No violations were noted at the time of the inspection. Please refer to the attached inspection report for any comments.

April 25, 2016 Mary Emily Slate, Vice President Nucor Steel P.O. Box 30 Armorel, AR 72310 RE: Nucor Steel/Hickman Hill Inspection AFIN: 47-00233 Permit No.: AR0045977 Dear Ms. Slate: On March 29, 2016, I performed a Compliance Sampling Inspection of the above referenced facility in accordance with the provisions of the Federal Clean Water Act, the Arkansas Water and Air Pollution Control Act, and the regulations promulgated thereunder. A copy of the inspection report is enclosed for your records. No violations were noted at the time of the inspection. Please refer to the attached inspection report for any comments. If I can be of any assistance, please contact me at 870-935-7221 ext.-15 or frasher@adeq.state.ar.us. Sincerely, Sarah Frasher District 3 Field Inspector Water Division Page 1 of 32

WATER DIVISION INSPECTION REPORT AFIN: 47-00233 PERMIT #: AR0045977 DATE: 3/29/2016 COUNTY: 47 Mississippi PDS #: MEDIA: WN GPS LAT: 35.944321 LONG: -89.721242 LOCATION: Entrance FACILITY INFORMATION INSPECTION INFORMATION NAME: Nucor Steel/Hickman Hill LOCATION: FACILITY TYPE: 2 - Industrial INSPECTOR ID#: 112347 S - State FACILITY EVALUATION RATING: INSPECTION TYPE: 7301 East CR 142 3 - Satisfactory Compliance Sampling CITY: DATE(S): ENTRY TIME: EXIT TIME: PERMIT EFFECTIVE DATE: Blytheville 3/29/2016 09:50 15:15 7/1/2011 RESPONSIBLE OFFICIAL 3/30/2016 10:25 11:40 PERMIT EXPIRATION DATE: NAME: / TITLE 6/30/2016 Mary Emily Slate / Vice President COMPANY: FAYETTEVILLE SHALE RELATED: N Nucor Steel MAILING ADDRESS: P.O. Box 30 CITY, STATE, ZIP: Armorel AR 72310 PHONE & EXT: / FAX: 870-762-2100 / 870-762-5229 EMAIL: CONTACTED DURING INSPECTION: No FAYETTEVILLE SHALE VIOLATIONS: N INSPECTION PARTICIPANTS NAME/TITLE/PHONE/FAX/EMAIL/ETC.: Wayne Turney/Environmental Manager/870-762-2100 ext.-1179 Kimberly Rhodes/Environmental Coordinator/870-762- 2100 ext.-1496 Corey Morrow/Environmental Engineer/870-762-2100 ext.-1431 Jay Mitchell/Coldwell and Sanitary Wastewater Operator Robert Chandler/Hot Mill Water Operator J.D. Harris/ Environmental Coordinator AREA EVALUATIONS (S=Satisfactory, M=Marginal, U=Unsatisfactory, N=Not Applicable/Evaluated) S PERMIT S FLOW MEASUREMENT N STORMWATER S RECORDS/REPORTS S LABORATORY S FACILITY SITE REVIEW S OPERATION & MAINTENANCE S EFFLUENT/RECEIVING WATER S SELF-MONITORING PROGRAM S SAMPLING S SLUDGE HANDLING/DISPOSAL N PRETREATMENT N OTHER: SUMMARY OF FINDINGS No violations were noted at the time of the inspection. Samples were collected and analyzed for various water quality parameters at Outfall 002 and Outfall 004. No permit violations were noted. Please view attached Tables 1-4 for further reference. GENERAL COMMENTS Brent Walker, District 3 Water Inspector, and Jason Bolenbaugh, Inspection Branch Manager, also participated in this inspection. The facility should remember to record instantaneous flow for grab samples. This flow measurement is used to calculate the mass loading of the sample. Totalizers should be used to record flow for the majority of the day the composite sample was collected. INSPECTOR S SIGNATURE: Sarah Frasher DATE: 4/21/2016 SUPERVISOR S SIGNATURE: Jason Bolenbaugh DATE: 4/25/2016 Inspection Report Page 2 of 32

