STATEMENT OF BASIS. NAICS Description: Secondary Smelting, Refining, and Alloying of Nonferrous Metal (except Copper and Aluminum) NAICS Code:

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1 STATEMENT OF BASIS For the issuance of Draft Air Permit # 2318-AR-1 1. PERMITTING AUTHORITY: Arkansas Department of Environmental Quality 5301 Northshore Drive North Little Rock, Arkansas APPLICANT: BlueOak Arkansas, LLC 1024 Olhendorf Road Osceola, Arkansas PERMIT WRITER: Kailin Schwan 4. NAICS DESCRIPTION AND CODE: NAICS Description: Secondary Smelting, Refining, and Alloying of Nonferrous Metal (except Copper and Aluminum) NAICS Code: SUBMITTALS: Date of Application Type of Application (New, Renewal, Modification, Deminimis/Minor Mod, or Administrative Amendment) 5/27/2015 De Minimis Short Description of Any Changes That Would Be Considered New or Modified s Additional equipment: (SN-18a/SN-18b) Indoor ash storage silo/ ash hopper (SN-19a/SN-19b) indoor silica sand & main tap slag storage silo / storage hopper (SN-20) Thermal Reeducation Unit (SN-21) Ball mill (SN-22) Induction Furnace (SN-23) Tundish preheater/ granulator (SN-24) slag overflow preheater (SN-25 & SN-26) two crucible re-melt furnaces (SN-02/03) four (4) 2,000 cubic feet per

2 Page 2 of 13 minute torrid dust collectors Modifications/ Replacements: (SN-11) fabric filter baghouse to high temperature ceramic filter (SN-14) 250kW emergency engine with a 500 kw emergency engine (SN-12) 1.0 MMBTU/hr ladle pre-heater with a 0.7MMBTU/hr natural gas fired ladle pre-heater (SN-13) larger baghouse 6. REVIEWER S NOTES: BlueOak Arkansas, LLC is located at 1024 Olhendorf Road, Osceola Arkansas. BlueOak Arkansas is an electrponic circuit board recycling facility. The facility submitted a De Minimis modification to install an indoor ash storage silo (SN-18a); an indoor ash hopper (SN-18b); an indoor silica sand & main tap slag storage silo (SN-19a); an indoor silica sand & main tap slag storage hopper (SN-19b); a thermal reduction unit (SN-20); a ball mill (SN-21); an induction furnace (SN-22); a Tundish preheater/ granulator (SN-23); a slag overflow preheater (SN-24); and two crucible re-melt furnaces (SN-25 & SN-26). This modification also addresses the installation and operation of up to four (4) 2,000 cubic feet per minute Torit dust collectors inside the main production building replacing the initially permitted control device (SN-02/03). Additionally, the facility has requested the replacement of fabric filter baghouse (SN-11) with high temperature ceramic filter. Additional changes to SN-11include the addition of a cyclone after the afterburner, redesign of internal natural gas burners that will result in a change in emissions, and an addition of a urea injection system to assist in the reduction of NO x emissions from the plasma furnace. Lastly, the facility has requested the replacement of a 250kW emergency engine with a 750 kw diesel-fired emergency engine (SN-14), replacement of a 1.0 MMBTU/hr ladle pre-heater with a 0.7MMBTU/hr natural gas fired ladle pre-heater (SN-12), and a larger baghouse (SN-13) to collect and recover fugitive dust from equipment to be installed to support the laboratory testing, as well as operations associated with the primary process line. Total allowable emission changes are tpy PM, tpy PM10, +0.7 tpy SO2, tpy CO, +5.4 tpy NOx, tpy Lead, +1.0 tpy Hydrochloric Acid, tpy Hydrogen Cyanide, and tpy Formaldehyde. 7. COMPLIANCE STATUS: The following summarizes the current compliance of the facility including active/pending enforcement actions and recent compliance activities and issues. There are no compliance issues at the time of this permit. 8. PSD APPLICABILITY:

3 Page 3 of 13 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: SN-14 Pollutant NO x, CO, VOC Regulation (NSPS, NESHAP or PSD) 40 CFR Part 63, Subpart ZZZZ and 40 CFR Part 60, Subpart IIII 10. EMISSION CHANGES AND FEE CALCULATION: See emission change and fee calculation spreadsheet in Appendix A. 11. AMBIENT AIR EVALUATIONS: a) Reserved. b) Non-Criteria Pollutants: The non-criteria pollutants listed below were evaluated. Based on Department procedures for review of non-criteria pollutants, emissions of all other non-criteria pollutants are below thresholds of concern. 1 st Tier Screening (PAER) Estimated hourly emissions from the following sources were compared to the Presumptively Acceptable Rate (PAER) for each compound. The Department has deemed the PAER to be the product, in lb/hr, of 0.11 and the Threshold Limit Value (mg/m 3 ), as listed by the American Conference of Governmental Industrial Hygienists (ACGIH). Pollutant TLV (mg/m 3 ) PAER (lb/hr) = 0.11 TLV Proposed lb/hr Pass? Lead No Acrolein * POM - Total Yes Dioxin/Furans Yes

