From: "Garnett, Nancy" <ngarnett@txi.com>

To: Keith Barnett/RTP/USEPA/US@EPA

Cc: "Faciane, Leo" <lfaciane@txi.com>

Date: 07/02/2009 11:14 AM Subject: RE: THC data for Midlothian

Dear Keith:

Attached is the requested data.

Please call me if you have any questions.

Nancy Garnett 972/647

‐ 3414

‐‐‐‐‐ Original Message ‐‐‐‐‐ From: Barnett.Keith@epamail.epa.gov [mailto:Barnett.Keith@epamail.epa.gov]

Sent: Tuesday, June 09, 2009 11:11 AM

To: Garnett, Nancy

Cc: Faciane, Leo Subject: THC data for Midlothian

Dear Nancy:

As a follow up to the original information collection request we would

like to obtain the last two years of total hydrocarbons data for the

non

‐ hazardous waste firing cement kiln at your Midlothian plant. We

would like to obtain daily averages, dry, corrected to 7 percent oxygen.

Given the unique nature of your installation, (a wet scrubber followed by an RTO), we believe these data may be important in determining long

term THC variability for cement kilns.

Keith W. Barnett USEPA/OAQPS/SPPD/MMG

Mail Code D243

‐ 02

Research Triangle Park, NC 27711

919

‐ 541

‐ 5605 barnett.keith@epa.gov

****************************************************

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****************************************************used in

mact date_mmddyy

yy thc_dayave_ppm _30dayrollingave_p

pm yes 6/1/07 3.6 yes 6/2/07 3.4 yes 6/3/07 3.4 yes 6/4/07 6.7 yes 6/5/07 4.0 yes 6/6/07 7.5 yes 6/7/07 7.5 yes 6/8/07 9.7 yes 6/9/07 2.6 yes 6/10/07 2.4 yes 6/11/07 2.6 yes 6/12/07 3.4 yes 6/13/07 2.7 yes 6/14/07 2.8 yes 6/15/07 2.5 yes 6/16/07 7.6 yes 6/17/07 1.8 yes 6/18/07 1.1 yes 6/19/07 1.4 yes 6/20/07 2.4 yes 6/21/07 2.2 yes 6/22/07 1.9 yes 6/23/07 2.9 yes 6/24/07 4.8 yes 6/25/07 4.1 yes 6/26/07 1.1 yes 6/27/07 2.3 yes 6/28/07 2.2 y yes 6/29/07 1.1 yes 6/30/07 4.2 3.54 yes 7/1/07 9.9 3.75 yes 7/2/07 5.5 3.82 yes 7/3/07 5.0 3.87 yes 7/4/07 4.7 3.81 yes 7/5/07 4.8 3.83 7/6/07 4.9 3.75 7/7/07 4.9 3.66 7/8/07 5.5 3.52 7/9/07 2.9 3.53 7/10/07 7.2 3.69 7/11/07 5.7 3.79 7/12/07 7.4 3.93 7/13/07 25.6 4.69 7/14/07 22.6 5.35 7/15/07 17.7 5.86 7/16/07 14.9 6.10 7/17/07 7.1 6.28 7/18/07 0.3 6.25 7/19/07 8.4 6.48 7/20/07 9.0 6.70used in

mact date_mmddyy

yy thc_dayave_ppm _30dayrollingave_p

pm 7/21/07 9.7 6.95 7/22/07 13.3 7.33 7/23/07 32.4 8.32 7/24/07 15.0 8.66 7/25/07 16.4 9.07 7/26/07 5.7 9.22 7/27/07 0.0 9.14 7/28/07 6.7 9.29 7/29/07 106.1 12.79 7/30/07 7.0 12.88 7/31/07 5.7 12.74

