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National Water Quality Laboratory

Monday October 22, 2018

NWQL Technical Memoranda

Number ♦ Date ◊ Subject ◊ Author



18-02 ♦ April 30, 2018

Validation of high-temperature catalytic oxidation carbon analyzers for analysis of organic carbon in water samples
Heather Miller (303) 236-3189 (hmiller@usgs.gov)
Julie Ray (303) 236-3247 (jlawrenc@usgs.gov)
Cecilia O'Connor (303) 236-3142 (coconnor@usgs.gov)

18-01 ♦ October 01, 2017

Validation of inductively-coupled plasma mass spectrometer instruments for analysis of trace metals in unfiltered-water and filtered-water samples
◊ Sarah J. Stetson (303) 236-3277 (sstetson@usgs.gov)
◊ Heather Miller (303) 236-3189 (hmiller@usgs.gov)

17-01 ♦ March 28, 2017

16-02 ♦ August 19, 2016

16-01 ♦ August 12, 2016

15-02 ♦ Jun 4, 2015

15-01 ♦ May 01, 2015

14-01 ♦ October 01, 2014

13-01 ♦ November 20, 2013

11-02 ♦ July 15, 2011

11-01 ♦ May 06, 2011

Requirements for the Proper Shipping of Samples to the National Water Quality Laboratory
◊ Pat Alex (paalex@usgs.gov),(303) 236-3181, Support Services Section, USGS, National Water Quality Laboratory
◊ Phil Grano (pwgrano@usgs.gov),(303) 236-3707, Support Services Section, USGS, National Water Quality Laboratory

07-03 ♦ June 01, 2007

07-02 ♦ May 31, 2007

Removal of Selected Pesticides and Degradation Products from Schedule 2060
◊ Bruce Anderson, Analytical Services Section,USGS, National Water Quality Laboratory

07-01 ♦ January 31, 2007

Turbidity Method History
◊ Glenda E. Brown (gebrown@usgs.gov), (303)236-3160, Business Development Team, USGS, National Water Quality Laboratory

06-01 ♦ May 3, 2006

Review of method performance and improvements for determining wastewater compounds (Schedule 1433)
◊ Steven D. Zaugg (sdzaugg@usgs.gov) and Thomas J. Leiker, USGS, National Water Quality Laboratory

05-03 ♦ February 3, 2005

Changes in reporting levels and data qualifiers for selected pesticides and degradation products in schedule 2060
◊ Mark R. Burkhardt, (mrburk@usgs.gov) Ron Brenton, and Edward T. Furlong (efurlong@usgs.gov),USGS, National Water Quality Laboratory

05-02 ♦ February 3, 2005

Revision of the procedure for requesting laboratory matrix spikes
◊ Michael Schroeder (schroede@usgs.gov), (303)236-3270, Analytical Services Program,USGS, National Water Quality Laboratory

05-01 ♦ February 1, 2005

03-01 ♦ February 28, 2003

Data-reporting conventions and implications for interpreting results from custom method 9060 for samples collected from March 1, 1999, to December 31, 1999
◊ Edward T. Furlong, (efurlong@usgs.gov), MRDP, NWQL (303)236-3941, Joel Blomquist, Pesticide National Syntheses Team NWAQA, USGS, Robert J. Gilliom, USGS

02-04 Septemer 23, 2002

Requirements for the proper shipping of samples to the National Water Quality Laboratory
◊ Will Lanier, Chief, Support Services Section, NWQL (303) 236-3710, (wdlanier@usgs.gov)

02-03 ♦ August 12, 2002

02-02 ♦ May 22, 2002

02-01 ♦ April 26, 2002

01-05 ♦ December 26, 2001

Establishment of Long-Term Method Detection Levels for the Analysis of Oil and Grease
◊ Ronald W. Brenton, Analytical Services, NWQL,USGS

01-04 ♦ November 7, 2001

01-03 ♦ April 27, 2001

01-02 ♦ April 1, 2001

Recalculation of bromide concentration (lab code 1246)
◊ Pat Pavelich, Analytical Services Section, NWQL ,USGS

01-01 ♦ May 8, 2001

Elimination of National Water Quality Laboratory Blank Schedule 172 (Effective June 1, 2001)
◊ Glenda E. Brown, Supervisory Chemist, Majors Unit, NWQL, USGS, (303) 236-3160, (gebrown@usgs.gov)

