Semiannual Maintenance and Calibration Report Prepared by Air Resource Specialists, Inc.

Semiannual Maintenance and Calibration Report Prepared by Air Resource Specialists, Inc. Client: National Park Service Field Personnel: Jake Zaragoza Site: Big Bend NP (BIBE-KB) Service Date(s): 2/21/217 to 2/22/217 Site Operator: Lydia Smith Subject: Semiannual Visit All site visit and calibration forms are attached, detailing the pre- and post-maintenance calibrations and test results. Calibration acceptance criteria are defined as the thresholds at which corrective action is required. Data acceptance criteria are defined as the thresholds at which the quality of the ambient data is questionable and may require invalidation. This report is not complete without the inclusion of the calibration form worksheets. SUMMARY OF FINDINGS GASEOUS POLLUTANT SUPPORT EQUIPMENT Zero-Air System (Werther / Panther Compressor PC7/4E): Maintenance - No maintenance for the pump or compressor was required at this time. The media for the zero-air system was replaced. Station Temperature: QAM style temperature sensor Pre-Maintenance Testing - The sensor was compared against a certified temperature transfer standard. The sensor was found to be responding within calibration acceptance criteria. Maintenance - No maintenance was performed. Post-Maintenance Testing - The sensor was compared against a certified temperature transfer standard. The sensor was found to be responding within calibration acceptance criteria. GASEOUS POLLUTANT ANALYZERS Ozone Analyzer (Thermo 49c): Pre-Maintenance Testing - The ozone analyzer was compared against a Level 2 ozone transfer standard. The ozone analyzer was found to be responding within calibration acceptance criteria. Maintenance - Cleaned fan and cells for analyzer. Analog output was adjusted. The lamp setting on the analyzer was increased to 49% and the span on the analyzer was calibrated. The fan was cleaned before the analog out and line loss test. Post-Maintenance Testing - The ozone analyzer was compared against a Level 2 ozone transfer standard. The ozone analyzer was found to be responding within calibration acceptance criteria.

Ozone Station Reference (Thermo 49c): Pre-Maintenance Testing - The Level 3 ozone station reference was recertified using a Level 2 ozone transfer standard. The ozone station reference was found to be responding within calibration acceptance criteria. Maintenance - Cleaned fan and cells of the station reference. Analog output was adjusted. The lamp setting on the station reference was increased to 5%. The logger correction factors were updated. The fan and cells were cleaned before the analog out and line loss test. Post-Maintenance Testing - The ozone station reference was compared against a Level 2 ozone transfer standard. The ozone station reference was found to be responding within calibration acceptance criteria. METEOROLOGICAL SENSORS Ambient Temperature (Climatronics 193): Pre-Maintenance Testing - The sensor was compared against a certified temperature transfer standard in three water baths controlled at temperatures between and 5 degrees Celsius. The sensor was confirmed to be responding within calibration acceptance criteria. The aspirator fan was functioning correctly. Maintenance - No maintenance was performed. Relative Humidity (Rotronic MP61): Pre-Maintenance Testing - The sensor was collocated with a certified relative humidity transfer standard. The sensor was confirmed to be responding within calibration acceptance criteria. The aspirator fan was functioning correctly. Maintenance - The sensor was replaced with a recently serviced Rotronic MP61A. Post-Maintenance Testing - The sensor was collocated with a certified relative humidity transfer standard. The sensor was confirmed to be responding within calibration acceptance criteria. Wind Speed (Climatronics 175): Pre-Maintenance Testing - The sensor was challenged with a certified anemometer drive. The sensor was confirmed to be responding within calibration acceptance criteria. The starting threshold test for the sensor was within acceptance criteria. Maintenance - The sensor was replaced with a recently serviced Climatronics wind speed sensor. Post-Maintenance Testing - The sensor was challenged with a certified anemometer drive. The sensor was confirmed to be responding within calibration acceptance criteria. The starting threshold test for the sensor was within acceptance criteria. Wind Direction (Climatronics 176): Pre-Maintenance Testing - The reference alignment for the sensor was checked using a compass. The reference alignment for the sensor was confirmed to be within acceptable limits. The accuracy of the sensor was tested by comparison to a reference. The sensor was confirmed to be responding within calibration acceptance criteria. The linearity of the sensor was within acceptable limits. The starting threshold test results were outside of acceptance criteria. Maintenance - The sensor was replaced with a recently serviced Climatronics wind direction sensor.

