Contents

2.2.2 Cement/Lime Dust
(Reference CH2M HILL SOP HSE&Q-302, Concrete and Masonry)
• Cement/lime dust may be corrosive to moist, damp skin.
• The routes of entry are: skin contact, inhalation, eyes, ingestion.
• Inhalation of cement/line dust may cause sore throat, coughing, choking and dyspnea.
• Treat mild, acute skin contact with soap and water.
• If clothing becomes saturated with wet cement/lime dust, it should be removed and replaced
with clean, dry clothing.
• Gauntlet style work gloves are required to be worn at all times at the site.
• Wear impervious clothing (tyvek or cotton coveralls) with long sleeves and pants to eliminate
skin contact. If walking or working in dry or wet cement kiln dust, wear impervious boots
taped at the top of the pants let to keep dust or liquids from entering the boot.
• Employees must have medical clearance and training in the proper use of respirators if the PEL
and TLC are exceeded.
• Immediately after working with cement kiln dust, workers should clean their skin thoroughly
with soap and water.
2.2.3 Chlorine
(Reference CH2M HILL SOP HSE&Q-505, Chlorine Safety)
CH2M HILL employees who work in proximity to chlorine-related operations must be aware of
safe work practices and site-specific emergency procedures, and take all necessary precautions
associated with avoiding and minimizing chlorine exposure.
• Chlorine is used as a chlorinating and oxidizing agent, disinfectant, and in water and
wastewater treatment. Its appearance is a greenish liquid or gas (it is a gas at normal
temperature and pressure) with a characteristic, penetrating odor;
• It is an irritant, highly corrosive and a strong oxidizer. It poses a hazard to the lungs, eyes and
skin. It is toxic if inhaled, and it is harmful if swallowed. It causes respiratory tract, eye and
skin burns. It can cause lung damage. In extreme cases difficulty in breathing may increase to
the point where death can occur from respiratory collapse or lung failure. Liquid chlorine in
contact with skin or eyes will cause chemical burns and/or frostbite;
• NFPA Ratings: Health – 4; Flammability – 0; Reactivity – 0; Special Hazard Warning –
OXIDIZER;
• The threshold concentrations are (note there are 10,000 ppm in 1% of volume of air):
• Odor 0.3 ppm;
• Irritation 0.5 ppm;
• TLV-8 hours 0.5 ppm;
• PEL-C 1.0 ppm;
• IDLH 10 ppm.
• At the Baton Rouge WWTPs scrubbers are installed, and the chlorine alarms are set as follows:
A-12 GNV310133632156.DOC/090840008