SERA
United States
Environmental
Protection
Office of Air Quality Planning and Standards
Information Transfer and Program Integration Division
Information Management Group
AQS Data Dictionary
VERSION 2.23
Date Revised: March 15, 2010
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AQS DATA DICTIONARY
Version 2.23
March 15, 2010
Preparedfor
U.S. ENVIRONMENTAL PROTECTION AGENCY
OFFICE OF AIR QUALITY PLANNING AND STANDARDS
INFORMATION TRANSFER AND PROGRAM INTEGRATION DIVISION
INFORMATION MANAGEMENT GROUP
RESEARCH TRIANGLE PARK, NC 27711
Prepared by
2605 Meridian Parkway, Suite 100
Durham, North Carolina 27713
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Table of Contents
1 Introduction 1-1
1.1 AQS Documentation 1-1
1.2 About This Book 1-1
1.3 About AQS 1-2
2 Description of Terms 2-1
2.1 Concepts 2-1
2.2 Definitions 2-3
2.3 Data Model 2-12
3 AQS Views 3-1
AQS Site Views 3-1
3.1 Sites 3-1
3.2 T angent Roads 3-3
3.3 Open Paths 3-3
3.4 Primary Monitor Periods 3-4
AQS Monitor Views 3-5
3.5 Monitors 3-5
3.6 Monitor Pollutant Areas 3-6
3.7 Sample Periods 3-6
3.8 Monitor Type Assignments 3-7
3.9 Monitor Agency Roles 3-7
3.10 Monitor Objectives 3-8
3.11 Required Collection Frequencies 3-8
3.12 Sample Schedules 3-10
3.13 Monitor Tangent Roads 3-10
3.14 Probe Obstructions 3-11
3.15 Monitor Regulatory Compliances 3-11
3.16 Monitor Collocation Periods 3-12
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3.17 Monitor Protocols 3-12
AQS Pollutant Data Views 3-14
3.18 Composite Data 3-14
3.19 Composite Qualifier Details 3-15
3.20 Raw Data 3-16
3.21 Raw Qualifier Details 3-17
3.22 Precision Data 3-18
3.23 Accuracy Data 3-19
3.24 Blanks Data 3-20
3.25 Blanks Qualifier Details 3-20
3.26 Comments 3-20
AQS Pollutant Summary Views 3-22
3.27 NAAQS Averages 3-22
3.28 Daily Summaries 3-22
3.29 Quarterly Summaries 3-23
3.30 Annual Summaries 3-24
3.31 Site Daily Values 3-26
3.32 Site Quarterly Summaries 3-26
3.33 Site Annual Summaries 3-27
3.34 Site Design Values 3-28
3.35 Summary Maximums 3-29
3.36 Summary Percentiles 3-29
3.37 Summary Protocol s 3-30
3.38 Monitor Precision Summaries 3-30
3.39 Precision Summary Protocols 3-31
3.40 Reporting Organization Precision Summaries 3-31
3.41 Monitor Accuracy Summaries 3-33
3.42 Accuracy Summary Protocols 3-33
3.43 Reporting Organization Accuracy Summaries 3-35
4 AQS Data Fields 4-1
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4.1 98th Percentile Completeness Indicator (Annual) 4-1
4.2 Accuracy Audit ID Number 4-1
4.3 Accuracy Date 4-2
4.4 Accuracy Type 4-3
4.5 Action Date 4-4
4.6 Action Indicator 4-5
4.7 Action Reason 4-6
4.8 Action Type 4-7
4.9 Actual Method 4-8
4.10 Actual Value 4-9
4.11 Agency Code 4-10
4.12 Agency Performing FRM Audit 4-11
4.13 Agency Role Begin Date 4-12
4.14 Agency Role End Date 4-13
4.15 Agency Role Name 4-14
4.16 Alternate Method Detectable Limit 4-15
4.17 Applicable NAAQS Indicator 4-16
4.18 AQCR 4-17
4.19 AQI Value 4-18
4.20 Arithmetic Mean (Annual) 4-20
4.21 Arithmetic Mean (Daily) 4-23
4.22 Arithmetic Mean (NAAQS) 4-24
4.23 Arithmetic Mean (Quarterly) 4-31
4.24 Arithmetic Standard Deviation 4-33
4.25 Audit Class 4-35
4.26 Audit Level 4-36
4.27 Audit Sample ID 4-37
4.28 Audit Scale 4-38
4.29 Audit Scheduled 4-39
4.30 Audit Type 4-40
4.31 Beam Length 4-41
4.32 Blank Date 4-42
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4.33 Blank Date/Time 4-43
4.34 Blank Scale 4-44
4.35 Blank Time 4-45
4.36 Blank Type 4-46
4.37 Blank Value 4-47
4.38 CBSA Represented 4-48
4.39 Census Block 4-49
4.40 Census Block Group 4-50
4.41 Census Tract 4-51
4.42 Certification Indicator 4-52
4.43 City Code 4-53
4.44 Class I Area 4-54
4.45 Close Date 4-54
4.46 CMS A Represented 4-55
4.47 Collection Date 4-56
4.48 Collection Frequency Code 4-57
4.49 Collocated POC 4-58
4.50 Collocation Begin Date 4-59
4.51 Collocation End Date 4-60
4.52 Comment Text 4-61
4.53 Community Monitoring Zone 4-62
4.54 Compliance Date 4-63
4.55 Compliance Indicator 4-64
4.56 Composite Period 4-65
4.57 Composite Type 4-66
4.58 Composite Year 4-67
4.59 Congressional District 4-68
4.60 Count of Accuracy Audits (Monitor Accuracy Summary) 4-69
4.61 Count of Accuracy Audits (Reporting Organization Accuracy Summary) 4-70
4.62 Count of Analyzers 4-71
4.63 Count of Collocated Sites 4-72
4.64 Count of Creditable Samples 4-73
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4.65 Count of Exceptional Events 4-74
4.66 Count of Days Greater Than Alert Level 4-75
4.67 Count of Half-MDL Substitutions 4-76
4.68 Count of Methods 4-77
4.69 Count of Missing Days Assumed Less Than Standard 4-78
4.70 Count of Non-Overlapping Exceedances (Annual) 4-80
4.71 Count of Non-Overlapping Exceedances (Daily) 4-81
4.72 Count of Null Data Values 4-82
4.73 Count of Observations (Annual) 4-83
4.74 Count of Observations (Daily) 4-84
4.75 Count of Observations (Quarterly) 4-85
4.76 Count of Precision Checks (Monitor Precision Summary) 4-86
4.77 Count of Precision Checks (Reporting Organization Precision Summary) 4-87
4.78 Count of Primary Exceedances (Annual) 4-88
4.79 Count of Primary Exceedances (Daily) 4-90
4.80 Count of Required Days 4-92
4.81 Count of Secondary Exceedances (Annual) 4-93
4.82 Count of Secondary Exceedances (Daily) 4-95
4.83 Count of Valid Collocated Data Pairs (Monitor Precision Summary) 4-97
4.84 Count of Valid Collocated Data Pairs (Reporting Organization Precision Summary).. 4-99
4.85 Count of Valid Days 4-101
4.86 County Code 4-103
4.87 Created Date 4-104
4.88 Created User 4-105
4.89 CSA Represented 4-106
4.90 Daily Rank 4-107
4.91 Daily Value 4-108
4.92 Date Sampling Began 4-109
4.93 Date Sampling Ended 4-110
4.94 Date Site Established 4-111
4.95 Date Site Terminated 4-112
4.96 Design Validity Indicator (24 Hr) 4-113
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4.97 Design Validity Indicator (Annual) 4-114
4.98 Design Value (241 Ir) 4-116
4.99 Design Value (Annual) 4-117
4.100 Direct Entry Indicator 4-118
4.101 Direction from Central Business District to Site 4-119
4.102 Direction from Monitor to Probe Obstruction 4-120
4.103 Direction from Receiver to Transmitter 4-121
4.104 Direction from Site to Street 4-122
4.105 Direction to Meteorological Site 4-123
4.106 Distance from Central Business District to Site 4-124
4.107 Distance from Monitor to Probe Obstruction 4-125
4.108 Distance from Monitor to Tangent Road 4-126
4.109 Distance from Primary Sampler 4-127
4.110 Distance to Meteorological Site 4-128
4.111 Dominant Source 4-129
4.112 Duration Code 4-130
4.113 A Region Concurrence Indicator 4-131
4.114 EPA Region Evaluation Date 4-132
4.115 Estimate of Days Greater Than Standard 4-133
4.116 Exceptional Data Type ID 4-136
4.117 Exclusion Date 4-139
4.118 Exclusion Indicator 4-140
4.119 Expiration Date 4-141
4.120 Freeze Indicator 4-142
4.121 Geometric Mean 4-143
4.122 Geometric Standard Deviation 4-144
4.123 Geometric Type 4-146
4.124 Half MDL Substitution Indicator 4-147
4.125 Height of Receiver 4-148
4.126 Height of Transmitter 4-149
4.127 Horizontal Accuracy 4-150
4.128 Horizontal Collection Method 4-152
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4.129 Hour of Maximum Value 4-153
4.130 HQ Evaluation Date 4-154
4.131 Indicated Method 4-155
4.132 Indicated Value 4-156
4.133 Land Use Type 4-157
4.134 Land Use Under Path 4-158
4.135 Last Post Date 4-159
4.136 Last Sampling Date 4-160
4.137 Local Primary Standard 4-161
4.138 Local Region 4-162
4.139 Local Site ID 4-163
4.140 Local Site Name 4-164
4.141 Location Setting 4-165
4.142 Lower Probability/Confidence Limit (Reporting Organization Accuracy Summary) 4-166
4.143 Lower Probability/Confidence Limit (Reporting Organization Precision Summary). 4-168
4.144 Maximum Beam Height 4-170
4.145 Maximum Indicator 4-171
4.146 Maximum Level 4-172
4.147 Maximum Value (Annual) 4-173
4.148 Maximum Value (and Second Highest through Fifth Highest) 4-175
4.149 Maximum Value (and Second Highest through Fourth Highest) 4-176
4.150 Maximum Value (Daily) 4-177
4.151 Maximum Value Date 4-178
4.152 Maximum Value Date of Second Highest 4-179
4.153 Maximum Value Date/Time 4-180
4.154 Maximum Value Time 4-181
4.155 Maximum Value Date of Second Highest 4-182
4.156 Mean (Monitor Accuracy Summary) 4-183
4.157 Mean (Monitor Precision Summary) 4-184
4.158 Mean (Reporting Organization Accuracy Summary) 4-186
4.159 Mean (Reporting Organization Precision Summary) 4-187
4.160 Mean Completeness Indicator (Annual) 4-189
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4.161 Measurement Scale 4-190
4.162 Meteorological Site ID 4-191
4.163 Meteorological Site Type 4-192
4.164 Method Code 4-193
4.165 Minimum Beam Height 4-194
4.166 Minimum Collection Frequency 4-195
4.167 Minimum Sample Value 4-196
4.168 Modified Date 4-197
4.169 Modified User 4-198
4.170 Monitor ID 4-199
4.171 Monitor Objective Type 4-201
4.172 Monitor Protocol ID 4-202
4.173 Monitor Protocol ID (Annual) 4-203
4.174 Monitor Protocol ID (Monitor Accuracy Summary) 4-204
4.175 Monitor Protocol ID (Monitor Precision Summary) 4-205
4.176 Monitor Type 4-206
4.177 Monitor Type Begin Date 4-207
4.178 Monitor Type End Date 4-208
4.179 Monthly Required Collection Frequency 4-209
4.180 MSA Represented 4-210
4.181 NAAQS Date/Time 4-211
4.182 Null Data Code 4-212
4.183 Number of Samples 4-213
4.184 Open Path Number 4-214
4.185 Parameter 4-215
4.186 Percent Difference 4-216
4.187 Percent of Observations (Annual) 4-218
4.188 Percent of Observations (Daily) 4-221
4.189 Percent of Observations (Quarterly) 4-222
4.190 Percentile 4-226
4.191 Percentile Sample Value 4-227
4.192 POC 4-231
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4.193 Pollutant Area Code 4-232
4.194 Pollutant Area Type 4-233
4.195 Precision Class 4-234
4.196 Precision Date 4-235
4.197 Precision ID 4-236
4.198 Precision Sample ID 4-237
4.199 Precision Scale 4-238
4.200 Primary Monitor Begin Date 4-239
4.201 Primary Monitor End Date 4-240
4.202 Primary POC 4-241
4.203 Primary Qualifier Code 4-242
4.204 Primary Qualifier Type 4-243
4.205 Primary Sampler Indicator 4-244
4.206 Primary Sampler Monitor ID 4-245
4.207 Probe Height 4-246
4.208 Probe Horizontal Distance 4-247
4.209 Probe Location 4-248
4.210 Probe Obstruction Height 4-249
4.211 Probe Obstruction Type 4-250
4.212 Probe Vertical Distance 4-251
4.213 Project Class 4-252
4.214 Qualifier Code 4-253
4.215 Quarter Represented 4-254
4.216 Recording Mode 4-255
4.217 Reference Point 4-256
4.218 Regulation Code 4-257
4.219 Reported Sample Value 4-258
4.220 Reported Scale 4-259
4.221 Reported Unit 4-260
4.222 Reporting Organization 4-261
4.223 Required Collection Frequency Begin Date 4-262
4.224 Required Collection Frequency Code 4-263
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4.225 Required Collection Frequency End Date 4-264
4.226 Road Type 4-265
4.227 Sample Date 4-266
4.228 Sample Date/Time 4-267
4.229 Sample Residence Time 4-268
4.230 Sample Schedule Month 4-269
4.231 Sample Time 4-270
4.232 Schedule Exemption Indicator 4-271
4.233 Screening Group Number 4-272
4.234 Sequence Number 4-273
4.235 Session Date 4-274
4.236 Session Screening Group 4-275
4.237 Session User ID 4-276
4.238 Site ID 4-277
4.239 Source Indicator 4-278
4.240 Source of Traffic Count 4-279
4.241 Source Scale 4-280
4.242 Spatial Average Indicator 4-281
4.243 Standard Deviation (Monitor Precision Summary) 4-282
4.244 Standard Deviation (Reporting Organization Accuracy Summary) 4-284
4.245 Standard Deviation (Reporting Organization Precision Summary) 4-285
4.246 Standard Horizontal Datum 4-287
4.247 Standard Latitude 4-288
4.248 Standard Longitude 4-289
4.249 Standard Sample Value 4-290
4.250 Standard Scale 4-292
4.251 Standard Unit 4-293
4.252 State Code 4-294
4.253 Status Indicator 4-295
4.254 Street Address 4-296
4.255 Street Name 4-297
4.256 Substitute Design Value (Annual) 4-298
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4.257 Substitute Mean (Annual) 4-300
4.258 Substitute Mean (Quarterly) 4-302
4.259 Summary Criteria Indicator (Annual) 4-303
4.260 Summary Criteria Indicator (Daily) 4-305
4.261 Summary Criteria Indicator (Quarterly) 4-306
4.262 Summary Quarter 4-307
4.263 Summary Year 4-308
4.264 Supporting Agency 4-309
4.265 Surrogate Indicator 4-310
4.266 Tangent Street Number 4-311
4.267 Time Period 4-312
4.268 Time Zone 4-313
4.269 Traffic Count 4-314
4.270 Tribal Code 4-315
4.271 Tribal Indicator 4-316
4.272 Uncertainty Value 4-317
4.273 Unrestricted Air Flow Indicator 4-318
4.274 Upper Probability Limit (Reporting Organization Accuracy Summary) 4-319
4.275 Upper Probability Limit (Reporting Organization Precision Summary) 4-321
4.276 Urban Area Code 4-324
4.277 Urban Area Represented 4-325
4.278 User Horizontal Datum 4-326
4.279 User Latitude 4-327
4.280 User Longitude 4-328
4.281 UTM Easting 4-329
4.282 UTM Northing 4-330
4.283 UTM Zone 4-331
4.284 Vertical Accuracy 4-332
4.285 Vertical Collection Method 4-333
4.286 Vertical Datum 4-334
4.287 Vertical Measure 4-335
4.288 Weighted Arithmetic Mean 4-336
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4.289 Worst Site Type 4-339
4.290 Year of Traffic Count 4-340
4.291 Year Represented 4-341
4.292 Zero Span 4-342
4.293 Zero Span Scale 4-343
4.294 Zip Code 4-344
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1 Introduction
1.1 AQS Documentation
This is the AQS Data Dictionary, part of the Documentation set for the Air Quality System
(AQS)
AQS Data Dictionary
AQS Data Input Formats (Summary)
AQS Data Coding Manual
AQS User's Guide (in draft)
AQS Data Reports and Retrieval Manual (in draft)
The AQS Data Dictionary presents detailed information about data in the database. Logical
groupings of data ("views") are documented, to help with effective use of the data. Field
attributes and definitions, and calculation algorithms, are provided as appropriate. This
document also provides information on transformed, derived or calculated information
presented to the user that does not directly reflect data in the form that it is stored in the
database.
AQS Data Input Formats is a small summary document showing the basic requirements for
data input. It is intended as a quick reference guide. Detailed information on the various data
input formats is contained in the AQS Data Coding Manual.
The AQS Data Coding Manual includes the information a user needs to know to create
transactions for loading data into the database. Information in the manual is presented on a
transaction by transaction basis. Business rules used by the AQS edit software, as well as the
accompanying error messages, are laid out to help build error free transactions, or
troubleshoot failed transactions.
The AQS User's Guide, includes information about accessing the system via a web browser,
using the on-line interface, and entering data using the on-line data entry screens
(Maintenance screens). The process for "loading" the transactions described in AQS Data
Coding Manual is explained, including using the "critical review" process, and "posting" the
data to the database.
The AQS Data Retrieval Manual, includes information about using the standard report
generation software. Information includes the type of reports, the selections available for
each report, the data included on the reports, and the on-line report interface. Information
about available work file outputs is also included.
1.2 About This Book
This volume, AQS Data Dictionary, describes the views, records, and fields used by AQS.
The data dictionary is organized by sections.
This introductory section provides a brief overview of the Air Quality System with a
discussion of the structure of the AQS data.
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Section 2:
1. Presents basic database concepts,
2. Describes the structure of the AQS
3. Presents data model diagrams that show the relationships between the data.
4. Defines terms used throughout the document, and their meaning in AQS.
Section 3 describes the AQS views. Each view description includes:
5. A narrative explaining its purpose, content, and use;
6. A description of the fields contained in the view.
Section 4 describes the AQS fields. The fields are presented in alphabetic order. Field
descriptions include:
7. A narrative describing the field, including its uses;
8. Those parts of AQS that are the source of the data;
9. The data type, length, and whether the field is required;
10. The views in which the field is used;
11. Any rules of value assignment, including algorithms and formulas.
The Air Quality System (AQS) is a computer-based information management system for
handling the storage and retrieval of information pertaining to ambient outdoor airborne
pollutants and related meteorological data. The AQS database uses Oracle database software;
access to the database is provided via web browsers (i.e. Internet Explorer). AQS is
administered by the U.S. Environmental Protection Agency (USEPA) Office of Air Quality
Planning and Standards (OAQPS) in Research Triangle Park, North Carolina.
The collection and maintenance of air quality data is required to establish and enforce the
standards set by the following Federal Acts and Amendments:
1955: Air Pollution Control Act
"An Act to provide research and technical assistance relating to air pollution control"
Reserved for Congress the right to control pollution.
1963: Clean Air Act
Emissions standards for stationary sources
Compliance deadlines for States
1965: Motor Vehicle Air Pollution Control Act
Emissions standards for vehicles
1967: Air Quality Act
Created Air Quality Control Regions (AQCR)
Timetables for State Implementation Plans (SIP)
1970: Amendments to the Clean Air Act
National Ambient Air Quality Standards (NAAQS)
New Source Performance Standards(NSPS)
New motor vehicle standards and compliance timetable
1990: Amendments to the Clean Air Act
1.3 About AQS
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Modification of standards and timetables
The monitoring data in AQS are the result of the various Clean Air Act requirements to
provide a national database of ambient air pollution data. Criteria pollutant (SO2, NO2, O3,
CO, PM10, PM2.5 and Pb) data, air toxics data, photochemical assessment data, and
meteorological data are reported to AQS. Individual observations, as well as summarized
data, are provided. The database contains values from 1957 through the present day. AQS
contains hundreds of millions of observations, coming from tens of thousands of monitors.
As regulations broaden to include more pollutants, the AQS system expands. For hazardous
air pollutants (HAPS) the USEPA is currently gathering data and has proposed baselines for
limiting emissions. There are currently over 1000 pollutants that AQS is prepared to track and
additions are made as needed.
In addition to the ambient pollutant concentration data, AQS contains descriptive information
about the location of the monitoring site (e.g., address, latitude/longitude, local site name,
etc.) where the ambient data are collected as well as information about the types of monitors
used to collect the ambient measurements. Quality assurance information is also contained in
the AQS.
The air pollution monitoring data residing in the AQS database is submitted directly to the
database by many different groups. The State, Tribal and Local air pollution agencies
throughout the United States routinely submit monitoring data from the air monitors that they
manage. Some Federal agencies, including USEPA, and private companies also supply data
directly. The data submitted by these various groups are "owned" by those groups... in other
words only the agency responsible for a monitor at a site can maintain that monitor's data.
USEPA's OAQPS maintains the administrative data in AQS (e.g. reference tables and codes,
security tables, and overall software maintenance).
AQS data are not real time, because observation data are quality assured by the submitting
agencies before loading into the database. Agencies generally have 3 months to collect,
analyze, compute, and quality assure the values prior to loading the data into AQS. Each
year, the monitoring agencies certify to USEPA that the criteria pollutant data values for that
year are correctly stored in the database. This data serves as the basis for area designations
(e.g. non-attainment designations), among many other uses. In addition to providing data for
evaluating conformance to Federal regulations, data from the AQS is used to fulfill air quality
information requests from the public.
Summary air quality data is available on AQS from 1957 onward. Detailed data reported
from individual monitoring devices are available for the past decade. Older detail data are
available as download files from the archive database. See the AQS website for these files. If
you do not see the files you need, the website also contains a request form to receive those
files. The website address is as follows:
http://www.epa.gov/ttn/airs/airsaqs/detaildata/requestingaqsdata.htm
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2 Description of Terms
2.1 Concepts
The AQS is both a repository and a tool.
2.1.1 AQS Repository
As a repository of data the AQS stores air quality information in a computer database. Over
the years this data has been stored on various computers in various forms. In the last decade
the data has been moved from an IBM system in AD ABASE, to a Digital Equipment system
in Oracle and will be moving to a faster system in the near future.
The repository contains data from 1957 to the present. In the late 1950s there were a few
hundred sites reporting data, that grew to over 5000 sites in the mid 1970s and there are now a
little over 3000 sites reporting data today. In 1957 only a few pollutants were monitored at
each location. Today there are some sites monitoring over 150 different pollutants so the
repository is receiving data from between 50 and 60 thousand data sources each year. Each
source reports raw data at different rates, some hour or sub-hourly, some daily, some every
few days. There are over 82 million new raw data records added to the repository each year.
With such a large amount of data to work with the repository has been broken into over 100
"tables" of data. This distribution of data is an attempt to improve load and search times and
to reduce unnecessary repetition of data values. This distributed data structure is normally
concealed. While the repository is perhaps impressive in its complexity, size and scope, the
normal user of AQS has no direct contact with it. For users the data is structured into logical
2.1.2 Views Of The Repository.
While the actual data structure of the repository is concealed, the logical structure of the data
is very important to understand. In brief form, the structure of AQS can be stated as: "Sites
contain monitors which contain raw data, summary data, and precision data and accuracy
In order to present the data to the user logically, views have been created that collect the data
dispersed throughout the database and then present it as a logically structured and unified
dataset.
A site is logically identified by three elements: State and County codes and Site ID (or
alternatively Tribal Code and Site ID). While multiple sites may be in a County or Tribal
area, they each must have a unique site ID. These codes describe the unique identifier of the
Site or the key. Each site record then contains required data elements such as location data
(lat/long or UTM, elevation, address, etc.) Optional information, such as the agency that
services the site, associated meteorological site or congressional district are also included in
the view of the site.
There are 3 views associated with sites. In addition to the main site view there is a Tangent
Road view and an Open Path view. Because there can be multiple roads near a site, each road
"views".
data."
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can be treated as a separate entity associated with the site. Using multiple site views avoids
burdening a single view with all the data associated with a site.
The unique ID key elements for a monitor are its site elements, plus a pollutant code and a
parameter occurrence code (POC). Note: A "monitor " in AQS represents not a device but the
pollutant measured by a device. A single device that measures multiple pollutants appears as
multiple monitors within AQS; each AQS monitor represents one pollutant. Sites may have
more than one monitor measuring the same pollutant. Each monitor is uniquely identified
with a unique POC. Data elements associated with the monitor include the agency reporting
the data, the group responsible for entering the data, data collection frequency, collection
method, etc. Different fields are required depending on the pollutant. To fully describe a
monitor there are 13 views available.
Raw data values are the pollutant levels reported by a monitor. The logical identifier key for
raw data is made up of the site/monitor elements plus Date and Time elements. Raw Data
Views described in this Data Dictionary present date/time as a single field in the form of
Year, Month, Day, Hour, Minute (YYYMMDDHH:mm). When this same identifier is
presented in the AQS tools for data entry and reports, it is usually broken into separate Date
and Time fields. The AQS Data Table Fields section of this book includes definitions and
descriptions for both the combined and separated fields. (It is in the database as a single field.)
While raw data is linked to a monitor, Qualifiers and Comments are linked to raw data.
Qualifier codes represent natural or anthropogenic events that explain high, low or null raw
data values.
Precision, Accuracy and Blanks records are logically identified using the same elements used
to identify raw data.
Summaries (except for Site Daily Values) are identified with a unique identifier key
comprised of the monitor identifier elements, year element, duration element, and qualifier
type. Each monitor has summaries pre-calculated from its associated raw data and stored in
the repository for each year it is active. There are multiple summaries calculated based on
sample durations and with different types of qualifiers included or excluded.
Site Daily Values are uniquely identified by their site identifier elements, parameter, sample
day, and exceptional data type. Site Daily Values are calculated from daily summaries
associated with either the primary monitor (as determined by Primary Monitor Periods) for
the site for each sampled day when available, or from an aggregate of the daily summaries
associated with the collocated (non-primary) monitors when the primary monitor data is
unavailable. The source (primary or collocated) of the calculated value is indicated as part of
the Site Daily Values record.
The illustration below shows the links between logical data elements in AQS.
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P&A Data
Raw Data Monitor
Summaries
Site
Monitor
More illustrations showing the relationships between each of the views are in the Data Model
section below.
It is the AQS tools that make the AQS data in the repository useful and meaningful. The AQS
repository is now accessed through web browser interfaces for:
Loading data,
Maintaining/correcting data and
Reporting/extracting data.
AQS tools are described in more detail in the AQS Coding Manual and AQS Users Manual.
2.1.3 AQS Tools
2.2 Definitions
Term
Definition
Active Day
A day occurring within a valid sample period.
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Term
Definition
Air Quality Index The Air Quality Index (AQI) is a measure for reporting
daily air quality. It focuses on health effects that may
be experienced within hours or days after breathing
polluted air. AQI is calculated from the following
major air pollutants regulated by the Clean Air Act:
Ozone, PM 2.5, PM 10, carbon monoxide, sulfur
dioxide, and nitrogen dioxide. The AQI is a mapping
from pollutant concentrations to the common index.
The index is based on defining seven levels of
concentration/index values that are classified as
follows:
Good (with AQI values from 0 to 50),
Moderate (with AQI values from 51 to 100),
Unhealthy for Sensitive Groups (with AQI values from
101 to 150),
Applicable Standard Sample measurements flagged for exceptional event
exclusion can be concurred with respect to a specific
NAAQS standard. For example, ozone measurements
flagged for exclusion, can be concurred with respect to
either the 1997 standard or the 2008 standard or both.
Similarly, PM 2.5 data can be concurred with regards to
the 24 hour standard or the Annual standard or both.
AQCR
Air Quality Control Region
AQS
Air Quality System
AQS Field Name
The standard term for an AQS data element. When AQS
data is presented in a tabular view, the column header
would be the field name.
Average
Arithmetic mean
CBS A
Core Based Statistical Area
CEILING
IG function returns the smallest integer higher than, or
equal to, the given number. Frequently referred to as
"rounding up".
CFR
Code of Federal Regulations
CMSA
Consolidated Metropolitan Statistical Area
CO
Carbon Monoxide
Composite Data
An average pollutant value entered as a single record in
the database that is calculated from multiple samples.
CSA
Combined Statistical Area
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Term
Definition
A value given credit for data completeness. Either a
scheduled sample or a make-up sample. Note: This is
not affected by flagging for event exclusion and regional
concurrence; i.e. all sample measurements on scheduled
days or make-up days are creditable samples,
independent of whether or not they are affected by an
exceptional event.
Database Field Name The Oracle field name for an AQS data element. The
name must conform to Oracle field name constraints,
e.g., a maximum of 30 characters, no spaces, no
punctuation marks, etc. The database field name will
generally be an abbreviated form of the AQS field
name.
EDR Environmental Data Registry
Effective Monitoring Season The consecutive sub-annual period, during which ozone
(for ozone) monitoring is required for NAMS and SLAMS
monitors, as listed in the ambient monitoring rule
(40CFR58, Appendix D), extended to include the
earliest and latest exceedances occurring outside that
defined season
EPA
Environmental Protection Agency
Exceedance
A sample value measurement that is above the level of
the applicable standard.
Creditable Sample /
Creditable Day
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Term
Definition
Exceptional Data Type An AQS designation as to how a summary is affected by
exceptional events. Possible Values include the
following:
0 - No Events: None of the measurement data
contributing to the summary (e.g. count, mean, and
etc.) has been flagged for exceptional event
exclusion.
1 - All Events Excluded: The summary excludes any
measurements that have been flagged for exceptional
event exclusion independent of whether or not the
EPA has concurred with the flagging.
2 - Events Included: Measurements included in the
summary have been flagged for exceptional event
exclusion. (Note: They are included in the summary
independent of whether or not the EPA has concurred
with the flagging.)
5 - Concurred Events Excluded: The summary
excludes any measurements that have been flagged
for exceptional event exclusion and the flagging has
been concurred by the EPA Regional Office.
Note: For any site/monitor and summary time
period, either a Type 0 summary will exist (indicating
that no data was flagged) or a Type 1, a Type 2, and
a Type 5 summary will all exist together.
Exceptional Event An event that affects air quality, is not reasonably
controllable or preventable, is an event caused by
human activity that is unlikely to recur at a particular
location or a natural event, and is determined by the
EPA in accordance with 40 CFR 50.14 to be an
exceptional event.
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Term
Definition
Field Type (Length) There are four field types used in AQS: character,
numeric, float, and date.
The lengths represent the length of the underlying
physical field. The physical length is large enough to
accommodate the current lengths used plus any future
growth. For example, Method Code has a length of 8,
which accommodates the 3-digit logical length currently
used and any conceivable expansion needed in the
future.
Character types have maximum lengths associated with
them. The lengths of numeric fields are indicated by the
number of digits to the left and right of the decimal
point. For example, a numeric field with a length of 8.2
has 8 digits to the left of the decimal point, and 2 to the
right, for a maximum of 10, i.e., nnnnnnnnn.nn. Date
and float types have a fixed length by definition. The
date type includes both date and time in that same fixed
length; the float type can accommodate numbers in the
range of 1.0E-129 through 9.999E125.
Flag for Exceptional Event
A State may request EPA to exclude measurement data
Exclusion
showing exceedances or violations of the national
ambient air quality standard that are directly due to an
exceptional event from use in determinations by
demonstrating to EPA's satisfaction that such event
caused a specific air pollution concentration at a
particular air quality monitoring location.
FIPS
Federal Information Processing Standards
FRM
Federal Reference Method
GPS
Global Positioning System
Hourly Sample
A sample whose sample duration, or interval, is one (1)
hour.
HQ
EPA Headquarters
ID
Numeric identifier
Key
An indication of whether a field is part of the unique
identification of a record in the view.
The combination of data elements that uniquely identify
a record in the view
LDP
Locational Data Policy
LST
Local Standard Time
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Term
Definition
Make-up Day / Make-up
A make-up day/sample for a monitor is a sample to be
Sample
used in place of a missed scheduled sample. It must
meet the following criteria:
Ś It must be prior to the next scheduled sample or
exactly one week after the missed sample.
Ś It must be in the same calendar quarter.
Ś PM 2.5: No more than 5 make up samples per
quarter are allowed.
MDL
Method detectable limit, or the lowest concentration
that can be detected by a sampling instrument and
method.
MINIMUM
A MINIMUM function returns the least of a series of
numbers.
Monitoring Season (Defined)
: consecutive sub-annual period, defined by state, county,
or site, during which ozone monitoring is required
for National Air Monitoring Station (NAMS) and
Local Air Monitoring Station (SLAMS) monitors,
as, listed in the ambient monitoring rule (40CFR58,
Appendix D.)
Monitoring Season (Effective)
The defined monitoring season for a National Air
Monitoring Station (NAMS) or Local Air Monitoring
Station (SLAMS) monitor extended to include the
earliest and latest exceedances occurring outside that
defined season.
MSA
Metropolitan Statistical Area
NAAQS
National Ambient Air Quality Standards;
Sets the levels of air quality for the United States, in
the Code of Federal Regulations (40 CFR Part 50), to
protect the population's health and the environment
NAMS
National Air Monitoring Station
N02
Nitrogen Dioxide
03
Ozone
PAMS
Photochemical Assessment Monitoring System
Parameter
Pollutant measured by a device
Pb
Lead
PEP
Performance Evaluation Program
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Term
Definition
Percentile Value
PM
PM10
PM2.5
The following is the derivation of the formula used to
compute percentile values:
Let P be defined to be the the level of the ith percentile
(e.g. P=99 for the 99th Percentile) then by definition, the
ith percentile for the set, X, is the smallest value of X
such that
NumberOjValues < X
lOOx-
TotalNumberOjValues
>P
For a set with n values, the kth maximum (i.e. the 1st
maximum, 2nd maximum, and etc.) is the ith percentile of
the set, for the largest value of k, where
(n + l)-k
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Term
Definition
Raw Data
Parameter level value reported from a single
observation. The duration of the sample depends on
the device and method of collection.
RCF
Required Collection Frequency
Required
An indication of whether a field always has a value,
i.e., not null. It should be noted that an indication
that a field value is required does not mean that it
must be user-specified; it may be system-generated.
Some columns are conditionally user-specified and
system generated. For example, for site coordinates
the user may specify the latitude and longitude
coordinates, and the system will generate the
Universe Transverse Mercator (UTM) coordinates,
or vice versa.
Row
Collection of data fields that, together, make up a
single record in a data table.
Scheduled Day
A scheduled day for a monitor is a day on which
sampling is specified to occur, as determined by the
applicable Required Collection Frequency and the
National Air Monitoring Station (NAMS) schedule.
A scheduled day for a site would coincide with a
scheduled day for any monitor at the site.
Scheduled Sample
A sample recorded on a Scheduled Day.
Scheduled Stratum
A period of time starting from a Scheduled Day up to,
but not including the immediately succeeding
Scheduled Day.
Secondary Standard
Value identified by 40 CFR Part 50 as the
"Secondary" National Ambient Air Quality Standard
for a particular pollutant for protecting the public
welfare.
SLAMS
Local Air Monitoring Station
S02
Sulfur Dioxide
Table
A collection of related data organized into logical rows
and columns. The structure that is the repository of
data in the computer. See "View"
TSP
Total Suspended Particulate
(j,g/mj LC
micrograms per cubic meter - local conditions
Hg/m3 SC
micrograms per cubic meter - standard conditions
USGS
United States Geological Survey
UTM
Universal Transverse Mercator. A geospatial
positioning system that breaks areas of the earth into
zones and identifies a location with a pair of numbers
(Easting and Northing for US locations)
Valid Daily Maximum
The maximum value recorded, or computed, on a day
that meets daily summary criteria.
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Term
Definition
Valued Stratum
A Scheduled Stratum during which at least one
observation was recorded.
Value Set
A collection of data values associated together in a
table or view. When presented in tabular form, a row
or part of a row containing associated values. The ten
highest reported pollutant values in a year is a value
set in the Annual Summary view made up of the fields
containing the values, their ranks and the date/time of
each value.
View
A logical representation of data, looking like a table,
where data elements are grouped, joined or
transformed together from one or more tables of data.
Views are used, rather than actual data tables, to
simplify the AQS database for users.
WGS
World Geodetic Survey
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2.3 Data Model
2.3.1 Sites and Monitors
In the data model diagram below the relationships between the logical data views is
illustrated. The arrows indicate a Parent>Child relationship.
A Site record can be a parent to Tangent Roads, Open Paths, Monitors and
Comments.
A Monitor Tangent Road record is the child of BOTH the Tangent Road of a site
and the Monitor of the same site. (Sites can be large enough that devices on the site can
have significant differences in distance from roads.)
Monitor views may reference Open Paths defined on the parent site. There is no
corresponding monitor open path view.
Comments may be accessed from a single view and are the children of EITHER a
Monitor OR a Site.
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2.3.2
Monitors and Pollutant Data
2.3.3 Monitors and Summaries
Site Daily Values may be derived from more than one monitor at a Site and therefore is
subordinate to the Sites view and not the Monitors view.
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2.3.4 Monitors and Precision & Accuracy Summaries
Note that this diagram shows the subordinate relationships between views and does not show
the derivation of the data. A Monitor Precision Summary is subordinate to a Monitor Agency
Role within a Monitor. Reporting Organization Summaries contain data from multiple
monitors and therefore are not subordinate to a view of a single monitor. (Note: Precision and
Accuracy Summaries are only calculated for data collected up to 12/31/2006.)
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3 AQS Views
AQS Site Views
3.1 Sites
3.1.1 Description
The Sites view contains information about Air Quality Sites: geographical information, (e.g.,
latitude and longitude, or Universe Transverse Mercator, i.e., UTM coordinates), historical
information, (e.g., established and terminated dates), site location information, (e.g., street
address, city, Air Quality Control Region or AQCR), and other general characteristics, (e.g.,
land use, location setting). In addition, the view contains all information required by the
Locational Data Policy. A Sites record is uniquely identified by the combination of state,
county, and site ID. Alternative unique identifiers are the latitude-longitude combination, and
the UTM coordinates. Its parent is the Counties view; its child views are: Tangent Roads,
Open Paths, Monitors, and Comments.