Post-Maintenance Testing - The reference alignment for the sensor was checked using a compass. The reference alignment for the sensor was confirmed to be within acceptable limits. The accuracy of the sensor was tested by comparison to a reference. The sensor was confirmed to be responding within calibration acceptance criteria. The linearity of the sensor was within acceptable limits. The starting threshold test for the sensor was within acceptance criteria. Solar Radiation (Li-Cor Pyranometer): Pre-Maintenance Testing - The sensor was collocated with a certified solar radiation transfer standard. The sensor was confirmed to be responding within calibration acceptance criteria. The sensor was found to be level and clean. Maintenance - The transfer standard could not be collocated immediately next to the site sensor, but was placed on a tripod instead. Post-Maintenance Testing - No post-maintenance checks were performed. The sensor was confirmed to be responding within calibration acceptance criteria. Precipitation (Climatronics 158): Pre-Maintenance Testing - The sensor was challenged using a known volume of water. The sensor was found responding within calibration acceptance criteria. The sensor was found to be level, but was not clean. The functionality of the heater was not assessed. Maintenance - The level was adjusted very slightly. Post-Maintenance Testing - The sensor was challenged using a known volume of water. The sensor was confirmed to be responding within calibration acceptance criteria. PARTICULATE MONITORS AND SAMPLERS CASTNET Filter Pack Flow: Pre-Maintenance Testing - A leak check on the system was performed and results were within acceptable limits. The flow was checked using a certified flow standard measuring flow in standard conditions. The measured flow was found to be outside of calibration acceptance criteria. Maintenance - The MFC was unable to control the flow. The flow box was swapped with a new style Alicat/Teflon filter box. The As left data was used to calculate new high/low output scaling factors. Post-Maintenance Testing - The flow was checked using a certified flow standard measuring flow in standard conditions. The measured flow was confirmed to be within calibration acceptance criteria. ADDITIONAL COMMENTS Lydia serves as the site operator and was able to meet with me during the visit. Lydia does a good job of keeping the site operational and accurate.

SITE INFORMATION ABBR. BIBE-KB CLIENT SITE NAME National Park Service FIELD SPECIALIST Big Bend National Park - K-Bar Ranch Road Jake Zaragoza DATE DATE OF LAST VISIT 2/21/217 7/12/216 LATITUDE North Deg Min LONGITUDE West 13 1 Sec 29 18 8 38 --CALCULATE-> Decimal 29.322 13.1772 Decimal Deg Min Sec --CALCULATE-> ELEVATION Meters Feet --CALCULATE-> 156 3465 Feet --CALCULATE-> Meters Photo Documentation Completed? Yes No N/A Cellular Phone Coverage Cellular Phone Coverage Protocol? Carrier? # of Bars? Signal Strength? 1X Verizon 3 -X dbm -X dbm DAY TIME IN TIME OUT 2/21/217 9:3 8:3 2/22/217 9:3 4:3 SITE STANDARDS PM Flow Reference Please verify site standards used by the site operator MANUFACTURER MODEL SERIAL # Calibration Expiration Date NOTES:

TEMPERATURE / VERTICAL TEMPERATURE DIFFERENCE SYSTEM VERIFICATION & CALIBRATION ABBR. BIBE-KB CLIENT National Park Service FIELD SPECIALIST Jake Zaragoza DATE 2/21/217 SITE NAME Big Bend National Park - K-Bar Ranch Road DATE OF LAST VISIT 7/12/216 MANUFACTURER MODEL Temperature Reference Eutechnics 44 SERIAL NUMBER 342 EXPIRATION DATE 1/3/218 2m Temperature Sensor Manufacturer Climatronics 193 Serial Number EPA149 List sensors according to height on tower, from highest to lowest. Manufacturer Serial Number Climatronics 193 EPA149 Temp. Deltas DATA ACCEPTANCE CRITERIA (<=) Ambient Temperature Difference ( o C) Vertical Temperature Difference ( o C) 1. N/A 2m Temperature Bath Temp ( o C) DAS Difference.55.58.3 26.14 26.8 -.6 47.96 47.9 -.6 MAX ABS Difference.6 MAX ABS Difference Aspirator fan functional 2m? Yes No N/A Yes No N/A Yes No N/A Yes No N/A Each sensor was verified against its data channel? Yes No N/A Each Temperature Difference = Upper - Lower? Yes No N/A Bath Temp ( o C) MAX ABS Difference MAX ABS Difference NOTES: No maintenance performed.

ABBR. BIBE-KB CLIENT SITE NAME National Park Service FIELD SPECIALIST Big Bend National Park - K-Bar Ranch Road STATION TEMPERATURE SENSOR VERIFICATION & CALIBRATION Jake Zaragoza DATE DATE OF LAST VISIT 2/21/217 7/12/216 Temperature Reference MANUFACTURER MODEL SERIAL NUMBER Eutechnics 44 342 EXPIRATION DATE 1/3/218 CALIBRATION ACCEPTANCE CRITERIA (<=) Temperature Difference ( o C) 1. Temperature Temperature Reference ( o C) DAS ( o C) Difference Reference ( o C) DAS ( o C) Difference 23.7 23.18.1 24.78 24.15 -.6 23.37 23.41. 24.74 24.2 -.7 NOTES: No maintenance was performed.