SECTION A: PERMIT VERIFICATION PERMIT SATISFACTORILY ADDRESSES OBSERVATIONS S M U NA NE DETAILS: 1. CORRECT NAME AND MAILING ADDRESS OF PERMITTEE: Y N NA NE 2. NOTIFICATION GIVEN TO EPA/STATE OF NEW DIFFERENT OR INCREASED DISCHARGES: Y N NA NE 3. NUMBER AND LOCATION OF DISCHARGE POINTS AS DESCRIBED IN PERMIT: Y N NA NE 4. ALL DISCHARGES ARE PERMITTED: Y N NA NE SECTION B: RECORDKEEPING AND REPORTING EVALUATION RECORDS AND REPORTS MAINTAINED AS REQUIRED BY PERMIT S M U NA NE DETAILS: 1. ANALYTICAL RESULTS CONSISTENT WITH DATA REPORTED ON DMRS: Y N NA NE 2. SAMPLING AND ANALYSES DATA ADEQUATE AND INCLUDE: S M U NA NE a. DATES AND TIME(S) OF SAMPLING: Y N NA NE b. EXACT LOCATION(S) OF SAMPLING: Y N NA NE c. NAME OF INDIVIDUAL PERFORMING SAMPLING: Y N NA NE d. ANALYTICAL METHODS AND TECHNIQUES: Y N NA NE e. RESULTS OF CALIBRATIONS: Y N NA NE f. RESULTS OF ANALYSES: Y N NA NE g. DATES AND TIMES OF ANALYSES: Y N NA NE h. NAME OF PERSON(S) PERFORMING ANALYSES: Y N NA NE 3. LABORATORY EQUIPMENT CALIBRATION AND MAINTENANCE RECORDS ADEQUATE: S M U NA NE 4. PLANT RECORDS INCLUDE SCHEDULES, DATES OF EQUIPMENT MAINTENANCE AND REPAIR: S M U NA NE 5. EFFLUENT LOADINGS CALCULATED USING DAILY EFFLUENT FLOW AND DAILY ANALYTICAL DATA: Y N NA NE SECTION C: OPERATIONS AND MAINTENANCE TREATMENT FACILITY PROPERLY OPERATED AND MAINTAINED S M U NA NE DETAILS: 1. TREATMENT UNITS PROPERLY OPERATED: S M U NA NE 2. TREATMENT UNITS PROPERLY MAINTAINED: S M U NA NE 3. STANDBY POWER OR OTHER EQUIVALENT PROVIDED: S M U NA NE 4. ADEQUATE ALARM SYSTEM FOR POWER OR EQUIPMENT FAILURES AVAILABLE: Radio alarm notifies employees S M U NA NE 5. ALL NEEDED TREATMENT UNITS IN SERVICE: S M U NA NE 6. ADEQUATE NUMBER OF QUALIFIED OPERATORS PROVIDED: S M U NA NE 7. SPARE PARTS AND SUPPLIES INVENTORY MAINTAINED: S M U NA NE 8. OPERATION AND MAINTENANCE MANUAL AVAILABLE: Y N NA NE 9. STANDARD OPERATING PROCEDURES AND SCHEDULES ESTABLISHED: Y N NA NE 10. PROCEDURES FOR EMERGENCY TREATMENT CONTROL ESTABLISHED: Y N NA NE 11. HAVE BYPASSES/OVERFLOWS OCCURRED AT THE PLANT OR IN THE COLLECTION SYSTEM IN THE LAST YEAR: Y N NA NE 12. IF SO, HAS THE REGULATORY AGENCY BEEN NOTIFIED: Y N NA NE 13. HAS CORRECTIVE ACTION BEEN TAKEN TO PREVENT ADDITIONAL BYPASSES/OVERFLOWS: Y N NA NE 14. HAVE ANY HYDRAULIC OVERLOADS OCCURRED AT THE TREATMENT PLANT: Y N NA NE 15. IF SO, DID PERMIT VIOLATIONS OCCUR AS A RESULT: Y N NA NE Inspection Report Page 3 of 32

SECTION D: SAMPLING PERMITTEE SAMPLING MEETS PERMIT REQUIREMENTS S M U NA NE DETAILS: 1. SAMPLES TAKEN AT SITE(S) SPECIFIED IN PERMIT: Outfall 004 and Outfall 002 Y N NA NE 2. LOCATIONS ADEQUATE FOR REPRESENTATIVE SAMPLES: Y N NA NE 3. FLOW PROPORTIONED SAMPLES OBTAINED WHEN REQUIRED BY PERMIT: Y N NA NE 4. SAMPLING AND ANALYSES COMPLETED ON PARAMETERS SPECIFIED IN PERMIT: Y N NA NE 5. SAMPLING AND ANALYSES PERFORMED AT FREQUENCY SPECIFIED IN PERMIT: Y N NA NE 6. SAMPLE COLLECTION PROCEDURES ADEQUATE: Y N NA NE a. SAMPLES REFRIGERATED DURING COMPOSITING: Y N NA NE b. PROPER PRESERVATION TECHNIQUES USED: Y N NA NE c. CONTAINERS AND SAMPLE HOLDING TIMES CONFORM TO 40 CFR 136: Y N NA NE 7. IF MONITORING IS PERFORMED MORE OFTEN THAN REQUIRED ARE RESULTS REPORTED ON THE DMR: Y N NA NE SECTION E: FLOW MEASUREMENT PERMITTEE FLOW MEASUREMENT MEETS PERMIT REQUIREMENTS DETAILS: 1. PRIMARY FLOW MEASUREMENT DEVICE PROPERLY INSTALLED AND MAINTAINED: Yes TYPE OF DEVICE: For Outfall 004: Rosemount Flow Meter. For Outfall 002: 60 v-notch weir S M U NA NE Y N NA NE 2. FLOW MEASURED AT EACH OUTFALL AS REQUIRED: Y N NA NE 3. SECONDARY INSTRUMENTS (TOTALIZERS, RECORDERS, ETC.) PROPERLY OPERATED AND MAINTAINED: For Outfall 002: ISCO 4280 Bubbler Flow Meter Y N NA NE 4. CALIBRATION FREQUENCY ADEQUATE: Once a year Y N NA NE 5. RECORDS MAINTAINED OF CALIBRATION PROCEDURES: Y N NA NE 6. CALIBRATION CHECKS DONE TO ASSURE CONTINUED COMPLIANCE: Y N NA NE 7. FLOW ENTERING DEVICE WELL DISTRIBUTED ACROSS THE CHANNEL AND FREE OF TURBULENCE: Y N NA NE 8. FLOW MEASUREMENT EQUIPMENT ADEQUATE TO HANDLE EXPECTED RANGE OF FLOW RATES: Y N NA NE 9. HEAD MEASURED AT PROPER LOCATION: Y N NA NE SECTION F: LABORATORY PERMITTEE LABORATORY PROCEDURES MEET PERMIT REQUIREMENTS DETAILS: S M U NA NE 1. EPA APPROVED ANALYTICAL PROCEDURES USED (40 CFR 136.3 FOR LIQUIDS, 503.8(B) FOR SLUDGES) : Y N NA NE 2. IF ALTERNATIVE ANALYTICAL PROCEDURES ARE USED, PROPER APPROVAL HAS BEEN OBTAINED: Y N NA NE 3. SATISFACTORY CALIBRATION AND MAINTENANCE OF INSTRUMENTS AND EQUIPMENT: Y N NA NE 4. QUALITY CONTROL PROCEDURES ADEQUATE: Y N NA NE 5. DUPLICATE SAMPLES ARE ANALYZED >10% OF THE TIME: Y N NA NE 6. SPIKED SAMPLES ARE ANALYZED >10% OF THE TIME: Y N NA NE 7. COMMERCIAL LABORATORY USED: Y N NA NE a. LAB NAME: American Interplex b. LAB ADDRESS: Little Rock, AR c. PARAMETERS PERFORMED: CBOD5, TSS, NH3-N, FCB, O & G, Lead total recoverable, Zinc total recoverable, Nickel total recoverable, Chromium total recoverable, and Acute WET Testing 8. BIOMONITORING PROCEDURES ADEQUATE: Y N NA NE a. PROPER ORGANISMS USED: Y N NA NE b. PROPER DILUTION SERIES FOLLOWED: Y N NA NE c. PROPER TEST METHODS AND DURATION: Y N NA NE d. RETESTS AND/OR TRE PERFORMED AS REQUIRED: Y N NA NE Inspection Report Page 4 of 32

