EXH0037017502

Please title this page. (Page I) Page I of 4 _ Re_t__urn.to PQL/MCL Index Table ',5 7/ GUIDANCE FOR THE USE OF TABLES: I/-,4'r__ PRACTICAL QUANTITATION LIMITS (PQLS), METHOD DETECTION LIMIT (MDLS), AND PQL COMPARISONS TO METHOD B CLEANUP LEVELS This guidance is Pan II of four pans. They are: Part I: Implementation Memo No. 3--pQLs as Cleanup Standards Part II: Guidance For The Use of Tables (this document) Pan III: MDL, PQL, and Comparisons Tables Pan IV: Appendix--Meaning of Quantitation Limits The Model Toxics Control Act (MTCA) provides human health risk-based cleanup levels for contaminants at cleanup sites. For certain compounds the risk-based values (Method B values) are less than the lowest levels which can be routinely quantified and reported by a laboratory. These lowest levels are known as the "practical quantitation limits" (PQLs). The "method detection limit" (MDL) is used mostly by the laboratory analyst and not usually reported, but can provide useful information to the site manager. To provide a cleanup site manager with information on PQLs and the MDLs, we prepared tables of these values including a comparison to the MTCA Method B levels. The MDL and/or PQL for a substance can be useful when requesting analytical work to verify it is possible to achieve the desired analytical limit. With information in these tables about the MDLs and PQLs for different analytical methods the site manager can choose the appropriate method and avoid wasteful analytical work that does not provide the desired limit. The site manager…

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PSCAA Advisory Council Meeting Agenda
Add to CalendarMWednesday Mar 11, 9:00am - 11:35am
1904 3rd Avenue, Suite 105, Seattle, WA 98101
Call to order – Roll Call – Quorum Established – Land Acknowledgement We would like to acknowledge that our Agency operates in four present-day counties, which are the traditional lands of the Coast Salish people, past and present. This acknowledgement does not take the place of authentic relationships with indigenous communities in our jurisdiction and [...]