The verification test described in this document will be conducted under the auspices of the U.S. Environmental Protection Agency (EPA) through the Environmental Technology Verification (ETV) Program. It will be performed by Battelle, which is managing the ETV Advanced Monitoring Systems (AMS) Center through a cooperative agreement with EPA. The scope of the AMS Center covers verification of monitoring technologies for contaminants and natural species in air, water, and soil. This verification test will be coordinated and directed by Battelle in cooperation with EPA. This test will include a 30-day period of field testing that will be conducted at the Battelle Columbus Operations Special Support Site (BCS3) located at 2555 International St., in Columbus, OH. The field testing is planned to involve the evaluation of multiple commercial monitors for black carbon (BC) in airborne particulate matter. The vendors of the BC monitors will install, maintain, and if necessary repair their systems during the verification test. Reference method sampling for BC will be performed by Battelle and analysis of the collected reference samples will be performed by Desert Research Institute (DRI) under a purchase order from Battelle. Quality assurance (QA) oversight will be provided by the Battelle AMS Center Quality Manager, and the EPA at its discretion. This test is Quality Category III which requires a QA review of 10% of the test data (see section C1). The organization chart in Figure 1 identifies the responsibilities of the organizations and individuals associated with the verification test. Roles and responsibilities are defined further below. A4.1 Battelle Dr. Kenneth Cowen is the AMS Center Verification Test