ABBR. BIBE-KB CLIENT SITE NAME RELATIVE HUMIDITY SENSOR VERIFICATION & CALIBRATION National Park Service FIELD SPECIALIST Big Bend National Park - K-Bar Ranch Road Jake Zaragoza DATE DATE OF LAST VISIT 2/21/217 7/12/216 RH SENSOR REFERENCE MANUFACTURER Rotronic MODEL HG2S3 SERIAL NUMBER 239853 EXPIRATION DATE 8/5/217 Manufacturer Serial Number Rotronic MP61 5268 Manufacturer Serial Number Rotronic MP61A 67855 FIELD CALIBRATION ACCEPT. CRITERIA (<=) Relative Humidity Difference (%) 5% Hour 12 13 14 15 16 Relative Humidity (%) Relative Humidity (%) STD DAS Difference V Hour STD DAS Difference 23.6% 26.2% 2.7% 8 34.2% 35.3% 1.1% 22.6% 25.1% 2.6% 9 24.6% 26.9% 2.3% 19.2% 21.8% 2.7% 1 18.2% 21.1% 2.9% 15.8% 18.2% 2.5% 11 15.9% 18.5% 2.6% 14.4% 16.6% 2.2% 12 14.8% 17.1% 2.3% Average 2.5% Average 2.2% V Aspirator fan functional? Yes No N/A NOTES:

WIND SPEED SENSOR VERIFICATION & CALIBRATION ABBR. BIBE-KB CLIENT SITE NAME National Park Service FIELD SPECIALIST Big Bend National Park - K-Bar Ranch Road Jake Zaragoza DATE 2/21/217 DATE OF LAST VISIT 7/12/216 MANUFACTURER MODEL SERIAL NUMBER EXPIRATION DATE Wind Speed Reference RM Young 1882A/1883A CA2241 1/26/218 Wind Speed Torque Gauge RM Young 1831 NA Manufacturer and Climatronics - 175 / Manufacturer and Climatronics - 175 / Heavy Duty Aluminum Heavy Duty Aluminum Sensor Serial # 4559 Sensor Serial # 1697 Cups Serial # 1967 Cups Serial # 1967 DATA ACCEPTANCE CRITERIA (<=) Wind Speed Difference (m/s).25 Wind Speed Difference (%) Wind Speed Threshold (m/s vs % Diff.) 5.% 5. if wind speed <= 5 m/s if wind speed > 2 m/s 2. Select UNITS m/s Motor Speed (rpm) Target Speed. 3 7.274 6 14.325 9 21.375 12 28.426 18 42.527 Wind Speed DAS Difference.231 N/A N/A N/A 7.27 -.1% 14.3 -.2% 21.3 -.4% 28.4 -.1% 42.5 -.1% Starting Threshold Torque <=.3 g-cm TORQUE.1 NO ACTION REQUIRED Heater sleeve functional? Yes No N/A Wind Speed Motor Speed (rpm) Target Speed DAS Difference..238 N/A N/A N/A 3 7.274 7.255 -.3% 6 14.325 14.27 -.4% 9 21.375 21.28 -.4% 12 28.426 28.3 -.4% 18 42.527 42.34 -.4% Starting Threshold Torque <=.3 g-cm TORQUE.1 NO ACTION REQUIRED NOTES:

