Heavy Metal Hazardous Waste Disposal Site Octavius V Catto School - - PowerPoint PPT Presentation

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Heavy Metal Hazardous Waste Disposal Site Octavius V Catto School - - PowerPoint PPT Presentation

Feb 21, 2023 324 likes •856 views

Delineation, Remediation and Redevelopment of a Heavy Metal Hazardous Waste Disposal Site Octavius V Catto School Redevelopment Project Camden, New Jersey J. Stuart Wiswall, P.G., LSRP Keating Environmental Management, Inc. Community

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Delineation, Remediation and Redevelopment of a Heavy Metal Hazardous Waste Disposal Site

Octavius V Catto School Redevelopment Project Camden, New Jersey

  • J. Stuart Wiswall, P.G., LSRP

Keating Environmental Management, Inc.

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SLIDE 2

Key Elements

  • f the Project
  • Community Revitalization Effort Involving the

Collaboration of Public/Private/Regulatory Stakeholders

  • Redevelopment of a Failing Apartment

Complex with a Community Park

  • Utilized the Triad Approach for Site

Assessment

  • Remediation of a Former Pond Used for

Hazardous Waste Disposal and Filled Wirh Historic Fill

  • On-site Stabilization of Hazardous Waste

Prior to Off-site Disposal

  • Engineering and Institutional Controls

Employed to Manage Residual Contamination

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SLIDE 3

Site History and Setting

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SLIDE 4

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1898 Topographic Map

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1940 Aerial Photograph

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1963 Aerial Photograph

Adjacent Pigment Manufacturing Site

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SLIDE 7

1967 Aerial Photograph

Apartment Complex Constructed

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SLIDE 8

E

2005 Abandoned Manufacturing Plant

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Site Plan

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E

2009 Building G – Upper Pond Area

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E

2009 Building S On Edge of Buried Pond

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2009 Repaired Settlement Cracks

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Remedial Objectives

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Remedial Objectives

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  • Remove Hazardous Waste
  • Protect Groundwater Quality
  • Eliminate Direct Exposure Pathway
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SLIDE 15

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Site Characterization

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SLIDE 16

Triad Approach

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  • Systematic Project Planning
  • Dynamic Work Plan
  • Real Time Measurement Technologies
  • GPR/EM
  • Downhole Conductivity Probe
  • X-Ray Fluorescence
  • On-site Laboratory
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SLIDE 17

GPR/EM Survey

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Downhole Conductivity Probe

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SLIDE 19

Typical Conductivity Log In From Pond

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1 10 100 1000 10000 5 10 15 20 25 Conductivity (mS/m) Depth (feet)

Historic Fill

Sludge

Peat/Sand

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SLIDE 20

Limits of Historic Fill And Pond Pond Sludge

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SLIDE 21

Identified Contaminants

  • f Concern
  • Historic Fill
  • Benzo(a)anthracene (46 mg/kg), Lead (6,700

mg/kg), Zinc (21,000 mg/kg)

  • Sludge
  • Lead (47,000 mg/kg total, 130 ug/L TCLP)
  • Ground Water
  • Arsenic (18 ug/L), Cadmium (12 ug/L),

Chromium (330 ug/L), Lead (67 ug/L), Cyanide (1,570 ug/L)

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SLIDE 22

Contaminants of Concern

  • TCLP analysis; lead leached above

the toxic characteristic hazardous waste threshold in some sludge samples

  • SPLP Analysis: Potential for lead

and arsenic to leach from fill above GWQS

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SLIDE 23

Remedial Approach

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  • Excavate/Stockpile Historic Fill
  • Dewater Pond, Treat Groundwater and

On-site Infiltration

  • Excavate Sludge, Stabilize, Off-site

Disposal

  • Install Clean Soil Buffer, Place Historic

Fill, Install Clean Soil Cap

  • Establish Ground Water Classification

Area and Deed Notice

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SLIDE 24

S Remediation

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SLIDE 25

Remediation Steps

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  • Building Decontamination and Removal
  • Foundation Removal
  • Excavation/Stockpiling of Historic Fill

from Pond Area

  • Excavation and Stabilization of Sludge
  • Install Clean Soil Buffer
  • Replace Historic Fill
  • Install Cap
  • Establish CEA
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SLIDE 26

February 2005

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SLIDE 27

Removing Foundations

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Bottles in Foundation Concrete

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Dewatering Wells Installed

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Water Treatment System

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Historic Fill Excavation From Pond

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RRetaining Wall

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Paint Waste in Historic Fill

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Historic Fill Stockpile

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Pond Sludge Layer

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Excavating Sludge

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Sludge Treatment Area

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A Part of the Treatment Area

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Pigment Layering in Sludge

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Pond Bottom

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Confirmation Sampling of Pond Bottom

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Placing Clean Soil Buffer

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SLIDE 43

Waste Stabilization

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  • Stabilization Chemical - Inorganic Mixture of

Magnesium Oxide and Calcium Phosphate

  • Attempt to use phosphoric acid-based product

unsuccessful; Reaction generated H2S

  • Pre-remediation bench testing to determine

treatment ratio for lead

  • Composite sampling of each waste pile to

determine lead concentration

  • Product delivered in bulk and mixed with excavator
  • Post treatment composite sampling to verify results
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SLIDE 44

Chemical Delivery

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Mixing Chemical

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Treatment Near Completion

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Non-Hazardous Waste Transported Off Site

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Placing Fill in Excavation

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Separation Fabric between Fill and CAP

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Stockton Station Park

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Questions?

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Contact Information

Name: Stuart Wiswall, P.G., LSRP Keating Environmental Management, Inc. Phone: 484-876-2197 E-mail: swiswall@kempartners.com

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THANK YOU