00-07 ♦ October 1, 2000

Elimination of Lead Analysis by Inductively Coupled Plasma-Optical Emission Spectrometry
◊ Edward J. Zayhowski, Supervisory Chemist, Plasma Unit, NWQL

00-06 ♦ October 1, 2000

Elimination of Orthophosphate and Nitrate Analysis by Ion Chromatography
◊ Gary Cottrell, Nutrient Unit Supervisor, Inorganic Program, NWQL (303) 236-3490, (cottrell@usgs.gov)

00-04 ♦ July 25, 2000

00-04S ♦ July 25, 2000 - Supplementary Information

00-03 ♦ March 8, 2000

00-02 ♦ February 17, 2000

00-01 ♦ January 7, 2000

00-01S January 7, 2000 - Supplementary Information

99-10 ♦ December 17, 1999 [Memo distributed March 9, 2000]

99-09 ♦ December 17, 1999 [Memo distributed March 9, 2000]

99-08 ♦ November 1, 1999

Method Change for the Determination of Phytoplankton Biomass
◊ Ronald W. Brenton, Organic Program, National Water Quality Laboratory

99-07 ♦ May 12, 1999

New Analytical Services Request Procedures for National Water-Quality Assessment Program Invertebrate Samples Shipped to the National Water Quality Laboratory
◊ Stephen R. Moulton II, Supervisory Biologist, National Water Quality Laboratory (303) 236-3493 (smoulto@usgs.gov)
◊ Robert S. Williams, Jr, Chief, National Water Quality Laboratory
◊ Timothy L. Miller, Chief, National Water Quality Assessment Program (703) 648-6868 (tlmiller@usgs.gov)

99-06 ♦ July 7, 1999

99-05 ♦ January 7, 1999

Validation of U.S. Environmental Protection Agency (USEPA) method 365.1 to replace U.S. Geological Survey (USGS) TWRI methods I-2607-90 and I-4607-90 for determination of phosphorus in the concentration range from 0.004 to 0.200 mg-P/L.
◊ Juan Vasquez, Supervisory chemist, Nutrients Unit, Inorganic Chemistry Program
◊ Charles Patton, Research Chemist. Methods Research and Development Program, NWQL, (cjpatton@usgs.gov, 303-236-2000)

99-04 ♦ April 8, 1999

99-03 ♦ October 14, 1998

Analysis of Total Phenols
◊ Ronald W. Brenton, Organic Program (303) 236-2000

99-02 ♦ October 6, 1998

Disposal of National Water-Quality Assessment (NAWQA)Program Depositional Targeted Habitat (DTH) benthic macroinvertebrate samples
◊ Timothy L. Miller, Chief, NAWQA, (tlmiller@usgs.gov, 703-648-6868)
◊ Robert S. Williams, Jr., Chief, NWQL,
◊ Stephen R. Moulton, II, Biological Unit Invertebrate Specialist, NWQL (smoulto@usgs.gov, 303-236-2000)

99-01 ♦ October 8, 1998

Change in reporting unit for relative abundances of helium isotopes
◊ L. Niel Plummer, Eastern region Branch of Regional Research (703) 648-5841, (nplummer)
◊ Ann H. Mullin, Analytical Contracting Unit, NWQL, (303) 236-2000 (ahmullin)

98-12 ♦ September 29, 1998

98-11 ♦ September 30, 1998

98-10 ♦ August 12, 1998

National Water Quality Laboratory, Biological Unit availability to process benthic Macroinvertebrate samples for the Water Resources Division
◊ Robert S. Williams, Jr., Chief, NWQL
◊ Timothy L. Miller, Chief, NAWQA, (tlmiller@usgs.gov, 703-648-6868)
◊ Stephen R. Moulton II, BU Invertebrate Specialist, NWQL (smoulto@usgs.gov)
◊ Gary Cottrell, BU Acting Supervisor, NWQL (cottrell@usgs.gov, 303-236-2000)

98-09 ♦ April 30, 1998

Invertebrate Sample Field Processing and Shipment to the NWQL
◊ Timothy L. Miller, Chief, NAWQA, (tlmiller@usgs.gov, 703-648-6868)
◊ Robert S. Williams, Jr., Chief, NWQL

98-08 ♦ September 29, 1998

Change in the Analytical Method Used for the Determination of Inorganic Carbon in Sediment
◊ Ronald W. Brenton, Organic Chemistry Program, NWQL

