D MATERIAL SAFETY DATA SHEET Page 1 of 7 SECTION 1 - CHEMICAL PRODUCT AND COMPANY IDENTIFICATION

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1 D MATERIAL SAFETY DATA SHEET Page 1 of 7 SECTION 1 - CHEMICAL PRODUCT AND COMPANY IDENTIFICATION MSDS PREPARED BY: Environmental Health Dept.-Grace Construction Products W.R.Grace & Co.-Conn. Grace Canada, Inc. 62 Whittemore Ave. 294 Clements Rd. West Cambridge, MA Ajax, Ontario, L1S 3C6 Telephone Number for Information and Emergency Response In USA: (617) In Canada: (905) MSDS Number: D Cancels MSDS # D Date: 01/10/2005 Trade Names and Synonyms: (SEE SECTION 16 FOR ADDITIONAL PRODUCT IDENTIFICATION) Chemical Names and Family: FORCE 10,000 D Condensed Amorphous Silica Fume High Strength Concrete Additive Product Use: Formula: SiO 2 CAS# (Chemical Abstract Service): SECTION 2 - HAZARDOUS INGREDIENT AND MAJOR COMPONENT INFORMATION (See Section 11 for Complete Chemical Names) EXPOSURE LIMITS (See Section 8 for Canadian Limits) Max. % Exposure Limits INGREDIENT: By Wt.. OSHA ACGIH OTHER QUARTZ (CRYST. SILICA) 0.50 PEL/TWA 0.1mg/m 3 TLV/TWA 0.1 mg/m 3 NIOSH CAS# as respirable dust as respirable dust 0.05 mg/m 3 as respirable dust SILICA, FUME mg/m3 TWA TLV/TWA: 10mg/m CAS# (As Total Dust) (Total Dust) TLV/TWA: 2mg/m 3 (Respirable Dust) SECTION 3 - HAZARDS IDENTIFICATION Emergency Overview: Warning Statements: WARNING! MAY CAUSE IRRITATION.... Contains Condensed Silica Fume CAS# and small amounts of oxides and salts of Al, Fe, Mg, Ca, Na and K. May contain Quartz (crystalline silica) CAS# at less than 0.5%.... Inhalation of dust may cause respiratory irritation resulting in coughing, sneezing and other nuisance symptoms.... Eye contact may cause slight physical or mechanical irritation.... Prolonged or repeated use may cause skin irritation and dryness.... Long-term exposure to airborne respirable Quartz (crystalline silica) dust can decrease lung function and create risk of silicosis, pneumoconiosis, lung cancer and other lung disease.... Read and understand all Health and Safety information on the product Label and Material Safety Data Sheet before use. 3024f NPCA-HMIS Hazard Index: o Health: 2 * o Flammability: 1 o Reactivity: 0

2 D MATERIAL SAFETY DATA SHEET Page 2 of 7 o Personal Protection: E (See Section 8) Potential Health Effects Routes of Exposure: Inhalation: This product contains micron-sized particles which can become airborne. Exposure to excessive airborne dust may cause irritation to the respiratory system resulting in coughing or sneezing, shortness of breath and wheezing. Inhalation may also aggravate chronic respiratory conditions such as asthma or bronchitis. Long-term exposure to respirable Quartz (crystalline silica) dust can decrease lung function and create risk of silicosis, pneumoconiosis, lung cancer and lung disease. Skin and Eye: Excessive dust may cause unpleasant deposit in eyes and cause irritation if rubbed. Fine powder may block pores in skin leading to irritation or skin rash. May also cause drying of the skin which can result in dermatitis. Ingestion: Oral toxicity is low and, therefore, not expected to be harmful if swallowed in small amounts. Carcinogenicity Information: Crystalline silica has been classified as a probable human carcinogen (Group 1) by the International Agency for Research on Cancer (IARC). The National Toxicology Program (NTP) has concluded that respirable crystalline silica is "reasonably anticipated to be a carcinogen" (N2) based on sufficient animal and limited human data. The substance is also recognized by OSHA as a carcinogen. SECTION 4 - FIRST AID MEASURES EYE: In case of contact, immediately flush with plenty of water. Consult a physician if irritation develops and persists. SKIN: In case of contact, wash with soap and water. INHALATION: If inhaled, get fresh air. If symptoms develop and persist, consult a physician. INGESTION: If swallowed, do not induce vomiting. Give victim a glass of water. Consult a physician. Never give anything by mouth to an unconscious person.