8/1/07 1.4 12.61 8/2/07 2.4 12.52 8/3/07 4.7 12.52 8/4/07 3.8 12.48 8/5/07 4.0 12.45 8/6/07 4.8 12.45 8/7/07 4.8 12.42 8/8/07 5.4 12.51 8/9/07 5.6 12.46 8/10/07 4.4 12.42 8/11/07 3.0 12.27 8/12/07 2.7 11.50 8/13/07 2.7 10.84 8/14/07 2.1 10.32 8/15/07 1.4 9.87 8/16/07 0.7 9.65 8/17/07 0.5 9.66 8/18/07 3.1 9.49 8/19/07 1.9 9.25 8/20/07 2.3 9.00 8/21/07 2.7 8.65 8/22/07 2.8 7.66 8/23/07 2.8 7.26 8/24/07 3.1 6.81 8/25/07 3.2 6.73 8/26/07 4.7 6.89 8/27/07 3.8 6.79 8/28/07 5.1 3.42 8/29/07 5.7 3.38 8/30/07 5.8 3.38 8/31/07 4.9 3.50

9/1/07 7.2 3.66 9/2/07 7.5 3.75 9/3/07 17.2 4.20 9/4/07 6.7 4.29 9/5/07 4.8 4.29 9/6/07 5.9 4.32 9/7/07 5.8 4.34 9/8/07 5.2 4.32used in

mact date_mmddyy

yy thc_dayave_ppm _30dayrollingave_p

pm 9/9/07 5.8 4.37 9/10/07 6.3 4.48 9/11/07 5.9 4.59 9/12/07 5.3 4.67 9/13/07 5.1 4.77 9/14/07 4.1 4.86 9/15/07 3.8 4.97 9/16/07 5.1 5.12 9/17/07 5.0 5.18 9/18/07 3.0 5.22 9/19/07 3.2 5.25 9/20/07 3.7 5.28 9/21/07 4.4 5.34 9/22/07 4.0 5.38 9/23/07 3.3 5.38 9/24/07 1.4 5.32 9/25/07 2.7 5.26 9/26/07 1.3 5.17 9/27/07 1.2 5.04 9/28/07 3.1 4.96 9/29/07 3.8 4.89 9/30/07 2.2 4.80 10/1/07 4.2 4.71 10/2/07 5.5 4.64 10/3/07 5.6 4.26 10/4/07 4.7 4.19 10/5/07 5.1 4.20 10/6/07 5.5 4.18 10/7/07 6.9 4.22 10/8/07 8.6 4.33 10/9/07 9.7 4.46 10/10/07 6.2 4.46 10/11/07 4.9 4.43 10/12/07 1.9 4.31 10/13/07 2.1 4.21 10/14/07 0.8 4.10 10/15/07 1.4 4.02 10/16/07 3.6 3.97 10/17/07 3.6 3.93 10/18/07 2.0 3.90 10/19/07 1.8 3.85 10/20/07 1.0 3.76 10/21/07 0.8 3.64 10/22/07 0.9 3.54 10/23/07 0.9 3.45 10/24/07 1.1 3.45 10/25/07 1.6 3.41 10/26/07 1.2 3.40 10/27/07 0.0 3.36 10/28/07 0.0 3.26used in

mact date_mmddyy

yy thc_dayave_ppm _30dayrollingave_p

pm 10/29/07 0.1 3.14 10/30/07 2.2 3.14 10/31/07 1.3 3.04

11/1/07 1.5 2.91 11/2/07 10.9 3.08 11/3/07 1.9 2.99 11/4/07 2.6 2.91 11/5/07 3.6 2.84 11/6/07 4.1 2.75 11/7/07 2.1 2.53 11/8/07 1.3 2.25 11/9/07 1.2 2.08 11/10/07 2.3 2.00 11/11/07 1.6 1.99 11/12/07 3.1 2.02 11/13/07 4.7 2.15 11/14/07 6.6 2.32 11/15/07 7.9 2.46 11/16/07 8.0 2.61 11/17/07 6.7 2.76 11/18/07 8.2 2.97 11/19/07 6.9 3.17 11/20/07 4.3 3.29 11/21/07 5.3 3.43 11/22/07 5.1 3.57 11/23/07 5.5 3.72 11/24/07 4.4 3.81 11/25/07 5.1 3.94 11/26/07 8.4 4.22 11/27/07 8.7 4.51 11/28/07 8.9 4.80 11/29/07 10.3 5.07 11/30/07 9.4 5.34

