1

REMEDIATION UPDATEPETERS CARTRIDGE SITE | KINGS MILLS, OH | SEPTEMBER 2016

THANK YOU FOR YOUR SUPPORT!In this final edition of the Peters Cartridge project newsletter, we would like to extend a sincere thank you to each

partner listed below as our remediation activities near completion. Throughout our project, the Peters Cartridge Site Remediation Team’s primary focus has been workplace safety and remediating the site with the utmost professionalism and attention to detail. Collectively you have made this success possible and we are greatly

appreciative of everyone’s dedicated support.

AECOM-Cincinnati

Bowser Morner

Tim Coletta

Deerfield Township FD

Evans Land Clearing

Golder & Associates

Hamilton Township - Gary Boeres

Hamilton Township PD

Hamilton Township FD

Little Miami Conservancy

Mark Henry - Eastside Printing

Ohio Department of Natural Resources

Ohio Environmental Protection Agency

Summit Contracting

U.S. Environmental Protection Agency

Warren County Water & Sewer

Warren County Engineers

Waste Management

Copyright © 2016 DuPont or its affiliates. All rights reserved. The DuPont Oval Logo, DuPont™ are registered trademarks or trademarks of E. I. du Pont de Nemours and Company or its affiliates.

Revegetated slope and installed erosion controls west of building R-9.

2

DID YOU KNOW?The current shot tower at the Peters Cartridge site was the second tower to be constructed on the property. In fact, the first shot tower was constructed entirely of wood in 1895 and demolished in 1916 to make way for the tower that stands today. At a height of approximately 220 feet, the existing shot tower is one of the most compelling focal points of the site and was critical to the plant’s manufacturing processes and production of munitions.

TRAIL UPDATE

With Peters Cartridge site remediation drawing to a close and all barriers removed, the section of the Little Miami State Park trail between mile markers 35.0 and 35.5 is unimpeded and open for recreational activities. We have no expectation there will be any further need to close the trail as a result of cleanup activities. Before you proceed with plans to use the trail, it is always a good idea to contact the trail hotline at 513-552-7030 and/or the Little Miami State Park website at www.littlemiamistatepark.org for current information.

FINALREMEDIATION ACTIVITIESIn September, we experienced favorable weather conditions which allowed us to push toward the finish line of our remediation project. The project team completed several important tasks last month, including:

• Completed final grading work and placement of backfill.

• Seeded, mulched and placed erosion control fabric in areas where final grading was completed.

• Restored slope behind building R-2.

• Repaired and conducted maintenance of temporary erosion controls.

• Sampled and pumped water from consolidation cell sump as needed and managed water in accordance with environmental regulations.

• Installed monitoring wells and protective posts around MW-17 and MW-18.

• Submitted revised Phase II Revegetation Plan to U.S. EPA for comment and opened bid process for project, which is scheduled to begin before the end of this fall.

Performed slope restoration activities behind building R-2.

Restored and seeded slope with erosion controls and installed mulch behind building R-2.

3

SAFETY TIPAs winter approaches and cold temperatures loom, winterizing your home can save you money and assure if severe weather strikes you are prepared to protect your most important investment and keep your family safe.

Winterizing is generally easy and inexpensive, as it saves on utility bills and keeps unwelcome critters out. In addition, it stops much of the structural damage that can occur from freezing pipes, roof leaks and other issues.

Most effective weatherproofing jobs can be completed without professional help and do not require one to have “handyman” skills. By taking any or all of the actions below – before the snow flies – you’ll be saving yourself from a number of potential problems.

• Clean gutters and downspouts to remove leaves and other debris that can become wet and freeze, weighing down your gutters to the point they could separate from the house.

• Replace your furnace filter so it runs more efficiently.• Close any vents in your home that may have been opened for warm weather.• Disconnect hoses from outside faucets and turn off water flow to those pipes at the source

(usually next to a water heater). This will help prevent pipes from freezing and rupturing.• Buy a snow shovel and other winter supplies before the inclement weather hits.• Keep extra water and canned food in storage in case heavy snowfall causes power outages

and prevents you from leaving your home for an extended period.• Keep ample supplies of dry firewood or commercially produced fire logs for heating and

cooking in your fireplace if power is interrupted.

WORKING SAFELY48,280 SAFE WORK HOURS

As previously noted, safety has been a top priority from day one of our remediation project. No deadline, task or project goal is as important as assuring our employees and contractors can complete assigned activities while being protected from harm. We have a very exacting set of safety regulations that must be followed by all workers at all times and the record of the Peters Cartridge Site Remediation Team proves these rules work. Through September 2016, our crew has a perfect score, spanning 48,280 work hours without an incident. The combination of leadership that is committed to safety 100% of the time and our workers who follow guidelines to the letter, deserve all the credit for this significant achievement.

Installed new monitoring well and protective posts.

4

SITE PROGRESS

CONTACTSEric Mysona, Project Manager – Parsonseric.mysona@parsons.com513-552-7009 (Office)513-368-9213 (Mobile)

2443 Crowne Point DriveSharonville, OH 45241

Cathie Barton, DuPont Catherine.A.Barton@dupont.com302-996-8354

Cory Stewart, Cookerly Public Relationscory@cookerly.com404-419-9231

Follow DuPont Operations on Twitterhttps://twitter.com/DuPont_NAOps

For Trail UpdatesPlease continue to visit the Little Miami State Parkwww.littlemiamistatepark.orgCall 24/7 “Trail Hotline” phone number: 513-552-7030

Copyright © 2016 DuPont or its affiliates. All rights reserved. The DuPont Oval Logo, DuPont™ are registered trademarks or trademarks of E. I. du Pont de Nemours and Company or its affiliates.

Installed geogrid and strip drains as part of slope restoration work behind building R-2.