Category Archives: blog

Sediment Sample Collection and Field Screening to Inform NAPL Mobility and Migration Evaluations
Volume 9, Issue 4 | June 2021

| June 30, 2021

Applied NAPL Science Review Sediment Sample Collection and Field Screening to Inform NAPL Mobility and Migration Evaluations  Editor: Lisa Reyenga, PE ANSR Scientific Advisory BoardJ. Michael Hawthorne, PG, Board Chairman, GEI Consultants, Inc.Andrew J. Kirkman, PE, BP Corporation North AmericaRobert Frank, RG, JacobsPaul Cho, PG, CA Regional Water Quality Control Board-LARandy St. Germain, Dakota Technologies, Inc.Dr. Terrence Johnson, USEPABrent… Continue Reading →

Estimating NAPL Hydraulic Conductivity and Migration Rate Based on Laboratory Test Results
Volume 9, Issue 3 | May 2021

| May 18, 2021

Applied NAPL Science Review Estimating NAPL Hydraulic Conductivity and Migration Rate Based on Laboratory Test Results Editor: Lisa Reyenga, PE ANSR Scientific Advisory BoardJ. Michael Hawthorne, PG, Board Chairman, GEI Consultants, Inc.Andrew J. Kirkman, PE, BP Corporation North AmericaRobert Frank, RG, JacobsPaul Cho, PG, CA Regional Water Quality Control Board-LARandy St. Germain, Dakota Technologies, Inc.Dr. Terrence… Continue Reading →

Oil-Particle Aggregates and In Situ Deposited NAPL Sediments
Volume 9, Issue 2 | March 2021

| March 25, 2021

Applied NAPL Science Review Oil-Particle Aggregates and In Situ Deposited NAPL Sediments Editor: Lisa Reyenga, PE ANSR Scientific Advisory Board J. Michael Hawthorne, PG, Board Chairman, GEI Consultants, Inc. Andrew J. Kirkman, PE, BP Corporation North America Robert Frank, RG, Jacobs Paul Cho, PG, CA Regional Water Quality Control Board-LA Randy St. Germain, Dakota Technologies,… Continue Reading →

Evaluating Emplacement and Movement of NAPL in Sediment
Volume 9, Issue 1 | February 2021

| February 22, 2021

Applied NAPL Science Review Evaluating Emplacement and Movement of NAPL in Sediment  Editor: Lisa Reyenga, PE ANSR Scientific Advisory Board J. Michael Hawthorne, PG, Board Chairman, GEI Consultants, Inc Andrew J. Kirkman, PE, BP Corporation North America Robert Frank, RG, Jacobs Paul Cho, PG, CA Regional Water Quality Control Board-LA Randy St. Germain, Dakota Technologies, Inc. Dr. Terrence… Continue Reading →

NAPL Mobility and Migration in Water Body Sediments – Contrasts with Land-Based Soils
Volume 8, Issue 4 | December 2020

| December 29, 2020

Applied NAPL Science Review NAPL Mobility and Migration in Water Body Sediments – Contrasts with Land-Based Soils Editor: Lisa Reyenga, PE ANSR Scientific Advisory Board J. Michael Hawthorne, PG, Board Chairman, GEI Consultants, Inc Andrew J. Kirkman, PE, BP Corporation North America Robert Frank, RG, Jacobs Paul Cho, PG, CA Regional Water Quality Control Board-LA… Continue Reading →

Degassing Method Natural Source Zone Depletion Case Study
Volume 8, Issue 3 | September 2020

| September 29, 2020

Applied NAPL Science Review Degassing Method Natural Source Zone Depletion Case Study  Editor: Lisa Reyenga, PE ANSR Scientific Advisory Board J. Michael Hawthorne, PG, Board Chairman, GEI Consultants, Inc Andrew J. Kirkman, PE, BP Corporation North America Robert Frank, RG, Jacobs Paul Cho, PG, CA Regional Water Quality Control Board-LA Randy St. Germain, Dakota Technologies, Inc…. Continue Reading →

