Central California Ozone Study (CCOS) - Desert Research Institute

CCOS Field Operations Plan Version 2: 5/31/00
Device Manufacturer Model Element Range
Bubble meter Teledyne/Hastings 0 - 5 lpm
Laminar flow meter Meriam 50MK10 725250-C1 0 - 50 cc/min
Laminar flow meter Meriam 50MK10 725250-C2 0 - 1 lpm
Laminar flow meter Meriam 50MJ10-1/2 700310-T2 0 - 10 lpm
Laminar flow meter Meriam 50MJ10-1/2 700310-T1 0 - 50 lpm
Laminar flow meter Meriam 50MW20-1 700310-T3 0 - 200 lpm
The Laminar flow devices are certified annually against a primary flow standard by an external
laboratory. The bubble flow meter is a primary flow measuring device, and therefore requires no
certification. Parsons also maintains a bubble flow meter.
Flow Meters - Several flow meters are available as transfer standards for this study.
These flow meters and their operating ranges are summarized below:
Make Model SN Range Type
Bubble-O 0 - 400 ccpm Bubble
Bios DC-Lite 0 - 20 lpm Piston
Schlumberger Remus 4, G1-6 0 - 20 lpm Dry test
Teledyne-Hastings HS-10KS 16045 0 - 10 lpm Mass flow
Teledyne-Hastings HS-50JS 16944 0 - 50 lpm Mass flow
Teledyne-Hastings HS-10S 17259 0 - 150 lpm Mass flow
All flow meters will be certified against suitable flow standards prior to being used in the field.
Certifications consist of a comparison between the flow meter and the appropriate QA laminar
flow standard at at least 10 different flow spaced evenly across the operating range of the mass
flow meter.
Continuous Air Quality Analyzers
Dilution Standards and Gases - Multipoint audits will be performed using either a Dasibi
1009 CP dilution system, an Environics Series 100 dilution system, or equivalent system. These
systems are maintained and the flow rates certified by Parsons’ and the
departments. The zero air source will be either a cylinder of Ultra-Pure Air that will be supplied
by Scott Specialty Gases or an Aadco 737R pure air system with CH4 burner and compressor
capable of delivering a constant 20 lpm air supply. The span gases, except for the SUVA
refrigerant, will be provided by Scott Specialty Gases. All gas standard analysis is performed in
accordance with EPA Protocols and is traceable to National Institute of Standards and
Technology (NIST) standards.) For the CCOS audits, Relative Accuracy Test Audits (RATA)
Class cylinders will be used, which are certified to with ±1% of true. SUVA refrigerant will be
used to audit the nephelometers. This compound has a known scattering coefficient that is
within the nephelometer measurement range.
Ozone - All field ozone transfer standards will be certified against a primary standard.
Procedures for certification and recertification of ozone primary and transfer standards are based
on the EPA technical assistance document, Transfer Standards for Calibration of Air Monitoring
Analyzers for Ozone (EPA 1979), EPA-600/4-79-056. All ozone transfer standards used for
Chapter 4: QUALITY ASSURANCE 4-8