MH - Monitor Obstruction

The type of obstruction for a monitor with restricted air flow is described by using the MH transaction.

Rules

A Monitor Obstruction record may not be created if the unrestricted air flow indicator for the monitor (State Code, County Code, Site ID, Parameter, POC) is “Y”.

A Monitor Obstruction record is required if the unrestricted air flow indicator for the monitor (State Code, County Code, Site ID, Parameter, POC) is “N” or “W”.

Examples:

MH transaction in default mode
MH|I|06|073|1201|88101|2|CLIFFS|SSW|627.64|413.31
MH transaction in Tribal mode
MH|I|TT|434|0007|11101|1|BUILDINGS|W|4|2

Format

MH - Monitor Obstruction transaction format

Seq.

Name

Description

Formatting Rules

Required

Key

1

Transaction Type

Monitor Obstruction Info transaction identifier.

Must = MH

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

Probe Obstruction Type

The type of obstruction responsible for the restricted air flow of a monitor.

Must exist in PROBE OBSTRUCTION TYPES reference table.

Always

Y

9

Direction from Monitor to Probe Obstruction

The true direction from the monitor to the obstruction.

Must exist in COMPASS SECTORS reference table.

Always

10

Distance from Monitor to Probe Obstruction

The distance, in meters, between the probe and obstruction.

Decimal.

Always

11

Probe Obstruction Height

The height, in meters, of the top of the obstruction above the probe.

Decimal.

Always