SECTION G: EFFLUENT/RECEIVING WATERS OBSERVATIONS BASED ON VISUAL OBSERVATIONS ONLY S M U NA NE DETAILS: OUTFALL #: OIL SHEEN GREASE TURBIDITY VISIBLE FOAM FLOATING SOLIDS COLOR OTHER 004 None None Low None None clear -- 002 None None Low None None clear SECTION H: SLUDGE DISPOSAL SLUDGE DISPOSAL MEETS PERMIT REQUIREMENTS S M U NA NE DETAILS: Disposed at the Mississippi County Landfill 1. SLUDGE MANAGEMENT ADEQUATE TO MAINTAIN EFFLUENT QUALITY: S M U NA NE 2. SLUDGE RECORDS MAINTAINED AS REQUIRED BY 40 CFR 503: S M U NA NE 3. FOR LAND APPLIED SLUDGE, TYPE OF LAND APPLIED TO: (E.G., FOREST, AGRICULTURAL, PUBLIC CONTACT SITE): SECTION I: SAMPLING INSPECTION PROCEDURES SAMPLE RESULTS WITHIN PERMIT REQUIREMENTS S M U NA NE DETAILS: 1. SAMPLES OBTAINED THIS INSPECTION: Y N NA NE 2. TYPE OF SAMPLE: GRAB: COMPOSITE: METHOD: Composite Sampler FREQUENCY: 24-hours 3. SAMPLES PRESERVED: Y N NA NE 4. FLOW PROPORTIONED SAMPLES OBTAINED: Y N NA NE 5. SAMPLE OBTAINED FROM FACILITY'S SAMPLING DEVICE: Y N NA NE 6. SAMPLE REPRESENTATIVE OF VOLUME AND NATURE OF DISCHARGE: Y N NA NE 7. SAMPLE SPLIT WITH PERMITTEE: Y N NA NE 8. CHAIN-OF-CUSTODY PROCEDURES EMPLOYED: Y N NA NE 9. SAMPLES COLLECTED IN ACCORDANCE WITH PERMIT: Y N NA NE SECTION J: STORM WATER POLLUTION PREVENTION PLAN STORM WATER MANAGEMENT MEETS PERMIT REQUIREMENTS S M U NA NE DETAILS: 1. SWPPP UPDATED AS NEEDED: DATE OF LAST UPDATE: Y N NA NE 2. SITE MAP INCLUDING ALL DISCHARGES AND SURFACE WATERS: Y N NA NE 3. POLLUTION PREVENTION TEAM IDENTIFIED: Y N NA NE 4. POLLUTION PREVENTION TEAM PROPERLY TRAINED: Y N NA NE 5. LIST OF POTENTIAL POLLUTANT SOURCES: Y N NA NE 6. LIST OF POTENTIAL SOURCES AND PAST SPILLS AND LEAKS: Y N NA NE 7. ALL NON-STORM WATER DISCHARGES ARE AUTHORIZED: Y N NA NE 8. LIST OF STRUCTURAL BMPS: Y N NA NE 9. LIST OF NON-STRUCTURAL BMPS: Y N NA NE 10. BMPS PROPERLY OPERATED AND MAINTAINED: Y N NA NE 11. INSPECTIONS CONDUCTED AS REQUIRED: Y N NA NE Inspection Report Page 5 of 32

