Material Safety Data Sheet (MSDS)

Section 6 - Accidental Release Measures

Wear appropriate personal protective equipment as described in Section 8 of this document. Collect the material using a method which does not produce dust [High-Efficiency Particulate Air (HEPA) vacuum or thoroughly wetting down the silica]. Place the silica in a covered container appropriate for disposal. Dispose of the silica according to federal, state, and local regulations.

Section 7 - Handling and Storage

Do not breathe dust which may be created during the handling of this product. Do not rely on vision to determine whether respirable silica is present in the air, as it may be present without a visible cloud. Use good housekeeping procedures to prevent the accumulation of silica dust in the workplace. Avoid the creation of respirable dust.

Use adequate ventilation and dust collection equipment. Ensure that the dust collection system is adequate to reduce dust levels to below the appropriate occupational health limit.

In accordance with the U.S. Occupational Safety and Health Administration's (OSHA) Hazard Communication Standard (29 CFR 1910.1200, 1915.99, 1917.28, 1918.90, 1926.59, 1928.21), state, and/or local right-to-know laws and regulations, familiarize your employees with this MSDS and the information contained herein. Warn your employees of the potential health risks associated with the use of this product and train them in the appropriate use of personal protective equipment and engineering controls which will reduce their risks of exposure.

Section 8 - Exposure Controls/Personal Protection

Ventilation:	Use local exhaust as required to maintain exposures below the occupational exposure limits; see also ACGIH, Industrial Ventilation - Recommended Practice (Latest edition).

Respiratory Protection:	NIOSH recommends that workers wear the type CE supplied air abrasive blasting respirator operated in the positive-pressure mode (assigned protection factor (APF) of 2,000) during abrasive blasting operations that involve crystalline silica sand. Avoid breathing dust produced during the use and handling of this product. The following chart specifies the types of respirators which may provide respiratory protection for crystalline silica.

CONDITION Particulate Concentration	MINIMUM RESPIRATORY PROTECTION REQUIRED TO MEET THE CONDITION ACGIH-TLV FOR CRYSTALLINE SILICA (0.1 mg/m³)
Less than or equal to 1.0 mg/m3f (10 x TLV)	Any air-purifying respirator with a P100 filter approved by NIOSH.
Less than or equal to 2.5 mg/m³ (25 x TLV)	Any powered, air-purifying respirator with a P100 filer approved by NIOSH, or any supplied-air respirator equipped with a hood or helmet and operated in a continuous-flow mode (for example, type CE abrasive blasting respirators operated in the continuous flow mode) approved by NIOSH
Less than or equal to 5.0 mg/m³(50 x TLV)	Any air-purifying respirator with a P100 filter approved by NIOSH, or Any powered, air-purifying respirator with a tight-fitting facepiece and a P100 filter approved by NIOSH.
Less than or equal to 100 mg/m³(1,000 x TLV)	Any supplied-air respirator equipped with a half-mask and operated in a pressure-demand or other positive pressure mode.
Less than or equal to 200 mg/m³(2,000 x TLV)	Any supplied-air respirator equipped with a half-mask and operated in a pressure-demand or other positive-pressure mode (for example, a type CE abrasive blasting respirator operated in a positive-pressure mode)
Planned or emergency entry into environments containing unknown concentrations or concentrations less than or equal to 1,000 mg/m³(10,000 x TLV)	Any self-contained breathing apparatus equipped with a full facepiece and operated in a pressure-demand or other positive-pressure mode, or Any supplied-air respirator equipped with a full facepiece and operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained breathing apparatus operated in a pressure-demand or other positive-pressure mode

Manley Bros. Silica Sand MSDS 10/31/00 Page 3 of 7