FHWA and EPA National Near-Road Study - Detroit

General Rules - All Stations

Where O_Vref is ≠ 0, then mark as invalid all data from all continuous analyzers

When NO = negative, mark NO as invalid

When NO = negative, mark NO2 as invalid

When NO = negative, mark NOx as invalid

When NO = negative, mark Nox_Flow as invalid

When NO = negative, mark Nox_Pres as invalid

When CO = negative, mark as invalid data

When CO = negative, CO_Flo is invalid

When CO = negative, CO_Chass is invalid

When TEOM_Sta ≠ 0 and TEOM_Op ≠ 4, then mark as invalid all TEOM parameters for that record

When TEOM Filter_A or TEOM Filter_B > 75, then mark all TEOM parameters as invalid

When Aeth < 0, then mark as invalid Aeth data

When Aeth > 15, then mark data as outliers

When Aeth_1 < 0, then mark as invaild Aeth_1 data

When Aeth_2 < 0, then mark as invalid Aeth_2 data

When Aeth_3 < 0, then mark as invalid Aeth_3 data

When Vaisala_1 < 0, then mark all Vaisala parameters invalid (Vaisala, Vaisala_1)

When GasCal_S = 3 or 6 or 7 or 15 or 18 or 19, mark all gas analyzer parameter data invalid: NO; NO2; Nox; NOx Flow; NOx Pres; CO; CO Flow; CO Chass.

GasCal_S

When NO > 450, then mark as outlier (NO, NO2, NOX) for that record

When CO > 2.25, then mark as outlier (CO) for that record

When PM10 > 400, mark data as outliers

When PM2_5 > 100, mark data as outliers

When PM_Coars < 0, mark PM_Coars as invalid

When Aeth > 15, then mark data as outliers