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<strong>QATS</strong> <strong>SPECIAL</strong>-<strong>REQUEST</strong> & <strong>SITE</strong>-<strong>SPECIFIC</strong> <strong>PESs</strong><br />
REGION IX PGAN <strong>SITE</strong><br />
Spike<br />
Concentration<br />
1 ppb (n=3)<br />
2 ppb (n=3)<br />
Perchlorate Detection Limit Challenge<br />
Regional Lab<br />
All detected<br />
Ave. = 1.3 ppb<br />
All detected<br />
Ave. = 1.9 ppb<br />
Contract Labs<br />
All reported as nondetected<br />
All detected<br />
Ave. = 2.4 ppb<br />
19th Annual NARPM Training Conference June 2-5, 2009 Atlanta, Georgia 17
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