12/1/07 10.0 5.62 12/2/07 9.9 5.59 12/3/07 9.0 5.83 12/4/07 6.9 5.97 12/5/07 8.2 6.13 12/6/07 9.6 6.31 12/7/07 8.9 6.54 12/8/07 8.7 6.78 12/9/07 7.2 6.99 12/10/07 7.2 7.15 12/11/07 5.4 7.28 12/12/07 2.3 7.25 12/13/07 4.9 7.26 12/14/07 6.3 7.25 12/15/07 6.3 7.19 12/16/07 5.9 7.13 12/17/07 5.7 7.09used in

mact date_mmddyy

yy thc_dayave_ppm _30dayrollingave_p

pm 12/18/07 9.0 7.12 12/19/07 9.8 7.22 12/20/07 10.0 7.41 12/21/07 9.1 7.53 12/22/07 8.7 7.65 12/23/07 9.5 7.78 12/24/07 7.1 7.87 12/26/07 0.0 7.70 12/27/07 0.0 7.42 12/28/07 0.0 7.14 12/29/07 0.0 6.84 12/30/07 0.0 6.50 12/31/07 0.0 6.18 1/1/08 0.0 5.85 1/2/08 0.0 5.52 1/3/08 2.5 5.30 1/4/08 9.1 5.38 1/5/08 12.4 5.52 1/6/08 11.9 5.59 1/7/08 12.7 5.72 1/8/08 14.0 5.90 1/9/08 10.1 5.99 1/10/08 8.3 6.03 1/11/08 6.1 6.05 1/12/08 4.6 6.13 1/13/08 0.9 6.00 1/14/08 0.0 5.78 1/15/08 2.2 5.65 1/16/08 3.5 5.57 1/17/08 3.2 5.48 1/18/08 3.8 5.31 1/19/08 4.0 5.11 1/20/08 2.0 4.85 1/21/08 2.0 4.61 1/22/08 2.4 4.40 1/23/08 2.2 4.16 1/24/08 1.7 3.98 1/25/08 0.9 4.01 1/26/08 2.7 4.10 1/27/08 2.4 4.18 1/28/08 3.2 4.28 1/29/08 3.0 4.38 1/30/08 4.2 4.52 1/31/08 1.9 4.59

2/1/08 5.4 4.77 2/2/08 4.9 4.85 2/3/08 4.0 4.68 2/4/08 3.9 4.39 2/5/08 4.1 4.14 2/6/08 3.8 3.84used in

mact date_mmddyy

yy thc_dayave_ppm _30dayrollingave_p

pm 2/7/08 3.9 3.50 2/8/08 3.9 3.29 2/9/08 4.4 3.16 2/10/08 4.4 3.10 2/11/08 4.0 3.08 2/12/08 4.0 3.19 2/13/08 65.0 5.35 2/14/08 32.7 6.37 2/15/08 8.1 6.53 2/16/08 4.6 6.57 2/17/08 7.0 6.68 2/18/08 13.4 7.00 2/19/08 4.1 7.06 2/20/08 3.7 7.12 2/21/08 3.4 7.16 2/22/08 3.5 7.20 2/23/08 3.6 7.26 2/24/08 3.6 7.35 2/25/08 3.4 7.38 2/26/08 3.6 7.42 2/27/08 4.4 7.46 2/28/08 3.6 7.48 2/29/08 3.7 7.46

3/1/08 6.0 7.60 3/2/08 5.5 7.60 3/3/08 4.5 7.59 3/4/08 6.0 7.65 3/5/08 6.5 7.74 3/6/08 6.5 7.82 3/7/08 5.9 7.89 3/8/08 5.4 7.94 3/9/08 5.4 8.00 3/10/08 5.2 8.02 3/11/08 5.6 8.06 3/12/08 5.1 8.10 3/13/08 5.5 8.15 3/14/08 5.6 6.17 3/15/08 6.3 5.29 3/16/08 6.5 5.23 3/17/08 6.1 5.28 3/18/08 20.4 5.73 3/19/08 6.1 5.49 3/20/08 5.6 5.54 3/21/08 5.6 5.60 3/22/08 5.6 5.67 3/23/08 5.2 5.73 3/24/08 5.5 5.79 3/25/08 5.4 5.85 3/26/08 5.9 5.94 3/27/08 6.1 6.02used in

