Fourth Quarter 2007
INL Quarterly Site Environmental Report
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Quality Assurance

The ESER Quality Assurance Program consists of five ongoing tasks which measure:

  1. method uncertainty
  2. data completeness
  3. data accuracy, using spike, performance evaluation and laboratory control samples
  4. data precision, using split samples, duplicate samples and recounts
  5. presence of contamination in samples, using blanks.

Sample results are compared to criteria described in the Quality Assurance Project Plan for the INL Site Offsite Environmental Surveillance Program (Stoller 2007). The following table summarizes the results of the quality assurance program for the fourth quarter of 2007.
 

QA Sample Type

Number of Sample Results

Number of Results Meeting Criteria

Percentage Meeting Criteria

Spikes/Laboratory Control Samples

211

210

99.5

Field Duplicates

69

66

95.7

Laboratory Splits

19

19

100

Recounts

193

191

99.0

Blanks

68

68

100

Method Uncertainty

1870

1844

98.6


 

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Fourth Quarter 2007
INL Quarterly Site Environmental Report
Return to Index