3.1.2 Elements
Name
Database Field
Type (Length)
Req'd
Kev
Tribal Code
TRIBAL CODE
CHARACTER (3)
V
State Code
STATE CODE
CHARACTER (2)
V
V
County Code
COUNTY CODE
CHARACTER (3)
V
V
Site ID
SITE ID
CHARACTER (4)
V
V
Status Indicator
STATUS IND
CHARACTER (1)
V
Standard Horizontal
STANDARD HORIZONTAL DAT
CHARACTER (120)
V
Datum
UM
Standard Latitude
STANDARD LATITUDE
NUMBER (2.6)
Standard Longitude
STANDARD LONGITUDE
NUMBER (3.6)
User Latitude
USER LATITUDE
NUMBER (2.6)
User Longitude
USER LONGITUDE
NUMBER (3.6)
UTM Zone
UTM ZONE
NUMBER (12)
UTM Easting
UTM EASTING
NUMBER (8.2)
UTM Northing
UTM NORTHING
NUMBER (8.2)
User Horizontal Datum
USER HORIZONTAL DATUM
CHARACTER (120)
V
Horizontal Collection
LDP COLL METHOD CODE
CHARACTER (8)
V
Method
Horizontal Accuracy
LDP HORIZ ACC VALUE
NUMBER (8.2)
V
Source Scale
LDP SOURCE SCALE
NUMBER (12.0)
Geometric Type
LDP GEOMETRIC TYPE
CHARACTER (50)
V
Reference Point
LDP REFERENCE POINT
CHARACTER (50)
V
Vertical Measure
LDP VERT MEAS
NUMBER (8.2)
V
Vertical Collection
LDP VERTICAL METHOD CODE
CHARACTER (3)
V
Method
Vertical Datum
LDP VERTICAL DATUM
CHARACTER (60)
V
Vertical Accuracy
LDP VERT ACC VALUE
NUMBER (8.2)
V
Time Zone
TIMEZONENAME
CHARACTER (30)
Supporting Agency
AGENCY CODE
CHARACTER (8)
V
Street Address
STREET ADDRESS
CHARACTER (240)
V
City Code
CITY CODE
CHARACTER (8)
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Name
Database Field
Type (Length)
Req'd
Key
Urban Area Code
UAR CODE
CHARACTER (4)
AQCR
AQCR CODE
CHARACTER (8)
Land Use Type
LAND USE TYPE
CHARACTER (20)
V
Location Setting
LOCATION SETTING
CHARACTER (50)
V
Date Site Established
SITE ESTAB DATE
DATE
V
Date Site Terminated
SITE TERMINATED DATE
DATE
Zip Code
ZIP CODE
CHARACTER (9)
Congressional District
CONGR DISTR NUM
NUMBER (12.0)
Census Tract
CENSUS TRACT NUM
CHARACTER (6)
Block Group
N/A (Unused)
CHARACTER (1)
Block
BLOCK NUM
CHARACTER (4)
Class I Area
CLASS I AREA CODE
CHARACTER (8)
Local Region
LOCAL REGION CODE
CHARACTER (8)
Local Site Name
LOCAL SITE NAME
CHARACTER (70)
HQ Evaluation Date
HQ EVAL DATE
DATE
EPA Region
REGIONAL EVAL DATE
DATE
Evaluation Date
Direction from Central
COMPASS SECTOR CBD
CHARACTER (3)
Business District to
Site
Distance from Central
CITY DIST
NUMBER (8.2)
Business District to
Site
Meteorological Site
MET SITE TYPE
CHARACTER (20)
Type
Meteorological Site ID
MET SITE ID
CHARACTER (11)
Direction to
COMPASS SECTOR MET SITE
CHARACTER (3)
Meteorological Site
Distance to
MET SITE DIST
NUMBER (8.2)
Meteorological Site
Local Site ID
LOCAL SITE ID
CHARACTER (40)
Created User
CREATED USER
CHARACTER (40)
Created Date
CREATED DATE
DATE
Modified User
MODIFIED USER
CHARACTER (40)
Modified Date
MODIFIED DATE
DATE
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3.2 Tangent Roads
3.2.1 Description
The Tangent Roads view contains information about streets near a monitoring site, including:
the name, positioning relative to the site, and general use characteristics. A Tangent Roads
record is uniquely identified by the combination of state, county, site ID, and street number.
Its parent is the Sites view; its child view is Monitor Tangent Roads.
3.2.2 Elements
Name
Database Field
Type (Length)
Req'd
Key
Tribal Code
TRIBAL CODE
CHARACTER (3)
V
State Code
STATE CODE
CHARACTER (2)
V
V
County Code
COUNTY CODE
CHARACTER (3)
V
V
Site ID
SITE ID
CHARACTER (4)
V
V
Tangent Street Number
TANGENT ROAD NUM
NUMBER (12.0)
V
V
Status Indicator
STATUS IND
CHARACTER (1)
V
Street Name
TANGENT ROAD NAME
CHARACTER (50)
V
Road Type
ROAD TYPE
CHARACTER (20)
V
Direction from Site to Street
COMPASS SECTOR
CHARACTER (3)
V
Traffic Count
DAILY TRAFFIC CNT
NUMBER (12.0)
Year of Traffic Count
DAILY TRAFFIC YEAR
NUMBER (4.0)
Source of Traffic Count
TRAFFIC VOLUME SOURCE
CHARACTER (50)
Created User
CREATED USER
CHARACTER (40)
Created Date
CREATED DATE
DATE
Modified User
MODIFIED USER
CHARACTER (40)
Modified Date
MODIFIED DATE
DATE
3.3 Open Paths
3.3.1 Description
The Open Paths view contains information about open paths at a monitoring site, including
relative positioning and dimensions. An open paths record is uniquely identified by the
combination of state, county, site ID, and path number. Its parent is the Sites view.
3.3.2 Elements
Name
Database Field
Type (Length)
Req'd
Key
Tribal Code
TRIBAL CODE
CHARACTER (3)
State Code
STATE CODE
CHARACTER (2)
V
V
County Code
COUNTY CODE
CHARACTER (3)
V
V
Site ID
SITE ID
CHARACTER (4)
V
V
Open Path Number
OPEN PATH NUM
NUMBER (12.0)
V
V
Status Indicator
STATUS IND
CHARACTER (1)
V
Direction from Receiver to
COMPASS SECTOR
CHARACTER (3)
V
Transmitter
Land Use Under Path
LANDUSETYPE
CHARACTER
(20)
V
Beam Length
BEAM LENGTH
NUMBER (8.2)
V
Minimum Beam Height
MIN BEAM HEIGHT
NUMBER (8.2)
V
Maximum Beam Height
MAX BEAM HEIGHT
NUMBER (8.2)
V
Height of Receiver
RECEIVER HEIGHT
NUMBER (8.2)
V
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Name
Database Field
Type (Length)
Req'd
Key
Height of Transmitter
TRANSMITTER HEIGHT
NUMBER (8.2)
7
Created User
CREATEDUSER
CHARACTER
(40)
Created Date
CREATED DATE
DATE
Modified User
MODIFIEDU SER
CHARACTER
(40)
Modified Date
MODIFIED DATE
DATE
3.4 Primary Monitor Periods
3.4.1 Description
The Primary Monitor Periods view defines the periods of time during which a monitor serves
as the designated primary monitor for a combinable parameter. A Primary Monitor Periods
record is uniquely identified by the combination of monitor and begin date.
3.4.2 Elements
Name
Database Field
Type (Length)
Req'd
Key
Monitor ID
MO ID
NUMBER(10,0)
V
Begin Date
BEGIN DATE
DATE
V
V
End Date
END DATE
DATE
Created User
CREATED USER
VARCHAR2(30)
Created Date
CREATED DATE
DATE
Modified User
MODIFIED USER
VARCHAR2(30)
Modified Date
MODIFIED DATE
DATE
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AQS Monitor Views
3.5 Monitors
3.5.1 Description
The Monitors view contains information about air quality monitoring stations, including:
parameter, Pollutant Occurrence Code (POC), dominant source of pollution, measurement
scale, and probe description information. A Monitors record is uniquely identified by the
combination of site ID, parameter, and POC. Its parent is the Sites view; its child views are:
Sample Periods, Monitor Type Assignments, Monitor Agency Roles, Monitor Objectives,
Required Collection Frequencies, Monitor Tangent Roads, Monitor Pollutant Areas, Monitor
Regulatory Compliances, Monitor Protocols, Monitor Collocation Periods, Probe
Obstructions, Comments, NAAQS Averages, Daily Summaries, Quarterly Summaries, and
Annual Summaries.
3.5.2 Elements
Name
Database Field
Type (Length)
Req'd
Key
Monitor ID
MO ID
NUMBER(10,0)
Site ID
SI SI ID
NUMBER(10,0)
V
Parameter Code
PA PARAMETER CODE
VARCHAR2(5)
V
Parameter Occurrence
POC
NUMBER(2,0)
V
Code
Status Indicator
STATUS IND
VARCHAR2(1)
V
Screening Group
SG SCREENING GROUP NUM
NUMBER(12,0)
V
Post Indicator
RAW DATA POST IND
VARCHAR2(1)
V
Measurement Scale
MS MEASUREMENT SCALE
VARCHAR2(20)
Project Class
PTY PROJECT TYPE CODE
VARCHAR2(8)
Probe Location
PL PROBE LOCATION
VARCHAR2(20)
V
Dominant Source
DS DOMINANT SOURCE
VARCHAR2(20)
Probe Height
PROBE HEIGHT
NUMBER(10,2)
Probe Horizontal Distance
PROBE HORIZ DIST
NUMBER(10,2)
Probe Vertical Distance
PROBE VERT DIST
NUMBER(10,2)
Unrestricted Air Flow
UNRESTR AIR FLOW IND
VARCHAR2(1)
Indicator
Sample Residence Time
SAMPLE RESIDENCE TIME
NUMBER(10,2)
Last Post Date
LAST RAW DATA POST DATE
DATE
OP OP ID
NUMBER(10,0)
Last Sampling Date
LAST SAMPLING DATE
DATE
Surrogate Indicator
SURROGATE IND
VARCHAR2(1)
Created User
CREATED USER
VARCHAR2(40)
Created Date
CREATED DATE
DATE
Modified User
MODIFIED USER
VARCHAR2(40)
Modified Date
MODIFIED DATE
DATE
Screening Group Number
SES SGA SG SCREENING GRO
UP NUM
NUMBER(12,0)
Oracle User ID
SES SGA UP ORACLE USER ID
VARCHAR2(40)
Session Date
SES SESSION DATE
DATE
Post Date
RAW DATA POST DATE
DATE
Close Date
CLOSE DATE
DATE
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3.6 Monitor Pollutant Areas
3.6.1 Description
The Monitor Pollutant Areas view contains information about designations of monitors to
pollutant areas, which are geographic areas defined by a program office in which a certain
pollutant should be closely watched. Pollutant area types are Monitoring Areas, Monitor
Planning Areas, and Status Areas. A Monitor Pollutant Areas record is uniquely identified by
the combination of monitor and pollutant area. Its parent is the Monitors view.
3.6.2 Elements
Name
Database Field
Type (Length)
Req'd
Key
Tribal Monitor ID
TRIBAL MONITOR ID
CHARACTER (20)
V
Monitor ID
MONITOR ID
CHARACTER (20)
V
V
Pollutant Area Code
POLLUTANT AREA CODE
CHARACTER (5)
V
V
Status Indicator
STATUS IND
CHARACTER (1)
V
Pollutant Area Type
POLLUTANT AREA TYPE
CHARACTER (40)
V
Worst Site Type
WORST SITE TYPE
CHARACTER (8)
Community
Monitoring Zone
COMMUNITYMONITORINGZONE
NUMBER (4.0)
Applicable NAAQS
Indicator
APPLICABLENAAQSIND
CHARACTER (1)
Spatial Average
Indicator
SPATIALAVERAGEIND
CHARACTER (1)
Schedule Exemption
Indicator
SCHEDULEEXEMPTIONIND
CHARACTER (1)
Created User
CREATED USER
CHARACTER (40)
Created Date
CREATED DATE
DATE
Modified User
MODIFIED USER
CHARACTER (40)
Modified Date
MODIFIED DATE
DATE
3.7 Sample Periods
3.7.1 Description
The Sample Periods view defines the time periods during which sampling took place at a
monitor. A Sample Periods record is uniquely identified by the combination of monitor and
the date sampling began. Its parent is the Monitors view.
3.7.2 Elements
Name
Database Field
Type (Length)
Req'd
Key
Tribal Monitor ID
TRIBAL MONITOR ID
CHARACTER (20)
V
Monitor ID
MONITOR ID
CHARACTER (20)
V
V
Date Sampling Began
SAMPLING BEGIN DATE
DATE
V
V
Date Sampling Ended
SAMPLING END DATE
DATE
Status Indicator
STATUS IND
CHARACTER (1)
V
Created User
CREATED USER
CHARACTER (40)
Created Date
CREATED DATE
DATE
Modified User
MODIFIED USER
CHARACTER (40)
Modified Date
MODIFIED DATE
DATE
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3.8 Monitor Type Assignments
3.8.1 Description
The Monitor Type Assignments view defines time periods during which a monitor was
assigned a particular monitor type, e.g. Local Air Monitoring Station (SLAMS), National Air
Monitoring Station (NAMS), or Photochemical Assessment Monitoring System (PAMS). A
Monitor Type Assignments record is uniquely identified by the combination of monitor,
monitor type, and the date the assignment began. Its parent is the Monitors view.
3.8.2 Elements
Name
Database Field
Type (Length)
Req'd
Key
Tribal Monitor ID
TRIBAL MONITOR ID
CHARACTER (20)
V
Monitor ID
MONITOR ID
CHARACTER (20)
V
V
Monitor Type
MONITOR TYPE
CHARACTER (20)
V
V
Monitor Type Begin
MONITOR TYPE BEGIN DATE
DATE
V
V
Date
Monitor Type End Date
MONITOR TYPE END DATE
DATE
Status Indicator
STATUS IND
CHARACTER (1)
V
Action Type
ACTION TYPE
CHARACTER (8)
Action Date
MONITOR TYPE ACTION DATE
DATE
Action Reason
ACTION REASON CODE
CHARACTER (8)
Created User
CREATED USER
CHARACTER (40)
Created Date
CREATED DATE
DATE
Modified User
MODIFIED USER
CHARACTER (40)
Modified Date
MODIFIED DATE
DATE
3.9 Monitor Agency Roles
3.9.1 Description
The Monitor Agency Roles view defines time periods during which a role, (PQAO, reporting,
collecting, analyzing), for a monitor was assigned to an agency. A Monitor Agency Roles
record is uniquely identified by the combination of monitor, role, and the date the role
assignment began. Its parent is the Monitors view.
3.9.2 Elements
Name
Database Field
Type (Length)
Req'd
Kev
Tribal Monitor ID
TRIBAL MONITOR ID
CHARACTER (20)
V
Monitor ID
MONITOR ID
CHARACTER (20)
V
V
Agency Role Name
ROLE
CHARACTER (20)
V
V
Agency Code
AGENCY CODE
CHARACTER (8)
V
Agency Role Begin Date
AGENCY ROLE BEGIN DATE
DATE
V
V
Agency Role End Date
AGENCY ROLE END DATE
DATE
Status Indicator
STATUS IND
CHARACTER (1)
V
Created User
CREATED USER
CHARACTER (40)
Created Date
CREATED DATE
DATE
Modified User
MODIFIED USER
CHARACTER (40)
Modified Date
MODIFIED DATE
DATE
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3.10 Monitor Objectives
3.10.1 Description
The Monitor Objectives view contains information that classifies the reason air monitoring is
being performed, and the target of that monitoring. A Monitor Objectives record is uniquely
identified by the combination of monitor and the objective type. Its parent is the Monitors.
3.10.2 Elements
Name
Database Field
Type (Length)
Req'd
Key
Tribal Monitor ID
TRIBAL MONITOR ID
CHARACTER (20)
V
Monitor ID
MONITOR ID
CHARACTER (20)
V
V
Monitor Objective Type
MONITOR OBJ TYPE
CHARACTER (50)
V
V
Status Indicator
STATUS IND
CHARACTER (1)
V
Urban Area Represented
UAR CODE
CHARACTER (4)
MSA Represented
MSA CODE
CHARACTER (8)
CMSA Represented
CMSA CODE
CHARACTER (8)
CBS A Represented
CBS A CODE
CHARACTER (5)
CSA Represented
CSA CODE
CHARACTER (3)
Created User
CREATED USER
CHARACTER (40)
Created Date
CREATED DATE
DATE
Modified User
MODIFIED USER
CHARACTER (40)
Modified Date
MODIFIED DATE
DATE
3.11 Required Collection Frequencies
3.11.1 Description
The Required Collection Frequencies view defines time periods during which a designated
frequency of data collection was required. A Required Collection Frequencies record is
uniquely identified by the required collection frequency ID. Its parent is the Monitors view.
3.11.2 Elements
Name
Database Field
Type (Length)
Req'd
Kev
Required Collection
Frequencies ID
RCFID
NUMBER(10,0)
7
Monitor ID
MO MO ID
NUMBER(10,0)
Required Collection
Frequency Begin Date
REQCOLLFREQBEGINDATE
DATE
Required Collection
Frequency Code
CFCOLLFREQCODE
VARCHAR2(8)
Status Indicator
STATUS IND
VARCHAR2(1)
Required Collection
Frequency End Date
REQCOLLFREQENDDATE
DATE
Created User
CREATED USER
VARCHAR2(40)
Created Date
CREATED DATE
DATE
Modified User
MODIFIED USER
VARCHAR2(40)
Modified Date
MODIFIED DATE
DATE
Screening Group Number
SES SGA SG SCREENING GRO
UP NUM
NUMBER(12,0)
Oracle User ID
SES SGA UP ORACLE USER ID
VARCHAR2(40)
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Name
Database Field
Type (Length)
Req'd
Key
Session Date
SES SESSION DATE
DATE
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3.12 Sample Schedules
3.12.1 Description
The Sample Schedules view contains information about monthly collection frequencies for
seasonal or random required collection frequency period. A Sample Schedules record is
uniquely identified by the combination of required collection frequency ID and month. Its
parent is the Required Collection Frequencies view.
3.12.2 Elements
Name
Database Field
Type (Length)
Req'd
Kev
Sample Schedule ID
SS ID
NUMBER(10,0)
7
Required collection
Frequency ID
RCFRCFID
NUMBER(10,0)
Sample Schedule Month
SAMPLE SCHEDULE MONTH
NUMBER(2,0)
Status Indicator
STATUS IND
VARCHAR2(1)
Created User
CREATED USER
VARCHAR2(40)
Created Date
CREATED DATE
DATE
Modified User
MODIFIED USER
VARCHAR2(40)
Modified Date
MODIFIED DATE
DATE
Screening Group Number
SES SGA SG SCREENING GRO
UP NUM
NUMBER(12,0)
Oracle User ID
SES SGA UP ORACLE USER ID
VARCHAR2(40)
Session Date
SES SESSION DATE
DATE
Monthly Required
Collection Frequency
CF COLL FREQ CODE
VARCHAR2(8)
3.13 Monitor Tangent Roads
3.13.1 Description
The Monitor Tangent Roads view defines the distance between a monitor and a tangent road.
A Monitor Tangent Roads record is uniquely identified by the combination of monitor and
street number. Its parents are the Monitors and Tangent Roads views.
3.13.2 Elements
Name
Database Field
Type (Length)
Req'd
Kev
Tribal Monitor ID
TRIBAL MONITOR ID
CHARACTER (20)
V
Monitor ID
MONITOR ID
CHARACTER (20)
V
V
Tangent Street Number
TANGENTROADNUM
NUMBER (12.0)
V
V
Status Indicator
STATUS IND
CHARACTER (1)
V
Distance from Monitor to
DIST TO TANGENT ROAD
NUMBER (8.2)
V
Tangent Road
Created User
CREATED USER
CHARACTER (40)
Created Date
CREATED DATE
DATE
Modified User
MODIFIED USER
CHARACTER (40)
Modified Date
MODIFIED DATE
DATE
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3.14 Probe Obstructions
3.14.1 Description
The Probe Obstructions view contains information about any restriction of airflow around the
probe. A Probe Obstructions record is uniquely identified by the combination of monitor and
obstruction type. Its parent is the Monitors view.
3.14.2 Elements
Name
Database Field
Type (Length)
Req'd
Key
Tribal Monitor ID
TRIBAL MONITOR ID
CHARACTER (20)
V
Monitor ID
MONITOR ID
CHARACTER (20)
V
V
Probe Obstruction Type
PROBE OBSTR TYPE
CHARACTER (20)
V
V
Direction from Monitor to Probe
COMPASS SECTOR
CHARACTER (3)
V
V
Obstruction
Status Indicator
STATUS IND
CHARACTER (1)
V
Distance from Monitor to Probe
PROBE OBSTR DIST
NUMBER (8.2)
V
Obstruction
Probe Obstruction Height
PROBE OBSTR HEIGHT
NUMBER (8.2)
V
Created User
CREATED USER
CHARACTER (40)
Created Date
CREATED DATE
DATE
Modified User
MODIFIED USER
CHARACTER (40)
Modified Date
MODIFIED DATE
DATE
3.15 Monitor Regulatory Compliances
3.15.1 Description
The Monitor Regulatory Compliances view documents compliance of a monitor with a
regulation. A Monitor Regulatory Compliances record is uniquely identified by monitor and
regulation. Its parent is the Monitors view.
3.15.2 Elements
Name
Database Field
Type (Length)
Req'd
Kev
Tribal Monitor ID
TRIBAL MONITOR ID
CHARACTER (20)
V
Monitor ID
MONITOR ID
CHARACTER (20)
V
V
Regulation Code
REGULATION CODE
CHARACTER (8)
V
V
Status Indicator
STATUS IND
CHARACTER (1)
V
Compliance Indicator
COMPLIANCE IND
CHARACTER (3)
Compliance Date
COMPLIANCE DATE
DATE
Created User
CREATED USER
CHARACTER (40)
Created Date
CREATED DATE
DATE
Modified User
MODIFIED USER
CHARACTER (40)
Modified Date
MODIFIED DATE
DATE
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3.16 Monitor Collocation Periods
3.16.1 Description
The Monitor Collocation Periods view defines the periods of time during which a monitor
pair were collocated for the purpose of collecting precision data. A Monitor Collocation
Periods record is uniquely identified by the combination of monitor and the date collocation
began. Its parent is the Monitors view.
3.16.2 Elements
Name
Database Field
Type (Length)
Req'd
Key
Tribal Monitor ID
TRIBAL MONITOR ID
CHARACTER (20)
V
Monitor ID
MONITOR ID
CHARACTER (20)
V
V
Collocation Begin Date
CLOC BEGIN DATE
DATE
V
V
Status Indicator
STATUS IND
CHARACTER (1)
V
Primary Sampler Indicator
PRI MONITOR IND
CHARACTER (1)
V
Distance from Primary Sampler
CLOC DIST
NUMBER (8.2)
Collocation End Date
CLOC END DATE
DATE
Primary Sampler Monitor ID
PRIMARY MONITOR ID
CHARACTER (20)
Created User
CREATED USER
CHARACTER (40)
Created Date
CREATED DATE
DATE
Modified User
MODIFIED USER
CHARACTER (40)
Modified Date
MODIFIED DATE
DATE
3.17 Monitor Protocols
3.17.1 Description
The Monitor Protocols view contains the protocols by which sample data for a monitor are
collected. A Monitor Protocols record is uniquely identified by the combination of monitor,
protocols, and alternate method detectable limit (MDL). Its parents are the Monitors and
Protocols views; its child views are Raw Data, Composite Data, Summary Protocols,
Precision Summary Protocols, and Accuracy Summary Protocols.
3.17.2 Elements
Name
Database Field
Type (Length)
Req'd
Key
Monitor ID
MO MO ID
NUMBER(10,0)
V
a/
Monitor Protocol ID
MP ID
NUMBER(4,0)
V
V
Status Indicator
STATUS IND
VARCHAR2(1)
Protocol ID
PRO PRO ID
NUMBER(10,0)
Alternate Method
Detectable Limit (MDL)
ALTMDL
NUMBER(10,5)
Created User
CREATED USER
VARCHAR2(40)
Created Date
CREATED DATE
DATE
Modified User
MODIFIED USER
VARCHAR2(40)
Modified Date
MODIFIED DATE
DATE
Screening Group Number
SES SGA SG SCREENIN
G GROUP NUM
NUMBER(12,0)
Oracle User ID
SES SGA UP ORACLE
USER ID
VARCHAR2(40)
Session ID
SES SESSION DATE
DATE
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Name
Database Field
Type (Length)
Req'd
Key
Standard Scale
ALT MDL STD SCALE
NUMB ER( 1,0)
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3.18 Composite Data
3.18.1 Description
The CompositeData view contains the concentrations of air pollutants as measured by air
monitoring equipment from composite air samples. In the composite sampling technique, two
or more air samples obtained at different times are combined and analyzed as one sample.
This yields something of an average concentration for the time period during which the
individual samples were collected.
A Composite Data record is uniquely identified by the combination of monitor, year, and
composite period. Its parent is the Monitor Protocols view; its child view is
CompositeQualifierDetails.
3.18.2 Elements
Name
Database Field
Type (Length)
Req'd
Kev
Tribal Monitor ID
TRIBAL MONITOR ID
CHARACTER (20)
V
Monitor ID
MONITOR ID
CHARACTER (20)
V
V
Composite Year
COMP YEAR
NUMBER (4.0)
V
V
Composite Period
PERIOD
NUMBER (2.0)
V
V
Status Indicator
STATUS IND
CHARACTER (1)
V
V
Monitor Protocol ID
MP ID
NUMBER (4.0)
V
Number of Samples
SAMPLE CNT
NUMBER (10.0)
Reported Sample
Value
REPORTEDSAMPLEVALUE
NUMBER (5.5)
Reported Scale
REPORTED SCALE
NUMBER (1.0)
Standard Sample
STD SAMPLE VALUE
NUMBER (5.5)
Value
Standard Scale
SUMMARY SCALE
NUMBER (1.0)
Standard Unit
UN UNIT STD
CHARACTER (3)
Uncertainty Value
UNCERTAINTY VALUE
NUMBER (6.5)
Primary Qualifier
Code
QUALIFIERCODE
CHARACTER (8)
Primary Qualifier
Type
QUALIFIERTYPE
CHARACTER (8)
Half MDL
LT HALF MDL IND
CHARACTER (1)
Substitution Indicator
Null Data
NULL DATA CONCURRENCE IND
CHARACTER (1)
Concurrence Indicator
EPA Region
EPA CONCURRENCE IND
CHARACTER (1)
Concurrence Indicator
Exclusion Indicator
EXCLUSION IND
CHARACTER (1)
Exclusion Date
EXCLUSION DATE
DATE
Freeze Indicator
FREEZE IND
CHARACTER (3)
Action Indicator
ACTION IND
CHARACTER (1)
Session Screening
SCREENING GROUP NUM
NUMBER (12.0)
Group
Session User
ORACLE USER ID
CHARACTER (40)
Session Date/Time
SESSION DATE
DATE
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3.19 Composite Qualifier Details
3.19.1 Description
The CompositeQualifierDetails view contains qualification information about the
composite sample. Types of qualification are: exceptional event, natural events, and quality
assurance.
A Composite Qualifier Details record is uniquely identified by the combination of monitor,
year, composite period and qualifier. Its parent is the CompositeData view.
3.19.2 Elements
Name
Database Field
Type (Length)
Req'd
Kev
Tribal Monitor ID
TRIBAL MONITOR ID
CHARACTER (20)
V
Monitor ID
MONITOR ID
CHARACTER (20)
V
V
Composite Year
COMP YEAR
NUMBER (4.0)
V
V
Composite Period
PERIOD
NUMBER (2.0)
V
V
Status Indicator
STATUSIND
CHARACTER (1)
V
V
Qualifier Code
QUALIFIER CODE
CHARACTER (8)
V
V
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3.20 Raw Data
3.20.1 Description
The RawData view contains the concentrations of various air pollutants as measured by air
monitoring equipment throughout the U.S. The values may result from equipment that
monitors continuously, or monitors that require manual intervention to collect the data, e.g., a
monitor that draw air through a filter would require the removal and weighting of the filter to
determine the amount of particulate matter in the sampled air.
A Raw Data record is uniquely identified by the combination of monitor and date/time. Its
parent is the Monitor Protocols view; its child view is Raw Qualifier Details.
3.20.2 Elements
Name
Database Field
Type (Length)
Req'd
Key
Raw Data Key
RD ID
NUMBER(10,0)
7
a/
Tribal Monitor ID
TRIBALMONITORID
CHARACTER
(20)
V
Monitor ID
MP MO MO ID
NUMBER(10,0)
v
Monitor Protocol ID
MP MP ID
NUMBER(4,0)
V
Sample Date/Time
SAMPLING BEGIN DATETIME
DATE
V
Status Indicator
STATUS IND
VARCHAR2(1)
V
Raw Data Type
RD TYPE
VARCHAR2(10)
V
Reported Sample Value
REPORTED SAMPLE VALUE
NUMBER(10,5)
Reported Scale
REPORTED SCALE
NUMB ER( 1,0)
Standard Sample Value
STD SAMPLE VALUE
NUMBER(10,5)
Standard Scale
Reported Unit
Reported Unit Desc
Standard Unit
UN UNIT STD
VARCHAR2(3)
Std Unit Desc
Primary Qualifier Code
QU QUALIFIER CODE
VARCHAR2(8)
Primary Qualifier Type
QT QUALIFIER TYPE
VARCHAR2(8)
Half MDL Substitution
Indicator
LTHALFMDLIND
VARCHAR2(1)
Uncertainty Value
UNCERTAINTY VALUE
NUMBER(11,5)
Sample Date/Time: YYYY
Sample Date/Time: "Q"Q
Sample Date/Time: Mon
Sample Date/Time: DD
Sample Date/Time: HH24
Sample Date/Time: MI
Sample Count
SAMPLE CNT
NUMBER(10,0)
EPA Region Concurrence
Indicator
EPACONCURRENCEIND
VARCHAR2(1)
Freeze Indicator
FREEZE IND
VARCHAR2(3)
Action Indicator
ACTION IND
VARCHAR2(1)
Exclusion Indicator
EXCLUSION IND
VARCHAR2(1)
Exclusion Date
EXCLUSION DATE
DATE
Session Screening Group
SES SGA SG SCREENING GRO
UP NUM
NUMBER(12,0)
Session User
SES SGA UP ORACLE USER I
D
VARCHAR2(40)
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Name
Database Field
Type (Length)
Req'd
Key
Session Date/Time
SES SESSION DATE
Date
3.21 Raw Qualifier Details
3.21.1 Description
The RawQualifierDetails view contains qualification information about the raw sample.
Types of qualification are: null data, exceptional event, natural events, and quality assurance.
A Raw Qualifier Details record is uniquely identified by the combination of monitor, sample
date/time, and qualifier. Its parent is the RawData view.
3.21.2 Elements
Name
Database Field
Type (Length)
Req'd
Key
Tribal Monitor ID
TRIBAL MONITOR ID
CHARACTER (20)
V
Monitor ID
MONITOR ID
CHARACTER (20)
V
V
Sample Date/Time
SAMPLING BEGIN DATETIME
DATE
V
V
Status Indicator
STATUS IND
CHARACTER (1)
V
V
Qualifier Code
Sample Date/Time:
YYYY
QUALIFIER CODE
CHARACTER (8)
V
V
Sample Date/Time: "Q"Q
Sample Date/Time: Mon
Sample Date/Time: DD
Sample Date/Time: HH24
Sample Date/Time: MI
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3.22 Precision Data
3.22.1 Description
The PrecisionData view contains the precision check results for monitors for a pollutant.
Precision checks are determined by performing repeated measurements of ambient-level
"calibration" gases at two-week intervals for continuous analyzers, or by obtaining duplicate
results from collocated samplers for manual methods.
A Precision Data record is uniquely identified by the combination of monitor and date. Its
parent is the Monitor Protocols view.
3.22.2 Elements
Name
Database Field
Type (Length)
Req'd
Key
Tribal Monitor ID
TRIBAL MONITOR ID
CHARACTER (20)
Monitor ID
MONITOR ID
CHARACTER (20)
V
V
Precision Date
PREC DATE
DATE
V
V
Precision ID
PREC ID
NUMBER (2.0)
V
V
Monitor Protocol ID
MP ID
NUMBER (4.0)
V
Precision Class
AUDIT CLASS
CHARACTER (20)
V
Precision Scale
PREC SCALE
NUMBER (1.0)
V
Precision Sample ID
PREC SAMPLE ID
CHARACTER (10)
Actual Value
ACTUAL VALUE
NUMBER (5.5)
V
Actual Method
ACTUAL METHODOLOGY CODE
CHARACTER (8)
Indicated Value
INDICATED VALUE
NUMBER (5.5)
V
Indicated Method
INDICATED METHODOLOGY CODE
CHARACTER (8)
V
Percent Difference
PERCENT DIFF
NUMBER
V
Collocated POC
COLLOCATED POC
NUMBER (2.0)
Agency Performing
FRM Audit
AGENCYCODE
CHARACTER (8)
Created User
CREATED USER
CHARACTER (40)
Created Date
CREATED DATE
DATE
Modified User
MODIFIED USER
CHARACTER (40)
Modified Date
Prec Date: YYYY
Prec Date: Mon
MODIFIEDDATE
DATE
Prec Date: DD
Created Date: YYYY
Created Date: Mon
Created Date: DD
Modified Date: YYYY
Modified Date: Mon
Modified Date:DD
Precision Type
PRECISION TYPE
CH ARACTER(3 0)
4
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3.23 Accuracy Data
3.23.1 Description
The AccuracyData view contains the accuracy audits results for monitors for a pollutant.
Accuracy assessments indicate the agreement between an analyzer measurement and a known
audit standard concentration for continuous analyzers, or the agreement between an observed
value and a known or reference value for manual methods.
An Accuracy Data record is uniquely identified by the combination of monitor, audit class,
accuracy type, date and Accuracy Audit ID Number. Its parent is the Monitor Protocols
view.
3.23.2 Elements
Name
Database Field
Type (Length)
Req'd
Key
Tribal Monitor ID
TRIBAL MONITOR ID
CHARACTER (20)
V
Monitor ID
MONITOR ID
CHARACTER (20)
V
V
Accuracy Date
ACC DATE
DATE
V
V
Audit Class
AUDIT CLASS
CHARACTER (20)
V
V
Accuracy Type
ACC TYPE
CHARACTER (20)
V
V
Accuracy Audit ID
ACC AUDIT ID
NUMBER (2.0)
V
V
Number
Audit Level
LEVEL NUM
NUMBER (2.0)
V
V
Monitor Protocol ID
MP ID
NUMBER (4.0)
V
Local Primary Standard
LOCAL PRI STD
CHARACTER (30)
V
Audit Type
AUDIT TYPE
CHARACTER (20)
V
Year Represented
YEAR REPRESENTED
NUMBER (4.0)
V
Quarter Represented
QTR REPRESENTED
NUMBER (1.0)
V
Audit Sample ID
AUDIT SAMPLE ID
CHARACTER (10)
Expiration Date
EXPIRATION DATE
DATE
Audit Scheduled
AUDIT SCHEDULED
DATE
Zero Span
ZERO SPAN VALUE
NUMBER (5.5)
Zero Span Scale
ZERO SPAN SCALE
NUMBER (1.0)
Audit Scale
ACC AUDIT SCALE
NUMBER (1.0)
V
Actual Value
ACTUAL VALUE
NUMBER (5.5)
V
Indicated Value
INDICATED VALUE
NUMBER (5.5)
V
Percent Difference
PERCENT DIFF
NUMBER
V
Created User
CREATED USER
CHARACTER (40)
Created Date
CREATED DATE
DATE
Modified User
MODIFIED USER
CHARACTER (40)
Modified Date
MODIFIED DATE
DATE
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3.24 Blanks Data
3.24.1 Description
The Blanks Data view contains information about field and trip blank assessments.
A Blank Data record is uniquely identified by the combination of monitor, date/time, and
blank type. Its parent is the Monitor Protocols view.
3.24.2 Elements
Name
Database Field
Type (Length)
Req'd
Key
Tribal Monitor ID
TRIBAL MONITOR ID
CHARACTER (20)
V
Monitor ID
MONITOR ID
CHARACTER (20)
V
V
Blank Date/Time
BLANK DATETIME
DATE
V
V
Blank Type
BLANK TYPE
CHARACTER (20)
V
V
Monitor Protocol ID
MP ID
NUMBER (4.0)
V
Blank Value
BLANK VALUE
NUMBER (5.5)
Blank Scale
BLANK SCALE
NUMBER (1.0)
Uncertainty Value
UNCERTAINTY VALUE
NUMBER (6.5)
Primary Qualifier Code
QUALIFIER CODE
CHARACTER (8)
Primary Qualifier Type
QUALIFIER TYPE
CHARACTER (8)
3.25 Blanks Qualifier Details
3.25.1 Description
The Blanks Qualifier Details view contains qualification information about the blanks
sample. Types of qualification are: exceptional event, natural events, and quality assurance.
A Blank Qualifier Detail record is uniquely identified by the combination of monitor, sample
date/time, and qualifier. Its parent is the Blank Data view.
3.25.2 Elements
Name
Database Field
Type (Length)
Req'd
Key
Tribal Monitor ID
TRIBAL MONITOR ID
CHARACTER (20)
a/
Monitor ID
MONITOR ID
CHARACTER (20)
V
V
Blank Date/Time
BLANK DATETIME
DATE
V
V
Blank Type
BLANK TYPE
CHARACTER (20)
V
V
Qualifier Code
QUALIFIER CODE
CHARACTER (8)
V
V
3.26 Comments
3.26.1 Description
The Comments view contains free text narratives for sites, and monitors. Its parent is either
the Sites or Monitors views.
3.26.2 Elements
Name
Database Field
Type (Length)
Req'd
Key
Tribal Code-Site
TRIBAL SITE ID
CHARACTER^)
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Name
Database Field
Type (Length)
Req'd
Key
State-County-Site
SITE ID
CHARACTER (11)
V
Tribal Monitor ID
TRIBAL MONITOR ID
CHARACTER (20)
V
Monitor ID
MONITOR ID
CHARACTER (20)
V
Sequence Number
SEQUENCE NUM
NUMBER (12.0)
V
V
Text
COMMENT TEXT
CHARACTER (255)
V
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3.27 NAA QS Averages
3.27.1 Description
The NAAQS_Averages view contains system-calculated averages of hourly sample data for
some criteria pollutants. The averages are used for evaluation of compliance with National
Ambient Air Quality Standards (NAAQS). The averages cover multi-hour periods <= 24 hrs.
A NAAQS_Averages record is uniquely identified by the combination of monitor, date/time,
duration, exceptional data type, and pollutant standard ID. Its parent is the Monitors view.
3.27.2 Elements
Name
Database Field
Type (Length)
Req'd
Key
Tribal Monitor ID
TRIBAL MONITOR ID
CHARACTER (20)
a/
Monitor ID
MO MO ID
NUMBER(10,0)
V
V
NAAQS Date/Time
NAAQS AVG DATETIME
DATE
V
V
Duration Code
SD DURATION CODE
VARCHAR2(8)
V
V
Exceptional Data Type ID
EDT EDT ID
NUMBER(10,0)
V
V
Pollutant Standard
POLLUTANT STD ID
NUMBER
V
V
Arithmetic Mean
NAAQS ARITH MEAN
NUMBER(10,5)
Created User
CREATED USER
VARCHAR2(40)
Created Date
CREATED DATE
DATE
Modified User
MODIFIED USER
VARCHAR2(40)
Modified Date
MODIFIED DATE
DATE
3.28 Daily Summaries
3.28.1 Description
The DailySummaries view contains calculated values of concentrations of monitor samples,
which have been summarized for a monitor, day, sampling duration, and exceptional data
indicator combination. For a pollutant, Daily Summaries may be computed for both sample
measurements (hourly and daily) and NAAQS_Averages. They are explicitly for one
calendar day.
