AUGUST 1 THROUGH AUGUST 31, 2014

ACTIVITY REPORT AUGUST 1 THROUGH AUGUST 31, 2014 I. Communications and Education Activity Report Community/School Presentations and Events: Spokane Clean Air staff participated in the following events/programs during August: Kids Day at Riverfront Park Unity in the Community, Riverfront Park City of Spokane employees (presentation on asbestos and other clean air programs) Print/Online Materials: News articles posted to web Welcome to the Neighborhood cards distributed in August = XXX DNR/SRCAA joint outdoor burning brochure received from printer Compliance Assistance Program: Compliance Assistance Program newsletter printed and distributed Updated Dry Cleaner Info Sheet; mailed Mailing to marijuana producers/processors Biz recognition program survey Asbestos: Updated webpages and documents as needed for the revised regs effective Sept 2 Developed new Fact Sheet: Vermiculite Insulation Containing Asbestos, which combined info from an EPA brochure and a Vermiculite guidance doc we previously developed Assisted with the coordination of a SHBA workshop in Sept to feature asbestos, among other environmental topics. Media activities: Background information provided to a reporter who was working on a story about the excess yard debris left over in the north county mobile home park; an on-camera interview was not requested. An article, Feeling the Burn and sidebar article Check air quality reports, stay inside when smoke from wildfires takes over skies appeared in the Aug. 5 th edition of the Spokesman Review both in print and online. Special Projects: Wood stove change-out program. Stats for August: o 16 vouchers issued in August; 4 devices replaced; o 25 jobs pending/underway o Current grant funds expended to date: $64,170 o Current grant funds remaining: $60,830 (about 70-75 more replacements) o Grant expires: June 2015 Summary: Community/School outreach events: 3 Print materials: 2 Media activities: 3

Page 2 of 13 II. Compliance Activity Report Facility Inspections Date Inspection Type of Completed Business Name Inspection Type of Process 8/14/1994 NATIONAL FOOD CORPORATION/PARK RD CCI Materials Handling, Agric. Mill Oper. 3/28/2014 KAISER ALUMINUM WASHINGTON, LLC PCE Materials Handling, Fuel Burning Equipment, Metallurgy Proc., Emergency Generator, NESHAP 7/13/2014 DARIGOLD INC CCI Fuel Burning Equipment 7/29/2014 TONERS SAND & GRAVEL CCI Concrete Prod., Materials Handling 7/30/2014 HONEYWELL ELECTRONIC MATERIALS (E. EUCLID) FCE Metal Plating, Metallurgy Proc. 7/30/2014 SNOW PEAK FOREST PRODUCTS INC CCI Materials Handling, Mill Operations 7/30/2014 POWDERTECH CCI Abrasive Blasting, Degreasers/ Cleaners, Evaporators 7/31/2014 FAIRCHILD AIR FORCE BASE (92D ARW) FCE Fuel Burning Equipment, Gas Dispensing Facility, Emergency Generator, Organic liquid Tanks, Surface Coating (Metal) 7/31/2014 SHANAHAN & SONS FURNITURE REFINISHING & CCI Surface Coating (Metal), Wood Stripping 7/31/2014 MICA LANDFILL CCI Refuse Systems 7/31/2014 FAIRCHILD AIR FORCE BASE CCI Gas Dispensing Facility, Organic liquid Tanks, Soil/Groundwater Remediation 8/4/2014 APPLEWAY GROUP BODY SHOP DBA/AUTONATION CCI Surface Coating (Metal) 8/5/2014 INTERMOUNTAIN FABRICATORS CCI Surface Coating (Metal) 8/5/2014 INLAND EMPIRE PAPER COMPANY FCE NESHAP 8/5/2014 SHRINER HOSPITAL CCI Fuel Burning Equipment, Emergency Generator 8/6/2014 HOTSTART, INC CCI Surface Coating (Metal) 8/12/2014 GEIGER CORRECTIONS CENTER CCI Fuel Burning Equipment 8/13/2014 GLOBAL MINING & TUNNELING EQUIPMENT INC CCI Surface Coating (Metal) 8/14/2014 WASHINGTON AUTO COLLISION CCI Surface Coating (Metal) 8/14/2014 KURT KIMBALL CCI Surface Coating (Metal) 8/14/2014 NATIONAL FOOD CORPORATION/PARK RD CCI Materials Handling, Agric. Mill Oper. 8/18/2014 TOBY'S BODY & FENDER CCI Surface Coating (Metal) 8/18/2014 U S WAX & POLYMER CCI Metal Plating 8/19/2014 WASHINGTON AUTO COLLISION CCI Surface Coating (Metal) 8/20/2014 TOWN & COUNTRY AUTO BODY & PAINT CCI Surface Coating (Metal) 8/20/2014 SPOKANE PROPELLER & DOCK INC CCI Surface Coating (Metal) 8/21/2014 QUARRY TILE CCI Brick/Clay Manuf., Materials Handling, Fuel Burning Equipment 8/21/2014 VALLEY AUTO REBUILDERS CCI Surface Coating (Metal) 8/21/2014 ALSCO CCI Fuel Burning Equipment 8/22/2014 THE WOOD MAN CCI Wood Stripping 8/25/2014 NORTHSIDE LANDFILL FCE Refuse Systems CCI Continuing Compliance Inspection 26 FCE Full Compliance Investigation 4 ICI Initial Compliance Inspection 0 IR Initial Registration 0 I Information 0 PCE Partial Compliance Evaluation 1