Natural Source Zone Depletion Screening Methodologies
Volume 8, Issue 2 | June 2020

| June 29, 2020

Applied NAPL Science Review Natural Source Zone Depletion Screening Methodologies Editor: Lisa Reyenga, PE ANSR Scientific Advisory Board J. Michael Hawthorne, PG, Board Chairman, GEI Consultants, Inc Andrew J. Kirkman, PE, BP Corporation North America Robert Frank, RG, Jacobs Paul Cho, PG, CA Regional Water Quality Control Board-LA Randy St. Germain, Dakota Technologies, Inc. Dr…. Continue Reading →

Monitored Natural Source Zone Depletion Measurement Frequency
Volume 8, Issue 1 | April 2020

| April 3, 2020

Applied NAPL Science Review Demystifying NAPL Science for the Remediation Manager Editor: Lisa Reyenga, PE ANSR Scientific Advisory Board J. Michael Hawthorne, PG, Board Chairman, GEI Consultants, Inc Andrew J. Kirkman, PE, BP Americas Robert Frank, RG, Jacobs Paul Cho, PG, CA Regional Water Quality Control Board-LA Randy St. Germain, Dakota Technologies, Inc. Dr. Terrence… Continue Reading →

Rate Transient Analysis and Modeling Future Performance
Volume 7, Issue 1 | April 2017

| April 30, 2017

Applied NAPL Science Review Demystifying NAPL Science for the Remediation Manager Editor: J. Michael Hawthorne, PG ANSR Scientific Advisory Board J. Michael Hawthorne, PG, Board Chairman, GEI Consultants, Inc Mark Adamski, PG, Statoil Stephen S. Boynton, PE, LSP, Subsurface Env. Solutions, LLC Dr. Randall Charbeneau, PE, University of Texas Paul Cho, PG, CA Regional Water… Continue Reading →

Estimating Expected Ultimate Recovery
Volume 6, Issue 2 | July 2016

| July 30, 2016

Applied NAPL Science Review Demystifying NAPL Science for the Remediation Manager Editor: J. Michael Hawthorne, PG ANSR Scientific Advisory Board J. Michael Hawthorne, PG, Board Chairman, GEI Consultants, Inc Mark Adamski, PG, Statoil Stephen S. Boynton, PE, LSP, Subsurface Env. Solutions, LLC Dr. Randall Charbeneau, PE, University of Texas Paul Cho, PG, CA Regional Water… Continue Reading →

Natural Source Zone Depletion Rate Assessment
Volume 6, Issue 1 | May 2016

| May 30, 2016

Download PDF Applied NAPL Science Review Demystifying NAPL Science for the Remediation Manager Editor: J. Michael Hawthorne, PG Asst. Editor: Dr. Rangaramanujam Muthu, PE ANSR Scientific Advisory Board J. Michael Hawthorne, PG, Board Chairman, GEI Consultants, Inc Mark Adamski, PG, Statoil Stephen S. Boynton, PE, LSP, Subsurface Env. Solutions, LLC Dr. Randall Charbeneau, PE, University… Continue Reading →

The Mobile NAPL Interval, Part 2: Confined and Perched LNAPL
Volume 5, Issue 4 | December 2015

| December 30, 2015

Download PDF Applied NAPL Science Review Demystifying NAPL Science for the Remediation Manager Editor: J. Michael Hawthorne, PG Asst. Editor: Dr. Rangaramanujam Muthu, PE ANSR Scientific Advisory Board J. Michael Hawthorne, PG, Board of Chairman, GEI Consultants Inc. Mark Adamski, PG, BP Americas Stephen S. Boynton, PE, LSP, Subsurface Env. Solutions, LLC Dr. Randall Charbeneau,… Continue Reading →

Mobile NAPL Interval Pt 1: Unconfined LNAPL
Volume 5, Issue 3 | Nov 2015

| November 30, 2015

Download PDF Applied NAPL Science Review Demystifying NAPL Science for the Remediation Manager Volume 5, Issue 3, November 2015 Editor: J. Michael Hawthorne, PG Asst. Editor: Dr. Rangaramanujam Muthu, PE ANSR Scientific Advisory Board J. Michael Hawthorne, PG, Board of Chairman, GEI Consultants Inc. Mark Adamski, PG, BP Americas Stephen S. Boynton, PE, LSP, Subsurface… Continue Reading →