A Daily Summaries record is uniquely identified by the combination of monitor, date,
duration, exceptional data type, and pollutant standard ID. Its parent is the Monitors view.
3.28.2 Elements
Name
Database Field
Type (Length)
Req'd
Key
Monitor ID
MO MO ID
NUMBER(10,0)
V
V
Collection Date
DAILY COLL DATE
DATE
V
V
Duration Code
SD DURATION CODE
VARCHAR2(8)
V
V
Exceptional Data Type ID
EDT EDT ID
NUMBER(10,0)
V
V
Pollutant Standard
POLLUTANT STD ID
V
V
Arithmetic Mean
DAILY ARITH MEAN
FLOAT(22)
Count of Observations
DAILY OBS CNT
NUMBER(10,0)
Percent of Observations
DAILY OBS PCT
NUMBER(10,4)
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Name
Database Field
Type (Length)
Req'd
Key
Hour of Maximum Value
DAILY MAX COLL HOUR
NUMBER(2,0)
Maximum Value
DAILY MAX SAMPLE VALUE
NUMBER(10,5)
Daily Rank
DAILY RANKING NUM
NUMBER(3,0)
Count of Primary
Exceedances
VALUE SGTPRILE VELD S
NUMBER(10,0)
Count of Secondary
Exceedances
VALUE SGTSECLE VELD S
NUMBER(10,0)
Count of Non-Overlapping
Exceedances
NONOVERLAPPINGAVGGTSTD
NUMBER(10,0)
Summary Criteria Indicator
DAILY CRITERIA IND
VARCHAR2(1)
AQI Value
AQI VALUE
NUMBER
Created User
CREATED USER
VARCHAR2(40)
Created Date
CREATED DATE
DATE
Modified User
MODIFIED USER
VARCHAR2(40)
Modified Date
MODIFIED DATE
DATE
3.29 Quarterly Summaries
3.29.1 Description
The Quarterly Summaries view contains calculated values of concentrations of monitor
samples, which have been summarized for a quarter, sampling duration, and exceptional data
indicator combination. Quarterly Summaries are computed for each calendar quarter. They
may be computed for both sample measurements and NAAQS Averages
A QuarterlySummaries record is uniquely identified by the combination of monitor, year,
quarter, duration, exceptional data type and pollutant standard ID. Its parent is the Monitors
view.
Two exceptional event situations may exist: either exceptional event data is flagged or not.
No exceptional event data is flagged: This is the case where only type 0 (No Exceptional
Events) daily summaries exist for the monitor and quarter. A single quarterly summary row is
determined using Quarterly Arithmetic Mean = Average of all daily values (on any day, not
just scheduled days).
Exceptional event data is flagged: This is the case where daily summaries with a type=2
(Exceptional Events Included) or type=5 (Regionally concurred Exceptional Events
Excluded) exist. Three quarterly summary rows are created:
one with Exceptional Events Included (Quarterly Artithmetic Mean = Average of all
daily values (on any day, not just scheduled days, and exceptional data types 0 & 2)
one with all Exceptional Events excluded (Quarterly Arithmetic Mean = Average of
all daily values (on any day, not just scheduled days, and exceptional data types 0 &
1)
one with Regionally concurred Exceptional Events excluded. (Quarterly Artithmetic
Mean = Average of all daily values (on any day, not just scheduled days, with
exceptional data type 0 OR exceptional data type 5 AND Applicable Standard =
"Annual")
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For PM2.5, quarterly summaries are only used for computing the Arithmetic Mean values in
the Annual Summaries; i.e. they are not used for computing the 98th percentile values.
Therefore, the only quarterly summaries that exclude concurred exceptional event data that
need to be computed are those with the Applicable Standard = "Annual."
3.29.2 Elements
Name
Database Field
Type (Length)
Req'd
Key
Monitor ID
MO MO ID
NUMBER(10,0)
1
V
Summary Year
QTR YEAR
NUMBER(4,0)
V
V
Summary Quarter
QTR NUM
NUMB ER( 1,0)
V
V
Duration Code
SD DURATION CODE
VARCHAR2(8)
V
V
Exceptional Data Type
ID
EDTEDTID
NUMBER(10,0)
V
V
Pollutant Standard
POLLUTANT STD ID
NUMBER
V
V
Arithmetic Mean
QTR ARITH MEAN
FLOAT(22)
Count of Observations
QTR OBS CNT
NUMBER(12,0)
Percent of Observations
QTR OBS PCT
NUMBER(10,4)
Summary Criteria
Indicator
Direct Entry Indicator
Created User
Created Date
Modified User
Modified Date
QTRCRITERIAIND
QTR DIRECT ENTRY IND
CREATED USER
CREATED DATE
MODIFIED USER
MODIFIED DATE
VARCHAR2(3)
VARCHAR2(1)
VARCHAR2(40)
DATE
VARCHAR2(40)
DATE
3.30 Annual Summaries
3.30.1 Description
The AnnualSummaries view contains calculated values of concentrations of monitor
samples, which have been summarized for a year, sampling duration, and exceptional data
indicator combination. Annual summaries are computed for each calendar year. They may
be computed for both sample measurements and NAAQS Averages. They may include
statistics based on any of the lower level summaries (Daily or Quarterly) or sample
measurements. Part of the key is the sample measurement durations summarized (e.g.,
hourly, daily orNAAQS Average.)
An Annual Summaries record is uniquely identified by the combination of monitor, year,
duration, exceptional data type and pollutant standard ID. Its parent is the Monitors view; its
child view is Summary Maximums, Summary Percentiles, and Summary Protocols.
3.30.2 Elements
Name
Database Field
Type (Length)
Req'd
Key
Annual Summary ID
ANS ID
NUMBER(10,0)
V
Monitor ID
MO MO ID
NUMBER(10,0)
Summary Year
ANNUAL SUMMARY YEAR
NUMBER(4,0)
Duration Code
SD DURATION CODE
VARCHAR2(8)
Exceptional Data Type ID
EDT EDT ID
NUMBER(10,0)
Pollutant Standard
POLLUTANT STD ID
NUMBER
V
V
Summary Type
ANS TYPE
VARCHAR2(10)
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Name
Database Field
Type (Length)
Req'd
Key
Collection Frequency
Code
CFCOLLFREQCODE
VARCHAR2(8)
Summary Criteria
Indicator
ANNU ALCRITERIAIND
VARCHAR2(3)
Count of Methods
SUMMARY METHOD CNT
NUMBER(12,0)
Count of Observations
ANNUAL OBS CNT
NUMBER(10,0)
Annual Minimum Sample
Value
MIN_SAMPLE_VALUE
NUMBER(10,5)
Arithmetic Mean
ANNUAL ARITH MEAN
NUMBER
Geometric Mean
ANNUAL GEOM MEAN
NUMBER(10,5)
Arithmetic Standard
ANNUAL ARITH STDDV
NUMBER
Deviation
Geometric Standard
ANNUAL GEOM STDDV
NUMBER(12,5)
Deviation
Percent of Observations
ANNUAL OBS PCT
NUMBER(10,4)
Direct Entry Indicator
ANNUAL DIRECT ENTRY IND
VARCHAR2(3)
Count of Null Data Values
NULL DATA OBS CNT
NUMBER(10,0)
Count of Exceptional
Events
EXCEPTIONALDATACNT
NUMBER(10,0)
Certificate Indicator
CERT IND
VARCHAR2(3)
Count of Primary
Exceedances
VALUESGTPRILEVEL
NUMBER(10,0)
Counts of Half-MDL
OBS CNT LT HALF MDL
NUMBER(10,0)
Substitutions
Count of Secondary
Exceedances
VALUESGTSECLEVEL
NUMBER(10,0)
Count of Valid Days
VALID DAY CNT
NUMBER(3,0)
Count of Days Greater
than Alert Level
DAY SGTALERTLEVEL
NUMBER(3,0)
Count of Non-
NON OVERLAPPING AVG GT STD
NUMBER(10,0)
Overlapping Exceedances
Count of Missing Days
Assumed Less than
MIS SINGD AY S_AS SUMEDLTSTD
NUMBER(3,0)
Standard
Estimate of Days Greater
than Standard
ESTDAYSGTSTD
NUMBER(5,2)
Count of Required Days
REQ MONITORING CNT
NUMBER(3,0)
Weighted Arithmetic
WEIGHTED ARITH MEAN
NUMBER
Mean
Date of Last Update
LAST UPDATE DATE
DATE
Summary Scale
SUMMARY SCALE
NUMBER
Created User
CREATED USER
VARCHAR2(40)
Created Date
CREATED DATE
DATE
Modified User
MODIFIED USER
VARCHAR2(40)
Modified Date
MODIFIED DATE
DATE
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3.31 Site Daily Values
3.31.1 Description
The SiteDailyValues view contains daily values for PM2.5, lead, and other parameters at a
given site where the valid daily values from a site's primary sampler are combined with the
coalesced values from the same site's collocated samplers for any days the primary sampler
was not available. Daily values are combined for a site, day, and exceptional data indicator
combination.
A Site Daily Values record is uniquely identified by the combination of site key, parameter,
sample day, exceptional data type and pollutant standard ID. Its parent is the Sites view.
3.31.2 Elements
Name
Database Field
Type (Length)
Req'd
Key
Site Key
SI ID
NUMBER(10,0)
V
Parameter Code
PARAMETER CODE
VARCHAR2(5)
V
V
Sample Day
SAMPLE DAY
DATE
V
V
Exceptional Data Type ID
EDT ID
NUMBER(10,0)
V
V
Pollutant Standard
POLLUTANT STD ID
NUMBER
V
V
Duration Code
DURATION CODE
VARCHAR2(8)
Daily Value
DAILY VALUE
NUMBER
V
Source Indicator
SOURCE IND
VARCHAR2(1)
V
Created User
CREATED USER
VARCHAR2(30)
Created Date
CREATED DATE
DATE
Modified User
MODIFIED USER
VARCHAR2(30)
Modified Date
MODIFIED DATE
DATE
3.32 Site Quarterly Summaries
3.32.1 Description
The SiteQuarterlySummaries view contains calculated values of concentrations of monitor
samples at a given site, which have been summarized for a quarter, parameter and exceptional
data indicator combination. Site quarterly summaries are calculated only for pollutants for
which the attainment designation is per site (not per monitor). Currently, this applies only to
PM2.5 and lead.
A Site Quarterly Summaries record is uniquely identified by the combination of site key,
parameter, year, quarter, exceptional data type and pollutant standard ID. Its parent is the
Sites view.
Two exceptional event situations may exist: either exceptional event data is flagged or not.
No exceptional event data is flagged: This is the case where only type 0 (No Exceptional
Events) site-level daily summaries exist for the site and quarter. A single quarterly summary
row for the site and quarter is determined using site-level Quarterly Arithmetic Mean =
Average of all site-level daily values (on any day, not just scheduled days).
Exceptional event data is flagged: This is the case where site-level daily summaries with a
type=2 (Exceptional Events Included) or type=5 (Regionally concurred Exceptional Events
Excluded) exist. Three quarterly summary rows for the site and quarter are created:
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one with Exceptional Events Included (Site-level Quarterly Artithmetic Mean =
Average of all site-level daily values (on any day, not just scheduled days, and
exceptional data types 0 & 2)
one with all Exceptional Events excluded (Site-level Quarterly Arithmetic Mean =
Average of all site-level daily values (on any day, not just scheduled days, and
exceptional datatypes 0 & 1)
one with Regionally concurred Exceptional Events excluded. (Site-level Quarterly
Artithmetic Mean = Average of all site-level daily values (on any day, not just
scheduled days, with exceptional data type 0 OR exceptional data type 5 AND
Applicable Standard = "Annual")
3.32.2 Elements
Name
Database Field
Type (Length)
Req'd
Key
Site Key
SI ID
NUMBER(10,0)
7
V
Parameter Code
PARAMETER CODE
VARCHAR2(5)
v
V
Summary Year
SUMMARY YEAR
NUMBER(4,0)
v
V
Summary Quarter
SUMMARY QUARTER
NUMB ER( 1,0)
v
V
Exceptional Data Type ID
EDT ID
NUMBER(10,0)
V
V
Pollutant Standard
POLLUTANT STD ID
NUMBER
V
V
Arithmetic Mean
ARITH MEAN
NUMBER
Count of Creditable Samples
CRED SAMPLE CNT
NUMBER
Percent of Completeness
PCT COMPLETE
NUMBER(3,0)
Observation Count
PCT OBS
NUMBER
Substituted Mean
SUB ST MEAN
NUMBER
Created User
CREATED USER
VARCHAR2(30)
Created Date
CREATED DATE
DATE
Modified User
MODIFIED USER
VARCHAR2(30)
Modified Date
MODIFIED DATE
DATE
3.33 Site Annual Summaries
3.33.1 Description
The SiteAnnualSummaries view contains calculated values of concentrations of monitor
samples at a given site, which have been summarized for a year, parameter and exceptional
data indicator combination. Site annual summaries are calculated only for pollutants for
which the attainment designation is per site (not per monitor). Currently, this applies only to
PM2.5 and lead.
A Site Annual Summaries record is uniquely identified by the combination of site key,
parameter, year, exceptional data type and pollutant standard ID. Its parent is the Sites view.
3.33.2 Elements
Name
Database Field
Type (Length)
Req'd
Key
Site Key
SI ID
NUMBER(10,0)
7
V
Parameter Code
PARAMETER CODE
VARCHAR2(5)
v
V
Summary Year
SUMMARY YEAR
NUMBER(4,0)
V
V
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Exceptional Data Type ID
EDT ID
NUMBER(10,0)
Pollutant Standard
POLLUTANT STD ID
NUMBER
Weighted Arithmetic Mean
ARITH MEAN
NUMBER
Mean Completeness Indicator
ARITH MEAN COMPLET
E IND
VARCHAR2(1)
Substituted Annual Mean
SUB ST MEAN
NUMBER
Count of Creditable Samples
CRED SAMPLE CNT
NUMBER
98th Percentile
PERCENTILE 98TH
NUMBER
98th Percentile Completeness
Indicator
PERCENTILE 98TH COM
PLETE IND
VARCHAR2(1)
First Maximum
FIRST MAXIMUM
NUMBER
Second Maximum
SECOND MAXIMUM
NUMBER
Third Maximum
THIRD MAXIMUM
NUMBER
Fourth Maximum
FOURTH MAXIMUM
NUMBER
Created User
CREATED USER
VARCHAR2(30)
Created Date
CREATED DATE
DATE
Modified User
MODIFIED USER
VARCHAR2(30)
Modified Date
MODIFIED DATE
DATE
3.34 Site Design Values
3.34.1 Description
The Site DesignValues view contains average values of annual summaries at a given site,
which have been calculated for a three year period, parameter and exceptional data indicator
combination and pollutant standard ID.
A Site Design Values record is uniquely identified by the combination of site key,
parameter, design year and exceptional data type. Its parent is the Sites view.
3.34.2 Elements
Name
Database Field
Type (Length)
Req'd
Key
Site Key
SI ID
NUMBER(10,0)
7
V
Parameter Code
PARAMETER CODE
VARCHAR2(5)
v
V
Design Year
DESIGN YEAR
NUMBER(4,0)
v
V
Exceptional Data Type ID
EDT ID
NUMBER(10,0)
V
V
Pollutant Standard
POLLUTANT STD ID
NUMBER
V
V
Single-site Annual Standard
Design Value
ANNU ALDESIGNVALUE
NUMBER
Annual Standard Design Value
Validity Indicator
ANNU ALVALIDITYIND
VARCHAR2(1)
Substituted Annual Design
Value
SUB ST_ANNU AL_VALUE
NUMBER
24-Hour Standard Design
Value
24HOURDESIGNVALUE
NUMBER
24-Hour Design Value Validity
Indicator
24_HOUR_VALIDITY_IND
NUMBER
Created User
CREATED USER
VARCHAR2(30)
Created Date
CREATED DATE
DATE
Modified User
MODIFIED USER
VARCHAR2(30)
Modified Date
MODIFIED DATE
DATE
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3.35 Summary Maximums
3.35.1 Description
The SummaryMaximums view contains information about a predetermined number of the
highest values that were recorded by a monitor within a year.
A Summary Maximums record is uniquely identified by the combination of annual summary
key, indicator and level. Its parent is the AnnualSummaries view.
3.35.2 Elements
Name
Database Field
Type (Length)
Req'd
Key
Maximum Level
MAX LEVEL
NUMBER(4,0)
V
Maximum Value
MAX_SAMPLE_VALUE
NUMBER(10,5)
Maximum Indicator
MAX IND
VARCHAR2(3)
V
V
Maximum Value Date/Time
MAX COLL DATETIME
DATE
Annual Summary Key
ANS ANS ID
VARCHAR2(40)
V
V
Created User
CREATED USER
DATE
Created Date
CREATED DATE
VARCHAR2(40)
Modified User
MODIFIED USER
DATE
Modified Date
MODIFIED DATE
DATE
3.36 Summary Percentiles
3.36.1 Description
The SummaryPercentiles view contains information about predetermined percentiles that
were calculated for a monitor within a year.
A Summary Percentiles record is uniquely identified by the combination of annual summary
key and percentile. Its parent is the Annual Summaries view.
3.36.2 Elements
Name
Database Field
Type (Length)
Req'd
Key
Annual Summary Key
ANS ANS ID
NUMBER(10,0)
V
V
Percentile
PERCENTILE NUM
NUMBER(3,0)
V
V
Percentile Sample Value
PERCENTILE SAMPLE VALUE
NUMBER(10,5)
Created User
CREATED USER
VARCHAR2(40)
Created Date
CREATED DATE
DATE
Modified User
MODIFIED USER
VARCHAR2(40)
Modified Date
MODIFIED DATE
DATE
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3.37 Summary Protocols
3.37.1 Description
The SummaryProtocols view documents the protocols that were used for a monitor within a
year.
A Summary Protocols record is uniquely identified by the combination of monitor, year,
duration, exceptional data type, and monitor protocol. Its parent is the AnnualSummaries
view.
3.37.2 Elements
Name
Database Field
Type (Length)
Req'd
Key
Tribal Monitor ID
TRIBAL MONITOR ID
CHARACTER (20)
Monitor ID
MONITOR ID
CHARACTER (20)
V
V
Summary Year
ANNUAL SUMMARY YEAR
NUMBER (4.0)
V
V
Duration Code
DURATION CODE
CHARACTER (8)
V
V
Exceptional Data Type ID
EDT ID
NUMBER (10.0)
V
V
Monitor Protocol ID
MP ID
NUMBER (4.0)
V
V
3.38 Monitor Precision Summaries
3.38.1 Description
The MonitorPrecisionSummaries view contains information about yearly and quarterly
precision statistics for monitors for a pollutant by a reporting organization. Types of
information that are calculated are: number of checks, mean, standard deviation, and number
of valid collocated sample pairs.
A Monitor Precision Summaries record is uniquely identified by the combination of monitor,
reporting organization, class and time period. Its parent is the Monitor Agency Roles view;
its child view is PrecisionSummaryProtocols. (Note: Precision Summaries are only
calculated for data collected up to 12/31/2006.)
3.38.2 Elements
Name
Database Field
Type (Length)
Req'd
Key
Tribal Monitor ID
TRIBAL MONITOR ID
CHARACTER (20)
V
Monitor ID
MONITOR ID
CHARACTER (20)
V
V
Reporting Organization
AGENCY CODE
CHARACTER (8)
V
V
Precision Class
AUDIT CLASS
CHARACTER (20)
V
V
Summary Year
PREC YEAR
NUMBER (4.0)
V
V
Time Period
TIME PERIOD
CHARACTER (2)
V
V
Recording Mode
RECORDING MODE
CHARACTER (30)
V
Mean
PREC MEAN
NUMBER (6.4)
V
Standard Deviation
PREC STDDV
NUMBER (6.4)
V
Count of Precision Checks
PREC CHECK CNT
NUMBER (3.0)
V
Count of Valid Collocated
VALID CLOC DATA PAIR CNT
NUMBER (3.0)
V
Data Pairs
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3.39 Precision Summary Protocols
3.39.1 Description
The PrecisionSummaryProtocols view contains information about the protocols used to
assess precision checks for a monitor for a year by a reporting organization.
A Precision Summary Protocols record is uniquely identified by the combination of monitor,
reporting organization, class, time period, and monitor protocols. Its parent is the
MonitorPrecisionSummaries view. (Note: Precision Summaries are only calculated for data
collected up to 12/31/2006.)
3.39.2 Elements
Name
Database Field
Type (Length)
Req'd
Kev
Tribal Monitor ID
TRIBAL MONITOR ID
CHARACTER (20)
V
Monitor ID
MONITOR ID
CHARACTER (20)
V
V
Reporting Organization
AGENCY CODE
CHARACTER (8)
V
V
Precision Class
AUDIT CLASS
CHARACTER (20)
V
V
Summary Year
PREC YEAR
NUMBER (4.0)
V
V
Time Period
TIME PERIOD
CHARACTER (2)
V
V
Monitor Protocol ID
MP ID
NUMBER (4.0)
V
V
3.40 Reporting Organization Precision Summaries
3.40.1 Description
The ReportingOrganizationPrecisionSummaries view contains information about yearly
and quarterly precision statistics for reporting organizations and pollutants. Types of
information that are calculated are: number of checks, mean, standard deviation, number of
valid collocated sample pairs, and lower and upper probability limits or confidence intervals.
A ReportingOrganizationPrecisionSummaries record is uniquely identified by the
combination of reporting organization, parameter, class and time period. Its parent is the
AgenciesandParameters views. (Note: Precision Summaries are only calculated for data
collected up to 12/31/2006.)
3.40.2 Elements
Name
Database Field
Type (Length)
Req'd
Key
Reporting Organization
AGENCY CODE
CHARACTER (8)
V
Parameter
PARAMETER CODE
CHARACTER (5)
V
V
Precision Class
AUDIT CLASS
CHARACTER (20)
V
V
Summary Year
PREC YEAR
NUMBER (4.0)
V
V
Time Period
TIME PERIOD
CHARACTER (2)
V
V
Recording Mode
RECORDING MODE
CHARACTER (30)
V
Mean
PREC MEAN
NUMBER (6.4)
V
Standard Deviation
PREC STDDV
NUMBER (6.4)
Count of Precision Checks
PREC CHECK CNT
NUMBER (3.0)
V
Count of Valid Collocated
Data Pairs
VALIDCLOCD AT A_P AIRCNT
NUMBER (3.0)
Count of Analyzers
ANALYZER CNT
NUMBER (12.0)
V
Count of Collocated Sites
CLOC SITE CNT
NUMBER (12.0)
V
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Name
Database Field
Type (Length)
Req'd
Key
Lower
Probability/Confidence
Limit
PRECLO WERPROB LIMIT
NUMBER (6.4)
Upper
Probability/Confidence
Limit
PRECUPPERPROBLIMIT
NUMBER (6.4)
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3.41 Monitor Accuracy Summaries
3.41.1 Description
The MonitorAccuracySummaries view contains information about yearly and quarterly
accuracy statistics for reporting organizations and pollutants. Types of information that are
calculated are: number of audits.
A MonitorccuracySummaries record is uniquely identified by the combination of monitor,
reporting organization, class, type, and time period. Its parent is the Agencies Roles view; its
child view is AccuracySummaryProtocols. (Note: Accuracy Summaries are only calculated
for data collected up to 12/31/2006.)
3.41.2 Elements
Name
Database Field
Type (Length)
Req'd
Key
Tribal Monitor ID
TRIBAL MONITOR ID
CHARACTER (20)
a/
Monitor ID
MONITOR ID
CHARACTER (20)
V
V
Reporting Organization
AGENCY CODE
CHARACTER (8)
V
V
Recording Mode
RECORDING MODE
CHARACTER (30)
V
V
Audit Class
AUDIT CLASS
CHARACTER (20)
V
V
Accuracy Type
ACC TYPE
CHARACTER (20)
V
V
Summary Year
ACC SUMMARY YEAR
NUMBER (4)
V
V
Time Period
TIME PERIOD
CHARACTER (2)
V
V
Local Primary Standard
LOCAL PRI STD
CHARACTER (30)
V
Audit Type
AUDIT TYPE
CHARACTER (30)
V
Audit Level
LEVEL NUM
NUMBER (2)
V
Count of Accuracy
Audits
AUDITCNT
NUMBER (12)
V
Mean
ACC MEAN
NUMBER (5.5)
3.42 Accuracy Summary Protocols
3.42.1 Description
The Accuracy Summary Protocols view documents the protocols used to collect accuracy
audits for a monitor for a year or quarter.
An Accuracy Summary Protocols record is uniquely identified by the combination of
monitor, reporting organization, class, type, time period, and monitor protocol. Its parent is
the Monitor_Accuracy_Summaries view. (Note: Accuracy Summaries are only calculated for
data collected up to 12/31/2006.)
3.42.2 Elements
Name
Database Field
Type (Length)
Req'd
Key
Tribal Monitor ID
TRIBAL MONITOR ID
CHARACTER (20)
a/
Monitor ID
MONITOR ID
CHARACTER (20)
V
V
Reporting Organization
AGENCY CODE
CHARACTER (8)
V
V
Recording Mode
RECORDINGMODE
CHARACTER (30)
V
V
Audit Class
AUDIT CLASS
CHARACTER (20)
V
V
Accuracy Type
ACC TYPE
CHARACTER (20)
V
V
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Name
Database Field
Type (Length)
Req'd
Key
Summary Year
ACC SUMMARY YEAR
NUMBER (4)
V
a/
Time Period
TIME PERIOD
CHARACTER (2)
V
V
Monitor Protocol ID
MP ID
NUMBER (4)
V
V
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3.43 Reporting Organization Accuracy Summaries
3.43.1 Description
The ReportingOrganizationAccuracySummaries view contains information about yearly
and quarterly accuracy statistics for reporting organizations and pollutants. Types of
information that are calculated are: number of audits, mean, standard deviation, and lower and
upper probability limits or confidence intervals.
A ReportingOrganizationAccuracySummaries record is uniquely identified by the
combination of reporting organization, parameter, recording mode, class, type, and time
period. Its parent is the AgenciesandParameters views. (Note: Accuracy Summaries are
only calculated for data collected up to 12/31/2006.)
3.43.2 Elements
Name
Database Field
Type (Length)
Req'd
Key
Reporting Organization
AGENCY CODE
CHARACTER (8)
V
V
Parameter
PARAMETER CODE
CHARACTER (5)
V
V
Recording Mode
RECORDING MODE
CHARACTER (30)
V
V
Audit Class
AUDIT CLASS
CHARACTER (20)
V
V
Accuracy Type
ACC TYPE
CHARACTER (20)
V
V
Summary Year
ACC SUMMARY YEAR
NUMBER (4)
V
V
Time Period
TIME PERIOD
CHARACTER (2)
V
V
Local Primary Standard
LOCALPRISTD
CHARACTER (30)
V
Audit Type
AUDITTYPE
CHARACTER (30)
V
Audit Level
LEVEL_NUM
NUMBER (2)
V
Count of Accuracy Audits
AUDITCNT
NUMBER (12)
V
Mean
ACCMEAN
NUMBER (5.5)
Standard Deviation
ACC STDDV
NUMBER (7.5)
Lower Probability/Confidence
Limit
ACCLOWERPROBLIMIT
NUMBER (6.4)
Upper Probability/Confidence
Limit
ACCUPPERPROBLIMIT
NUMBER (6.4)
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4 AQS Data Fields
4.1 98th Percentile Completeness Indicator (Annual)
4.1.1 Description
Flag indicating whether the annual 98th percentile is complete.
4.1.2 Source
System generated during Post process
4.1.3 Attributes
Type: Varchar2
Length: 1
Required: No
4.1.4 Uses
Site Annual Summaries
4.1.5 Value Assignment
4.1.5.1 Site-Level PM2.5
The valid values are "Y" and "N". Set to valid (i.e. ' Y') according to the following rules:
All 4 site-level quarterly summaries are present, and
One of the following is true:
o All 4 quarters are 75% complete, or
o Annual 98th percentile value greater than the 24-hour standard (35 ug/m3).
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4.2 A ecu racy A udit ID Number
4.2.1 Description
A sequentially assigned number used to identify a unique measurement data group for a
monitor on a specific date.
4.2.2 Source
User-specified, via Accuracy Data (RA) Transaction, or AQS Maintain Accuracy (L62).
4.2.3 Attributes
Type: Number
Length: 2.0
Required: Yes
4.2.4 Uses
Accuracy Data
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4.3 Accuracy Date
4.3.1 Description
The calendar date for which the accuracy audit information pertains.
4.3.2 Source
User-specified, via Accuracy Data (RA) Transaction, or AQS Maintain Accuracy (L62).
4.3.3 Attributes
Type: Date
Length: Not Applicable
Required: Yes
4.3.4 Uses
Accuracy Data
4.3.5 Value Assignment
The field is only assigned a date, with the time portion defaulting to 00:00:00.
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4.4 Accuracy Type
4.4.1 Description
A description of the type of accuracy test performed.
4.4.2 Source
User-specified, via Accuracy Data (RA) Transaction, or AQS Maintain Accuracy (L62).
4.4.3 Attributes
Type: Character
Length: 20
Required: Yes
4.4.4 Uses
Accuracy Data
Monitor Accuracy Summaries
Accuracy Summary Protocols
Reporting Organization Accuracy Summaries
4.4.5 Value Assignment
4.4.5.1 Accuracy Data
Must be an entry in the Accuracy Types view.
4.4.5.2 Monitor & Reporting Organization Accuracy Summaries
Represents the Accuracy Type value assigned to all Accuracy Data records that are aggregated
in the summary record.
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4.5 Action Date
4.5.1 Description
The date that administrative action was taken by EPA headquarters.
4.5.2 Source
User-specified, via the Maintain Monitor form.
4.5.3 Attributes
Type: Date
Length: Not Applicable
Required: No
4.5.4 Uses
Monitor Type Assignments
4.5.5 Value Assignment
Applies only to the assignment of the monitor types National Air Monitoring Station (NAMS)
or Photochemical Assessment Monitoring System (PAMS).
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4.6 Action Indicator
4.6.1 Description
Indicates the data manipulation action to be performed by the transaction.
4.6.2 Source
User-specified, via Raw Data (RD) or Composite Data (RC) Transactions, or AQS Maintain
Raw Data (L54) or Maintain Composite Data (L51).
4.6.3 Attributes
Type: Character
Length: 1
Required: No
4.6.4 Uses
Raw Data
Composite Data
4.6.5 Value Assignment
4.6.5.1 Pre-Production Status
A value is required when the Raw Data or Composite Data record is at pre-production status,
(i.e., the Status Indicator value is "R" or "S"). The valid values are:
4.6.5.2 Production Status
The field must be null when the Raw Data or Composite Data record is at production status,
(i.e., the Status Indicator value is "P").
I - Insert
U - Update
D - Delete
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4.7 Action Reason
4.7.1 Description
A code indicating the reason for negative actions by EPA headquarters with regard to a
monitor.
4.7.2 Source
User-specified, via the Maintain Monitor form.
4.7.3 Attributes
Type: Character
Length: 8
Required: No
4.7.4 Uses
Monitor Type Assignments
4.7.5 Value Assignment
Must be an entry in the Action Reasons view.
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4.8 Action Type
4.8.1 Description
The type of administrative action taken by EPA headquarters.
4.8.2 Source
User-specified, via the Maintain Monitor form.
4.8.3 Attributes
Type: Character
Length: 8
Required: No
4.8.4 Uses
Monitor Type Assignments
4.8.5 Value Assignment
Must be an entry in the Action Types view.
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4.9 Actual Method
4.9.1 Description
Identifies the particular method for collecting and analyzing a precision check value.
4.9.1.1 Analytical
The method used to collect and analyze the known gaseous concentration with which the
sampler is challenged.
4.9.1.2 Flow
The method used to collect and analyze the known flow rate with which the sampler is
challenged.
4.9.1.3 Collocated
The method used to collect and analyze the ambient air sample from the primary sampler.
4.9.2 Source
User-specified, via Precision Data (RP) Transaction, or AQS Maintain Precision (L61).
4.9.3 Attributes
Type: Character
Length: 3
Required: Yes
4.9.4 Uses
Precision Data
4.9.5 Value Assignment
The Actual Method value, in combination with the Parameter value, must exist in the
Sampling Methodologies view.
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4.10 Actual Value
4.10.1 Description
4.10.1.1 Analytical
The standard gaseous concentration value with which the sampler is challenged.
4.10.1.2 Flow
The standard flow rate value with which the monitor is challenged.
4.10.1.3 Collocated
The concentration produced from the primary sampler, (i.e., routine monitor), in a collocated
sampler pair.
4.10.2 Source
For a precision check, user-specified, via Precision Data (RP) Transaction, or AQS Maintain
Precision (L61). For an accuracy audit, user-specified, via Accuracy Data (RA) Transaction,
or AQS Maintain Accuracy (L62).
4.10.3 Attributes
Type: Number
Length: 5.5
Required: Yes
4.10.4 Uses
Precision Data
Accuracy Data
4.10.5 Value Assignment
4.10.5.1 Analytical Check
The Actual Value for a precision check must not exceed the maximum value allowed for the
Parameter.
4.10.5.2 Analytical Audit
The Actual Value for an analytical audit must fall within the range of standard concentrations
specified for the Parameter at the given Audit Level.
4.10.5.3 Collocated Check
Thq Actual Value for a precision check must not exceed the maximum value allowed for the
Parameter.
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4.11 Agency Code
4.11.1 Description
An agency responsible for performing a role for the monitor.
4.11.2 Source
User-specified, via Basic Site Information (AA) transaction or The Maintain Site form..
User-specified, via Monitor Agency Roles (MD) Transaction, or the Maintain Monitor form.
4.11.3 Attributes
Type: Character
Length: 8
Required: Yes
4.11.4 Uses
Monitor Agency Roles
4.11.5 Value Assignment
Must be an entry on the Agencies view, and, in combination with State Code, on the State
Agencies view.
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4.12 Agency Performing FRM Audit
4.12.1 Description
The agency submitting precision data resulting from a Federal Reference Method (FRM)
audit of the manual method for Particulate Matter (PM)-2.5 monitoring. This agency is
commonly an Environmental Protection Agency (EPA) laboratory or independent laboratory.
4.12.2 Source
User-specified, via Precision Data (RP) Transaction, or AQS Maintain Precision (L61).
4.12.3 Attributes
Type: Character
Length: 8
Required: No
4.12.4 Uses
Precision Data
4.12.5 Value Assignment
The Agency Performing FRM Audit value must exist on the Agencies view.
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4.13 Agency Role Begin Date
4.13.1 Description
The date on which the agency began performance of the role for the monitor. For the role of
reporting, it also indicates the date that precision and accuracy data applies to the agency as
reporting organization.
4.13.2 Source
User-specified, via Monitor Agency Roles (MD) Transaction, or the Maintain Monitor form.
4.13.3 Attributes
Type: Date
Length: Not Applicable
Required: Yes
4.13.4 Uses
Monitor Agency Roles
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4.14 Agency Role End Date
4.14.1 Description
The date on which the agency ended a period of performance of the role for the monitor. For
the role of reporting, it also indicates the last date that precision and accuracy data applies to
the agency as reporting organization.
4.14.2 Source
User-specified, via Monitor Agency Roles (MD) Transaction, or the Maintain Monitor form.
4.14.3 Attributes
Type: Date
Length: Not Applicable
Required: No
4.14.4 Uses
Monitor Agency Roles
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4.15 Agency Role Name
4.15.1 Description
Classification of an agency's role in regard to the monitor.
4.15.2 Source
User-specified, via Monitor Agency Roles (MD) Transaction, or the Maintain Monitor form.
4.15.3 Attributes
Type: Character
Length: 20
Required: Yes
4.15.4 Uses
Monitor Agency Roles
4.15.5 Value Assignment
Must be "PQAO", "REPORTING", "COLLECTING", or "ANALYZING".
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4.16 Alternate Method Detectable Limit
4.16.1 Description
The method detectable limit (MDL) defined for the monitor by the QA agency, which
supercedes the EPA-defined method detectable limit for the designated methodology.
4.16.2 Source
User-specified, via the Raw Data (RD), Composite Data (RC), or Monitor Protocols (MK)
Transactions (), or via Maintain Monitor (L2).
4.16.3 Attributes
Type: Number
Length: 5.5
Required: No
4.16.4 Uses
Monitor Protocols
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4.17 Applicable NAA QS Indicator
4.17.1 Description
An indication of whether the data from a monitor in a monitor planning area should be
compared to either the short-term or annual National Ambient Air Quality Standards
(NAAQS), or both.
4.17.2 Source
User-specified, via Basic Monitor Information (MA) Transaction, or the Maintain Monitor
form.
4.17.3 Attributes
Type: Character
Length: 3
Required: No
4.17.4 Uses
Monitor Pollutant Areas
4.17.5 Value Assignment
The valid values are:
S - Short-Term
A - Annual
B - Both
4.17.5.1 Monitor Pollutant Areas
Applicable NAAQS Indicator is required for Monitor Planning Areas (PM2.5).
4.17.5.2 Default
Applicable NAAQS Indicator is not allowed for other than Monitor Planning Areas (PM2.5).
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4.18 AQCR
4.18.1 Description
Specifies in which of the 247 Air Quality Control Regions (AQCRs) the monitoring site is
located.
4.18.2 Source
User-specified via the Basic Site Information (AA) Transaction, or The Maintain Site form..
4.18.3 Attributes
Type: Character
Length: 8
Required: No
4.18.4 Uses
Sites
4.18.5 Value Assignment
Must be a value on the AQCR view, and, in combination with the State Code and County Code,
on the AQCR Counties view.
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4.19 AQI Value
4.19.1 Description
The Air Quality Index (AQI) is a measure for reporting daily air quality. It focuses on health
effects that may be experienced within a few hours or days after breathing polluted air. AQI
is calculated for the following major air pollutants regulated by the Clean Air Act: Ozone,
PM 2.5, PM 10, carbon monoxide, sulfur dioxide, and nitrogen dioxide. The AQI is a
mapping from pollutant concentrations to the common index. The index is based on defining
seven levels of concentration/index values that are classified as follows:
Good (with AQI values from 0 to 50),
Moderate (with AQI values from 51 to 100),
Unhealthy for Sensitive Groups (with AQI values from 101 to 150),
Unhealthy (with AQI values from 151 to 200),
Very Unhealthy (with AQI values from 201 to 300),
Hazardous (with AQI values from 301 to 400),
Very Hazardous (with AQI values from 401 to 500).