FLOW CALCULATION SHEET Outfall 002 Date: 3/30/2016 Time: 11:36 Head in Inches: 2.4 Feet: 0.2 Type & Size of Primary Flow Measurement Device: 60 v-notch weir Name & Model of Secondary Flow Measurement Device: ISCO 4280 Bubbler Flow Meter Date of last Calibration of Secondary Flow Device: 2/3/2016 Recorded Flow at Date & Time Listed Above: 11.2 (Facility Flow Meter) Calculated Flow at Date & Time Listed Above: 11.58 (Flow is calculated using flow charts in: ISCO Open Channel Flow Measurement Handbook-5 th Edition) % Error = % Error = Recorded Value - Calculated Value Calculated Value 11.2-11.58 11.58 X 100 X 100 % Error = -0.38 11.58 X 100 % Error = -0.033 X 100 % Error = -3.28 % Comments: Within ±10% as required by the permit Inspection Report Page 6 of 32

Outfall 004: DMR Calculation Check Reporting Period: From 2015 02 01 To 2015 02 28 Year Month Day Year Month Day Parameter Checked: TSS Loading Concentration Mass Monthly Mo. Avg. - lbs/day Mo. Avg. - mg/l Daily Max - mg/l Reported Value: 52 7.6 7.6 Calculated Value: 52 7.6 7.6 Permit Value: 452 Report Report If calculated value does not equal reported value, explain: Equal Inspection Report Page 7 of 32

Outfall 004: DMR Calculation Check Reporting Period: From 2015 08 01 To 2015 08 31 Year Month Day Year Month Day Parameter Checked: O & G Loading Concentration Mass Monthly Mo. Avg. - lbs/day Mo. Avg. - mg/l Daily Max - mg/l Reported Value: 33 6 6 Calculated Value: 33 6 6 Permit Value: 154 Report Report If calculated value does not equal reported value, explain: Equal Inspection Report Page 8 of 32

Outfall 002: DMR Calculation Check Reporting Period: From 2015 02 01 To 2015 02 28 Year Month Day Year Month Day Parameter Checked: NH3-N Loading Concentration Mass Monthly Mo. Avg. - lbs/day Mo. Avg. - mg/l 7-day Avg. - mg/l Reported Value: <0 <0.2 <0.2 Calculated Value: <0 <0.2 <0.2 Permit Value: 1.3 5 7.5 If calculated value does not equal reported value, explain: Equal Inspection Report Page 9 of 32

Outfall 002: DMR Calculation Check Reporting Period: From 2015 09 01 To 2015 09 30 Year Month Day Year Month Day Parameter Checked: TSS Loading Concentration Mass Monthly Mo. Avg. - lbs/day Mo. Avg. - mg/l Daily Max - mg/l Reported Value: 0.8 7.6 8 Calculated Value: 0.8 7.6 8 Permit Value: 5.0 20 30 If calculated value does not equal reported value, explain: Equal Inspection Report Page 10 of 32

Table 1. ADEQ laboratory and permittee split sample collection water quality parameter measurements for Outfall 002 at Nucor Steel. The discharge limitations are displayed from the permit. Water Quality Parameters Concentration Permit Limits ADEQ Lab Permittee Split Units Monthly Avg. Daily Max Composite Flow 0.009981 0.009981 MGD Report (MGD) Report (MGD) Instantaneous Flow 0.00936 0.00936 MGD N/A N/A Carbonaceous Biochemical Oxygen Demand (CBOD5) 1.5 <2 mg/l 20 mg/l 20 mg/l Total Suspended Solids (TSS) 5.7 6 mg/l 20 mg/l 30 mg/l Ammonia Nitrogen (NH3-N) <0.03 0.6 mg/l 10 mg/l 14.7 mg/l Dissolved Oxygen (DO) 4.5 4.7 mg/l 2.0 mg/l (Inst. Min.) Fecal Coliform Bacteria (FCB) <4 N/E cfu/100 ml 1,000 cfu/100 ml 2,000 cfu/100ml Oil and Grease (O & G) <2.5 <5 mg/l 10 mg/l 15 mg/l ph 7.1 7.0 s.u. Minimum 6.0 s.u. Maximum 9.0 s.u. Table 2. ADEQ laboratory and permittee split sample collection mass loading results for Outfall 002 at Nucor Steel. The discharge limitations are displayed from the permit. Water Quality Parameters Mass Loading (lbs/day) Permit Limits (lbs/day) ADEQ Lab Permittee Split Monthly Avg. Daily Max Flow N/A N/A N/A N/A Carbonaceous Biochemical Oxygen Demand (CBOD5) 0.1 <0.2 3.8 5.6 Total Suspended Solids (TSS) 0.5 0.5 5.0 7.5 Ammonia Nitrogen (NH3-N) <0.002 0.05 5.0 7.5 Dissolved Oxygen (DO) N/A N/A 2.5 3.7 Fecal Coliform Bacteria (FCB) N/A N/A N/A N/A Oil and Grease (O & G) <0.2 <0.4 2.5 3.8 ph N/A N/A N/A N/A Inspection Report Page 11 of 32

