Using Ultraviolet- Induced Fluorescence to Enhance an LNAPL - - PowerPoint PPT Presentation

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Using Ultraviolet- Induced Fluorescence to Enhance an LNAPL - - PowerPoint PPT Presentation

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Using Ultraviolet- Induced Fluorescence to Enhance an LNAPL Conceptual Site Model Bobbilynne Koepke, RG & Daniel Yoakum Environmental Works, Inc. MWCC Environmental Conference 2018 July 17, 2018 1 Using Ultraviolet-Induced Fluorescence

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SLIDE 1

Using Ultraviolet- Induced Fluorescence to Enhance an LNAPL Conceptual Site Model

Bobbilynne Koepke, RG & Daniel Yoakum Environmental Works, Inc. MWCC Environmental Conference 2018

July 17, 2018 1

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SLIDE 2

Using Ultraviolet-Induced Fluorescence to Enhance an LCSM

  • Technology introduction and background
  • Technology Uses
  • Case Study
  • Background and Initial LCSM
  • LNAPL fluorescence work
  • Updated LCSM and outcome
  • Summary

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SLIDE 3

Technology Introduction

  • LNAPL fluorescence

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*photos courtesy of Geoprobe and Dakota Technologies

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Technology Introduction

  • Fluorescence logging tools

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Technology Introduction

  • DPT tooling

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Technology Uses

  • Timely LNAPL characterization
  • Quickly document general soil type
  • Quicker understanding of LNAPL lateral distribution
  • Help select soil sample locations
  • Real-time field decisions
  • Enhance remedial design

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SLIDE 7

Case Study

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Case Study

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Case Study

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Case Study

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Case Study

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Case Study

  • LCSM Summary
  • Lithology is silty clay/loam that grades vertically to sand
  • Groundwater is present at 3-7 ft bls, which results in confining

conditions for a majority of the time

  • Two documented gasoline releases
  • LNAPL mass is primarily present at 5-8 ft bls
  • Some mobile LNAPL is present, but not migrating
  • No risk from LNAPL at the site
  • LNAPL recovery efforts resulted in recovering approximately 200

gallons of LNAPL and nearly 5,000 gallons of impacted water

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Case Study

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Case Study

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Case Study

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Case Study

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Case Study

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Case Study

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Case Study

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Case Study #2 – Fuel Oil Site

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  • Power Plant near Kansas City
  • Fuel discovered in onsite

pond – old French drain 25 ft bgs

  • Limited excavation, line

cleaning, and camera could not identify source

  • Large volume of

underground pipelines and utilities

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Case Study - OIP

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  • EWI used in-

house GPR with Line Trac to locate product lines and depths

  • Advanced OIP

along the possible leaking lines

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Case Study - OIP

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Case Study - OIP

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Same boring, different depths

  • Optical shows clean

sandy fill @ 7.2 ft bgs

  • Fluorescence at 7.8 ft bgs
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Case Study - OIP

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Separate borings

  • Top left shows optical

when fill around product line was encountered (no LNAPL)

  • Bottom shows UV

fluorescence in fill material at 5.8 ft bgs

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Case Study - OIP

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  • EWI was able to find

general source area in 1 day

  • Borings advanced

adjacent to OIP boreholes to collect soil samples and confirm results

  • OIP borings also ID’d

diesel fuel in the soils along a water line corridor

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Summary

  • LNAPL fluorescence logging is a proven technology

with years of experience

  • Help understand LNAPL distribution in real-time
  • Get quick snapshot of soil lithology with EC sensor
  • Help target soil sampling horizons
  • Important part of LCSM
  • Direct remedial design and approach
  • Can be very cost effective tool in project lifecycle
  • EWI can implement with OIP and Geoprobe

equipment

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Questions?

Bobbilynne Koepke, RG Daniel Yoakum Environmental Works, Inc. 417-890-9500 bkoepke@environmentalworks.com dyoakum@environmentalworks.com

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