The upper and lower bounds of each AQI level classification are called "breakpoints" for the
level. The EPA defines specific pollutant concentrations to be associated with each breakpoint;
e.g. for Ozone, the "Moderate" classification level has the concentration of 0.060 ppm associated
with its lower AQI value of 50, and the concentration of 0.075 associated with its higher AQI
value of 100. AQI values in this concentration range are then computed by linear interpolation
(by the formula provided later in this requirements document).
4.19.2 Source
System-generated during the Post process
4.19.3 Attributes
Type: Number
Required: No
4.19.4 Uses
Daily Summaries
4.19.5 Value Assignment
4.19.5.1 PM2.5
Air Quality Index Formula:
Within the concentration range of a classification, the AQI value for a pollutant concentration
shall be computed by linear interpolation as per the following formula:
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ff
AQI =
I
Hghi
I
Low
yyBPHigf, BPLow j
x
(Cone - BPLow )
+ /
Low
Where:
Cone is the concentration of the pollutant
I High is the AQI value of the upper breakpoint of the level
I Low is the AQI value of the lower breakpoint of the level
BP High is the concentration associated with the upper breakpoint of the level
BPlow is the concentration associated with the upper breakpoint of the level
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4.20 Arithmetic Mean (Annual)
4.20.1 Description
The measure of central tendency obtained from the sum of the observed pollutant data values
or National Ambient Air Quality Standards (NAAQS) averages in the yearly data set divided
by the number of values that comprise the sum for the yearly data set. For criteria pollutants,
the sum of values only adds the values with the appropriate flagging and concurrence for the
exceptional data type.
4.20.2 Source
System-generated during the Post process, or user-specified via the Annual Summaries (RS)
Transaction () or Maintain Annual Summaries (L9).
4.20.3 Attributes
Type: Number
Length: 5.5
Required: No
4.20.4 Uses
Annual Summaries
Site Annual Summaries
4.20.5 Value Assignment
4.20.5.1 1-Hour & 8-Hour Ozone
u = mean,
d = valid 1-hour or 8-hour daily maximum occurring in effective monitoring season,
v = Count of Valid Days.
The arithmetic mean is the sum of (Daily Maximum Values in the Effective Monitoring Season)
/ Number of Valid Days.
Format: Rounded to 4 digits after the decimal.
Sum of values only adds the values with the appropriate flagging and concurrence for the
exceptional data type.
where:
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4.20.5.2 Non-Ozone National Ambient Air Quality Standards (NAAQS) Durations
Not valued.
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4.20.5.3 Default
U -
where:
u = mean,
5 = sample value,
n = Count of Observations (Annual).
The arithmetic mean is the sum of (Values) / Count of Observations, where:
Ś Sum of values only adds the values with the appropriate flagging and concurrence for the
exceptional data type.
Ś Count of Observations: Count of values (sample measurements or valid days - pollutant
specific) with the appropriate flagging and concurrence for the exceptional data type
(EDT ID) of the summary. Note: samples with null data codes (i.e. with no measurement
value) are not included in the count.
Format: Rounded to 1 place greater than the minimum summary scale (for output purposes).
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4.21 Arithmetic Mean (Daily)
4.21.1 Description
The measure of central tendency obtained from the sum of the observed pollutant data values
or National Ambient Air Quality Standards (NAAQS) averages in the daily data set divided
by the number of values that comprise the sum for the daily data set. For criteria pollutants,
the sum of values only adds the values with the appropriate flagging and concurrence for the
exceptional data type.
4.21.2 Source
System-generated during the Post process.
4.21.3 Attributes
Type: Number
Length: 5.5
Required: No
4.21.4 Uses
Daily Summaries
4.21.5 Value Assignment
4.21.5.1 Hourly & NAAQS Durations
where:
u = mean,
5 = sample value or valid NAAQS Arithmetic Mean,
n = Count of Observations (Daily).
4.21.5.2 Daily Criteria
U = S
where:
u = mean,
5 = sample value.
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4.22 Arithmetic Mean (NAAQS)
4.22.1 Description
The measure of central tendency obtained from the sum of the observed pollutant data values
in National Ambient Air Quality Standards (NAAQS) hourly interval divided by the number
of values that comprise the sum for the NAAQS hourly interval. For criteria pollutants, the
sum of values only adds the values with the appropriate flagging and concurrence for the
exceptional data type.
4.22.2 Source
System-generated during the Post process.
4.22.3 Attributes
Type: Number
Length: 10.5
Required: Yes
4.22.4 Uses
NAAQS Averages
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4.22.5 Value Assignment
4.22.5.1 8-Hour Ozone
Where there are between 6 and 8 hourly samples in an 8-hour period, (i.e. at least 75% of the
required data is present):
u = arithmetic mean,
5 = sample value,
n = number of samples.
Where there are less than 6 samples in an 8-hour period, (i.e. at least 75% of the required data
is not present):
u= arithmetic mean,
5 = 1-hour sample value,
h = '/2 method detectable limit (MDL) substitution,
n = number of 1-hour sample values,
and u exceeds the standard.
Sum of values only adds the values with the appropriate flagging and concurrence for the
exceptional data type.
where:
8
where:
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4.22.5.2 8-Hour Carbon Monoxide
Where there are between 6 and 8 samples in an 8-hour period, (i.e. at least 75% of the
required data is present):
U= Yj '
j= 1
n
where:
u = arithmetic mean,
5 = sample value,
n = number of sample values.
Sum of values only adds the values with the appropriate flagging and concurrence for the
exceptional data type.
4.22.5.3 3-Hour Sulfur Dioxide
When there are 3 hourly samples in a 3-hour block:
where:
u= arithmetic mean,
5 = 1-hour sample value,
n = number of 1-hour sample values,
and u exceeds the secondary standard.
where:
u = arithmetic mean,
5 = sample value.
When there less than 3 hourly samples in a 3-hour block:
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Sum of values only adds the values with the appropriate flagging and concurrence for the
exceptional data type.
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4.22.5.4 24-Hour Sulfur Dioxide
When there are between 18 and 24 hourly samples in an 24-hour period, (i.e. at least 75% of
the required data is present):
U= Yj '
j= 1
n
where:
u = arithmetic mean,
5 = sample value,
n = number of samples.
When there are less than 18 hourly samples in a 24-hour period:
where:
u= arithmetic mean,
5 = sample value,
n = number of samples,
and u exceeds the primary standard.
Sum of values only adds the values with the appropriate flagging and concurrence for the
exceptional data type.
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4.22.5.5 24-Hour PM10
Where there are between 18 and 24 hourly samples in an 24-hour period, (i.e. at least 75% of
the required data is present):
where:
u = arithmetic mean,
5 = 1-hour sample value,
n = number of 1-hour sample values.
Where there are less than 18 hourly samples in a 24-hour period:
where:
u= arithmetic mean,
5 = 1-hour sample value,
n = number of 1-hour sample values,
and w, when rounded to -1 places, (i.e., to the nearest 10), exceeds the primary standard.
Sum of values only adds the values with the appropriate flagging and concurrence for the
exceptional data type.
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4.22.5.6 24-Hour PM2.5
Where there are between 18 and 24 hourly samples based on the appropriate exceptional data
type in a 24-hour period, (i.e. at least 75% of the required data is present):
where:
u = arithmetic mean,
5 = 1-hour sample value,
n = number of 1-hour sample values.
Where there are less than 18 hourly samples in a 24-hour period:
where:
u= arithmetic mean,
5 = 1-hour sample value,
n = number of 1-hour sample values,
and w, when rounded to zero places, i.e., to the nearest integer, exceeds the primary standard.
Sum of values only adds the values with the appropriate flagging and concurrence for the
exceptional data type.
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4.23 Arithmetic Mean (Quarterly)
4.23.1 Description
The measure of central tendency obtained from the sum of the observed pollutant data values
in the quarterly data set divided by the number of values that comprise the sum for the
quarterly data set. For criteria pollutants, the sum of values only adds the values with the
appropriate flagging and concurrence for the exceptional data type.
4.23.2 Source
System-generated during the Post process.
4.23.3 Attributes
Type: Number
Length: 5.5
Required: No
4.23.4 Uses
Quarterly Summaries
Site Quarterly Summaries
4.23.5 Value Assignment
4.23.5.1 Hourly & NAAQS Durations
where:
u = mean,
5 = sample value or valid NAAQS Arithmetic Mean,
n = Count of Observations (Quarterly).
4.23.5.2 Site-Level PM2.5
where:
u = mean,
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5 = site-level daily value, based on appropriate exceptional data type, on any day not just
scheduled day
n = Count of Observations (Quarterly).
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4.24 Arithmetic Standard Deviation
4.24.1 Description
The measure of the dispersion about the central tendency of a pollutant that is the square root
of the arithmetic mean of the squares of the variation of each data value from the arithmetic
mean of the data values of the yearly data set.
4.24.2 Source
System-generated during the Post process, or user-specified via the Annual Summaries (RS)
Transaction () or Maintain Annual Summaries (L9).
4.24.3 Attributes
Type: Number
Length: 5.5
Required: No
4.24.4 Uses
Annual Summaries
4.24.5 Value Assignment
4.24.5.1 1-Hour & 8-Hour Ozone
(( v >
( V >
\
?,
-
la
V
V 7=1 )
V 7 = 1 )
)
(v *(v-
D)
where:
1.
If the number of valid days is exactly 1, then the standard deviation is assigned a value of 0.
4.24.5.2 Non-Ozone National Ambient Air Quality Standards (NAAQS) Durations
No value assigned.
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4.24.5.3 Default
(f ť >
f n >
\
?,
n*Yj sf
-
V
V 7=1 )
V 7=1 )
y
D)
where:
1.
If the number of samples is exactly 1, then the standard deviation is assigned a value of 0.
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4.25 Audit Class
4.25.1 Description
Description of the class of audit taken at the monitor.
4.25.2 Source
User-specified via Accuracy Data (RA) Transaction, or AQS Maintain Accuracy (L62), or
system-generated via Accuracy Data (RA) Transaction, or AQS Maintain Accuracy (L62).
4.25.3 Attributes
Type: Character
Length: 20
Required: Yes
4.25.4 Uses
Accuracy Data
Monitor Accuracy Summaries
Accuracy Summary Protocols
Reporting Organization Accuracy Summaries
4.25.5 Value Assignment
4.25.5.1 Accuracy Data
Must be a value on the Audit Classes view.
4.25.5.2 Monitor & Reporting Organization Accuracy Summaries
Represents the Audit Class value assigned to all Accuracy Data records that are aggregated in
the summary record.
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4.26 Audit Level
4.26.1 Description
A number identifying a regulatory-specified concentration range for the Parameter, or, when
there is no level defined, a sequential identifier use to differentiate multiple value pairs in an
accuracy audit.
4.26.2 Source
Derived from User-specified via the Accuracy Data (RA) Transaction, or AQS Maintain
Accuracy (L62).
4.26.3 Attributes
Type: Date
Length: Not Applicable
Required: Yes
4.26.4 Uses
Accuracy Data
4.26.5 Value Assignment
The values of Audit Level are derived from Level n fields on the RA transaction, with Other
Level being assigned a value of 5. From Maintain Accuracy (L62), the levels are explicitly
entered by the user.
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4.27 Audit Sample ID
4.27.1 Description
The unique identity (ID) number of the reference sample used to challenge the instrument.
4.27.2 Source
User-specified via the Accuracy Data (RA) Transaction, or AQS Maintain Accuracy (L62).
4.27.3 Attributes
Type: Character
Length: 10
Required: No
4.27.4 Uses
Accuracy Data
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4.28 Audit Scale
4.28.1 Description
The number of digits to the right of the decimal point of the accuracy audit.
4.28.2 Source
Derived from User-specified via the Accuracy Data (RA) Transaction, or AQS Maintain
Accuracy (L62).
4.28.3 Attributes
Type: Number
Length: 1
Required: Yes
4.28.4 Uses
Accuracy Data
4.28.5 Value Assignment
The value is derived from the number of digits to the right of the decimal point for the
corresponding audit value pair in the Accuracy Data (RA) Transaction, or on the L62 form.
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4.29 Audit Scheduled
4.29.1 Description
The initial date that the performance audit was scheduled.
4.29.2 Source
User-specified via the Accuracy Data (RA) Transaction, or AQS Maintain Accuracy (L62).
4.29.3 Attributes
Type: Date
Length: Not Applicable
Required: No
4.29.4 Uses
Accuracy Data
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4.30 Audit Type
4.30.1 Description
Description of who performed the audit and how the audit standard was certified.
4.30.2 Source
User-specified via the Accuracy Data (RA) Transaction, or AQS Maintain Accuracy (L62).
4.30.3 Attributes
Type: Character
Length: 20
Required: Yes
4.30.4 Uses
Accuracy Data
Monitor Accuracy Summaries
Reporting Organization Accuracy Summaries
4.30.5 Value Assignment
4.30.5.1 Accuracy Data
Must be a value on the Audit Types view.
4.30.5.2 Monitor & Reporting Organization Accuracy Summaries
The most frequently assigned audit type for accuracy audits aggregated in the summary
record.
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4.31 Beam Length
4.31.1 Description
The length of the beam projected between the transmitter and the receiver at the site, in
meters.
4.31.2 Source
User-specified via the Open Paths (AC) Transaction, or The Maintain Site form..
4.31.3 Attributes
Type: Number
Length: 8.2
Required: Yes
4.31.4 Uses
Open Paths
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4.32 Blank Date
4.32.1 Description
The calendar date at which the blank data was recorded.
4.32.2 Source
User-specified via the Blank Data (RB) Transaction, or AQS Maintain Blank Data (L53).
4.32.3 Attributes
Type: Date
Length: 8
Required: Yes
4.32.4 Uses
Forms and Reports
4.32.5 Value Assignment
On input: Coupled with Blank Time to set Blank Date/Time
On output: Extracted from Blank Date/Time
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4.33 Blank Date/Time
4.33.1 Description
The calendar date and time at which the blank data was recorded.
4.33.2 Source
User-specified via the Blank Data (RB) Transaction, or AQS Maintain Blank Data (L53).
4.33.3 Attributes
Type: Date
Length: Not Applicable
Required: Yes
4.33.4 Uses
Blank Data
Blank Qualifier Details
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4.34 Blank Scale
4.34.1 Description
The number of digits to the right of the decimal point of the blank value.
4.34.2 Source
User-specified via the Blank Data (RB) Transaction, or AQS Maintain Blank Data (L53).
4.34.3 Attributes
Type: Number
Length: 1
Required: Yes
4.34.4 Uses
Blank Data
4.34.5 Value Assignment
The value is derived from the number of digits to the right of the decimal point in the Blank
Data (RB) Transaction, or on the L53 form.
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4.35 Blank Time
4.35.1 Description
The 24 hour clock time at which the blank data was recorded.
4.35.2 Source
User-specified via the Blank Data (RB) Transaction, or AQS Maintain Blank Data (L53).
4.35.3 Attributes
Type: Date
Length: 5
Required: Yes
4.35.4 Uses
Forms and Reports
4.35.5 Value Assignment
On input: Coupled with Blank Time to set Blank Date/Time
On output: Extracted from Blank Date/Time
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4.36 Blank Type
4.36.1 Description
The type of blank data being recorded.
4.36.2 Source
User-specified via Blank Data (RB) Transaction, or AQS Maintain Blank Data (L53).
4.36.3 Attributes
Type: Character
Length: 20
Required: Yes
4.36.4 Uses
Blank Data
Blank Qualifier Details
4.36.5 Value Assignment
Must be a value on the Blank Types view, (i.e., "TRIP" or "FIELD").
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4.37 Blank Value
4.37.1 Description
The reported blank value.
4.37.2 Source
User-specified via Blank Data (RB) Transaction, or AQS Maintain Blank Data (L53).
4.37.3 Attributes
Type: Number
Length: 5.5
Required: No
4.37.4 Uses
Blank Data
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4.38 CBSA Represented
4.38.1 Description
The Core Based Statistical Area (CBSA) from which the concentrations originated, not the
location of the monitor.
4.38.2 Source
User-specified via the Monitoring Objective Information (ME) Transaction, or the Maintain
Monitor form.
4.38.3 Attributes
Type: Character
Length: 5
Required: No
4.38.4 Uses
Monitor Objectives
4.38.5 Value Assignment
Must have a value if none of CMSA Represented, CSA Represented, MSA Represented, or
Urban Area Represented are valued. Conversely, must not have a value if any of CMSA
Represented, CSA Represented, MSA Represented, or Urban Area Represented are valued. If
valued, that value must exist on the CORE BASED STATISTICAL AREAS view.
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4.39 Census Block
4.39.1 Description
The U.S. Census Bureau block within which the site is located.
4.39.2 Source
Derived from the EPA master geospatial database (Envirofacts) by using the user-specified site
location (Latitude and Longitude). Note: This derivation from Envirofacts was implemented on
August 11, 2007. For sites created prior to this date, or with locations not updated since, the
field was entered by the user on either the Batch AA transaction or the Maintain Site form.
4.39.3 Attributes
Type: Character
Length: 4
Required: No
4.39.4 Uses
Sites
4.39.5 Value Assignment
If a value is provided by the user, it will be compared to the value derived from the
Envirofacts database, and a warning will be generated if they differ. (The value derived from
the Envirofacts database will be stored for the site.)
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4.40 Census Block Group
4.40.1 Description
This is the first digit of the Census Block. It is not stored in the database..
4.40.2 Source
User-specified via the Basic Site Information (AA) Transaction, or The Maintain Site form..
4.40.3 Attributes
Type: Character
Length: 1
Required: No
4.40.4 Uses
Sites
4.40.5 Value Assignment
First digit of the Census Block.
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4.41 Census Tract
4.41.1 Description
The U.S. Census Bureau census tract/block numbering area within which the site is located.
4.41.2 Source
Derived from the EPA master geospatial database (Envirofacts) by using the user-specified
site location (Latitude and Longitude). Note: This derivation from Envirofacts was
implemented on August 11, 2007. For sites created prior to this date, or with locations not
updated since, the field was entered by the user on either the Batch AA transaction or the
Maintain Site form.
4.41.3 Attributes
Type: Character
Length: 6
Required: No
4.41.4 Uses
Sites
4.41.5 Value Assignment
If a value is provided by the user, it will be compared to the value derived from the
Envirofacts database, and a warning will be generated if they differ. (The value derived from
the Envirofacts database will be stored for the site.)
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4.42 Certification Indicator
4.42.1 Description
An indication that the accuracy of the information on the annual summary record has been
certified by the owner.
4.42.2 Source
User-specified via the Certification (J) form.
4.42.3 Attributes
Type: Character
Length: 3
Required: No
4.42.4 Uses
Annual Summaries
4.42.5 Value Assignment
The only valid value is "Y".
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4.43 City Code
4.43.1 Description
The city within whose legal boundaries the monitoring site is located.
4.43.2 Source
Derived from the EPA master geospatial database (Envirofacts) by using the user-specified site
location (Latitude and Longitude). Note: This derivation from Envirofacts was implemented on
August 11, 2007. For sites created prior to this date, or with locations not updated since, the
field was entered by the user on either the Batch AA transaction or the Maintain Site form.
4.43.3 Attributes
Type: Character
Length: 5
Required: No
4.43.4 Uses
Sites
4.43.5 Value Assignment
If a value is provided by the user, it will be compared to the value derived from the Envirofacts
database, and a warning will be generated if they differ. (The value derived from the Envirofacts
database will be stored for the site.)
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4.44 Class I Area
4.44.1 Description
The Class One Area within which the site is located. A Class One Area is a geographic area
recognized by EPA as being of the highest environmental quality and requiring maximum
protection.
4.44.2 Source
User-specified via the Basic Site Information (AA) Transaction, or The Maintain Site form..
4.44.3 Attributes
Type: Character
Length: 8
Required: No
4.44.4 Uses
Sites
4.44.5 Value Assignment
Must be a value on the Class One Areas view.
4.45 Close Date
4.45.1 Description
The Close Date is a field that may be supplied by a user to "close" a monitor by setting the
end date of all of the subordinates of a monitor (e.g. Sample Periods, Monitor Type
Assignments, Agency Role Assignments, and etc).
4.45.2 Source
User-specified via the Monitor Basis (MA) Transaction, or the Maintain Monitor form.
4.45.3 Attributes
Type: Date
Length: 8
Required: No
4.45.4 Uses
Monitors (updates only)
4.45.5 Value Assignment
Must be in the format YYYYMMDD, and must be greater than all sample period begin dates for
the Monitor and any Raw, Precision, and Accuracy data.
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4.46 CMSA Represented
4.46.1 Description
The Consolidated Metropolitan Statistical Area (CMSA) from which the concentrations
originated, not the location of the monitor.
4.46.2 Source
User-specified via the Monitoring Objective Information (ME) Transaction, or the Maintain
Monitor form.
4.46.3 Attributes
Type: Character
Length: 8
Required: No
4.46.4 Uses
Monitor Objectives
4.46.5 Value Assignment
Must have a value if none of CBSA Represented, CSA Represented, MSA Represented, or
Urban Area Represented are valued. Conversely, must not have a value if any of CBSA
Represented, CSA Represented, MSA Represented, or Urban Area Represented are valued. If
valued, that value must exist on the CMSAs view.
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4.47 Collection Date
4.47.1 Description
The date for which sample data is summarized.
4.47.2 Source
System-generated as part of the Post process.
4.47.3 Attributes
Type: Date
Length: Not Applicable
Required: Yes
4.47.4 Uses
Daily Summaries
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4.48 Collection Frequency Code
4.48.1 Description
The frequency, according to which sample observations are to be made, specified as the
amount of time that elapses between observations. Indicates how often 24-hour samples are
taken, e.g., daily, every third day, stratified random, etc.
4.48.2 Source
User-specified via the Monitor Protocol (MK) or Raw Data (RD) Transaction, or the Maintain
Monitor form.
4.48.3 Attributes
Type: Character
Length: 8
Required: No
4.48.4 Uses
Monitor Protocols
4.48.5 Value Assignment
The value must be on the Collection Frequencies view, and, in conjunction with Duration
Code, Parameter, Method Code, Unit, and Composite Type, on the Protocols view.
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4.49 Collocated POC
4.49.1 Description
The Parameter Occurrence Code (POC) of the duplicate sampler. Only applies to collocated
data where the duplicate value is a recorded daily raw data point.
4.49.2 Source
User-specified via the Precision Data (RP) Transaction, or AQS Maintain Precision Data
(L61).
4.49.3 Attributes
Type: Number
Length: 2
Required: No
4.49.4 Uses
Precision Data
4.49.5 Value Assignment
In conjunction with State Code, County Code, Site ID, and Parameter, the value must exist on
the Monitors view.
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4.50 Collocation Begin Date
4.50.1 Description
The beginning date of the time period during which a collocated monitor pair recorded
precision and accuracy data. Used to determine data completeness.
4.50.2 Source
User-specified via the Monitor Protocol (MJ) Transaction, or the Maintain Monitor form.
4.50.3 Attributes
Type: Date
Length: Not Applicable
Required: Yes
4.50.4 Uses
Monitor Collocation Periods
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4.51 Collocation End Date
4.51.1 Description
The ending date of the time period during which a collocated monitor pair recorded precision
and accuracy data. Used to determine data completeness.
4.51.2 Source
User-specified via the Monitor Protocol (MJ) Transaction, or the Maintain Monitor form.
4.51.3 Attributes
Type: Date
Length: Not Applicable
Required: Yes
4.51.4 Uses
Monitor Collocation Periods
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4.52 Comment Text
4.52.1 Description
A free-form narrative to be used in anyway the user desires, but generally to explain or further
describe the related item, i.e., site, monitor, or sample.
4.52.2 Source
User-specified, via Maintain Site (LI), Maintain Monitor (L2), Maintain Raw Data (L54), or
Maintain Composite Data (L51).
4.52.3 Attributes
Type: Character
Length: 255
Required: Yes
4.52.4 Uses
Comments
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4.53 Community Monitoring Zone
4.53.1 Description
A sequential number assigned to an optional averaging area with an established, defined
boundary within a monitor planning area that has relatively uniform concentration of annual
PM-2.5. Community monitoring zones do not cross geographical lines.
4.53.2 Source
User-specified via the Basic Monitor Information (MA) Transaction, or the Maintain Monitor
form.
4.53.3 Attributes
Type: Number
Length: 4.0
Required: No
4.53.4 Uses
Monitor Pollutant Areas
4.53.5 Value Assignment
4.53.5.1 Monitor Planning Areas
May be assigned a value when the Pollutant Area Type value is not Monitor Planning Area.
4.53.5.2 Default
May not be assigned a value when the Pollutant Area Type value is not Monitor Planning
Area.
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4.54 Compliance Date
4.54.1 Description
The date on which the current status of the monitor=s compliance with the regulation was
achieved.
4.54.2 Source
User-specified via the Monitor Regulatory Compliance (MI) Transaction, or the Maintain
Monitor form.
4.54.3 Attributes
Type: Date
Length: Not Applicable
Required: No
4.54.4 Uses
Monitor Regulatory Compliances
4.54.5 Assignment
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4.55 Compliance Indicator
4.55.1 Description
The compliance status of a monitor with respect to an EPA regulation.
4.55.2 Source
User-specified via the Monitor Regulatory Compliance (MI) Transaction, or the Maintain
Monitor form.
4.55.3 Attributes
Type: Character
Length: 3
Required: Yes
4.55.4 Uses
Monitor Regulatory Compliances
4.55.5 Value Assignment
Regulation
Code
Valid Values
ST
Y, N
RM
Y, N
FC
Y, N
QA
Y, N, C
SC
Y, N, W
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4.56 Composite Period
4.56.1 Description
Indicates the time period within the year to which the observation applies. It is expressed in
units that may be inferred from the Composite Type.
4.56.2 Source
User-specified via the Composite Data (RC) Transaction, or AQS Maintain Composite Data
(L51).
4.56.3 Attributes
Type: Number
Length: 2.0
Required: Yes
4.56.4 Uses
Composite Data
Composite Qualifier Details
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4.57 Composite Type
4.57.1 Description
The time period over which samples are composited, or the frequency of submitting
composite samples.
4.57.2 Source
User-specified via the Monitor Protocol (MK) or Composite Data (RC) Transactions, or the
Maintain Monitor form.
4.57.3 Attributes
Type: Character
Length: 10
Required: No
4.57.4 Uses
Composite Type
4.57.5 Value Assignment
The value must be on the Composite Types view, and, in conjunction with Duration Code,
Parameter, Method Code, Unit, and Collection Frequency Code, on the Protocols view.
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4.58 Composite Year
4.58.1 Description
The calendar year for which the observation was reported.
4.58.2 Source
User-specified via the Composite Data (RC) Transaction, or AQS Maintain Composite Data
(L51).
4.58.3 Attributes
Type: Number
Length: 4.0
Required: Yes
4.58.4 Uses
Composite Data
Composite Qualifier Details
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4.59 Congressional District
4.59.1 Description
The Congressional district within which the site is located.
4.59.2 Source
Derived from the EPA master geospatial database (Envirofacts) by using the user-specified
site location (Latitude and Longitude). Note: This derivation from Envirofacts was
implemented on August 11, 2007. For sites created prior to this date, or with locations not
updated since, the field was entered by the user on either the Batch AA transaction or the
Maintain Site form.
4.59.3 Attributes
Type: Number
Length: 12.0
Required: No
4.59.4 Uses
Sites
4.59.5 Value Assignment
If a value is provided by the user, it will be compared to the value derived from the Envirofacts
database, and a warning will be generated if they differ. (The value derived from the Envirofacts
database will be stored for the site.)
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4.60 Count of Accuracy Audits (Monitor Accuracy Summary)
4.60.1 Description
The number of accuracy audits recorded during the time period for the monitor.
4.60.2 Source
System-generated via Accuracy Data (RA) Transaction, or Maintain Accuracy (L61).
4.60.3 Attributes
Type: Number
Length: 12.0
Required: Yes
4.60.4 Uses
Monitor Accuracy Summaries
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4.61 Count of Accuracy Audits (Reporting Organization Accuracy
Summary)
4.61.1 Description
The number of accuracy audits recorded during the time period.
4.61.2 Source
System-generated via Accuracy Data (RA) Transaction, or Maintain Accuracy (L61).
4.61.3 Attributes
Type: Number
Length: 12.0
Required: Yes
4.61.4 Uses
Reporting Organization Accuracy Summaries
4.61.5 Value Assignment
If either quarter in either half of the year has an Audit Count of 1, then the audits for both
quarters will be counted and reported with the second quarter for the half (Q2 or Q4).
However, for the first quarter in the half (Q1 or Q3), the audits will still be counted and
reported with that quarter.
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4.62 Count of Analyzers
4.62.1 Description
The average number of approved analyzers in the network.
4.62.2 Source
System-generated via Precision Data (RP) Transaction, or Maintain Precision (L62).
4.62.3 Attributes
Type: Number
Length: 12.0
Required: Yes
4.62.4 Uses
Reporting Organization Precision Summaries
4.62.5 Value Assignment
4.62.5.1 Gaseous or Flow
The number of monitors for which checks were recorded during the time period.
4.62.5.2 Collocated
The number of collocated sampler pairs that recorded collocated value pairs during the time
period, (i.e., the Count of Collocated Sites).
4.62.5.3 Federal Reference Method (FRM) audits
Assigned a default value of 0.
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4.63 Count of Collocated Sites
4.63.1 Description
The average number of sites having collocated samplers.
4.63.2 Source
System-generated via Precision Data (RP) Transaction, or Maintain Precision (L62).
4.63.3 Attributes
Type: Number
Length: 12.0
Required: Yes
4.63.4 Uses
Reporting Organization Precision Summaries
4.63.5 Value Assignment
4.63.5.1 Collocated
The number of collocated sampler pairs that recorded collocated value pairs during the time
period.
4.63.5.2 Gaseous, Flow, or Federal Reference Method (FRM) Audits
Assigned a default value of 0
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4.64 Count of Creditable Samples
4.64.1 Description
The number of scheduled days plus make-up days for missing scheduled days.
4.64.2 Source
System-generated via the Post process.
4.64.3 Attributes
Type: Number
Length: 3.0
Required: No
4.64.4 Uses
Site Annual Summaries
Site Quarterly Summaries
4.64.5 Value Assignment
4.64.5.1 PM2.5
The sum of valued, scheduled sampling days, plus make-ups for missing scheduled days.
Scheduled days are the number of days within the year that were scheduled for sampling, as
determined by the EPA-defined calendar for the required collection frequency, and which also
fall within the period of operation, as defined by sampling periods.
A make-up day is a sample recorded in the same stratum as, or exactly seven days after, a
missing scheduled sample. In both conditions, the make-up sample must occur within the
same quarter as the missed sample. A maximum of five make-up samples are allowed per
quarter. (References: EPA-454/R-99-008 Guideline on Data Handling Conventions for the
PM NAAQS; Memorandum: February 3, 1999 Use of Make-Up Samples to Replace
Scheduled PM Samples)
4.64.5.2 Default
Not valued
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4.65 Count of Exceptional Events
4.65.1 Description
The number of data points in the annual data set affected by events.
4.65.2 Source
System-generated via the Post process, or user-generated via either the Annual Summaries
(RS) Transaction or Maintain Annual Summaries (L7).
4.65.3 Attributes
Type: Number
Length: 10.0
Required: Yes
4.65.4 Uses
Annual Summaries
4.65.5 Value Assignment
4.65.5.1 Observed Durations
A count of the Raw Data or Composite Data records for the monitor and year whose Primary
Qualifier Type value is either "EX", (for exceptional event qualifiers), or "NAT", (for natural
event qualifiers).
4.65.5.2 National Ambient Air Quality Standards (NAAQS) Durations
Not valued.
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4.66 Count of Days Greater Than Alert Level
4.66.1 Description
The number of days within the year where the monitor had sample values that exceeded the
alert level for the pollutant.
4.66.2 Source
System-generated via the Post Process.
4.66.3 Attributes
Type: Number
Length: 3.0
Required: No
4.66.4 Uses
Annual Summaries
4.66.5 Value Assignment
Comparisons to alert levels are based on sample values converted to the pollutant's standard
unit.
4.66.5.1 1-Hour Ozone
The number of days where the hourly Maximum Value (Daily) is greater than 0.2 parts per
million (ppm).
4.66.5.2 8-Hour Carbon Monoxide
The number of days where the 8-Hour Maximum Value (Daily) is greater than 15 ppm.
4.66.5.3 Daily & 24-Hour Sulfur Dioxide
The number of days where daily sample value or 24-hour block average is greater than 0.3
ppm.
4.66.5.4 Annual Nitrogen Dioxide
If the Arithmetic Mean (Annual) exceeds 0.6 ppm, then 1; otherwise, 0.
4.66.5.5 Daily & 24 Hour PM10
The number of days where either the daily sample value or 24-hour block average is greater
than 350 micrograms per cubic meter - standard conditions ((J-g/m3 SC).
4.66.5.6 Default
Not valued.
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4.67 Count of Half-MDL Substitutions
4.67.1 Description
The number of samples in the calendar year whose calculated standard value was less than the
applicable method detectable limit (MDL), and for which V2 of that MDL was substituted for
the calculated standard value.
4.67.2 Source
System-generated as part of the Post process.
4.67.3 Attributes
Type: Number
Length: 10.0
Required: No
4.67.4 Uses
Annual Summaries
4.67.5 Value Assignment
4.67.5.1 Hourly PM2.5
Not valued.
4.67.5.2 National Ambient Air Quality Standards (NAAQS) Durations
Not valued.
4.67.5.3 Default
The count of Raw Data or Composite Data records for the year that are flagged as having had
half the MDL substituted {HalfMDL Substitution Indicator = "Y") for the calculated
Standard Sample Value, where the latter value is less than the MDL.
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4.68 Count of Methods
4.68.1 Description
The number of methods used to collect samples for the monitor during the year.
4.68.2 Source
System-generated via the Post process.
4.68.3 Attributes
Type: Number
Length: 12.0
Required: No
4.68.4 Uses
Annual Summaries
4.68.5 Value Assignment
4.68.5.1 Observed Durations
Always valued.
4.68.5.2 National Ambient Air Quality Standards (NAAQS) Durations
Never valued.
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4.69 Count of Missing Days Assumed Less Than Standard
4.69.1 Description
The number of invalid or missing days in the effective monitoring season whose daily
maximums are assumed to be less than or equal to the standard.
4.69.2 Source
System-generated via the Post process.
4.69.3 Attributes
Type: Number
Length: 3.0
Required: No
4.69.4 Uses
Annual Summaries
4.69.5 Value Assignment
4.69.5.1 1-Hour Ozone
A missing or invalid day is assumed to be less than the standard when either of the following
conditions exists:
The daily maximums on the days immediately preceding, and immediately succeeding,
the missing day were less than, or equal to, 75% of the standard.
The number of valid samples for the day was less than 18, and the sum of the following is
greater than, or equal, to 18, i.e., 75% of the possible values:
Number of valid samples;
Number of null samples that were both flagged as not likely to exceed the standard, and
for which the Regional Office has indicated concurrence;
Number of omitted samples that were flagged with event qualifiers, and for which the
Regional Office has indicated concurrence.
4.69.5.2 8-Hour Ozone
A missing or invalid day is assumed to be less than the standard for the following condition:
The number of valid 8-hour arithmetic averages for the day was less than 18, and the sum
of the following is greater than, or equal, to 18, i.e., 75% of the possible values:
Number of valid 8-hour arithmetic averages;
Number of missing 8-hour arithmetic averages that would be valid if excluded samples
(null or event-qualified) were included, where those excluded samples have concurrence
from the EPA Regional Office.
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4.69.5.3 Default
Not valued.
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4.70 Count of Non-Overlapping Exceedances (Annual)
4.70.1 Description
The number of primary exceedances with 8 or more hours between any other exceedances.
4.70.2 Source
System-generated via the Post process.
4.70.3 Attributes
Type: Number
Length: 10.0
Required: No
4.70.4 Uses
Annual Summaries
4.70.5 Value Assignment
4.70.5.1 8-Hour Carbon Monoxide
Always valued with an integer of 0 or greater.
4.70.5.2 Default
Not valued.
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4.71 Count of Non-Overlapping Exceedances (Daily)
4.71.1 Description
The number of primary exceedances with 8 or more hours between any other exceedances.
4.71.2 Source
System-generated via the Post process.
4.71.3 Attributes
Type: Number
Length: 10.0
Required: No
4.71.4 Uses
Daily Summaries
4.71.5 Value Assignment
4.71.5.1 8-Hour Carbon Monoxide
Always valued with an integer of 0 or greater.
4.71.5.2 Default
Not valued.
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4.72 Count of Null Data Values
4.72.1 Description
The number of null samples that occurred within the calendar year
4.72.2 Source
System-generated during the Post process.
4.72.3 Attributes
Type: Number
Length: 10.0
Required: No
4.72.4 Uses
Annual Summaries
4.72.5 Value Assignment
4.72.5.1 Composite Data
Not valued.
4.72.5.2 National Ambient Air Quality Standards (NAAQS) Durations
Not valued.
4.72.5.3 Default
The count of Raw Data records where the Primary Qualifier Type is "NULL".
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4.73 Count of Observations (Annual)
4.73.1 Description
The number of raw data values that are the basis for the summary values.
4.73.2 Source
System-generated via the Post process, or user-generated via either the Annual Summaries
(RS) Transaction or Maintain Annual Summaries (L7).
4.73.3 Attributes
Type: Number
Length: 10.0
Required: No
4.73.4 Uses
Annual Summaries
4.73.5 Value
4.73.5.1 PM 2.5
Count of total number of days in the year with daily summaries (not just scheduled days)
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4.74 Count of Observations (Daily)
4.74.1 Description
The number of raw data values that are the basis for the summary values.
4.74.2 Source
System-generated via the Post process.
4.74.3 Attributes
Type: Number
Length: 10.0
Required: No
4.74.4 Uses
Daily Summaries
4.74.5 Value
4.74.5.1 PM2.5
Daily observation count = 1
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4.75 Count of Observations (Quarterly)
4.75.1 Description
The number of raw data values that are the basis for the summary values.
4.75.2 Source
System-generated via the Post process.
4.75.3 Attributes
Type: Number
Length: 10.0
Required: No
4.75.4 Uses
Quarterly Summaries
Site Quarterly Summaries
4.75.5 Value
4.75.5.1 PM 2.5
Count of total number of days in quarter with daily summaries (not just scheduled days)
4.75.5.2 Site-Level PM2.5
Count of total number of days in quarter with site daily values (not just scheduled days)
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4.76 Count of Precision Checks (Monitor Precision Summary)
4.76.1 Description
The number of precision checks, (gaseous, flow, collocated, Federal Reference Method, i.e.,
FRM) recorded during the time period.
4.76.2 Source
System-generated via Precision Data (RP) Transaction, or Maintain Precision (L62).
4.76.3 Attributes
Type: Number
Length: 3.0
Required: No
4.76.4 Uses
Monitor Precision Summaries
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4.77 Count of Precision Checks (Reporting Organization Precision
Summary)
4.77.1 Description
The number of precision checks, (gaseous, flow, collocated, Federal Reference Method, i.e.,
FRM) recorded during the time period.
4.77.2 Source
System-generated via Precision Data (RP) Transaction, or Maintain Precision (L62).