Page 3 of 13 STAFF INITIATED ACTIVITY & COMPLAINT SUMMARY Staff Initiated Activity Complaints Agricultural Burning 1 0 Air quality /smoke in the air 0 0 Asbestos 3 5 Dust from source/tracking 0 21 Dust from unpaved public road 1 1 Odors 1 6 Other/miscellaneous 4 12 Outdoor burning 1 11 Solid fuel burning device 0 4 Surface Coatinging 1 1 TOTAL 73 ASBESTOS PROGRAM NOTIFICATION PROJECT SIZE OR TYPE # OF NOTIFICATIONS > 10 ln ft and/or > 48 sq ft asbestos project (OOSFR) 44 OOSFR Abatement or OOSFR Demolition 7 All Demolition 10 10-259 ln ft and/or 48-159 sq ft with/without Demolition 17 260-999 ln ft and/or 160-4,999 sq ft with/without Demolition 27 GE 1000 ln ft and/or GE 5,000 sq ft 3 Emergency Notification 1 Alternate Asbestos Project Work Practices 0 Amendments 75 Exception for Hazardous Conditions 2 TOTAL 186 ASBESTOS INSPECTIONS/PRESENTATIONS DATE NAME LOCATION CITY TYPE 8/13/2014 Spokane House / Napinder Sahi 4301 W. Sunset Blvd. Spokane NI 8/13/2014 City of Spokane Bldg. Dept. 808 W. Spokane Falls Blvd. Spokane OT 8/15/2014 WSDOT 110 E. North Foothills Spokane NI 8/15/2014 Office of Presiding Apostle 3111 E. Marshall Spokane NI 8/21/2014 Affordable Asbestos Abatement / Louis Ray Demolition 8/25/2014 Affordable Asbestos Abatement / Louis Ray Demolition 8/27/2014 Spokane County / Avista Utilities / Loy Clark Pipeling 2914 E. Diamond Spokane NI 2914 E. Diamond Spokane NI 1318 N. Maple St. Spokane NI NI Non Owner Occupied, Single Family Residence Asbestos Inspection 6 IP Informational Presentation 0 OI Owner Occupied, Single Family Residence Asbestos Inspection 0 OT Other 1 Asbestos Fees Collected $31,400.00

