## 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 1Summary Time:Start9:44 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-070.50 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 0.50trans-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 0.50trans-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 0.49trans-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 0.48trans-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 0.51trans-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

TEST2 Summary Time:Start13:05 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-070.49 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 0.49trans-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 0.00.5 4.281E-07 0.48 Bromomethane ADL 0.140 0.2 6.8 5.993E-06 6.70 Chloroethane BDL 0.009 0.00.4 3.853E-07 0.43 Trichlorofluoromethane (Freon 11) BDL 0.010 0.00.5 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 0.00.5 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 0.00.5 4.281E-07 0.48 trans-1,2-Dichloroethylene BDL 0.010 0.00.5 4.281E-07 0.48 cis-1,2-Dichloroethylene BDL 0.010 0.00.5 4.281E-07 0.48 Chloroform BDL 0.010 0.00.5 4.281E-07 0.48 1,2-Dichloroethane BDL 0.007 0.00.3 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 0.00.5 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 0.00.5 4.281E-07 0.48 Trichloroethylene BDL 0.010 0.00.5 4.281E-07 0.48 Dibromomethane BDL 0.010 0.00.5 4.281E-07 0.48 Bromodichloromethane BDL 0.010 0.00.5 4.281E-07 0.48 cis-1,3-Dichloropropene BDL 0.010 0.00.5 4.281E-07 0.48trans-1,3-Dichloropropene BDL 0.007 0.00.3 2.997E-07 0.34 Dibromochloromethane BDL 0.009 0.00.4 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 0.00.5 4.281E-07 0.48 Tetrachloroethylene BDL 0.020 0.0 1.0 8.562E-07 0.96 Chlorobenzene BDL 0.010 0.00.5 4.281E-07 0.48 1,1,1,2-Tetrachloroethane BDL 0.010 0.00.5 4.281E-07 0.48 Ethylbenzene BDL 0.010 0.00.5 4.281E-07 0.48 m / p-Xylene ADL 0.030 0.0 1.4 1.284E-06 1.44 Styrene BDL 0.010 0.00.5 4.281E-07 0.48 o-Xylene BDL 0.020 0.0 1.0 8.562E-07 0.96 Bromoform BDL 0.010 0.00.5 4.281E-07 0.48 1,1,2,2-Tetrachloroethane BDL 0.010 0.00.5 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 0.00.5 4.593E-07 0.51 Bromomethane ADL 0.220 0.3 11.4 1.011E-05 11.30 Chloroethane BDL 0.009 0.00.5 4.134E-07 0.46 Trichlorofluoromethane (Freon 11) BDL 0.010 0.00.5 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 0.00.5 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 0.00.5 4.593E-07 0.51 trans-1,2-Dichloroethylene BDL 0.010 0.00.5 4.593E-07 0.51 cis-1,2-Dichloroethylene BDL 0.010 0.00.5 4.593E-07 0.51 Chloroform BDL 0.010 0.00.5 4.593E-07 0.51 1,2-Dichloroethane BDL 0.007 0.00.4 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 0.00.5 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 0.00.5 4.593E-07 0.51 Trichloroethylene BDL 0.010 0.00.5 4.593E-07 0.51 Dibromomethane BDL 0.010 0.00.5 4.593E-07 0.51 Bromodichloromethane BDL 0.010 0.00.5 4.593E-07 0.51 cis-1,3-Dichloropropene BDL 0.010 0.00.5 4.593E-07 0.51trans-1,3-Dichloropropene BDL 0.007 0.00.4 3.215E-07 0.36 Dibromochloromethane BDL 0.009 0.00.5 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 0.00.5 4.593E-07 0.51 Tetrachloroethylene BDL 0.020 0.0 1.0 9.186E-07 1.03 Chlorobenzene BDL 0.010 0.00.5 4.593E-07 0.51 1,1,1,2-Tetrachloroethane BDL 0.010 0.00.5 4.593E-07 0.51 Ethylbenzene BDL 0.010 0.00.5 4.593E-07 0.51 m / p-Xylene ADL 0.020 0.0 1.0 9.186E-07 1.03 Styrene BDL 0.010 0.00.5 4.593E-07 0.51 o-Xylene