4.77.3 Attributes
Type: Number
Length: 12.0
Required: No
4.77.4 Uses
Reporting Organization Precision Summaries
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4.78 Count of Primary Exceedances (Annual)
4.78.1 Description
The number of exceedances of the primary standard during the year for the monitor.
4.78.2 Source
System-generated via the Post process.
4.78.3 Attributes
Type: Number
Length: 10.0
Required: No
4.78.4 Uses
Annual Summaries
4.78.5 Value Assignment
4.78.5.1 1-Hour Ozone
The number of days in the effective monitoring season when the Maximum Value (Daily) was
greater than, or equal to, 0.125 parts per million (ppm).
4.78.5.2 8-Hour Ozone
The number of days in the effective monitoring season where the Maximum Value (Daily)
was greater than, or equal to, 0.085 ppm.
4.78.5.3 1-Hour Carbon Monoxide
The number of samples in the year that were greater than, or equal to, 35.5 ppm.
4.78.5.4 8-Hour Carbon Monoxide
The number of 8-hour Arithmetic Mean (NAAQS) values in the year that were greater than, or
equal to, 9.5 ppm.
4.78.5.5 Daily & 24-Hour Sulfur Dioxide
The number of daily samples, or 24-hour block Arithmetic Mean (NAAQS) values, in the year
that were greater than, or equal to, 0.145 ppm.
4.78.5.6 Daily & 24-Hour PM10
The number of daily samples, or 24-hour block Arithmetic Mean (NAAQS) values, in the year
that were greater than, or equal to, 155 micrograms per cubic meter - standard conditions
(Hg/m3 SC).
4.78.5.7 Daily & 24-Hour PM2.5
The number of daily samples, or 24-hour block Arithmetic Mean (NAAQS) values, in the year
that were greater than, or equal to, 65 micrograms per cubic meter - local conditions ((J-g/m3
LC).
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4.78.5.8 Nitrogen Dioxide
If the Arithmetic Mean (Annual) is greater than, or equal to, 0.053 ppm, then 1; otherwise, 0.
4.78.5.9 Lead
The number of Arithmetic Mean (Quarterly) values, that are greater than, or equal to, 1.55
Hg/m3 SC.
4.78.5.10 Default
Not valued
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4.79 Count of Primary Exceedances (Daily)
4.79.1 Description
The number of exceedances of the primary standard during the 24-hour period for the
monitor.
4.79.2 Source
System-generated via the Post process.
4.79.3 Attributes
Type: Number
Length: 10.0
Required: No
4.79.4 Uses
Daily Summaries
4.79.5 Value Assignment
4.79.5.1 1-Hour Ozone
The number of samples within the 24-hour period that were greater than, or equal to, 0.125
parts per million (ppm).
4.79.5.2 8-Hour Ozone
The number of 8-hour Arithmetic Mean (NAAQS) values, in the 24-hour period that were
greater than, or equal to, 0.085 ppm.
4.79.5.3 1-Hour Carbon Monoxide
The number of samples in the 24-hour period that were greater than, or equal to, 35.5 ppm.
4.79.5.4 8-Hour Carbon Monoxide
The number of 8-hour Arithmetic Mean (NAAQS) values, in the 24-hour period that were
greater than, or equal to, 9.5 ppm.
4.79.5.5 Daily & 24-Hour Sulfur Dioxide
The number of samples, or 24-hour block Arithmetic Mean (NAAQS) values, in the 24-hour
period that were greater than, or equal to, 0.145 ppm, i.e., 0 or 1.
4.79.5.6 Daily & 24-Hour PM10
The number of daily samples, or 24-hour block Arithmetic Mean (NAAQS) values, in the 24-
hour period that were greater than, or equal to, 155 micrograms per cubic meter - standard
conditions ((J-g/m3 SC), i.e., 0 or 1.
4.79.5.7 Daily & 24-Hour PM2.5
The number of daily samples, or 24-hour block Arithmetic Mean (NAAQS) values, in the 24-
hour period that were greater than, or equal to, 65 micrograms per cubic meter - local
"3
conditions ((J,g/m LC), i.e., 0 or 1.
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4.79.5.8 Default
Not valued
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4.80 Count of Required Days
4.80.1 Description
The number of required monitoring days during the year.
4.80.2 Source
System-generated via the Post process.
4.80.3 Attributes
Type: Number
Length: 3.0
Required: No
4.80.4 Uses
Annual Summaries
4.80.5 Value Assignment
4.80.5.1 1-Hour & 8-Hour Ozone
The number of active days within the effective monitoring season.
4.80.5.2 Daily PM10&PM2.5
Scheduled days are the number of days within the year that were scheduled for sampling, as
determined by the EPA-defined calendar for the required collection frequency, and which also
fall within the period of operation, as defined by sampling periods.
Seasonal and random frequencies are sub-divided in monthly-required frequencies; otherwise,
the required frequency applies to a defined period of time. A PM10 or PM2.5 monitor must
have a defined collection frequency for each active day, by rule.
The reference point for the EPA calendar is January 4, 1956. For example, in the year 2003,
the every 6th day calendar would comprise: 1/3/2003, 1/9/2003, 1/15/2003, etc., and the every
3rd day calendar would comprise: 1/3/2003, 1/6/2003, 1/9/2003, 1/12/2003, etc. For a monitor
doing seasonal sampling, with every 6th day sampling in April and every 3rd day sampling in
May, both months in 2003, the schedule would be as follows: 4/15/03, 4/21/03, 4/27/03,
5/3/03, 5/6/03, 5/9/03, etc.
4.80.5.3 24-Hour PM10&PM2.5
The number of active days in the year.
4.80.5.4 Default
Not valued.
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4.81 Count of Secondary Exceedances (Annual)
4.81.1 Description
The number of exceedances of the secondary standard during the year for the monitor.
4.81.2 Source
System-generated via the Post process.
4.81.3 Attributes
Type: Number
Length: 10.0
Required: No
4.81.4 Uses
Annual Summaries
4.81.5 Value Assignment
4.81.5.1 1-Hour Ozone
The number of days in the effective monitoring season when the Maximum Value (Daily) was
greater than, or equal to, 0.125 parts per million (ppm).
4.81.5.2 8-Hour Ozone
The number of days in the effective monitoring season where the Maximum Value (Daily)
was greater than, or equal to, 0.085 ppm.
4.81.5.3 1-Hour Carbon Monoxide
The number of samples in the year that were greater than, or equal to, 35.5 ppm.
4.81.5.4 8-Hour Carbon Monoxide
The number of 8-hour Arithmetic Mean (NAAQS) values in the year that were greater than, or
equal to, 9.5 ppm.
4.81.5.5 3-Hour Sulfur Dioxide
The number of 3-hour Arithmetic Mean (NAAQS) values in the year that were greater than, or
equal to, 0.55 ppm.
4.81.5.6 Daily & 24-Hour PM10
The number of daily samples, or 24-hour block Arithmetic Mean (NAAQS) values, in the year
that were greater than, or equal to, 155 micrograms per cubic meter - standard conditions
(Hg/m3 SC).
4.81.5.7 Daily & 24-Hour PM2.5
The number of daily samples, or 24-hour block Arithmetic Mean (NAAQS) values, in the year
that were greater than, or equal to, 65 micrograms per cubic meter - local conditions ((J-g/m3
LC).
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4.81.5.8 Nitrogen Dioxide
If the Arithmetic Mean (Annual) is greater than, or equal to, the secondary standard of 0.053
ppm, then 1; otherwise, 0.
4.81.5.9 Lead
The number of Arithmetic Mean (Quarterly) values that were greater than, or equal to, 1.55
Hg/m3 SC.
4.81.5.10 Default
Not valued.
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4.82 Count of Secondary Exceedances (Daily)
4.82.1 Description
The number of exceedances of the secondary standard during the 24-hour period for the
monitor.
4.82.2 Source
System-generated via the Post process.
4.82.3 Attributes
Type: Number
Length: 10.0
Required: No
4.82.4 Uses
Daily Summaries
4.82.5 Value Assignment
4.82.5.1 1-Hour Ozone
The number of samples within the 24-hour period that were greater than, or equal to, 0.125
parts per million (ppm).
4.82.5.2 8-Hour Ozone
The number of 8-hour Arithmetic Mean (NAAQS) values in the 24-hour period that were
greater than, or equal to, 0.085 ppm.
4.82.5.3 1-Hour Carbon Monoxide
The number of samples in the 24-hour period that were greater than, or equal to, 35.5 ppm.
4.82.5.4 8-Hour Carbon Monoxide
The number of 8-hour Arithmetic Mean (NAAQS) values in the 24-hour period that were
greater than, or equal to, 9.5 ppm.
4.82.5.5 3-Hour Sulfur Dioxide
The number of 3-hour Arithmetic Mean (NAAQS) values in the 24-hour period that were
greater than, or equal to, 0.55 ppm.
4.82.5.6 Daily & 24-Hour PM10
The number of daily samples, or 24-hour block Arithmetic Mean (NAAQS) values, in the 24-
hour period that were greater than, or equal to, 155 micrograms per cubic meter - standard
conditions ((J-g/m3 SC), i.e., 0 or 1.
4.82.5.7 Daily & 24-Hour PM2.5
The number of daily samples, or 24-hour block Arithmetic Mean (NAAQS) values, in the 24-
hour period that were greater than, or equal to, 65 (J,g/m3 LC, i.e., 0 or 1.
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4.82.5.8 Default
Not valued
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4.83 Count of Valid Collocated Data Pairs (Monitor Precision
Summary)
4.83.1 Description
The number of valid collocated value pairs recorded during the time period.
4.83.2 Source
System-generated via Precision Data (RP) Transaction, or Maintain Precision (L62).
4.83.3 Attributes
Type: Number
Length: 3.0
Required: No
4.83.4 Uses
Monitor Precision Summaries
4.83.5 Value Assignment
4.83.5.1 Collocated
A valid collocated value pair is one where both the primary and duplicate value exceeds the
minimum collocated value defined for the parameter on the Parameters view. The minimum
values for criteria pollutants are:
Parameter
Minimum
Code
Name
Value
11101
TSP
20 (j-g/nr* SC
12128
Lead
.015 (j-g/nr* SC
42401
S02
.01717 ppm
42602
N02
.01593 ppm
81102
PM10
20 (j-g/nr* SC
88101
PM2.5
6 |ig/in i LC
where:
ppm - parts per million
[j,g/m3 SC - micrograms per cubic meter (standard conditions)
[j,g/m3 LC - micrograms per cubic meter (local conditions).
If a minimum collocated value is not defined for the parameter, then the value pair is assumed
valid.
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4.83.5.2 Default
The field is not applicable to gaseous or flow checks, in which cases it is assigned a default
value of 0.
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4.84 Count of Valid Collocated Data Pairs (Reporting Organization
Precision Summary)
4.84.1 Description
The number of valid collocated value pairs recorded during the time period.
4.84.2 Source
System-generated via Precision Data (RP) Transaction, or Maintain Precision (L62).
4.84.3 Attributes
Type: Number
Length: 12.0
Required: No
4.84.4 Uses
Reporting Organization Precision Summaries
4.84.5 Value Assignment
4.84.5.1 Collocated
A valid collocated value pair is one where both the primary and duplicate value exceeds the
minimum collocated value defined for the parameter on the Parameters view. The minimum
values for criteria pollutants are:
Parameter
Minimum
Code
Name
Value
11101
TSP
20 (j-g/nr* SC
12128
Lead
.015 (j-g/nr* SC
42401
S02
.01717 ppm
42602
N02
.01593 ppm
81102
PM10
20 (j-g/nr* SC
88101
PM2.5
6 |ig/in i LC
where:
ppm - parts per million
[j,g/m3 SC - micrograms per cubic meter (standard conditions)
[j,g/m3 LC - micrograms per cubic meter (local conditions).
If a minimum collocated value is not defined for the parameter, then the value pair is assumed
valid.
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4.84.5.2 Default
The field is not applicable to gaseous or flow checks, in which cases it is assigned a default
value of 0.
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4.85 Count of Valid Days
4.85.1 Description
The number of required monitoring days where the monitoring criteria were met.
4.85.2 Source
System-generated via the Post process.
4.85.3 Attributes
Type: Number
Length: 3.0
Required: No
4.85.4 Uses
Annual Summaries
4.85.5 Value Assignment
4.85.5.1 1-Hour & 8-Hour Ozone
The number of active days within the effective monitoring season when minimum daily
criteria were met, i.e., the Summary Criteria Indicator (Daily) value is "Y".
4.85.5.2 Daily PM10
The number of valued strata in the year. (A valued stratum is where at least one observation
is made on, or after, a scheduled day, but before the next scheduled day.)
4.85.5.3 Daily PM2.5
The sum of valued, scheduled sampling days, plus make-ups for missing scheduled days. A
make-up day is a sample recorded in the same stratum as, or exactly seven days after, a
missing scheduled sample. In both conditions, the make-up sample must occur within the
same quarter as the missed sample. A maximum of five make-up samples are allowed per
quarter. (References: EPA-454/R-99-008 Guideline on Data Handling Conventions for the
PM NAAQS; Memorandum: February 3, 1999 Use of Make-Up Samples to Replace
Scheduled PM Samples)
4.85.5.4 24-Hour PM10&PM2.5
The number of valid 24-hour block Arithmetic Mean (NAAQS) values within the year.
4.85.5.5 Annual PM2.5
The sum of scheduled sampling days, plus make-ups for missing scheduled days for the year.
4.85.5.6 Site-Level Annual PM2.5
The count of scheduled days for available quarters where a site-level summary exists (of any
type) plus count of make up days. (Note: This is not affected by the existence of data
flagged for exceptional event exclusion.)
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4.85.5.7 Site-Level Quarterly PM2.5
The count of scheduled days in the quarter where a site-level summary exists (of any type)
plus count of make up days. (Note: This is not affected by the existence of data flagged for
exceptional event exclusion.)
4.85.5.8 Default
Not valued.
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4.86 County Code
4.86.1 Description
A Federal Information Processing Standards (FIPS) code that identifies a county, or other
geo-political entity, such as tribe, parish or independent city. For foreign countries, it
identifies the geo-political equivalent to U. S. states, such as Mexican states or Canadian
provinces.
4.86.2 Source
User-specified via the Basic Site Information (AA) Transaction, or The Maintain Site form..
If a user creates a tribal site via either of these two methods, then the State Code is derived
from the EPA master geospatial database (Envirofacts) by using the user-specified site
location (Latitude and Longitude).
4.86.3 Attributes
Type: Character
Length: 3
Required: Yes
4.86.4 Uses
Sites
Tangent Roads
Open Paths
Monitors
4.86.5 Value Assignment
The value must exist on the Counties view.
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4.87 Created Date
4.87.1 Description
The date when the record was created.
4.87.2 Source
System-generated via any of the AQS transactions, or any of the Maintain modules.
4.87.3 Attributes
Type: Date
Length: Not applicable
Required: No
4.87.4 Uses
Sites
Tangent Roads
Open Paths
Primary Monitor Periods
Monitors
Monitor Pollutant Areas
Sample Periods
Monitor Type Assignments
Monitor Agency Roles
Monitor Objectives
Required Collection Frequencies
Sample Schedules
Monitor Tangent Roads
Probe Obstructions
Monitor Regulatory Compliances
Monitor Collocation Periods
Monitor Protocols
Accuracy Data
Precision Data
Site Daily Values
Site Annual Summaries
Site Quarterly Summaries
Site Design Values
Summary Percentiles
Summary Maximums
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4.88 Created User
4.88.1 Description
The Oracle user ID of the user who created the record.
4.88.2 Source
System-generated via any of the AQS transactions, or any of the Maintain modules.
4.88.3 Attributes
Type: Character
Length: 40
Required: No
4.88.4 Uses
Sites
Tangent Roads
Open Paths
Primary Monitor Periods
Monitors
Monitor Pollutant Areas
Sample Periods
Monitor Type Assignments
Monitor Agency Roles
Monitor Objectives
Required Collection Frequencies
Sample Schedules
Monitor Tangent Roads
Probe Obstructions
Monitor Regulatory Compliances
Monitor Collocation Periods
Monitor Protocols
Accuracy Data
Precision Data
Annual Summaries
Site Daily Values
Site Annual Summaries
Site Quarterly Summaries
Site Design Values
Summary Percentiles
Summary Maximums
4.88.5 Value Assignment
The value must exist on the AIRS User Profiles view.
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4.89 CSA Represented
4.89.1 Description
The Combined Statistical Area (CSA) from which the concentrations originated, not the
location of the monitor.
4.89.2 Source
User-specified via the Monitoring Objective Information (ME) Transaction, or the Maintain
Monitor form.
4.89.3 Attributes
Type: Character
Length: 3
Required: No
4.89.4 Uses
Monitor Objectives
4.89.5 Value Assignment
Must have a value if none of CBSA Represented, CMSA Represented, MSA Represented, or
Urban Area Represented are valued. Conversely, must not have a value if any of CBSA
Represented, CMSA Represented, MSA Represented, or Urban Area Represented are valued.
If valued, that value must exist on the COMBINED STATISTICAL AREA view.
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4.90 Daily Rank
4.90.1 Description
The rank of the Maximum Value relative to all other maximum values for the year, with 1
signifying the maximum value for the entire year.
4.90.2 Source
System-generated via the Post process.
4.90.3 Attributes
Type: Number
Length: 3.0
Required: No
4.90.4 Uses
Daily Summaries
4.90.5 Value Assignment
Only computed for Exceptional Data Type values 0 and 2.
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4.91 Daily Value
4.91.1 Description
The combined daily value for a site.
4.91.2 Source
System-generated via the Post process or when updating Primary Monitor Periods from the
application.
4.91.3 Attributes
Type: Number
Required: No
4.91.4 Uses
Site Daily Values
4.91.5 Value Assignment
Only computed for combinable parameters.
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4.92 Date Sampling Began
4.92.1 Description
The date, on which a distinct period of operations, i.e., collection of air quality samples, began
for the monitor.
4.92.2 Source
User-specified via the Monitor Sampling Periods (MB) Transaction, or the Maintain Monitor
form.
4.92.3 Attributes
Type: Date
Length: Not Applicable
Required: Yes
4.92.4 Uses
Sample Periods
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4.93 Date Sampling Ended
4.93.1 Description
The date, on which a distinct period of operations, i.e., collection of air quality samples,
stopped for the monitor.
4.93.2 Source
User-specified via the Monitor Sampling Periods (MB) Transaction, or the Maintain Monitor
form.
4.93.3 Attributes
Type: Date
Length: Not Applicable
Required: No
4.93.4 Uses
Sample Periods
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4.94 Date Site Established
4.94.1 Description
The date on which an air-monitoring site began collecting air quality data.
4.94.2 Source
User-specified via the Basic Site Information (AA) Transaction, or The Maintain Site form..
4.94.3 Attributes
Type: Date
Length: Not Applicable
Required: Yes
4.94.4 Uses
Sites
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4.95 Date Site Terminated
4.95.1 Description
The date on which a monitoring site ceased to operate.
4.95.2 Source
User-specified via the Basic Site Information (AA) Transaction, or The Maintain Site form..
4.95.3 Attributes
Type: Date
Length: Not Applicable
Required: No
4.95.4 Uses
Sites
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4.96 Design Validity Indicator (24 Hr)
4.96.1 Description
Flag indicating whether the 24-hour Standard Design Value is valid.
4.96.2 Source
System generated during Post process
4.96.3 Attributes
Type: Varchar2
Length: 1
Required: No
4.96.4 Uses
Site Design Values
4.96.5 Value Assignment
4.96.5.1 Site-Level PM2.5
The valid values are "Y" and "N". Set to valid (i.e., 'Y') if any of the following is true:
The Annual 98th Percentile Completeness Indicator for the current year and the two
immediately prior years exists and is set to "valid" (i.e. ' Y').
The 24-hour Standard Design Value > the standard (35)
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4.97 Design Validity Indicator (Annual)
4.97.1 Description
Flag indicating whether the Single Site Annual Design Value is valid.
4.97.2 Source
System generated during Post process
4.97.3 Attributes
Type: Varchar2
Length: 1
Required: No
4.97.4 Uses
Site Design Values
4.97.5 Value Assignment
4.97.5.1 Site-Level PM2.5
The valid values are "Y" and "N". Set to valid (i.e., 'Y') if any of the following is true:
The present year and the two prior year Annual Mean Completeness Indicators are set to
complete (i.e. 'Y').
The Single Site Annual Standard Design Value is above the standard (15).
The Substituted Annual Design Value exists and is above the standard (15).
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4.98 Design Value (24Hr)
4.98.1 Description
The measure of a central tendency, computed if and only if the annual 98th Percentile Values
exist for the current year and the two immediately prior years, obtained from the sum of
Annual 98th percentile values (of appropriate exceptional data type) for current year and prior
two years divided by 3.
4.98.2 Source
System generated during Post process
4.98.3 Attributes
Type: Number
Required: No
4.98.4 Uses
Site Design Values
4.98.5 Value Assignment
4.98.5.1 Site-Level PM2.5
tu-A
/=l
where:
u; = Annual Summary Arithmetic Mean (of appropriate exceptional data type) for current
year and prior two years
(Format: Rounded to zero digits after decimal point)
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4.99 Design Value (Annual)
4.99.1 Description
The measure of a central tendency, computed if and only if the site-level annual summary
Arithmetic Mean exists for the current year and two immediately prior years, obtained from
the sum of Annual Summary Arithmetic Mean (of appropriate exceptional data type) for
current year and prior two years divided by 3.
4.99.2 Source
System generated during Post process
4.99.3 Attributes
Type: Number
Required: No
4.99.4 Uses
Site Design Values
4.99.5 Value Assignment
4.99.5.1 Site-Level PM2.5
where:
u; = Annual Summary Arithmetic Mean (of appropriate exceptional data type) for current
year and prior two years
(Format: Rounded to one digit after decimal point)
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4.100 Direct Entry Indicator
4.100.1 Description
An indication of whether the summary record was system-generated as part of the Post
process, or user-specified via the Annual Summary Data (RS) Transaction, or AQS Maintain
Annual Summary (L7).
4.100.2 Source
System-generated via the Post or Load processes, or AQS Maintain Annual Summary (L7).
4.100.3 Attributes
Type: Character
Length: 3
Required: No
4.100.4 Uses
Annual Summaries
4.100.5 Value Assignment
"N" signifies the record was system-generated via the Post process; "Y" signifies the record
was user-specified via either the Annual Summary Data (RS) Transaction, or AQS Maintain
Annual Summary (L7).
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4.101 Direction from Central Business District to Site
4.101.1 Description
A representation of the true, as opposed to magnetic, direction of the site from the central
business district. If the site is within the central business district, it is a representation of the
direction the probe faces.
4.101.2 Source
User-specified, via Sites (AA) Transaction, or The Maintain Site form..
4.101.3 Attributes
Type: Character
Length: 3
Required: No
4.101.4 Uses
Sites
4.101.5 Value Assignment
The value must exist in the Compass Sectors view
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4.102 Direction from Monitor to Probe Obstruction
4.102.1 Description
The direction from the monitor to the obstruction.
4.102.2 Source
User-specified via the Monitor Obstruction Information (MH) Transaction, or the Maintain
Monitor form.
4.102.3 Attributes
Type: Character
Length: 3
Required: Yes
4.102.4 Uses
Probe Obstructions
4.102.5 Value Assignment
The value must exist on the Compass Sectors view.
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4.103 Direction from Receiver to Transmitter
4.103.1 Description
The direction from the receiver to the transmitter at the site.
4.103.2 Source
User-specified, via Site Open Path Information (AC) Transaction, or The Maintain Site form..
4.103.3 Attributes
Type: Character
Length: 3
Required: Yes
4.103.4 Uses
Open Paths
4.103.5 Value Assignment
The value must exist on the Compass Sectors view.
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4.104 Direction from Site to Street
4.104.1 Description
The direction from the site to the street at its nearest point.
4.104.2 Source
User-specified, via Site Street Information (AB) Transaction, or The Maintain Site form..
4.104.3 Attributes
Type: Character
Length: 3
Required: Yes
4.104.4 Uses
Tangent Roads
4.104.5 Value Assignment
The value must exist on the Compass Sectors view.
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4.105 Direction to Meteorological Site
4.105.1 Description
The true, as opposed to the magnetic, direction of the meteorological site from this site.
4.105.2 Source
User-specified via the Basic Site Information (AA) Transaction, or The Maintain Site form..
4.105.3 Attributes
Type: Character
Length: 3
Required: No
4.105.4 Uses
Sites
4.105.5 Value Assignment
The value must exist on the Compass Sectors view.
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4.106 Distance from Central Business District to Site
4.106.1 Description
The distance, in kilometers, to the site from the center of the downtown central business
district of the city in which the site is located.
4.106.2 Source
User-specified, via Sites (AA) Transaction, or The Maintain Site form..
4.106.3 Attributes
Type: Number
Length: 8.2
Required: No
4.106.4 Uses
Sites
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4.107 Distance from Monitor to Probe Obstruction
4.107.1 Description
The distance, in meters, between the probe and obstruction
4.107.2 Source
User-specified via the Monitor Obstruction Information (MH) Transaction, or the Maintain
Monitor form.
4.107.3 Attributes
Type: Number
Length: 8.2
Required: Yes
4.107.4 Uses
Probe Obstructions
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4.108 Distance from Monitor to Tangent Road
4.108.1 Description
The distance in meters between the sensing of air sampling equipment at a monitoring site and
the nearest edge of the roadway.
4.108.2 Source
User-specified via the Monitor Street Description (MG) Transaction, or the Maintain Monitor
form.
4.108.3 Attributes
Type: Number
Length: 8.2
Required: Yes
4.108.4 Uses
Monitor Tangent Roads
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4.109 Distance from Primary Sampler
4.109.1 Description
The distance, in meters, between a duplicate sampler and the primary sampler in a collocated
pair.
4.109.2 Source
User-specified via the Monitor Collocation Period (MJ) Transaction, or the Maintain Monitor
form.
4.109.3 Attributes
Type: Number
Length: 8.2
Required: No
4.109.4 Uses
Monitor Collocation Periods
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4.110 Distance to Meteorological Site
4.110.1 Description
The distance of the associated meteorological site from the air quality monitoring site, in
meters. This information is required if the site has monitors that are part of a Photochemical
Assessment Monitoring System (PAMS) network. The associated site need not be an AQS
site.
4.110.2 Source
User-specified via the Basic Site Information (AA) Transaction, or The Maintain Site form..
4.110.3 Attributes
Type: Number
Length: 8.2
Required: No
4.110.4 Uses
Sites.
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4.111 Dominant Source
4.111.1 Description
The primary source of the pollutant being measured.
4.111.2 Source
User-specified via the Basic Monitor Information (MA) Transaction, or the Maintain Monitor
form.
4.111.3 Attributes
Type: Character
Length: 20
Required: No
4.111.4 Uses
Monitors
4.111.5 Value Assignment
The value must exist on the Dominant Sources view.
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4.112 Duration Code
4.112.1 Description
The length of time, also called interval, used to acquire raw samples that are analyzed by
monitors.
4.112.2 Source
User-specified via the Monitor Protocol (MK), Raw Data (RD), or Composite Data (RC)
Transactions, or the Maintain Monitor form, or system-generated via the Post process.
4.112.3 Attributes
Type: Character
Length: 8
Required: Yes
4.112.4 Uses
Monitor Protocols
NAAQS Averages
Daily Summaries
Quarterly Summaries
Annual Summaries
Site Daily Values
4.112.5 Value Assignment
4.112.5.1 Monitor Protocols
In combination with Parameter Code, Method Code, Reported Unit, Collection Frequency
Code and Composite Type, must exist on the Protocols view.
4.112.5.2 NAAQS Averages, Daily, Quarterly & Annual Summaries, and Site Daily
Values
1 For summarized sample data, the duration used to acquire the sample data being
summarized.
2 For summarized National Ambient Air Quality Standards (NAAQS) averages, the
duration assigned for the NAAQS interval being summarized.
3 For Site Daily Values, the duration associated with the source parameter and duration
being combined.
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4.113 A Region Concurrence Indicator
4.113.1 Description
Indicates whether the appropriate EPA regional office has concurred with either an event-
qualified sample value, or a null ozone sample value qualified with the null data code "BG",
which signifies "Missing ozone data not likely to exceed level of standard".
4.113.2 Source
Specified by the appropriate EPA regional office via AQS Maintain Concurrence (L8).
4.113.3 Attributes
Type: Character
Length: 1
Required: No
4.113.4 Uses
Raw Data
Composite Data
4.113.5 Value Assignment
The valid values are "Y" and "N". "Y" signifies that the regional office has reviewed the
required supporting documentation provided by the data owner, and agrees that use of the
qualification is appropriate. Conversely, "N" signifies that they have reviewed that
documentation, but disagree with the use of the qualification. (No value signifies that the
review has not occurred, or is still in process.)
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4.114 EPA Region Evaluation Date
4.114.1 Description
The date on which the most recent regional evaluation of the site for siting criteria occurred.
4.114.2 Source
User-specified via the Basic Site Information (AA) Transaction, or The Maintain Site form..
4.114.3 Attributes
Type: Date
Length: Not applicable
Required: No
4.114.4 Uses
Sites
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4.115 Estimate of Days Greater Than Standard
4.115.1 Description
The estimated number of days greater than the standard is computed and is utilized to
determine whether the standard is attained. It is computed for specific pollutants when an
exceedance has occurred during the year. The underlying assumption is that missing data is
just as likely to exceed the standard as reported data.
4.115.2 Source
System-generated via the Post process.
4.115.3 Attributes
Type: Number
Length: 3.2
Required: No
4.115.4 Uses
Annual Summaries
4.115.5 Value Assignment
The estimate exceedance is rounded to 1 decimal place.
4.115.5.1 1-Hour Ozone
e = d + *{r - v - a)j
where
e = expected days greater than the standard,
r = Count of Required Days,
v = Count of Valid Days,
a = Count of Missing Days Assumed Less Than Standard,
d = Count of Primary Exceedances.
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4.115.5.2 Daily PM10
4
e=
q= 1
where:
e = estimated number of exceedances for the year,
eq = the estimated number of exceedances for calendar quarter q,
q = the index for calendar quarter, q=l, 2, 3 or 4.
The estimate of the expected number of exceedances for a quarter is calculated using the
following formula:
-0-5Ž
where:
e = the estimated number of exceedances for calendar quarter q,
d = the number of days in calendar quarter q,
v = the number of valued strata in calendar quarter q,
Xj = the number of exceedances in stratum j,
Oj = the number of observations in stratum j,
Qj = the number of days in stratum j, or, when the quarter has partial strata , the number
of days in partial plus adjacent stratum j,
5 = the daily interval of the quarterly minimum collection frequency.
The quarterly exceedance estimate is set to 1 for a calendar quarter in which the first observed
exceedance has occurred if:
There was only one exceedance in the calendar quarter,
Everyday sampling is subsequently initiated and maintained for 4 calendar quarters, in
accordance with 40 CFR 58.13,
Data capture of 75 percent is achieved during the required period of everyday sampling.
In addition, if the first exceedance is observed in a calendar quarter in which the monitor is
already sampling every day, no adjustment for missing data will be made to the first
exceedance if a 75 percent data capture rate was achieved in the quarter in which it was
observed.
For a monitor sampling every 3rd day in 2003, the 1st stratum on the 2nd quarter begins on 4/3. For this
formula, the stratum is expanded to include the preceding partial stratum of 4/1-4/2, and so the partial plus adjacent
stratum is 4/1-4/5. In that same quarter, the last stratum ends on 6/28. That stratum is expanded to include the
succeeding partial stratum of 6/29-6/30, and so the partial plus adjacent stratum is 6/26-6/30.
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4.115.5.3 24-Hour PM10
4
e=
q= 1
where:
e = estimated number of exceedances for the year,
eq = the estimated number of exceedances for calendar quarter q,
q = the index for calendar quarter, q=l, 2, 3 or 4.
The estimate of the expected number of exceedances for a quarter is calculated using the
following formula:
e = the estimated number of exceedances for calendar quarter q,
v = the observed number of exceedances for calendar quarter q,
a = the number of days in calendar quarter q,
n = the number of observations in calendar quarter q.
The quarterly exceedance estimate is set to 1 for a calendar quarter in which the first observed
exceedance has occurred if:
12. There was only one exceedance in the calendar quarter,
13. Everyday sampling is subsequently initiated and maintained for 4 calendar
quarters in accordance with 40 CFR 58.13,
14. Data capture of 75 percent is achieved during the required period of everyday
sampling.
In addition, if the first exceedance is observed in a calendar quarter in which the monitor is
already sampling every day, no adjustment for missing data will be made to the first
exceedance if a 75 percent data capture rate was achieved in the quarter in which it was
observed.
4.115.5.4 Default
Not valued.
where:
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4.116 Exceptional Data Type ID
4.116.1 Description
An AQS designation that indicates how a summary value is affected by exceptional events. It
indicates whether exceptional data exists in the time period being summarized, and whether
such exceptional data is included in the reported summary values.
For summaries of sample measurements, the following Exceptional Data Types are available:
0: No Events. None of the measurement data contributing to the summary (count, mean,
etc.) has been flagged for exceptional event exclusion.
1: All Events Excluded. The summary excludes any measurements that have been
flagged for exceptional event exclusions. (These measurements are excluded whether or
not EPA has concurred with the flagging.)
2: All Events Included. Measurements included in the summary have been flagged for
exceptional event exclusion. (These measuements are included whether or not EPA has
concurred with the flagging.)
Ś 5: Concurred Events Excluded. The summary excludes any measurements that have
been flagged for exceptional event exclusion AND the EPA Regional Office has
concurred with the flagging.)
For any site/monitor and summary time period, either a type 0 summary will exist (no data
was flagged), or a type 1, type 2 and type 5 summary will all exist together.
For summaries created from lower-level summaries (e.g. daily summaries created from
NAAQS_Average rows):
Ś 0: Created only when only lower-level summaries with EDT ID = 0 exist
Ś 1: Created from lower-level summaries with EDT ID 0 and 1
Ś 2: Created from lower-level summaries with EDT ID 0 and 2
Ś 5: Created from lower-level summaries with EDT ID 0 and 5
4.116.2 Source
System-generated via the Post process, or user-generated via either the Annual Summaries
(RS) Transaction or Maintain Annual Summaries (L7).
4.116.3 Attributes
Type: Number
Length: 10.0
Required: Yes
4.116.4 Uses
NAAQS Averages
Daily Summaries
Quarterly Summaries
Annual Summaries
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Site Quarterly Values
Site Design Values
Site Annual Summaries
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4.116.5 Value Assignment
The meaning of the identifiers are as follows:
ID
Description
0
No events
1
Events excluded
2
Events included
3
Exceptional events excluded
4
Natural events excluded
5
Events with concurrence excluded
6
Exceptional events with concurrence excluded
7
Natural events with concurrence excluded
The event qualifiers and types are as follows:
Code Description Type
A
High Winds
Natural Event
B
Stratospheric Ozone Intrusion
Natural Event
C
Volcanic Eruptions
Natural Event
D
Sandblasting
Exceptional Event
E
Forest Fire
Natural Event
F
Structural Fire
Exceptional Event
G
High Pollen Count
Natural Event
H
Chemical Spills & Indust. Accidents
Exceptional Event
I
Unusual Traffic Congestion
Exceptional Event
J
Construction/Demolition
Exceptional Event
K
Agricultural Tilling
Exceptional Event
L
Highway Construction
Exceptional Event
M
Rerouting Of Traffic
Exceptional Event
N
Sanding/Salting Of Streets
Exceptional Event
0
Infrequent Large Gatherings
Exceptional Event
P
Roofing Operations
Exceptional Event
Q
Prescribed Burning
Exceptional Event
R
Clean Up After A Major Disaster
Exceptional Event
S
Seismic Activity
Natural Event
U Sahara Dust Natural Event
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4.117 Exclusion Date
4.117.1 Description
Indicates the date when the data owner flagged the pre-production sample data record to be
excluded from the statistical check/critical review, and post processes.
4.117.2 Source
System-generated via the AQS Maintain Raw Data (L54) or AQS Maintain Composite Data
(L51) modules.
4.117.3 Attributes
Type: Date
Length: Not Applicable
Required: No
4.117.4 Uses
Raw Data
Composite Data
4.117.5 Value Assignment
4.117.5.1 Pre-Production Status
May be valued when the Status Indicator is "R" or "S".
4.117.5.2 Production Status
May not be valued when the Status Indicator is "P".
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4.118 Exclusion Indicator
4.118.1 Description
Indication by the data owner to exclude the pre-production sample data record from the
statistical check/critical review, and post processes.
4.118.2 Source
User-specified via the AQS Maintain Raw Data (L54) or AQS Maintain Composite Data
(L51) modules.
4.118.3 Attributes
Type: Character
Length: 1
Required: No
4.118.4 Uses
Raw Data
Composite Data
4.118.5 Value Assignment
4.118.5.1 Pre-Production Status
May be assigned a value of "Y" when the Status Indicator is "R" or "S".
4.118.5.2 Production Status
May not be assigned a value when the Status Indicator is "P".
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4.119 Expiration Date
4.119.1 Description
The expiration date for the local primary standard.
4.119.2 Source
User-specified, via Accuracy Data (RA) Transaction, or AQS Maintain Accuracy (L62).
4.119.3 Attributes
Type: Date
Length: Not Applicable
Required: No
4.119.4 Uses
Accuracy Data
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4.120 Freeze Indicator
4.120.1 Description
Indicates whether EPA headquarters has determined that the sample value cannot be changed
by the owner of that value.
4.120.2 Source
EPA Headquarters-specified via AQS Restore/Freeze Data (Gl).
4.120.3 Attributes
Type: Character
Length: 3
Required: No
4.120.4 Uses
Raw Data
Composite Data
4.120.5 Value Assignment
May be assigned a value of "Y".
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4.121 Geometric Mean
4.121.1 Description
The measure of central tendency obtained from the sum of the logarithms of observed sample
values in the yearly data set, divided by the number of values, with that result applied as an
exponent to 10.
4.121.2 Source
System-generated via the Post process, or user-generated via either the Annual Summaries
(RS) Transaction or Maintain Annual Summaries (L7).
4.121.3 Attributes
Type: Number
Length: 5.5
Required: No
4.121.4 Uses
Annual Summaries
4.121.5 Value Assignment
4.121.5.1 Total Suspended Particulate (TSP) & Lead
where:
u = mean,
x =
and:
5 = sample value,
n = Count of Observations (Annual).
4.121.5.2 Default
Not valued.
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4.122 Geometric Standard Deviation
4.122.1 Description
The measure of the dispersion about the central tendency of a pollutant that is based on the
variation between the geometric mean of a sample of values and the logarithms of the values
themselves.
4.122.2 Source
System-generated via the Post process, or user-generated via either the Annual Summaries
(RS) Transaction or Maintain Annual Summaries (L7).
4.122.3 Attributes
Type: Number
Length: 7.5
Required: No
4.122.4 Uses
Annual Summaries
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4.122.5 Value Assignment
4.122.5.1 Total Suspended Particulate (TSP) & Lead
<7 = 10*
where:
1.
