MATERIAL SAFETY DATA SHEET

DATE REVISED: 05/01/01



SECTION I - PRODUCT AND COMPANY IDENTIFICATION



Identity:      Fire Clays

Trade Names: Lincoln #7, #8, #9, Lincoln #60, Mortar Clay (Bagged and Bulk), Pond Liner Clay and Blue Clay

Manufacturer's Name:                                               Emergency Telephone Number

Gladding, McBean                                                   (916) 645-3341

601 7th Street                                                     Telephone Number for Information

Lincoln, CA 95648                                                        (916) 339 -8127



SECTION II - PRODUCT AND COMPONENT DATA



                                                                     %by             ACGIH         OSHA

Composition                                  CAS Number              Weight           TLV            PEL

                                                                                       10 mg/m3       15 mg/m3

Lincoln Fireclays                            Various                 >95%





EXPOSURE LIMITS:



Composition                                  CAS Number                         ACGIH TLV               OSHA

PEL

Crystalline Silica (Quartz)                  14808-60-7                         See Below            See Below





                                                                                0.5 mg/m3               0.5 mg/m3

Barium                                       513-77-9



OSHA PEL for crystalline silica in the form of quartz is = 10 mg/m3 ?(% Si02+2) and 50% of this value for

crystobalite and tridymite.





 SECTION III ?HEALTH HAZARD and FIRST AID INFORMATION



CHRONIC HAZARDS:

Primary Route of Exposure: Inhalation



Exposure Limits: (Acceptable exposure levels for this product must be defined in the workplace due to the

combination of silica and other constituents and condition of use.) Unless specified otherwise, limits are expressed

as eight-hour time-weighted averages (TWA). Limits for cristobalite and tridymite (other forms of crystalline silica)

are equal to one-half of the limits for quartz.

                                       3                          3

Particulates or Dust: TLV - 10mg/m (total particulate) or 3mg/m (respirable particulate), not otherwise classified;

OSHA PEL.= 15 mg/m (total particulate, not otherwise regulated). OSHA PEL = 5 mg/m3 (respirable particulate,

                        3



not otherwise regulated).                                                      (%Si02 +2); OSHA Proposed

Respirable Crystalline Silica (quartz): TLV = 0.1 mg/m3; OSHA PEL =10 mg/m3 ?br>
             3

PEL 0.1 mg/m



                                                             ?(%Si02 + 2)

                                                         3

Respirable Dust containing silica: OSHA PEL = 10 mg/m



Total Dust containing silica: OSHA PEL = 30 mg/m3 ?(%Si02 + 2)

ACGIH and OSHA have determined that adverse effects are not likely to occur in the workplace provided exposure

levels do not exceed the appropriate TLVs/PELs. However, because of the wide variation in individual

susceptibility, lower exposure limits may be appropriate for some individuals, including persons with pre-existing

medical conditions such as those described below.



Abbreviations: TLV = threshold limit value of the American Conference of Governmental Industrial Hygienists

(ACGIH); OSHA PEL = permissible exposure limit of the Occupation Safety and Health Administration (OSHA);

mg/m3 = milligrams of substance per cubic meter of air.

SUBCHRONIC AND CHRONIC HEALTH EFFECTS:



Pulmonary Diseases: Excessive exposure to particulates (dust) over an extended period of time may result in the

development of silicosis and other pulmonary diseases.



Carcinogenicity: IARC has classified respirable crystalline silica (quartz) a known carcinogen in humans.





California Proposition 65 Warning: Sanding dry clay products will expose you to respirable crystalline silica

which is "known in the State of California to cause cancer and to other substances which are known to the State

of California to cause cancer, birth defects and other reproductive harm."



See also: American Society for testing and Materials (ASTM) Standard practice El 132-86, "Standard Practice for

Health Requirements Relating to Occupational Exposure to Quartz Dust."



Medical Conditions Aggravated by Exposure: Excessive dust exposure may aggravate any existing respiratory

disorders or diseases. Possible complications of allergies resulting in irritation to skin, eyes and respiratory

passage may occur from excessive exposure to dusts.



ACUTE HAZARDS:



Eye Contact: Direct contact with dust may cause irritation by mechanical abrasion.



Skin Contact: Direct contact may cause irritation by mechanical abrasion.



Skin Absorption: Not expected to be a significant exposure route.



Ingestion: Expected to be practically non-toxic. Ingestion of large amounts may cause gastrointestinal irritation

and blockage.

Inhalation: Dusts may irritate the nose, throat, and respiratory tract by mechanical abrasion. Coughing, sneezing,

and shortness of breath may occur following exposures in excess of appropriate exposure limits. Repeated

overexposure to very high levels of respirable crystalline silica (quartz, cristobalite, tridymite) for periods as short

as six months have caused acute silicosis. Acute silicosis is a rapidly progressive, incurable lung disease that is

typically fatal. Symptoms include (but are not limited to); shortness of breath, cough, fever, weight loss, and chest

pain.