BDL 0.020 0.0 1.0 9.186E-07 1.03 Bromoform BDL 0.010 0.00.5 4.593E-07 0.51 1,1,2,2-Tetrachloroethane BDL 0.010 0.00.5 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 0.00.5 4.439E-07 0.50 Bromomethane ADL 0.050 0.1 2.5 2.219E-06 2.48 Chloroethane BDL 0.009 0.00.4 3.995E-07 0.45 Trichlorofluoromethane (Freon 11) BDL 0.010 0.00.5 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 0.00.5 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 0.00.5 4.439E-07 0.50 trans-1,2-Dichloroethylene BDL 0.010 0.00.5 4.439E-07 0.50 cis-1,2-Dichloroethylene BDL 0.010 0.00.5 4.439E-07 0.50 Chloroform BDL 0.010 0.00.5 4.439E-07 0.50 1,2-Dichloroethane BDL 0.007 0.00.3 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 0.00.5 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 0.00.5 4.439E-07 0.50 Trichloroethylene BDL 0.010 0.00.5 4.439E-07 0.50 Dibromomethane BDL 0.010 0.00.5 4.439E-07 0.50 Bromodichloromethane BDL 0.010 0.00.5 4.439E-07 0.50 cis-1,3-Dichloropropene BDL 0.010 0.00.5 4.439E-07 0.50trans-1,3-Dichloropropene BDL 0.007 0.00.3 3.107E-07 0.35 Dibromochloromethane BDL 0.009 0.00.4 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 0.00.5 4.352E-07 0.49 Bromomethane ADL 0.030 0.0 1.5 1.306E-06 1.46 Chloroethane BDL 0.009 0.00.4 3.917E-07 0.44 Trichlorofluoromethane (Freon 11) BDL 0.010 0.00.5 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 0.00.5 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 0.00.5 4.352E-07 0.49 trans-1,2-Dichloroethylene BDL 0.010 0.00.5 4.352E-07 0.49 cis-1,2-Dichloroethylene BDL 0.010 0.00.5 4.352E-07 0.49 Chloroform BDL 0.010 0.00.5 4.352E-07 0.49 1,2-Dichloroethane BDL 0.007 0.00.3 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 0.00.5 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 0.00.5 4.352E-07 0.49 Trichloroethylene BDL 0.010 0.00.5 4.352E-07 0.49 Dibromomethane BDL 0.010 0.00.5 4.352E-07 0.49 Bromodichloromethane BDL 0.010 0.00.5 4.352E-07 0.49 cis-1,3-Dichloropropene BDL 0.010 0.00.5 4.352E-07 0.49trans-1,3-Dichloropropene BDL 0.007 0.00.3 3.047E-07 0.34 Dibromochloromethane BDL 0.009 0.00.4 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 0.00.5 4.352E-07 0.49 Tetrachloroethylene BDL 0.020 0.0 1.0 8.705E-07 0.97 Chlorobenzene BDL 0.010 0.00.5 4.352E-07 0.49 1,1,1,2-Tetrachloroethane BDL 0.010 0.00.5 4.352E-07 0.49 Ethylbenzene BDL 0.010 0.00.5 4.352E-07 0.49 m / p-Xylene ADL 0.020 0.0 1.0 8.705E-07 0.97 Styrene BDL 0.010 0.00.5 4.352E-07 0.49 o-Xylene BDL 0.020 0.0 1.0 8.705E-07 0.97 Bromoform BDL 0.010 0.00.5 4.352E-07 0.49 1,1,2,2-Tetrachloroethane BDL 0.010 0.00.5 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

TEST3 Summary Time:Start16:40 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-070.51 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 0.51trans-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 0.49trans-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 0.00.5 4.674E-07 0.52 Acetone (2-Propanone) ADL 0.140 0.27.4 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 0.52trans-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 0.48trans-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 0.00.5 4.322E-07 0.48 1,1,2,2-Tetrachloroethane BDL 0.010 0.00.5 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 0.27.7 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 0.54trans-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 0.00.5 4.857E-07 0.54 1,1,2,2-Tetrachloroethane BDL 0.010 0.00.5 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