The type of blank being reported (Trip, Field, Lab, etc.). The blank type describes how the un-exposed filter was handled. It has possible values of: FIELD, LAB, TRIP, BACKUP FILTER, or FIELD 24HR. A type of FIELD means that the filter was placed in the instrument and removed before operation of the instrument. A type of LAB means that the filter has not been taken to the site. A type of TRIP means that the filter was taken to the site, but not placed in the instrument. A type of BACKUP FILTER is a quartz filter that is collected behind the routine quartz filter to assess organic carbon sampling artifacts. A type of FIELD 24HR is a blank filter that is placed in the sampling device for the entire period of sampling, which is 24 hours in this case. These blanks remain in the sampling device for the duration of sampling and are shipped, handled, and analyzed in an identical manner to the routine sample filter.
Required on submission.
Must be one of: FIELD, LAB, TRIP, BACKUP FILTER, or FIELD 24HR.
For submission, the combination of Blank Type, Date, and Time must not already be in database for Monitor.