Detailed Stratigraphic Logging Enhances Thermal Remedy at New - - PowerPoint PPT Presentation

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Detailed Stratigraphic Logging Enhances Thermal Remedy at New - - PowerPoint PPT Presentation

May 04, 2023 170 likes •404 views

Detailed Stratigraphic Logging Enhances Thermal Remedy at New England Superfund Site Mike Apfelbaum , Cathy Rockwell, Peter Nangeroni, Samantha Olney, & Ben Gregory (Woodard & Curran) Renee Pineo, Robin Swift, Steffen Nielsen, & Gorm

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SLIDE 1

COMMITMENT & INTEGRITY DRIVE RESULTS

Detailed Stratigraphic Logging Enhances Thermal Remedy at New England Superfund Site

Mike Apfelbaum, Cathy Rockwell, Peter Nangeroni, Samantha Olney, & Ben Gregory (Woodard & Curran) Renee Pineo, Robin Swift, Steffen Nielsen, & Gorm Heron (TerraTherm)

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SLIDE 2

COMMITMENT & INTEGRITY DRIVE RESULTS

Overview

  • Site Description
  • Conceptual Site Model
  • Remedy Description & Design
  • Pilot Testing
  • Logging Program
  • Full-Scale (Phase 1)
  • Remedy Progress
  • Shutdown Criteria
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SLIDE 3

COMMITMENT & INTEGRITY DRIVE RESULTS

Site Description

Site Location

Former er Waste O e Oil Disposal / / Recy ecycl cling Facil ilit ity

Lagoon Area

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SLIDE 4

COMMITMENT & INTEGRITY DRIVE RESULTS

CSM – Lagoon Area

Landfill Lagoon ASTs UST

  • LNAPL Smear Zone
  • AVOCs
  • CVOCs

Lagoon

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SLIDE 5

COMMITMENT & INTEGRITY DRIVE RESULTS

Remedy

  • SVE/Thermal Remedy
  • ROD COCs – CVOCs, naphthalene
  • Majority of mass in LNAPL smear zone (18-26 ft bgs)
  • ROD stipulated SVE with thermal enhancement
  • Thermal required for naphthalene

Courtesy of TerraTherm Inc.

Using ng S Steam E Enha nhanc nced Extract ction ( (SEE)

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SLIDE 6

COMMITMENT & INTEGRITY DRIVE RESULTS

Target Treatment Zone (TTZ)

  • Horizontal: soil COCs < ROD

levels (v. conservative)

  • Vertical: non-uniform, overall

10-26 ft bgs

5,750 750 yd yd3 treated v vs. 13 13,270 270 yd yd3 hea eated ed

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SLIDE 7

COMMITMENT & INTEGRITY DRIVE RESULTS

TTZ Hydrogeology

Impl plications ns for S SEE EE Remedy

  • Notable soil heterogeneities
  • Wet, oil-stained fill material typically found

between 8 and 10 ft bgs

  • Thin clay lens found between 16 and 22 ft bgs
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SLIDE 8

COMMITMENT & INTEGRITY DRIVE RESULTS

SEE Modeling

Outputs: 1:10 10 to

  • 1:30

30 for

  • r r

range of

  • f

anisot

  • trop
  • py
  • Modeling used to predict steam behavior
  • Used to evaluate Anisotropy of subsurface soils

Temps > 100˚C S t e a m I n j

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SLIDE 9

COMMITMENT & INTEGRITY DRIVE RESULTS

SEE Pilot Test

Test Objective

1.

Confirm steam injection rates and pressures;

2.

Assess shape and extent of subsurface steam “front”;

3.

Compare field vs. modeled data to recommend/verify anisotropy ratios Test Overview

  • 2 test networks: varying geology

& contaminant distribution

  • Steam injected between 2-3 zones
  • Limited Duration: 90 hours
  • Low potential for mass movement
  • No liquid/vapor recovery

Sand – High K

(2-well) ll)

Lagoon Liner – Var. K

(3-well) ll)

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SLIDE 10

COMMITMENT & INTEGRITY DRIVE RESULTS

Pilot Test Results

Temp Profile: Sand – High K (2-well cluster)

Implications: 1. Steam from deep zone found its way upward 2. Geologic heterogeneities present 3. Demonstrated low temp response in shallow soils

