oronoco outfall remediation project progress report...backfilling of clean sand in progress. dredge...

City of Alexandria, Virginia

Oronoco Outfall Remediation Project

Progress Report

March 5, 2018

Alexandria Town Gas Site

2

1930s

Oronoco St. today

Oronoco OutfallAt foot of Oronoco St.

Area Overview

3

Lee St. SquareFormer ATG site

Robinson Terminal

Oronoco Outfall

Voluntary Remediation Program

(VRP)

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-Boom installed at the Oronoco St. storm sewer outfall.

-Free Product Recovery wells installed

-Oronoco St. Storm Sewer Pipe relined

-BioSparge Groundwater Treatment System installed

-Dredging and Capping project.

Dredge and Capping Project

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▪ 3000 CY of contaminated sediment

dredged and removed.

Dredge and Capping Project

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▪ Backfilling of clean sand in progress.

Dredge and Capping Project

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▪ Reactive cap to be installed around the

Oronoco St. storm sewer outfall.

Storm Sewer Pipe Repair

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Anticipated to be completed in March, 2018.

Project Schedule

9

Contacts:

Tafesse T. Gyes, P.E.

Department of Project Implementation

City of Alexandria, Virginia

703.746.4051

Lisa Goldberg

Office of Environmental Quality

City of Alexandria, Virginia

Telephone: 703. 746.4076

Questions

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