Table 3. ADEQ laboratory and permittee split sample collection water quality parameter measurements for Outfall 004 at Nucor Steel. The discharge limitations are displayed from the permit. Water Quality Parameters Concentration Permit Limits ADEQ Lab Permittee Split Units Monthly Avg. Daily Max Flow 0.791233 0.791233 MGD Report (MGD) Report (MGD) Total Suspended Solids (TSS) 6.5 6.4 mg/l Report Report Oil and Grease (O & G) <2.5 <5 mg/l 10 mg/l 15 mg/l Lead, Total recoverable <1 <0.5 µg/l Report Report Zinc, Total recoverable 23.2 20.0 µg/l Report Report Nickel, Total recoverable 5.76 9.9 µg/l Report Report Chromium, Total recoverable 1.09 <10 µg/l Report Report ph 8.0 7.9 s.u. Minimum 6.0 s.u. Maximum 9.0 s.u. Table 4. ADEQ laboratory and permittee split sample collection mass loading results for Outfall 004 at Nucor Steel. The discharge limitations are displayed from the permit. Water Quality Parameters Mass Loading (lbs/day) Permit Limits (lbs/day) ADEQ Lab Permittee Split Monthly Avg. Daily Max Flow N/A N/A N/A N/A Total Suspended Solids (TSS) 42.89 42.23 452 1,171 Oil and Grease (O & G) <16.50 <32.99 154 364 Lead, Total recoverable <0.007 <0.003 1.42 3.28 Zinc, Total recoverable 0.15 0.13 1.53 4.61 Nickel, Total recoverable 0.038 0.065 0.038 0.113 Chromium, Total recoverable 0.007 <0.066 0.05 0.125 ph N/A N/A N/A N/A Inspection Report Page 12 of 32

5301 Northshore Drive North Little Rock, AR 72118 Telephone: 501-682-0744 Client Report For: Nucor Steel-Hickman Mill AR0045977 2016 0956-0957 Attention: Client Address:, Report Date: April 18, 2016 LAB ID: AR16MAR30-04 Comment: Approved By: Date: April 18, 2016 Inspection Report Page 13 of 32

Client: CSI Client Sample ID: Outfall 002 Lab ID: 2016-0956 Collection Date: 3/30/2016 11:28:00 AM Matrix: Water Analyses Fecal Coliforms SM 9222 D Batch: 16033105 Run: 1 Result Reporting Limit MDL Qual Unit Fecal Coliforms <4 4 4 cfu/100ml Melanie Treat Analysis Date/Time 3/30/2016 16:12 Inspection Report Page 14 of 32

Client: CSI Client Sample ID: Outfall 004 Lab ID: 2016-0957 Collection Date: 3/30/2016 11:00:00 AM Matrix: Water Analyses Total Metals by EPA 200.8 EPA 200.8 Batch: 16041201 Run: 1 Result Reporting Limit MDL Qual Unit Aluminum 43.0 20 20 ug/l Antimony 43.6 10 5 ug/l Arsenic 5.55 1 0.5 ug/l Barium 52.0 10 2.0 ug/l Beryllium <0.5 0.5 0.1 ug/l Boron 82.1 25 5.0 ug/l Cadmium <1 1 0.3 ug/l Chromium 1.09 1 0.3 ug/l Cobalt <1 1 0.5 ug/l Copper 4.48 1 0.5 ug/l Iron 235 20 10.0 ug/l Lead <1 1 0.1 ug/l Magnesium 3.68 0.1 0.1 mg/l Manganese 50.3 1 0.2 ug/l Nickel 5.76 2.5 0.5 ug/l Potassium 12.4 1 0.05 mg/l Selenium <2 2 0.5 ug/l Silver <5 5 1.0 ug/l Sodium 68.7 0.04 0.02 mg/l Thallium <2.5 2.5 0.05 ug/l Vanadium <2.5 2.5 1.0 ug/l Zinc 23.2 3 2.0 ug/l Robert Graddy Analysis Date/Time Apr 8 2016 10:32AM Prep By Prep Date/Time Total Metals by EPA 200.8 EPA 200.8 Batch: 16041201 Run: 2 Result Reporting Limit MDL Qual Unit Calcium 166 0.4 0.04 mg/l 0 Robert Graddy Analysis Date/Time Apr 8 2016 11:25AM Prep By Prep Date/Time Inspection Report Page 15 of 32

Client: CSI Client Sample ID: Outfall 002 Lab ID: 2016-0956 Collection Date: 3/30/2016 11:28:00 AM Matrix: Water Analyses Ammonia as Nitrogen SM 4500-NH3 H (20th) Batch: 16040401 Run: 1 Result Reporting Limit MDL Qual Unit Ammonia as N <0.03 0.03 0.03 mg/l Chad Carrington Analysis Date/Time 3/30/2016 4:13:11 PM Carb. Biochemical Oxygen Demand (CBOD) 5 Day SM 5210-B Batch: 16041801 Run: 1 Result Reporting Limit MDL Qual Unit Carbonaceous BOD 1.50 0.2 0.2 mg/l Robert Graddy Analysis Date/Time 3/30/2016 12:40 Total Suspended Solids EPA 160.2 Batch: 16041206 Run: 1 Result Reporting Limit MDL Qual Unit Total Suspended Solids 5.7 1.0 1.0 mg/l Analysis Date/Time 3/24/2016 7:30 Inspection Report Page 16 of 32