WIND DIRECTION SENSOR VERIFICATION & CALIBRATION ABBR. BIBE-KB CLIENT National Park Service FIELD SPECIALIST Jake Zaragoza DATE 2/21/217 SITE NAME Big Bend National Park - K-Bar Ranch Road DATE OF LAST VISIT 7/12/216 Direction Alignment Reference Direction Linearity Reference Direction Torque Gauge MANUFACTURER MODEL SERIAL NUMBER Brunton Transit 54791146 ARS Jig 45 Degree Disc NA RM Young 1831 NA EXPIRATION DATE Manufacturer & Sensor Serial # Vane Serial # Climatronics - 176 Manufacturer & Climatronics - 176 1527? Sensor Serial # 222 3498 Vane Serial # 3498 Local Magnetic Declination (degrees) Method NOAA ACCEPTANCE CRITERIA (<=) 6.7 Cross-arm Alignment Error (degrees) (CAL) 2 Total Align. Diff (degrees) (DATA) 5 Sensor Linearity (degrees) (CAL) 5 Mag. Dec. from NOAA (deg/min/sec) http://www.ngdc.noaa.gov/geomag-web/#declination Landmarks From the North From the South From the East From the West. Degrees 18 9 27 Is the Reference Alignment intended to be N-S? YES Is the Reference Alignment intended to be N-S? YES Reference Alignment (degrees) 2. Reference Alignment (degrees) 2. SENSOR ALIGNMENT N-S Reference Degrees DAS From the North From the South 18 From the East 9 From the West 27 Total Alignment MAX ABS Diff OR Difference SENSOR ALIGNMENT N-S Reference Degrees DAS From the North From the South 18 From the East 9 From the West 27 Total Alignment MAX ABS Diff Difference SENSOR ALIGNMENT SENSOR ALIGNMENT Landmark Degrees DAS Difference Landmark Degrees DAS Difference From the North From the North From the South 18 From the South 18 From the East 9 From the East 9 From the West 27 From the West 27 Total Alignment MAX ABS Diff Total Alignment MAX ABS Diff OR SENSOR ALIGNMENT SENSOR ALIGNMENT X Reference Degrees DAS Difference X Reference Degrees DAS Difference 2 359. -3. Align with Ref (N) 2 36. -2. 182 18. -2. Align with Ref (S) 182 181. -1. 92 87.9-4.1 Perp with Ref (E) 92 449. -3. 272 275. 3. Perp with Ref (W) 272 273. 1. Total Alignment MAX ABS Diff 4.1 Total Alignment MAX ABS Diff 3. OR OR SENSOR LINEARITY Point DAS 1 18. 2 134. 3 87.7 4 42.3 5 358. 6 314. 7 268. 8 222. 1 177. MAX Difference Difference N/A -1-1 1 1-1 -1 1 SENSOR LINEARITY Point DAS Difference 1 153. N/A 2 18. 3 63.1 4 17.1-1 5 334. 2 6 288. -1 7 244. 1 8 199. 1 154. MAX Difference 2 NO ACTION REQUIRED NO ACTION REQUIRED Starting Threshold TORQUE Starting Threshold Torque <= 6. g-cm 7. Torque <= 6. g-cm ACTION REQUIRED TORQUE 4. NO ACTION REQUIRED Heater sleeve functional? Yes No N/A NOTES: No sensor S/N was found on the 'as found' sensor.

ABBR. BIBE-KB CLIENT SITE NAME National Park Service FIELD SPECIALIST Big Bend National Park - K-Bar Ranch Road SOLAR RADIATION SENSOR VERIFICATION & CALIBRATION Jake Zaragoza DATE DATE OF LAST VISIT 2/21/217 7/12/216 Solar Radiation Reference MANUFACTURER MODEL SERIAL NUMBER EXPIRATION DATE LiCor Li-2X-L PY84778 11/17/217 MULTIPLIER 2. Manufacturer Serial Number Translator Logger Type ESC LiCor Pyranometer PY92131 Climatronics 354 High Input (V) 5. Low Input (V). High Output 1396. Low Output. Manufacturer LiCor Pyranometer Serial Number PY92131 Translator Climatronics 354 Logger Type High Input (V) 5. ESC Low Input (V). High Output 1396. Low Output. CALIBRATION ACCEPTANCE CRITERIA (<=) Difference from CTS (%) 5% DATA ACCEPTANCE CRITERIA (<=) Difference from CTS (%) 1% Solar Radiation Hour CTS (W/m 2 ) DAS (W/m 2 ) Difference 12 755.1 775 2.6% 13 829 857 3.4% 14 832 865 4.% 15 77 83 4.3% V DARK RESPONSE DAS (W/m 2 ) 1 MEAN ABS % DIFF 3.6% Sensor found clean? Yes No Sensor found level? Yes No Solar Radiation Hour CTS (W/m 2 ) DAS (W/m 2 ) Difference V DARK RESPONSE DAS (W/m 2 ) MEAN ABS % DIFF NOTES:

