United States Environmental Protection Agency Region 8 """50 Li.,coin Street Denver, Colorado 80295 EPA-908/2-80-002 October, 1980 Surveillance and Analysis Division, Data Analysis Branch Air Quality Trends in Region VIII 1979 Data ------- EPA - 908/2-80-002 U.S Envfronmental Protection Agency AIR QUALITY TRENDS IN REGION VIII (1979 DATA) Data Analysis Branch Surveillance and Analysis Division Denver, Colorado September 1980 ------- DISCLAIMER This report has been reviewed by the Surveillance and Analysis Division, U.S. Environmental Protection Agency Region Viii, and approved for publication. Mention of trade names or comeercial products does not constitute endorsement or recommendation for use. Document is available to the public through the National Technical Information Service, Springfield, Virginia 22161. i ------- ABSTRACT Air quality trends and status f or the calendar year 1979 were determined for the six states in Region VIII. These states include Colorado, Montana, North Dakota, South Dakota, Utah and Wyoming. Data resident in the SAROAD national data bank was analyzed. Statistical tests which detect significant differences between two populations were utilized to identify trends. The status and severity of air pollutants was reported as a direct measure of air quality standard and alert level exceedences. The report includes a suninary of air quality in each nonattainment area. ii ------- CONTENTS Page Abstract Table of Contents ill SECTION I Introduction . 2 Air Quality Standards g AirQualityNoflattaiflmefltArea s Analytical Procedures Air Quality 13 SECTION II StateAirQUalitySUlTlflaries 16 General Description 17 Colorado 19 Montana 32 NorthDakOta.. 45 SouthDakota 50 Utah 57 Wyoming 69 iii ------- APP ENDI CES A. National Ambient Air Quality Standards 76 B. Break points for Pollution Standards Index (PSI) C. Procedures Used to Determine Status 0. Nonattainment Area Maps 78 80 87 Denver Denver/Boul der/Longmont Pueblo Larimer/Weld . . . . . Mesa Missoula Primary TSP Missoula Secondary TSP Missoula CO . . . Columbia Falls . . Coistrip . GreatFalls B lllingsCO Billings TSP Laurel . Butte Anaconda East Helena S02 . . East Helena TSP . . RapidCity. Sweetwater County . . . . . . . . . . . . . . . . . . . . S . . S S . . . . S S S 88 89 90 91 92 94 . . 95 . . . 96 97 98 99 100 101 102 103 104 105 106 107 108 . S S S . . . S iv ------- SECTION I 1 ------- Introduction Air quality monitoring activities have increased substantially in Region VIII over the past few years both in scope and frequency. These increases are due to public demand for accurate information about harmful pollutants in the environment and to the passage of Federal Legislation, namely, The Clean Air Act Amendments. To fulfill the requirements of these legislative mandates State agencies have planned and developed extensive monitoring networks which have generated a mass of air quality data. This report presents a portrayal of current ambient air quality status and trends in the six states comprising EPAs Region VIII. Trend analyses performed on the 1977, 1978, and 1979 air quality data available in the SAROAD System indicate that 42 of the 252 counties, where sufficient data were available, experienced statistically significant changes for at least one pollutant group. Air quality was found to be deteriorating in 26 counties and improving in 19 counties. Table 1 summarizes these trends. The severity analyses of 1979 air data reveals that total suspended particulates continue to present the most wide-spread pollutant problem in the region where 19 of the 30 counties which exceeded the primary standard also exceeded alert levels. TSP was sampled in 118 counties. These values represent an increase over those for 1978 when 130 counties sampled TSP and 11 of the 27 counties with violations of the primary Health Standard also exceeded the alert level. 2 ------- During 1979 18 counties monitored for carbon monoxide. Of the 12 counties where violations of the primary standard occurred, 7 were found which also violated alert levels. In 1978 there were 13 counties with primary CO violations, including 3 which also had alert violations. No appreciable trend was observed between standards violations occurring in 1978 and 1979 for sulphur dioxide, nitrogen dioxide or ozone. Lead, newly designated as a criteria pollutant, was sampled in 19 counties with only one county experiencing violations of the primary standard. The majority of sites sampling for lead are located in rural rather than in urban settings and it is difficult to draw any meaningful results from the lead data, either in terms of health affects or in terms of trends in concentrations due to vehicular emissions. Probably with the increased use of unleaded gas in motor vehicles and with old vehicle attrition, lead pollution will cease to present any major pollution problem. The comparisons of single year observations of pollutant concentrations is generally considered inadequate for accurately measuring and describing trends. Meteorological considerations such as precipitation, solar intensity, wind speed and direction have a major effect on year-to-year short-term changes in pollutants and should not be neglected. However, due to the lack of long-term monitoring data and missing periods in the data at most sites, short-term trends must be calculated. Current trends referenced in this report are approximated from the 1977, 1978, and 1979 data bases. 3 ------- The map in Figure 1 gives a county-by-county picture of Regional air quality status during 1979. In constructing this map, the air quality of an entire county is determined by that site in the county exhibiting the most severe pollutant violations. Counties colored blue are those which sampled at least one of the criteria pollutants for 75 percent of the total possible sampling time and did not violate the health standard. Yellow indicates that at least one of the sampled sites in the county violated primary air quality standards. Red indicates that at least one of the sampled sites in the county exceeded the alert level. Counties without current monitoring data or with less than 75 percent of the total possible sample are colored green. 4 ------- TABLE 1 Air Quality Monitoring Summary of Region Total sites Counties with data Counties exceeding primary standard Counties exceeding alert level Counties with deteriorating air quality Counties with improving air quality Counties with insufficient data or no discernible trend Air Monitoring In VIII in 1979 TSP S02 NO 2 CO OZONE LEAD TOTAL 227 54 49 23 22 37 412 118 39 41 18 18 19 252 30 3 0 12 5 1 51 19 0 0 7 0 0 26 12 1 4 5 4 0 26 4 3 5 4 3 0 19 1 U.S. EPA. Guideline for Public Reporting of Daily Air Quality Standards Index (PSI), EPA 450/276013, August 1976. Pollutant 2 Instrumentation measures ozone which Is the primary constituent of oxidants. 5 ------- -Li Region VIII Air Quality Status 1979 Counties meeting primary ambient air quality standards (at least one criteria pollutant sampi ed) Counties not meeting pri- mary anbient air quality standards for at least cne primary pollutant i Counties without currect ironitoring data or in- sufficient data. Figure 1 ------- TABLE 2 Air Quality Pollutants and Health Effects Pollutant Physical Description Health Effect at Concentrations above the Primary Standard Total Suspended Particulates (TSP) TSP is a measurement of parti- cles in the air (such as soot, mist, and sprays) and includes non-toxic materials (dust and dirt) as well as toxic mater- ials (lead, asbestos, sulfates). Natural and man-made sources contribute to TSP which affects the respiratory system in varying degrees depending on particle size and chemical composition. Particle sizes up to 15 micron size can be inhaled into the lungs and particles smaller than 2.5 can become lodged deeply in the lungs. Normally the size of major concern is from .1 to 3 microns. Aggravation of asthma and chronic lung diseases, increased cough, chest discom- fort, restricted activity, aggravation of heart and lung disease symptoms in the elderly, increas- ed death rate; long term exposure to TSP levels from 100-300 Mg/rn 3 may cause multiple lung func- tion changes. Sulfur Dioxide (SO 2 ) SO 2 is a colorless gas with a rotten egg smell that is detectable by most people at concentrations greater than .3 to 1 part per million. When combined with water it forms sulfuric acid. When in the air in sufficient quantity it can combine with rain to form acid rain. This is a problem whose frequency is just being recognized. The most common form of SO 2 in the atmosphere, results from combustion of coal and gas or as a byproduct in mineral smelting operations. SO 2 reacts readily with other atmospheric pollutants to form sulfates, a group of compounds responsible for aggravation of respiratory ailments. Aggravation of asthma, aggravation of heart and lung disease symptoms in the elderly, increased lung illness, increas- ed death rate; long term exposure to SO 2 levels from 05-lppm may cause multiple lung function changes 7 ------- Carbon Monoxide (CO) CO is a colorless, odorless, tasteless gas--a toxic product of combustion. The automobile engine represents the major single source of this pollutant Interference with mental and physical activity, reduced capacity in persons suffering from heart and other circulatory disorders; decreases visual perception and general alertness. Ozone and other photochemical oxidant compounds are formed by a complex series of chemical reactions occurring when hydrocarbons and nitrogen oxides from motor vehicles or other emission sources are exposed to sunlight. Ozone, the critical constituent in oxidants, is a severe irritant to human tissue. Aggravation of asthma and chronic lung disease, irritation of the eye and of the respiratory tract, decreased vision, reduced heart and lung capacity. Nitrogen Dioxide (NO 2 ) NO 2 is a reddish-brown gas with a pungent odor. It is corrosive and is an oxidizing agent which reacts with hydrocarbon in sunlight to form photochemical oxidants (ozone-primarily). NO 2 is formed during high temperature combustion (motor vehicle engines and powerplant boilers). Increased chronic bronchitis, reduced resistance to disease, aggravation of chronic lung disease. Lead (Pb) Lead is a gray-white metal with a high luster and low melt- ing point. It is produced in a much larger quantity than any other toxic metal. The major use of lead is as a knock retardant (tetraethyl lead) in gasoline. More than half the lead in the country goes into gasoline to produce aln ost 90% of the total lead in the atmosphere, a large majority of which is in particualte form (usually less than 2 microns). Impairs hemoglobin production, causes anemia, often fatal to infants. Ozone (03) . 