01681nam 2200421 450 991071209670332120190322104856.0(CKB)5470000002489130(OCoLC)1090412594(EXLCZ)99547000000248913020190322d2017 ua 0engur|||||||||||txtrdacontentcrdamediacrrdacarrierConducting technical systems audits of ambient air monitoring programs quality assurance guidance document[Research Triangle Park], NC :U.S. Environmental Protection Agency, Office of Air Quality Planning and Standards, Air Quality Assessment Division,2017.1 online resource (199 unnumbered pages) illustrations (some color), forms"November 2017.""EPA-454/B-17-004."Includes bibliographical references.Conducting technical systems audits of ambient air monitoring programs AirPollutionUnited StatesMeasurementAir qualityStandardsUnited StatesAir qualityUnited StatesAir quality monitoring stationsUnited StatesAirPollutionMeasurement.Air qualityStandardsAir qualityAir quality monitoring stationsUnited States.Environmental Protection Agency.Air Quality Assessment Division,GPOGPOBOOK9910712096703321Conducting technical systems audits of ambient air monitoring programs3449892UNINA