Central California Ozone Study (CCOS) - Desert Research Institute

CCOS Field Operations Plan Version 2: 5/31/00
data acquisition, and flight termination. A rawinsonde system audit checklist is used during the
system audit to ensure that all aspects of the audit are covered in a consistent manner.
4.4.5 NMOC/Carbonyl Samplers
The system audit of the NMOC/Carbonyl samplers consists of a review of the sampler
siting and observation of sample loading and handling procedures. This includes observing the
site technician during routine loading and unloading of the sampler to assure that procedures
documented in the sampler’s SOP’s are being followed. The system audit verifies, at a
minimum, the following:
• Sample chain-of-custody
• Sample labeling
• Sample loading procedures
• Sample storage
• Sample shipping procedures
• Sample blanks
• Flow calibration and measurement procedures
• Training received by the technician
• Sampler location
• Pump venting
• Presence of any obstructions or trees
• Sampler preventive maintenance and spare parts inventory
• Cyclone or impactor cleaning (if used)
A detailed system audit checklist is used during the system audit to assist the auditor and
document the results. In general, system audit results are compared with existing EPA siting and
sample handling guidelines for these samplers.
4.4.6 Continuous Gas/Particulate Analyzers
The system audits of the continuous gas/particulate analyzers, including particle counters
and nephelometers, will incorporate review of the following:
• Probe height
• Probe exposure
• Proximity of sources
• Sample manifold and/or sampling line construction
• Sample residence time
• Calibration procedures
• Calibration standards and their certification
• Zero/span checks
• Preventive maintenance
• Spare parts inventory
• Data acquisition equipment and procedures
Chapter 4: QUALITY ASSURANCE 4-12