1,1-Dichloroethylene BDL 0.010 0.0 0.5 4.674E-07 0.52

Iodomethane BDL 0.020 0.0 1.1 9.347E-07 1.05

Carbon disulfide BDL 0.030 0.0 1.6 1.402E-06 1.57

Methylene Chloride (Dichloromethane) ADL 0.040 0.1 2.1 1.869E-06 2.09

1,1-Dichloroethane BDL 0.010 0.0 0.5 4.674E-07 0.52

trans-1,2-Dichloroethylene BDL 0.010 0.0 0.5 4.674E-07 0.52

cis-1,2-Dichloroethylene BDL 0.010 0.0 0.5 4.674E-07 0.52

Chloroform BDL 0.010 0.0 0.5 4.674E-07 0.52

1,2-Dichloroethane BDL 0.007 0.0 0.4 3.272E-07 0.37

Methyl Ethyl Ketone (2-Butanone) BDL 0.040 0.1 2.1 1.869E-06 2.09

1,1,1-Trichloroethane BDL 0.010 0.0 0.5 4.674E-07 0.52

Carbon Tetrachloride BDL 0.020 0.0 1.1 9.347E-07 1.05

Benzene ADL 0.293 0.4 15.4 1.369E-05 15.31

1,1,2-Trichloroethane BDL 0.020 0.0 1.1 9.347E-07 1.05

1,2-Dichloropropane BDL 0.010 0.0 0.5 4.674E-07 0.52

Trichloroethylene BDL 0.010 0.0 0.5 4.674E-07 0.52

Dibromomethane BDL 0.010 0.0 0.5 4.674E-07 0.52

Bromodichloromethane BDL 0.010 0.0 0.5 4.674E-07 0.52

cis-1,3-Dichloropropene BDL 0.010 0.0 0.5 4.674E-07 0.52
trans-1,3-Dichloropropene BDL 0.007 0.0 0.4 3.272E-07 0.37

Dibromochloromethane BDL 0.009 0.0 0.5 4.206E-07 0.47

Methyl Isobutyl Ketone BDL 0.020 0.0 1.1 9.347E-07 1.05

Methyl Butyl Ketone (2-Hexanone) BDL 0.030 0.0 1.6 1.402E-06 1.57

Toluene ADL 0.130 0.2 6.8 6.076E-06 6.79

Ethylene Dibromide BDL 0.010 0.0 0.5 4.674E-07 0.52

Tetrachloroethylene BDL 0.020 0.0 1.1 9.347E-07 1.05

Chlorobenzene BDL 0.010 0.0 0.5 4.674E-07 0.52

1,1,1,2-Tetrachloroethane BDL 0.010 0.0 0.5 4.674E-07 0.52

Ethylbenzene BDL 0.010 0.0 0.5 4.674E-07 0.52

m / p-Xylene BDL 0.020 0.0 1.1 9.347E-07 1.05

Styrene BDL 0.010 0.0 0.5 4.674E-07 0.52

o-Xylene BDL 0.020 0.0 1.1 9.347E-07 1.05

Bromoform BDL 0.010 0.0 0.5 4.674E-07 0.52

1,1,2,2-Tetrachloroethane BDL 0.010 0.0 0.5 4.674E-07 0.52

1,2,3-Trichloropropane BDL 0.020 0.0 1.1 9.347E-07 1.05

1,3-Dichlorobenzene BDL 0.020 0.0 1.1 9.347E-07 1.05

1,4-Dichlorobenzene BDL 0.020 0.0 1.1 9.347E-07 1.05

1,2-Dichlorobenzene BDL 0.020 0.0 1.1 9.347E-07 1.05

Total VOC 5.68E-05

BDL = Below Detection Limit - All fractions below detection limit

DLL = Detection Limit Limited - Some fractions below detection limit

ADL = Above Detection Limit - All fractions above detection limit

EMSI
 EPA REFERENCE METHOD 0030

Volatile Organic Sampling Train (VOST)