8 ------- Air Quality Standards The Environmental Protection Agency has been given the authority to establish ambient air quality standards which specify, for the principal and most widespread classes of air pollutants, limitations necessary to protect the public health and welfare. These pollutants currently are total suspended particulate matter, sulfur dioxide, nitrogen dioxide, ozone, and carbon monoxide. Standards for lead have recently been proposed. Two types of standards were established. Primary standards are set at levels to protect human health. Secondary standards are set at levels to protect against other forms of damage to such things as vegetation and materials. The numerical value for each standard is listed in Appendix A. Air Quality Nonattainment Areas The Clean Air Act Amendments of 1977 placed additional requirements on the States and EPA. Section 107(d) directed each State to submit a list of the NAAQS attainment status for all areas within the State. These designations were to be based on air quality levels that existed at the time the Amendments were enacted. States were required by EPA guidance to consider the most recent four quarters of monitored ambient air quality data available. If these data showed no standards violations, then the previous four quarters of monitoring data were to be examined to assure that the current indication of attainment was not the result of a single years data reflecting 9 ------- unrepresentative meteorological conditions. In the absence of sufficient monitored air quality data, other evaluation methods were used, including air quality disperson modeling. The Act specified that the designated areas could be based on air quality control regions (AQCRs) or any subportions of these areas. EPA advised States they could divide (AQCRs) into various nonattainment, attainment, or unclassified portions, i.e., county, subcounty, or other geographic areas as long as the area could be clearly defined in a written narrative. Additionally, a different geographic area could be used in designating the status for each pollutant. The section 107(d) designations were meant to provide a starting point for States in their effort to correct existing air quality problems and to implement programs under the 1977 CM Amendments. But the designation of an area as nonattainment or attainment must be considered only a point of departure and not a final, inflexible end in itself. Table 2 indicates, on a Stateby-State, pollutant-by-pollutant basis, the attainment status of every area as submitted by the appropriate State agency and approved, or as designated by the Environmental Protection Agency. No distinctions have been made as to the severity of the violations recorded in the areas designated by nonattainment in this table. Each area was designated nonattainment for primary or secondary standard violations. A P indicates does not meet primary standards and S indicates does not meet secondary standards. 1979 status and trends f or each nonattainment area in Region VIII are described in the appropriate state sumary. 10 ------- TABLE 3 EPA NONATTAINMENT AREAS IN REGION VIII FEDERAL REGISTER - MARCH 3, 1978 TSP S02 N02 CO Montana Coistrip Area P City of Columbia Falls P City of Missoula P Missoula Area S Billings Area S Great Falls Area S Butte Area S East Helena Area S PS Laurel Area P Anaconda Area PS City of Billings P Yellowstone County P Rosebud County P So. Dak. Rapid City Area P Utah Davis County S P Salt Lake County P PS P P Utah County P P Weber County P P City of Price P Cedar City S PS Tooele County PS Uintah County P City of Bountiful P City of Ogden P City of Provo P Wyoming Trona Industrial Area P Sweetwater County Cob. Larimer-Weld P P designated area Denver Designated Area P P p Cob. Springs 3-C P Pueblo 3-C P Mesa Designated Area P El Paso County P Ft. Collins-Greeley P - Does not meet primary standard S - Does not meet secondary standard 11 ------- TABLE 4 EPA NONATTAINMENT AREAS IN REGION VIII 1979 TSP SOz N02 Co Q Cob. Denver Designated Area P P P p Cob. Springs 3-C P p Pueblo 3C P Mesa Designated Area P Ft. Collins-Greeley S P Montana Coistrip Area P City of Columbia Falls P City of Missoula P P Missoula Area S City of Billings S P Great Falls Area S Butte Area P East Helena Area S PS Laurel Area P Anaconda Area PS So. Dak. Rapid City Area P - Utah Davis County S P Salt Lake County P PS P Utah County P P Weber County P P Cedar City PS Tooele County PS City of Bountiful P City of Ogden P City of Provo P Salt Lake City P Wyoming Trona Industrial Area P P - Does not meet primary standard S - Does not meet secondary standard 12 ------- Analytical Procedures - Air Quality Status and Severity Analysis Status and severity of air quality are determined by comparing measurements made at monitoring stations to air pollution standards. The indicator used to characterize air quality status in this manner was the number of days in which measurements exceed the primary standards at the worst site in each county. The indicator may not actually represent air quality for the entire county, however the worst site is always selected in an area where measured concentrations are affecting some segment of the population. Complete procedures for determining status are documentated in Appendix C. Another indicator is used to demonstrate the severity of the problem. Each pollutant has been assigned an alert level, the concentration at which the public must be notified of possible adverse health affects. These values shown in Appendix B are significantly higher than the standards and are not frequently encountered. These two indicators correspond to break points in the Pollutant Standards Index (PSI) which is becoming the nationwide index for reporting air quality levels to the public. In the PSI the worst site pollutant concentration in each metropolitan are is chosen, and the index is calculated from the concentration at the site referenced to primary standards and alert levels. PSI breakpoints are detailed by pollutant in Appendix B. 13 ------- Trend Analysis For a long while it has been felt by many researchers in the field that air pollutant concentration probability distributions were not known at all or at the very best only poorly approximated. This is true f or the types of distributional forms previously studied, namely the log normal and distributions similar to the log normal (e.g., SB, gari na, etc). All of these fall short in providing a usable model for the data. As a result, nonparametric techniques, which are inherently less powerful than parametric techniques, have been advised f or trending purposes. Recent statistical research in the Data Analysis Branch has brought to our attention a type of truncated normal distribution which has proven quite effective in modeling air data. Our trending techniques have been based upon this distribution and are totally parametric and extremely powerful. Although based upon complicated formulae, the trending technique is intuitively appealing. Utilizing the new distributional form, a 95 percent confidence interval is constructed for the true concentration mean for each year under study. This mean is not the same as a simple arithmetic mean or a geometric mean. The more proper term for the type of mean used here is the expected value, with the definition of this term being described as it ususally is in mathematics and statistics. The expected value is the single best measure of the central tendency of a data set. Each time interval is inspected for any overlap or cormionly included parts with other intervals. If no overlap occurs, we can safely assume that there has been a significant shift in mean concentrations, i.e., a trend is present. The specific type of trend, whether increasing or decreasing, is defined by the relative position of the interval along the 14 ------- concentration real number line. For example, if the 1ower bound of the 95 percent confidence interval for 1978 is greater than the upper bound of the 95 percent confidence interval for 1977, the 1978 mean value has significantly shifted upward from the 1977 mean value. 15 ------- SECTION II STATE AIR QUALITY SUMMARIES 16 ------- The following graphics and charts appear as a part of each state summary: 1. A map showing the location of all active air quality monitoring sites in the state. Stations with more than 75 percent of all possible data are represented by squares. Circles identify stations where less than 75 percent of the data was collected. 2. A table specifying stations and pollutants used for trends and/or status in each county. Stations with less than three years of data are not used for trending. They are, however, used to determine current status. Each station used for either status or trends is required to have 75 percent of the maximum possible data. 3. A table showing the number of violation days for the years 1977, 1978, and 1979 for each pollutant at sites within designated nonattainment areas. Both alert level and primary level violation days are noted along with a count of sampling days. 4. A bar chart showing total days sampled and alert and primary violation days in 1979 by county and specific site. Each site with a violation of criteria pollutants is displayed. 17 ------- 5. A chart showing current status and trends by county and pollutant. If there were no data or insufficent data in the county, arrows are not shown. Status was determined by comparing the 1977, 1978, and 1979 data. Ozone status is based on a three year average of 1-hour primary level violations. 