4 Page 4 of 13 Pollutant TLV PAER (lb/hr) = (mg/m 3 ) 0.11 TLV Proposed lb/hr Pass? arsenic Yes benzene Yes beryllium Yes cadmium Yes chromium Yes cobalt Yes Dioxin/ Flouride E-08 Yes hydrogen flouride Yes manganese Yes mercury Yes nickel Yes selenium Yes POM Yes * Proposed lb/hr does not include emissions from SN-14 Emergency Generator. TLV less than 1.0 mg/m3 for the above pollutants. 2 nd Tier Screening (PAIL) AERMOD air dispersion modeling was performed on the estimated hourly emissions from the following sources, in order to predict ambient concentrations beyond the property boundary. The Presumptively Acceptable Impact Level (PAIL) for each compound has been deemed by the Department to be one one-hundredth of the Threshold Limit Value as listed by the ACGIH. Pollutant PAIL (μg/m 3 ) = 1/100 of Threshold Limit Value Modeled Concentration (μg/m 3 ) Pass? Lead Pass c) H2S Modeling: A.C.A requires hydrogen sulfide emissions to meet specific ambient standards. Many sources are exempt from this regulation, refer to the Arkansas Code for details.

5 Page 5 of 13 Is the facility exempt from the H2S Standards N Pollutant H2S SN lb/hr Threshold value 20 parts per million (5-minute average*) 80 parts per billion (8-hour average) residential area 100 parts per billion (8-hour average) nonresidential area Modeled Concentration (ppb) ppm Pass? Y 3.89 μg/m 3 = 2.79ppb Y 3.89 μg/m 3 = 2.79ppb Y 12. CALCULATIONS: SN (, testing, etc.) Tectronics Pilot test Manufacture Spec Tectronics Pilot test (, lb/hr, etc.) Lead = 1% of PM 0.01 gr/scf Lead = 1% of PM Baghouse (CD-01) Efficiency 95% Comments WEEE = 11,388 tons/yr WEEE = 11,388 tons/yr 8,000 scfm 11,388 tons/yr

6 Page 6 of 13 SN (, testing, etc.) (, lb/hr, etc.) Efficiency Comments 11,388 tons/yr ,388 tons/yr 11,388 tons/yr 1,139 tons/yr 1,139 tons/yr 11,388 tons/yr 11 Tetronics Pilot test Thermodyna mic Model (Outotec HSC v7.11) Kg/hr PM/PM 10 : 6.8 SO 2 : 0.15 CO: Lead: 22.0 HCL: 3.7 H2S: 0.18 mg/nm 3 NO X : 76.3 VOC: 4.08 Baghouse (CD-02) Afterburne r 98% PM, Lead 98% VOC, CO WEEE hourly feed rate 1.3 tons/hr WEEE annual feed rate 1.17 tons/hr = 10,249 tons/yr Baghouse 12,550

7 Page 7 of 13 SN (, testing, etc.) (, lb/hr, etc.) HCN: Dioxin/Furans: 1.34E-6 Lime Injection Efficiency 90% HCL, HCN Comments scfm 11 Afterburner (Diesel- Fired) NG s only National Pollutant Inventory Sept Table 10 Table EPA Final Tier 2 lb/mmbtu PM/PM 10 : SO 2 : NO X : CO: VOC: Lead: 4.9E-7 POM: 8.65E-8 Formaldehyde: 7.35E-5 PM/PM 10 /Pb 0.01 gr/scf g/hp-hr PM/PM 10 : 0.15 SO 2 : 3.67 NO X : 4.77 CO: 2.6 VOC: 4.77 H 2 SO 4 : lb/mmbtu 1,3-Butadiene: 3.32E-7 Acrolein: 7.84E-7 Formaldehyde: 1.00E-5 POM: 1.42E-6 Baghouse (CD-03) 95% 4.8 MMBtu/hr Temp TBD from testing A-1 IA 1.0 MMBtu/hr A-1 IA 2,365 tons/yr 28,000 scfm 750 HP Diesel Fuel 100 hrs/yr

8 Page 8 of 13 SN (, testing, etc.) (, lb/hr, etc.) Efficiency Comments 6,132 tons/yr 16 Paved Roads: k=0.011 lb PM/VMT k= lb PM 10 /VMT Silt loading sl = 2.0 g/m 2 Haul Trucks 3,064 VMT/yr VMT/hr 2.0 miles round trip P=110 days N=365 days A-13 IA W= 22 tons 17 Mean Wind Speed (U): 1.0 mph 153 tons/yr 18a Moisture Content (M): 1% 18b Table -1 Efficiency (C): 95% Annual Air Pollutant s (Qc) PM: 3.98E-05 PM 10 :1.88E-05 2,065 tons/year Particule Size (k) PM: 0.74 PM 10 : 0.35