Measuring LNAPL Degradation Rates using CO2 Flux Methods
Volume 5, Issue 2 | July 2015

| July 30, 2015

Download PDF Applied NAPL Science Review Demystifying NAPL Science for the Remediation Manager Editor: J. Michael Hawthorne, PG Asst. Editor: Dr. Rangaramanujam Muthu ANSR Scientific Advisory Board J. Michael Hawthorne, PG, Board of Chairman, GEI Consultants Inc. Mark Adamski, PG, BP Americas Stephen S. Boynton, PE, LSP, Subsurface Env. Solutions, LLC Dr. Randall Charbeneau, University… Continue Reading →

Calculating Mole Fractions from LNAPL and Soil Samples
Volume 5, Issue 1 | March 2015

| March 30, 2015

Download PDF Applied NAPL Science Review Calculating Mole Fractions from LNAPL and Soil Samples Editor: J. Michael Hawthorne, PG Asst. Editor: Dr. Rangaramanujam Muthu ANSR Scientific Advisory Board J. Michael Hawthorne, PG, Board of Chairman, GEI Consultants Inc. Mark Adamski, PG, BP Americas Stephen S. Boynton, PE, LSP, Subsurface Env. Solutions, LLC Dr. Randall Charbeneau,… Continue Reading →

Redevelopment of LNAPL Sites with Deed Restrictions
Volume 4, Issue 4 | November 2014

| November 30, 2014

Download PDF Applied NAPL Science Review Demystifying NAPL Science for the Remediation Manager Editor: J. Michael Hawthorne, PG Asst. Editor: Dr. Rangaramanujam Muthu ANSR Scientific Advisory Board J. Michael Hawthorne, PG, Board of Chairman, GEI Consultants Inc. Mark Adamski, PG, BP Americas Stephen S. Boynton, PE, LSP, Subsurface Env. Solutions, LLC Dr. Randall Charbeneau, University… Continue Reading →

Calculating NAPL Drawdown
Volume 4, Issue 3 | September 2014

| September 30, 2014

Download PDF Applied NAPL Science Review Demystifying NAPL Science for the Remediation Manager Editor: J. Michael Hawthorne, PG Asst. Editor: Dr. Rangaramanujam Muthu ANSR Scientific Advisory Board J. Michael Hawthorne, PG, Board of Chairman, GEI Consultants Inc. Mark Adamski, PG, BP Americas Stephen S. Boynton, PE, LSP, Subsurface Env. Solutions, LLC Dr. Randall Charbeneau, University… Continue Reading →

Filtering Baildown Test Data
Volume 4, Issue 2 | March 2014

| March 30, 2014

Download PDF Applied NAPL Science Review Demystifying NAPL Science for the Remediation Manager Editor: J. Michael Hawthorne, PG Asst. Editor: Dr. Rangaramanujam Muthu ANSR Scientific Advisory Board J. Michael Hawthorne, PG, Board of Chairman, GEI Consultants Inc. Mark Adamski, PG, BP Americas Stephen S. Boynton, PE, LSP, Subsurface Env. Solutions, LLC Dr. Randall Charbeneau, University… Continue Reading →

Site Wide Analysis of LNAPL Distribution and Hydrogeologic Conditions Using Plume Scale Diagnostic Gauge Plots
Volume 4, Issue 1 | January 2014

| January 30, 2014

Download PDF Applied NAPL Science Review Demystifying NAPL Science for the Remediation Manager Editor: J. Michael Hawthorne, PG Asst. Editor: Dr. Rangaramanujam Muthu ANSR Scientific Review Board J. Michael Hawthorne, PG, Board of Chairman, GEI Consultants Inc. Mark Adamski, PG, BP Americas Stephen S. Boynton, PE, LSP, Subsurface Env. Solutions, LLC Dr. Randall Charbeneau, University… Continue Reading →