Page 4 of 13 NOTICES OF VIOLATION Issued 4 Asbestos Control Standards 0 Dust Control 2 Odors 0 Resolved 6 Outdoor Burning 1 Appealed 0 Solid Fuel Burning Device Emissions 0 Installation of Air Pollution Source w/o a Permit/Registration 0 Not Complying with NOC/NOI Permit Requirements 1 Failure to Comply with Other Standards 0 Civil Penalties Collected $4,651.00 Burning Permits Issued $1,062.50 Agricultural/Spot Burn $0 Wood Stove Exemptions $0 III: Permitting & Air Quality A. Notices of Construction Received 0 Date NOC# Applicant, Site Address & Type

Page 5 of 13 B. Notices of Construction Approved 1 Date NOC# Applicant, Site Address & Type 8/6/14 #1644 Spokane Galvanizing, Inc., 2727 S. Garfield Rd., Boiler/Heating Unit C. NEHAPS/MACT 0 D. Temporary Sources Received 1 Date NOI# Applicant, Site Address & Type 8/4/14 #T535 Central Washington Asphalt, Euclid Pit, Asphalt Plant Temporary Sources Approved 2 Date NOI# Applicant, Site Address & Type 8/4/14 #T534 North Central Construction, Inc., Euclid Pit, Rock Crusher 8/15/14 #T535 Central Washington Asphalt, Euclid Pit, Asphalt Plant E. Paving Waiver Requests 0 Date PW# Applicant, Site Address & Type of Source F. Surface Coating Regulation Exemption 0 G. Number of Sources Registered 0 Registration Fees Collected - $1,422.20 Notice of Construction/SEPA/NOI Fees Collected $11,138.00 Air Operating Permits Issued 0 Air Operating Permits Renewed 0 AOP Permit Fees $0

Page 6 of 13 Spokane Regional Clean Air Agency Air Quality Report - August 2014 High temperatures and marginal to poor atmospheric ventilation associated with an atmospheric high pressure ridge allowed wildfire smoke and other air pollutants to push the Air Quality Index (AQI) well into the moderate air quality category from August 1 st through the 13 th (Figure 1). Fine particulate matter (PM 2.5 ) pollution remained at AQI-moderate levels through the period. On August 11, the high temperature in the Spokane area was about 98 F and the 8-hour average ozone concentration peaked at 0.070 ppm, which is an AQI of 84, the highest of any pollutant in August. Thunderstorms brought strong winds and blowing dust to the Columbia Basin and Spokane area on August 12, resulting in higher than normal levels of particulate matter (PM 10 ). See Appendix 1 of this report for information about federal air quality standards or Appendix 2 for a description of the AQI. Figure 1: Air Quality Index (AQI) values for August 2014. The data represent the Maximum AQI values across all monitoring stations within Spokane County. Daily mass concentrations of PM 2.5 monitored in August throughout the network are shown in Figure 2. Background levels of PM 2.5 are monitored at the Cheney-Turnbull monitoring station, which is far from urban areas. All of the other stations measure a combination of regional and locally-generated air pollution in urban environments. Figure 2: Multi-station 24-hour average PM 2.5 for August 2014; Spokane County.

Page 7 of 13 The August daily air quality data for all monitoring stations in the Spokane region are provided in Appendix 3. Current and historical air quality data can be obtained electronically from Ecology s air monitoring data website, https://fortress.wa.gov/ecy/enviwa/default.htm.

