STATEMENT OF BASIS. NAICS Description: Fabricated Pipe and Pipe Fitting Manufacturing NAICS Code:

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1 STATEMENT OF BASIS For the issuance of Draft Air Permit # 2147-AR-2 1. PERMITTING AUTHORITY: Arkansas Department of Environmental Quality 5301 Northshore Drive North Little Rock, Arkansas APPLICANT: CB&I El Dorado 205 Louis Hurley Road El Dorado, Arkansas PERMIT WRITER: Elliott Marshall 4. NAICS DESCRIPTION AND CODE: NAICS Description: Fabricated Pipe and Pipe Fitting Manufacturing NAICS Code: ALL SUBMITTALS: Date of Application Type of Application (New, Renewal, Modification, Deminimis/Minor Mod, or Administrative Amendment) Short Description of Any Changes That Would Be Considered New or Modified Emissions 2/1/2017 Deminimis/Modification Add 1,000 gallon gasoline storage tank as a permitted source. 6. REVIEWER S NOTES: CB&I is pipe fabrication facility located at 205 Louis Hurley Road in El Dorado, Arkansas. This modification is to add a gasoline storage tank (SN-06), which was formerly an insignificant activity, into the permit and add NESHAP Subpart CCCCCC conditions. A laser cutting table is also being added to the list of insignificant activities. The permitted emissions are increasing by 0.1 tpy VOC and 0.02 tpy HAPs. 7. COMPLIANCE STATUS: There are no pending or active enforcement actions.

2 Permit #: 2147-AR-2 Page 2 of 5 8. PSD APPLICABILITY: a) Did the facility undergo PSD review in this permit (i.e., BACT, Modeling, etc.)? N b) Is the facility categorized as a major source for PSD? N Single pollutant 100 tpy and on the list of 28 or single pollutant 250 tpy and not on list If yes, explain why this permit modification is not PSD. 9. SOURCE AND POLLUTANT SPECIFIC REGULATORY APPLICABILITY: Source Pollutant N/A Regulation (NSPS, NESHAP or PSD) 10. EMISSION CHANGES AND FEE CALCULATION: See emission change and fee calculation spreadsheet in Appendix A. 11. AMBIENT AIR EVALUATIONS: Criteria Pollutants Examination of the source type, location, plot plan, land use, emission parameters, and other available information indicate that modeling is not warranted at this time. Non-Criteria Pollutants: This permit contains a TLV table for non-criteria pollutants. Modeling was used to determine the permitted emission rates for ranges of non-criteria pollutants (grouped by TLV) that pass the PAER or PAIL. Therefore, modeling of specific non-criteria pollutants was not performed. SN 12. CALCULATIONS: Source (AP-42, testing, etc.) (lb/ton, lb/hr, etc.) Eff. Comments 01a, 01b AP-42, Table lbpm/ton -- 01b AP-42, Table lbpm/ton 20,000 CFM Dust Collector -- 01c AP-42, Table lbpm/ton 25,000-35,000 CFM Dust 95% --

3 SN Permit #: 2147-AR-2 Page 3 of 5 Source (AP-42, testing, etc.) 02 MSDS 04a, 04b 05 AP-42, Table for NO x and CO; AP-42, Table for PM, SO 2,and VOC 06 AP-42 chapter 5.2 (lb/ton, lb/hr, etc.) 3.5 lbs VOC/gal 3.46 lbs HAP/gal lbs PM/gal lb PM/mmbtu lb SO 2 /mmbtu lb NO x /mmbtu lb CO/mmbtu lb VOC/mmbtu lb HAP/mmbtu lb/lb abrasive lb VOC/ 1000 gallons gasoline Collector Airless Spray Gun Transfer Efficiency>Fallout Factor Eff. 65%>0.13% Comments TCEQ Guidance N/A ,000 CFM Dust Collector 99.5% N/A TCEQ Guidance TCEQ Guidance 13. TESTING REQUIREMENTS: The permit requires testing of the following sources. SN Pollutants Test Method Test Interval Justification 14. MONITORING OR CEMS: The permittee must monitor the following parameters with CEMS or other monitoring equipment (temperature, pressure differential, etc.) SN Parameter or Pollutant to be Monitored Method (CEM, Pressure Gauge, etc.) Frequency Report (Y/N) 15. RECORDKEEPING REQUIREMENTS: The following are items (such as throughput, fuel usage, VOC content, etc.) that must be tracked and recorded. SN Recorded Item Permit Limit Frequency Report (Y/N)

4 Permit #: 2147-AR-2 Page 4 of 5 SN Recorded Item Permit Limit Frequency Report (Y/N) 01 Abrasive Blast Media 02 HAPs, VOCs OPACITY: Gasoline Throughput 4900 tons Monthly N 3.5 lbs VOC/gal 3.46 lbs HAP/gal Monthly 3,600 gal/yr Monthly N N SN Opacity Justification for limit 01, 04, 05 20% 02 5% of Regulation 19 and A.C.A as referenced by and of Regulation 18 and A.C.A as referenced by and Compliance Mechanism Inspector Observation 17. DELETED CONDITIONS: Former SC Justification for removal 18. GROUP A INSIGNIFICANT ACTIVITIES: Source Name Group A Cat. Two (2) 250 gallon above ground storage tanks for A-2 diesel storage Welding Operations A-7 PM/ PM 10 Emissions (tpy) SO 2 VOC CO NO x HAPs Single Total Dry Manuel Cutting A-13 Piping fugitives A-13 Blast Media Silo A-13 Shop Gas Heaters A-13 Kerosene Heaters A-13 Steam Clean Heaters A-13

5 Permit #: 2147-AR-2 Page 5 of 5 Source Name Group A Cat. Paint Booth Heaters A-13 Argon Handling and Usage A-13 PM/ PM 10 Emissions (tpy) SO 2 VOC CO NO x Laser Cutting A-13 <0.001 <0.001 HAPs Single Total 19. VOIDED, SUPERSEDED, OR SUBSUMED PERMITS: List all active permits voided/superseded/subsumed by the issuance of this permit. Permit # 2147-AR-1

6 APPENDIX A EMISSION CHANGES AND FEE CALCULATION

7 Fee Calculation for Minor Source Facility Name: CB&I El Dorado Permit Number: 2147-AR-2 Revised Old Permit New Permit $/ton factor Permit Predominant Air Contaminant Minimum Fee $ 400 Net Predominant Air Contaminant Increase 0.1 Minimum Initial Fee $ 500 Permit Fee $ 400 Check if Administrative Amendment Annual Chargeable Emissions (tpy) 21.7 Pollutant (tpy) Old Permit New Permit Change PM PM PM SO VOC CO NO X Total HAP

STATEMENT OF BASIS. NAICS Description: Motor and Generator Manufacturing NAICS Code:

STATEMENT OF BASIS. NAICS Description: Motor and Generator Manufacturing NAICS Code: STATEMENT OF BASIS For the issuance of Draft Air Permit # 0996-AOP-R24 1. PERMITTING AUTHORITY: Arkansas Department of Environmental Quality 5301 Northshore Drive North Little Rock, Arkansas 72118-5317