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Note: In general, noise levels in excess of 85 dBA interfere with communication between two individuals speaking in a normal tone of voice at a distance of 3-feet from one another. 3.4 Biological Hazards Type(s)/Source: Poison oak, biting insects & vectors; e.g., mosquitoes and animals Qualified Exposure Risk: Low Hazard Control: • Isolation(Attention to detail—avoidance) • PPE(Gloves/boots/long-sleeve shirts) Hazard: Contact with plants, insects, and animals likely to be present at the site should be avoided. Plants such as poison oak or ivy can cause an allergic reaction and skin rash in some individuals. Stinging and biting insects, including bees, spiders, and ticks, can cause extreme discomfort and/or serious allergic responses. Insect bites are generally not dangerous, unless they are from a poisonous insect. The primary concern with animal bites and scratches is the potential for infection and/or rabies. Snakebites or scorpion stings can also be dangerous, but more from infection or trauma than the toxins injected by the snake or scorpion. Control (s): Before beginning fieldwork each day, observe the work area for the potential presence of poisonous plants and inhabitant reptiles and take measures necessary to minimize the potential for contact. Specially prepared topical barriers, such as Teknu®, for protection against poison oak and insect repellent containing approximately 50% DEET for protecting exposed skin from biting insects; apply insect repellent sparingly to exposed skin. These products are commercially available and may minimize the potential for development of skin rashes and/or irritations due to such exposures. NOTE: Avoid contacting plastic zippers or other plastic closure mechanisms on clothing, equipment bags, etc., with DEET containing creme which will cause these materials to degrade. If unprotected contact with potentially poisonous plants does exist, wash with soap and water as soon as possible. If irritation still develops, apply First Aid and/or seek medical attention, accordingly. If you are allergic to bee or wasp stings, be sure to have the appropriate first aid available (e.g., an epi- pen) on the project. If you are stung, administer first aid and seek immediate medical attention. Be sure a reptile or animal bite victim obtains medical attention quickly if a bite or scratch occurs, especially if there is a potential that it was poisonous. In the meantime, administer First Aid by scrubbing the wound with soap and water, and rinsing thoroughly under running water. Dry off and place a clean bandage on the wound. Victims of these bites should lie down and remain calm and motionless; cold packs should be applied and medical attention sought immediately. 3.5 Chemical Hazards Stockton 6-Lane,Task Order No.82 Caltrans Contract 06A1141,EA 10-03A1001 Project No.S9200-06-82 - 8- December 2009