Test 3 Run 3

Client NRG Energy Inc. Date 2/24/2010

Facility Vienna Job Number 902637

Unit 8 Operator JW-BD

Location Stack

TEST 3 Run 3 Time:Start 17:47 End 18:07 Date 2/24/2010

Carbon Dioxide 11.00 % Oxygen 6.90 %

Sample Gas Volume 0.725 dscf F-Factor 9518

Heat Input NA mmBtu/hr

Detection ug/dscm

Element Status ug ug/dscf ug/dscm lbs/mmBtu @7%O2

Dichlorodifluoromethane (Freon 12) BDL 0.020 0.0 1.0 8.643E-07 0.97

Chloromethane BDL 0.020 0.0 1.0 8.643E-07 0.97

Vinyl chloride BDL 0.010 0.0 0.5 4.322E-07 0.48

Bromomethane ADL 0.100 0.1 4.9 4.322E-06 4.83

Chloroethane BDL 0.009 0.0 0.4 3.890E-07 0.43

Trichlorofluoromethane (Freon 11) BDL 0.010 0.0 0.5 4.322E-07 0.48

Acetone (2-Propanone) ADL 0.130 0.2 6.3 5.618E-06 6.28

1,1-Dichloroethylene BDL 0.010 0.0 0.5 4.322E-07 0.48

Iodomethane BDL 0.020 0.0 1.0 8.643E-07 0.97

Carbon disulfide BDL 0.030 0.0 1.5 1.297E-06 1.45

Methylene Chloride (Dichloromethane) ADL 0.020 0.0 1.0 8.643E-07 0.97

1,1-Dichloroethane BDL 0.010 0.0 0.5 4.322E-07 0.48

trans-1,2-Dichloroethylene BDL 0.010 0.0 0.5 4.322E-07 0.48

cis-1,2-Dichloroethylene BDL 0.010 0.0 0.5 4.322E-07 0.48

Chloroform BDL 0.010 0.0 0.5 4.322E-07 0.48

1,2-Dichloroethane BDL 0.007 0.0 0.3 3.025E-07 0.34

Methyl Ethyl Ketone (2-Butanone) BDL 0.040 0.1 1.9 1.729E-06 1.93

1,1,1-Trichloroethane BDL 0.010 0.0 0.5 4.322E-07 0.48

Carbon Tetrachloride BDL 0.020 0.0 1.0 8.643E-07 0.97

Benzene ADL 0.496 0.7 24.1 2.144E-05 23.97

1,1,2-Trichloroethane BDL 0.020 0.0 1.0 8.643E-07 0.97

1,2-Dichloropropane BDL 0.010 0.0 0.5 4.322E-07 0.48

Trichloroethylene BDL 0.010 0.0 0.5 4.322E-07 0.48

Dibromomethane BDL 0.010 0.0 0.5 4.322E-07 0.48

Bromodichloromethane BDL 0.010 0.0 0.5 4.322E-07 0.48

cis-1,3-Dichloropropene BDL 0.010 0.0 0.5 4.322E-07 0.48
trans-1,3-Dichloropropene BDL 0.007 0.0 0.3 3.025E-07 0.34

Dibromochloromethane BDL 0.009 0.0 0.4 3.890E-07 0.43

Methyl Isobutyl Ketone BDL 0.020 0.0 1.0 8.643E-07 0.97

Methyl Butyl Ketone (2-Hexanone) BDL 0.030 0.0 1.5 1.297E-06 1.45

Toluene ADL 0.100 0.1 4.9 4.322E-06 4.83

Ethylene Dibromide BDL 0.010 0.0 0.5 4.322E-07 0.48

Tetrachloroethylene BDL 0.020 0.0 1.0 8.643E-07 0.97

Chlorobenzene BDL 0.010 0.0 0.5 4.322E-07 0.48

1,1,1,2-Tetrachloroethane BDL 0.010 0.0 0.5 4.322E-07 0.48

Ethylbenzene BDL 0.010 0.0 0.5 4.322E-07 0.48

m / p-Xylene BDL 0.020 0.0 1.0 8.643E-07 0.97

Styrene BDL 0.010 0.0 0.5 4.322E-07 0.48

o-Xylene BDL 0.020 0.0 1.0 8.643E-07 0.97

Bromoform BDL 0.010 0.0 0.5 4.322E-07 0.48

1,1,2,2-Tetrachloroethane BDL 0.010 0.0 0.5 4.322E-07 0.48

1,2,3-Trichloropropane BDL 0.020 0.0 1.0 8.643E-07 0.97

1,3-Dichlorobenzene BDL 0.020 0.0 1.0 8.643E-07 0.97

1,4-Dichlorobenzene BDL 0.020 0.0 1.0 8.643E-07 0.97

1,2-Dichlorobenzene BDL 0.020 0.0 1.0 8.643E-07 0.97

Total VOC 5.96E-05

BDL = Below Detection Limit - All fractions below detection limit

DLL = Detection Limit Limited - Some fractions below detection limit

ADL = Above Detection Limit - All fractions above detection limit

EMSI
 EPA REFERENCE METHOD 0030

Volatile Organic Sampling Train (VOST)