9 Page 9 of 13 SN (, testing, etc.) (, lb/hr, etc.) Efficiency Comments lb-emitted/tonthroughput PM 7.7E-04 PM 10 : 3.65E- 04 Mean Wind Speed (U): 1.0 mph 19a Moisture Content (M): 1% Efficiency (C): 95% Table -1 Annual Air Pollutant s (Qc) PM: 1.54E-06 PM 10 :7.30E tons/year 19b Particule Size (k) PM: 0.74 PM 10 : , Table Table lb-emitted/tonthroughput PM 7.7E-04 PM 10 : 3.65E- 04 lb/mmbtu PM/PM 10 : SO 2 : NO X : CO: Baghouse (CD-03) 95% 2.0 MMBTU/hr

10 Page 10 of 13 SN (, testing, etc.) (, lb/hr, etc.) VOC: Lead: 4.9E-7 Efficiency Comments PM: 2.40 PM 10 : 0.31 PM: 0.10 Baghouse (CD-03) 95% 216,000 lbs/yr PM 10 : lb/mmbtu PM/PM 10 : 3.8 MMBTU/hr , MMBTU/hr Table Baghouse 25 Table (CD-03) 95% 1.9 MMBTU/hr 26 SO 2 : NO X : CO: VOC: Lead: 4.9E-7 Baghouse (CD-03) 95% 1.5 MMBTU/hr 13. TESTING REQUIREMENTS: The permit requires testing of the following sources. SN Pollutants Test Method Test Interval Justification 02/03 (CD-01) 11 (CD-02) 13 (CD-03) PM 5 Initial 11 (CD-02) CO CEM Continuously 11 (CD-02) Lead (CD-02) NO X 7E Initial and Every Five Years Initial and Every Five Years To ensure compliance with PM limits To ensure compliance with CO limits To ensure compliance with Pb limits To ensure compliance with NO X limits

11 Page 11 of 13 SN Pollutants Test Method Test Interval Justification 11 (CD-02) HAPs 320 Initial and Every Five Years To ensure compliance with HAP limits and no other HAPs are present 14. MONITORING OR CEMS: SN 02/03, 11, 13 The permittee must monitor the following parameters with CEMS or other monitoring equipment (temperature, pressure differential, etc.) Parameter or Pollutant to be Monitored Baghouse pressure drop, per cell Method (CEM, Pressure Gauge, etc.) Frequency Report (Y/N) pressure gauge Daily N 11 CO CEM Continuously Y 11 Temperature temp monitor Continuously N 11 Afterburner temperature temp monitor Continuously N 11 Lime injection rate Rate monitor Continuously 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) 01 WEEE throughput limits 02/03, 11, 13 Pressure Drop 11,388 tpy Monthly N min 6 max 10 in H 2 O Daily 11 CO s 99.3 tpy Continuously Y Furnace & WEEE throughput limits Temperature 10,249 tpy Monthly N Established by testing Continuously N N

12 Page 12 of 13 SN Recorded Item Permit Limit Frequency Report (Y/N) Afterburner Lime injection rate Molten Metal Alloy Throughput Hours and classification of operation Hours and reason of nonemergency operation Established by testing Monthly 2,365 tpy Monthly N 100 total hrs/yr Monthly N non-emergency not maintenance/testing: 50 hrs/yr, Total: 100 hr/yr Monthly 15 Plasmarok 6,132 tpy Monthly N 16. OPACITY: SN Opacity Justification for limit Compliance Mechanism 23, 24 5% Department Guidance Natural Gas Fuel 02&03, 11, 13, 14, 15 5% Department Guidance Weekly 17, 18a/b, 19a/b 5% Department Guidance While Loading N N 17. DELETED CONDITIONS: Former SC Justification for removal 18. GROUP A INSIGNIFICANT ACTIVITIES: Name Paved Roads SN-16 Group A Category s (tpy) PM/PM 10 SO 2 VOC CO NO x HAPs Single Total A

13 Page 13 of 13 Name Three (3) outdoor storage silos for ash and lime Group A Category s (tpy) PM/PM 10 SO 2 VOC CO NO x HAPs Single Total A VOIDED, SUPERSEDED, OR SUBSUMED PERMITS: List all active permits voided/superseded/subsumed by the issuance of this permit. Permit # 2318-A

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15 APPENDIX A EMISSION CHANGES AND FEE CALCULATION

16 Fee Calculation for Minor Facility Name: BlueOak Arkansas LLC Permit Number: 2318-AR-1 Revised Old Permit New Permit $/ton factor Permit Predominant Air Contaminant Minimum Fee $ 400 Net Predominant Air Contaminant Increase 21 Minimum Initial Fee $ 500 Permit Fee $ Check if Administrative Amendment Annual Chargeable s (tpy) 39.4 Pollutant (tpy) Old Permit New Permit Change PM PM SO VOC CO NO X Lead Dioxin/Furans 2.24E Hydrochloric Acid Hydrogen Sulfide Hydrogen Cyanide ,3-Butadiene Acrolein Formaldehyde POM