18 ------- Colorado Air Quality The Denver metropolitan area and the Fort Collins/Greeley areas still are the major air pollution problem areas in Colorado. Denver still has high TSP violation rates at the 21st and Broadway site. However, TSP violations were noted at sites in 16 other Colorado Counties. Nearly 1/2 of all instances in which the TSP health standard was exceeded involved concentrations at or above the alert level, not only in heavily populated Denver county, but also throughout most of the state. Carbon monoxide violations tend to be confined to the metropolitan areas of Denver, Colorado Springs, and Greeley. Denver has by far the most numerous CO violations with a generally increasing trend. Twenty-one percent of the total CO exceedences of the primary health standard involved concentrations above the alert level. Ozone violations were limited to the Denver Metro area. They also showed an increasing trend. Status of Nonattainment Areas in Colorado Larimer-Weld Designated Area - Colorado initiated a change to drop the primary nonattainment status for TSP on November 6, 1979. The designation for TSP was changed to a secondary standard for only Fort Collins and Greeley. In 1978 daily primary and alert level violations occurred at the Loveland, Johnstown, Platteville, Fort Collins, Greeley and La Salle stations. Yearly geometric mean primary violations occurred at the Loveland, Johnstown and La Salle stations. The year 1979 still showed annual geometric mean primary violations at the Loveland and Johnstown sites located in the Larimer-Weld County area. 19 ------- On November 26, 1979, the area was changed to unclassified for ozone. The only station sampling ozone for Larimer-Weld Counties was at Greeley. This showed one violation in 1978 and one in 1979. El Paso County - This area was changed to unclassified for ozone on November 25, 1979. No violations were observed at the Colorado Springs station for 1976 to 1979. Denver Designated Area The nitrogen dioxide nonattainment area generally represented by the Denver Metro area is shown on the map in Appendix The carbon monoxide and ozone nonattainment areas consist of Adams, Arapahoe, Boulder, Denver, Douglas and Jefferson Counties. Automobile emissions and meteorological phenomenon common to the Rocky Mountains are the main causes of NO 2 , CO and 03 pollutant problems. There were 2 stations monitoring NO 2 during 1979, 3 in 1978 and 5 in 1977. No violations were noted in 1978 and 1979. Nine stations were used to monitor CO with no discernible trend in violation rate f or the three year period. Of the 365 days sampled in 1979, 160 days showed primary or alert level violations. Seven ozone stations operating in 1978 and 1979 (5 in 1977) showed no specific trend during this period. There were 12 primary violations in 1979. 20 ------- Total suspended particulates were sampled in an area shown by the map in Appendix . (Generally, the Denver metro area). A traditional cause of violations is the Cherokee Power Plant while nontraditional causes include street cleaning, winter sanding, unpaved roads, construction work, demolition activities, unpaved alleyways and parking areas. The number of sampling stations remained about the same, i.e., 25 in 1977, 22 in 1978 and 23 in 1979, but the sampling days increased from 91 in 1977 to 144 in 1978 and 177 in 1979. Primary to alert level violation ratios remained about the same for 1977 and 1978 but increased substantially In 1979. Increased downtown construction appears to be one of the causes of the increase in TSP violation levels. Colorado Springs 3C Area - The area of El Paso County in and around Colorado Springs comprises this area. CO problems are primarily caused by automobiles and the meteorology and topography of the area. Two stations reported CO samples for 365 days each of the last two years. The last three years have shown a primary violation day increase from 0 in 1977 to 4 in 1978 and 11 violations in 1979. Along with the semi-arid climate which promotes the potential for air borne dust, winter sanding, grading and construction activities contribute to TSP problems. The one station which sampled this area for an average of 78 days per year showed no primary violations during 1977, 1978 or 1979. 21 ------- Pueblo 3C Area - The map in Appendix D shows the area of nonattainment for TSP which consists of the City of Pueblo and its irTinediate outskirts. The CF&I Steel Company is one of the major contributors to TSP along with the standard nontraditional sources. Two stations sampled an average of 88 days. During 1977 six primary violation days were observed. There was one violation in 1978 and two in 1979. Mesa Designated Area This area is in and around Grand Junction. Three stations were sampled in 1977 and 1978 with four stations used in 1979. No violations for TSP were noted in any of the three years which were sampled an average of 85 days per year. Fort Collins - Greeley Area The City limits of Fort Collins and Greeley constitute the limits of this area. Motor vehicles cause the vast majority of CO emissions in these two cities with the meteorology and topography of the area being of some consideration in pollution dispersion. The two stations (one in Greeley and one in Fort Collins) sampled daily and showed a marked increase in carbon monoxide primary standard violations with 10 in 1977, 6 in 1978 and 31 in 1979. The TSP sampling donc at -t .rcc stations showed no apparent increase in primary violation levels between 1977, 1978 and 1979 (1 to 2 to 2). The average number of sampling days was 83 per year. 22 ------- Stations with greater than 75% of maximum possible data Stations with less than 75% of maximum possible data QJLORA]JO 1JNITORIN( 1 I I SITES ADAMS a ARAPAHOE U - - ____._- / 23 ------- COLORADO STATIONS USED FOR TRENDS AND/OR STATUS County City cr Location Station Number TSP SO2 NO2 CO O, LgAD Adams Adams 060020001F01 X Aurora 060140001F01 X Brighton 060240001FO1 X Welby 062210001F01 X X X X Westminister 062240002F01 X Alamosa Alamosa 060040001F01 X Arapahoe Cherry Creek Dam 060080001F01 X Englewood 060780001F01 X S. Univ. Blvd 060 080002F01 X X Archuletta Pagosa Springs 060100001F01 X Boulder Boulder 060200001F01 X Boulder 060200008G01 X Boulder 060200006G05 Longmont 061460001F01 X Clear Creek Idaho Springs 060360001FO1 X Delta Delta 060540001F01 X Denver Denver-Annex 060580001F01 X Denver 21st & Bdwy 060580002F01 X X X Denver Health Dept 060580007FO1 X Denver Cob Blvd 060580010F01 X Denver-Marion 060580012FO1 X Denver-Julian 060580009FO1 X X Douglas Castle Rock 060660001F01 X Eagle Vail 060700001F01 X El Paso Colorado Springs 060380004FO1 X X X X Fremont Canon City 060300001FO1 X Garfield Glenwood Springs 060920001F01 X Rifle 060880001F01 X Gunnison Crested Butte 061020001FO1 X Crested Butte 061040002F01 X * Status Only 24 ------- COLORADO STATIONS USED FOR TRENDS AND/OR STATUS County Cjjy L tion Station Number TSP S02 N02 CO O LEAO Jefferson Arvada 060120002F01 X X Arvada 0601 20003F01 X Golden 060940001F01 X Lakewood 061260001F01 X La Plata Durango 060680003F01 X Red Mesa 061300083K03 X Larimer Fort Collins 060820001F01 X X Loveland 061480002F01 X Las Animas Trinidad 062160002F01 X Mesa Fruita 06152 0001F01 X Grand Junction 060980010F01 X Palisade 061520002F01 X Moffat Craig 060480001F01 Montez na Mesa Verde 061530003F03 X Towaoc 0616000041(03 X Montrose Montrose 061620001F01 X Otero La Junta 061220001F01 X Pitkin Aspen 061780001F01 X Prowers Lamar 061280001F01 X Pueblo Pueblo Fire Stat 061820003F01 X Pueblo Health Dept 061820007F01 X X Rio Blanco Rangely 061860002F01 X Routt Steamboat Springs 061920003F01 X San Miguel Telluride 062000001F01 X Weld Greeley 061000005F01 X X Greeley 061000006F01 X Johnstown 062220003F01 X Platteville 062720005F01 X *Status Only 25 ------- COLORADO STATIONS NOT USED FOR TRENDS AND/OR STATUS - LESS THAN 75% OF MAXIMUM DAYS County City or Location Station Number TSP Ox LEAD Boulder Broomfield 060260001F01 X Boulder 060200008G01 X Denver Denver-Gates Rubber 060580003FO1 X Denver-lOlO S. Broadway 060580003F02 X Eagle Eagle Courthouse 060700004F01 X El Paso Manitou Springs 061500001F01 X Fremont Florence 060800001F01 X Jefferson Edgewater 060720001F01 X Rocky Flats 061140001F02 X La Plata Ignacio 061300003K03 X Logan Sterling 062080001F01 X Mesa Grand Junction 060980011F01 X Morgan Brush 060280001F01 X Otero Rocky Ford 061900001F01 X Weld Greeley 061000003F01 X 26 ------- AIR QUALITY TRENDS BASED ON STANDARD VIOLATIONS COLORADO NONATTAINMENT AREAS Total Suspended Particulates Nitrogen Dioxide Carbon Monoxide Stations Number Average W/Yearly Number Number Days Violation of Percent Average of Days Violation of Nonattainment Area Year Sampled Days Stations Obs./Sta. Violations Stations Sampled Days Stations Denver Designated 1977 91 A4/P17 25 86% P-2 5 365 A18/P145 9 Area 1978 144 A8jP26 22 72% P0 3 365 A34/P484 9 1979 177 A27/P52 23 91% P-O 2 365 A34/P-160 9 Colorado Springs 3C 1977 80 P-O 1 350 P-0 2 1978 71 PO 1 365 A-1/P4 2 1979 82 P-O 1 365 A-i/P-il 2 Pueblo 3C 1977 90 Ai/P6 2 1978 79 P-i 2 1979 96 A1/P2 2 Mesa Designated Area 1977 91 PO 3 1978 77 P-0 3 1979 86 P-0 4 Fort Collins-Greeley 1977 81 Pi 3 1978 81 P-2 3 1979 87 A-i/P-2 3 A Alert Violation Days P - Primary Standard Violation Days ------- AIR QUALITY TRENDS BASED ON STANDARD VIOLATIONS COLORADO NONATTAINMENT AREAS Ozone Number Days Violation of Nonattainment Area Year Sampled Days Stations Denver Designated Area 1977 363 P-15 5 1978 356 A- .1/P-5 7 1979 365 P12 7 A - Alert Violations Days P - Primary Standard Violation Days ------- NUMBER OF DAYS THAT PRIMARY STANDARD OR ALERT LEVEL WAS EXCEEDED IN 1979 COLORADO TOTAL SUSPENDED PARTICULATES Days County (City or Location) Sampled Adams (Adams City) 80 (Brighton) 82 Alamosa (Alamosa) 83 Archuleta (Pagosa Spgs.) 80 Boulder (Longmont) 71 Clear Creek (Idaho Spgs.) 82 Denver (City Cty Bldg.) 78 (2105 Broadway) 175 Garfield (Rifle) 83 Jefferson (Arvada) 68 La Plata (Durango) 70 Larimer (Ft. Collins) 78 (Loveland) 72 