Over 200 years of on-site chemical manufacturing
Multi-component DNAPL present at fill-native clay interface
Current Status
Results
Primary injection reduced subsurface COC mass by 64%
Secondary Injections destroyed over 311,000 lbs. of DDT, DDX, CB, BCEE (reduced COC mass by 67%) in 4.5 months - URS data
The total DNAPL mass destroyed was over 305,000 lbs.
3 grams COC removal per gram Cool-Ox® (slightly better than predicted by bench study!)
Download The Full Case Study
Site History
Over 200 years of on-site chemical manufacturing
Multi-component DNAPL present at fill-native clay interface
Chlorinated Contaminants & Mass Concentrations as % of Total COCs
Initial Bench Study
Cool-Ox® Selected:
Both Cool-Ox® and heat activated sodium persulfate achieved >80% COC destruction
Cool-Ox® was selected as the oxidizing and reducing agent because no activation was required.
Supplementary Bench Scale Test
Selectivity of ISCO/ISCR treatment? Or
Distribution of alkanes in fine-grain matrix?
What about dose-response?
Optimum pH 8-9.5
Dose Response
WORKING SAFELY
9,020 safe work hours under adverse weather conditions (snow/sleet) and subzero temperatures
Incident-free completion
“Outstanding achievement! An unannounced internal audit with nothing but positive findings!
This is a true demonstration of your strong EH&S culture and leadership.
Thank you all for living and working safely!”
- EH&S Remediation Manager - Global Remediation Business
PILOT DEMONSTRATION RESULTS
Relative Mass Relationships Before & After Pilot Primary COCs Before Reduced by Chlorobenzenes: 51% 73% Total DDX: 34% 86% 1,2-Dichloropropane: 8% 72%
FULL-SCALE TREATMENT
As designed:
1,766 injection points on 6’x6’ grid
First dosing rate selected based on chemical costs and field mobilization costs
First dosing aimed at 80% COC mass removal at locations with 7,500 mg/kg COC or less
Field results indicated reagent dosage rates limited by subsurface acceptance