A contractor asks its CGL insurer to include a hostile fire exception in the total pollution exclusion endorsement. This endorsement will retain coverage for losses that meet certain requirements. These requirements include all of the following EXCEPT:
a. The loss arises from smoke, fumes, or vapors caused by a hostile fire.
b. The site from which the hostile fire emanates is not, and has never been, used to treat or store waste.
c. The contractor's operations are not remedial in nature.
d. The source of the fire is flammable materials from a job site that stored nuclear waste