Hardeman County Landfill

Background Current

◦ Phase II◦ Bio-reactor

Future◦ Funding◦ Publications◦ Next Phase

Overview

Memphis /

Shelby Co.

Jackson

Landfill

Boliver

Site Location

Velsicol Chemical – Disposal of industrial waste from 1964 to 1973

Estimated 130,000 to 300,000 barrels of waste Waste was dumped in unlined trenches in sand hills Contamination to domestic wells was reported by

residents and confirmed in 1978 Site added to EPA NPL in 1983 Pump and treat system installed in 1996 and operated

until 2003. Declared failed remediation.

Background

Phase 2 (2010 - 2011) – identify sources of contamination to tributaries, evaluation of contaminant transport and attenuation through wetland, evaluate sites for enhanced remediation

What to find…

Landfill

Clover Creek

Pugh

Cre

ek

Wetlands

middle tributary

westtributaries

Areas of Release to Environment (groundwater discharge)

1. Wetland – seeps and distributed sources of contaminants to wetland and small streams

2. Tributary streams – some point location and possible distributed source of contaminants; contaminant transport to wetland.

3. Pugh Creek – distributed and point location with high level of contaminants

1

2

3

Pugh

Cre

ek

middle tributary

Clover Creek

west tributaries

5,000 ug/L

50 ug/L

500 ug/L

5,000 ug/L

Groundwater Plume

Carbon Tetrachloride

Plume from Environ, 2008

Maximum concentration > 35, 0000 ug/L

Decreases to ND at boundary streams

ND

ND

ND

ND

ND

Bio-Reactor

Plywood Dam

Hardwood Mulch & Limestone Gravel mixture

16ft Bio-Reactor

Bio-Reactor

Inlet

Outlet

Inlet Hardwood Mulch & Limestone Gravel mix

Outlet

Notched Dam

Bio-Reactor Sketch

16ft

Reactor Results for Carbon tetrechloride

Funding Bio-reactor locations Submitting PUBLISHED reports

◦ Data & Interpretive

Looking Ahead

Questions????