PRECIPITATION SENSOR VERIFICATION & CALIBRATION ABBR. BIBE-KB CLIENT SITE NAME National Park Service FIELD SPECIALIST Big Bend National Park - K-Bar Ranch Road Jake Zaragoza DATE DATE OF LAST VISIT 2/21/217 7/12/216 MANUFACTURER MODEL SERIAL NUMBER Precipitation Reference Novalynx Drip Bottle NA EXPIRATION DATE Manufacturer Serial Number Climatronics Manufacturer 158 417 Serial Number Climatronics 158 417 CALIBRATION ACCEPTANCE CRITERIA (<=) Difference from Input Volume (%) 5% DATA ACCEPTANCE CRITERIA (<=) Difference from Input Volume (%) 1% X Reference Chart Input Volume (ml) Manufacturer Climatronics Climatronics 197-1-G-H 158 Diameter (in.) 8 9.66 mm/tip.254.1 ml/tip 8.24 4.73 Met One 37 8.254 8.24 Met One 385 12.254 18.53 RM Young 5222 6.2825.1 2. Texas Electronics TR-525I-HT 6.6.254 4.73 945 DAS target 29.14 19.99 29.14 12.95 47.25 5.78 Conversions Value Units Value 1. inch 25.4 25.4 mm 1. Units mm inch Reference (ml) Target (mm) 945 19.99 Precipitation DAS (mm) Difference 19.4-2.9% Heater functional? Yes No N/A Sensor found level? Yes No Sensor found clean? Yes No Precipitation Reference (ml) Target (mm) DAS (mm) Difference 945 19.99 19.6-2.% NOTES: Cleaned tipping bucket. Adjusted level slightly.

CASTNET FLOW SYSTEM VERIFICATION & CALIBRATION ABBR. BIBE-KB CLIENT SITE NAME National Park Service FIELD SPECIALIST Big Bend National Park - K-Bar Ranch Road Jake Zaragoza DATE DATE OF LAST VISIT 2/21/217 7/12/216 MFC High Flow Reference MANUFACTURER MODEL SERIAL NUMBER Bios Definer 22-H 122997 EXPIRATION DATE 1/9/217 MFC Manufacturer Serial Number Apex AX-MC-1SLPM-D-PCV65/5M 114831 MFC Manufacturer Serial Number Alicat MC-1SLPM-D-PCV65 134658 Pump Manufacturer Thomas 17CA18 Serial Number 6881784 Flow Target 3. ENTER FLOWS IN SLPM Pump Manufacturer Serial Number Thomas 17CA18 6881784 MFC Display Linear MFC VDC Linear Regression Regression Date 2/21/217 Setpoint Slope 2.988 Setpoint Slope Intercept Intercept ESC Logger Scaling High Input (V) Low Input (V) High Output (LPM) Low Output (LPM) 5.. 5.74 -.71 Operational Checks Vacuum DAS Flow MFC Flow Flow Standard Target 2..8.9.8 Flow Standard Rotometer MFC Display MFC Volts DC DAS Display Difference Value % Pump Off. SLPM..1.98.29 Leak Test. SLPM..3.25 -.46 1 2. SLPM.792.8.89.883.841.49 6.2% 2 (low) 2.5 SLPM.791.8.89.886.841.49 6.2% FAIL 3 (target) 3. SLPM.795.8.89.887.84.45 5.7% FAIL 4 (high) 3.5 SLPM.793.8.89.886.84.47 6.% FAIL 5 4. SLPM.792.8.89.885.841.49 6.2% MAX > 4. SLPM.791.8.89.887.843.52 6.5% Leak Test Results Flow (SLPM) -.7 *Note: A leak is present if the difference between the zero and leak test value is greater than.1 lpm Recalibration REQUIRED *Note: A calibration is required if the difference between the transfer standard and the DAS value is greater than +/- 2.% at the target setting or greater than +/- 2.5% at either the low or high point NEW CALIBRATION FACTORS MFC Display Linear MFC VDC Linear Regression Regression ESC Logger Scaling Setpoint Slope Intercept 8.271.299.526 Setpoint Slope Intercept 4.527.66.256 High Input (V) Low Input (V) High Output (LPM) 5.. 3.287 Correlation.281 Correlation.629 Low Output (LPM).256 Target Flow Standard Rotometer MFC Display MFC Volts DC DAS Display Difference Value % Pump Off. SLPM...4 -.1 Leak Test. SLPM...4. 1 2. SLPM 1.994 2.2 2. 1.997 2.32.38 1.9% 2 (low) 2.5 SLPM 2.491 2.8 2.5 2.5 2.541.5 2.% 3 (target) 3. SLPM 2.992 3.4 3. 2.999 3.48.56 1.9% 4 (high) 3.5 SLPM 3.493 3.9 3.5 3.499 3.555.63 1.8% 5 4. SLPM 4.3 4.5 4. 4. 4.69.66 1.7% MAX > 4. SLPM 4.511 5. 4.5 4.511 4.558.47 1.1% Leak Test Results Flow (SLPM). *Note: A leak is present if the difference between the zero and leak test value is greater than.1 lpm Operational Checks Vacuum 2. DAS Flow 3. MFC Flow 3. Flow Standard 3. NOTES: As found with old box. Unable to solve flow issue onsite. At one point I had only the pump connected, all else disconnected, and the flow still could not be adjusted. Rebuilt pump and swapped the box. The 'as left' was with the new box, it was used to get new logger values. They are on the 2nd excel sheet.