3 D MATERIAL SAFETY DATA SHEET Page 3 of 7 SECTION 5 - FIRE FIGHTING MEASURES Flash Point: Method Used: LEL None UEL None N.F.P.A. Rating: H-1 F-1 R-0 Extinguishing Media Special Fire Fighting Procedures None Unusual Fire and Explosion Hazards Dry powdered materials can build static electrical charges when subject to friction. SECTION 6 - ACCIDENTAL RELEASE MEASURES U.S. RELEASES Observe precautions noted above. Collect using methods which minimize creating dust and place in suitable containers for recycle or disposal. CANADIAN RELEASES Observe precautions noted above. Collect using methods which minimize creating dust and place in suitable containers for recycle or disposal. SECTION 7 - HANDLING AND STORAGE INFORMATION Precautionary Measures:... Avoid creating dust.... Equip mixers and hoppers with dust covers.... Provide ventilation and respiratory protection.... Avoid contact with skin and eyes.... Wear skin and eye protection to avoid contact with dust.... FOR PROFESSIONAL USE ONLY. KEEP OUT OF CHILDREN'S REACH. 3025f SECTION 8 - EXPOSURE CONTROLS/PERSONAL PROTECTION/CANADIAN EXPOSURE LIMITS Ventilation: Local Exhaust: Exhaust fans may be necessary in enclosed areas. Mechanical: Exhaust fans may be necessary in enclosed areas. Special: Other: Respiratory Protection: Respiratory protection is recommended if dust is created while handling this product. A NIOSH-approved particulate respirator is mandatory if ventilation and engineering controls cannot prevent exposure above the limits specified in Section 2 of the MSDS. Silica fume has micron-sized particles. If irritation or breakthrough occurs while using a standard particulate respirator, a respirator of higher efficiency is suggested. 3026f

4 D MATERIAL SAFETY DATA SHEET Page 4 of 7 Skin Protection: Cotton or leather work gloves are normally appropriate. If irritation is noted, impervious gloves should be worn. Eye Protection: Safety goggles are recommended to prevent exposure if excessive airborne dust is created. Other Protective Clothing or Equipment: Normal work clothes. Work/Hygienic Practices: Use bag opening and disposal procedures which minimize dust release. SECTION 8 - EXPOSURE CONTROLS/PERSONAL PROTECTION/CANADIAN EXPOSURE LIMITS (Cont'd) Provincial Exposure Limits Ingredients ACGIH ALBERTA B.C. ONTARIO QUEBEC TLV/TWA: OEL/TWA: PC/TWA: TWAEV: AC: SILICA FUME: 2mg/m TOTAL DUST: 10mg/m 3 10mg/m 3 10mg/m 3 10mg/m 3 10mg/m 3 - RESPIRABLE DUST: --- 5mg/m 3 20mg/m 3 15 min mg/m 3 QUARTZ 0.1mg/m 3 TWA 0.1mg/m mg/m 3 0.1mg/m 3 TWAEV 0.1mg/m 3 (Crystalline Silica) 8 hr OEL 8 hr OEL 0.2mg/m 3CEV 8 hr 1623f SECTION 9 - PHYSICAL AND CHEMICAL PROPERTIES Boiling Point: Specific Gravity(H2O=1) Not Applicable Vapor Pressure (mm Hg.) % Volatiles None Vapor Density(AIR = 1) Evaporation Rate (Butyl Acetate = 1) Solubility in Water: Negligible ph 5-7 (Solution) Bulk Density (#/cu. ft): Appearance and Odor: Light to dark grey powder. Earthy odor. Odor Threshold:

5 D MATERIAL SAFETY DATA SHEET Page 5 of 7 SECTION 10 - STABILITY AND REACTIVITY Stable under normal conditions (yes or no): YES Conditions or Materials to avoid (which may react or cause instability): None Known Hazardous Decomposition or Byproducts: Product does not decompose. Hazardous Polymerization: Will Not Occur Conditions to Avoid: SECTION 11 - TOXICOLOGICAL INFORMATION INGREDIENT TOXICITY DATA: LD50 & LC 50 (Chemical Name, CAS#, & Common Name) (See Section 2 for Exposure Limits) Silica, Fume LD50 (oral, rat) 3160mg/m 3 CAS# Quartz (Crystalline Silica) CAS# No Toxicity Data Available 1622f SECTION 12 - ECOLOGICAL INFORMATION None Available At This Time SECTION 13 - DISPOSAL CONSIDERATIONS U.S. DISPOSAL This product contains trace quantities of lead and other heavy metals. Due to the variable lead content, this product must be tested prior to disposal. If a representative sample is not tested, you must assume that this product has a RCRA Classification of Lead Toxicity with the EPA Hazardous Waste Number D0008. EP TOXICITY TEST SUMMARY (MG/LITER) SILVER BARIUM CADIUM CHROMIUM LEAD RANGE <0.01-< <0.01-<0.1 < EPA MAX ARSENIC SELENIUM MERCURY RANGE <0.01-<0.3 < EPA MAX Consult all regulations (federal, state, provincial, local etc.)or a qualified waste disposal firm when characterizing waste for disposal. Dispose of waste in accordance with all applicable regulations.

6 D MATERIAL SAFETY DATA SHEET Page 6 of 7 CANADIAN DISPOSAL Consult all regulations (federal, state, provincial, local etc.)or a qualified waste disposal firm when characterizing waste for disposal. Dispose of waste in accordance with all applicable regulations. SECTION 14 - TRANSPORT INFORMATION Transportation Hazard Classification United States DOT Canadian Regulations PROPER SHIPPING: TDG CLASS: Nonhazardous NAME HAZARD CLASS: Nonhazardous IDENTIFICATION #: LABEL(s) REQUIRED: Surface Freight Classification: SILICA, N.O.I. SECTION 15 - REGULATORY INFORMATION SARA Title III Reporting Information Tier I & II Hazard Categories: (Not Meant To Be All Inclusive Selected Regulations Represented) IMMEDIATE (ACUTE) HEALTH Contains Extremely Hazardous-SARA III Section 302 Ingredient: Comments: NO Contains Toxic Chemical Release-SARA III Section 313 Ingredient: NO Comments: Other Government Reporting Requirements: CHEMICAL INVENTORY CERTIFICATION: All ingredients contained in this product are included on the US EPA Substance Control Act (TSCA) inventory or exempt from listing on the TSCA Inventory. All ingredients contained in this product comply with the requirements of the Canadian Environmental Protection Act (CEPA) and are listed on the Domestic Substance List (DSL). CERCLA/SARA SECTION 304 EMERGENCY RELEASE NOTIFICATION: NOT APPLICABLE Some chemicals may have state regulated reportable quantities which are more stringent than Federal requirements. Due to the complex and dynamic nature of these regulations, it is not possible to provide a complete summary. You should contact the Environmental Compliance Coordinator in your company or the appropriate Department of Environmental Protection if product is released to land or water. CALIFORNIA PROPOSITION 65 INFORMATION: WARNING! This product contains chemicals known to the State of California to cause cancer, birth defects or other reproductive harm.

7 D MATERIAL SAFETY DATA SHEET Page 7 of 7 WHMIS CLASS: D-2A This product has been classified in accordance with the hazard criteria of the controlled produces regulation (CPR). This MSDS contains all the information required by the CPR. 3027f Nonhazardous Ingredient Disclosure: SECTION 16 - OTHER INFORMATION The information contained in this Material Safety Data Sheet is applicable to the following products: FORCE 10,000 D "THE DATA INCLUDED HEREIN ARE PRESENTED IN ACCORDANCE WITH VARIOUS ENVIRONMENT, HEALTH AND SAFETY REGULATIONS. IT IS THE RESPONSIBILITY OF A RECIPIENT OF THIS DATA TO REMAIN CURRENTLY INFORMED ON CHEMICAL HAZARD INFORMATION, TO DESIGN AND UPDATE ITS OWN PROGRAM AND TO COMPLY WITH ALL NATIONAL, FEDERAL, STATE AND LOCAL LAWS AND REGULATIONS APPLICABLE TO SAFETY, OCCUPATIONAL HEALTH, RIGHT-TO-KNOW AND ENVIRONMENTAL PROTECTION."