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by CCR Title 23, Chapter 15, Article 5 guidelines. Thus, when the alpha level was higher <br />than 1 percent, the concentration limit was not established and footnoted as to why. <br />1 Nonstatistical Approach <br />When the background data set contains 100 percent nondetect values, Sanitas applies the <br />nonstatistical approach. This approach takes into consideration that if historically a <br />constituent has not been detected, any detection of that constituent would be considered <br />' an exceedance. Thus, in these situations (100 percent nondetected values), the tolerance <br />limit is set at "detect", meaning that if a value is detected above its method detection limit, <br />this value is an exceedance of the concentration limit. <br />�l <br />I <br />J <br />71 <br />L <br />u <br />