First 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 first quarter of 2007.

QA Sample Type

Number of Sample Results

Number of Results Meeting Criteria

Percentage Meeting Criteria

Spikes/Laboratory Control Samples

255

254

99.6

Field Duplicates

66

63

95.5

Laboratory Splits

30

30

100

Recounts

165

165

100

Blanks

67

66

98.5

Method Uncertainty

1689

1628

96.4
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