Client: CSI Client Sample ID: Outfall 004 Lab ID: 2016-0957 Collection Date: 3/30/2016 11:00:00 AM Matrix: Water Analyses Total Suspended Solids EPA 160.2 Batch: 16041206 Run: 1 Result Reporting Limit MDL Qual Unit Total Suspended Solids 6.5 1.0 1.0 mg/l Analysis Date/Time 3/24/2016 7:30 Inspection Report Page 17 of 32

Client: CSI Client Sample ID: Outfall 002 Lab ID: 2016-0956 Collection Date: 3/30/2016 11:28:00 AM Matrix: Water Analyses Oil and Grease EPA1664 Batch: 16040408 Run: 1 Result Reporting Limit MDL Qual Unit Oil and Grease <2.5 2.5 2.5 mg/l Robert Graddy Analysis Date/Time 3-31-2016 1515 Inspection Report Page 18 of 32

Client: CSI Client Sample ID: Outfall 004 Lab ID: 2016-0957 Collection Date: 3/30/2016 11:00:00 AM Matrix: Water Analyses Oil and Grease EPA1664 Batch: 16040408 Run: 1 Result Reporting Limit MDL Qual Unit Oil and Grease <2.5 2.5 2.5 mg/l Robert Graddy Analysis Date/Time 3-31-2016 1515 Inspection Report Page 19 of 32

Analytical Quality Control Results Report Batch: 16033105 Fecal Coliforms - water Outfall 002 LIMS ID: 2016-0956 Fecal Coliforms DUP Run: 1 Fecal Coliforms <4 cfu/100ml 4 4 Fecal Coliforms (RPD) 0 % 0-20 Analysis Date/Time 3/30/2016 16:12 Melanie Treat Inspection Report Page 20 of 32

Analytical Quality Control Results Report Batch: 16040408 Oil and Grease - water Outfall 002 LIMS ID: 2016-0956 Oil and Grease - water DUP Run: 1 Oil and Grease <2.5 mg/l 2.5 2.5 Oil and Grease (RPD) 0 % 0-20 Robert Graddy Analysis Date/Time 3-31-2016 1515 Outfall 002 LIMS ID: 2016-0956 Oil and Grease - water MS Run: 1 Oil and Grease (% Recovery) 97.0 % 70-130 Robert Graddy Analysis Date/Time 3-31-2016 1515 Outfall 002 LIMS ID: 2016-0956 Oil and Grease - water MSD Run: 1 Oil and Grease (% Recovery) 102 % 70-130 Oil and Grease (RPD) 5.5 % 0-20 Robert Graddy Analysis Date/Time 3-31-2016 1515 MB LIMS ID: 16040408-MB-01 Oil and Grease - water MB Run: 1 Oil and Grease <2.5 mg/l 2.5 2.5 Robert Graddy Analysis Date/Time 3-31-2016 1515 LCS LIMS ID: 16040408-LCS-01 Oil and Grease - water LCS Run: 1 Inspection Report Page 21 of 32

Oil and Grease (% Recovery) 87.2 % 70-130 Robert Graddy Analysis Date/Time 3-31-2016 1515 Inspection Report Page 22 of 32

Analytical Quality Control Results Report Batch: 16041201 ICP Metals - water (total) Outfall 004 LIMS ID: 2016-0957 ICP Metals - water (Total) DUP Run: 1 Aluminum (RPD) 3.2 % 0-20 Aluminum 44.4 ug/l 20 20 Antimony 43.1 ug/l 5 10 Antimony (RPD) 1.2 % 0-20 Arsenic (RPD) 3.1 % 0-20 Arsenic 5.72 ug/l 0.5 1 Barium 52.0 ug/l 2 10 Barium (RPD) 0.1 % 0-20 Beryllium (RPD) 0 % 0-20 Beryllium <0.5 ug/l 0.1 0.5 Boron 82.8 ug/l 5 25 Boron (RPD) 0.9 % 0-20 Cadmium (RPD) 17.0 % 0-20 Cadmium <1 ug/l 0.3 1 Chromium 1.10 ug/l 0.3 1 Chromium (RPD) 0.5 % 0-20 Cobalt (RPD) 13.5 % 0-20 Cobalt <1 ug/l 0.5 1 Copper 4.43 ug/l 0.5 1 Copper (RPD) 1.3 % 0-20 Iron (RPD) 5.1 % 0-20 Iron 248 ug/l 10 20 Lead <1 ug/l 0.1 1 Lead (RPD) 12.0 % 0-20 Magnesium (RPD) 0.2 % 0-20 Magnesium 3.69 mg/l 0.1 0.1 Manganese 50 ug/l 0.2 1 Manganese (RPD) 0.4 % 0-20 Nickel (RPD) 0.3 % 0-20 Nickel 5.8 ug/l 0.5 2.5 Potassium 12.4 mg/l 0.05 1 Potassium (RPD) 0.5 % 0-20 Selenium (RPD) 7.5 % 0-20 Selenium <2 ug/l 0.5 2 Silver <5 ug/l 1 5 Silver (RPD) 88.0 % 0-20 Sodium (RPD) 0.2 % 0-20 Sodium 68.5 mg/l 0.02 0.04 Thallium <2.5 ug/l 0.05 2.5 Inspection Report Page 23 of 32

