**Endorsement for Nuclear Operations**

This endorsement is for the following described policy and takes effect and expires concurrently with said policy:

- **Policy No.:** ROU 9433884
- **Company:** Continental Casualty Co.
- **Issued To:** International Business Machines Corp., et al.
- **Endorsement No.:** 10
- **Effective Date:** 11/1/67

The endorsement covers operations involving nuclear materials, including:

1. Equipment or devices designed or used for:
   - Separating the isotopes of plutonium or uranium (235)
   - Placing in, using, or handling spent fuel
   - Handling, processing, or storing waste

2. Any equipment or device used for the processing, fabricating, or allowing of special nuclear material at any time the amount of such material in the custody of the insured at the premises where such equipment or device is located exceeds more than 25 grams of plutonium or uranium 235 or any combination thereof, or more than 350 grams of uranium 238.

3. Any structure, barn, excavation, premises, or place provided or used for the storage or disposal of waste and includes the site on which any of the foregoing is located, or operations conducted on such site and all premises used for operations.

"Special nuclear material" means any apparatus designed or used to sustain nuclear fission in a self-supporting chain reaction or to form critical mass of fissile material.

With respect to injury to or destruction of property, the word "injury" or "destruction" includes all forms of radioactive contamination of property.

This endorsement forms a part of and is for attachment to the following described policy and takes effect and expires concurrently with said policy.