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Laboratory records of decision and other supporting documents.

Technical Memoranda

Electronic technical memoranda released by the NWQL from 1992 to present.

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Water Resources Mission Area Memorandum 2020.04

This policy pertains to analytical methods (or modifications of methods) used by laboratories operated in the WMA or in support of WMA-funded activities when those methods are used to produce data delivered to the public.

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TM22-03 Alkalinity samples analyzed at the Analytical Trace Element Chemistry and Common Services Laboratory (USGSTECO)

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TM22-04 Revision of results for ammonia by KONE for 817 samples analyzed January – March 2022

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Attachment 1. Original and Corrected Results for NWQL Technical Memorandum 22-04

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TM21-02 Reload of qualified environmental sample results for Ammonia, Nitrite and Orthophosphate by the Kone Method due to loss of scientific integrity

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TM21-02 Attachment 3: Rapi-Note 22-18; Reload of value-qualifier codes and comments associated with results for laboratory codes 3116, 3117, and 3118 ("Kone 3-Channel method") associated with scientific data integrity incident

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TM21-02 Attachment 2: Counts of all QC results from March 2019 – July 2020 categorized by analyte code and whether the result failed QC criteria "high" or "low" or if the result passed QC acceptance criteria.

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TM21-02 Attachment 1: Original and corrected results

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TM21-02 Attachment 4: R Scripts for logic checks applied to revise and qualify the KONE Method results

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National Water Quality Lab 2022 Independent External Assessment

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TM22-02 New journal publication for use when citing the detection limit procedures and data reporting (reporting level) conventions applied to NWQL methods in USGS publications