If the Count of Observations (Annual) is exactly 1, or:
(
7=1
ios/ <
Z!logio#
V 7=1 J
where:
5 = sample value,
n = Count of Observations (Annual),
then the standard deviation is assigned a value of 0.
4.122.5.2 Default
Not valued.
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4.123 Geometric Type
4.123.1 Description
The geometric entity represented by the air-monitoring site.
This data element is required by EPA Locational Data Policy. More information regarding
EPA's data standards and policies may be found on the EPA Environmental Data Registry
(EDR) Website (http://www.epa.gov/edr/).
4.123.2 Source
The system-generated via the Basic Site Information (AA) Transaction, or the Maintain Site
form.
4.123.3 Attributes
Type: Character
Length: 50
Required: Yes
4.123.4 Uses
Sites
4.123.5 Value Assignment
Always "POINT".
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4.124 Half MDL Substitution Indicator
4.124.1 Description
Indicates whether V2 the applicable method detectable limit (MDL) was substituted for the
computed standard sample value when that computed value is less the applicable MDL.
4.124.2 Source
The system-generated via the Raw Data (RD) or Composite Data (RC) Transactions, or AQS
Maintain Raw Data (L54), or AQS Maintain Composite Data (L51).
4.124.3 Attributes
Type: Character
Length: 1
Required: No
4.124.4 Uses
Raw Data
Composite Data
4.124.5 Value Assignment
4.124.5.1 Hourly PM2.5
Will not be assigned a value. (The actual computed standard value is always used in this
case.)
4.124.5.2 Default
May be assigned a value of "Y".
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4.125 Height of Receiver
4.125.1 Description
The height of the receiver above the ground, in meters.
4.125.2 Source
The system-generated via the Site Open Path Information (AC) Transaction, or The Maintain
Site form..
4.125.3 Attributes
Type: Number
Length: 8.2
Required: Yes
4.125.4 Uses
Open Paths
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4.126 Height of Transmitter
4.126.1 Description
The height of the transmitter above the ground, in meters.
4.126.2 Source
The system-generated via the Site Open Path Information (AC) Transaction, or The Maintain
Site form..
4.126.3 Attributes
Type: Number
Length: 8.2
Required: Yes
4.126.4 Uses
Open Paths
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4.127 Horizontal Accuracy
4.127.1 Description
Description of the accuracy of the site coordinates, as a range reported in meters. Only the
least accurate measurement needs to be recorded, whether it is latitude or longitude (or
Universe Transverse Mercator (UTM) coordinates).
For example, here are accuracy standards for various scale maps, assuming that the maps
conform to the national mapping accuracy standards:
1
1,200 V 1.02 meter
1
2,400 V 2.04 meters
1
4,800 V 4.06 meters
1
10,000 V 8.47 meters
1
12,000 V 10.16 meters
1
24,000 V 12.20 meters
1
63,360 V 32.20 meters
1
100,000 V 50.81 meters
Map interpolation would also introduce error.
For Global Positioning System (GPS), the accuracy values vary. The type of GPS used along
with operating conditions affect accuracy. The GPS receiver may provide accuracy values
associated with specific coordinate readings.
This data element is required by EPA Locational Data Policy (LDP). More information
regarding EPA=s data standards and policies may be found on EPA's Environmental Data
Registry (EDR) Website (http://www.epa.gov/edr/).
4.127.2 Source
User-specified via the via the Basic Site Information (AA) Transaction, or The Maintain Site
form..
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4.127.3 Attributes
Type: Number
Length: 8.2
Required: Yes
4.127.4 Uses
Sites
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4.128 Horizontal Collection Method
4.128.1 Description
The code for the method used to determine the latitude/longitude or Universal Transverse
Mercator (UTM) coordinates.
Required by EPA Locational Data Policy (LDP). More information regarding EPA=s data
standards and policies may be found on EPA's Environmental Data Registry (EDR) Website
(http://www.epa.gov/edr/).
4.128.2 Source
User-specified via the Basic Site Information (AA) Transaction, or The Maintain Site form..
4.128.3 Attributes
Type: Character
Length: 8
Required: Yes
4.128.4 Uses
Sites
4.128.5 Value Assignment
Must be a value on the LDP Collection Methods view
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4.129 Hour of Maximum Value
4.129.1 Description
The hour of the day at which the Maximum Value (Daily) was reported.
4.129.2 Source
System-generated via the Post process.
4.129.3 Attributes
Type: Number
Length: 2.0
Required: No
4.129.4 Uses
Daily Summaries
4.129.5 Value Assignment
Must be a value between 0 and 23.
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4.130 HQ Evaluation Date
4.130.1 Description
The date on which the most recent evaluation of the site by EPA headquarters (HQ) occurred.
4.130.2 Source
User-specified via the Basic Site Information (AA) Transaction, or The Maintain Site form..
4.130.3 Attributes
Type: Date
Length: Not Applicable
Required: No
4.130.4 Uses
Sites
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4.131 Indicated Method
4.131.1 Description
Identifies the particular method for collecting and analyzing a precision check value.
4.131.1.1 Analytical
The method used to collect and analyze the known gaseous concentration with which the
sampler is challenged.
4.131.1.2 Flow
The method used to collect and analyze the known flow rate with which the sampler is
challenged.
4.131.1.3 Collocated
The method used to collect and analyze the ambient air sample from the duplicate sampler.
4.131.2 Source
User-specified, via Precision Data (RP) Transaction, or AQS Maintain Precision (L61).
4.131.3 Attributes
Type: Character
Length: 3
Required: Yes
4.131.4 Uses
Precision Data
4.131.5 Value Assignment
The Indicated Method value, in combination with the Parameter value, must exist in the
Sampling Methodologies view.
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4.132 Indicated Value
4.132.1 Description
4.132.1.1 Analytical
The measurement recorded by a monitor for a standard gaseous concentration with which it
has been challenged.
4.132.1.2 Flow
The measurement recorded by a monitor for a standard flow rate with which it has been
challenged.
4.132.1.3 Collocated
The concentration produced from the duplicate sampler in a collocated sampler pair.
4.132.2 Source
For a precision check, user-specified, via Precision Data (RP) Transaction, or AQS Maintain
Precision (L61). For an accuracy audit, user-specified, via Accuracy Data (RA) Transaction,
or AQS Maintain Accuracy (L62).
4.132.3 Attributes
Type: Number
Length: 5.5
Required: Yes
4.132.4 Uses
Precision Data
Accuracy Data
4.132.5 Value Assignment
4.132.5.1 Analytical Check
The Indicated Value for a precision check must not exceed the maximum value allowed for the
Parameter.
4.132.5.2 Collocated Check
The Indicated Value for a precision check must not exceed the maximum value allowed for
the Parameter.
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4.133 Land Use Type
4.133.1 Description
For a site, the prevalent land use within 1/4 mile of that site.
4.133.2 Source
User-specified, via Sites (AA) or AQS Maintain Sites (LI).
4.133.3 Attributes
Type: Character
Length: 20
Required: Yes
4.133.4 Uses
Sites
Open Paths
4.133.5 Value Assignment
The value must exist on the Land Use Types view.
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4.134 Land Use Under Path
4.134.1 Description
For an open path, the prevalent land use under the path of the beam being projected between
the receiver and transmitter.
4.134.2 Source
Open Paths (AC) Transaction, or AQS Maintain Sites (LI), Open Paths.
4.134.3 Attributes
Type: Character
Length: 20
Required: Yes
4.134.4 Uses
Sites
Open Paths
4.134.5 Value Assignment
The value must exist on the Land Use Types view.
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4.135 Last Post Date
4.135.1 Description
The last date and time at which the screening group owner, (or data administrator acting as a
proxy), ran a Post process that posted data for the monitor.
4.135.2 Source
System-generated via the Post process.
4.135.3 Attributes
Type: Date
Length: Not Applicable
Required: No
4.135.4 Uses
Monitors
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4.136 Last Sampling Date
4.136.1 Description
The maximum date for which sample date has been reported for the monitor.
4.136.2 Source
System-generated via the Post process.
4.136.3 Attributes
Type: Date
Length: Not Applicable
Required: No
4.136.4 Uses
Monitors
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4.137 Local Primary Standard
4.137.1 Description
A description of the source of the local primary standards.
4.137.2 Source
User-specified via Accuracy Data (RA) Transaction, or AQS Maintain Accuracy (L62), or
system-generated via Accuracy Data (RA) Transaction, or AQS Maintain Accuracy (L62).
4.137.3 Attributes
Type: Character
Length: 30
Required: Yes
4.137.4 Uses
Accuracy Data
Monitor Accuracy Summaries
Reporting Organization Accuracy Summaries
4.137.5 Value Assignment
4.137.5.1 Accuracy Data
Must be a value on the Local Primary Standards view.
4.137.5.2 Monitor & Reporting Organization Accuracy Summaries
The most frequently assigned value for the population of source data.
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4.138 Local Region
4.138.1 Description
A code representing a state-defined geographic/administrative area within which the site is
located.
4.138.2 Source
User-specified via the Basic Site Information (AA) Transaction, or The Maintain Site form..
4.138.3 Attributes
Type: Character
Length: 8
Required: No
4.138.4 Uses
Sites
4.138.5 Value Assignment
In combination with State Code, the value must exist on the Local Regions view
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4.139 Local Site ID
4.139.1 Description
Identification code used by a state, tribe or local agency, if different from the AQS site ID.
4.139.2 Source
User-specified via the Basic Site Information (AA) Transaction, or The Maintain Site form..
4.139.3 Attributes
Type: Character
Length: 40
Required: No
4.139.4 Uses
Sites.
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4.140 Local Site Name
4.140.1 Description
The locally defined name of the site.
4.140.2 Source
User-specified via the Basic Site Information (AA) Transaction, or The Maintain Site form..
4.140.3 Attributes
Type: Character
Length: 70
Required: No
4.140.4 Uses
Sites
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4.141 Location Setting
4.141.1 Description
A description of the environmental setting within which the site is located.
4.141.2 Source
User-specified via the Basic Site Information (AA) Transaction, or The Maintain Site form..
4.141.3 Attributes
Type: Character
Length: 50
Required: Yes
4.141.4 Uses
Sites
4.141.5 Value Assignment
The value must exist on the Location Settings view.
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4.142 Lower Probability/Confidence Limit (Reporting Organization
Accuracy Summary)
4.142.1 Description
The lower bound of either a probability distribution, or confidence interval, for the applicable
population of accuracy audits.
If either quarter in either half of the year has an Audit Count of 1, then the source data for
both quarters in that half will be merged for purposes of calculating the lower
probability/confidence limit, and reported with the second quarter of the half (i.e., Q2 or Q4).
In this case, there will be no value for the corresponding first quarter in the half (i.e., Q1 or
4.142.2 Source
System-generated via Accuracy Data (RA) Transaction, or Maintain Accuracy (L61).
4.142.3 Attributes
Type: Number
Length: 6.4
Required: No
4.142.4 Uses
Reporting Organization Accuracy Summaries
4.142.5 Value Assignment
4.142.5.1 PM2.5 Flow
/ = lower 95% confidence limit,
I) = Mean (Reporting Organization Accuracy Summary),
S = Standard Deviation (Reporting Organization Accuracy Summary),
10.975, n-i = the 0.975 quantile of the Student's T distribution with degrees of freedom
equal to n-1,
n = Count of Accuracy Audits (Reporting Organization Accuracy Summary).
Q3).
where:
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4.142.5.2 Default
l=D-(S* 1.96)
where:
/ = lower 95% probability limit,
I) = Mean (Reporting Organization Accuracy Summary),
S = Standard Deviation (Reporting Organization Accuracy Summary).
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4.143 Lower Probability/Confidence Limit (Reporting Organization
Precision Summary)
4.143.1 Description
The lower bound of either a probability distribution, or confidence interval, for the applicable
population of precision checks.
4.143.2 Source
System-generated via Precision Data (RP) Transaction, or Maintain Precision (L62).
4.143.3 Attributes
Type: Number
Length: 6.4
Required: No
4.143.4 Uses
Reporting Organization Precision Summaries
4.143.5 Value Assignment
4.143.5.1 Analytical & Non-PM2.5 Flow
/ = lower 95% confidence limit,
I) = Mean (Reporting Organization Precision Summary),
S = Standard Deviation (Reporting Organization Precision Summary),
10.975, n-i = the 0.975 quantile of the Student's T distribution with degrees of freedom
equal to n-1,
n = Count of Precision Checks (Reporting Organization Precision Summary).
where:
/ = lower 95% probability limit,
I) = Mean (Reporting Organization Precision Summary),
S = Standard Deviation (Reporting Organization Precision Summary).
4.143.5.2 PM2.5 Flow
where:
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4.143.5.3 PM2.5 Collocated
/= CV
y2
0.95, it
n
where:
/ = lower 90% confidence limit,
CV = coefficient of variation,
n = Count of Valid Collocated Data Pairs (Reporting Organization Precision Summary),
X20.95,n = the 0.95 quantile of the chi-square distribution with degrees of freedom equal to
/ = lower 95% probability limit,
I) = Mean (Reporting Organization Precision Summary),
S = Standard Deviation (Reporting Organization Precision Summary).
4.143.5.5 Federal Reference Method (FRM) Audit
/ = lower 95%) confidence limit,
I) = Mean (Reporting Organization Precision Summary),
S = Standard Deviation (Reporting Organization Precision Summary),
10.975, n-i = the 0.975 quantile of the Student's T distribution with degrees of freedom
equal to n-1,
n = Count of Precision Checks (Reporting Organization Precision Summary).
n.
4.143.5.4 Other Collocated
where:
where:
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4.144 Maximum Beam Height
4.144.1 Description
The height of the beam (at the highest point from the ground) being projected between the
receiver and transmitter at the site, in meters.
4.144.2 Source
User-specified via the Site Open Path Information (AC) Transaction, or The Maintain Site
form..
4.144.3 Attributes
Type: Number
Length: 8.2
Required: Yes
4.144.4 Uses
Open Paths
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4.145 Maximum Indicator
4.145.1 Description
An indication of the type of maximum value.
4.145.2 Source
System-generated via the Post process.
4.145.3 Attributes
Type: Character
Length: 3
Required: Yes
4.145.4 Uses
Summary Maximums
4.145.5 Value Assignment
Indicator
Description
OVR
Non-overlapping 8-Hour Carbon
Monoxide
ACT
Actual 8-Hour Carbon Monoxide
REG
All other cases
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4.146 Maximum Level
4.146.1 Description
The numeric rank of a value, relative to other values in the same value set, in descending
value order.
4.146.2 Source
System-generated via the Post process.
4.146.3 Attributes
Type: Number
Length: 4.0
Required: Yes
4.146.4 Uses
Summary Maximums
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4.147 Maximum Value (Annual)
4.147.1 Description
A value in a value set of a certain associated Daily Rank, relative to other values in the same
value set.
4.147.2 Source
System-generated via the Post process.
4.147.3 Attributes
Type: Number
Length: 5.5
Required: Yes
4.147.4 Uses
Summary Maximums
Site Annual Summaries
4.147.5 Value Assignment
4.147.5.1 Ozone (1-Hour & 8-Hour)
The ten highest 1-hour or 8-hour Maximum Value (Daily) values for the year, regardless of
monitoring season or whether daily summary criteria were met.
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4.147.5.2 Non-Overlapping 8-Hour Carbon Monoxide
The two highest valid 8-hour Arithmetic Mean (NAAQS) values of the year where there is at
least one other non-overlapping Arithmetic Mean (NAAQS) that is greater than, or equal to,
the second highest average, and the dates and hours for which each was computed. (Note:
The first actual maximum is always the first non-overlapping maximum.)
In the following example, the fourth actual maximum is the second non-overlapping
maximum because, while it overlaps the first and second actual maximums, it does not
overlap the third. Since the second actual overlaps the first, and the third overlaps both the
first and second, neither one qualifies to be the second non-overlapping maximum.
Actual
Rank
8-Hour
Average
(mg)
Date/Time
Does it overlap all of the
higher values?
1
16
Dec. 8 10:01 AM-6:00 PM
2
15
Dec. 8 9:01 AM-5:00 PM
Yes
3
15
Dec. 8 11:01 AM-7:00 PM
Yes
4
14
Dec. 8 3:01 AM-11:00 AM
No
5
13
Nov. 20 10:01 AM - 6:00 PM
6
13
Nov. 11 11:01 AM-7:00 PM
7
13
Feb. 9 9:01 AM-5:00 PM
8
12
Nov. 11 10:01 AM-6:00 PM
9
12
Oct. 29 10:01 AM-6: 00 PM
4.147.5.3 Actual 8-Hour Carbon Monoxide
The ten highest valid 8-hour Arithmetic Mean (NAAQS) values of the year, regardless of
whether they overlap.
4.147.5.4 Site-Level PM2.5
Maximum value of all site daily means
4.147.5.5 Default
The ten highest values for the year
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4.148 Maximum Value (and Second Highest through Fifth Highest)
4.148.1 Description
A value in a value set of a certain associated Daily Rank, relative to other values in the same
value set.
4.148.2 Source
User-generated using Annual Summary (RS) transaction, or AQS Maintain Annual Summary
Information (LI).
4.148.3 Attributes
Type: Number
Length: 5.5
Required: Yes
4.148.4 Uses
Summary Maximums
4.148.5 Value Assignment
On entry: Calculated and reported by the user in appropriate order.
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4.149 Maximum Value (and Second Highest through Fourth Highest)
4.149.1 Description
A value in a value set of a certain associated Daily Rank, relative to other values in the same
value set.
4.149.2 Source
System generated through post process
4.149.3 Attributes
Type: Number
Required: No
4.149.4 Uses
Site Annual Summaries
4.149.5 Value Assignment
4.149.5.1 Site Level PM2.5
First through fourth maximum value among all site daily means for the year
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4.150 Maximum Value (Daily)
4.150.1 Description
The maximum value for the 24-hour period.
4.150.2 Source
System-generated via the Post process.
4.150.3 Attributes
Type: Number
Length: 5.5
Required: Yes
4.150.4 Uses
Daily Summaries
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4.151 Maximum Value Date
4.151.1 Description
The date for which an annual Maximum Value was recorded.
4.151.2 Source
User specified via Summary (RS) Transaction, or AQS Maintain Annual Summary
Information (L7).
4.151.3 Attributes
Type: Date
Length: 8
Required: Yes
4.151.4 Uses
Forms and reports
4.151.5 Value Assignment
On input: Coupled with Maximum Value Time to set Maximum Value Date/Time on
field where Maximum Level = 1
On output: Extracted from Maximum Value Date/Time on field where Maximum
Level = 1
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4.152 Maximum Value Date of Second Highest
4.152.1 Description
The date for which a second highest Maximum Value was recorded.
4.152.2 Source
User specified via Summary (RS) Transaction, or AQS Maintain Annual Summary
Information (LI).
4.152.3 Attributes
Type: Date
Length: 8
Required: Yes
4.152.4 Uses
Forms and reports
4.152.5 Value Assignment
On input: Coupled with Maximum Value Time to set Maximum Value Date/Time on
record where Maximum Level = 2
On output: Extracted from Maximum Value Date/Time on record where Maximum
Level = 2
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4.153 Maximum Value Date/Time
4.153.1 Description
The date and time for which an annual Maximum Value was recorded.
4.153.2 Source
System-generated as part of the Post process.
4.153.3 Attributes
Type: Date
Length: Not Applicable
Required: Yes
4.153.4 Uses
Summary Maximums
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4.154 Maximum Value Time
4.154.1 Description
The 24-hour clock time at which an annual Maximum Value was recorded.
4.154.2 Source
User specified via Summary (RS) Transaction, or AQS Maintain Annual Summary
Information (LI).
4.154.3 Attributes
Type: Date
Length: 5
Required: Yes
4.154.4 Uses
Forms and reports
4.154.5 Value Assignment
On input: Coupled with Maximum Value Date to set Maximum Value Date/Time on field
where Maximum Level = 1
On output: Extracted from Maximum Value Date/Time on field where Maximum
Level = 1
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4.155 Maximum Value Date of Second Highest
4.155.1 Description
The 24-hour clock time at which a second highest Maximum Value was recorded.
4.155.2 Source
User specified via Summary (RS) Transaction, or AQS Maintain Annual Summary
Information (LI).
4.155.3 Attributes
Type: Date
Length: 5
Required: Yes
4.155.4 Uses
Forms and reports
4.155.5 Value Assignment
On input: Coupled with Maximum Value Date to set Maximum Value Date/Time on
record where Maximum Level = 2
On output: Extracted from Maximum Value Date/Time on record where Maximum
Level = 2
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4.156 Mean (Monitor Accuracy Summary)
4.156.1 Description
A measure of the central tendency of the applicable population of accuracy audits.
4.156.2 Source
System-generated via Accuracy Data (RA) Transaction, or Maintain Accuracy (L61).
4.156.3 Attributes
Type: Number
Length: 5.5
Required: No
4.156.4 Uses
Monitor Accuracy Summaries
4.156.5 Value Assignment
n
D=
n
where:
D = estimate of accuracy (mean),
di = Percent Difference of a analytical or flow audit,
n = Count of Accuracy Audits (Monitor Accuracy Summary).
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4.157 Mean (Monitor Precision Summary)
4.157.1 Description
A measure of the central tendency of the applicable population of precision checks.
4.157.2 Source
System-generated via Precision Data (RP) Transaction, or Maintain Precision (L62).
4.157.3 Attributes
Type: Number
Length: 6.4
Required: Yes
4.157.4 Uses
Monitor Precision Summaries
4.157.5 Value Assignment
4.157.5.1 Analytical & Flow
where:
CV = coefficient of variation, i.e., estimate of precision,
dt = Percent Difference of a valid collocated data pair,
n = Count of Valid Collocated Data Pairs (Monitor Precision Summary).
n
D=
D = estimate of precision (mean),
di = Percent Difference of an analytical or flow precision check,
n = Count of Precision Checks (Monitor Precision Summary).
4.157.5.2 Collocated (PM2.5)
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4.157.5.3 Collocated (Other)
n
id,
i-\
n
where:
D = estimate of precision (mean),
dt = Percent Difference of a valid collocated data pair,
n = Count of Valid Collocated Data Pairs (Monitor Precision Summary).
D
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4.158 Mean (Reporting Organization Accuracy Summary)
4.158.1 Description
A measure of the central tendency of the applicable population of accuracy audits.
4.158.2 Source
System-generated via Accuracy Data (RA) Transaction, or Maintain Accuracy (L61).
4.158.3 Attributes
Type: Character
Length: 5.5
Required: No
4.158.4 Uses
Reporting Organization Accuracy Summaries
4.158.5 Value Assignment
where:
D = estimate of accuracy (mean),
di = Percent Difference of a analytical or flow audit,
n = Count of Accuracy Audits (Reporting Organization Accuracy Summary).
If either quarter in either half of the year has a Count of Accuracy Audits (Reporting
Organization Accuracy Summary) of 1, then the source data for both quarters in that half will
be merged for purposes of calculating the mean, and reported with the second quarter of the
half (i.e., Q2 or Q4). In this case, there will be no value for the corresponding first quarter in
n
D=
n
the half (i.e., Q1 or Q3).
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4.159 Mean (Reporting Organization Precision Summary)
4.159.1 Description
A measure of the central tendency of the applicable population of precision checks.
4.159.2 Source
System-generated via Precision Data (RP) Transaction, or Maintain Precision (L62).
4.159.3 Attributes
Type: Number
Length: 6.4
Required: No
4.159.4 Uses
Reporting Organization Precision Summaries
4.159.5 Value Assignment
4.159.5.1 Analytical & Flow
D = estimate of precision (mean),
di = Percent Difference of a analytical or flow precision check,
n = Count of Precision Checks (Reporting Organization Precision Summary).
4.159.5.2 Collocated (PM 2.5)
where:
CV = coefficient of variation, i.e., estimate of precision,
dt = Percent Difference of a valid collocated data pair,
n = Count of Valid Collocated Data Pairs (Reporting Organization Precision Summary).
n
D=
n
where:
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4.159.6 Collocated (Other)
n
D =
i= 1
n
where:
D = estimate of precision (mean),
di = Percent Difference of a valid collocated data pair,
n = Count of Valid Collocated Data Pairs (Reporting Organization Precision Summary).
4.159.6.1 Federal Reference Method (FRM) Audit
n
D = estimate of precision (mean),
di = Percent Difference of an FRM audit pair,
n = Count of Precision Checks (Reporting Organization Precision Summary) (i.e., FRM
Ł>=
n
where:
audits).
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4.160 Mean Completeness Indicator (Annual)
4.160.1 Description
Flag indicating whether the annual mean is complete
4.160.2 Source
System generated during Post process
4.160.3 Attributes
Type: Varchar2
Length: 1
Required: No
4.160.4 Uses
Site Annual Summaries
4.160.5 Value Assignment
4.160.5.1 Site-Level PM2.5
The valid values are "Y" and "N". Set to "complete" (i.e. ' Y') according to the following
rules:
All 4 site-level quarterly summaries are present, and
One of the following is true:
o All 4 quarters are 75% complete, or
o All quarters have at least 11 actual values and the annual mean > the annual
standard (i.e. 15), or
The Substituted Annual Mean exists and is greater than the annual standard (i.e. 15)
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4.161 Measurement Scale
4.161.1 Description
A denotation of the geographic scope of the air quality measurements made by the monitor.
The implication is that the same measurement made elsewhere within the measurement scale
would produce an equivalent result to that produced at the monitoring site.
4.161.2 Source
User-specified via the Basic Monitor Information (MA) Transaction, or the Maintain Monitor
form.
4.161.3 Attributes
Type: Character
Length: 20
Required: No
4.161.4 Uses
Monitors
4.161.5 Value Assignment
The value must exist on the Measurement Scales view.
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4.162 Meteorological Site ID
4.162.1 Description
The AQS site ID where meteorological data is collected, if not collected at this site.
4.162.2 Source
User-specified via the Basic Site Information (AA) Transaction, or The Maintain Site form..
4.162.3 Attributes
Type: Character
Length: 11
Required: No
4.162.4 Uses
Sites
4.162.5 Value Assignment
The value must reference an existing record on the Sites view.
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4.163 Meteorological Site Type
4.163.1 Description
The type of meteorological station identified for the monitoring site. Required for sites with
monitors in a Photochemical Assessment Monitoring System (PAMS) network.
4.163.2 Source
User-specified via the Basic Site Information (AA) Transaction, or The Maintain Site form..
4.163.3 Attributes
Type: Character
Length: 20
Required: No
4.163.4 Uses
Sites
4.163.5 Value Assignment
The value must exist on the Met Site Types view
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4.164 Method Code
4.164.1 Description
A code representing a particular method for collecting and analyzing samples of the specified
parameter.
4.164.2 Source
User-specified via the Monitor Protocol (MK), Raw Data (RD), or Composite Data (RC)
Transactions, or the Maintain Monitor form.
4.164.3 Attributes
Type: Character
Length: 8
Required: Yes
4.164.4 Uses
Monitor Protocols
4.164.5 Value Assignment
In combination with Parameter, the value must exist on the Sampling Methodologies view.
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4.165 Minimum Beam Height
4.165.1 Description
The height of the beam (at the lowest point from the ground) being projected between the
receiver and transmitter at the site, in meters.
4.165.2 Source
4.165.3 Source
User-specified via the Site Open Path Information (AC) Transaction, or The Maintain Site
form..
4.165.4 Attributes
Type: Number
Length: 8.2
Required: Yes
4.165.5 Uses
Open Paths
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4.166 Minimum Collection Frequency
4.166.1 Description
The code for the minimum collection frequency with which the yearly samples were reported.
4.166.2 Source
System-generated via the Post process.
4.166.3 Attributes
Type: Character
Length: 8
Required: No
4.166.4 Uses
Annual Summaries
4.166.5 Value Assignment
4.166.5.1 Daily PM10
Must be assigned a value, which is a code on the Collection Frequencies table.
4.166.5.2 24-Hour PM10
Always valued with "1", which signifies "Every Day" on the Collection Frequencies table.
4.166.5.3 Default
Not valued.
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4.167 Minimum Sample Value
4.167.1 Description
The lowest value for the year.
4.167.2 Source
System-generated via the Post process.
4.167.3 Attributes
Type: Number
Length: 5.5
Required: No
4.167.4 Uses
Annual Summaries
4.167.5 Value Assignment
4.167.5.1 Ozone (1-Hour and 8-Hour)
The lowest 1-hour or 8-hour Maximum Value (Daily) that occurred in the year, regardless of
monitoring season or whether daily summary criteria were met.
4.167.5.2 Non-Ozone National Ambient Air Quality Standards (NAAQS) Durations
The lowest valid Arithmetic Mean (NAAQS) that occurred in the year.
4.167.5.3 Default
The lowest sample data value that occurred in the year.
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4.168 Modified Date
4.168.1 Description
The date when the record was last modified.
4.168.2 Source
System-generated via any of the AQS transactions, or any of the Maintain modules.
4.168.3 Attributes
Type: Date
Length: Not applicable
Required: No
4.168.4 Uses
Sites
Tangent Roads
Open Paths
Primary Monitor Periods
Monitors
Monitor Pollutant Areas
Sample Periods
Monitor Type Assignments
Monitor Agency Roles
Monitor Objectives
Required Collection Frequencies
Sample Schedules
Monitor Tangent Roads
Probe Obstructions
Monitor Regulatory Compliances
Monitor Collocation Periods
Monitor Protocols
Accuracy Data
Precision Data
Annual Summaries
Site Daily Values
Site Annual Summaries
Site Quarterly Summaries
Site Design Values
Summary Percentiles
Summary Maximums
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4.169 Modified User
4.169.1 Description
The Oracle ID of the user who last modified the record.
4.169.2 Source
System-generated via any of the AQS transactions, or any of the Maintain modules.
4.169.3 Attributes
Type: Character
Length: 40
Required: No
4.169.4 Uses
Sites
Tangent Roads
Open Paths
Primary Monitor Periods
Monitors
Monitor Pollutant Areas
Sample Periods
Monitor Type Assignments
Monitor Agency Roles
Monitor Objectives
Required Collection Frequencies
Sample Schedules
Monitor Tangent Roads
Probe Obstructions
Monitor Regulatory Compliances
Monitor Collocation Periods
Monitor Protocols
Accuracy Data
Precision Data
Annual Summaries
Site Daily Values
Site Annual Summaries
Site Quarterly Summaries
Site Design Values
Summary Percentiles
Summary Maximums
4.169.5 Value Assignment
The value must exist on the AIRS User Profiles view.
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4.170 Monitor ID
4.170.1 Description
The AIRS Monitor ID, which identifies the monitor to which the data applies.
4.170.2 Source
User-specified by any of the following transactions:
Basic Monitor Information (MA)
Monitor Sampling Periods (MB)
Monitor Type Information (MC)
Monitor Agency Role (MD)
Monitoring Objective Information (ME)
Monitor Sampling Schedule (MF)
Monitor Street Description (MG)
Monitor Obstruction Information (MH)
Monitor Regulatory Compliance (MI)
Monitor Collocation Period (MJ)
Monitor Protocol (MK)
Composite Raw Data (RC)
Raw Data (RD)
Accuracy Data (RA)
Precision Data (RP)
Blank Data (RB)
Annual Summary (RS)
or user-specified via any of the following AQS Maintenance Forms:
Maintain Monitor (L2)
Maintain Composite Data (L51)
Maintain Blank Data (L53)
Maintain Raw Data (L54)
Maintain Accuracy Data (L62)
Maintain Precision Data (L61)
Maintain Annual Summary (L7)
or system-generated via the Post process, or system-generated via the Accuracy Data (RA) or
Precision Data (RP) Transactions, or system-generated via AQS Maintain Accuracy Data
(L62) or AQS Maintain Precision Data (L61).
4.170.3 Attributes
Type: Character
Length: 20
Required: Yes
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4.170.4 Uses
Monitors
Monitor Pollutant Areas
Sample Periods
Monitor Type Assignments
Monitor Agency Roles
Monitor Objectives
Required Collection Frequencies
Sample Schedules
Monitor Tangent Roads
Probe Obstructions
Monitor Regulatory Compliances
Monitor Collocation Periods
Monitor Protocols
Composite Data
Composite Qualifier Details
Raw Data
Raw Qualifier Details
Precision Data
Accuracy Data
Blank Data
Blank Qualifier Details
Comments
NAAQS Averages
Daily Summaries
Quarterly Summaries
Annual Summaries
Summary Maximums
Summary Percentiles
Summary Protocols
Monitor Precision Summaries
Precision Summary Protocols
Monitor Accuracy Summaries
Accuracy Summary Protocols
4.170.5 Value Assignment
The value is a concatenation of State Code, County Code, Site ID, Parameter, and POC, with
each separated by
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4.171 Monitor Objective Type
4.171.1 Description
Identification of the reason for measuring air quality by the monitor.
4.171.2 Source
User-specified via the Monitoring Objective Information (ME) Transaction, or the Maintain
Monitor form
4.171.3 Attributes
Type: Character
Length: 50
Required: Yes
4.171.4 Uses
Monitor Objectives
4.171.5 Value Assignment
The value must exist on the Monitor Objective Types view.
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4.172 Monitor Protocol ID
4.172.1 Description
The sequential identification number used to distinguish combinations of sample duration,
unit, method, collection frequency, composite type, and alternate method detectable limit
(MDL) for a monitor.
4.172.2 Source
User-specified via the Monitor Protocols (MK), Composite Data (RC), Raw Data (RD),
Blanks Data (RB), Accuracy Data (RA), or Precision Data (RP) Transactions, or the Maintain
Monitor form.
4.172.3 Attributes
Type: Number
Length: 4.0
Required: Yes
4.172.4 Uses
Monitor Protocols
Raw Data
Composite Data
Blank Data
Accuracy Data
Precision Data
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4.173 Monitor Protocol ID (Annual)
4.173.1 Description
The ID for one of the protocols used to collect, analyze, and report the monitor's sample data
for the year.
4.173.2 Source
System-generated via the Post process.
4.173.3 Attributes
Type: Number
Length: 4.0
Required: Yes
4.173.4 Uses
Summary Protocols
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4.174 Monitor Protocol ID (Monitor Accuracy Summary)
4.174.1 Description
The protocols used to collect, analyze, and report the audits for the time period.
4.174.2 Source
System-generated via the Accuracy Data (RA) Transaction, or AQS Maintain Accuracy Data
(L62).
4.174.3 Attributes
Type: Number
Length: 4.0
Required: Yes
4.174.4 Uses
Accuracy Summary Protocols
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4.175 Monitor Protocol ID (Monitor Precision Summary)
4.175.1 Description
The protocols used to collect, analyze, and report the precision checks for the time period.
4.175.2 Source
System-generated via the Precision Data (RP) Transaction, or AQS Maintain Precision Data
(L61).
4.175.3 Attributes
Type: Number
Length: 4.0
Required: Yes
4.175.4 Uses
Precision Summary Protocols
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4.176 Monitor Type
4.176.1 Description
An administrative classification for the monitor.
4.176.2 Source
User-specified via the Monitor Type Information (MC), or the Maintain Monitor form.
4.176.3 Attributes
Type: Character
Length: 20
Required: Yes
4.176.4 Uses
Monitor Type Assignments
4.176.5 Value Assignment
The value must exist on the Monitor Types view.
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4.177 Monitor Type Begin Date
4.177.1 Description
The date on which the monitor type assignment went into effect
4.177.2 Source
User-specified via the Monitor Type Information (MC), or the Maintain Monitor form.
4.177.3 Attributes
Type: Date
Length: Not Applicable
Required: Yes
4.177.4 Uses
Monitor Type Assignments
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4.178 Monitor Type End Date
4.178.1 Description
The date on which a monitor type assignment ends.
4.178.2 Source
User-specified via the Monitor Type Information (MC), or the Maintain Monitor form.
4.178.3 Attributes
Type: Date
Length: Not Applicable
Required: No
4.178.4 Uses
Monitor Type Assignments
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4.179 Monthly Required Collection Frequency
4.179.1 Description
Specifies the collection frequency required for the Sample Schedule Month when the
Required Collection Frequency Code represents "Stratified Random", "Random", or
"Seasonal".
4.179.2 Source
User-specified via the Monitor Sampling Schedule (MF), or the Maintain Monitor form.
4.179.3 Attributes
Type: Character
Length: 8
Required: Yes
4.179.4 Uses
Sample Schedules
4.179.5 Value Assignment
The value must exist on the Collection Frequencies view.
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4.180 MSA Represented
4.180.1 Description
The Metropolitan Statistical Area (MSA) from which the concentrations originated, not the
location of the monitor.
4.180.2 Source
User-specified via the Monitoring Objective Information (ME) Transaction, or the Maintain
Monitor form.
4.180.3 Attributes
Type: Character
Length: 8
Required: No
4.180.4 Uses
Monitor Objectives
4.180.5 Value Assignment
Must have a value if none of CBSA Represented, CMSA Represented, CSA Represented, or
Urban Area Represented are valued. Conversely, must not have a value if any of CBSA
Represented, CMSA Represented, CSA Represented, or Urban Area Represented are valued.
If valued, that value must exist on the MSAs view.
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4.181 NAA QS Date/Time
4.181.1 Description
The date and hour identifying a National Ambient Air Quality Standards (NAAQS) average.
4.181.2 Source
System-generated via the Post process.
4.181.3 Attributes
Type: Date
Length: Not Applicable
Required: Yes
4.181.4 Uses
NAAQS Averages
4.181.5 Value Assignment
4.181.5.1 8-Hour Ozone
The first hour of the 8-hour period.
4.181.5.2 8-Hour Carbon Monoxide
The last hour of the 8-hour period.
4.181.5.3 3-Hour Sulfur Dioxide
The last hour of the 3-hour period.
4.181.5.4 24-Hour Sulfur Dioxide, PM10, & PM2.5
The last hour of the 24-hour period.
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4.182 Null Data Code
4.182.1 Description
This is a code to explain why no sample or blank value was reported.
4.182.2 Source
User-specified, via the Raw Data (RD) or Raw Blanks (RB) transactions, or AQS Maintain
Raw Data or Maintain Blanks Data forms.
4.182.3 Attributes
Type: Character
Length: 8
Required: No
4.182.4 Uses
Raw Data and Blanks Data
4.182.5 Value Assignment
On Data Input: A Null Data Code is stored in Qualifier Code field.
The value must exist as a NULL type in the Qualifiers view.
A Null Data Code precludes entry of other Qualifier Codes
A Null Data Code requires an empty Sample Value in the Record.
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4.183 Number of Samples
4.183.1 Description
Indicates the number of samples that were combined to yield the composite sample value.
4.183.2 Source
User-specified via the Composite Data (RC) Transaction, or AQS Maintain Composite Data
(L51).
4.183.3 Attributes
Type: Number
Length: 10.0
Required: Yes
4.183.4 Uses
Composite Data
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4.184 Open Path Number
4.184.1 Description
A unique numeric identifier for the individual open path at a site. Each open path represents a
different monitor.
4.184.2 Source
User-specified via the Site Open Path Information (AC) Transaction, or The Maintain Site
form..
