MATERIAL SAFETY DATA SHEET

SECTION I - CHEMICAL PRODUCT & COMPANY IDENTIFICATION

Trade Name: Transite HT	MSDS Number: B-004
Generic Name: Calcium Silicate Board	Revision:9
Manufacturer: BNZ Materials, Inc.	Date Issued: June 4, 2006
Address: 6901 S. Pierce Street, Suite 260	24 hour Emergency Number (ChemTrec®): 800-424-9300
Littleton, CO 80128, USA

SECTION II - COMPOSITION/INFORMATION ON INGREDIENTS

Chemical Name		CAS Number	%	TLV	PEL
Calcium Silicate		1344-95-2	55-75	10 mg/m3	5 mg/m3
Calcium Metasilicate (Wollastonite)		13983-17-0	20-40	3 mg/m3	5 mg/m3
Natural Organic Fibers		65996-61-4	0-5	None	None
Crystalline Silica (quartz)		14808-60-7	0.1-2	0.05 mg/m3	0.1 mg/m3
Key:	TLV = ACGIH, 8 hr. time weighted average (TWA); PEL = OSHA permissible exposure limit.
	TLV and PEL limits are for total respirable (Inhalable) dust.

SECTION III - HAZARDS IDENTIFICATION

Emergency Overview: This product contains crystalline silica which is considered a hazard by inhalation. The International Agency for Research on Cancer (IARC) has classified occupational exposures to respirable crystalline silica as being carcinogenic to humans (Class 1). This classification is based on what IARC considered sufficient evidence from epidemiological studies of humans for the carcinogenicity of inhaled silica in the forms of quartz and cristobalite. Crystalline silica is also known to cause Silicosis, a non-cancerous lung disease.

Primary Routes of Entry: Via respirable dust to the lungs and respiratory system and via coarse dust and particulate to the eyes.

Primary Target Organs: Lungs, respiratory system and eyes.

Potential Health Effects:

Medical Conditions Aggravated by Exposure: Pre-existing chronic upper respiratory and lung diseases such as, but not limited to, bronchitis, emphysema and asthma.

Carcinogenicity: This product contains crystalline silica which is classified as a class 1, human carcinogen by IARC, as a suspect carcinogen by NTP and as a possible select carcinogen by OSHA.

SECTION IV - FIRST AID MEASURES

Inhalation: Remove to fresh air. Drink water to clear throat and blow nose to evacuate dust. If coughing and irritation develop, call a physician.

Eye Contact: Flush with large amounts of water until irritation subsides, at least 15 minutes. See a physician if irritation persists.

Skin Contact: Normal good personal hygiene practices. Wash with mild soap and warm water after each exposure.

Ingestion: Emergency procedures not normally required. May be a temporary irritant to the GI system.

SECTION V - FIREFIGHTING MEASURES

SECTION VI - ACCIDENTAL RELEASE MEASURES

Clean-up Procedures: Pick up or shovel material into waste container taking care to minimize dust. Wet down if necessary to control dust. Vacuum clean dust with equipment fitted with HEPA filter

Personal Precautions: If dusty conditions exist, wear a face mask approved for use with dusts such as 3M 8511 N-95 or equivalent.

Environmental Precautions: None normally required.

SECTION VII - HANDLING AND STORAGE

Storage Requirements: Store in dry area. Always segregate materials by major hazard class.

Special Sensitivity or Incompatibility: Avoid contact with strong acids.

Handling Precautions: Assure proper respiratory protection if dust potential exceeds PEL/TLV.

SECTION VIII - EXPOSURE CONTROLS/PERSONAL PROTECTION

Respiratory Protection: When over PEL/TLV wear an approved face mask such as 3M 8511 N-95 or equivalent, to protect against silica and pneumoconiosis producing dust. Concentrations of dust that exceed the recommendations of the dust mask manufacturer will need a higher level of respiratory protection, such as a half mask respirator with appropriate dust filters.

Eye Protection:Wear safety glasses with side shields, goggles or face shield when cutting, milling or abrading to protect eyes against dust and particulate.

Skin Protection: Under normal conditions the wearing of protective gloves and clean, body-covering clothing should be adequate.

Engineering Controls: Maintain sufficient mechanical or natural ventilation to assure dust concentrations remain below PEL/TLV. Use local exhaust if necessary. Power equipment should be equipped with properly designed dust collection devices.

SECTION IX - PHYSICAL AND CHEMICAL PROPERTIES

SECTION X - REACTIVITY

Stability: Product is stable under normal conditions.

Hazardous Polymerization: Cannot occur.

Incompatibilities: None in designed use.

Decomposition Products: Decomposition of residual organic fillers will emit fumes of CO and CO₂ during initial exposure to service temperatures.

Conditions to Avoid: None in designed use.

SECTION XI - TOXICOLOGICAL/ECOLOGICAL INFORMATION

LD₅₀: N/Av     LC₅₀: N/Av

Toxicological Hazards: Some medical studies of wollastonite mine and mill workers suggest that long term cumulative exposures to wollastonite dust may cause decreased pulmonary function or mind industrial bronchitis, particularly in workers who smoke.

Ecological Hazards: Most ingredients in this product are naturally occurring minerals. Unless contaminated in service, this product is non-hazardous to the environment.

SECTION XII - DISPOSAL CONSIDERATIONS

Waste Disposal Method: May be disposed in an approved landfill unless contaminated in service. If contaminated with hazardous materials, place waste in suitable container. Seal and properly label the waste container. Send the container to an approved Transportation, Storage and Disposal (TSD) facility via an approved waste hauler. Be sure manifests have been completed and an adequate "Paper trail" has been established.

SECTION XIII - TRANSPORTATION INFORMATION

US DOT Shipping Name: Not regulated	DOT Label: None	UN/NA Number: None
Canadian TGD Shipping Description: Not regulated as dangerous goods according to Canadian TDGA
International Dangerous Goods Information:
IMO: Not regulated as dangerous goods according to the IMDG Code.
ICAO: Not regulated as dangerous goods according to the IACO Technical Instructions.

SECTION XIV - REGULATORY INFORMATION

OSHA Status: This product is considered hazardous under OSHA criteria.

TSCA/CEPA Status: All components of this product are included in the TSCA and CEPA Chemical Inventories or are naturally occurring.

CERCLA Reportable Quantity: N/Ap

SARA Title III:

WHMIS Information: WHMIS Classification: D-2A - Material causing other toxic effects (VERY TOXIC - Chronic). This product has been classified in accordance with the hazard criteria of the Controlled Products Regulations (CPR).

Other Regulatory Classifications:

DSCL (EEC): R36 - Irritating to eyes
                         R39 - Danger of very serious irreversible effects
                         R45 - May cause cancer

SECTION XV - APPROVALS

Reason for Issue: WHMIS 3 year update	Approval Date: June 4, 2006
Prepared by: CCG, Inc.	Supersedes Date: May 3, 2003
Revision History: Update HMIS Data, May 5, 2002; Change to Crystalline Silica (quartz) TLV standard (0.05 mg/m3). Removal of Product Stewardship Information (June 4, 2003).

SECTION XVI - DISCLAIMER

As of the date of this document, the foregoing information is believed to be accurate and is provided in good faith to comply with applicable federal and state laws. However, no warranty or representation of law or fact, with respect to such information, is intended or given.