qVIRONMENTAL MONITORING LABORATORIES. INC. P.O. Bt•.v 655 [7 624 Ridge •,'ood Road photo,: 601/856-3092

April 21, 2006

EXECUTIVE

SUMMA_RY

OF EMISSIONS

On March 23 and 31, 2006, Environmental

Monitoring

Laboratories

performed

air emissions testing for Columbus

Brick Company

in Columbus,

Mississippi.

Testing

was performed

to determine particulate,

SO2, HC1, and HF, emissions

from the No. 3 Brick Kiln in accordance with requirements

of the Mississippi

Department

of Environmental

Quality. The following

table is a summary

of test results. # per hour

concentration

#/ton produced

Allowable Emissions Particulate 0.64

0.0073 grains/dscf

0.048

0.42 #/ton SOa 8.17

77 ppm

0.60

500 ppm HC1 0.61

11 ppm

0.045

0.26 #/ton HF 0.61

20 ppm

0.045

0.057 #/ton

Mr. Ed Thebaud

of Columbus

Brick Company

coordinated

the testing project.

Otis Rayburn and Bill Norwood

of Environmental

Monitoring

Laboratories

collected

samples.

HC1 and HF samples were shipped

to Oxford Laboratories

Danny Russell

of Environmental

Monitoring Laboratories prepared

a report of testing. Following is a report of the test.1.0 TEST

RESULTS: The following

tables are summaries,

of the measured

flow parameters

and test results for sulfur dioxide emissions

testing done on March 23, 2006, and particulate,

HC1, and HF, emissions

testing done on March 31, 2006, for the No. 3 Brick Kiln at Columbus

Brick Company's

manufacturing facility in Columbus,

Mississippi.

1.1 S02 Emissions

test on March

23, 2006

Time Start Time End S02 EMISSIONS S02 EMISSIONS VOLUMETRIC

FLOWRATE VOLUMETRIC FLOWRATE VELOCITY STACK TEMPERATURE MOISTURE #/hr ppm acfm dscfm ft./sec. F

03/23/03 1003 1109 8.00

17307 10757 31.3300 10.98

2 03/23/03 1125 1229 7.907616905 10407 30.6302 11.66

3

Avg. 03/23/03 1243 1346 8.6080 17551 10801 31.7304 11.50 8.177717254 10655 31.2302 11.381.2

PM, HF, HC1 Emissions

Test on March

31, 2006 Run No Time Start Time End PARTICULATE

EMISSIONS PARTICULATE EMISSIONS PARTICULATE EMISSIONS HC1 EMISSIONS HCI EMISSIONS HC1 EMISSIONS HF EMISSIONS I-• EMISSIONS HF EMISSIONS #/hrgr/dscf #/Ton #/hr ppm#/Ton #/hr ppm#/Ton VOLUMETRIC FLOWRATE acfm VOLUMETRIC FLOWRATE dscfm VELOCITY ft./sec. STACK TEMPERATURE MOISTURE SAMPLE RATE F

% isokinetic

03•1/06 1002 1104 0.77 0.0087 0.0569 0.6110.8 0.0450 0.64 21.2 0.0474 17115

2 03•1/06 11t6 1218 0.79 0.0090 0.0586 0:6210.9 0.0456 0.60 19.8

3 03•1/06 1230 1332 0.37 0.0043 0.0276 0.59 10.6 0.0441 0.5919.7

Avg.

0.64 0.0073 0.0477 0.6110.7 0.0449 0.61 20.2

10222 31.0 30.5

30.2

30.6 325 317

319

320 0.0446 0.0437

0.0452 16847 16718

16893 10274 10133

10210

10.90 11.29 103 11.89 103 104 11.36 1032.0

SOURCE

DESCRIPTION: The No. 3 Kiln is a typical brick tulmel kiln used to fire bricks.

It operates

at a 24 hour and 6 minute cycle. There are 21 car positions

in the kiln and therefore

a 20.99 car per day throughput. Each car has 9216 bricks with a fired weight of 3.35 pounds per brick. Production

rate then is 324 tons per day or 13.5 tons per hour. Production

records

for the days of testing are provided

in Appendix C. The No. 3 Brick Kiln exhausts

to the atmosphere

by way of a 43.5 inch diameter

vertical

stack extending through the roof of the building

housing

the kiln. Two sample ports at 90 ° are provided at a location

104 inches (2.4 diameters)

below the stack exit and 354 inches (8.1diameters)

above an inlet duct.

3.0 TEST PROCEDURES: Test procedures

used are those described

in the Code of Federal.

Regulations,

Title 401 Part 60, Appendix A. Specifically,

Methods

1 through

4 were used to determine

the number

of sample points, volumetric

flowrates,

and moisture

content,

and Method

6 was used to measure

SO2 emissions. The Method

6 option of using a Method

5 sample train for SO2 was used in order to take advantage of simultaneous

determination

with velocity

and moisture.

Particulate

matter and HC1-HF emissions were measured

in a single combined

Method

5 and Method

26A sample train. Sample duration was 60 minutes

for each of triplicate

samples

for the SO2 test and for the PM, HC1, HF test. HC1 and HF samples were shipped to Oxford Laboratories

in Wilmington,

NC for analysis.

A report of that analysis

is provided

in Appendix

C.