98-07 ♦ October 1, 1998

Reporting Level Changes for Volatile Organic Compounds (Schedules 2020/2021), Inductively Coupled Plasma-Atomic Emission Spectrometry (ICP-AES), Ammonia plus Organic Nitrogen and Phosphorus (micro-Kjeldahl) in Water Methods at the National Water Quality Laboratory
◊ Bill Foreman, Research Chemist, Methods Research and Development Program, NWQL (wforeman@usgs.gov, 303-236-2000)
◊ Brooke Connor, VOC/Sediment Unit Supervisor, Organic Chemistry Program, NWQL (bfconnor@usgs.gov, 303-236-2000)
◊ Tom Maloney, Chief, Quality Management Program, NWQL

98-06 ♦ April 28, 1998

Elimination of Acrolein from NWQL Schedules 2020, 2021 and Deletion of Schedule 1401
◊ Donna L. Rose, Chemist, Volatiles Unit 303-236-2000, dlrose@usgs.gov
◊ Brooke F. Connor, Supervisory Chemist, Volatiles Unit, Organic Program, 303-236-2000, bfconnor@.usgs.gov

98-05 ♦ December 9, 1997

98-04 ♦ December 9, 1997

98-03 ♦ August 28, 1998 - Revision A

Changes in Reporting Levels and Data Qualifiers for Selected Pesticides and Degradation Products in Schedules 2050 and 2051
◊ Bill Foreman, Methods Research & Development Program, (303) 236-2000, wforeman@usgs.gov,
◊ Bob Gilliom, Chief, NAWQA Pesticide Synthesis Team, (916) 278-3094, rgilliam@usgs.gov

98-03S ♦ August 28, 1998 - Supplementary Information - Revision A

Changes in Reporting Levels and Data Qualifiers for Selected Pesticides and Degradation Products in Schedules 2050 and 2051
◊ Bill Foreman, Methods Research & Development Program, (303) 236-2000, wforeman@usgs.gov,
◊ Bob Gilliom, Chief, NAWQA Pesticide Synthesis Team, (916) 278-3094, rgilliam@usgs.gov

98-02 ♦ December 8, 1997

98-01 ♦ November 10, 1997

Change in Ammonia plus Organic Nitrogen Minimum Reporting Level
◊ Charles J. Patton, Methods Research & Development Program, (303) 236-2000, cjpatton@usgs.gov,
&log; Juan Vasquez, Supervisor, Nutrients Unit

97-12 ♦ August 8, 1997

97-11 ♦ July 29, 1997

New Approved Method for VOCs
◊ Brooke F. Connor, Supervisory Chemist, Volatiles Unit, Organics Program (bfconnor@usgs.gov)

97-10 ♦ June 20, 1997

Change in Ammonia Minimum Reporting Limit
◊ Charles J. Patton, Methods Research & Development Program (303) 236-2000, cjpatton@usgs.gov

97-09 ♦ June 11, 1997

Replacement or Elimination of NWQL Procedures
◊ Peter F. Rogerson, Chief, NWQL
◊ Harold Ardourel, Ass't Chief, Inorganics (ardourel) (303)236-2000
◊ Ralph White, Ass't Chief, Organics

97-08 ♦ April 1, 1997

Changes to the NWQL's Data Formatting and Transmittal Software
◊ Richard A. Husband, Computer Services Unit,
◊ Linda K. Pratt, Chief, Laboratory Operations,

97-07 ♦ March 26, 1997

Replacement Chemical Oxygen Demand Instrumentation Operational
◊ Glenda Brown, Inorganic Program (303) 236-2000 (gebrown@usgs.gov)

97-06 ♦ March 26, 1997

97-05 ♦ February 28, 1997

Using the National Water Quality Laboratory for the analysis of drinking water samples
◊ Al Driscoll (driscoll@usgs.gov);
◊ Carmen Reed-Parker (cgreed@usgs.gov);
◊ Kathy Bryant (kmbryant@usgs.gov), Quality Assurance Unit, (303) 236-2000

97-04 ♦ April 7, 1997

Tritium/helium dating of ground-water samples available through contract with Lamont-Doherty Earth Observatory of Columbia University, Palisades, New York
◊ L. Niel Plummer, Eastern Region Branch of Regional Research, (703) 648-5841, (nplummer@usgs.gov)
◊ Ann Mullin, Chief, Radiochemistry Unit, NWQL (303) 236-2000, (ahmullin@usgs.gov)