4.184.3 Attributes
Type: Number
Length: 12.0
Required: Yes
4.184.4 Uses
Open Paths
Monitors
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4.185 Parameter
4.185.1 Description
The code assigned to the parameter measured by the monitor. Parameters may be pollutants
or non-pollutants.
4.185.2 Source
User-specified
4.185.3 Attributes
Type: Character
Length: 5
Required: Yes
4.185.4 Uses
Monitors
Primary Monitor Periods
Reporting Organization Precision Summaries
Reporting Organization Accuracy Summaries
Site Daily Values
Site Design Values
Site Quarterly Summaries
Site Annual Summaries
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4.186 Percent Difference
4.186.1 Description
The measure of variation between the values in a precision check or accuracy audit value pair.
4.186.2 Source
System-generated via the Accuracy Data (RA) or Precision Data (RP) Transactions, or AQS
Maintain Accuracy (L62), or AQS Maintain Precision (L61).
4.186.3 Attributes
Type: Number
Length: Unbounded
Required: Yes
4.186.4 Uses
Precision Data
Accuracy Data
4.186.5 Value Assignment
4.186.5.1 Analytical & Flow
X
where:
d = percent difference,
Y = indicated concentration or flow rate,
X = actual, or known, concentration or flow rate,
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4.186.5.2 Pre-2007 Collocated Pairs
V 2
where:
d = percent difference,
X= measurement produced by primary sampler (routine monitor), i.e., the Actual Value,
Y = measurement produced by duplicate sampler (monitor used for quality control), i.e.,
the Indicated Value.
4.186.5.3 Federal Reference Method (FRM) Audit
d = percent difference,
Y = measurement produced from the state-operated sampler, i.e. Indicated Value,
X = measurement produced from the Performance Evaluation Program (PEP) sampler,
i.e., Actual Value.
X
where:
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4.187 Percent of Observations (Annual)
4.187.1 Description
The percent of actual data values that were reported compared to the number of data values
that could have been reported for the year.
4.187.2 Source
System-generated via the Post process, or user-generated via either the Annual Summaries
(RS) Transaction or Maintain Annual Summaries (L7).
4.187.3 Attributes
Type: Number
Length: 6.4
Required: No
4.187.4 Uses
Annual Summaries
4.187.5 Value Assignment
The value is always rounded to the integer.
4.187.5.1 1-Hour Ozone
where:
p = percentage,
v = Count of Valid Days,
r = Count of Required Days.
4.187.5.2 8-Hour Ozone
/ A
where:
p = percentage,
v = Count of Valid Days,
a = Count of Missing Days Assumed Less Than Standard,
r = Count of Required Days.
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4.187.5.3 Daily & 24-Hour PM2.5 & PM10
p=(%,)*100
where:
p = percentage,
v = Count of Valid Days,
m = number of scheduled days (i.e., Count of Required Days).
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4.187.5.4 8-Hour Carbon Monoxide, and 3-Hour & 24-Hour Sulfur Dioxide
Not valued.
4.187.5.5 Default Daily
Not valued.
4.187.5.6 Default Hourly
where:
p = observation percentage,
n = Count of Observations (Annual),
I = duration length (in hours),
a = number of active days in the year.
(
*100
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4.188 Percent of Observations (Daily)
4.188.1 Description
The percent of actual data values that were reported compared to the number of data values
that could have been reported for the 24-hour period.
4.188.2 Source
System-generated via the Post process.
4.188.3 Attributes
Type: Number
Length: 6.4
Required: No
4.188.4 Uses
Daily Summaries
4.188.5 Value Assignment
The value is always rounded to the integer.
(
*100
where:
p = observation percentage,
n = Count of Observations (Daily),
I = duration length (in hours).
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4.189 Percent of Observations (Quarterly)
4.189.1 Description
The percent of actual data values that were reported compared to the number of data values
that could have been reported for the quarter.
4.189.2 Source
System-generated via the Post process.
4.189.3 Attributes
Type: Number
Length: 6.4
Required: No
4.189.4 Uses
Quarterly Summaries
Site Quarterly Summaries
4.189.5 Value Assignment
The value is always rounded to the integer.
4.189.5.1 1-Hour & 8-Hour Ozone
p = observation percentage,
n = number of samples or 8-hour averages in the quarter, regardless of monitoring season,
(i.e., Count of Observations (Quarterly)),
q = number of active days in the quarter, regardless of monitoring season.
4.189.5.2 24-Hour PM2.5&PM10
where:
p = observation percentage,
n = number of valid 24-hour block averages (i.e.. Number of Observations (Quarterly)),
q = number of active days in the quarter.
where:
/ A
*100
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4.189.5.3 Daily PM10
( A
""V/Q
*100
where:
p = observation percentage,
v = number of valued strata (i.e., Count of Valid Days),
r = number of scheduled days (i.e., Count of Required Days).
A valid stratum is one where the scheduled day occurs in the quarter and at least one
observation occurs in the stratum.
Scheduled days are the number of days within the quarter that were scheduled for sampling,
as determined by the EPA-defined calendar for the required collection frequency, and which
also fall within the period of operation, as defined by sampling periods.
Seasonal and random frequencies are sub-divided in monthly-required frequencies; otherwise,
the required frequency applies to a defined period of time
The reference point for the EPA calendar is January 4, 1956. For example, in the year 2003,
the every 6th day calendar would comprise: 1/3/2003, 1/9/2003, 1/15/2003, etc., and the every
3rd day calendar would comprise: 1/3/2003, 1/6/2003, 1/9/2003, 1/12/2003, etc. For a monitor
doing seasonal sampling, with every 6th day sampling in April and every 3rd day sampling in
May, both months in 2003, the schedule would be as follows: 4/15/03, 4/21/03, 4/27/03,
5/3/03, 5/6/03, 5/9/03, etc.
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4.189.5.4 PM2.5
V. rioo
where:
p = observation percentage,
v = Count of Valid Days,
r = number of scheduled days (i.e., Count of Required Days).
Valid days are equal to the sum of valued, scheduled sampling days, plus make-ups for
missing scheduled days. A make-up day is a sample recorded in the same stratum as, or
exactly seven days after, a missing scheduled sample. In both conditions, the make-up sample
must occur within the same quarter as the missed sample. A maximum of five make-up
samples are allowed per quarter.
Scheduled days are the number of days within the quarter that were scheduled for sampling,
as determined by the EPA-defined calendar for the required collection frequency, and which
also fall within a period of operation, as defined in sampling periods.
Seasonal and random frequencies are sub-divided in monthly-required frequencies; otherwise,
the required frequency applies to a defined period of time. A PM2.5 monitor must have a
defined collection frequency for each active day, by rule.
The reference point for the EPA calendar is January 4, 1956. For example, in the year 2003,
the every 6th day calendar would comprise: 1/3/2003, 1/9/2003, 1/15/2003, etc., and the every
3rd day calendar would comprise: 1/3/2003, 1/6/2003, 1/9/2003, 1/12/2003, etc. For a monitor
doing seasonal sampling, with every 6 day sampling in April and every 3r day sampling in
May, the scheduled days for 2003 would be as follows: 4/15/03, 4/21/03, 4/27/03, 5/3/03,
5/6/03, 5/9/03, etc.
4.189.5.5 Site-Level PM2.5 (Quarterly)
where:
p = observation percentage,
v = Count of Valid Days in the quarter,
r = number of scheduled days (i.e., Count of Required Days) in the quarter.
4.189.5.6 Default Hourly
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(
p =
V
*100
where:
p = observation percentage,
n = Count of Observations (Quarterlyj,
I = duration length (in hours),
a = number of active days in the quarter.
4.189.6 Default Daily
Not valued.
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4.190 Percentile
4.190.1 Description
An EPA-assigned percentile level for which a Percentile Sample Value is determined.
4.190.2 Source
System-generated via the Post Process, or user-specified via the Annual Summary (RS)
Transaction or AQS Maintain Annual Summary (L7).
4.190.3 Attributes
Type: Number
Length: 3
Required: Yes
4.190.4 Uses
Summary Percentiles
4.190.5 Value Assignment
The possible values are: 10, 25, 50, 75, 90, 95, 98, and 99.
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4.191 Percentile Sample Value
4.191.1 Description
The value for the year where there are k values less than or equal to it, where k is the
calculated rank for the Percentile.
4.191.2 Source
System-generated via the Post Process, or user-specified via the Annual Summary (RS)
Transaction or AQS Maintain Annual Summary (L7).
4.191.3 Attributes
Type: Number
Length: 5.5
Required: Yes
4.191.4 Uses
Summary Percentiles
In forms and reports there are 8 instances of this field with values based on the
Percentile.
Site Annual Summaries (98th Percentile)
4.191.5 Value Assignment
4.191.5.1 Ozone 1-Hour & 8-Hour
The 1-hour or 8-hour Maximum Value (Daily) where there are k Maximum Value (Daily)
values less than or equal to it, where k is the calculated rank for the Percentile. The formula
for determining the rank is:
k = percentile rank
p = Percentile,
v = Count of Valid Days.
Note: A CEILING function returns the smallest integer higher than, or equal to, the given
where:
number.
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4.191.5.2 Daily Non-Seasonal PM2.5
The sample value where there are k values less than or equal to it, where & is the calculated
rank for the percentile. The formula for determining the rank is:
Where:
k = Percentile rank
n = Count of creditable samples for the year
p = Percentile
Note: A CEILING function returns the smallest integer higher than, or equal to, the given
number.
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4.191.5.3 Daily Seasonal PM2.5
The minimum sample value that makes:
^(x)xlOO > p
where:
x^/M)
where:
dh= number of calendar days in the high season,
di = number of calendar days in the low season,
p = Percentile,
x = the measured concentration, and
KM =
where:
a = high or low,
la = number of samples in season a that are <= x,
na = number of samples in season a.
The high season are those months where the monthly required frequency is that with
minimum daily interval for the year; the low season is all others months.
(Reference: EPA-454/R-99-008 Guideline on Data Handling Conventions for the PM
NAAQS)
4.191.5.4 Site-Level Annual PM2.5 98th Percentile
The Annual 98th percentile is computed based on seasonal and non-seasonal PM2.5 using all
daily summaries for the year
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4.191.5.5 Hourly and Non-PM2.5 Daily
The sample value where there are k sample values less than or equal to it, where k is the
calculated rank for the percentile. The formula for calculating the rank is:
k = percentile rank
p = Percentile,
n = Count of Observations (Annual).
Note: A CEILING function returns the smallest integer higher than, or equal to, the given
number.
4.191.5.6 Non-Ozone National Ambient Air Quality Standards (NAAQS)
The valid 8-hour average where there are k valid 8-hour averages less than or equal to it,
where k is the calculated rank for the percentile. The formula for calculating the rank is:
k = percentile rank
p = Percentile,
n = Count of Observations (Annual).
Note: A CEILING function returns the smallest integer higher than, or equal to, the given
number.
where:
where:
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4.192 POC
4.192.1 Description
Pollutant Occurrence Code. An identifier used to distinguish between multiple monitors at
the same site that are measuring the same parameter. For example, the first monitor
established to measure carbon monoxide (CO) at a site could have a POC of 1. If an
additional monitor were established at the same site to measure CO, that monitor could have a
POC of 2. However, if a new instrument were installed to replace the original instrument
used as the first monitor, that would be the same monitor and it would still have a POC of 1.
For criteria pollutants, data from different sampling methods should only be stored under the
same POC if the sampling intervals are the same and the methods are reference or equivalent.
For sites where duplicate sampling is being conducted by multiple agencies or by one agency
with multiple samplers, multiple POCs must be utilized to store all samples.
For non-criteria pollutants, data from multiple sampling methods can be stored under the
same POC if the sampling intervals are the same and there is only one sample for the time
reported. If multiple open path monitors are reporting data for the same parameter, each open
path would be assigned a different POC.
4.192.2 Source
User-specified via the Basic Monitor Information (MA) Transaction, or the Maintain Monitor
form.
4.192.3 Attributes
Type: Number
Length: 2.0
Required: Yes
4.192.4 Uses
Monitors
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4.193 Pollutant Area Code
4.193.1 Description
Designation of a pollutant area to which the monitor is assigned. Pollutant areas are
geographic areas defined by a program office in which a certain pollutant should be closely
watched. Most are problem or non-attainment areas, but attainment areas requiring special
attention may also be defined. Types of pollutant areas are: status areas, monitoring areas,
and monitor planning areas.
4.193.2 Source
User-specified, via the Monitor Basic (MA) Transaction, or Maintain Monitor (L2).
4.193.3 Attributes
Type: Character
Length: 5
Required: Yes
4.193.4 Uses
Monitor Pollutant Areas. There are 5 pollutant areas that can be defined for a monitor.
4.193.5 Value Assignment
The value must exist on the Pollutant Areas view, and the corresponding type must be valid
for the Parameter.
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4.194 Pollutant Area Type
4.194.1 Description
Types of pollutant areas, such as status area, monitoring area, monitor-planning area.
4.194.2 Source
System-generated, via the Monitor Basic (MA) Transaction (), or Maintain Monitor (L2).
4.194.3 Attributes
Type: Character
Length: 40
Required: Yes
4.194.4 Uses
Monitor Pollutant Areas
4.194.5 Value Assignment
The value must exist on the Pollutant Area Types view.
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4.195 Precision Class
4.195.1 Description
Description of the class of precision check taken at the monitor.
4.195.2 Source
System-generated, via the Precision Data (RP) Transaction (), or Maintain Precision Data
(L61).
4.195.3 Attributes
Type: Character
Length: 20
Required: Yes
4.195.4 Uses
Precision Data
Monitor Precision Summaries
Precision Summary Protocols
Reporting Organization Precision Summaries
4.195.5 Value Assignment
4.195.5.1 Precision Data
If the method is automated (continuous), and the unit is not a flow unit, and the reported
duration is not 24-hour block average, then the class is "Analytical". This class will generally
include gaseous criteria pollutants, such as ozone (03), carbon monoxide (CO), sulfur dioxide
(S02), and nitrogen dioxide (N02), that were recorded using automated methods.
If the method is either automated or manual (intermittent), and the unit is a flow unit,
then the class is "Flow". This category will generally include particulate criteria pollutants,
such as lead (Pb), PM2.5 and PM10, that were recorded using automated methods.
If the method is manual and the unit is not a flow unit, or the method is automated, the
unit is not a flow unit, and the duration is a 24-hour block average, then the class is
"Collocated". This category will include particulate criteria pollutants such as PM2.5 (both
manual and automated) and PM10 (manual only).
4.195.5.2 Monitor & Reporting Organization Precision Summaries
The Precision Class specified for the precision checks that are being aggregated in the
summary.
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4.196 Precision Date
4.196.1 Description
The calendar date for which the precision check is being reported.
4.196.2 Source
User-specified, via the Precision Data (RP) Transaction (), or Maintain Precision Data (L61).
4.196.3 Attributes
Type: Date
Length: Not Applicable
Required: Yes
4.196.4 Uses
Precision Data
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4.197 Precision ID
4.197.1 Description
A sequentially assigned number used to identify a particular precision check from others,
when multiple checks are performed on the same day.
4.197.2 Source
User-specified, via the Precision Data (RP) Transaction (), or Maintain Precision Data (L61).
4.197.3 Attributes
Type: Number
Length: 2.0
Required: Yes
4.197.4 Uses
Precision Data
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4.198 Precision Sample ID
4.198.1 Description
The unique identity (ID) number of the reference sample used to challenge the instrument.
4.198.2 Source
User-specified, via the Precision Data (RP) Transaction (), or Maintain Precision Data (L61).
4.198.3 Attributes
Type: Character
Length: 10
Required: No
4.198.4 Uses
Precision Data
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4.199 Precision Scale
4.199.1 Description
Indicates the number of places to the right of the decimal point provided by the data owner at
submission, including trailing zeros. If the Actual Value and Indicated Value have differing
scales, then the larger of the two is used.
4.199.2 Source
System-generated, via the Precision Data (RP) Transaction (), or Maintain Precision Data
(L61).
4.199.3 Attributes
Type: Number
Length: 1.0
Required: Yes
4.199.4 Uses
Precision Data
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4.200 Primary Monitor Begin Date
4.200.1 Description
The date on which the primary monitor period begins.
4.200.2 Source
User-specified via the Maintain Site form.
4.200.3 Attributes
Type: Date
Length: Not Applicable
Required: Yes
4.200.4 Uses
Primary Monitor Period
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4.201 Primary Monitor End Date
4.201.1 Description
The date on which the primary monitor period ends.
4.201.2 Source
User-specified via the Maintain Site form.
4.201.3 Attributes
Type: Date
Length: Not Applicable
Required: Yes
4.201.4 Uses
Primary Monitor Period
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4.202 Primary POC
4.202.1 Description
The POC for the monitor assigned as the primary monitor for a site.
4.202.2 Source
User-specified via the Maintain Site form.
4.202.3 Attributes
Type: Number
Length: 2.0
Required: Yes
4.202.4 Uses
Primary Monitor Periods
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4.203 Primary Qualifier Code
4.203.1 Description
The primary qualifier for a raw, composite, or blank sample.
4.203.2 Source
User-specified or system-generated, via the Raw Data (RD), Composite Data (RC), or Blank
Data (RB) Transactions, or AQS Maintain Raw Data (L54), Maintain Composite Data (L51),
or Maintain Blank Data (L53).
4.203.3 Attributes
Type: Character
Length: 8
Required: No
4.203.4 Uses
Raw Data
Composite Data
Blank Data
4.203.5 Value Assignment
If the user specifies a Null Data code, that value is always assigned, else, it is replicated from
the corresponding Qualifier Details (Raw, Composite, or Blank) for the record, according to
the following hierarchy:
1. Exceptional Event codes,
2. Natural Event codes,
3. The code for "Validated Value",
4. Any other qualifier code.
Note: Null Data codes are not valid for Composite Data.
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4.204 Primary Qualifier Type
4.204.1 Description
The qualifier type of the Primary Qualifier Code.
4.204.2 Source
User-specified or system-generated, via the Raw Data (RD), Composite Data (RC), or Blank
Data (RB) Transactions, or AQS Maintain Raw Data (L54), Maintain Composite Data (L51),
or Maintain Blank Data (L53).
4.204.3 Attributes
Type: Character
Length: 8
Required: No
4.204.4 Uses
Raw Data
Composite Data
Blank Data
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4.205 Primary Sampler Indicator
4.205.1 Description
Indicates whether the monitor is the primary or duplicate monitor in a collocated monitor pair.
4.205.2 Source
User-specified, via the Monitor Collocation Period (MJ) Transaction (), or Maintain Monitor
(L2).
4.205.3 Attributes
Type: Character
Length: 1
Required: Yes
4.205.4 Uses
Monitor Collocation Periods
4.205.5 Value Assignment
The value must be "Y", which indicates the monitor is the primary sampler, or "N", which
indicates that it is the duplicate sampler.
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4.206 Primary Sampler Monitor ID
4.206.1 Description
The monitor ID of the duplicate sampler's primary sampler in the collocated pair.
4.206.2 Source
System-generated, via the Monitor Collocation Period (MJ) Transaction (), or Maintain
Monitor (L2).
4.206.3 Attributes
Type: Character
Length: 20
Required: No
4.206.4 Uses
Monitor Collocation Periods
4.206.5 Value Assignment
Must be valued when Primary Sampler Indicator is "N"; may not be valued when it is "Y".
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4.207 Probe Height
4.207.1 Description
The height of the sampling probe from the ground in meters.
4.207.2 Source
User-specified via the Basic Monitor Information (MA) Transaction, or the Maintain Monitor
form.
4.207.3 Attributes
Type: Number
Length: 8.2
Required: No
4.207.4 Uses
Monitors
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4.208 Probe Horizontal Distance
4.208.1 Description
The horizontal distance, in meters, of the probe from its supports.
4.208.2 Source
User-specified via the Basic Monitor Information (MA) Transaction, or the Maintain Monitor
form.
4.208.3 Attributes
Type: Number
Length: 8.2
Required: No
4.208.4 Uses
Monitors
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4.209 Probe Location
4.209.1 Description
The location of the sampling probe.
4.209.2 Source
User-specified via the Basic Monitor Information (MA) Transaction, or the Maintain Monitor
form.
4.209.3 Attributes
Type: Character
Length: 20
Required: No
4.209.4 Uses
Monitors
4.209.5 Value Assignment
The value must exist on the Probe Locations view.
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4.210 Probe Obstruction Height
4.210.1 Description
The height, in meters, of the top of the obstruction above the probe.
4.210.2 Source
User-specified via the Monitor Obstruction Information (MH) Transaction, or the Maintain
Monitor form.
4.210.3 Attributes
Type: Number
Length: 8.2
Required: Yes
4.210.4 Uses
Probe Obstructions
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4.211 Probe Obstruction Type
4.211.1 Description
The type of obstruction responsible for the restricted airflow of a monitor.
4.211.2 Source
User-specified via the Monitor Obstruction Information (MH) Transaction, or the Maintain
Monitor form.
4.211.3 Attributes
Type: Character
Length: 20
Required: Yes
4.211.4 Uses
Probe Obstructions
4.211.5 Value Assignment
The value must exist on the Probe Obstruction Types view
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4.212 Probe Vertical Distance
4.212.1 Description
The vertical distance, in meters, of the probe from its supports.
4.212.2 Source
User-specified via the Basic Monitor Information (MA) Transaction, or the Maintain Monitor
form.
4.212.3 Attributes
Type: Number
Length: 8.2
Required: No
4.212.4 Uses
Monitors
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4.213 Project Class
4.213.1 Description
The code for the type of sampling performed by the monitor.
4.213.2 Source
User-specified via the Basic Monitor Information (MA) Transaction, or the Maintain Monitor
form.
4.213.3 Attributes
Type: Character
Length: 8
Required: No
4.213.4 Uses
Monitors
4.213.5 Value Assignment
The value must exist on the Project Types view.
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4.214 Qualifier Code
4.214.1 Description
Qualifications used to describe the sample data point. They may document exceptional data
events that are natural or anthropogenic, or quality assurance exceptions.
4.214.2 Source
User-specified, via the Raw Data (RD), Blank Data (RB), or Composite Data (RC)
Transactions, or AQS Maintain Raw Data (L54), Maintain Blank Data (L53), or Maintain
Composite Data (L51).
4.214.3 Attributes
Type: Character
Length: 8
Required: Yes
4.214.4 Uses
Raw Qualifier Details
Composite Qualifier Details
Blank Qualifier Details
Data records can contain up to 10 qualifier codes
4.214.5 Value Assignment
The value must exist on the Qualifiers view.
The value must be a type allowed for the pollutant parameter.
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4.215 Quarter Represented
4.215.1 Description
The quarter represented by the audit. For a particular audit, indicates the actual dates
(Quarter) in which the sample was collected.
4.215.2 Source
User-specified or system-generated, via the Accuracy Data (RA) Transaction, or Maintain
Accuracy Data (L62).
4.215.3 Attributes
Type: Number
Length: 1.0
Required: Yes
4.215.4 Uses
Accuracy Data
4.215.5 Value Assignment
4.215.5.1 Lead
User-specified, via the Accuracy Data (RA) Transaction, or AQS Maintain Accuracy Data
(L62). Value is either the year of or the year prior to the Accuracy Date.
4.215.5.2 Default
Derived from the record's Accuracy Date value.
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4.216 Recording Mode
4.216.1 Description
A term that describes how the methods recorded the source samples.
4.216.2 Source
System-generated, via the Accuracy Data (RA) or Precision Data (RP) Transactions, or AQS
Maintain Precision Data (L61) or Maintain Accuracy Data (L62).
4.216.3 Attributes
Type: Character
Length: 30
Required: Yes
4.216.4 Uses
Monitor Precision Summaries
Reporting Organization Precision Summaries
Monitor Accuracy Summaries
Accuracy Summary Protocols
Reporting Organization Accuracy Summaries
4.216.5 Value Assignment
The possible values are: CONTINUOUS (i.e., Automated), and INTERMITTENT (i.e.,
Manual). The value is derived from the applicable methodology records.
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4.217 Reference Point
4.217.1 Description
A term that describes the place for which locational coordinates were determined.
This data element is required by EPA Locational Data Policy. More information regarding
EPA=s data standards and policies may be found on EPA's Environmental Data Registry
(EDR) Website (http://www.epa.gov/edr/).
4.217.2 Source
System-generated via the Basic Site Information (AA) Transaction, or The Maintain Site
form..
4.217.3 Attributes
Type: Character
Length: 50
Required: Yes
4.217.4 Uses
Sites
4.217.5 Value Assignment
Always "MONITORING POINT".
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4.218 Regulation Code
4.218.1 Description
A code that represents an EPA regulation for which compliance documentation is required.
4.218.2 Source
User-specified via the Monitor Regulation Compliance (MI) Transaction, or the Maintain
Monitor form.
4.218.3 Attributes
Type: Character
Length: 8
Required: Yes
4.218.4 Uses
Monitor Regulatory Compliances
4.218.5 Value Assignment
Code
Description
RM
Reference Method Used
SC
Siting Criteria Met
QC
Quality Assurance Criteria Met
FC
First PM10 Exceedance Correction
ST
Short Term Satisfied
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4.219 Reported Sample Value
4.219.1 Description
The value of an observation being reported.
4.219.2 Source
User-specified via the Raw Data (RD) or Composite Data (RC) Transactions, AQS Maintain
Raw Data (L54), or AQS Maintain Composite Data (L51).
4.219.3 Attributes
Type: Number
Length: 5.5
Required: No
4.219.4 Uses
Raw Data
Composite Data
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4.220 Reported Scale
4.220.1 Description
Indicates the number of places to the right of the decimal point provided by the data owner at
submission, including trailing zeros.
4.220.2 Source
System-generated via the Raw Data (RD) or Composite Data (RC) Transactions, AQS
Maintain Raw Data (L54), or AQS Maintain Composite Data (L51).
4.220.3 Attributes
Type: Number
Length: 1.0
Required: No
4.220.4 Uses
Raw Data
Composite Data
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4.221 Reported Unit
4.221.1 Description
The dimensional system in which a pollutant concentration or parameter reading is expressed.
4.221.2 Source
User-specified via the Monitor Protocol (MK), Raw Data (RD), or Composite Data (RC)
Transactions, or the Maintain Monitor form.
4.221.3 Attributes
Type: Character
Length: 3
Required: Yes
4.221.4 Uses
Monitor Protocols
4.221.5 Value Assignment
The value must exist on the Units view
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4.222 Reporting Organization
4.222.1 Description
A code identifying the agency that generated the source precision or accuracy data for the
summary.
4.222.2 Source
System-generated, via the Accuracy Data (RA) or Precision Data (RP) Transactions, or AQS
Maintain Precision Data (L61) or Maintain Accuracy Data (L62).
4.222.3 Attributes
Type: Character
Length: 8
Required: Yes
4.222.4 Uses
Monitor Precision Summaries
Precision Summary Protocols
Reporting Organization Precision Summaries
Monitor Accuracy Summaries
Accuracy Summary Protocols
Reporting Organization Accuracy Summaries
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4.223 Required Collection Frequency Begin Date
4.223.1 Description
The date on which the Required Collection Frequency (RCF) went into effect.
4.223.2 Source
User-specified via the Monitor Sampling Schedule (MF) Transaction, or the Maintain
Monitor form.
4.223.3 Attributes
Type: Date
Length: Not Applicable
Required: Yes
4.223.4 Uses
Required Collection Frequencies
Sample Schedules
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4.224 Required Collection Frequency Code
4.224.1 Description
The Required Collection Frequency (RCF), required by either Photochemical Assessment
Monitoring System (PAMS) regulations for organic compounds: PM-2.5 or PM-10 monitors.
4.224.2 Source
User-specified via the Monitor Sampling Schedule (MF) Transaction, or the Maintain
Monitor form.
4.224.3 Attributes
Type: Character
Length: 8
Required: Yes
4.224.4 Uses
Required Collection Frequencies
4.224.5 Value Assignment
The value must exist on the Collection Frequencies view.
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4.225 Required Collection Frequency End Date
4.225.1 Description
The date on which the Required Collection Frequency (RCF) ended.
4.225.2 Source
User-specified via the Monitor Sampling Schedule (MF) Transaction, or the Maintain
Monitor form.
4.225.3 Attributes
Type: Date
Length: Not Applicable
Required: No
4.225.4 Uses
Required Collection Frequencies
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4.226 Road Type
4.226.1 Description
The type of road or street being described.
4.226.2 Source
User-specified via the Site Street Information (AB) Transaction, or The Maintain Site form..
4.226.3 Attributes
Type: Character
Length: 20
Required: Yes
4.226.4 Uses
Tangent Roads
4.226.5 Value Assignment
The value must exist on the Road Types view
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4.227 Sample Date
4.227.1 Description
The calendar date on which the sample data was recorded.
4.227.2 Source
User-specified via the Raw Data (RD) Transaction, or AQS Maintain Raw Data (L51).
4.227.3 Attributes
Type: Date
Length: 8
Required: Yes
4.227.4 Uses
Forms and Reports
4.227.5 Value Assignment
On input: Coupled with Sample Time to set Sample Date/Time
On output: Extracted from Sample Date/Time
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4.228 Sample Date/Time
4.228.1 Description
The date and time for which the observation is being reported.
4.228.2 Source
User-specified via the Raw Data (RD) Transaction, or AQS Maintain Raw Data (L54).
4.228.3 Attributes
Type: Date
Length: Not Applicable
Required: Yes
4.228.4 Uses
Raw Data
Raw Qualifier Details
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4.229 Sample Residence Time
4.229.1 Description
The time in seconds for the sample to move from the probe inlet to the monitor.
4.229.2 Source
User-specified via the Basic Monitor Information (MA) Transaction, or the Maintain Monitor
form.
4.229.3 Attributes
Type: Number
Length: 8.2
Required: No
4.229.4 Uses
Monitors
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4.230 Sample Schedule Month
4.230.1 Description
The month number for which a Monthly Required Collection Frequency applies.
4.230.2 Source
System-generated via the Monitor Sampling Schedule (MF) Transaction, or the Maintain
Monitor form.
4.230.3 Attributes
Type: Number
Length: 2.0
Required: Yes
4.230.4 Uses
Sample Schedules
4.230.5 Value Assignment
Number
Month
1
January
2
February
3
March
4
April
5
May
6
June
7
July
8 August
9
September
10
October
11
November
12
December
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4.231 Sample Time
4.231.1 Description
The 24-hour clock time at which the sampling for the reported observation began, in standard
time at the location of the monitoring site.
4.231.2 Source
User-specified via the Raw Data (RD) Transaction, or AQS Maintain Raw Data (L51).
4.231.3 Attributes
Type: Date
Length: 5
Required: Yes
4.231.4 Uses
Forms and Reports
4.231.5 Value Assignment
On input: Coupled with Sample Date to set Sample Date/Time
On output: Extracted from Sample Date/Time
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4.232 Schedule Exemption Indicator
4.232.1 Description
Indicates whether the sampling schedule differs from that required by the standard, by
approval of the Regional Administrator.
4.232.2 Source
User-specified via the Basic Monitor Information (MA) Transaction, or the Maintain Monitor
form.
4.232.3 Attributes
Type: Character
Length: 1
Required: No
4.232.4 Uses
Monitor Pollutant Areas
4.232.5 Value Assignment
4.232.5.1 Monitor Planning Areas
The field may be "Y" and "N" for Monitor Planning Areas.
4.232.5.2 Default
Not valued.
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4.233 Screening Group Number
4.233.1 Description
The number for the screening group that created the monitor, i.e., its owner.
4.233.2 Source
System-generated via the Basic Monitor Information (MA) Transaction, or the Maintain
Monitor form.
4.233.3 Attributes
Type: Number
Length: 12.0
Required: Yes
4.233.4 Uses
Monitors
4.233.5 Value Assignment
The value must exist on the Screening Groups view.
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4.234 Sequence Number
4.234.1 Description
The sequential identification number used to distinguish Comment Texts for a specific
monitor, site, or qualifier detail.
4.234.2 Source
User-specified via the Maintain Site form, Maintain Monitor (L2), Maintain Raw Data (L54),
or Maintain Composite Data (L51).
4.234.3 Attributes
Type: Number
Length: 12.0
Required: Yes
4.234.4 Uses
Comments
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4.235 Session Date
4.235.1 Description
The date and time of the AQS session under which the sample point was submitted.
4.235.2 Source
System-generated via Raw Data (RD) or Composite Data (RC) Transactions, or AQS
Maintain Raw Data (L54) or Maintain Composite Data (L51).
4.235.3 Attributes
Type: Date
Length: Not Applicable
Required: No
4.235.4 Uses
Raw Data
Composite Data
4.235.5 Value Assignment
4.235.5.1 Pre-Production Status
May be valued when the Status Indicator is "R" or "S".
4.235.5.2 Production Status
May not be valued when the Status Indicator is "P".
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4.236 Session Screening Group
4.236.1 Description
The number of the AQS session screening group under which the sample point was submitted.
4.236.2 Source
System-generated via Raw Data (RD) or Composite Data (RC) Transactions, or AQS
Maintain Raw Data (L54) or Maintain Composite Data (L51).
4.236.3 Attributes
Type: Number
Length: 12.0
Required: No
4.236.4 Uses
Raw Data
Composite Data
Monitor Protocols
4.236.5 Value Assignment
4.236.5.1 Pre-Production Status
May be valued when the Status Indicator is "R" or "S". The value must exist on the
Screening Groups view.
4.236.5.2 Production Status
May not be valued when the Status Indicator is "P".
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4.237 Session User ID
4.237.1 Description
The user of the AQS session under which the sample point was submitted.
4.237.2 Source
System-generated via Raw Data (RD) or Composite Data (RC) Transactions, or AQS
Maintain Raw Data (L54) or Maintain Composite Data (L51).
4.237.3 Attributes
Type: Character
Length: 40
Required: No
4.237.4 Uses
Raw Data
Composite Data
Monitor Protocols
4.237.5 Value Assignment
4.237.5.1 Pre-Production Status
May be valued when the Status Indicator is "R" or "S". The value must exist on the Airs
User Profiles view.
4.237.5.2 Production Status
May not be valued when the Status Indicator is "P".
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4.238 Site ID
4.238.1 Description
A numeric identifier (ID) that uniquely identifies each air monitoring site within a county, and
if it is a tribal site, within all counties included in a tribal area. There is no requirement that
Site IDs be assigned continuously or in any particular order. Regional or local organizations
are thus free to allocate Site IDs in any way they choose, as long as there is no duplication
within a county or the counties that include a common tribal area.
A specific Site ID is associated with a specific physical location and address. Any change in
address requires a new Site ID to be assigned. This address change could include a change
from the roof of one building to another. A change in location on the same roof should not
normally require a new Site ID. Although an address change would routinely mean a new Site
ID, some changes that do not change the site's location in respect to surrounding sources and
its measurement scale would require no change. An EPA regional office should be consulted
for assistance in determining whether a new site ID is required.
If a new Site ID is needed for a site not operated by the air pollution control agency, that
agency should be contacted to assist in the ID assignment, to ensure that the ID is unique
within the county and, if appropriate, the ajoining counties sharing a common tribal area. In
other words, when a new Site ID is assigned, it must be different from any other Site ID
already existing for that combination of State Code and County Code and Tribal Area.
4.238.2 Source
User-specified via the Basic Site Information (AA) Transaction, or The Maintain Site form..
4.238.3 Attributes
Type: Character
Length: 4
Required: Yes
4.238.4 Uses
Sites
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4.239 Source Indicator
4.239.1 Description
Identifies the source (primary or collocated) of the site daily value.
4.239.2 Source
System-generated via the Post process or when updating Primary Monitor Periods from the
application.
4.239.3 Attributes
Type: Character
Length: 1
Required: No
4.239.4 Uses
Site Daily Values
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4.240 Source of Traffic Count
4.240.1 Description
The method by which the traffic volume/flow count was obtained.
4.240.2 Source
User-specified via the Site Street Information (AB) Transaction, or The Maintain Site form..
4.240.3 Attributes
Type: Character
Length: 50
Required: No
4.240.4 Uses
Tangent Roads
4.240.5 Value Assignment
The value must exist on the Traffic Volume Sources view.
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4.241 Source Scale
4.241.1 Description
Identifies the ratio of the map or cartographic product to the true location. The data element
for scale should be the X value of the 1 :X ratio (e.g., if the scale is 1:24,000, the value of the
scale data element should be 24,000). The United States Geological Survey 1:24,000 is
usually the smallest reasonable scale for locating sub-facility points, such as stacks or pipes.
The relative accuracies of maps as a locational tool decreases as the X value increases. This
field is required when the Horizontal Collection Method is not based on GPS but upon use of
a map and photos. EPA Locational Data Policy requires this data element for maps and
photos. More information regarding EPA's data standards and policies may be found on
EPA's Environmental Data Registry (EDR) Website (http://www.epa.gov/edr/)..
4.241.2 Source
User-specified via the Basic Site Information (AA) Transaction, or The Maintain Site form.
4.241.3 Attributes
Type: Number
Length: 12.0
Required: Conditionally It is required when a site's coordinates are derived from a
map or photo, but not for GPS methods.
4.241.4 Uses
4.241.5 Value Assignment
This field is required when the Horizontal Collection Method is based upon a map or a photo.
Sites
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4.242 Spatial Average Indicator
4.242.1 Description
Indicates whether spatial averaging is to be performed for the all-individual annual weighted
means for sites that are flagged and in the same community-monitoring zone.
4.242.2 Source
User-specified via the Basic Monitor Information (MA) Transaction, or the Maintain Monitor
form.
4.242.3 Attributes
Type: Character
Length: 1
Required: No
4.242.4 Uses
Monitor Pollutant Areas
4.242.5 Value Assignment
4.242.5.1 Monitor Pollutant Areas
The field may be "Y" and "N" for Monitor Planning Areas.
4.242.5.2 Default
Not valued.
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4.243 Standard Deviation (Monitor Precision Summary)
4.243.1 Description
The measure of the dispersion about the central tendency of a pollutant that is the square root
of the precision mean of the squares of the variation of each Relative Percent Differences of a
value pair from the precision mean of the Relative Percent Differences of the value pairs for
the time period.
4.243.2 Source
System-generated, via the Precision Data (RP) Transaction, or AQS Maintain Precision Data
(L61).
4.243.3 Attributes
Type: Number
Length: 6.4
Required: Yes
4.243.4 Uses
Monitor Precision Summaries
4.243.5 Value Assignment
4.243.5.1 Analytical & Flow
S = standard deviation,
di = Percent Difference of a analytical or flow precision check,
n = number of gaseous or flow checks (i.e., Count of Precision Checks (Monitor
Precision Summary)),
and n > 1.
If n = 1, then the standard deviation is assigned to be 0.
4.243.5.2 Collocated (PM2.5)
Standard deviation is not computed for collocated PM2.5.
where:
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4.243.5.3 Collocated (Other)
S =
f (
n \ 2)
n
*
v v
Yjdi2 -\Yjdi
i=i /
/Ś=1 / /
(n*(n- 1))
where:
S = standard deviation,
di = Percent Difference of a valid collocated pair,
n = Count of Valid Collocated Data Pairs (Monitor Precision Summary),
and n > 1.