CASTNET FLOW SYSTEM VERIFICATION & CALIBRATION ABBR. BIBE-KB CLIENT National Park Service FIELD SPECIALIST Jake Zaragoza DATE 2/21/217 SITE NAME Big Bend National Park - K-Bar Ranch Road DATE OF LAST VISIT 7/12/216 MANUFACTURER MODEL SERIAL NUMBER EXPIRATION DATE MFC High Flow Reference Bios Definer 22-H 122997 1/9/217 MFC MFC Manufacturer Alicat Manufacturer Alicat MC-1SLPM-D-PCV65 MC-1SLPM-D-PCV65 Serial Number 134658 Serial Number 134658 Pump Pump Manufacturer Thomas Manufacturer Thomas 17CA18 17CA18 ENTER Serial Number 6881784 Serial Number 6881784 FLOWS IN Flow Target 3. SLPM MFC Display Linear MFC VDC Linear Regression Regression ESC Logger Scaling Date 2/21/217 High Input (V) 5. Setpoint 3. Setpoint Low Input (V). Slope Slope High Output (LPM) 5.85 Intercept Intercept Low Output (LPM) -.4 Operational Checks Vacuum 2. DAS Flow 3. MFC Flow 3. Flow Standard 3. Target Flow Standard Rotometer MFC Display MFC Volts DC DAS Display Difference Value % Pump Off. SLPM...4 -.1 Leak Test. SLPM...4. 1 2. SLPM 1.994 2.2 2. 1.997 2.32.38 1.9% 2 (low) 2.5 SLPM 2.491 2.8 2.5 2.5 2.541.5 2.% 3 (target) 3. SLPM 2.992 3.4 3. 2.999 3.48.56 1.9% 4 (high) 3.5 SLPM 3.493 3.9 3.5 3.499 3.555.63 1.8% 5 4. SLPM 4.3 4.5 4. 4. 4.69.66 1.7% MAX > 4. SLPM 4.511 5. 4.5 4.511 4.558.47 1.1% Leak Test Results Flow (SLPM). *Note: A leak is present if the difference between the zero and leak test value is greater than.1 lpm Recalibration Not Required *Note: A calibration is required if the difference between the transfer standard and the DAS value is greater than +/- 2.% at the target setting or greater than +/- 2.5% at either the low or high point NEW CALIBRATION FACTORS MFC Display Linear MFC VDC Linear Regression Regression ESC Logger Scaling Setpoint 3.6 Setpoint 3.5 High Input (V) 5. Slope 1.4 Slope 1.3 Low Input (V). Intercept -.17 Intercept -.13 High Output (LPM) 5.1 Correlation 1. Correlation 1. Low Output (LPM) -.13 Target Flow Standard Rotometer MFC Display MFC Volts DC DAS Display Difference Value % Pump Off. SLPM. -.1.3 -.1 Leak Test. SLPM...4 -.1 1 2. SLPM 2.1 2.2 2. 1.998 1.993 -.8 -.4% 2 (low) 2.5 SLPM 2.497 2.8 2.5 2.496 2.495 -.2 -.1% 3 (target) 3. SLPM 2.994 3.4 3. 2.996 2.99 -.4 -.1% 4 (high) 3.5 SLPM 3.497 3.9 35. 3.498 3.496 -.1.% 5 4. SLPM 4.2 4.5 4. 4.2 3.99 -.12 -.3% MAX > 4. SLPM 4.511 5.1 4.5 4.55 4.56 -.5 -.1% Leak Test Results Flow (SLPM).1 *Note: A leak is present if the difference between the zero and leak test value is greater than.1 lpm Operational Checks Vacuum DAS Flow 3. MFC Flow 3. Flow Standard 3. NOTES: The 'as left' from the previous sheet was used as the 'as found' here to get new logger values. The 'as found' logger values were listed on the new box.