LNAPL Body Stability, Part 2: Daughter Plume Stability via Spatial Moments Analysis
Volume 3, Issue 5 | September 2013

| September 30, 2013

Download PDF Applied NAPL Science Review Demystifying NAPL Science for the Remediation Manager Editor: J. Michael Hawthorne, PG Asst. Editor: Dr. Rangaramanujam Muthu ANSR Scientific Review Board J. Michael Hawthorne, PG, Board of Chairman, GEI Consultants Inc. Mark Adamski, PG, BP Americas Stephen S. Boynton, PE, LSP, Subsurface Env. Solutions, LLC Dr. Randall Charbeneau, University… Continue Reading →

LNAPL Body Stability, Part 1: Lines of Evidence
Volume 3, Issue 4 | May 2013

| May 30, 2013

Download PDF Applied NAPL Science Review Demystifying NAPL Science for the Remediation Manager Editor: J. Michael Hawthorne, PG Asst. Editor: Dr. Rangaramanujam Muthu ANSR Scientific Review Board J. Michael Hawthorne, PG, Board of Chairman, GEI Consultants Inc. Mark Adamski, PG, BP Americas Stephen S. Boynton, PE, LSP, Subsurface Env. Solutions, LLC Dr. Randall Charbeneau, University… Continue Reading →

LNAPL Transmissivity from Total Fluids Recovery Data, Part 2: Application and Interpretation of Results
Volume 3, Issue 3 | April 2013

| April 30, 2013

Download PDF Applied NAPL Science Review Demystifying NAPL Science for the Remediation Manager Editor: J. Michael Hawthorne, PG Asst. Editor: Dr. Rangaramanujam Muthu ANSR Scientific Review Board J. Michael Hawthorne, PG, Board of Chairman, GEI Consultants Inc. Mark Adamski, PG, BP Americas Stephen S. Boynton, PE, LSP, Subsurface Env. Solutions, LLC Dr. Randall Charbeneau, University… Continue Reading →

LNAPL Transmissivity from Total Fluids Recovery Data, Part 1: Calculation Methodology
Volume 3, Issue 2 | February 2013

| February 15, 2013

Download PDF Applied NAPL Science Review Demystifying NAPL Science for the Remediation Manager Editor: J. Michael Hawthorne, PG Asst. Editor: Dr. Rangaramanujam Muthu ANSR Scientific Review Board J. Michael Hawthorne, PG, Board of Chairman, GEI Consultants Inc. Mark Adamski, PG, BP Americas Stephen S. Boynton, PE, LSP, Subsurface Env. Solutions, LLC Dr. Randall Charbeneau, University… Continue Reading →

Manual Skimming Testing to Measure LNAPL Transmissivity
Volume 3, Issue 1 | January 2013

| January 30, 2013

Download PDF Applied NAPL Science Review Demystifying NAPL Science for the Remediation Manager Editor: J. Michael Hawthorne, PG Asst. Editor: Dr. Rangaramanujam Muthu ANSR Scientific Review Board J. Michael Hawthorne, PG, Board of Chairman, GEI Consultants Inc. Mark Adamski, PG, BP Americas Stephen S. Boynton, PE, LSP, Subsurface Env. Solutions, LLC Dr. Randall Charbeneau, University… Continue Reading →

API LNAPL Transmissivity Spreadsheet: A Tool for Baildown Test Analysis
Volume 2, Issue 6 | November 2012

| November 30, 2012

Download PDF Applied NAPL Science Review Demystifying NAPL Science for the Remediation Manager ANSR Scientific Review Board J. Michael Hawthorne, PG, Board of Chairman, GEI Consultants Inc. Mark Adamski, PG, BP Americas Dr. Randall Charbeneau, University of Texas Dr. Sanjay Garg, Shell Global Solutions (US) Inc. Dr. Terrence Johnson, USEPA Andrew J. Kirkman, PE, BP… Continue Reading →

LIF Primer II: Interpreting Waveforms
Volume 2, Issue 5 | July 2012

| July 30, 2012

Download PDF Applied NAPL Science Review Demystifying NAPL Science for the Remediation Manager ANSR Scientific Review Board J. Michael Hawthorne, PG, Board of Chairman, GEI Consultants Inc. Mark Adamski, PG, BP Americas Dr. Randall Charbeneau, University of Texas Dr. Sanjay Garg, Shell Global Solutions (US) Inc. Dr. Terrence Johnson, USEPA Andrew J. Kirkman, PE, AECOM… Continue Reading →

