Permits Limits and Analytical Methods
- Archived: Tue, 17 Jul 2001 17:59:00 -0400 (EDT)
- Date: Tue, 17 Jul 2001 17:55:12 -0400 (EDT)
- From: Linda Moore <ljmoore@netnitco.net>
- Subject: Permits Limits and Analytical Methods
- X-topic: Permits and Rules
Within the scope of permit making, it is important that permit writers keep abreast of the analytical methodologies that are currently promulgated and their capabilities (LOD). Many times permit holders have unique matrices which challenge the capabilities of the analytical methods and technologies that are in use. When laboratories perform detection limit studies, the 40 CFR approved protocol includes the use of a clean matrix. The resulting limits method detection limits (MDLs) and Practical Quantitation Limits (PQLS) may not be achievable on samples from the real world. When setting permit limits, the agencies should consider having the permit holder do detection limit studies with their actual matrices so that analytical limitations can be addressed up front. If the analytical methodology isn't capable of making accurate and precise measurements of a particular compound, how can a permit limit for the compound be effectively monitored ?
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