FIRST AID:



Eves: Immediately flush eye(s) with plenty of clean water for at least 15 minutes, while holding the eyelid(s) open.

Occasionally lift the eyelid(s) to ensure thorough rinsing. Beyond flushing, do not attempt to remove material from

the eye(s). Contact a physician if irritation persists or later develops.

Skin: Wash with soap and water. Contact a physician if irritation persists or later develops.



Ingestion: If person is conscious, give large quantity of water and induce vomiting; however, never attempt to

make an unconscious person drink or vomit. Get immediate medical attention.



Inhalation: Remove to fresh air. Dust in throat and nasal passages should clear spontaneously. Contact a

physician if irritation persists or later develops.



SECTION IV - PHYSICAL/CHEMICAL CHARACTERISTICS



Boiling Point:                        NA                                    Specific Gravity (H20 = 1):          2.6

Vapor Pressure (mm Hg):               NA                                    Melting Point:                       NA

Vapor Density (Air = 1):         NA                                    Evaporation Rate:

Solubility in Water:             0                                     (Butyl Acetate = 1)        NA

Appearance and Odor: Solid, essentially odorless, wide range of colors







SECTION V - FIRE AND EXPLOSION HAZARD DATA



Flash Point (Method Used): NA

                                                        Flammable Limits: NA       LEL: NA     UEL: NA

Extinguishing Media: NA

                                                        Special Fire Fighting Procedures: None

Unusual Fire and Explosion Hazards: None





SECTION VI - REACTIVITY DATA



Stability:        Unstable:       Stable: X Conditions to Avoid: None

Incompatibility (Materials to Avoid): None known

Hazardous Decomposition or Byproducts: None known Hazardous

Polymerization:                       May Occur:      Will Not Occur: X       Conditions to Avoid: None



SECTION VII - PERSONAL PROTECTION AND CONTROL MEASURES



RESPIRATORY PROTECTION: Dust is generated when working with dry clay. To minimize exposure to dust

and/or crystalline silica, cutting or sanding dry clay products should be conducted with sufficient ventilation. When

such controls are not feasible, NIOSH/MSHA approved respirators must be worn in accordance with a respiratory

protection program which meets OSHA requirements as set forth at 29 CFR1910.134 and ANSI Z88.2-1080

"Practices for Respiratory Protection."

SKIN PROTECTION: Use gloves and/or protective clothing if abrasion or allergic reactions are experienced.



EYE PROTECTION: Use safety glasses with side shields. Face shields should also be used when dry sawing clay

products. Dust goggles should be worn when excessively (visible) dusty conditions are present or are anticipated.

LOCAL EXHAUST: When dry sanding or grinding clay products, use sufficient local exhaust to reduce the level of

respirable dust to the applicable standards set forth in Section III. See ACGIH "Industrial Ventilation, A Manual of

Recommended Practice," latest edition.



WORK/HYGIENIC PRACTICES: Avoid creating and breathing dust.



OTHER CONTROL MEASURES: Respirable dust and quartz levels should be monitored regularly. Dust and

quartz levels in excess of appropriate exposure limits should be reduced by feasible engineering controls,

including (but not limited to) wet sanding, wet suppression, ventilation, and process enclosures. Respirators must

be worn when such controls are not feasible or do not completely control dust generation.





SECTION VIII - HANDLING AND STORAGE INFORMATION



STEPS TO BE TAKEN IN CASE MATERIAL IS RELEASED OR SPILLED: Use adequate ventilation, dustless

vacuum or cleanup systems for handling, storage, and clean-up so that airborne dust does not exceed the PEL.

Use adequate ventilation and dust equipment. Practice good housekeeping. Do not permit dust to collect on

walls, floors, sills, ledges, machinery, or equipment. Maintain, clean, and fit test respirators in accordance with

OSHA standards. Maintain and test ventilation and dust collection equipment. Wash or vacuum clothing, which

has become dusty. See also control measures in Section VII.



WASTE DISPOSAL METHOD: This material is classed as a non-hazardous solid waste for disposal.

PRECAUTIONS TO BE TAKEN IN HANDLING AND STORING: Avoid generating dust. Wash hand thoroughly

after working on clay.

OTHER REGULATIONS: Community Right-To-Know = this product is not subject to the reporting requirements of Title

III of SARA, 1986, and 40 CFR 372.





TRANSPORTATION:           DOT Hazard Classification: Not Regulated UN/NA Code: None

                          Placard Required: None.

                          Labeling Requirement:

                          None.



SECTION IX - OTHER INFORMATION



The information and recommendations contained herein are based upon the data believed to be correct.

However, no guarantee or warranty of any kind, express or implied, is made with respect to the information

contained herein. We accept no responsibility and disclaim all liability for any harmful health effects, which

may be caused by exposure to airborne dust particles created by using dry clay products. Customers/users of

clay must comply with all applicable health and safety laws, regulations, and orders.

 MSDS STATUS: Revision 2

 PREPARER: Normita G. Callison, REM

 Title: Environmental Manager

 Telephone No: ( 916 ) 339 ?127