Abbreviations and Symbols Used in Table 3

SITE ID

Site Identification number

POC

Parameter Occurrence Code
differentiates between monitors for a given pollutant

MT

Monitor type

1	NAMS
2	SLAMS
3	Other
4	Industrial
6,7,8	PAMS
0	Unknown
C	Non EPA Federal

YR

Year

REP ORG

Reporting Organization

#OBS

Number of Observations

MAX 24-HR

1ST	Highest 24-hour value recorded in the year
2ND	Second highest 24-hour value recorded in the year
3RD	Third highest 24-hour value recorded in the year
4TH	Fourth highest 24-hour value recorded in the year

ARITH MEAN

Arithmetic mean

WTD ARITH MEAN

Weighted arithmetic mean

GEO MEAN

Geometric mean

GEO STD

Geometric standard deviation

QUARTERLY ARITH MEANS:

1ST	First quarter arithmetic mean
2ND	Second quarter arithmetic mean
3RD	Third quarter arithmetic mean
4TH	Fourth quarter arithmetic mean

MEANS > 1.5

Number of quarterly means greater than 1.5 µg/m³ for lead

MAX VALUES

1ST	Highest 24-hour value recorded for the year (except Pb for Connecticut and New Hampshire, which are monthly values)
2ND	Second highest 24-hour value recorded for the year (except Pb for Connecticut and New Hampshire, which are monthly values)

METH

Method

MAX 1-HR

1ST	Highest 1-hour value recorded in the year
2ND	Second highest 1-hour value recorded in the year

OBS > 35

Number of observations greater than 35 ppm for CO

MAX 8-HR

1ST	Highest 8-hour value recorded in the year
2ND	Second highest 8-hour value recorded in the year

OBS > 9

Number of 8-hour ave. greater than 9 ppm for CO

OBS > 365

Number of 24-hour ave. greater than 365 µg/m³ for SO₂

MAX 3-HR

1ST	Highest 3-hour value recorded in the year
2ND	Second highest 3-hour value recorded in the year

OBS > 1300

Number of 3-hour ave. greater than 1300 µg/m³ for SO₂

NUM MEAS

The valid number of days measured

NUM REQ

The valid number of days in the ozone season

NUM OBS

Number of Observations

SCHEDULED NUM OBS

Number of observations scheduled

% OBS

Percent completed of number of observations scheduled

VALID DAILY 1-HR MAXIMUM

Maximum hourly values for

1ST	the highest day
2ND	the second highest day
3RD	the third highest day
4TH	the fourth highest day

VALS > .125

MEAS	Number of measured daily maximum >= 0.125 ppm
EST	Number of expected violations

MISS DAYS ASSUMED < STANDARD

Number of missing days assumed to be less than the standard

The data in Table 3 consists of both state and private networks.