Center for Spatial Studies, University of Redlands 20021030 vector digital data https://wildlife.ca.gov/Data/BIOS https://filelib.wildlife.ca.gov/Public/BDB/GIS/BIOS/Public_Datasets/300_399/ds391.zip The California Air Resources Board (ARB) compiles air quality data from monitoring stations throughout California. This dataset represents the Annual average of the maximum 1-hour daily measurements (ppm) for the years 1990 and 1999. The data are used to evaluate the nature and severity of the air quality problems in the state and to assess air quality trends. This data was used to display air quality data in the Salton Sea Atlas (ESRI Press). This data is made available in tabular form by the California Air Resources Board. This tabular data has been enhanced with geospatial data by joining it to existing air basin data layers. 19800101 unknown ground condition Complete None planned -124.253477 -113.954131 41.908281 32.497612 None PM10 air quality particulate matter ISO 19115 Topic Category environment None California None Disclaimer: The State makes no claims, promises, or guarantees about the accuracy, completeness, reliability, or adequacy of these data and expressly disclaims liability for errors and omissions in these data. No warranty of any kind, implied, expressed, or statutory, including but not limited to the warranties of non-infringement of third party rights, title, merchantability, fitness for a particular purpose, and freedom from computer virus, is given with respect to these data. Center for Spatial Studies, University of Redlands Lisa Benvenuti unknown US 909-748-8372 lisa_benvenuti@redlands.edu Redlands Institute, University of Redlands California Environmental Protection Agency, California Air Resources Board none Unclassified none Microsoft Windows Vista Version 6.1 (Build 7601) Service Pack 1; ESRI ArcCatalog 9.3.1.4095 The data set was checked for topological consistency using the Arc/INFO command BUILD. Polygon topology present. The data set has no generalization, and no data was intentionally omitted. There were no entries for NO2, and SO2 in GBV. Stations listed as 0 for every year represent station for which there were no entries in the CAAQD cd Estimated to be +/- 160 feet California Environmental Protection Agency, Air Resources Board unknown 100000 CD-ROM CARB Data downloaded by Redlands Institute, University of Redlands staff from online linkage. Unzipped and imported, if necessary. Projection checked against project standards and reprojected if needed. Topology and attributes QC'd. R:\DTP\gis\soc\airqual\stations\ca\no2\metadata.xml Redlands Institute, University of Redlands Lisa Lewis mailing and physical

1200 E. Colton Ave.

Redlands CA 92373 US 909-335-5268 909-307-6952 Vector Entity point 750 NAD 1983 California Teale Albers 34.0 40.5 -120.0 0.0 0.0 -4000000.0 coordinate pair 0.0001 0.0001 meter D North American 1983 GRS 1980 6378137.0 298.257222101 ds391 Z999 Annual average of the maximum 1-hour daily measurements in parts per million for 1990 OBJECTID Internal feature number. Esri Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. N1 unknown SITE_NAME unknown Z990 Site Name Z990_M Annual average of the maximum 1-hour daily measurements in parts per million for 1999 Z999_M unknown PM10_ unknown PM10_ID POLYGONID SCALE ANGLE Redlands Institute, University of Redlands Davenport, Frank Research Analyst mailing and physical

1200 E. Colton Ave

Redlands CA 92373 US (909) 335-5268 (909) 307-6952 none 20220114 Center for Spatial Studies, University of Redlands Lisa Benvenuti unknown US 909-748-8372 lisa_benvenuti@redlands.edu FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 local time none Unclassified none