Quality Assurance at the CAL

1. Quality Assurance at the CAL Jane Rothert 2007 Field Operations Training Course

2. Site Supplies QA Internal Laboratory QA External Laboratory QA

3. Site Supplies QA AIRMoN and NTN use about 281 buckets, bottles, & lids per week • 1 bucket checked for cleanliness per 47 shipped • 1 1-L bottle checked per 64 shipped • 1 250-mL bottle checked per 104 shipped • 1 lid check for 141 shipped

4. Water left in the buckets and/or bottles should be discarded before using!

5. Lid and bucket storage bags are checked for cleanliness • 1 bag checked per 140 used

6. 50 and 150 mL volumes • 2 solutions used • DI water • Simulated Rainwater • Control limits/charts

7. Additional Supplies that are Quality Assured • DI Water used for standards • Filters • Sample bottles Total of 20 different supply checks per week

8. Internal Laboratory QA • Standardization of instruments • QA samples analyzed along with samples • Replicates • Internal Blind samples • Reanalysis • Random • IPD/CPD

9. External Laboratory QA • Interlaboratory Comparisons • NWRI • NILU • USGS • WMO/GAW

10. Conclusion: ~1% of supplies checked for cleanliness ~30% of analyses are QA samples