MEMORANDUM 

April 13, 2009 

To: P. Leong 

Via: K. Kunaniec 

From: T. Underwood 

Re: Outside Test OS-2766; February 10 and 11, 2009 source test of S-82 

Re: Outside Test OS-2767; February 10 and 11, 2009 source test of S-93 

Re: Outside Test OS-2768; March 17 and 18, 2009 source test of S-93 

Re: Outside Test OS-2769; March 9 and 10, 2009 source test of S-155 

Site No: A2371 

Plant No: 2371; USS POSCO 

A/C No: Title V 

Source No: S-82; Electro-tinning line 

Abated by: A-41; Scrubber 

Source No: S-93; No. 3 Electro-tinning line 

Abated by: A-42; Scrubber 

Source No: S-155; Electro-tinning line #1, Chrome plating bath 

Abated by: A-41; Scrubber 

Cond. No. 7579; Cr+6 0.0015 mg/A-hr enforceable after October 24, 2009; Cr+6 0.006 

mg/A-hr 

By: Avogadro Group 

I have reviewed the source test report cited above and note the following: 

1) Source test was properly notified (NST-1624, NST-1644, and NST-1654). 

2) I did not witness the tests. 

3) The testing appears to have been conducted by personnel who are familiar with 

proper source testing techniques. 

4) Quality assurance procedures were adequate to assure data integrity. 

5) Results of that testing are that quantified emissions were in compliance with the 

emission limits cited above. 

These sources were in compliance with District Regulations. 
USS POSCO Industries March 24, 2009 

2009 Source Test Report 

09079.1, .2 & .6c 15 

TABLE 5-1 

RESULTS SUMMARY 

USS POSCO INDUSTRIES 

S-82 ELECTRO-TINNING LINE #1 

Test No.: 1-Cr-ETL 1 2-Cr-ETL 1 3-CrETL 1 Average 

Date: 2/10/09 2/10/09 2/11/09 

Time: 0935-1237 1302-1504 0903-1400 

Flue Gas: 

Sample Volume, dscf 117.05 118.75 115.67 117.16 

O2, % volume dry 20.71 20.72 20.48 20.64 

CO2, % volume dry 0.04 0.03 0.06 0.04 

Total ampere-hour 12,936 13,728 8,712 11,792 

Stack gas temperature F 67.9 71.6 70.8 70.1 

Moisture content, % vol. 2.09 2.45 2.29 2.28 

Stack flow rate, dscfm 13,227 13,390 13,568 13,395 

Total Chromium: 

ug/dscm 0.2051 0.2349 0.2015 0.2138 

lb/hr 1.02E-05 1.18E-05 1.02E-05 1.07E-05 

mg/amp-hr 0.0011 0.0012 0.0016 0.0013 

Hexavalent Chromium: 

ug/dscm 0.0875 0.0684 0.0580 0.0713 

lb/hr 4.33E-06 3.43E-06 2.95E-06 3.57E-06 

mg/amp-hr 0.0005 0.0003 0.0005 0.0004 

OS-2766
USS POSCO Industries March 24, 2009 

2009 Source Test Report 

09079.1, .2 & .6c 16 

TABLE 5-2 

RESULTS SUMMARY 

USS POSCO INDUSTRIES 

S-93 ELECTRO-TINNING LINE #3 

Test No.: 1-Cr-ETL 3 2-Cr-ETL 3 3-Cr-ETL 3 Average 

Date: 2/10/09 2/11/09 2/11/09 -- 

Time: 1315-1616 1102-1423 1427-1728 -- 

Flue Gas: 

Sample Volume, dscf 107.17 104.28 106.15 105.87 

O2, % volume dry 20.53 20.33 20.29 20.38 

CO2, % volume dry 0.06 0.05 0.03 0.046 

Total ampere-hour 3,564 3,630 3,630 3,608 

Stack gas temperature, F 83.7 83.8 86.3 84.6 

Moisture content, % vol. 2.45 2.98 2.95 2.79 

Stack flow rate, dscfm 11,141 11,109 11,076 11,109 

Total Chromium: 

ug/dscm 0.4613 0.2438 0.2362 0.3137 

lb/hr 1.92E-05 1.01E-05 9.79E-06 1.31E-05 

mg/amp-hr 0.0074 0.0038 0.0037 0.0049 

Hexavalent Chromium: 

ug/dscm 0.2735 0.0677 0.0632 0.1348 

lb/hr 1.14E-05 2.82E-06 2.62E-06 5.61E-06 

mg/amp-hr 0.0044 0.0011 0.0010 0.0021 

OS-2767
USS POSCO Industries March 24, 2009 

2009 Source Test Report 

09079.1, .2 & .6c 17 

TABLE 5-3 

RE-TEST RESULTS SUMMARY 

USS POSCO INDUSTRIES 

S-93 ELECTRO-TINNING LINE #3 

Test No.: 1-Cr-RT 2-Cr-RT 3-Cr-RT Average 

Date: 3/17/09 3/17/09 3/18/09 -- 

Time: 0820-1121 1127-1428 0822-1123 -- 

Flue Gas: 

Sample Volume, dscf 121.34 120.25 120.25 120.62 

O2, % volume dry 20.93 20.95 20.87 20.91 

CO2, % volume dry 0.086 0.204 0.059 0.116 

Total ampere-hour 4,620 4,356 4,290 4,422 

Stack gas temperature, F 91.1 91.9 91.9 91.6 

Moisture content, % vol. 3.26 3.19 3.19 3.21 

Stack flow rate, dscfm 10,411 10,466 10,470 10,449 

Total Chromium: 

ug/dscm 0.1862 0.3230 0.1586 0.2226 

lb/hr 7.26E-06 1.27E-05 6.21E-06 8.71E-06 

mg/amp-hr 0.0021 0.0040 0.0020 0.0027 

Hexavalent Chromium: 

ug/dscm 0.0141 0.0774 0.0710 0.0542 

lb/hr 5.51E-07 3.03E-06 2.78E-06 2.12E-06 

mg/amp-hr 0.0002 0.0009 0.0009 0.0007 

OS-2768
USS POSCO Industries March 24, 2009 

2009 Source Test Report 

09079.1, .2 & .6c 18 

TABLE 5-4 

RESULTS SUMMARY 

USS POSCO INDUSTRIES 

S-155 ELECTRO-TINNING LINE #1 TFS 

Test No.: 1-Cr-ETL 1 2-Cr-ETL 1 3-Cr-ETL 1 Average 

Date: 3/9/09 3/10/09 3/10/09 -- 

Time: 1201-1502 1115-1452 1500-1801 -- 

Flue Gas: 

Sample Volume, dscf 116.31 119.28 116.10 117.23 

O2, % volume dry 20.90 20.90 20.90 20.90 

CO2, % volume dry 1.00 1.00 1.00 1.00 

Total ampere-hour 82,200 89,100 84,600 85,300 

Stack gas temperature F 84.3 84.7 85.8 84.9 

Moisture content, % vol. 3.56 3.48 3.81 3.61 

Stack flow rate, dscfm 9,339 9,367 9,321 9,342 

Total Chromium: 

ug/dscm 0.2307 0.2812 0.2220 0.2447 

lb/hr 8.065E-06 9.859E-06 7.746E-06 8.56E-06 

mg/amp-hr 0.0001 0.0002 0.0001 0.0001 

Hexavalent Chromium: 

ug/dscm 0.0692 0.0870 0.0766 0.0776 

lb/hr 2.42E-06 3.05E-06 2.67E-06 2.71E-06 

mg/amp-hr 0.00004 0.00005 0.00004 0.00004 

OS-2769