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Organic Blind Sample Project

OBSP Summary Reports

The Branch of Quality Systems (BQS) operates an Organic Blind Sample Project (OBSP). One of the goals of the project is to document bias and variability for the National Water Quality Laboratory (NWQL) through the use of blind quality assurance (QA) samples. From these summaries, districts can be informed of the NWQL's performance on QA samples that parallel their own environmental samples.
Cumulative Method Reports
The cumulative method reports are primarily intended for the data users to aid in their interpretation of environmental data over time. All analytes listed in the cumulative method reports will have associated time series charts.

(NOTE: The OBSP Summary Reports are created using Microsoft Word or Excel. It is advisable to use this or similar software when printing these reports.)

2007 Cumulative Method Reports

Lab Schedule 1319 - Organophosphorus Pesticides, Whole Water Recoverable (WWR)
Lab Schedule 1324 - Organochlorine Pesticides by GC, Whole Water Recoverable (WWR)
Lab Schedule 1383 - Semivolatile Compounds (base/neutral/acid - BNA), WWR
Lab Schedule 1433 - Waste Water Compounds by GCMS, Filtered
Lab Schedule 2001 - Pesticides determinations by SPE and GCMS, Filtered
Lab Schedule 2021 - NAWQA 85 Volatile Organic Compounds by GCMS, WWR, Acidified
Lab Schedule 2033 - NAWQA ACT/ULUG Selected, Filtered Pesticides and Degradates plus 20 additional compounds
Lab Schedule 2060 - Polar Pesticides and Metabolites by SPE and HPLC/MS, Filtered
Lab Schedule 2080 - Human-Health Pharmaceuticals by SPE and HPLC/MS, Filtered
Lab Schedule 4024 - Gasoline Oxygenates, Un-acidified, Wat, Unfiltered
Carbon Section (includes TOC, DOC, Phenol, Oil and Grease, and Carbon in Sediment)