mact date_mmddyy

yy thc_dayave_ppm _30dayrollingave_p

pm 3/28/08 5.3 6.05 3/29/08 2.1 6.00 3/30/08 0.8 5.90 3/31/08 3.5 5.82

4/1/08 62.8 7.73 4/2/08 132.6 12.00 4/3/08 43.2 13.24 4/4/08 64.6 15.18 4/5/08 68.6 17.25 4/6/08 51.9 18.78 4/7/08 52.7 20.35 4/8/08 50.2 21.84 4/9/08 11.0 22.04 4/10/08 3.7 21.98 4/11/08 4.1 21.94 4/12/08 4.0 21.90 4/13/08 3.7 21.83 4/14/08 4.0 21.75 4/15/08 3.7 21.66 4/16/08 3.6 21.58 4/17/08 3.5 21.02 4/18/08 3.2 20.92 4/19/08 4.7 20.89 4/20/08 3.9 20.84 4/21/08 4.2 20.79 4/22/08 2.4 20.70 4/23/08 4.2 20.65 4/24/08 10.8 20.83 4/25/08 3.8 20.76 4/26/08 3.6 20.68 4/27/08 3.5 20.62 4/28/08 3.8 20.67 4/29/08 3.9 20.78 4/30/08 2.9 20.76

5/1/08 2.3 18.74 5/2/08 1.3 14.36 5/3/08 1.1 12.96 5/4/08 49.9 12.47 5/5/08 2.6 10.28 5/6/08 2.3 8.62 5/7/08 3.1 6.97 5/8/08 2.5 5.38 5/9/08 3.1 5.12 5/10/08 3.0 5.09 5/11/08 3.4 5.07 5/12/08 28.7 5.89 5/13/08 2.4 5.85 5/14/08 3.2 5.83 5/15/08 3.3 5.82 5/16/08 1.8 5.76used in

mact date_mmddyy

yy thc_dayave_ppm _30dayrollingave_p

pm 5/17/08 2.3 5.71 5/18/08 1.5 5.66 5/19/08 2.4 5.58 5/20/08 3.8 5.58 5/21/08 4.2 5.58 5/22/08 3.8 5.62 5/23/08 3.7 5.61 5/24/08 4.6 5.40 5/25/08 4.3 5.42 5/26/08 2.9 5.39 5/27/08 1.7 5.33 5/28/08 2.3 5.28 5/29/08 2.1 5.22 5/30/08 2.3 5.20 5/31/08 3.4 5.24

6/1/08 4.1 5.33 6/2/08 4.1 5.43 6/3/08 0.6 3.78 6/4/08 3.4 3.81 6/5/08 3.7 3.86 6/6/08 4.5 3.90 6/7/08 5.0 3.99 6/8/08 5.6 4.07 6/9/08 5.0 4.13 6/10/08 3.5 4.14 6/11/08 3.9 3.31 6/12/08 5.3 3.40 6/13/08 5.7 3.49 6/14/08 6.6 3.60 6/15/08 7.5 3.78 6/16/08 7.4 3.95 6/17/08 7.7 4.16 6/18/08 8.7 4.37 6/19/08 9.3 4.56 6/20/08 7.4 4.66 6/21/08 4.2 4.67 6/22/08 4.6 4.70 6/23/08 5.4 4.73 6/24/08 8.7 4.87 6/25/08 7.2 5.02 6/26/08 7.6 5.22 6/27/08 9.1 5.44 6/28/08 8.1 5.64 6/29/08 9.5 5.88 6/30/08 10.2 6.11