Mechanisms for LNAPL to Enter Confined Conditions
Volume 2, Issue 4 | June 2012

| June 30, 2012

Download PDF Applied NAPL Science Review Demystifying NAPL Science for the Remediation Manager ANSR Scientific Review Board J. Michael Hawthorne, PG, Board of Chairman, GEI Consultants Inc. Mark Adamski, PG, BP Americas Dr. Randall Charbeneau, University of Texas Dr. Sanjay Garg, Shell Global Solutions (US) Inc. Dr. Terrence Johnson, USEPA Andrew J. Kirkman, PE, AECOM… Continue Reading →

LNAPL Natural Source Zone Depletion, Part 2
Volume 2, Issue 3 | April 2012

| April 30, 2012

Download PDF Applied NAPL Science Review Demystifying NAPL Science for the Remediation Manager ANSR Scientific Review Board J. Michael Hawthorne, PG, Board of Chairman, GEI Consultants Inc. Mark Adamski, PG, BP Americas Dr. Randall Charbeneau, University of Texas Dr. Sanjay Garg, Shell Global Solutions (US) Inc. Dr. Terrence Johnson, USEPA Andrew J. Kirkman, PE, AECOM… Continue Reading →

LNAPL Natural Source Zone Depletion, Part 1
Volume 2, Issue 2 | February 2012

| February 15, 2012

Download PDF Applied NAPL Science Review Demystifying NAPL Science for the Remediation Manager ANSR Scientific Review Board J. Michael Hawthorne, PG, Board of Chairman, GEI Consultants Inc. Mark Adamski, PG, BP Americas Dr. Randall Charbeneau, University of Texas Dr. Sanjay Garg, Shell Global Solutions (US) Inc. Dr. Terrence Johnson, USEPA Andrew J. Kirkman, PE, AECOM… Continue Reading →

Conversion of TPH to NAPL Saturation
Volume 2, Issue 1 | January 2012

| January 30, 2012

Download PDF Applied NAPL Science Review Demystifying NAPL Science for the Remediation Manager ANSR Scientific Review Board J. Michael Hawthorne, PG, Board of Chairman, GEI Consultants Inc. Mark Adamski, PG, BP Americas Dr. Randall Charbeneau, University of Texas Dr. Sanjay Garg, Shell Global Solutions (US) Inc. Dr. Terrence Johnson, USEPA Andrew J. Kirkman, PE, AECOM… Continue Reading →

Residual, Mobile and Migrating LNAPL
Volume 1, Issue 10 | December 2011

| December 30, 2011

Download PDF Applied NAPL Science Review Demystifying NAPL Science for the Remediation Manager ANSR Scientific Review Board J. Michael Hawthorne, PG, Board of Chairman, GEI Consultants Inc. Mark Adamski, PG, BP Americas Dr. Randall Charbeneau, University of Texas Dr. Sanjay Garg, Shell Global Solutions (US) Inc. Dr. Terrence Johnson, USEPA Andrew J. Kirkman, PE, AECOM… Continue Reading →

Laser Induced Fluorescence Primer
Volume 1, Issue 9 | September 2011

| September 30, 2011

Download PDF Applied NAPL Science Review Demystifying NAPL Science for the Remediation Manager ANSR Scientific Review Board J. Michael Hawthorne, PG, Board of Chairman, GEI Consultants Inc. Mark Adamski, PG, BP Americas Dr. Randall Charbeneau, University of Texas Dr. Sanjay Garg, Shell Global Solutions (US) Inc. Dr. Terrence Johnson, USEPA Andrew J. Kirkman, PE, AECOM… Continue Reading →

Building the NAPL Conceptual Site Model
Volume 1, Issue 8 | August 2011

| August 30, 2011

Download PDF Applied NAPL Science Review Demystifying Science for the NAPL Site Manager ANSR Scientific Review Board J. Michael Hawthorne, PG, Board of Chairman, GEI Consultants Inc. Mark Adamski, PG, BP Americas Dr. Randall Charbeneau, University of Texas Dr. Sanjay Garg, Shell Global Solutions (US) Inc. Dr. Terrence Johnson, USEPA Andrew J. Kirkman, PE, AECOM… Continue Reading →

