VERTEX
Environmental Inc.
Case Study
PCP & CCA
OVERVIEW
Vertex Environmental Inc. staff conducted a remedial program for groundwater impacted by
pentachlorophenol (PCP) and copper, chromium and arsenic (CCA) at a site in central Canada.
Historical use of the wood treatment compounds including PCP and CCA resulted in groundwater
impacts to a shallow unconfined aquifer. The plume covered an area of approximately 2,000 m2 and
represented a threat to the ecology of the area. A remedial system based on sequential in-situ chemical
reduction and in-situ enhanced bioremediation was implemented to address the plume.
PROGRAM
Ø Compounds of Concern
o Pentachlorophenol
o Petroleum Hydrocarbons
o Chromium (VI), Copper and Arsenic
Ø Geology - Fill & Glacial Till
Ø Sequential Treatment Zone
o Chemical Reduction for CCA
o Zero-Valent Iron & Organic Carbon
o Enhanced Bioremediation
o Oxygen Releasing Devices
Ø Treatment time frame
o > 10 years
Within 3 months of installation of the sequential reactive zones installation, PCP, CCA and PHC
concentrations at down gradient wells decreased to below the applicable drinking water standards and
were maintained for the 7 year monitoring period. The system was designed and installed for less than
$500,000 which represented a savings of over $300,000 compared to traditional pump and treat.
Operation and maintenance costs were estimated to be 8% of the cost of pump and treat.
1000
1 Metre Down Gradient of Reactive Zones
Concentration (ug/L)
Concentration (ug/L)
1 Metre Down Gradient of Reactive Zone
1000
100
10
PCP
PHC
1
Cr(VI)
Cu
As
100
10
1
0
10
20
30
Month Since Installation
40
0
10
20
30
40
Month Since Installation
Vertex combines strong theorical understanding with practical experience to properly plan and
implement the right remedial program for your site. Selecting Vertex to undertake your remediation
project allows you to access a wealth of experience and knowledge.
For more information contact
519.653.8444 www.vertexenvironmental.ca