OZONE ANALYZER VERIFICATION & CALIBRATION () ABBR. BIBE-KB CLIENT National Park Service FIELD SPECIALIST Jake Zaragoza DATE 2/21/217 SITE NAME Big Bend National Park - K-Bar Ranch Road DATE OF LAST VISIT 7/12/216 Logger Slope Correction.9952 Logger Intercept Correction -.4475 CALIBRATION ACCEPTANCE CRITERIA (<=) TRANSFER STANDARD AMBIENT ANALYZER STATION REFERENCE Mean Absolute Difference (%) 3% Manufacturer Thermo Manufacturer Thermo Manufacturer Thermo Maximum Absolute Difference (%) 3% Linearity % of Fullscale 1% 49i 49c 49c DATA ACCEPTANCE CRITERIA (<=) Serial Number 11345196 Serial Number 58468-318 Serial Number 5212325 Mean Absolute Difference (%) 1% Coefficient 1. Coefficient 1.12 Coefficient 1. Maximum Absolute Difference (%) 1% Background. Background.2 Background. Linearity % of Fullscale 2% Cell A Intensity (Hz) 9326 Cell A Intensity (Hz) 7973 Cell A Intensity (Hz) 88725 SLOPE INT Cell B Intensity (Hz) 78154 Cell B Intensity (Hz) 6396 Cell B Intensity (Hz) 8355 Transfer Standard Correction Factors Flow A (lpm).789 Flow A (lpm).658 Flow A (lpm).664 Flow B (lpm).815 Flow B (lpm).682 Flow B (lpm).673 Full Scale (ppb) 25 Pressure (mmhg) 693.3 Pressure (mmhg) 655.8 Pressure (mmhg) 69.9 Linear Regression Plot Bench Temp ( C) 34.3 Bench Temp ( C) 37.2 Bench Temp ( C) 38.2 Bench Lamp Temp ( C) 54.2 Bench Lamp Temp ( C) 56.4 Bench Lamp Temp ( C) 56.7 Ozone Lamp Temp ( C) 68.2 Ozone Lamp Temp ( C) 71.2 Ozone Lamp Temp ( C) NA Ozone Source Yes Ozone Source No Transfer Standard Level LEVEL 2 Transfer Standard Level LEVEL 3 O3 LAMP TRANSFER STANDARD AMBIENT ANALYZER STATION REFERENCE POINT TARGET % or mv Display Corrected DAS Diff %Diff Linearity % DAS Diff %Diff Linearity % ZERO -.1.2. -.2 N/A.1%. -.2 N/A.% 1 225 47.4 21 213.2 214..8.4%.5% 217. 3.8 1.8% -.3% 2 15 44.1 175 177.7 18. 2.3 1.3% -.2% 178..3.2%.9% 3 1 38.3 115 116.9 12. 3.1 2.7% -.8% 121. 4.1 3.5% -1.% ACTION 4 8 34.2 76 77.4 78..6.8%.% 78..6.8%.1% 5 6 31.6 57 58.1 58. -.1 -.2%.3% 58. -.1 -.2%.3% ZERO.3. -.3 N/A.1%. -.3 N/A.% Mean ABS % Diff 1.1% Mean ABS % Diff 1.3% Max ABS % Difference 2.7% Max ABS % Difference 3.5% ACTION Analog Test Analyzer DAS Reference DAS Slope 1.1 Slope 1.16 Zero Full Scale -.1.9993 Line Loss Test Analyzer Display Span (site tubing) 26 Span (bypass tubing) 27 -.8.9995 % P/F -.5% Y-Intercept -.6 Y-Intercept -.26 Correlation.9999 Correlation.9999 Residuals Plot.9867 -.3264 1 2 3 y = 1.94x +.89 Transfer Standard (ppb) R² =.9998 NOTES: Replaced zero air media. Cleaned fans and L3 cells before analog test and line loss test. Cleaned analyzer cells post analog and line loss test. Adjusted analog out for both L3 and analyzer. Increased lamp setting on analyzer to 49%. Increased lamp setting to 5.3% on L3. Lamps for both instruments may need replacing during next SAM. Updated logger correction factors. Calibrated analyzer. Residual (ppb) Analyzer DAS (ppb) 5 4 3 2 1 15 1 5-5 -1-15 5 1 15 2 25 Regression Concentration Value (ppb)