…Heterogeneities

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SLIDE 11

COMMITMENT & INTEGRITY DRIVE RESULTS

Pilot Test Results

Sh Shallo llow & & Intermediate

Bes est F Fit it Deep Bes est F Fit it

Design Implications

  • Steam easily injected under

low pressures

  • As result of heterogeneities:
  • More temp monitoring points
  • Deep steam well screens

extended 2-feet

  • Incorporate detailed

stratigraphic logging program

  • Potential focused heating in

select sub-areas

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SLIDE 12

COMMITMENT & INTEGRITY DRIVE RESULTS

Phase 1 Full-Scale

  • 186 steam wells to inject average of 6,600 lbs steam per hour
  • 31 Multi-phase extraction wells (MPEs) to recover NAPL,

groundwater & vapor

  • Real-time subsurface temperature logging (38 locations)
  • Duration est.150 total days (17.8 mil lbs of steam or 2.1 mil gal

water as steam)

Go Goal is s to achieve t temperatures >90 90̊C

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SLIDE 13

COMMITMENT & INTEGRITY DRIVE RESULTS

Soil Logging

Sampling Protocol

  • Sonic drilling used
  • Combination of bagged

soils and macro- classification

  • Focus on smear zone soils

(16-26’)

  • Steam injection intervals
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SLIDE 14

COMMITMENT & INTEGRITY DRIVE RESULTS

Soil Logging

Key Parameters Logged

  • Observation of clay / low permeability zones
  • Transitions/contacts
  • Maximum PID reading and corresponding depth
  • LNAPL presence (smear zone)

C-F Sa Sand Si Silty Sa Sand Heterogeneities Easily Discerni nibl ble F-M Sa Sand Clayey- Sa Sand

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SLIDE 15

COMMITMENT & INTEGRITY DRIVE RESULTS

Heating Trends – Day 14

Not

  • table

Differences in Wellfield Heatup (NW vs

  • vs. SE)
  • Perimeter

Heatup Only

  • Temps > 90˚C at

5 TMPs

  • North side of TTZ
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SLIDE 16

COMMITMENT & INTEGRITY DRIVE RESULTS

  • Temp. vs Stratigraphy

TMP-21 [NW] TMP-18 [SE]

  • Clay 8" thick

at 21 ft bgs. C-F Sand (upper 15’) F-M Sand (lower 15’)

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SLIDE 17

COMMITMENT & INTEGRITY DRIVE RESULTS

Heating Trends – Day 27

  • Start of interior steam injection
  • Temps > 90˚C at 14 locations

TTZ 90˚C Goal

Challenges Presented by Heterogeneities Overcome by Effective Steam Injection Program

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SLIDE 18

COMMITMENT & INTEGRITY DRIVE RESULTS

Heating Trends – Day 47

TTZ 90˚C Goal

  • Continue interior steam injection
  • Temps > 90˚C at 17 locations
  • Temps in NW areas remain greater
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SLIDE 19

COMMITMENT & INTEGRITY DRIVE RESULTS

Shutdown Criteria

  • Soil sampling used to determine remedy effectiveness (Interim &

Final)

  • Triggered by “diminishing returns” (% mass removed,

temperatures >90̊C)

  • Supported by other lines of evidence (wellfield GW, LNAPL,

vapor)

  • Contingency for focused steam injection points during operation

in areas where heat is lagging

Realize benefit t to u understanding heterogeneities pr prior t to he heating ng

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SLIDE 20

COMMITMENT & INTEGRITY DRIVE RESULTS

Summary

In a n ant nticipa pation n of subs bsurface he heterogene neities and nd potentia ial f for dif ifferentia ial heatin ing detail iled so soil il l loggin ing suppo pported:

  • Early identification of low permeability soil zones – during site

investigation, pilot testing and full scale construction

  • Opportunity to enhance evaluation of real-time temperature

profiles

  • Steam injection

enhancements based on temperature response to variable lithologies

  • Review of logged soils to

identify compliance sampling locations & evaluate consistency

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SLIDE 21

COMMITMENT & INTEGRITY DRIVE RESULTS

THANK YOU!

QUESTIONS?

Mike Apfelbaum, P.G. Woodard & Curran Andover, MA mapfelbaum@woodardcurran.com (o) 978 557 8150

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SLIDE 22

COMMITMENT & INTEGRITY DRIVE RESULTS

Heating Trends – System Restart

Temp Shutdown Re-Start Temp Shutdown Re-Start

  • Focused steam injection in 2 areas
  • Interior – Deep steam (30-32 ft)
  • SE Corner – Intermediate steam

(18-20 ft) Rapid d Temperature Response