Page 8 of 13 Tables 1 and 2 contain the maximum AQI values for each pollutant for the month and for the year to date. Table 3 summarizes the year to date daily AQIs by category and compares them to last year s AQIs. Table 1: Maximum AQI values and pollutant concentrations for this reporting period Pollutant AQI/Concentration Location Date CO 10/0.9 ppm (8 hour) Spokane, 3 rd & Washington 8/11 and 8/12 O 3 84/0.070 ppm (8 hour) Spokane, Augusta & Fiske 8/11 PM 10 59/72 µg/m3 Spokane, Augusta & Fiske 8/12 PM 2.5 77/24.6 µg/m3 Spokane, Augusta & Fiske 8/11 Table 2: Maximum AQI values and pollutant concentrations to date this year Pollutant AQI/Concentration Location Date CO 18/1.6 ppm (8 hour) Spokane, 3rd & Washington 1/14 and 5/14 O 3 84/0.070 ppm (8 hour) Spokane, Augusta & Fiske 8/11 PM 10 64/81 µg/m3 Spokane, Augusta & Fiske 7/19 PM 2.5 105/37.3 µg/m3 Colbert, Greenbluff Rd. 7/18 Table 3: AQI summary as of August 31, 2014 Category Number of Days This Year Last Year to Date (using post- 3/18/2013 AQI) Good (0-50) 196 171 Moderate (51-100) 46 71 Unhealthy for Sensitive Groups (101-150) 1 1 Unhealthy (151-200) 0 0 Very Unhealthy (201-300) 0 0 Hazardous (>300) 0 0 Wind speed and direction are measured at the SRCAA s office, located near the intersection of Mission Ave and Greene St in Spokane. At this site, stronger southerly (S) to southwesterly (SW) surface winds are associated with more active weather regimes and usually promote better air quality than light easterly (E) to northeasterly (NE) winds, which typically occur during periods of poor atmospheric ventilation. During the wildfire season, however, any wind direction that carries smoke toward the Spokane area can cause a deterioration of air quality. Winds were relatively light in August. Easterly and eastnortheasterly wind directions were most common. Wildfire smoke is transported not only by surface winds, but also middle atmospheric winds, which often blow from a different direction. Figures 3 and 4 display the variation of hourly average wind speed with wind direction and the variation of PM 2.5 with wind direction, respectively.

Page 9 of 13 Figure 3: The wind rose depicts the variation of hourly average wind speed (mph) with the direction from which the wind was blowing in August. Figure 4: The PM 2.5 pollution rose depicts the variation of hourly average PM 2.5 which the wind was blowing in August. 3 ) with the direction from Ground-level ozone, a component of smog, is formed when nitrogen oxides and volatile organic compounds chemically react in the presence of sunlight. It is measured in units of parts per million (ppm) in ambient air. Ozone is a strong oxidizer and can damage lung tissue, thereby impairing respiratory function. The main sources of ozone precursors are motor vehicle emissions and refueling, gasoline storage and transport, paints, solvents and industry.

Page 10 of 13 The maximum 8-hour running average ozone concentration for the month was 0.070 ppm on August 11 when the high temperature reached 98 F (Figure 5). Eight hour average ozone concentrations in the range 0.060 to 0.075 ppm are considered moderate air quality by the AQI. When concentrations are below that level, air quality is good with respect to ground-level ozone. Figure 5: Eight hour maximum ozone concentrations for the Spokane region in August. Daily 1-hour maximum temperatures are also shown. Daily maximum temperature can be used as a surrogate for solar radiation (ozone is formed through a photochemical reaction) for determining potential ozone maximum concentrations. The threshold for the moderate category of the AQI for ozone is 0.06 ppm averaged over eight hours. An ozone measurement above 0.075 ppm, averaged over eight hours, is the threshold value for the federal ozone standard. It is not a violation of the standard to exceed this level on a given day because determination of attainment status is based on averaging data over a period of years. See Appendix 1 for more detailed information about attainment of federal air quality standards. Appendix 1 National Ambient Air Quality Standards The Clean Air Act requires EPA to set National Ambient Air Quality Standards (NAAQS) for six common air pollutants, carbon monoxide (CO), lead (Pb), nitrogen dioxide (NO 2 ), particulate matter (PM 10 and PM 2.5 ), ground-level ozone (O 3 ) and sulfur dioxide (SO 2 ; Table A-1). These are known as criteria pollutants because the US EPA established regulatory limits to concentrations in ambient air using human health or environmentally based criteria. Carbon monoxide, particulate matter and ozone are monitored in Spokane County by the Spokane Regional Clean Air Agency (SRCAA) and the Washington State Department of Ecology (Ecology). Table A-1: National Ambient Air Quality Standards Primary Standards Secondary Standards Pollutant Level Averaging Time Level Averaging Time Carbon Monoxide 9 ppm (10 mg/m 3 ) 8-hour (1) None 35 ppm (40 mg/m 3 ) 1-hour (1) Lead 0.15 µg/m 3 (2) Rolling 3-Month Average Same as Primary 1.5 µg/m 3 Quarterly Average Same as Primary