ABBR. BIBE-KB CLIENT National Park Service FIELD SPECIALIST Jake Zaragoza DATE 2/21/217 SITE NAME Big Bend National Park - K-Bar Ranch Road DATE OF LAST VISIT 7/12/216 Logger Intercept Correction -.5438 CALIBRATION ACCEPTANCE CRITERIA (<=) TRANSFER STANDARD AMBIENT ANALYZER STATION REFERENCE Mean Absolute Difference (%) 3% Manufacturer Thermo Manufacturer Thermo Manufacturer Thermo Maximum Absolute Difference (%) 3% Linearity % of Fullscale 1% 49i 49c 49c DATA ACCEPTANCE CRITERIA (<=) Serial Number 11345196 Serial Number 58468-318 Serial Number 5212325 Mean Absolute Difference (%) 1% Coefficient 1. Coefficient 1.26 Coefficient 1. Maximum Absolute Difference (%) 1% Background. Background.2 Background. Linearity % of Fullscale 2% Cell A Intensity (Hz) 9315 Cell A Intensity (Hz) 11266 Cell A Intensity (Hz) 172 Cell B Intensity (Hz) 77854 Cell B Intensity (Hz) 9476 Cell B Intensity (Hz) 89585 Transfer Standard Correction Factors.9867 Flow A (lpm).789 Flow A (lpm).658 Flow A (lpm).664 Flow B (lpm).813 Flow B (lpm).688 Flow B (lpm).677 Full Scale (ppb) 5 Pressure (mmhg) 692.1 Pressure (mmhg) 656.5 Pressure (mmhg) 69.9 Linear Regression Plot Bench Temp ( C) 32.1 Bench Temp ( C) 32.7 Bench Temp ( C) 33.9 Bench Lamp Temp ( C) 54.1 Bench Lamp Temp ( C) 56.1 Bench Lamp Temp ( C) 56.7 Ozone Lamp Temp ( C) 68.2 Ozone Lamp Temp ( C) 71 Ozone Lamp Temp ( C) NA Transfer Standard Level LEVEL 2 Transfer Standard Level POINT TARGET Zero Full Scale 1 OZONE ANALYZER VERIFICATION & CALIBRATION () Ozone Source Yes Ozone Source Logger Slope Correction.9964 No LEVEL 3 O3 LAMP TRANSFER STANDARD AMBIENT ANALYZER STATION REFERENCE % or mv Display Corrected DAS Diff %Diff Linearity % DAS Diff %Diff Linearity % ZERO.3. -.3 N/A.%. -.3 N/A.1% 1 4 46.3 193.2 196.1 21. 4.9 2.5% -.1% 196. -.1 -.1%.% 2 3 42 15.4 152.8 156. 3.2 2.1%.% 152. -.8 -.5%.1% 3 2 38 11.1 111.9 114. 2.1 1.9%.1% 112..1.1%.% 4 1 NA 74.4 75.7 77. 1.3 1.7%.% 76..3.4% -.1% 5 7 31.7 57 58.1 59..9 1.6%.% 59..9 1.6% -.2% ZERO.1.4. -.4 N/A.%. -.4 N/A.1% Mean ABS % Diff 1.9% Mean ABS % Diff.5% Max ABS % Difference 2.5% Max ABS % Difference 1.6% Analog Test Analyzer DAS Reference DAS Slope 1.26 Slope.999 Y-Intercept -.53 Y-Intercept.1 1.1 Correlation 1. Correlation 1. 5 4 3 2 1 Residuals Plot Residual (ppb) Analyzer DAS (ppb) 15 1-5 -1 SLOPE INT -.3264 1 2 3 y =.981x + 3.7896 Transfer Standard (ppb) R² =.9944 5-15 5 1 15 2 25 Regression Concentration Value (ppb) NOTES: Forgot to write down lamp level for 4th point.

CALIBRATION AND VERIFICATION STANDARDS ABBR. BIBE-KB CLIENT SITE NAME National Park Service FIELD SPECIALIST Big Bend National Park - K-Bar Ranch Road Jake Zaragoza DATE DATE OF LAST VISIT 2/21/217 7/12/216 MANUFACTURER MODEL SERIAL # Calibration Expiration Date Ozone Transfer Standard Thermo 49i 11345196 1/2/218 MFC High Flow Reference Bios Definer 22-H 122997 1/9/217 MFC Low Flow Reference Temperature Reference Eutechnics 44 342 1/3/218 AT/RH Sensor Reference Rotronic HG2S3 239853 8/5/217 Barometric Pressure Reference Wind Speed Reference (high rpm) RM Young 1882A/1883A CA2241 1/26/218 Wind Speed Reference (low rpm) Wind Speed Torque Gauge RM Young 1831 NA Wind Direction Alignment Reference Brunton Transit 54791146 Wind Direction Linearity Reference ARS Jig 45 Degree Disc NA Wind Direction Torque Gauge RM Young 1831 NA Solar Radiation Reference Multiplier 2. LiCor Li-2X-L PY84778 11/17/217 UV Radiation Reference Multiplier Precipitation Reference Volume 945 ml Novalynx Drip Bottle NA Voltage Measurement Reference Voltage Source PM Flow Standard #1 PM Flow Standard #2 PM Flow Standard #3 PM Flow Standard #4 PM Temperature Standard #1 PM Temperature Standard #2 PM Temperature Standard #3 PM Temperature Standard #4 PM Barometric Pressure Standard #1 PM Barometric Pressure Standard #2 PM Barometric Pressure Standard #3 PM Barometric Pressure Standard #4 TEOM MTV Standard HiVol Direct Flow Standard HiVol Orifice Plate Orifice Manometer Stagnation Manometer

-5 ppb scale

-1 ppb scale