LNAPL Transmissivity
Volume 1, Issue 7 | July 2011

| July 30, 2011

Download PDF Applied NAPL Science Review (ANSR) Demystifying NAPL Science for the Remediation Manager Review Board: J. Michael Hawthorne, PG, Board of Chairman, GEI Consultants, Inc. Mark Adamski, PG, BP America Dr. Randall Charbeneau, University of Texas Dr. Sanjay Garg, Shell Global Solutions (US) Inc. Dr. Terrence Johnson, United States Environmental Protection Agency Andrew Kirkman,… Continue Reading →

Perched LNAPL
Volume 1, Issue 6 | June 2011

| June 30, 2011

Download PDF Applied NAPL Science Review (ANSR) Demystifying NAPL Science for the Remediation Manager Review Board: J. Michael Hawthorne, PG, Board of Chairman, GEI Consultants, Inc. Mark Adamski, PG, BP America Dr. Randall Charbeneau, University of Texas Dr. Sanjay Garg, Shell Global Solutions (US) Inc. Dr. Terrence Johnson, United States Environmental Protection Agency Andrew Kirkman,… Continue Reading →

Confined LNAPL
Volume 1, Issue 5 | May 2011

| May 30, 2011

Download PDF Applied NAPL Science Review (ANSR) Demystifying NAPL Science for the Remediation Manager Review Board: J. Michael Hawthorne, PG, Board of Chairman, GEI Consultants, Inc. Mark Adamski, PG, BP America Dr. Randall Charbeneau, University of Texas Dr. Sanjay Garg, Shell Global Solutions (US) Inc. Dr. Terrence Johnson, United States Environmental Protection Agency Andrew Kirkman,… Continue Reading →

Discharge vs. Drawdown Graphs
Volume 1, Issue 4 | April 2011

| April 30, 2011

Download PDF Applied NAPL Science Review (ANSR) Demystifying NAPL Science for the Remediation Manager Review Board: J. Michael Hawthorne, PG, Board of Chairman, GEI Consultants, Inc. Mark Adamski, PG, BP America Dr. Randall Charbeneau, University of Texas Dr. Sanjay Garg, Shell Global Solutions Dr. Terrence Johnson, United States Environmental Protection Agency Andrew Kirkman, PE, AECOM… Continue Reading →

Hydrostratigraphs
Volume 1, Issue 3 | March 2011

| March 30, 2011

Download PDF Applied NAPL Science Review (ANSR) Demystifying NAPL Science for the Remediation Manager Review Board: J. Michael Hawthorne, PG, Board of Chairman, GEI Consultants, Inc. Mark Adamski, PG, BP America Dr. Randall Charbeneau, University of Texas Dr. Sanjay Garg, Shell Global Solutions Dr. Terrence Johnson, United States Environmental Protection Agency Hydrostratigraphs Flexible CSM Visualization… Continue Reading →

Diagnostic Gauge Plots
Volume 1, Issue 2 | February 2011

| February 12, 2011

Download PDF Applied NAPL Science Review (ANSR) Demystifying NAPL Science for the Remediation Manager Review Board: J. Michael Hawthorne, PG, Board of Chairman, GEI Consultants, Inc Mark Adamski, PG, BP America Andrew Kirkman, PE, AECOM Diagnostic Gauge Plots Simple Yet Powerful LCSM Tools J. Michael Hawthorne, P.G. GEI Consultants, Inc. How do you know if… Continue Reading →

LNAPL Thickness Revitalized
Volume 1, Issue 1 | January 2011

| January 30, 2011

Download PDF Applied NAPL Science Review Demystifying NAPL Science for the Remediation Manager LNAPL Thickness Revitalized How useful is LNAPL Thickness? You may be surprised at the answer. Light Non-Aqueous Phase Liquid (LNAPL) Thickness has come and gone and come again as an inexpensive yet surprisingly sophisticated LNAPL Conceptual Site Model (LCSM) tool. But what… Continue Reading →

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