Page 11 of 13 Nitrogen Dioxide 53 ppb (3) Annual (Arithmetic Average) Same as Primary 100 ppb 1-hour (4) None Particulate Matter (PM 10 ) 150 µg/m 3 24-hour (5) Same as Primary Particulate Matter (PM 2.5 ) 12.0 µg/m 3 Annual (6) (Arithmetic Average) Same as Primary 35 µg/m 3 24-hour (7) Same as Primary Ozone 0.075 ppm (2008 std) 8-hour (8) Same as Primary 0.08 ppm (1997 std) 8-hour (9) Same as Primary 0.12 ppm 1-hour (10) Same as Primary Sulfur Dioxide 0.03 ppm Annual (Arithmetic Average) 0.5 ppm 3-hour (1) (1) Not to be exceeded more than once per year. (2) Final rule signed October 15, 2008. 0.14 ppm 24-hour (1) 75 ppb (11) 1-hour None (3) The official level of the annual NO 2 standard is 0.053 ppm, equal to 53 ppb, which is shown here for the purpose of clearer comparison to the 1-hour standard (4) To attain this standard, the 3-year average of the 98th percentile of the daily maximum 1-hour average at each monitor within an area must not exceed 100 ppb (effective January 22, 2010). (5) Not to be exceeded more than once per year on average over 3 years. (6) On March 18, 2013, EPA strengthened the annual fine particle standard by revising the level from 15.0 micrograms per cubic meter (µg/m3) to 12.0µg/m3. An area will meet the standard if the three-year average of its annual average PM 2.5 concentration (at each monitoring site in the area) is less than or equal to 12.0 µg/m3. (7) To attain this standard, the 3-year average of the 98th percentile of 24-hour concentrations at each population-oriented monitor within an area must not exceed 35 µg/m3 (effective December 17, 2006). (8) To attain this standard, the 3-year average of the fourth-highest daily maximum 8-hour average ozone concentrations measured at each monitor within an area over each year must not exceed 0.075 ppm. (effective May 27, 2008) (9) (a) To attain this standard, the 3-year average of the fourth-highest daily maximum 8-hour average ozone concentrations measured at each monitor within an area over each year must not exceed 0.08 ppm. (b) The 1997 standard and the implementation rules for that standard will remain in place for implementation purposes as EPA undertakes rulemaking to address the transition from the 1997 ozone standard to the 2008 ozone standard. (c) EPA is in the process of reconsidering these standards (set in March 2008). (10) (a) EPA revoked the 1-hour ozone standard in all areas, although some areas have continuing obligations under that standard ("antibacksliding"). (b) The standard is attained when the expected number of days per calendar year with maximum hourly average concentrations above 0.12 ppm is < 1. (11) (a) Final rule signed June 2, 2010. To attain this standard, the 3-year average of the 99th percentile of the daily maximum 1-hour average at each monitor within an area must not exceed 75 ppb. Appendix 2 Air Quality Index The Air Quality Index (AQI) is EPA s color-coded tool for communicating daily air quality to the public and can be calculated for any of the criteria pollutants except lead, provided monitoring data are available. An index value above 100 indicates that the concentration of a criteria pollutant exceeded the limit established in the NAAQS. Categories of the AQI are good (green, 0-50), moderate (yellow, 51-100), unhealthy for sensitive groups (orange, 101-150), unhealthy (red, 151-200), very unhealthy (purple, 201-300) and hazardous (maroon, 301-500; Table A-2). On March 18, 2013, EPA reduced the good to moderate breakpoint for PM 3 2.5 ).