Prowers (Lamar) 79 Pueblo (Health Dept.) 92 (Fire Sta.) 89 Rio Blanco (Rangely) 22 Routt (Steamboat Spgs.) 62 San Miguel (Tellόrid 70 Weld (Greeley) 83 I I Primary level exceeded Alert level exceeded 1 1(48 ) 0 Days/Year 10 20 29 ------- NUMBER OF DAYS THAT PRIMARY STANDARD OR ALERT LEVEL WAS EXCEEDED IN 1979 COLORADO CARBON MONOXIDE Days Sampled Days/Year 0 10 County (City or Location ) Adams (Welby) 359 Denver Cob. Blvd.) 364 2105 Broadway) 364 Julian) 259 El Paso (Cob. Spgs.) 363 Jefferson (Arvada) 365 Weld (Greeley) 352 Arapahoe (So. Univ.) 288 ____ Boulder (Boulder) 152 ______ Denver (Julian) 343 _____ Jefferson (Arvada) 353 _____ Primary level exceeded ____ Alert level exceeded 20 30 1 1 (158 ( 80 C 35 OZONE 1 1 30 ------- STATUS AND TRENDS IN COLORADO AIR QUALITY County TSP S02 N02 CO Ox LEAD County TSP S02 N02 CO Ox LEAD Adams Alamosa 45 c:) 1J I pti> Larimer Las Animas E3 Arapahoe Archuleta ,f J,, j ?l.JJ, Logan Mesa Boulder . Moffat Clear Creek Montezuma jjt Delta Montrose Denver Douglas Ir I J 4 3 h 4 J . Morgan Otero c:: Eagle Pitkln El Paso 13 Prowers Fremont Pueblo Garfield Rio Blanco ! Gunnison a Routt Jefferson La Plata San Migoel Weld ! it3rc 0 a/ Status Based on Annual Mean No evidence standard exceeded Exceeds p fmary standard Exceeds alert level Improvement No apparent trend or insufficient data to determine trend Deterioration Only 31 ------- Montana Air Quality There have been few pollution problems in Montana that have shown either an improvement or deterioration. Two of the major improvements have occurred in the city of Missoula and the Anaconda area. Carbon monoxide violations in Missoula dropped drastically during the trend period. Missoula, located in a valley, is particularly susceptible to pollution because of its topography. Sulfur dioxide violations in the Anaconda area decreased substantially although there were 3 alert and 18 primary SO 2 violations in 1979. Lead violations for all 3 quarters of the 3 quarters sampled were observed in Helena. Status of Nonattainment Areas in Montana Rosebud County - This area was changed from nonattainment to unclassified for ozone. No ozone sampling was done in Montana during 1976, 1978 or 1979. Rosebud showed no ozone violations for 290 sampling days in 1977. Colstrip Area - The Rosebud County area is a square approximately 11 miles on a side centered at Colstrip, Montana. This area had been designated nonattairiment for TSP for both 24 hour and annual primary standards. Five sampling sites in the area had no primary violations and only two secondary violations during the 32 days of sampling in 1979. The Ashland site, (the only site sampled in prior years) showed no violation in 1976, 1977 and 1978. 32 ------- City of Columbia Falls The city limits of Columbia Falls constitute this TSP nonattainment area located in Flathead County. This area was designated nonattainment for the primary standard. Fugitive dust from Highway 40 and Nucleus Avenue is the major TSP contributor. These streets will be rebuilt and maintained by the city to alleviate this problem. Even though no daily violations were observed for the 27 samples taken in 1977, there were 5 violations observed in 1978 and in 1979. The total of samples taken was 55 in 1978 and 8 in 1979. City of Missoula - The city limits of Missoula make up the area which is a primary standard nonattainment area f or TSP and CO. A broader area around Missoula has a secondary standard nonattainment designation. The TSP problem can be attributed primarily to dust from unpaved roads. A primary standard violation rate of 7 days in 1977, 16 days in 1978 and 10 days in 1979 was observed during the trend period. Carbon monoxide due primarily to motor vehicles and the air stagnation producing topography of this area (a valley) cause the continuing CO alert and primary standard violation occurrences. Most of the data for 1977 and 1978 was accumulated from the station at Brooks and South Avenue. This station location was moved for part of 1978 and 1979 to a location at Bancroft and Kent. The number of daily violations diminished but there was still one alert and 9 primary violation days for the 136 days sampled at the Bancroft and Kent site. 33 ------- Billings Area - The area bounded by 6th Avenue N on the north, 2nd Avenue S on the south, 25th Street on the east and 33rd Street on the west comprise the nonattainment area designated because of secondary TSP violations. Reentrained dust from paved roads is a major problem. A planned pilot sweeping and flushing program will be started to alleviate the TSP problem. Five stations showed a total of three primary standard violation days in 1979. However, the Central Park site had 36 secondary violation days of the 299 days sampled. No primary violations were noted in 1977 or 1978. Great Falls Area - This area is bounded by 2nd Avenue N on the north, 2nd Avenue S on the south, 10th Street on the east and the Missouri River on the south. It is designated nonattainment for secondary violations of TSP. Windblown particulate matter from street sanding is a major problem. No primary violations were noted in 1978 and 1979 for four stations that sampled 93 and 126 days respectively. Great Falls has recently been made a primary level violation nonattainment area for carbon monoxide. One station was used for sampling CO and this showed four primary level violations out of 94 sampling days in 1979. The years 1977 and 1978 also showed 4 and 10 primary level violations respectively. 34 ------- Butte Area - The northeast section of Butte is currently designated nonattainment for primary TSP violations. Fugitive dust emission violations caused by the open pit mine owned by Anaconda Copper Company and unpaved roads increased dramatically in 1979. Five primary violations days were noted out of 240 days sampled at six stations in 1979. Only two primary standard violations were noted in 1977 and no violations occurred in 1978. These stations were sampled for 44 days in 1977 and 181 days in 1978. East Helena Area The designation of nonattainment for primary level SO 2 violations covers an area of .67km radius around the ASARCO smelter. A 1400 foot square area in the northeast corner of the SO 2 area has been designated a nonattainment TSP area because of secondary standard violations. The ASARCO lead smelter causes the majority of the TSP emission problems. No TSP sampling sites are located in this area but two sampling sites are located in Helena. These sites showed no primary level violations in 1977 thru 1979 but do show a total of seven secondary violations for the 59 days sampled in 1979. A station is set up in Montana City four miles SSE of the ASARCO plant to monitor SO 2 . No violations of the primary standard were shown at this site for 1977 thru 1979 even though there were 290, 183 and 133 days of sampling respectively. Eighty percent of the emissions are from 400 foot stacks, while the remaining 20 percent of the emissions are from 110 foot stacks and subject to down wash. Taller stacks (375 feet) have been suggested as a replacement to the 110 foot stacks to solve down wash problems. 35 ------- Laurel Area An area of 2 km radius around the Cenex Refinery is the area designated nonattainment for primary SO 2 standard violations. The one site used for monitoring showed 10 primary violation days in both 1978 and 1979 down from 33 in 1977. The number of days sampled has decreased over the trend period. Anaconda Area A 6 mile square area centered at the Anaconda Copper smelter constitutes the nonattainment area designated because of SO 2 violations. Violations occur because of excessive emissions from the main stack In the elevated terrain southwest of the plant. Excessive fugitive emissions also occur close to the smelter. Only one site currently has data in the EPA data system for 1979, and shows 18 primary violation days for 335 days sampled by comparison 1978 showed 136 primary violation days at the 10 sampling sites City of Billings - The area bounded by 6th Avenue N on the north, the Burlington Northern tracks on the south, U.S. 87 on the east and Division Street on the west has been designated as nonattainment for carbon monoxide violations. Motor vehicle emissions cause almost all the CO problems. No data was collected in 1979 at any site in Billings. Only one station was used for 1977 and 1978. This showed three daily violations of 276 samples taken in 1977 and no violations for 82 samples taken In 1978. Three major intersections need modifications to help alleviate this problem area. Billings was changed from nonattainment to unclassified for ozone. No ozone data was collected in 1978 or 1979. 