7/1/08 10.6 6.32 7/2/08 12.0 6.59 7/3/08 10.9 6.93 7/4/08 9.4 7.13 7/5/08 9.4 7.32used in

mact date_mmddyy

yy thc_dayave_ppm _30dayrollingave_p

pm 7/6/08 9.2 7.48 7/7/08 8.0 7.58 7/8/08 6.4 7.61 7/9/08 5.5 7.63 7/10/08 6.3 7.72 7/11/08 8.4 7.87 7/12/08 142.7 12.45 7/13/08 19.8 12.92 7/14/08 3.8 12.83 7/15/08 5.2 12.75 7/16/08 5.4 12.69 7/17/08 5.4 12.61 7/18/08 5.6 12.50 7/19/08 7.4 12.44 7/20/08 6.9 12.42 7/21/08 7.5 12.54 7/22/08 7.2 12.62 7/23/08 7.8 12.70 7/24/08 7.2 12.65 7/25/08 6.3 12.62 7/26/08 6.6 12.59 7/27/08 7.1 12.52 7/28/08 6.7 12.48 7/29/08 6.2 12.37 7/30/08 7.5 12.28 7/31/08 8.1 12.20

8/1/08 8.5 12.08 8/2/08 6.9 11.95 8/3/08 7.2 11.87 8/4/08 6.7 11.78 8/5/08 4.1 11.61 8/6/08 7.6 11.60 8/7/08 8.3 11.66 8/8/08 8.6 11.77 8/9/08 9.3 11.87 8/10/08 6.8 11.81 8/11/08 6.2 7.27 8/12/08 5.8 6.80 8/13/08 5.4 6.85 8/14/08 5.4 6.86 8/15/08 6.2 6.88 8/16/08 6.3 6.91 8/17/08 6.9 6.96 8/18/08 6.5 6.93 8/19/08 5.1 6.87 8/20/08 5.0 6.79 8/21/08 4.9 6.71 8/22/08 6.1 6.65 8/23/08 4.9 6.58 8/24/08 5.3 6.54used in

mact date_mmddyy

yy thc_dayave_ppm _30dayrollingave_p

pm 8/25/08 8.9 6.62 8/26/08 7.9 6.65 8/27/08 6.4 6.63 8/28/08 4.9 6.59 8/29/08 4.8 6.50 8/30/08 4.0 6.36 8/31/08 4.4 6.23

9/1/08 6.0 6.20 9/2/08 6.9 6.19 9/3/08 9.6 6.29 9/4/08 8.7 6.44 9/5/08 8.4 6.47 9/6/08 6.9 6.42 9/7/08 6.6 6.35 9/8/08 6.0 6.24 9/9/08 6.0 6.21 9/10/08 6.6 6.22 9/11/08 6.3 6.24 9/12/08 8.0 6.33 9/13/08 102.2 9.56 9/15/08 91.7 12.41 9/16/08 7.2 12.43 9/17/08 5.5 12.39 9/18/08 5.6 12.36 9/19/08 6.4 12.40 9/20/08 8.2 12.51 9/21/08 8.9 12.64 9/22/08 9.4 12.75 9/23/08 7.5 12.84 9/24/08 5.9 12.86 9/25/08 6.3 12.77 9/26/08 6.8 12.73 9/27/08 7.4 12.77 9/28/08 5.9 12.80 9/29/08 11.0 13.01 9/30/08 211.0 19.91 10/1/08 135.8 24.28 10/2/08 87.8 27.01 10/3/08 61.4 28.83 10/4/08 101.0 31.87 10/5/08 70.0 33.92 10/6/08 62.2 35.71 10/7/08 176.2 41.35 10/8/08 266.1 50.01 10/9/08 53.6 51.59 10/10/08 50.3 53.07 10/11/08 651.8 74.58 10/12/08 359.5 86.35 10/13/08 16.4 86.63 10/14/08 4.0 83.36used in

mact date_mmddyy

yy thc_dayave_ppm _30dayrollingave_p

pm 10/15/08 4.9 80.47 10/16/08 4.2 80.37 10/17/08 3.9 80.32 10/18/08 3.7 80.25 10/19/08 3.1 80.14 10/20/08 3.1 79.97 10/21/08 2.9 79.77 10/22/08 3.5 79.58 10/23/08 5.1 79.49 10/24/08 4.3 79.44 10/25/08 4.1 79.37 10/26/08 3.9 79.27 10/27/08 4.4 79.17 10/28/08 5.0 79.14 10/29/08 4.2 78.92 10/30/08 4.1 72.02 10/31/08 4.1 67.63