97-04S ♦ April 7, 1997 - Supplementary Information

Collection, processing, and analysis of ground-water samples for tritium/helium-3 dating
◊ L. Niel Plummer, Eastern Region Branch of Regional Research, (703) 648-5841, (nplummer@usgs.gov)
◊ Ann Mullin, Chief, Radiochemistry Unit, NWQL (303) 236-2000, (ahmullin@usgs.gov)

97-03 ♦ February 28, 1997

Automated Data Transmission of All 25 Schedule 1379 Pesticides
◊ Jim Madsen, Organic Program (303) 236-2000 (jemadsen@usgs.gov)

97-02 ♦ November 25, 1996

Proposed Replacement or Elimination of NWQL Procedures
◊ Peter F. Rogerson, Chief NWQL

97-01 ♦ November 5, 1996

Use of Syringes to Add Volatile Organic Compounds to Water Samples for Use as Matrix Spike Samples
◊ Mark W. Sandstrom, Chief, Methods Research & Development Program (sandstro@usgs.gov) (303) 236-2000
◊ Bruce R. Darnel, Quality Management Program (brdarnel@usgs.gov) (303) 236-2000

97-01S ♦ November 5, 1996 - Supplementary Information

Use of Syringes to Add Volatile Organic Compounds to Water Samples for Use as Matrix Spike Samples
◊ Mark W. Sandstrom, Chief, Methods Research & Development Program (sandstro@usgs.gov) (303) 236-2000
◊ Bruce R. Darnel, Quality Management Program (brdarnel@usgs.gov) (303) 236-2000

96-12 ♦ September 25, 1996

96-11 ♦ June 6, 1996

Changes in reporting of gross alpha and gross beta results
◊ Ann Mullin, Chief, Radchem Unit (303) 236-2000 (ahmullin@usgs.gov)

96-10 ♦ May 22, 1996

96-09 ♦ May 22, 1996 ♦ SUPERSEDED by NWQL 1996-12 (September 25, 1996)

◊ Changes in reporting of gross alpha and gross beta results
◊ Ann Mullin, Chief, Radchem Unit (303) 236-2000 (ahmullin@usgs.gov)

96-08 ♦ May 22, 1996

96-07 ♦ May 22, 1996

96-06A ♦ April 15, 1996

96-05 ♦ April 5, 1996

Collection, processing, and analysis of carbon isotope samples
◊ Tyler B. Coplen, BRR Reston (tbcoplen@usgs.gov), 703-648-5862
◊ L. Niel Plummer, BRR Reston (nplummer@usgs.gov), 703-648-5841
◊ Ann Mullin, NWQL (ahmullin@usgs.gov), 303-236-2000

96-04 ♦ March 20, 1996

96-03 ♦ March 20, 1996

96-02 ♦ October 23, 1995

Lower Your Costs--Choose the right volatiles schedule.
◊ Brooke F. Connor, Supervisor, Volatiles Unit, Organic Program (bfconnor@usgs.gov)

96-01 ♦ October 23, 1995

Guidelines for Labeling 40-mL Volatiles Sample Vials
◊ Brooke F. Connor, Supervisor, Volatiles Unit, Organic Program (bfconnor@usgs.gov)

95-11 ♦ September 6, 1995

Submission of samples for analysis by the NRP Isotope Tracers Project in Menlo Park
◊ Thomas J. Maloney, Chief, Quality Mgmt. Program, (303) 236-2000
◊ Carol Kendall, Chief, NRP Isotope Tracers Project, (415) 329-4538 ckendall@usgs.gov

95-10 ♦ September 13, 1995

Overview of the QA/QC plan for the Radchem/Stable Isotope contracts at the NWQL
◊ Ann H. Mullin, Supervisory Radchem Unit Chemist, (303) 236-2000, ahmullin@usgs.gov

95-09 ♦ August 25, 1995

Discontinuation Of Automatic Swapping
◊ Linda K. Pratt, Chief, Laboratory Operations, NWQL

95-08 ♦ August 9, 1995

Return and reimbursement for 250-ml FAB teflon bottles in the field.
◊ Harold Ardourel, Acting Assistant Chief, Inorganic Program, NWQL, (303) 236-2000, ardourel@usgs.gov

95-07 ♦ May 25, 1995

Submission of samples for analysis by the NRP Isotope Fractionation Project in Reston
◊ Thomas J. Maloney, Chief, Quality Mgmt. Program, (303) 236-2000
◊ Tyler Coplen, Chief, NRP Isotope Fractionation Project, (703) 648-5862, tcoplen@usgs.gov