36 ------- MONITORING SITES Stations with 75% or more of maximum possible data Stations with less than 75% of maximum possible data ffPI A 37 ------- MONTANA STATIONS USED FOR TRENDS AND/OR STATUS County City or Location Station Number TSP S02 CO L fl Big Horn N.E. of Decker 270060009F03 X Cascade Great Falls 270660015F01 Great Falls 270660009G01 X Great Falls 270660026F01 X Daniels Scobey 270340001F03 X Scobey 270340003F03 X Scobey 270340003F03 X Dawson Lindsay 270360004F03 X Deer Lodge Anaconda-Lincoln 270020007F01 X X Highway Jct 270400004F02 X X Mill Cr Crossing 270400012F02 X Flathead Columbia Falls 270270005F01 X Columbia Falls 270480029F02 X Gallatin Kalispell 270800014F01 X Bozeman 270120001F01 X Jefferson Montana City 270760904F02 X Microwave 270760903F02 X Lake Ronan 270820011F05 X Lewis & Clark Helena 270720001F0]. X Helena 270860002F02 X X Helena 270720001F07 X Lincoln Libby 270900010F01 X Missoula Missoula-Lions Pk 271100019F01 X X X Missoula 271100020G01 X Missoula 271100001G01 X X Missoula 271100015G02 X Missoula 271100016GO2 X Rosebud BN Site 271360027F02 X *Status Only 38 ------- MONTANA STATIONS USED FOR TRENDS AND/OR STATUS County City or Location Station Number TSP S02 CO LEAD Silverbow Butte 270160005F01 X Fisher Butte 271360002F03 X lierney 2714800]5F02 X Butte 270160020F01 Butte 270160017F01 X Butte 270160018F01 X Butte 270160019F0]. X Yellowstone Billings 270080059F01 X Billings 270080007G01 X Billings 270080008G01 X Billings 270080009G01 X Laurel 270840001G02 X X Laurel 270840009F0]. X Laurel 270840009F05 X *Status Only 39 ------- MONTANA STATIONS NOT USED FOR TRENDS AND/OR STATUS - LESS THAN 75% OF MAXIMUM DAYS County City or Location Station Number TSP Big Horn Decker-Warren Ranch 270060009F03 X Lake Poison 270820010F05 X McCone Fort Peck 270980001F03 X Yellowstone Billings 270080006F05 X 40 ------- AIR QUALITY TRENDS BASED ON STANDARD VIOLATIONS MONTANA NONATTAINMENT AREAS Total Suspended Particulates Carbon Monoxide Number Number Days Violation of Days Violation of Nonattainment Area Year Sampled Days Stations Sampled Days Stations Coistrip Area 1977 27 P-O 1 1978 13 P-U 1 1979 32 p-U 5 City of Columbia 1977 27 P3 1 Falls 1978 55 A3/P-5 2 1979 60 A2/P8 1 City of Missoula 1977 365 P-7 8 290 A12/P133 1978 360 A6/P-16 9 150 A21/P-66 2 1979 365 A-1/P-1O 6 136 A-1/P-9 Missoula Area 1977 365 P7 8 1978 360 A-6/P-16 9 1979 365 A-1/P1O 6 Billings Area 1977 60 P-O 4 1978 138 p-U 7 1979 303 P3 5 Great Falls Area 1977 99 Ai/Pi 2 161 P-4 1978 93 P0 4 57 P-lU 1979 126 P-U 4 94 P-4 Butte Area 1977 44 P2 5 1978 131 P-O 8 1979 240 P5 6 A - Alert Violation Days P - Primary Standard Violation Days ------- AIR QUALITY TRENDS BASED ON STANDARD VIOLATIONS MONTANA NONATTAINMENT AREAS Total Suspended Particulates Sulfur Dioxide Carbon Monoxide Number Number Number Days Violation of Days Violation of Days Violation of Nonattainment Area Year Sampled Days Stations Sampled Days Stations Sampled Days Stations East Helena Area 1977 49 p-a 2 290 P0 1 1978 68 p-a 3 183 p-a i 1979 59 P-a 2 133 P-O 1 Laurel Area 1977 191 P33 2 1978 75 A-2/P-14 2 1979 172 P-1O 2 Anaconda Area 1977 365 A8/P28 1 1978 363 A-48/P-136 10 1979 335 A-3/P18 1 City of Billings 1977 226 P3 1978 82 p-a 1979 0 - 0 A - Alert Violation Days P - Primary Standard Violation Days ------- NUMBER OF DAYS THAT PRIMARY STANDARD OR ALERT LEVEL WAS EXCEEDED IN 1979 MONTANA TOTAL SUSPENDED PARTICULATES Days/Year Days Sampled 0 10 County (City or Location ) Flathead (Coltinbia Falls) (Kal Ispell) Lake (Ronan) Lincoln (Libby) Missoula (Lions Park) (Rose Park) Silver Bow (Butte) Deer Lodge Highway Jct.) Anaconda) Mill Cr. Cross) Yellowstone (Laurel) Cascade (Great Falls) Missoula (Lions Park) 60 47 50 57 352 209 239 _______ SULFUR 175 322 186 157 CARBON MONOXIDE 82 132 I U I -J DIOXIDE S I I 20 30 LEAD - VIOLATIONS-QUARTERLY AVERAGE Lewis & Clark (Helena) Quarters Sampled 3 F I Primary level exceeded Alert level exceeded I 43 ------- STATUS AND TRENDS IN AIR QUALITY MONTANA County Big Horn Cascade Daniels Dawson Deer Lodge Flathead Gallatin Jefferson TSP S02 CO LEAD TSP S02 CO LEAD . .E County Lake Lewis and Clark Lincoln McCone Mi ssoul a Rosebud Silver Bow Yellowstone Flo evidence standard exceeded Exceeds primary standard Exceeds alert level Improvement No apparent trend or insufficient data to determine trend Deterioration 0 44 ------- North Dakota Air Quality Total suspended particulates were sampled in 13 counties with no primary ambient air quality standard violations in 1979. Only one station sampled NO 2 and Ozone (Stanton). This site also showed no violations for these pollutants. There are no designated non-attainment areas in the state. 45 ------- NORTH D fA MONITORING SITES Stations with 75% or more of maximum possible data Stations with less than 75% of maximum possible data 46 ------- NORTH DAKOTA STATIONS USED FOR TRENDS AND/OR STATUS County City or Location Station Number TSP NO 2 O, Barnes Valley City 351240001F0]. X Billings Medora 350080001F03 X Bowman Bowman 350160001F01 X Burleigh Bismarck 350100001F01 X Cass Fargo 350400001F01 X Dunn Mandaree 350340001F03 X Grand Forks Grand Forks 350480001F01 X Grant Glen Ullin 350520001F03 X Morton Mandan 35074000].FO1 X Oliver Stanton 350860001F03 X X Richiand Wahpeton 351260001F0]. Stark Dickinson 350300001F01 X Ward Mi not 350780001F01 X Lake Darling 351300001F03 X *Status Only 47 ------- NORTH DAKOTA STATIONS NOT USED FOR TRENDS AND/OR STATUS - LESS THAN 75% OF MAXIMUM DAYS County City or Location Station Number TSP Cass Fargo 350220001F03 X McKenzie Roosevelt Nati Park 35O700002F03 X Mercer Beulah 350760001F01 X Ramsey Devils Lake 35O260001FO1 X Stutsman Jamestown 35O580001FO1 X Williams Williston 351360001FO1 X 48 ------- STATUS AND TRENDS IN AIR QUALITY NORTH DAKOTA County Barnes Billings Bowman Burleigh Cass Dunn Grand Forks Grant McKenzi e McLean TSP Ox t102 Ox 00 No evidence standard exceeded Exceeds primary standard Exceeds alert level Improv nent No apparent trend or insufficient data to determine trend Deterioration TSP County Mercer Morton Ramsey Richard Oliver Stark Stutsman Ward Williams 0 49 ------- South Dakota Air Quality Total suspended particulate (TSP) is the only air pollutant monitored in South Dakota. Seven stations located in the Rapid City area showed 2 alert level and 3 primary level violation days. This is a deterioration from the 1977 and 1978 levels. Status of Nonattainment Areas In South Dakota Rapid City Area - The nonattainment area designated for TSP primary violations is a 10 mile (northsouth) by 11 mile (east-west) rectangular area centered at Rapid City. Most of the violations have been caused by fugitive emissions from quarry operations. Requirements have been adopted for fugitive dust emission controls which should result in attainment by 1982. Seven stations measured three primary and two alert level violation days for 62 days sampled in 1979. This Is higher than in the past. There were three primary violation days in 1977 and one in 1978. 50 ------- SOUTH DAIUIA MONITORING SITES Stations with 75% or more of maximum possible data Stations with less than 75% of maximum possible data 51 0 ------- SOUTH DAKOTA STATIONS USED FOR TRENDS AND/OR STATUS County City or Location Station Number TSP Beadle Huron 430820001F01 X Fall River Hot Springs 430780001F03 X Grant N.E. Big Stone Plant 430640002F02 S.E. Big Stone Plant 430640001F02 Hughes Pierre 431340001F01 X Minnehaha Sioux Falls 431480004F01 X Pennington Rapid City 431380001F01 X Rapid City 431380007F01 X Rapid City 431380002F01 X Rapid City 431380005F01 X Rapid City 431380006F01 X Perkins LelTunon 431320001F03 X Yankton Yankton 431800001F03 X * Status Only 52 ------- SOUTH DAKOTA STATIONS NOT USED FOR TRENDS AND/OR STATUS - LESS THAN 75% OF MAXIMUM DAYS County City or Location Station Number TSP Brookings Brookings 430]40001F01 X Codington Watertown 431760001F01 X Pennington Rapid City 431380009F01 X 53 ------- AIR QUALITY TRENDS BASED ON STANDARD VIOLATIONS SOUTH DAKOTA NONATTAINMENT AREAS Total Suspended Particulates Number Days Violation of Nonattainment Area Year Sampled Days Stations Rapid City Area 1977 53 P3 4 1978 56 P-i 4 1979 62 A2/P3 7 A - Alert Violation Days P Primary Standard Violation Days 54 ------- NUMBER OF DAYS THAT PRIMARY STANDARD OR ALERT LEVEL WAS EXCEEDED IN 1979 SOUTH DAKOTA TOTAL SUSPENDED PARTICULATES Days/Year Days County (City or Location) Sampled 10 20 Pennington (Rapid City) 55 i i Primary level exceeded Alert level exceeded 55 ------- STATUS AND TRENDS IN AIR QUALITY SOUTH DAKOTA County TSP Beadle Brooki ngs Codington Custer Fall River Grant Hughes Minnehaha Pennington Perkins Yankton No evidence standard exceeded Exceeds primary standard Exceeds alert level Improvement No apparent trend or insufficient data to determine trend Det rIoration 56 ------- Utah Air Quality Total suspended particulate violations occurred in 1979 at approximately the same frequency as in 1978 for the counties of Salt Lake, Weber and Utah. Even though the TSP emitted by Kennecott Copper has diminished, U.S. Steel in Orem continues to be the major contributor to TSP pollution in the Wasatch Front Counties. Most of the cities in the Wasatch Front Counties (Davis, Salt Lake, Utah and Weber) still have violations for ozone and carbon monoxide. In most areas no trend was noted for 0 and CO pollution. Both industrial and motor vehicle pollution prevail in this area. Status of Nonattainment Areas in Utah Changes in nonattainment status - The City of Price in Carbon County was changed from a nonattainment area with primary violation status in TSP to an unclassified area. No samples were taken in 1979 but 1978 data showed that the site had not exceeded the primary standard. The nonattainment status of Cedar City in Iron County was changed to unclassified designation. No ozone data from Uintah County was found in the EPA data system for 1977, 1978, or 1979. A nonattainment designation for total suspended particulates has been given to four Utah Counties, Davis, Salt Lake, Utah and Weber Counties. Fugitive dust from unpaved roads and industrial emission sources are the main causes of TSP problems. 57 ------- Davis County City of Bountiful Areas - The only TSP data taken for 1978 and 1979 was at the Bountiful site. Davis County was designated nonattainment for secondary TSP violations. The years 1978 and 1979 showed no primary level TSP violation but each year showed 6 and 18 secondary level violation days respectively for 333 and 334 days sampled. In 1977 one alert level and two primary level violations were noted. Davis County is also a nonattainment area for ozone because of primary level violations. Refineries in the area and motor vehicle emissions are the main causes. The meteorology and topography of the area inhibit dispersion. Mountains are on both sides of this area. The inspection and maintenance program should help reduce both the ozone and carbon monoxide problems in the county. The ozone violation day level has remained relatively constant in the last three years. There have been primary violations of 8, 8 and 10 in 1977 thru 1979 respectively. The City of Bountiful was designated nonattainment for primary level carbon monoxide violations. Again motor vehicles appear to be the primary cause of the CO violations. The three year average of primary violation days is currently slightly less than 4 per year for 1977 thru 1979. This is in comparison with 20 and 23 violation days in 1975 and 1976 at the same site. Salt Lake County - Salt Lake City Areas - The TSP primary and alert level violations that occurred in Salt Lake County were caused by the previously mentioned corruiici regional sources with additional pollution caused by the smelters at the Kennecott Copper Company The number of primary violations have remained the same for 1978 and 1979 (9 violation days each year). This is down considerably from 33 violation days in 1977. 