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Attachment B, Technical Revision to the May Day Mine Permit, September 12, 2009. 6 of 35 <br />Sodium Carbonate, Anhydrous (497-19-8) <br />Date: 01/2612004 <br />POTENTIAL HEALTH EFFECTS: Direct contact with the product causes irritation of <br />the eyes and continuous contact may cause skin irritation (red, dry, cracked skin). Excessive levels of <br />airborne dust may irritate the mucous membranes and upper respiratory tract. <br />3. COMPOSITION / INFORMATION ON INGREDIENTS <br />Chemical Name CAS# [Wt .% EC No. EC Class <br />Sodium carbonate 497-19-8 99.8 207-838-8 Xi, R36 <br />4. FIRST AID MEASURES <br />EYES: Immediately flush with water for at least 15 minutes, lifting the upper and lower eyelids <br />intermittently. See a medical doctor or ophthalmologist as necessary. <br />SKIN: Wash with plenty of soap and water, Get medical attention if irritation occurs and persists. <br />INGESTION: Rinse mouth with Water. Dilute by Hiving I or 2 glasses of water. Do not induce <br />vomiting. Never give anything by mouth to an unconscious person. See a medical doctor immediately. <br />INHALATION: Remove to fresh arr. If breathing difficulty or discomfort occurs and persists, obtain <br />medical attention. <br />NOTES TO MEDICAL DOCTOR: While internal toxicity is low, irritant effects of high <br />concentrations may produce corneal opacities, and vesicular skim reactions in humans with abraded skin <br />only. Treatment is symptomatic and supportive. <br />5. FIRE FIGHTING MEASURES <br />EXTINGUISHING MEDIA: water, eater fog, carbon dioxide (CO,), dry chemical <br />FIRE / EXPLOSION HAZARDS: Not applicable <br />FIRE FIGHTING PROCEDURES: Wear full protective clothing and self-contained <br />breathing apparatus. <br />FLAMMABLE LIMITS: Not applicable <br />HAZARDOUS COMBUSTION PRODUCTS: Fumes ofsodium oxide. <br />Page 2 of 10