11/1/08 4.4 64.85 11/2/08 4.0 62.94 11/3/08 3.4 59.69 11/4/08 4.3 57.50 11/5/08 3.8 55.55 11/6/08 3.9 49.81 11/7/08 4.1 41.07 11/8/08 3.9 39.41 11/9/08 3.7 37.86 11/10/08 3.4 16.25 11/11/08 3.6 4.38 11/12/08 3.8 3.97 11/13/08 4.2 3.97 11/14/08 3.7 3.93 11/15/08 3.7 3.91 11/16/08 3.7 3.91 11/17/08 4.2 3.92 11/18/08 4.0 3.96 11/19/08 4.1 3.99 11/20/08 4.5 4.04 11/21/08 3.2 4.03 11/22/08 2.8 3.96 11/23/08 3.4 3.93 11/24/08 4.2 3.93 11/25/08 24.8 4.63 11/26/08 253.9 12.95 11/27/08 91.7 15.83 11/28/08 45.0 17.19 11/29/08 38.4 18.34 11/30/08 28.1 19.13

12/1/08 62.5 21.07 12/2/08 4.4 21.08 12/3/08 4.2 21.11used in

mact date_mmddyy

yy thc_dayave_ppm _30dayrollingave_p

pm 12/4/08 4.4 21.11 12/5/08 4.4 21.13 12/6/08 4.3 21.15 12/7/08 4.3 21.15 12/8/08 4.0 21.16 12/9/08 4.1 21.17 12/10/08 3.7 21.18 12/11/08 4.3 21.20 12/12/08 4.7 21.23 12/13/08 4.1 21.23 12/14/08 4.0 21.24 12/15/08 4.3 21.26 12/16/08 4.2 21.28 12/17/08 4.3 21.28 12/18/08 4.6 21.30 12/19/08 4.6 21.31 12/20/08 4.4 21.31 12/21/08 3.9 21.33 12/22/08 5.0 21.41 12/23/08 5.9 21.49 12/24/08 4.2 21.49 12/25/08 4.0 20.79 12/26/08 4.1 12.47 12/27/08 4.3 9.55 12/28/08 4.4 8.20 12/29/08 7.0 7.16 12/30/08 4.2 6.36 12/31/08 4.5 4.43 1/1/09 4.7 4.44 1/2/09 6.3 4.51 1/3/09 36.3 5.57 1/4/09 55.1 7.26 1/5/09 57.4 9.03 1/6/09 35.3 10.06 1/7/09 50.6 11.62 1/8/09 35.4 12.66 1/9/09 65.4 14.71 1/10/09 173.2 20.34 1/12/09 110.0 23.85 1/13/09 116.3 27.59 1/14/09 6.6 27.68 1/15/09 2.9 27.63 1/16/09 3.0 27.59 1/17/09 3.8 27.58 1/18/09 4.0 27.56 1/19/09 2.8 27.50 1/20/09 3.2 27.46 1/21/09 3.7 27.46 1/22/09 6.6 27.51 1/23/09 2.0 27.38used in

mact date_mmddyy

yy thc_dayave_ppm _30dayrollingave_p

pm 1/24/09 2.0 27.30 1/25/09 2.3 27.25 1/26/09 2.9 27.21 1/27/09 2.7 27.16 1/28/09 2.4 27.09 1/29/09 2.6 26.95 1/30/09 3.3 26.91 1/31/09 2.8 26.86