58 ------- Ambient air quality violation of the sulfur dioxide standard have diminished considerably since the construction of the stack at the Kennecott Copper Company smelter near Magna. This was the main cause of the SO 2 violations in Salt Lake County. The primary violation days have decreased in the last four years. They were 120, 30, 17 and four days for 1976 thru 1979 respectively. Salt Lake County ozone problems caused primarily by motor vehicles should be reduced with the implementation of the inspection and maintenance program. The Salt Lake Health Department monitoring site showed three and four primary level violations exceedences in 1978 and 1979. Carbon monoxide violation days for the City of Salt Lake still remain high. They have declined from 54 violation days in 1976 to 16 in 1979. However, there were still two alert level days in 1979. Utah County - Provo Areas - One of the main causes of TSP violations in this area is the U.S. Steel plant west of Orem. Of the three TSP measuring sites located in Utah County, only two primary daily TSP violations were noted. However, all three sites showed violations of the primary annual geometric mean level violations for TSP. 59 ------- The CO site at Provo showed four primary violations in 1979 versus 51, 23 and 7 in 1976, 1977 and 1978 respectively. There has been only one primary ozone violation day In three years at the Provo site under the revised ozone standard. The State of Utah will soon be redesignating Utah County to an unclassified area. Weber County - Ogden Areas - The station at Ogden is the only station used to monitor TSP for Weber County. Primary level daily violations have remained approximately the same for 1977 thru 1979 with three primary and one alert level violation day being noted in 1979. The annual geometric mean has been at the primary violation level for the last four years 19761979. There have been no ozone violations noted for Weber County at the Ogden site for 1977 thru 1979 using the revised ozone standards. The State of Utah will be redesignating these areas to unclassified. Motor vehicle emissions still are a major problem in Ogden. Primary daily ozone violations numbered 12 and 14 in 1978 and 1979. This is down from 75 and 36 ozone violation days in 1976 and 1977. Cedar City Area - Cedar City in Iron County was designated a nonattainment area for SO 2 . The cause was a building burning high sulfur oil for heating. No primary violations occurred in 1979 because of a change to low sulfur fuel in that building. The state implementation plan for this city was approved by EPA. 60 ------- Tooele County Area The East Tooele monitoring site showed no primary level TSP violations in 1978 or 1979. The original cause of violations was the emissions from the copper smelter owned by Kennecott Copper Company. The design change taken by Kennecott has caused this decrease in primary violations. 61 ------- lrrM MONITORING SITES U Stations with 75% or more of maximum possible data Stations with less than 75% of maximum possible data 62 0 ------- UTAH STATIONS USED FOR TRENDS AND/OR STATUS County City or Location Station Number TSP S02 N02 CO Ox LEAD Davis Bountiful 460060001F01 X X X X X Enery Castledale 460280004F02 X X Green River 460280005F02 X Huntington Canyon 460280001K03 X Huntington #2 4602800031(03 X Garfield Escalante 460300002K03 x Henri eville 460300003K03 x Grand Moab 460580002F01 Iron Cedar City 460160002F01 X Kane Glen Canyon 4604000031(03 X Salt Lake Airport (SLC) 460920004F02 X Health Dept (SLC) 460920001F01 X X X X X Magna 460520001F02 X X San Juan Navajo Mt 46O96OO0 .KO3 X Olsato 460960002K03 X Tooele East Tooele 461160001F01 X X Uintah East Vernal 461200001F01 X X X Utah Lindon 461120001F01 X Pleasant Grove 460760001F01 X Provo 460800001F01 X X X X Washington Bloomii gton 461280001K03 X George 4612800021(03 X Weber Ogden 460680001F01 X X X X *Status Only 63 ------- UTAH STATIONS NOT USED FOR TRENDS AND/OR STATUS - LESS THAN 75% OF MAXIMUM DAYS County City or Location Station Number LEAD San Juan Aneth 460960003K03 X 64 ------- AIR QUALITY TRENDS BASED ON STANDARD VIOLATIONS UTAH NONATTAINMENT AREAS Total Suspended Particulates Sulfur Dioxide Ozone Number Number Number Days Violation of Days Violation of Days Violation of Nonattainment Area Year Sampled Days Stations Sampled Days Stations Sampled Days Stations Davis County 1977 334 P2 1 364 P-8 1 1978 333 PO 1 364 A1/P-8 1 1979 334 PO 1 358 P-lU 1 Salt Lake County 1977 365 A-3/P-33 8 361 A-4/P-119 1 355 P-O 1 1978 363 A4/P-9 4 261 A2/P151 3 179 P3 1 1979 364 A-2/P-9 3 263 P-4 2 362 P-4 1 Utah County 1977 365 A4/P19 6 365 PO 2 1978 356 PO 3 352 Pi 2 1979 356 P2 2 363 PO 1 Weber County 1977 350 A1/P3 2 203 PU 1 1978 301 Pi 2 72 PO 1 1979 350 Ai/P3 1 341 pU 1 Cedar City 1977 272 P-li 1 1978 334 P-7 2 1979 334 PO 1 Tooele County 1977 306 P7 1 1978 305 p-U 1 1979 231 PU 1 A - Alert Violation Days P Primary Standard Violation Days U, ------- AIR QUALITY TRENDS BASED ON STANDARD VIOLATIONS UTAH NONATTAI NMENT AREAS Carbon Monoxide Number Days Violation of Nonattainment Atea Year Sampled Days Stations City of Bountiful 1977 228 P7 1 1978 334 P-O 1 1979 334 P-4 1 City of Ogden 1977 341 A-3/P-36 1 1978 349 P12 1 1979 337 P14 1 City of Provo 1977 365 P-23 1 1978 277 P7 1 1979 212 P-4 1 Salt Lake City 1977 359 A-3/P-40 1 1978 352 P18 1 1979 364 A3/P18 1 A - Alert Violation Days P - Primary Standard Violation Days 0i o I ------- NUMBER OF DAYS THAT PRIMARY STANDARD OR ALERT LEVEL WAS EXCEEDED IN 1979 Salt Lake (Magna) UTAH TOTAL SUSPENDED PARTICULATES SULFUR DIOXIDE 328 II CARBON MONOXIDE Davis (Bountiful) Salt Lake (Salt Lake Health Department) Utah (Provo) Weber (Ogden) Davis (Bountiful) Salt Lake (Health Department) OZONE 342 364 214 337 Primary level exceeded Alert level exceeded County (City or Location) Days Sampled Salt Lake Magna) Airport) Health Department) Weber (Ogden) Utah (Provo) 0 Days/Year 10 20 346 294 249 350 337 D I 1 348 362 1 [ I 67 ------- STATUS AND TRENDS IN AIR QUALITY UTAH Counti ia Davis Emery C> c 0 c 0 I Garfield Grand Iron c Salt Lake jja 1Db San Juan Tooele UI ntah Utah ! Wastl ngton Weber * No evidence standard exceeded Exceeds primary standard Exceeds alert level Improvement No apparent trend or insufficient data to determine trend Deterioration 0 68 ------- Wyoming Air Quality The only air pollution monitoring in Wyoming is for total suspended particulates. The nonattainment area for TSP in the Trona industrial area showed no primary level violations. Rock Springs, located 28 miles ENE of this area, did show 2 primary level violations f or TSP. No other TSP primary violations were noted in Wyoming since there were only 8 secondary level TSP violations in all of Wyoming for 1979. Status of Nonattainment Areas in Wyoming Trona Industrial Area A nonattainment area for primary TSP violations was designated for an area 10 miles by 10 miles square centered approximately 28 miles WSW of Rock Springs. No primary level violations were shown for 1977 thru 1979 at the Granger station. An average of 56 days were sampled during each of these three years. 69 ------- Stations with 75% or more of maximum possible data 70 Stations with less than 75% of maximum possible data MONITORING SITES ------- WYOMING STATIONS USED FOR TRENDS AND/OR STATUS County City or Location Station Number TSP Big Horn Lovell 520040001F01 X Campbell Gillette 520280002F01 X Crook Devils Tower 520200002F03 X Fremont Riverton 520600001F01 X Goshen Lingle 520300003F03 X Johnson Southwest of Buffalo 520360001F03 X Laramie Cheyenne 520140001F01 X Platte Wheatland 520830001.FO1 X Sheridan Sheridan 520660002F03 X Sublette Boulder 520680001F03 X Sweetwater Rock Springs 520620001F01 X Rock Springs 520620003F01 X Granger 520680001F03 X Teton Kelly 520720001F03 X *Status Only 71 ------- WYOMING STATIONS NOT USED FOR STATUS AND/OR TRENDS - LESS THAN 75% OF MAXIMUM DAYS County City or Location Station Number TSP Albany Laramie 520400005F03 X Converse Douglas 520220002FO3 X Fremont Lander 520380001F01 X Natrona Casper 520120001F01 X Sweetwater Rock Springs 520620001F01 X Uinta Evanston 52O240001F01 X 72 ------- AIR QUALITY TRENDS BASED ON STANDARD VIOLATIONS WYOMING NONATTAINMENT AREAS Total Suspended Particulates Number Days Violation of Nonattainment Area Year Sampled Days Stations Trona Industrial 1977 58 P-O 1 Area 1978 55 P-O 1 1979 55 p-a 1 A - Alert Violation Days P - Primary Standard Violation Days 73 ------- NUMBER OF DAYS THAT PRIMARY STANDARD OR ALERT LEVEL WAS EXCEEDED IN 1979 WYOMING TOTAL SUSPENDED PARTICULATES Days/Year Days County (City or Location) Sampled 10 20 Sweetwater (Rock Springs) 38 i i Primary, level exceeded Alert level exceeded 74 ------- STATUS AND TRENDS IN AIR QUALITY WYOMING Counti Albany Big Horn Campbell Converse Crook Fremont Goshen Johnson TSP TSP County Laramle Natrona Platte Sheridan Sublette Sweetwater Teton Ulnta No evidence standard exceeded Exceeds primary standard Exceeds alert level Improvement No apparent trend or insufficient data to determine trend Deterioration 75 ------- APPENDIX A National Nnbient Air Quality Standards 76 ------- NATIONAL AMBIENT AIR QUALITY STANDARDS Maximum permissible Pollutant Time period/standard concentration Suspended particulate matter Annual, secondary 60 .zg/m 3 (Total suspended particulates) Annual, primarya 75 tg/m (TSP) 24-hour, secondaryb 150 g/m3C 24hour, primary 260 jg/m3C Sulfur dioxide Annual, primary 80 .ig/m 3 (SO 2 ) 24hour, primary 365 iig/m3C 3-hr, secondary 1300 i. g/m3C Carbon monoxide 1-hr, primary 40 mg/m3C (CO) 8-hr, primary 10 mg/m3C Oxidants/ozone 1hr, primary 235 (O + O or 03) Nitrogen dioxide Annual, primary 100 j g/m 3 (N02) Lead Quarterly, primary 1.5 g/m 3 aprimary: toprotect public health. bSecondary: to protect public welfare. cThese values are