MG - Monitor Road

The monitor’s relationship to nearby streets may be described by using the MG transaction.

Rules

Road referenced by these transactions must first be defined with the Site Road transaction.

If either tangent road number or distance from monitor is valued, the other must also be valued. Similarly, one may not be deleted without also deleting the other.

Examples:

MG transaction in default mode

MG|I|06|001|0007|88101|3|1|70.1

MG transaction in Tribal mode

MG|I|TT|405|7416|11101|1|1|35

Format

MG - Monitor Road transaction format

Seq.	Name	Description	Formatting Rules	Required	Key
1	Transaction Type	Monitor Tangent Roads transaction identifier.	Must = MG	Always
2	Action Indicator	Indicator for Insert, Update, or Delete action.	Must = I, U, or D	Always
3	State Code / Tribal Indicator	The FIPS state code of the monitor, or “TT” to indicate that the next field on the transaction is a Tribal code.	Must exist in STATES Reference Table or be ‘TT’ for Tribal Site	Always	Y
4	County Code / Tribal Code	The FIPS County Code of the site. If the previous field on the transaction contains “TT”, then the Tribal Code of the site.	Must exist in COUNTIES (for state) or TRIBAL_AREAS Reference table	Always	Y
5	Site Number	Four digit number to uniquely identify site in county and/or tribe.	Must exist in SITES table with {State Code, county Code} or Tribal Code	Always	Y
6	Parameter Code	The AQS parameter code assigned to the monitor in AQS.	Must exist in PARAMETERS reference table.	Always	Y
7	POC	Parameter Occurrence Code: One or two digit number identifying a specific monitor for a parameter at the site.	Must exist in MONITOR table for non-Insert actions.	Always	Y
8	Tangent Street Number	Number from Site record identifying a nearby street.	Must exist in site tangent street table.	Always	Y
9	Distance from Monitor to Tangent Road	The distance in meters between the sensing of air sampling equipment at a monitoring site and the nearest edge of the roadway.	Decimal.	Unless Delete