2/1/09 2.5 26.78 2/2/09 1.5 26.62 2/3/09 3.1 25.52 2/4/09 3.0 23.78 2/5/09 3.0 21.97 2/6/09 3.1 20.90 2/7/09 2.8 19.30 2/8/09 3.5 18.24 2/9/09 3.3 16.17 2/10/09 2.7 10.49 2/11/09 2.9 6.92 2/12/09 2.9 3.13 2/13/09 3.0 3.01 2/14/09 3.4 3.03 2/15/09 2.9 3.03 2/16/09 2.9 2.99 2/17/09 2.8 2.95 2/18/09 3.0 2.96 2/19/09 3.0 2.95 2/20/09 3.8 2.96 2/21/09 2.8 2.83 2/22/09 3.1 2.86 2/23/09 2.9 2.89 2/24/09 2.7 2.90 2/25/09 2.7 2.90 2/26/09 2.8 2.90 2/27/09 2.8 2.91 2/28/09 3.2 2.93

3/1/09 2.7 2.91 3/2/09 1.3 2.86 3/3/09 2.3 2.85 3/4/09 2.4 2.88 3/5/09 2.8 2.87 3/6/09 2.7 2.86 3/7/09 2.5 2.85 3/8/09 2.8 2.84 3/9/09 2.3 2.82 3/10/09 2.7 2.79 3/11/09 3.4 2.80 3/12/09 3.0 2.81 3/13/09 2.9 2.81 3/14/09 3.0 2.81used in

mact date_mmddyy

yy thc_dayave_ppm _30dayrollingave_p

pm 3/15/09 3.1 2.82 3/16/09 3.0 2.80 3/17/09 3.1 2.81 3/18/09 2.9 2.81 3/19/09 2.9 2.82 3/20/09 3.0 2.82 3/21/09 3.0 2.81 3/22/09 2.9 2.78 3/23/09 2.8 2.78 3/24/09 2.7 2.77 3/25/09 2.8 2.77 3/26/09 2.5 2.76 3/27/09 2.6 2.76 3/28/09 0.1 2.67 3/29/09 0.0 2.58 3/30/09 2.2 2.55 3/31/09 3.2 2.56

4/1/09 2.9 2.62 4/2/09 3.0 2.64 4/3/09 3.0 2.66 4/4/09 2.8 2.66 4/5/09 3.1 2.67 4/6/09 3.1 2.69 4/7/09 3.5 2.72 4/8/09 2.4 2.72 4/9/09 2.7 2.72 4/10/09 3.3 2.71 4/11/09 3.0 2.72 4/12/09 3.2 2.72 4/13/09 3.3 2.73 4/14/09 3.0 2.73 4/15/09 3.0 2.73 4/16/09 3.0 2.73 4/17/09 3.1 2.73 4/18/09 3.2 2.74 4/19/09 3.2 2.75 4/20/09 3.1 2.75 4/21/09 3.6 2.78 4/22/09 2.9 2.78 4/23/09 3.0 2.79 4/24/09 2.8 2.79 4/25/09 2.8 2.80 4/26/09 2.8 2.80 4/27/09 3.0 2.90 4/28/09 3.2 3.00 4/29/09 7.4 3.18 4/30/09 129.5 7.39

5/1/09 114.7 11.11 5/2/09 69.7 13.34 5/3/09 78.2 15.84used in

mact date_mmddyy

yy thc_dayave_ppm _30dayrollingave_p

pm 5/4/09 124.1 19.89 5/5/09 68.4 22.06 5/6/09 54.1 23.77 5/7/09 62.8 25.74 5/8/09 28.2 26.60 5/9/09 0.0 26.51 5/10/09 0.0 26.40 5/12/09 100.1 29.64 5/13/09 94.0 32.67 5/14/09 7.9 32.82 5/15/09 518.0 49.99 5/18/09 73.5 52.34 5/19/09 4.4 52.38 5/20/09 3.4 52.40 5/21/09 93.0 55.39 5/22/09 73.8 57.74 5/23/09 58.6 59.59 5/24/09 49.3 61.12 5/25/09 0.0 61.02 5/26/09 0.0 60.92 5/27/09 6.4 61.04 5/28/09 10.3 61.29 5/29/09 2.8 61.29 5/30/09 2.5 61.28 5/31/09 2.5 61.26

avg 

### 13.36

651.83 86.63

0.00 1.99

stdev 42.08