If n = 1, then the standard deviation is assigned to be 0.
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4.244 Standard Deviation (Reporting Organization Accuracy
Summary)
4.244.1 Description
The measure of the dispersion about the central tendency of a pollutant that is the square root
of the precision mean of the squares of the variation of each Relative Percent Differences of a
value pair from the precision mean of the Relative Percent Differences of the value pairs for
the time period.
4.244.2 Source
System-generated, via the Accuracy Data (RA) Transaction, or Maintain Accuracy Data
(L62).
4.244.3 Attributes
Type: Number
Length: 7.5
Required: No
4.244.4 Uses
Reporting Organization Accuracy Summaries
4.244.5 Value Assignment
S = standard deviation,
di = Percent Difference of a analytical or flow audit,
n = Count of Accuracy Audits (Reporting Organization Accuracy Summary).
If either quarter in either half of the year has an Count of Accuracy Audits (Reporting
Organization Accuracy Summary) of 1, then the source data for both quarters in that half will
be merged for purposes of calculating the standard deviation, and reported with the second
quarter of the half (i.e., Q2 or Q4). In this case, there will be no value for the corresponding
first quarter in the half (i.e., Q1 or Q3)
where:
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4.245 Standard Deviation (Reporting Organization Precision
Summary)
4.245.1 Description
The measure of the dispersion about the central tendency of a pollutant that is the square root
of the precision mean of the squares of the variation of each Relative Percent Differences of a
value pair from the precision mean of the Relative Percent Differences of the value pairs for
the time period.
4.245.2 Source
System-generated via the Precision Data (RP) Transaction, or AQS Maintain Precision Data
4.245.3 Attributes
Type: Number
Length: 6.4
Required: No
4.245.4 Uses
Reporting Organization Precision Summaries
4.245.5 Value Assignment
4.245.5.1 Analytical & Flow
S = standard deviation,
di = Percent Difference of a analytical or flow precision check,
n = number of gaseous or flow checks (i.e., Count of Precision Checks (Reporting
Organization Precision Summary)),
k = number of monitors (i.e. Count of Analyzers).
and n> k.
\Łn = k, then the standard deviation is assigned to be 0.
4.245.5.2 Collocated (PM2.5)
Standard deviation is not computed for collocated PM2.5.
(L61).
where:
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4.245.5.3 Collocated (Other)
S =
1
( (
\
V v
2
1 J
S di
i=i J J
(n*(n- k))
where:
S = standard deviation,
di = Percent Difference of a valid collocated pair,
n = Count of Valid Collocated Data Pairs (Reporting Organization Precision Summary),
k = number of collocated sites (i.e. Count of Collocated Sites).
and n> k.
\Łn = k, then the standard deviation is assigned to be 0.
4.245.5.4 Federal Reference Method (FRM) Audit
s=
1
((
\
v v
2
= 1 J
^ 2^
X di
i=i J J
(n*{n- 1))
where:
S = standard deviation,
di = Percent Difference of an FRM audit pair (2.1.3 Percent Difference).
n = number of FRM audits (i.e., Count of Precision Checks (Reporting Organization
Precision Summary)),
and n > 1.
If n = 1, then the standard deviation is assigned to be 0.
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4.246 Standard Horizontal Datum
4.246.1 Description
It has been decided to compute a "standard" location representation for all site
location/coordinates, so that data from AQS can be more easily used for mapping and
geospatial analysis. This is accomplished by the EPA master geospatial database
(Envirofacts), which converts the user-provided coordinates into Latitude and Longitude with
the standard horizontal datum. The datum, WGS84 has been selected for this purpose, (i.e.
This field will always be WGS84.)
4.246.2 Source
System derived.
4.246.3 Attributes
Type: Character
Length: 120
Required: Yes
4.246.4 Uses
Sites
4.246.5 Value Assignment
Always assigned the value WGS84.
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4.247 Standard Latitude
4.247.1 Description
It has been decided to compute a "standard" location representation for all site
location/coordinates, so that data from AQS can be more easily used for mapping and
geospatial analysis. This is accomplished by converting the user-provided coordinates into
Latitude and Longitude with the standard horizontal datum, WGS84.
4.247.2 Source
Derived from the EPA master geospatial database (Envirofacts) by using the user provided
Latitude and Longitude or (UTM) coordinates, on the Basic Site Information (AA)
Transaction, or AQS Maintain Site form.
4.247.3 Attributes
Type: Number
Length: 2.6
Required: Yes
4.247.4 Uses
Sites
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4.248 Standard Longitude
4.248.1 Description
. It has been decided to compute a "standard" location representation for all site
location/coordinates, so that data from AQS can be more easily used for mapping and
geospatial analysis. This is accomplished by converting the user-provided coordinates into
Latitude and Longitude with the standard horizontal datum, WGS84.
4.248.2 Source
Derived from the EPA master geospatial database (Envirofacts) by using the user provided
Latitude and Longitude or (UTM) coordinates, on the Basic Site Information (AA)
Transaction, or AQS Maintain Site form.
4.248.3 Attributes
Type: Number
Length: 3.6
Required: Yes
4.248.4 Uses
Sites
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4.249 Standard Sample Value
4.249.1 Description
The Reported Sample Value converted to a value in the Standard Unit for the Parameter.
4.249.2 Source
System-generated via the Raw Data (RD) or Composite Data (RC) Transactions, AQS
Maintain Raw Data (L54), or AQS Maintain Composite Data (L51).
4.249.3 Attributes
Type: Number
Length: 5.5
Required: No
4.249.4 Uses
Raw Data
Composite Data
4.249.5 Value Assignment
Each Reported Unit-Standard Unit combination has a record in the Unit Conversions view.
That record specifies the values to be used in the following formula:
v = the value in standard units (Standard Sample Value),
s = the scalar factor,
/ = the linear factor,
r = the sample value in reported units (Reported Sample Value),
m = the molecular weight of the Parameter,
i = indication of whether molecular weight applies, (0 means "No", 1 means "Yes"),
c = the carbon count of the Parameter,
j = indication of whether carbon count applies, (0 means "No", 1 means "Yes").
When the calculated Standard Sample Value is less than the applicable method detectable
limit (MDL) and the parameter is flagged for substitution for values below the applicable
MDL, then the calculated value is superseded by a value equal to V2 the applicable MDL.
When such a substitution occurs, the Half MDL Substitution Indicator is set to "Y".
For any sample, the applicable MDL generally is that which is assigned to the method by the
EPA. This EPA-assigned, i.e., federal, MDL, may be superseded by an alternative MDL.
An Alternate MDL is specified by the submitting agency as part of a raw data transaction.
This Alternate MDL is stored with the corresponding Monitor Protocol, and is converted to
v = s+ (I* r*fri* d)
where:
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the Standard Unit, using the above formula, for comparison to the corresponding Standard
Sample Value.
A Standard Sample Value that is either greater than, or equal to, the applicable MDL, or
below that applicable MDL but flagged for rescaling of V2 MDL substitutions, is subject to
rescaling. If the applicable MDL is the Federal MDL, or the applicable MDL is the Alternate
MDL and parameter is not flagged for V2 MDL substitution for values below the applicable
MDL, then the scaling factor is that scale which is assigned to the method by the EPA, (i.e.,
the summary scale). If the applicable MDL is an Alternate MDL and the parameter is
flagged for V2 MDL substitutions, then the scaling factor is the number of digits of that
Alternate MDL when it is converted to the Standard Unit. (Note: The maximum possible
scale is 5.) Rescaling is either rounding or truncation of the converted value to the number of
decimal places specified in the summary scale. Each parameter has a Conversion Indicator
field, which specifies whether truncation or rounding applies. (Rounding is the default.)
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4.250 Standard Scale
4.250.1 Description
Indicates the number of places to the right of the decimal point for the Standard Sample
Value, including trailing zeros.
4.250.2 Source
System-generated via the Raw Data (RD) or Composite Data (RC) Transactions, AQS
Maintain Raw Data (L54), or AQS Maintain Composite Data (L51).
4.250.3 Attributes
Type: Number
Length: 1.0
Required: No
4.250.4 Uses
Raw Data
Composite Data
4.250.5 Value Assignment
Replicated from the Summary Scale for the Parameter and Method Code on the Sampling
Methodologies view.
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4.251 Standard Unit
4.251.1 Description
The Standard Unit for the Parameter.
4.251.2 Source
System-generated via the Raw Data (RD) or Composite Data (RC) Transactions, AQS
Maintain Raw Data (L54), or AQS Maintain Composite Data (L51).
4.251.3 Attributes
Type: Character
Length: 3
Required: No
4.251.4 Uses
Raw Data
Composite Data
4.251.5 Value Assignment
Replicated from the Standard Unit for the Parameter on the Parameters view.
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4.252 State Code
4.252.1 Description
A Federal Information Processing Standards (FIPS) code that identifies one of the 50 states,
U. S. territories, Washington, DC, or foreign countries. For batch loading data formats only,
it may be set to "TT" to indicate that the County Code/Tribal Code field contains a Tribal
Code.
4.252.2 Source
User-specified via the batch Basic Site Information (AA) Transaction, or Maintain Site form.
If a user creates a tribal site via either of these two methods, then the State Code is derived
from the EPA master geospatial database (Envirofacts) by using the user-specified site
location (Latitude and Longitude).
4.252.3 Attributes
Type: Character
Length: 2
Required: Yes
4.252.4 Uses
Sites
4.252.5 Value Assignment
The value must exist on the States view.
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4.253 Status Indicator
4.253.1 Description
An indication of the status of the record.
4.253.2 Source
System-generated by AQS Load, Stat/CR, Post, Maintain Site (LI), Maintain Monitor (L2),
Maintain Raw Data (L54), and Maintain Composite Data (L51).
4.253.3 Attributes
Type: Character
Length: 1
Required: Yes
4.253.4 Uses
Sites
Tangent Roads
Open Paths
Monitors
Monitor Pollutant Areas
Sample Periods
Monitor Type Assignments
Monitor Agency Roles
Monitor Objectives
Required Collection Frequencies
Sample Schedules
Monitor Tangent Roads
Probe Obstructions
Monitor Regulatory Compliances
Monitor Collocation Periods
Monitor Protocols
Raw Data
Composite Data
4.253.5 Value Assignment
Indicator
Description
F
Validated to field-level
R
Relationally complete (Raw & Composite Data Only)
S
Statistically checked (Raw & Composite Data Only)
P
Production
I
Inactive (Raw & Composite Data Only)
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4.254 Street Address
4.254.1 Description
Specifies the building/street location of the monitoring site.
4.254.2 Source
User-specified via the Basic Site Information (AA) Transaction, or The Maintain Site form..
4.254.3 Attributes
Type: Character
Length: 240
Required: Yes
4.254.4 Uses
Sites
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4.255 Street Name
4.255.1 Description
The name of a street adjacent or near the monitoring site.
4.255.2 Source
User-specified via the Site Street Information (AB) Transaction, or The Maintain Site form..
4.255.3 Attributes
Type: Character
Length: 50
Required: Yes
4.255.4 Uses
Tangent Roads
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4.256 Substitute Design Value (Annual)
4.256.1 Description
The measure of a central tendency, computed if and only if the Substituted Annual Mean
exists for the present year or one of the prior two years, obtained from the sum of Substituted
Annual Mean (of appropriate exceptional data type) for any of the three years when present
and the Annual Mean when not present divided by 3.
4.256.2 Source
System-generated via the Post process.
4.256.3 Attributes
Type: Number
Required: No
4.256.4 Uses
Site Design Values
4.256.5 Value Assignment
4.256.5.1 Site-Level PM2.5
where:
u; = Site Substitute Annual Mean (if present, else Site-Level Annual Mean), of
appropriate exceptional data type
(Format: Rounded to one digit after decimal point)
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4.257 Substitute Mean (Annual)
4.257.1 Description
The measure of a central tendency, computed only if a quarterly substituted mean exists for
one of the quarters in the year, obtained from the sum of the quarterly substitute mean for
each quarter where present or quarterly arithmetic mean where not present (based on
appropriate exceptional data type), divided by the number of quarters present in the year.
4.257.2 Source
System-generated via the Post process.
4.257.3 Attributes
Type: Number
Required: No
i = quarter,
u; = Site-Level Quarterly Substitute Mean (if present, else Site-Level Quarterly Arithmetic
Mean), of appropriate exceptional data type
q = number of active quarters.
4.257.4 Uses
Site Annual Summaries
4.257.5 Value Assignment
4.257.5.1 Site-Level PM2.5
where:
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4.258 Substitute Mean (Quarterly)
4.258.1 Description
The measure of a central tendency, computed only if the actual sample days for a quarter are
less than 11, obtained from the sum of the site-level daily arithmetic means in the quarter
when present or the three year minimum site-level daily arithmetic mean in the corresponding
quarter when not present (based on appropriate exceptional data type), divided by 11.
4.258.2 Source
System-generated via the Post process.
4.258.3 Attributes
Type: Number
Required: No
4.258.4 Uses
Site Quarterly Summaries
4.258.5 Value Assignment
4.258.5.1 Site-Level PM2.5
Where:
DV = site-level daily arithmetic means in the quarter (on any day, not just scheduled days) of
appropriate exceptional data type
MD = 11 - the number of Actual Sample Days
Three Year Min = minimum site-level daily arithmetic mean in the corresponding calendar
quarter for the three year period.
(Format: No rounding or truncation)
(SUM(DV) + MDxThree _year _mir
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4.259 Summary Criteria Indicator (Annual)
4.259.1 Description
An indication of whether minimum summary criteria have been by the monitor for the year.
4.259.2 Source
System-generated via the Post process.
4.259.3 Attributes
Type: Character
Length: 3
Required: No
4.259.4 Uses
Annual Summaries
4.259.5 Value Assignment
The possible values are "Y" and "N".
4.259.5.1 8-Hour Ozone
Minimum summary criteria are met when the percentage derived from the following formula,
rounded to an integer, is greater than, or equal to, 75%:
p = percentage,
v = Count of Valid Days,
a = Count of Missing Days Assumed Less Than Standard,
r = Count of Required Days.
4.259.5.2 8-Hour Carbon Monoxide, 3-Hour and 24-Hour Sulfur Dioxide
Minimum summary criteria are met where the annual Count of Observations is greater than 0.
4.259.5.3 Default Hourly
Minimum summary criteria are met when the Percent of Observations (Annual) is greater
than, or equal to, 75%.
where:
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4.259.5.4 Default Daily & 24-Hour PM10 & PM2.5
For daily, 24-Hour PM10, 24-Hour PM2.5, weekly, monthly, composite weekly, and
composite monthly data, annual minimum summary criteria are met when each of the four
quarters in the year have met quarterly minimum summary criteria, i.e. the Summary Criteria
Indicator (Quarterly) values are "Y".
For quarterly, composite quarterly, and composite seasonal data, minimum summary criteria
are met when the Count of Observations (Annual) is greater than, or equal to, 3.
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4.260 Summary Criteria Indicator (Daily)
4.260.1 Description
An indication of whether minimum summary criteria have been by the monitor for the day.
4.260.2 Source
System-generated via the Post process.
4.260.3 Attributes
Type: Character
Length: 3
Required: No
4.260.4 Uses
Daily Summaries
4.260.5 Value Assignment
4.260.5.1 1-Hour Ozone
Minimum summary criteria are met when there were either at least nine samples from 9:01
AM Local Standard Time (LST) to 9:00 PM LST, (i.e., at least 75% of possible hourly
samples were measured), or at least one exceedance.
4.260.5.2 8-Hour Ozone
Minimum summary criteria are met where either of the following conditions exists:
there are at least 18 valid 8-hour averages (i.e., Count of Observations (Daily)) for
the 24-hour period,
the Maximum Value (Daily) is greater than the standard (i.e., Count of Primary
Exceedances (Daily) >= 1).
4.260.5.3 1-Hour PM10&PM2.5
Minimum summary criteria are met when the Percent of Observations (Daily) is greater than,
or equal to, 75%.
4.260.5.4 Default
Not valued.
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4.261 Summary Criteria Indicator (Quarterly)
4.261.1 Description
An indication of whether minimum summary criteria have been by the monitor for the
quarter.
4.261.2 Source
System-generated via the Post process.
4.261.3 Attributes
Type: Character
Length: 3
Required: No
4.261.4 Uses
Quarterly Summaries
4.261.5 Value Assignment
4.261.5.1 Daily & 24-Hour PM10 & PM2.5
Minimum summary criteria are met when the Percent of Observations (Quarterly) is greater
than, or equal to, 75%.
4.261.5.2 Default Hourly
Minimum summary criteria are met when the Percent of Observations (Quarterly) is greater
than, or equal to, 75%.
4.261.5.3 Default Daily
Minimum summary criteria are met for the quarter when the Count of Observations
(Quarterly) is greater than, or equal to, a duration-specific threshold. Those thresholds are:
Duration Threshold
Daily 12
Weekly; Composite Weekly 9
Monthly; Composite Monthly 2
Quarterly; Composite Quarterly; Composite 1
Seasonal
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4.262 Summary Quarter
4.262.1 Description
The quarter number (1-4) identifying a quarterly summary.
4.262.2 Source
System-generated via the Post process.
4.262.3 Attributes
Type: Number
Length: 1.0
Required: Yes
4.262.4 Uses
Quarterly Summaries
Site quarterly Summaries
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4.263 Summary Year
4.263.1 Description
The year identifying a summary.
4.263.2 Source
System-generated via the Post process, the Accuracy Data (RA) or Precision Data (RP)
Transactions, or AQS Maintain Accuracy Data (L62) or Maintain Precision Data (L61).
4.263.3 Attributes
Type: Number
Length: 4.0
Required: Yes
4.263.4 Uses
Annual Summaries
Quarterly Summaries
Monitor Precision Summaries
Precision Summary Protocols
Reporting Organization Precision Summaries
Monitor Accuracy Summaries
Accuracy Summary Protocols
Reporting Organization Accuracy Summaries
Site Annual Summaries
Site Quarterly Summaries
Site Design Values
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4.264 Supporting Agency
4.264.1 Description
Identifies the agency responsible for the operation of the monitoring site.
4.264.2 Source
User-specified via the Basic Site Information (AA) Transaction, or The Maintain Site form..
4.264.3 Attributes
Type: Character
Length: 8
Required: Yes
4.264.4 Uses
Sites
4.264.5 Value Assignment
The value must exist on the Agencies view, and, in combination with State Code, on the State
Agencies view.
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4.265 Surrogate Indicator
4.265.1 Description
Indicates whether a Total Suspended Particulate (TSP) monitor serves as a surrogate monitor
for PM-10.
4.265.2 Source
User-specified via the Basic Monitor Information (MA) Transaction, or the Maintain Monitor
form.
4.265.3 Attributes
Type: Character
Length: 1
Required: No
4.265.4 Uses
Monitors
4.265.5 Value Assignment
The valid values are "Y" and "N".
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4.266 Tangent Street Number
4.266.1 Description
Identifies the number of the street around the site for which the data are being submitted.
Street number is used to associate detailed street information for the site to streets closest to
the monitors at this site.
4.266.2 Source
User-specified via the Site Street Information (AB) Transaction, or The Maintain Site form..
4.266.3 Attributes
Type: Number
Length: 12.0
Required: Yes
4.266.4 Uses
Tangent Roads
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4.267 Time Period
4.267.1 Description
Indicates the period of time for which the summary covers.
4.267.2 Source
System-generated via the Accuracy Data (RA) or Precision Data (RP) Transactions, or AQS
Maintain Accuracy Data (L62) or Maintain Precision Data (L61).
4.267.3 Attributes
Type: Character
Length: 2
Required: Yes
4.267.4 Uses
Monitor Precision Summaries
Precision Summary Protocols
Reporting Organization Precision Summaries
Monitor Accuracy Summaries
Accuracy Summary Protocols
Reporting Organization Accuracy Summaries
4.267.5 Value Assignment
Time
Description
Period
Q1
1st quarter
Q2
2na quarter
Q3
3m quarter
Q4
4th quarter
YR
Entire year
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4.268 Time Zone
4.268.1 Description
A standard time zone, as established by Section 1 of the Standard Time Act, as amended by
Section 4 of the Uniform Time Act of 1966 (15 U.S.C. 261).
4.268.2 Source
User-specified via the Basic Site Information (AA) Transaction, or The Maintain Site form..
4.268.3 Attributes
Type: Character
Length: 30
Required: No
4.268.4 Uses
Sites
4.268.5 Value Assignment
The value must exist on the Time Zones view.
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4.269 Traffic Count
4.269.1 Description
An estimate of the daily traffic volume on the roadway.
4.269.2 Source
User-specified via the Site Street Information (AB) Transaction, or The Maintain Site form..
4.269.3 Attributes
Type: Number
Length: 12.0
Required: No
4.269.4 Uses
Tangent Roads
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4.270 Tribal Code
4.270.1 Description
A Federal Information Processing Standards (FIPS) code that identifies one of the tribal areas.
Used for Sites and Monitors owned or managed by Tribal Agencies that are within tribal
boundaries. This is a separate data field though in batch load it is used in conjunction with a
"TT" State Code value and OVERLAYS a County Code in batch load formats.
4.270.2 Source
User-specified via the Site Information (AA, AB, AC) Transactions, the Monitor Transactions
(MA through MK); or The Maintain Site form., Maintain Monitor (L2) and Standard Report
Selection (R31).
4.270.3 Attributes
Type: Character
Length: 3
Required: Yes, only for Tribal Sites
4.270.4 Uses
Sites
Tangent Roads
Open Paths
4.270.5 Value Assignment
The value must exist in the TRIBAL AREAS table.
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4.271 Tribal Indicator
4.271.1 Description
A flag, with value "TT", to indicate that this data is for a Native American Tribe, and that the
next field identifies a tribal area using the Bureau of Indian Affairs tribal code.
4.271.2 Source
User-specified via batch input transactions.
4.271.3 Attributes
Type: Character
Length: 2
Required: Yes, only for Tribal Sites
4.271.4 Uses
Batch input transactions.
Maintain Forms
Standard Reports
4.271.5 Value Assignment
Must have value "TT".
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4.272 Uncertainty Value
4.272.1 Description
The measure of method uncertainty associated with the sample data point, which will include
components of both the analytical and the volume uncertainty. No blank corrections are
assumed (other than laboratory baseline corrections which are an integral part of each
analysis).
4.272.2 Source
User-specified via the Raw Data (RD), Composite Data (RC), or Blank Data (RB)
Transactions, AQS Maintain Raw Data (L54), Maintain Blank Data (L53), or AQS Maintain
Composite Data (L51).
4.272.3 Attributes
Type: Number
Length: 6.5
Required: No
4.272.4 Uses
Raw Data
Composite Data
Blank Data
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4.273 Unrestricted Air Flow Indicator
4.273.1 Description
Indication of whether the flow of air to the monitor is restricted.
4.273.2 Source
User-specified via the Basic Monitor Information (MA) Transaction, or the Maintain Monitor
form.
4.273.3 Attributes
Type: Character
Length: 1
Required: No
4.273.4 Uses
Monitors
4.273.5 Value Assignment
Indicator
Description
Y
Flow is unrestricted
N
Flow is restricted by obstructions
W
Flow is restricted unavoidably, and the probe location has been approved
by the EPA
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4.274 Upper Probability Limit (Reporting Organization Accuracy
Summary)
4.274.1 Description
The upper bound of either a probability distribution, or confidence interval, for the applicable
population of accuracy audits.
If either quarter in either half of the year has an Count of Accuracy Audits (Reporting
Organization Accuracy Summary) of 1, then the source data for both quarters in that half will
be merged for purposes of calculating the upper probability/confidence limit, and reported
with the second quarter of the half (i.e., Q2 or Q4). In this case, there will be no value for the
corresponding first quarter in the half (i.e., Q1 or Q3).
4.274.2 Source
System-generated via Accuracy Data (RA) Transaction, or Maintain Accuracy (L61).
4.274.3 Attributes
Type: Number
Length: 6.4
Required: No
4.274.4 Uses
Reporting Organization Accuracy Summaries
4.274.5 Value Assignment
4.274.5.1 Analytical & Flow (Non-PM 2.5)
u = upper 95% probability limit, where:
I) = Mean (Reporting Organization Accuracy Summaries),
S = Standard Deviation (Reporting Organization Accuracy Summaries).
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4.274.5.2 Flow (PM 2.5)
where:
u = upper 95% confidence limit,
I) = Mean (Reporting Organization Accuracy Summaries),
S = Standard Deviation (Reporting Organization Accuracy Summaries),
10.975, n-i = the 0.975 quantile of the Student's T distribution with degrees of freedom
equal to n-1,
n = Count of Accuracy Audits (Reporting Organization Accuracy Summary).
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4.275 Upper Probability Limit (Reporting Organization Precision
Summary)
4.275.1 Description
The upper bound of either a probability distribution, or confidence interval, for the applicable
population of precision checks.
4.275.2 Source
System-generated via Precision Data (RP) Transaction, or Maintain Precision (L62).
4.275.3 Attributes
Type: Number
Length: 6.4
Required: No
4.275.4 Uses
Reporting Organization Precision Summaries
4.275.5 Value Assignment
4.275.5.1 Analytical & Flow (Other)
where:
u = upper 95% probability limit,
I) = Mean (Reporting Organization Precision Summaries),
S = Standard Deviation (Reporting Organization Precision Summaries).
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4.275.5.2 Flow (PM 2.5)
where:
u = upper 95% confidence limit,
I) = Mean (Reporting Organization Precision Summaries),
S = Standard Deviation (Reporting Organization Precision Summaries)
10.975, n-i = the 0.975 quantile of the Student's T distribution with degrees of freedom
equal to n-1,
n = number of flow checks (i.e. Count of Precision Checks (Reporting Organization
Precision Summary)).
4.275.5.3 Collocated (PM 2.5)
u = upper 90% confidence limit,
CV = coefficient of variation, (i.e., mean),
n = Count of Valid Collocated Data Pairs (Reporting Organization Precision Summary),
X2o.95,n = the 0.95 quantile of the chi-square distribution with degrees of freedom equal to
where:
n.
4.275.5.4 Collocated (Other)
where:
u = upper 95%) probability limit,
I) = Mean (Reporting Organization Precision Summaries),
S = Standard Deviation (Reporting Organization Precision Summaries).
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4.275.5.5 Federal Reference Method (FRM) Audit
where:
u = upper 95% confidence limit,
I) = Mean (Reporting Organization Precision Summaries),
S = Standard Deviation (Reporting Organization Precision Summaries),
10.975, n-i = the 0.975 quantile of the Student's T distribution with degrees of freedom
equal to n-1,
n = number of FRM pairs (i.e., Count of Precision Checks (Reporting Organization
Precision Summary)).
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4.276 Urban Area Code
4.276.1 Description
The urbanized area within which the monitoring site is located. An urbanized area is a U.S.
Census Bureau demographic entity that comprises a place and the adjacent densely-settled
surrounding territory that together have a minimum population of 50,000 people.
4.276.2 Source
Derived from the EPA master geospatial database (Envirofacts) by using the user-specified site
location (Latitude and Longitude). Note: This derivation from Envirofacts was implemented on
August 11, 2007. For sites created prior to this date, or with locations not updated since, the
field was entered by the user on either the Batch AA transaction or the Maintain Site form.
4.276.3 Attributes
Type: Character
Length: 4
Required: No
4.276.4 Uses
Sites
4.276.5 Value Assignment
If a value is provided by the user, it will be compared to the value derived from the
Envirofacts database, and a warning will be generated if they differ. (The value derived from
the Envirofacts database will be stored for the site.).
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4.277 Urban Area Represented
4.277.1 Description
The urbanized area from which the concentrations originated (not the location of the monitor).
4.277.2 Source
User-specified via the Monitoring Objective Information (ME) Transaction, or the Maintain
Monitor form.
4.277.3 Attributes
Type: Character
Length: 4
Required: No
4.277.4 Uses
Monitor Objectives
4.277.5 Value Assignment
Must have a value if none of CBSA Represented, CMSA Represented, CSA Represented, or
MSA Represented are valued. Conversely, must not have a value if any of CBSA Represented,
CBSA Represented, CMSA Represented, or MSA Represented are valued. If valued, that value
must exist on the Urbanized Areas view.
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4.278 User Horizontal Datum
4.278.1 Description
The edition of North American Datum used as the basis for determining the site coordinates.
(The editions of North American Datum establish a network of monuments and reference
points defining a mathematical surface from which geographic computations can be made.)
The World Geodetic Survey 1984 (WGS84) is one horizontal datum used by many Global
Positioning System (GPS) instruments. United States Geological Survey (USGS) maps often
use the North Atlantic Datum 1927 (NAD27).
This data element is required by the EPA Locational Data Policy. More information
regarding EPA data standards and policies may be found on the EPA Environmental Data
Registry (EDR) Website (http://www.epa.gov/edr/).
4.278.2 Source
User-specified via the Basic Site Information (AA) Transaction or The Maintain Site form..
4.278.3 Attributes
Type: Character
Length: 120
Required: Yes
4.278.4 Uses
Sites
4.278.5 Value Assignment
The value must exist on the LDP Horizontal Data view.
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4.279 User Latitude
4.279.1 Description
The monitoring site's angular distance north or south of the equator measured in decimal
degrees. The associated sign specifies the direction of measurement, a positive number
indicating north and negative indicating south.
The EPA Locational Data Policy (LDP) requires that coordinates be provided for all sites.
More information regarding EPA data standards and policies may be found on the EPA
Environmental Data Registry (EDR) Website (http://www.epa.gov/edr/).
4.279.2 Source
User-specified via the Basic Site Information (AA) Transaction or The Maintain Site form..
4.279.3 Attributes
Type: Number
Length: 2.6
Required: Yes
4.279.4 Uses
Sites
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4.280 User Longitude
4.280.1 Description
The monitoring site's angular distance east or west of the prime meridian at Greenwich,
measured in decimal degrees. The associated sign specifies the direction of measurement, a
positive number indicating east and negative indicating west.
The EPA Locational Data Policy requires that coordinates be provided for all sites. More
information regarding EPA data standards and policies may be found on the EPA
Environmental Data Registry (EDR) Website (http://www.epa.gov/edr/).
4.280.2 Source
User-specified via the Basic Site Information (AA) Transaction or The Maintain Site form..
4.280.3 Attributes
Type: Number
Length: 3.6
Required: Yes
4.280.4 Uses
Sites
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4.281 UTM Easting
4.281.1 Description
The easting Universe Transverse Mercator (UTM) coordinate, expressed in meters (i.e., the
horizontal distance from the reference edge of the UTM zone) for the site.
EPA Locational Data Policy requires that coordinates be provided for all sites. More
information regarding EPA=s data standards and policies may be found on EPA's
Environmental Data Registry (EDR) Website (http://www.epa.gov/edr/).
4.281.2 Source
User-specified via the Basic Site Information (AA) Transaction or The Maintain Site form..
4.281.3 Attributes
Type: Number
Length: 8.2
Required: No
4.281.4 Uses
Sites
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4.282 UTM Northing
4.282.1 Description
The northing Universe Transverse Mercator (UTM) coordinate expressed in meters (i.e., for
the Northern hemisphere, the vertical distance from the equator; for the Southern hemisphere,
10,000,000 minus the vertical distance from the equator) for the site.
EPA Locational Data Policy requires that coordinates be provided for all sites. More
information regarding EPA's data standards and policies may be found on EPA's
Environmental Data Registry (EDR) Website (http://www.epa.gov/edr/).
4.282.2 Source
User-specified via the Basic Site Information (AA) Transaction or The Maintain Site form..
4.282.3 Attributes
Type: Number
Length: 8.2
Required: No
4.282.4 Uses
Sites
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4.283 UTM Zone
4.283.1 Description
The zone of the Universal Transverse Mercator (UTM) system in which a site is located.
EPA Locational Data Policy requires that coordinates be provided for all sites. More
information regarding EPA=s data standards and policies may be found on EPA's
Environmental Data Registry (EDR) Website (http://www.epa.gov/edr/).
4.283.2 Source
User-specified via the Basic Site Information (AA) Transaction or The Maintain Site form..
4.283.3 Attributes
Type: Number
Length: 12
Required: No
4.283.4 Uses
Sites
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4.284 Vertical Accuracy
4.284.1 Description
Description of the accuracy of the vertical measure, reported in meters.
This data element is required by EPA Locational Data Policy (LDP). More information
regarding EPA=s data standards and policies may be found on EPA's Environmental Data
Registry (EDR) Website (http://www.epa.gov/edr/).
4.284.2 Source
User-specified via the Basic Site Information (AA) Transaction or The Maintain Site form..
4.284.3 Attributes
Type: Number
Length: 8.2
Required: Yes
4.284.4 Uses
Sites
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4.285 Vertical Collection Method
4.285.1 Description
The method used to determine the Locational Data Policy (LDP) vertical measure.
This data element is required by EPA LDP. More information regarding EPA=s data
standards and policies may be found on EPA's Environmental Data Registry (EDR) Website
(http://www.epa.gov/edr/).
4.285.2 Source
User-specified via the Basic Site Information (AA) Transaction or The Maintain Site form..
4.285.3 Attributes
Type: Character
Length: 3
Required: Yes
4.285.4 Uses
Sites
4.285.5 Value Assignment
The value must exist on the Vertical Collection Methods view
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4.286 Vertical Datum
4.286.1 Description
The edition of North American Datum used as the basis for determining the site coordinates.
(The editions of North American Datum establish a network of monuments and reference
points defining a mathematical surface from which geographic computations can be made.)
This data element is required by EPA Locational Data Policy (LDP). More information
regarding EPA=s data standards and policies may be found on EPA's Environmental Data
Registry (EDR) Website (http://www.epa.gov/edr/).
4.286.2 Source
User-specified via the Basic Site Information (AA) Transaction or The Maintain Site form..
4.286.3 Attributes
Type: Character
Length: 60
Required: Yes
4.286.4 Uses
Sites
4.286.5 Value Assignment
The value must exist on the Vertical Data view.
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4.287 Vertical Measure
4.287.1 Description
The elevation, in meters, above or below mean sea level (MSL) of the site.
This data element is required by EPA Locational Data Policy (LDP). More information
regarding EPA=s data standards and policies may be found on EPA's Environmental Data
Registry (EDR) Website (http://www.epa.gov/edr/).
4.287.2 Source
User-specified via the Basic Site Information (AA) Transaction or the AQS Maintain Site
form.
4.287.3 Attributes
Type: Number
Length: 8.2
Required: Yes
4.287.4 Uses
Sites
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4.288 Weighted Arithmetic Mean
4.288.1 Description
The weighted arithmetic mean.
4.288.2 Source
System-generated via the Post process.
4.288.3 Attributes
Type: Number
Length: 5.5
Required: No
4.288.4 Uses
Annual Summaries
Site Annual Summaries
4.288.5 Value Assignment
4.288.5.1 Seasonal and Everyday PM10
where:
i = quarter,
u; = Arithmetic Mean (Quarterly),
q = number of active quarters.
z
i= 1
i
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4.288.5.2 Stratified PM10
( (
n
\ \
s
Iv,.
I
7=1
n
j
k= i
V
k
where:
i = a sample value occurrence,
n = number of sample values in a stratum,
v; = a sample value,
j = a valued stratum,
s = number of valued strata,
k = a quarter with valued strata,
q = number of quarters with valued strata.
4.288.5.3 PM2.5
i = quarter,
u; = Arithmetic Mean (Quarterly) of appropriate exceptional data type,
q = number of active quarters.
where:
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4.288.5.4 Site-Level PM2.5
z
i= 1
q
where:
i = quarter,
u; = Arithmetic Mean (Site-Level Quarterly) of appropriate exceptional datatype,
q = number of active quarters.
4.288.5.5 Default
Not valued.
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4.289 Worst Site Type
4.289.1 Description
Within a particular monitoring area, those monitors with the highest PM-10 concentrations
must have their worst site type set to 1, and are expected to monitor at the recommended
collection frequency. Other monitors must be classified as either not worst site monitors, or
monitoring on an accelerated schedule, but not at the recommended collection frequency.
4.289.2 Source
User-specified via the Basic Monitor Information (MA) Transaction, or the Maintain Monitor
form.
4.289.3 Attributes
Type: Character
Length: 20
Required: Yes
4.289.4 Uses
Monitor Pollutant Areas
4.289.5 Value Assignment
Value
Description
1
Classified as having the highest PM-10 concentration and is expected to
monitor at recommended sampling frequency.
2
Classified as not being a worst site monitor.
3
Monitoring on an accelerated schedule, but not at the recommended
sampling frequency.
4.289.5.1 Monitoring Areas
May be valued for a Monitoring Area.
4.289.5.2 Default
Not valued.
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4.290 Year of Traffic Count
4.290.1 Description
The year when the Traffic Count value was estimated.
4.290.2 Source
User-specified via the Site Street Information (AA) Transaction, or The Maintain Site form..
4.290.3 Attributes
Type: Number
Length: 4.0
Required: Yes
4.290.4 Uses
Tangent Roads
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4.291 Year Represented
4.291.1 Description
The year represented by the audit. For a particular audit, indicates the actual dates (Year) in
which the sample was collected.
4.291.2 Source
User-specified or system-generated via the Accuracy Data (RA) Transaction or AQS
Maintain Accuracy (L62).
4.291.3 Attributes
Type: Number
Length: 4
Required: Yes
4.291.4 Uses
Accuracy Data
4.291.5 Value Assignment
4.291.5.1 Lead
User-specified. Value is either the year of or the year prior to the Accuracy Date.
4.291.5.2 Default
Derived from Accuracy Date.
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4.292 Zero Span
4.292.1 Description
A measurement obtained with gas from a zero concentration. Zero span is the observed value
read from the instrument when the concentration of the specific parameter used to test the
monitor was zero.
4.292.2 Source
User-specified via the Accuracy Data (RA) Transaction or AQS Maintain Accuracy (L62).
4.292.3 Attributes
Type: Number
Length: 5.5
Required: No
4.292.4 Uses
Accuracy Data
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4.293 Zero Span Scale
4.293.1 Description
The number of digits to the right of the decimal point that were specified by the user,
including trailing zeros.
4.293.2 Source
System-generated via the Accuracy Data (RA) Transaction or AQS Maintain Accuracy
(L62).
4.293.3 Attributes
Type: Number
Length: 1.0
Required: No
4.293.4 Uses
Accuracy Data
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4.294 Zip Code
4.294.1 Description
The U.S. Postal Service Zone Improvement Plan (ZIP) Code used to address the monitoring
site.
4.294.2 Source
Derived from the EPA master geospatial database (Envirofacts) by using the user-specified site
location (Latitude and Longitude). Note: This derivation from Envirofacts was implemented on
August 11, 2007. For sites created prior to this date, or with locations not updated since, the
field was entered by the user on either the Batch AA transaction or the Maintain Site form.
4.294.3 Attributes
Type: Character
Length: 9
Required: No
4.294.4 Uses
Sites
4.294.5 Value Assignment
If a value is provided by the user, it will be compared to the value derived from the
Envirofacts database, and a warning will be generated if they differ. (The value derived from
the Envirofacts database will be stored for the site.)
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