Thallium (RPD) 42.9 % 0-20 Vanadium (RPD) 2.3 % 0-20 Vanadium <2.5 ug/l 1 2.5 Zinc 23.1 ug/l 2 3 Zinc (RPD) 0.3 % 0-20 Robert Graddy Analysis Date/Time Apr 8 2016 10:40AM Outfall 004 LIMS ID: 2016-0957 ICP Metals - water (Total) DUP Run: 2 Calcium (RPD) 5.1 % 0-20 Calcium 175 mg/l 0.4 0.4 0 Robert Graddy Analysis Date/Time Apr 8 2016 11:32AM MB LIMS ID: 16041201-MB-01 ICP Metals - water (Total) MB Run: 1 Aluminum <20 ug/l 20 20 Antimony <10 ug/l 5 10 Arsenic <1 ug/l 0.5 1 Barium <10 ug/l 2 10 Beryllium <0.5 ug/l 0.1 0.5 Boron <25 ug/l 5 25 Cadmium <1 ug/l 0.3 1 Calcium <0.04 mg/l 0.04 0.04 Chromium <1 ug/l 0.3 1 Cobalt <1 ug/l 0.5 1 Copper <1 ug/l 0.5 1 Iron <20 ug/l 10 20 Lead <1 ug/l 0.1 1 Magnesium <0.1 mg/l 0.1 0.1 Manganese <1 ug/l 0.2 1 Nickel <2.5 ug/l 0.5 2.5 Potassium <1 mg/l 0.05 1 Selenium <2 ug/l 0.5 2 Silver <5 ug/l 1 5 Sodium <0.04 mg/l 0.02 0.04 Thallium <2.5 ug/l 0.05 2.5 Inspection Report Page 24 of 32

Vanadium <2.5 ug/l 1 2.5 Zinc <3 ug/l 2 3 Robert Graddy Analysis Date/Time Apr 8 2016 9:40AM LCS LIMS ID: 16041201-LCS-01 ICP Metals - water (Total) LCS Run: 1 Aluminum (% Recovery) 117 % 70-130 Antimony (% Recovery) 102 % 70-130 Arsenic (% Recovery) 107 % 70-130 Barium (% Recovery) 99.1 % 70-130 Beryllium (% Recovery) 106 % 70-130 Boron (% Recovery) 106 % 70-130 Cadmium (% Recovery) 104 % 70-130 Calcium (% Recovery) 104 % 70-130 Chromium (% Recovery) 98.3 % 70-130 Cobalt (% Recovery) 98.6 % 70-130 Copper (% Recovery) 100 % 70-130 Iron (% Recovery) 99.9 % 70-130 Lead (% Recovery) 98.3 % 70-130 Magnesium (% Recovery) 100 % 70-130 Manganese (% Recovery) 100 % 70-130 Nickel (% Recovery) 100 % 70-130 Potassium (% Recovery) 103 % 70-130 Selenium (% Recovery) 115 % 70-130 Silver (% Recovery) 99.0 % 70-130 Sodium (% Recovery) 99.6 % 70-130 Thallium (% Recovery) 97.6 % 70-130 Vanadium (% Recovery) 98.0 % 70-130 Zinc (% Recovery) 110 % 70-130 Robert Graddy Analysis Date/Time Apr 8 2016 10:10AM Inspection Report Page 25 of 32

Analytical Quality Control Results Report Batch: 16041801 CBOD5 - water Outfall 002 LIMS ID: 2016-0956 CBOD - water DUP Run: 1 Carbonaceous BOD 3.75 mg/l 0.2 0.2 Carbonaceous BOD (RPD) >20 % 0-20 Robert Graddy Analysis Date/Time 3/30/2016 12:40 MB LIMS ID: 16041801-MB-01 CBOD - water MB Run: 1 Carbonaceous BOD <0.2 mg/l 0.2 0.2 Robert Graddy Analysis Date/Time 3/30/2016 12:40 LCS LIMS ID: 16041801-LCS-01 CBOD - water LCS Run: 1 Carbonaceous BOD (% Recovery) 109 % 80-120 Robert Graddy Analysis Date/Time 3/30/2016 12:40 LCS LIMS ID: 16041801-LCS-02 CBOD - water LCS Run: 1 Carbonaceous BOD (% Recovery) 102 % 80-120 Robert Graddy Analysis Date/Time 3/30/2016 12:40 Inspection Report Page 26 of 32

Analytical Quality Control Results Report Batch: 16041206 TSS - water Outfall 002 LIMS ID: 2016-0956 Solids, Total Suspended - water DUP Run: 1 Total Suspended Solids 5.0 mg/l 1 1 Total Suspended Solids (RPD) 13.1 % 0-20 Analysis Date/Time 3/24/2016 7:30 MB LIMS ID: 16041206-MB-01 Solids, Total Suspended - water MB Run: 1 Total Suspended Solids <1 mg/l 1 1 Analysis Date/Time 3/24/2016 7:30 LCS LIMS ID: 16041206-LCS-01 Solids, Total Suspended - water LCS Run: 1 Total Suspended Solids (% Recovery) 104 % 90-110 Analysis Date/Time 3/24/2016 7:30 MB LIMS ID: 16041206-MB-02 Solids, Total Suspended - water MB Run: 1 Total Suspended Solids <1 mg/l 1 1 Analysis Date/Time 3/24/2016 7:30 LCS LIMS ID: 16041206-LCS-02 Solids, Total Suspended - water LCS Run: 1 Total Suspended Solids (% Recovery) 105 % 90-110 Analysis Date/Time 3/24/2016 7:30 MB LIMS ID: 16041206-MB-03 Inspection Report Page 27 of 32