Page 12 of 13 Table A-2: Air pollutant breakpoints for the Air Quality Index. Air Quality Index Levels of Health Concern Color Code Index Numeri cal Value O 3 (ppm) 8-hour Good Green 0-50 0.000-0.059 Moderate Yellow 51-100 0.060-0.075 Unhealthy for Sensitive Groups (3) (3) Breakpoints O 3 (ppm) PM 2.5 1-hour (1) 3 ) 24-hour PM 10 3 ) 24-hour CO (ppm) 8-hour Health Effects 0.0-12.0 0-54 0.0-4.4 Air quality is considered satisfactory and air pollution poses little or no risk. 12.1-35.4 55-154 4.5-9.4 Air quality is acceptable; however, for some pollutants there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution. Orange 101-150 0.076-0.095 0.125-0.164 35.5-65.4 155-254 9.5-12.4 People especially sensitive to air pollution may experience health effects. The general public is not likely to be affected. An AQI in this category or above indicates that air pollution exceeds levels acceptable under federal air quality standards. Unhealthy Red 151-200 0.096-0.115 0.165-0.204 65.5-150.4 255-354 12.5-15.4 Everyone may begin to experience health effects; members of sensitive groups may experience more serious health effects. Very Unhealthy Purple 201-300 0.116-0.374 0.205-0.404 150.5-250.4 355-424 15.5-30.4 Health alert: everyone may experience more serious health effects. Hazardous Maroon >300 (2) 0.405+ 250.5+ 425+ 30.5+ Health warnings of emergency conditions. The entire population is more likely to be affected. 1 Areas are generally required to report the AQI based on 8-hour ozone values. However, there are a small number of areas where an AQI based on 1-hour ozone values would be more precautionary. In these cases, in addition to calculating the 8- hour ozone index value, the 1-hour ozone index value may be calculated, and the maximum of the two values reported. 2 8-hour O 3 values do not define higher AQI values ( 301). AQI values of 301 or greater are calculated with 1-hour O 3 concentrations. 3 There is no AQI for 1-hour O 3 concentrations below the Unhealthy for Sensitive Groups level.

