Resource Geoscience Inc. in Colorado Springs, Colo., specializes in environmental assessment, compliance, and remediation services. One contract involves cleaning guano, half-dead pigeons, and maggots from the roofs of car washes and service stations before the debris clogs gutters. Besides harnesses and hard hats, the men wear full Tyvek suits and full face respirators because of the health hazards associated with pigeons. Suit sleeves are duct-taped around surgical-type gloves, followed by removable rubber.Owner Tom Lewis and crew were cleaning guano one 80-degree day using a King Vac industrial vacuum loader from Keith Huber Inc. At that altitude, the machine produces 3,700