Solids, Total Suspended - water MB Run: 1 Total Suspended Solids <1 mg/l 1 1 Analysis Date/Time 3/24/2016 7:30 LCS LIMS ID: 16041206-LCS-03 Solids, Total Suspended - water LCS Run: 1 Total Suspended Solids (% Recovery) 91.0 % 90-110 Analysis Date/Time 3/24/2016 7:30 MB LIMS ID: 16041206-MB-04 Solids, Total Suspended - water MB Run: 1 Total Suspended Solids <1 mg/l 1 1 Analysis Date/Time 3/24/2016 7:30 LCS LIMS ID: 16041206-LCS-04 Solids, Total Suspended - water LCS Run: 1 Total Suspended Solids (% Recovery) 97.2 % 90-110 Analysis Date/Time 3/24/2016 7:30 MB LIMS ID: 16041206-MB-05 Solids, Total Suspended - water MB Run: 1 Total Suspended Solids <1 mg/l 1 1 Analysis Date/Time 4/6/2016 7:30 LCS LIMS ID: 16041206-LCS-05 Solids, Total Suspended - water LCS Run: 1 Total Suspended Solids (% Recovery) 94.0 % 90-110 Inspection Report Page 28 of 32

Analysis Date/Time 4/6/2016 7:30 MB LIMS ID: 16041206-MB-06 Solids, Total Suspended - water MB Run: 1 Total Suspended Solids <1 mg/l 1 1 Analysis Date/Time 4/6/2016 7:30 LCS LIMS ID: 16041206-LCS-06 Solids, Total Suspended - water LCS Run: 1 Total Suspended Solids (% Recovery) 98.5 % 90-110 Analysis Date/Time 4/6/2016 7:30 MB LIMS ID: 16041206-MB-07 Solids, Total Suspended - water MB Run: 1 Total Suspended Solids <1 mg/l 1 1 Analysis Date/Time 4/6/2016 7:30 LCS LIMS ID: 16041206-LCS-07 Solids, Total Suspended - water LCS Run: 1 Total Suspended Solids (% Recovery) 96.2 % 90-110 Analysis Date/Time 4/6/2016 7:30 MB LIMS ID: 16041206-MB-08 Solids, Total Suspended - water MB Run: 1 Total Suspended Solids <1 mg/l 1 1 Analysis Date/Time 4/6/2016 7:30 LCS LIMS ID: 16041206-LCS-08 Solids, Total Suspended - water LCS Run: 1 Inspection Report Page 29 of 32

Total Suspended Solids (% Recovery) 96.8 % 90-110 Analysis Date/Time 4/6/2016 7:30 Inspection Report Page 30 of 32

Analytical Quality Control Results Report Batch: 16040401 Lachat - Ammonia (water) Outfall 002 LIMS ID: 2016-0956 Ammonia as N - water DUP Run: 1 Ammonia as N <0.03 mg/l 0.03 0.03 Ammonia as N (RPD) 29.6 % 0-20 Chad Carrington Analysis Date/Time 3/30/2016 4:14:14 PM MB LIMS ID: 16040401-MB-01 Ammonia as N - water MB Run: 1 Ammonia as N <0.03 mg/l 0.03 0.03 Chad Carrington Analysis Date/Time 3/30/2016 1:40:05 PM LCS LIMS ID: 16040401-LCS-01 Ammonia as N - water LCS Run: 1 Ammonia as N (% Recovery) 96.7 % 80-120 Chad Carrington Analysis Date/Time 3/30/2016 1:41:07 PM MB LIMS ID: 16040401-MB-02 Ammonia as N - water MB Run: 1 Ammonia as N <0.03 mg/l 0.03 0.03 Chad Carrington Analysis Date/Time 3/30/2016 2:11:18 PM LCS LIMS ID: 16040401-LCS-02 Ammonia as N - water LCS Run: 1 Inspection Report Page 31 of 32

Ammonia as N (% Recovery) 98.0 % 80-120 Chad Carrington Analysis Date/Time 3/30/2016 2:12:20 PM MB LIMS ID: 16040401-MB-03 Ammonia as N - water MB Run: 1 Ammonia as N <0.03 mg/l 0.03 0.03 Chad Carrington Analysis Date/Time 3/30/2016 3:07:33 PM LCS LIMS ID: 16040401-LCS-03 Ammonia as N - water LCS Run: 1 Ammonia as N (% Recovery) 97.5 % 80-120 Chad Carrington Analysis Date/Time 3/30/2016 3:08:35 PM MB LIMS ID: 16040401-MB-04 Ammonia as N - water MB Run: 1 Ammonia as N <0.03 mg/l 0.03 0.03 Chad Carrington Analysis Date/Time 3/30/2016 3:39:50 PM LCS LIMS ID: 16040401-LCS-04 Ammonia as N - water LCS Run: 1 Ammonia as N (% Recovery) 100 % 80-120 Chad Carrington Analysis Date/Time 3/30/2016 3:40:54 PM Inspection Report Page 32 of 32