Page 13 of 13 Appendix 3 Table A-3: Summary air quality data for August for air monitoring stations in Spokane County. The carbon monoxide and ozone data are maximum 8-hour running averages in parts per million (ppm) and the PM data are 24-hour averages in 3 ). Fine particulate matter data are unavailable for East Broadway because the analyzer was at the manufacturer for repair. Monitoring was suspended at Airway Heights until August 12 because the roof of Sunset Elementary School (where the monitor is located) was being resurfaced. Date CO 3rd & Washington (8 hour max, ppm) Ozone Augusta & Fiske (ppm) Ozone Greenbluff (ppm) Ozone Turnbull NWR (ppm) PM2.5 Augusta & Fiske TEOM (µg/m 3 ) PM2.5 College Ave TEOM (µg/m 3 ) 8/1 0.5 0.058 0.053 0.062 15.7 14.1 12.6 NA 8.7 11.7 12.0 35 29 8/2 0.6 0.049 0.048 0.049 15.0 12.3 NA NA 5.9 10.9 8.0 33 16 8/3 0.3 0.058 NA 0.062 16.5 12.2 11.2 NA 5.9 13.2 10.4 20 13 8/4 0.6 0.056 0.050 0.061 19.4 14.2 12.7 NA 9.4 14.8 10.8 25 25 8/5 0.6 0.059 0.064 0.059 23.7 17.7 15.5 NA 12.9 17.0 15.2 33 40 8/6 0.6 0.048 0.055 0.050 16.5 14.8 15.0 NA 7.0 12.8 14.0 41 25 8/7 0.6 0.047 0.051 0.050 10.9 14.9 12.4 NA 8.8 12.9 11.8 32 24 8/8 0.7 0.045 0.049 0.046 9.3 16.9 14.1 NA 11.4 13.9 11.4 35 28 8/9 0.7 0.054 0.053 0.049 16.3 16.5 15.8 NA 11.5 14.1 14.1 29 24 8/10 0.7 0.058 0.050 0.059 20.4 19.1 17.5 NA 9.5 17.7 16.7 29 23 8/11 0.9 0.070 0.058 0.062 24.6 24.1 19.5 NA 13.3 23.4 20.2 40 28 8/12 0.9 0.041 0.050 0.051 21.1 22.7 16.9 17.8 14.3 16.0 17.7 72 42 8/13 0.4 0.023 0.027 0.023 14.1 9.5 7.2 7.7 4.5 9.8 10.2 16 12 8/14 0.5 0.053 0.043 0.058 10.3 8.0 7.3 6.9 4.0 7.9 8.6 13 9 8/15 0.8 0.041 0.041 0.048 10.9 6.8 5.6 6.2 6.8 7.4 7.0 11 10 8/16 0.6 0.047 0.046 0.049 9.6 6.3 5.0 5.2 4.0 6.6 6.2 10 9 8/17 0.7 0.052 0.047 0.055 11.9 8.8 8.2 7.1 5.8 9.4 8.3 14 11 8/18 0.8 0.044 0.039 0.051 16.7 13.1 10.2 12.6 6.3 16.4 12.6 26 17 8/19 0.7 0.045 0.043 0.054 12.9 11.1 10.6 10.3 8.8 11.8 9.8 23 23 8/20 0.6 0.036 0.037 0.036 7.0 5.8 4.2 5.8 3.1 4.1 5.1 17 12 8/21 0.5 0.048 0.046 0.046 7.6 5.0 4.7 4.9 4.3 4.7 4.6 13 11 8/22 0.5 0.036 0.039 0.045 6.1 4.3 4.1 4.0 3.3 3.8 4.0 7 9 8/23 0.5 0.032 0.032 0.037 4.9 3.6 3.4 3.1 1.5 2.7 3.3 7 3 8/24 0.5 0.032 0.031 0.039 6.0 4.8 4.7 4.1 2.1 3.9 4.2 9 4 8/25 0.7 0.036 0.035 0.043 7.5 5.1 5.1 4.7 4.6 4.8 5.0 15 12 8/26 0.8 0.046 0.049 0.046 9.8 8.2 7.6 7.3 4.2 6.4 6.9 27 14 8/27 0.7 0.049 0.052 0.053 10.6 8.8 8.1 7.5 6.5 6.9 7.6 29 20 8/28 0.5 0.038 0.042 0.041 8.3 6.8 6.6 6.6 3.8 5.2 6.7 34 17 8/29 0.5 0.040 0.044 0.045 7.3 5.1 5.7 5.3 1.8 3.6 5.0 34 17 8/30 0.3 0.042 0.040 0.044 4.9 5.4 5.1 4.5 1.6 2.7 4.4 23 12 8/31 0.4 0.039 0.038 0.041 5.1 3.6 3.9 3.3 1.2 2.8 3.9 13 7 AVG 0.6 0.046 0.045 0.049 12.3 10.6 9.4 6.7 6.3 9.7 9.2 25 18 MAX 0.9 0.070 0.064 0.062 24.6 24.1 19.5 17.8 14.3 23.4 20.2 72 42 PM2.5 Colbert TEOM (µg/m 3 ) PM2.5 Airway Heights TEOM (µg/m 3 ) PM2.5 Turnbull NWR TEOM (µg/m 3 ) PM2.5 Monroe & Wellesley nephelometer (µg/m 3 ) PM2.5 Liberty Lake TEOM (µg/m 3 ) PM10 Augusta & Fiske TEOM (µg/m 3 ) PM10 Turnbull NWR TEOM (µg/m 3 )