not to be exceeded more than once per year. 77 ------- APPENDIX B Breakpoints For Pollutant Standards Index (Includes Alert Level For Each Pollutant) 78 ------- Breakpoints for PSI (4,) in Metric Units PSI TSP SO 2 CO 03 N02 Value g/m 3 ig/m 3 TSPxSO2 mg/rn 3 1 g/m 3 ig/m 3 Breakpoints (4,) 24-hr. 24-hr. ( ig/m 3 ) 2 8 hours 1-hr. 1-hr. 50% of primary short- 50 75 80a b 5.0 118 b term NAAQS Primary short-term NAAQS 100 260 365 b 10.0 235 b Alert Level 200 375 800 65x10 3 17.0 400 1130 ° Warning Level 300 625 1600 261x10 3 34.0 800 2260 Emergency Level 400 875 2100 393x10 3 46.0 1000 3000 Significant Harm Level 500 1000 2620 490x10 3 57.5 1200 3750 aAnnual primary NAAQS. bNo index value reported at concentration levels below those specified by the Alert level criteria. ------- APPENDIX C Procedures Used To Determine Status 80 ------- PROCEDURES USED TO DETERMINE STATUS TOTAL SUSPENDED PARTICULATES County Status 1. Select worst site In each county based on o Number of days per year greater than 260 ig/m 3 o Data available in 1979 (must have greater than 75% of maximum possible data) o Population exposure of site. Should be representa- tive of populated area 2. For the selected site the number of days with a value greater than 260 iig/m 3 for 1979 3. For same site, number of days with at least one value greater than 375 g/m 3 Nonattainment Area Status 1. Select all the sites in each nonattainment area based on o Any sites with a daily value of greater than 260 .ig/m 3 in the county o Any sites with a daily value of greater than 375 .ig/m 3 in the county o Compare violation days at all sites to total days sampled at all sites for the year 81 ------- NITROGEN DIOXIDE County Status 1. Select worst site In each county based on o Highest annual average o Data available in 1979 2. Determine whether annual average is greater than 100 ig/m 3 o Actual data are used o Years without valid annual average are disregarded Nonattainment Area Status 1. Select all the sites in each nonattainment area based on o Any site with an average of greater than 100 ig/m 3 2. Compare the sites with yearly average values of 100 zg/m 3 to the total number of sites sampled for the year. 82 ------- SULFUR DIOXIDE County Status 1. Select site in each county based on o Population exposure. Must be in area where people are present o Representativeness within county o Number of days for 1979 greater than 24-hour average of 365 g/m 3 o Data available in 1979 2. For the selected site, number of days in 1979 greater than primary 24-hour standard for the year o Actual data used o Continuous data preferred over noncontinuous 3. For same site count number of days per year with at least one value greater than 730 3.Lg/m 3 o Actual data used Nonattainment Area Status 1. Select all the sites in each nonattainment area based on o Any sites with a 24hour concentration of greater than 365 ig/m 3 in the county o Any sites with a 24-hour concentration of greater than 730 . g/m 3 in the county 2. Compare violation days at all sites to the total days sampled at all sites for the year 83 ------- OZONE County Status 1. Select worst site in county based on o Number of days greater than 235 pg/rn 3 o Data available for at least one year (19771979) during the months April through September 2. For selected site, count the number of days per year 1977-1979, with at least one hourly value greater than 235 pg/rn 3 o For periods with no data, estimate by examining data from nearby sites and for the same site during same period of other years o Data are insufficient if unavailable during the peak ozone season (April-September) 3. For same site, count number of days with at least one value greater than 400 pg/rn 3 o Actual number is always used Nonattainment Area Status 1. Select all the sites in each nonattainment area based on o Any sites with a day having a 1-hour concentration of greater than 235 pg/rn 3 o Any sites with a day having 1hour concentration of greater than 400 pg/rn 3 2. Compare violation days at all sites to total days sampled at all sites for the year 84 ------- CARBON MONOXIDE County Status 1. Select worst site in each county based on o Number of days greater than 10 mg/rn 3 8-hour average o Data available for 1979 2. For selected site, count the number of days In 1979 wIth at least one 8-hour average greater than 10 mg/rn 3 o For periods with no data estimate by examining data for same site for same period of other years and by looking at data for other nearby sites. 3. For same site count number of days with at least one value greater than 17 mg/rn 3 o Actual number always used Nonattainment Area Status 1. Select all the sites in each nonattainment area based on o Any sites with a day having an 8-hour concentration of greater than 10 mg/rn 3 o Any sites with a day having an 8-hour concentration of greater than 17 mg/rn 3 2. Compare violation days at all sites to total days sampled at all sites for the year 85 ------- LEAD County Status 1. Select the worst site in each county based on o Quarterly average periods greater than 1.5 iig/m 3 o Data available in 1979 2. For selected site, count number of quarters in 1973 with quarterly value of greater than 1.5 g/m Nonattainment Area Status 1. Select all the sites in each nonattainment area based on o Any sites with a quarterly average greater than 1.5 ig/m 3 2. Compare violation quarters at all sites to total quarters sampled at all sites for the year 86 ------- APPENDIX D Nonattainment Area Maps 87 ------- TOrr L... sT1 pENDED PARTICULATES AND CARBON MONOXIDE nonattainment area ------- THREE C. YEAR 2000. PLANN G AREA MAP 89 I I I \ ,r-. 2 - : I \ Lf : \ r c \ ; c -. jr C- I J / - - :- - P 1 I,- t___ - e-- . / r * - ---,-- zz ,% ,J - e p... - --- I - P l.i: : r Li tj9 1_L____ z 1 - ___ 4 - .. r - . I - ., - L ,4 p ,J1 L - - / . I.. ----- - r .i: ic η ___ E JL _ Lt . H - - . I J -S - - 4 Ii E r V - r- - _____ -. %. z : - E1 19: \ DENVER DENVER! BOULDER! LONGMONT (DBL) AREA ------- Z L J k L........ \ I.. 1 L ii .1 :1 _4.. - 7 - I h- ri : ______ , !Ti .( ;.. I - - 7 tt 1 ,1JiI1iUI liii 1 - ----- t I jT F 7 i .r( 1 ) \η! . . . . 1 1 1111 1 r ))II $ /\ r /i -;--- I 0 r :1L .:. . . 11 .- - - i ___ - 1 TW1 TIiIi J, r - ---: - .-- --- . - - 1J i;t 4a -.- - T ll [ rnii- I: η.t A - f -_ -- a - - 1:. L H -P * 1 . Pueblo Nonattainment Area - . URBAN NSPOIATI( V. - __ __ - - - r PLANNING BOUNDARY ------- LAR IMER/ WELD OF COLORADO :T Z T or: PUBLiC HEALTH 4210 EAST 11TH AVENUE. DENVER, COLORADO 80220 . PHONE 388-6111 R. L. CLEERE, M.O.. M.P.M..-OIRICTOR NOTICE In compliance zith the provisions of the Air Pollution Control Act, Section S (1) (C), Session La rs of Colorado, Second Regular Session 1966, NOTICE is hereby given epartnent of Public Health has desi ted the follo ;in le a1ly described area inJ a and W 1 Cou i , State of Colorado, in :hich the a:tbient air standards set forth in Section 4.of the above cited Act are not being met, and in thich the enission stan s sat forth in Section 5 and the penalties prescribed in SectIon 15 of said Act, as amended by Sonate Bill. No. 380, 46th General Asscmbly (1967), shall be in effect as provided therein, to wIt: Coencing at the Northuest corner of SectIon 6, Township 9 North, Range 70 t!est; thence East a1on the section lines approxthately 18 niles to the Northeast corner of Section 1, Township 9 orth, Range 68 !est; thence South along the sattion lines appro:d..ately 6 niles to the Southeast corner of Section 36, Township 9 North, Range 65 West; thence East along the section lines appro i ataly 24 miles to the Northeast corner of Section 1, Township S North, Range 64 West; thence South along the section lines apprcxi. ate1y 48 nilas to the Southeast corner of Section 36, Township 1 orth, Range 64 West; thence West along the section lines approximately 30 miles to the South :est corner of Secticn 31, Township 1 north, Range 68 West; thence North along the section lines approximately 13 miles to the Norchuest corner of Se :ion 6, Township 3 orch, Range 63 West; thence West along the section lines approximately 12 miles to the Southwest corner of Section 31, Township 4 North, Range 70 West; thence North a ong the section lines approximately 36 miles to the point of beginning; Roy, Lη,Cl crc, L.D., M.P.a. Gcor c J,jD :,ir 5 1 , D.D.S. Dircηtor Chairu otV / Colorad3 S atc D. p.:irtmcnt of Air PollucLon Variance Public Uc lr.i Board 91 Datcd 1 ttC(Zt 4, 19G7 ------- MESA I/sea C COLO A O : ::t ;; - 0:: PU L!C (-!rZALT;1 4210 EAST 11TH AVEAUE . DENVE!?, COLOPADO O22O . P/lONE 38e.s6or R. L CL . Cnc M.d).. Af .P /f.. Dl ECTOi7 NOTICE In compliance with thc provisions of Scction 8 (1) (c) of tho Air Pollution Control Act (Ch. 45, Pg. 210, Colorado Session La :s 1966) NOTICE is hereby given that the Division of Ad iinistratjon of the Colorado State D2partmenc of Public Health has enlarged the area comprising the air pollution basin in Nesa County to incltde additional territory an has c1esi natecj the following Legally described area of }!csa County, Colorado in which the ambient air standards set forth in Section 4 of the above cited Act are not being ract, and in wtich the emission standards sct forth in Section 5 of said Act, shall be in effect as provided therein, to wit: Cor uencin at the Northeast Corner of Section 34.Towr ship 10 South, Range 98 west; thence South along the section line approximately I mile to the Southeast Corner of Section 34, Township 1.0 South, Range 98 West; thence East alon; the section line approximately 400 feat to the Northeast Co cr of Section 2, Township 11 South, Range 98 West; thence South along the section lines approximately 2.4 miles to the Southeast Corna: of Section 11, Township 11 South, Range 98 1cst; thence West along the section line a pro.:i- mately 2000 feet to a point where such line intersects the Eastern bounIary of Section 1, Township I South, Range 2 East; thence South along the section lines approxi at ly 6 miles and 3800 fcct to th uθhcast Corner of Sc ctjon I, Township 2 South, Rar;c 2 East; thence !cst along the Scction linc approxirilately 11 miles to the Southwest Corner f Section 5, To znshLp 2 South, Range 1 East; thence North along the sCction line appro:imaccly 1 mile to the North cct Corncr of Scccion 5, Township 2 South, R&nge 1. East; rhcnc Wesr. along the section lines approxi- mately 5 and /4 mi1c to thc. point where said line intcrsccts thc rast boundary of the Coloralo National Honumcnt Park; thence fl a orth csterly direction along the boundary line of saiJ Iark to the Northt: st Corner of SectIon 31, Tot:n:hip I North, 1 an e 2 lest; thence North -92 ------- along thc section line approxim.2tely 1 milc to the Southwest Corner of Scction 19) Tocmship 1 ? orth, R tnge 2 Jest; thcnce West along the section linc approximately 1 mile to the Southucst Coincr of Section 24, .To n hip 1 North, Range 3 Vest; thence North along the section line approx atcly 1 mile to the Sotithtzest Corner of Section 13, Township 1 North, Range 3 1cst; thence Uest along the section lines approxit ate 1y 2 miles to the Southwest Corner of Section 15, Tounship 1 North, RanCC 3 Ucsc; thence North along thc section lines approximately 3 miles to the Nortlit;cst Cor cr of Section 3, To znship I north, Range 3 West; thence East along the section lines approx mate1y 11 n.iles to the Northeast Corner of Section 5, To .