Contents

• Do not work on scaffolds covered with snow, ice, or other slippery material or work on
scaffolds during storms or high winds unless personal fall arrest systems or wind screens are
provided and the competent person determines it is safe to remain on the scaffold.
2.2.23 Sewage/Biosolids
Although CH2M HILL employees are not expected to come in direct contact with sewage, staff may
be downwind from biosolids spraying operations. Biosolids can contain bacteria, viruses, protozoa,
and helminthes (parasitic worms), all of which can cause disease. Fecal coliform and other
pathogens associated with sewage and biosolids are usually associated with self-limited
gastrointenstinal illness.
There is also the potential for the presence of Hepatitis A virus. Exposure to Hepatitis A virus
through ingestion of dust could occur from high airborne levels of particles, or accumulations of
dust on surfaces that are subsequently transferred from hand to mouth.
Employees working on this project will be offered a Hepatitis A vaccination. A Hepatitis A
vaccination fact sheet from the CH2M HILL Occupational Physician is included in Attachment 4,
and a Hepatitis A fact sheet from the CDC is included in Attachment 5.
Tetanus vaccines are also offered to CH2M HILL employees who work around and are exposed to
raw sewage. Therefore, it is recommended that project personnel have a current tetanus
vaccination.
The following basic hygiene and safety practices are required for workers handling or exposed to
biosolids.
• Wash hands thoroughly with soap and water after contact with biosolids.
• Avoid touching face, mouth, eyes, nose, genitalia, or open sores and cuts while working with
biosolids.
• Wash your hands before you eat, drink, smoke and before and after using the bathroom.
• Eat in designated areas away from biosolids handling activities.
• Do not smoke or chew tobacco or gum while working with biosolids.
• Use barriers between skin and surfaces exposed to biosolids.
• Remove excess biosolids from footgear prior to entering a vehicle or a building.
• Keep wounds covered with clean, dry bandages.
• Flush eyes thoroughly, but gently, if biosolids contact eyes.
• Change into clean work clothing on a daily basis and reserve footgear for use at work site or
during biosolids transport.
• Do not wear work clothes home or outside the work environment.
• Use gloves to prevent skin abrasion
2.2.24 Stairways & Ladders
(Reference CH2M HILL SOP HS-214, Stairways and Ladders)
• Stairway or ladder is generally required when a break in elevation of 19 inches or greater exists.
• Personnel should avoid using both hands to carry objects while on stairways; if unavoidable,
use extra precautions.
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