Hidden Dangers in Debris To the Editor: Several years ago, our company in upstate New York purchased the Paslode impulse nail gun. It was quite a tool and everybody was happy [with it], especially nailing rafters. But there is a downside to gas cartridge-fired hand tools. Even though we all have tried to be careful and cautious, mistakes do happen. As we were building an addition on the shores of the Hudson River, the usual construction debris began to pile up. It was our impression that the excavator or owner would arrange for removal of this debris to the landfill. An unsuspecting excavator hauled the material to the dump only to find they wanted all the debris separated into metals,