Table 34

WISCONSIN AMBIENT AIR QUALITY STANDARDS AS FOUND IN NR 404.03, WISCONSIN
ADMINISTRATIVE CODE, ADAPTED FROM NATIONAL AMBIENT AIR QUALITY STANDARDS
Method of
Pollutant            Time of Average     Primary Standarda  Secondary Standarda     Determination
Particulate Matter (PM10) Annual (arithmetic mean) 50 jg          50 jg b             High-volume sampler with
24-hour                 150 Igb           150 pgb              size selective inlet
Particulate Matter (TSP)  24-hour                      - -        150 igh             High-volume sampler
Sulfur Oxides (SOX)     Annual (arithmetic mean) 80 jg (0.03 ppm)         - -         Pulsed and continuous
24-hour                 365 jig (0.14 ppm)b       - -          fluorescence
(measured as SO2)      Three-hour                                1,300 jig (0.5 ppm)b
Carbon Monoxide (CO)    Eight-hour              10 mg (9 ppm)b    Same as primary     Nondispersive infrared
One-hour                40 mg (35 ppm)b   Same as primary
Nitrogen Dioxide (NO2)  Annual (arithmetic mean)  100 jg (0.05 ppm)  Same as primary  Chemiluminescence
Ozone (03)              One-hour                0.12 ppm (235 jig)b  Same as primary  Ultraviolet absorption, and
chemiluminescence
Lead (Pb)               Calendar quarter
(arithmetic mean)      1.5 jg                    - -         Atomic absorptionc

NOTE: Former Standards
Particulate
Matter (TSP)

Annual (geometric mean) 75 pg
24-hour                260 pgb

60 pg
150 gb

High-volume sampler

aConcentration in weight per cubic meter (all except ozone corrected to 250C and 760 mm of Hg).
bConcentration not to be exceeded more than once (separate days for ozone) per year.
cAnalysis is conducted on acid extract of high-volume filter particulate.
Source: Wisconsin Department of Natural Resources; and U. S. Environmental Protection Agency.

lead has been added to the list of criteria
pollutants. Of particular importance is the
change in the standards for particulate matter.
Previously, the particulate matter standards
were measured as total suspended particulates,
or TSP. Recognizing that the smaller, more
respirable-sized, particles were responsible for
observed health-related impacts, the EPA
replaced the TSP standards with standards for
particles less than 10 microns in size, the PM10
standards, on July 1, 1987. The established
PM10 standards are lower than the former TSP
standards since the fine particles represent only
a fraction of all airborne particulates.
The State of Wisconsin, while adopting the
PM10 standards, has retained the secondary 24-
hour average TSP standard. The Wisconsin

Department of Natural Resources (DNR) enfor-
ces the secondary 24-hour average TSP standard
in order to protect the public welfare. The DNR
maintains that the elimination of TSP as the
indicator of the secondary 24-hour average
standard has, in effect, relaxed the standard.
The DNR position is that the level of the federal
24-hour average PM10 standard, set at 150
micrograms per cubic meter (gg/m3) for both the
primary and secondary levels, does not ade-
quately compensate for the reduced particulate
matter loading which is being measured. Among
other damage, the DNR notes that soiling
resulting from fugitive emissions of TSP have
been known to create a public nuisance when
ambient levels of particulate matter are above
the level of the existing secondary 24-hour
average standard, 150 4g/m3, measured as TSP.

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