Test 3 Run 4

Client NRG Energy Inc. Date 2/24/2010

Facility Vienna Job Number 902637

Unit 8 Operator JW-BD

Location Stack

TEST 3 Run 4 Time:Start 18:22 End 18:42 Date 2/24/2010

Carbon Dioxide 11.00 % Oxygen 6.90 %

Sample Gas Volume 0.645 dscf F-Factor 9518

Heat Input NA mmBtu/hr

Detection ug/dscm

Element Status ug ug/dscf ug/dscm lbs/mmBtu @7%O2

Dichlorodifluoromethane (Freon 12) BDL 0.020 0.0 1.1 9.714E-07 1.09

Chloromethane BDL 0.020 0.0 1.1 9.714E-07 1.09

Vinyl chloride BDL 0.010 0.0 0.5 4.857E-07 0.54

Bromomethane ADL 0.090 0.1 4.9 4.371E-06 4.89

Chloroethane BDL 0.009 0.0 0.5 4.371E-07 0.49

Trichlorofluoromethane (Freon 11) BDL 0.010 0.0 0.5 4.857E-07 0.54

Acetone (2-Propanone) ADL 0.140 0.2 7.7 6.800E-06 7.60

1,1-Dichloroethylene BDL 0.010 0.0 0.5 4.857E-07 0.54

Iodomethane BDL 0.020 0.0 1.1 9.714E-07 1.09

Carbon disulfide BDL 0.030 0.0 1.6 1.457E-06 1.63

Methylene Chloride (Dichloromethane) ADL 0.080 0.1 4.4 3.885E-06 4.34

1,1-Dichloroethane BDL 0.010 0.0 0.5 4.857E-07 0.54

trans-1,2-Dichloroethylene BDL 0.010 0.0 0.5 4.857E-07 0.54

cis-1,2-Dichloroethylene BDL 0.010 0.0 0.5 4.857E-07 0.54

Chloroform BDL 0.010 0.0 0.5 4.857E-07 0.54

1,2-Dichloroethane BDL 0.007 0.0 0.4 3.400E-07 0.38

Methyl Ethyl Ketone (2-Butanone) BDL 0.040 0.1 2.2 1.943E-06 2.17

1,1,1-Trichloroethane BDL 0.010 0.0 0.5 4.857E-07 0.54

Carbon Tetrachloride BDL 0.020 0.0 1.1 9.714E-07 1.09

Benzene ADL 0.747 1.2 40.9 3.628E-05 40.57

1,1,2-Trichloroethane BDL 0.020 0.0 1.1 9.714E-07 1.09

1,2-Dichloropropane BDL 0.010 0.0 0.5 4.857E-07 0.54

Trichloroethylene BDL 0.010 0.0 0.5 4.857E-07 0.54

Dibromomethane BDL 0.010 0.0 0.5 4.857E-07 0.54

Bromodichloromethane BDL 0.010 0.0 0.5 4.857E-07 0.54

cis-1,3-Dichloropropene BDL 0.010 0.0 0.5 4.857E-07 0.54
trans-1,3-Dichloropropene BDL 0.007 0.0 0.4 3.400E-07 0.38

Dibromochloromethane BDL 0.009 0.0 0.5 4.371E-07 0.49

Methyl Isobutyl Ketone BDL 0.020 0.0 1.1 9.714E-07 1.09

Methyl Butyl Ketone (2-Hexanone) BDL 0.030 0.0 1.6 1.457E-06 1.63

Toluene ADL 0.240 0.4 13.1 1.166E-05 13.03

Ethylene Dibromide BDL 0.010 0.0 0.5 4.857E-07 0.54

Tetrachloroethylene BDL 0.020 0.0 1.1 9.714E-07 1.09

Chlorobenzene BDL 0.010 0.0 0.5 4.857E-07 0.54

1,1,1,2-Tetrachloroethane BDL 0.010 0.0 0.5 4.857E-07 0.54

Ethylbenzene BDL 0.010 0.0 0.5 4.857E-07 0.54

m / p-Xylene ADL 0.050 0.1 2.7 2.428E-06 2.72

Styrene BDL 0.010 0.0 0.5 4.857E-07 0.54

o-Xylene BDL 0.020 0.0 1.1 9.714E-07 1.09

Bromoform BDL 0.010 0.0 0.5 4.857E-07 0.54

1,1,2,2-Tetrachloroethane BDL 0.010 0.0 0.5 4.857E-07 0.54

1,2,3-Trichloropropane BDL 0.020 0.0 1.1 9.714E-07 1.09

1,3-Dichlorobenzene BDL 0.020 0.0 1.1 9.714E-07 1.09

1,4-Dichlorobenzene BDL 0.020 0.0 1.1 9.714E-07 1.09

1,2-Dichlorobenzene BDL 0.020 0.0 1.1 9.714E-07 1.09

Total VOC 9.03E-05

BDL = Below Detection Limit - All fractions below detection limit

DLL = Detection Limit Limited - Some fractions below detection limit

ADL = Above Detection Limit - All fractions above detection limit

EMSI