95-06 ♦ May 3, 1995

Use of one filtered, acidified (FA) bottle for trace metal and other cations for the inorganic protocol
◊ Harold Ardourel, Assistant Chief, Inorganic Program, (303) 236-2000< ardourel@usgs.gov

95-05 ♦ March 8, 1995

Nitrogen Isotope Sample Preservation for Water Samples
◊ Jeanne Hatcher, Radchem Unit, Quality Management Program, NWQL jhatcher@usgs.gov, 236-2000

95-04 ♦ December 2, 1994 ♦ SUPERSEDED by NWQL 2002-04 (September 23, 2002)

◊ Shipping Samples to the National Water Quality Laboratory
◊ Linda K. Pratt, Chief, Lab Operations, NWQL

95-03 ♦ October 14, 1994

95-02 ♦ October 14, 1994

95-01 ♦ October 14, 1994

National Water Quality Laboratory Alkalinity Reanalysis Policy
◊ James L. Pilon & Kailin Terry, Quality Management Program, NWQL

94-13 ♦ August 25, 1994

94-12 ♦ July 8, 1994

94-11 ♦ May 4, 1994

New prices and lab codes for sulfur isotope (delta-34 S) analysis
◊ Ann Mullin, Radchem Unit, Quality Management Program (ahmullin@usgs.gov) (303) 236-2000

94-10 ♦ April 12, 1994

94-09 ♦ March 4, 1994

Calculation error on mercury bottom material data
◊ Glenda E. Brown (gebrown@usgs.gov) (303) 236-2000

94-08 ♦ March 4, 1994

94-07 ♦ February 10, 1994

94-06 ♦ January 24, 1994

Limitation in the determination of selected carbamate pesticides in water
◊ Bill Foreman (wforeman@usgs.gov), Methods Research & Development
◊ Marvin Fishman

94-05 ♦ January 5, 1994

Availability of a new Analysis for the Quantitation of Glyphosate Herbicide
◊ Mike Schroeder (303) 236-2000 (SCHROEDE)

94-04 ♦ December 30, 1993

94-03 ♦ December 22, 1993

94-02 ♦ December 10, 1993

NWQL Policy on pH Analytical Determinations
◊ Harold Ardourel (303) 236-2000 ardourel@usgs.gov
◊ Thomas J. Maloney

94-01 ♦ October 18, 1993

93-10 ♦ August 25, 1993

Interferences in the Methylene Blue Active Substances [MBAS] Method, Techniques of Water-Resources Investigation [TWRI], [0-311-83], Book 5, Chapter A3.
◊ Mark Burkhardt, Methods Research & Development Program (303) 236-2000 (mrburk@usgs.gov)
◊ Jeff Pritt, Quality Management Group (303) 236-2000 (jwpritt@usgs.gov)

93-09 ♦ August 24, 1993

93-08 ♦ May 26, 1993

New Inorganic Tissue Method
◊ Merle W. Shockey, Inorganic Program Chief (303) 236-2000 (mshockey@usgs.gov)

93-07 ♦ March 15, 1993

93-06 ♦ March 11, 1993

Raising the method detection limit for gross alpha and gross beta
◊ Ann H. Mullin, Radchem Section Chief (303) 236-2000 (ahmullin@usgs.gov)

93-05 ♦ March 10, 1993

93-03 ♦ December 28, 1992 ♦ SUPERSEDED by NWQL 1994-03 (December 22, 1993)

◊ Change in method for the determination of chloride in water due to data quality problems
◊ Charlie Patton (cjpatton@usgs.gov),
◊ Gary Cottrell (cottrell@usgs.gov), and
◊ Jeff Pritt (jwpritt@usgs.gov)

93-02 ♦ October 5, 1992

93-01 ♦ October 5, 1992

Identification of Low Levels of Sodium Contamination in Nitric Acid Samples
◊ Jeff Pritt, Quality Management Group, NWQL (303) 236-2000 (jwpritt@usgs.gov)

92-07 ♦ August 12, 1992

Change of Sample Type Requirement for Ion Chromatography Analysis
◊ Harold Ardourel, Inorganic Program (303) 236-2000 (ardourel@usgs.gov)

92-06 ♦ August 12, 1992 ♦ SUPERSEDED by NWQL 2002-04 (September 23, 2002)

◊ District Rerun Requests
◊ Quality Management Group

92-05 ♦ August 12, 1992

92-04 ♦ August 12, 1992

92-03 ♦ August 12, 1992

92-02 ♦ May 29, 1992

92-01 ♦ March 25, 1992

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