-nship 1 North, Range 1 West; thence South along the section lines approximately 2 miles to the Northeast Corner of Section 17, Township 1 North, Range 1 West; thence East along the section line appro :imataIy 1 mile to the Northeast Corner of Section 16, Township 1 North, Range 1. Was ; thence South along the section line approximately I mile to the Southeast Corner of Section 16, To nship I. North, Range 1 West; thence East along the Section lines appro,:imatci.y 15 miles to the point of beginning, all in Mesa County, Colorado. _ / __ __ Roy L.(/learc, Z1.D., U.P.H. George D 1 c, D.D.S. Director Chairman Colorado State Deparcmcnt of Air Pollution Vaciancc Public health Board Dated 3une 9, 1966 93 ------- MISSOULA PRIMARY TSP NONATTAINMENT AREA Missoula City Limits PAQCR 144 J.. S g4 ------- . p . . II H 1. .twIIs,. 4 c & \; .M-- \: \ S IJ U, U 41... 3.. Cu k - A I . I 4, F , ,. S. a NON .ATTAI NMENT AREA Sections - Sections 35, 36 1, 2, 12, . . i ,-. 7 I I G 4.. ....: 4.... .0 1.I 4 ... - - -.. 1 L _Jf -. _________ : . j . ,1) / I I . MISSOULA ...4 4. 474 j . .114, I L/ (t4\ t SECONDARY TSP . i..1 c. . ,J, T& I I .. , . 1 . .. . R2OW,T14N I .,va - . 1 Si, / i R2OW, T13N g 1 I I / 35,36 . .. ..- .. . R2OW, T12N - Sections 1, 2 AQCR 144 r A \ 1 ) .i, s - I Al tiir P ° . - __ rt t 4 y . . A /, 71 IN a . . rffl .qt . . J P .j .. 31 . Po. t a. : -- MOUNt . 21 I . .. , MNIP4ft n . , . . pA) t i # Cv,e O4 . a . , Sections 6-9, 11, 14-23, 26-34 Sections 4, 5, 6 Ui. .. 1 .. a L. It ILACE MO $9 11 I ( \ I ,t 4- .. 5:;zj w. , __ ------- lJe. MISSOULA Co NON-ATTAINMENT ATREA a City Limits AQCR 144 96 ------- L(GIND paIplil. a,.. aaUIS M IS SUSIS U IS Satati S. STS.t mm IS. ,C I vm* 5v$ aSmS NVIS 5555 im..1 , m .ma . a.p.,s its, tS(S 5.5 *I( .$*5 ( $,,US 151.51 *4 P 5 , 5* 5 , ITSIIIS 1 (51 1 11 6s 5 * (C*NSP5V SISTIN smtmsIeTt ussia 1 51 ( 1 em mescams movc( .55.15 S.*I P5 551 5*55 (5 55*15 *5551 .5as(U 5..p0a 1( IsI*5*5 , 1.55 .S ..1*.ITlmS *55.1*115 s I5 ((* 15*1 5*5,55*1 SeSI SICT 5aS$ . (auS$ 1 10 55.5*551 m*e ..a. ass 5u*v lIST 511111 (I v ., 1011 S 1e(.Thav 11*451 1*4, 55 . 551 P 5* 1 1 151 (LIVA h IN Cop... 1 #1.1 asp s s avoilobi. l o u s lull II l . t flM.)ll5 Dspo. .s . I i) M .a uiiu 9oOl 1105 5 505 C I I I PtIT COLUMBIA FALLS FLATHEAD COUNTY MONTANA 510 CINIuS 5.555 COLUMBIA FALLS TSP NON-ATTAINMENT AREA CITY LIMITS OF COLUMBIA FALLS AQCR 144 lΰ I a. S K ee to s, 51*15 .5 VUT 500 1 (5 lP00 ------- COLSTRIP TSP NON-ATTAINMENT AREA AQCR 143 A N Boundaries - VTM coordinates as indicated. 98 ------- : I .. ]cLC r: T\ J. Ψ \# I I I / I 0 s__-j--i : i ii - 01 S ° ./ a ___ I - - __ 7/ __ ____ __ __ r ; Vc I j H __ 4 . .. + - __ + H - - 4HT . 4 f ic Ii I. .. --i I7 _ _4 Th -- U . U U d I L II E ff- . a i. 1 I U I - £DI aCT ,as . I ) GREAT FALLS TSP NON-ATTAINMENT AREA GREAT FALLS CBD 1i-- &4 U j North Boundary East Boundary South Boundary West Boundary 99 2nd Ave. N. 10th Street 2nd Ave. S. Missouri River AQCR 141 ------- F I 1 *ILNU*U MA1 POST OF?ICE COURT HOUSE ELEMENTARY HIGH SCHOOL HOSPITAL ELEVATION a + x TIN&StR25& 26 BILLINGS Co NON-ATTAINMENT AREP North Boundary 6th Aye, N. East Boundary US 87/312 South Boundary SN Tracks West Boundary Division SI AQCR 140 CITY PLAT BILLIN( 100 YELLOW TONE CO MONTAN? i Is ------- K , . h..__, S x 1$) .. i. ,I.. I 4 I .I (p .1 l I s . . S ...S .t S . 1P ? ,. . tqbt κ :. N I I N a S 25 a Z6 BILLINGS TSP NON-ATTAINMENT AREA DOWNTOWN REDEVELOPMENT AREA N Boundary - at* E Boundary - S Boundary - W Boundary - 6th Ave. Io. 25th Street 2nd Ave. So. 33rd .$treet/Di vision AQCR 140 CITY PLAT BILLIN( YELLOWSTONE CC C Is I I ] O1 ------- ; 36 J I. S LAUREL \ / L ___- L . _____ __ Lc : ) I T I i . 6 JT s S , ,. J : IS. 5 5 5 q #r, _____ _______ _____ - D I C/(7fl 25( __ - - . J < Nd LAUREL SO 2 NON-ATTAINMENT AREA 2.0 km Radium Around Cenex Refinery (Point A) 102 AQCR 140 ------- 4. N N N N C L N N1! / ?2$ N N N N N N NN T .N1 t N N14 NJs4 J Y N N N jj 4 \ N N N VN N . N f\ \/\ 1 / : .. , * 1 t / , - Butt : .. I a SUSLiNG ___ 4 . 4? - Casek . , I ii ___ : t It ___ - . / Gulch ButteTSP . NonattainiTlent Area ( . - l, _ North Boundary T 34 N 4., L!t - -:: . , η East Boundary 1-15/US 91 L £ South Boundary i gO,15/US 91 -. _______ - West Boundary 190,15 Business . - Loop, Main St.,. - City Limits ,.. : :*_ I. I I. p , AQCR 142 - :: 28 29 , . t:1... .. if \ .-- - -_ _______ _ - -. - - - r - .: ,a. .. ..4 - - - - - ,__- --- --- -- - - l I - -. . 1!? ::l : L:. :E !iS !l - r . s ; F 103 ------- stc s ii.T i-s FO £N RGLMIN1 OF 9.sS £01 5 I _ ._.M/ I ,j $*< f 4( i (,1 ANACONDA SO 2 NON-ATTAINMENT AREA ANACONDA SMELTER - POINT A AQCR 142 104 4 - 1 _ tV _ _ j. _ P 30 ____ - - 1 . / ,,: v . c!i ti_ - .. - f,. .. e.--.-. p. d - J ?, I ____ _sf J _ . . I 117; L .ANAC DA PO9 .% 9 - ... -I - . - X $1! tt! i -s c. .s t 9- r n .ibF 7-. - ( A I b $ -) 4 4 j x/ . \Nic 1;4f - - e k ! r 4 I I I , , &flv V! _ _J , 4 ot I 4 3 7*P - 3 H / _____Pt, I I ------- EAST HELENA S02 NON-ATTAINMENT AREA 0.67 Km Radius.Around Smelter AQCR 142 COΨS sI 4 s so o.s oi,oJobl. loo SO.M& cosi .MoMoψo Uposim.4 ii HlghsoysHthno. Mos.omo 59o01 = - -- ._ . .ITYI7D S P1w) . -_ = .ao.sus moss 1515(5 L I I MASNLS 50*5 ;m ( II ,s.s( moss Is pP( lItwW.5OUS 00* 5 aves ass v,osi Os .. . msvcsc ov Us ( 6 QI 1 SWast 5* 5 uCom.u, uvsico ImIlsItatI ISv ( 555 5(5 W I uuwLIm(S LIJIt 550 .1 . $w ( mOves s .sa 5 onism m ng s.os cs .rsm .,E QtjIlIOv NI *5* ISSISL Ill 155(011*11 S III : : : sm-(u.$I(51 55(51(5 1155(5 ISP 15(m& *4 P0* 5* 51 155515 I clutlAs 551*5511 1*11011 , 4 5 S... 55 5PISL (1151* IllS LIt? PLAY EAST HELENA LEWIS a CtJ RK COUNTY MONTANA 517(5 CtNSUS 1,05* SLAtS ak *5(5 s o s 0 SO *00 N N 4 U I S tu. L T:TTitTii t* 159J L __ I I- I 0 0 Ge NO N 5055* 1 10(0110. M &Iv Lu. SI*,lslS A P 5$? SIPaCS £ (Sum NOv51 T ION IIIN10I*O* 1(1*051 OZS)W 51111 5(1155*. l(v IIS D l i. * I 5PI ------- EAS.T HELENA TSP NON-ATTAINMENT AREA AQCR 142 CoΨ.s .1 es mOD 010 .!.0I$Obl. of. .ommol t .a uh. MoIψsds ii HIOhWQV,HShII Mooi. .e 39601 pqo.uws oo* OhI!P £10 SU*iDf Sof SMIVR I $1O ( s*p IO tIp( SI iN % qOI IvI 10* 1 01*10(1 00*0. ,sIr,c II . cts*o. aio.oqa ,aq vsr ( ViK0$i 1* P*lM*I s s,l. as (!iO I C 01 NO 0(0(5*1 *00 5(6015*5, s,s to l IVE SIUV( U,.o,E V*0a(I Ill *110(515 ls%.y ISSuIS I* ,t utI ***OR fs.%l0 SOlVE 5*5*10 c 1e :55,5 (INS N01.Iul$l(N ofSlCaP I 000(1 ? CtNl.M 01115(5 1 .S?SlC? 5SII (*0(55001 ssoms*1, 5*1100* . £i, 5 ,5 ,005 st ,ict cow ., so I 1 (0(NT&SV 5C 100S ( a ... x I... 00 0 10 1 51 (((v*1s0 5 S N CITs 0 1 * 1 EAST HELENA LEWIS & CLARK COUNTY MONTANA 070 C( uS I,S I IdlE is iit 5 .0 0 Q 0 N S N I EJr1TTii [ JL] JEEJ: 1E L] Is cD 0 0 * m 0(5 ,010 III 0. .l ------- L i1: I: Lj.i.._.. I - Rapid City Nonattainment Area S ,I. f J - ,%/ V ____ ;: t: +=: : ; T 4 -:: . - . \ 7 It 4a TgL J: fl/ = 01 I- $ - .}-. i %4g1 t..... v-..i ? .rkJ I i 4 -vt4. _ HM κ% t rr 2 . .__ J __ Scbaefe - b4c. RAP D CI;i it ; H T ;. :: Jiy U WIIdc ,Z SI $ t I C , h4g t 4 -- : : . .T\1% . __________________ UI 1 J - bJ E. s s b η 11 -ηj -- - Via.i1 .P,- - __& __.,_ t. S Commis P . 1 .4 I : :- ( - 2 L4 L / -_ __fqM,m. P7 ,i --wi% . j: ii: .1Sc/; II r \1 S \ \, \\ - H . N 5- L .4 _S/ l w i-f--... .. 79 - .: - > . t 5- Ψ .? S-S !Jfi . D v i - ---; ---.--I------- ? -.- - -. 5 ;.: _.L. __ 5_ 5 _ _ 5_ S S t SS - 5- J: -- - __) . 5 5 u.k i t#t Stack GliP) L :1! - Cr l [ 1 , - $flv.r s.ivd l( 4 jdHu ..J ( I L Pir Grov (7 . ii - r :i 1k 1 __ ηc T*t t 1d 1 H sr*?rneyI I, !! C . s v - 1> 5/, 5-55_55 5-5- 55 55 o Potato Buffs z ,, 1u. 5 i . (}I I ( : 5 / I- , .4 .55 -. 55) I , 1 - - 1.. 5 1 i r : j . . - - .5 1 ti. 4 .:: ,.0 , -.5 S., r -1 : 11 5 ,. 107 ------- Approximate Over fl Boundary of Non attainment Areas Trona Industrial Nonattainment Area SWEETWATER COUNTY ------- TECHNICAL REPORT DATA (Please read Instructions on the reverse before completing) 2 3 RECIPIENTS ACCESSION NO REGION VIII (1979 Data) Protection Agency 5 REPORT DATE September 1980 6. PERFORMING ORGANIZATION CODE A. Entzminger, Stephen C. Bell 8 PERFORMING ORGANIZATION REPORT NO NAME AND ADDRESS Protection Agency Analysis Division 10 PROGRAM ELEMENT NO 11 CONTRACT/GRANTNO AND ADDRESS 13 TYPE OF REPORT AND PERIOD COVERED Final 14 SPONSORING AGENCY CODE and status for the calendar year 1979 were determined Region VIII. These states include Colorado, Montana, Dakota, Utah and Wyoming. Data resident in the SAROAD analyzed. which detect significant differences between two utilized to identify trends. The status and severity of air as a direct measure of air quality standard and alert The report includes a summary of air quality in each KEY WORDS AND DOCUMENT ANALYSIS b IDENTIFIERS/OPEN ENDED TERMS C. COSATI E IeId/GrOUp Colorado SAROAD Montana North Dakota South Dakota Utah Wyoming 19 SECURITY CLASS (This Report) Unclassified 21 NO OF PAGES 109 20 SECURITY CLASS (This page) Unclassified 22 PRICE EPA Form 22201 (Rev. 477) PREVIOUS EDITION IS OBSOLETE 109 ------- |