Delta Crushed Stone

SECTION 2: Hazards identification

WARNING! CRUSHED STONE IS NOT A KNOWN HEALTH HAZARD. HOWEVER CRISHED STONE MAY BE SUBJECTED TO VARIOUS NATURAL OR MECHANICAL FORCES THAT PRODUCE SMALL PARTICLES (DUST), WHICH MAY CONTAIN RESPIRABLE CRYSTALLINE SILICA (PARTICLES LESS THAN 10 MICROMETERS IN AERODYNAMIC DIAMETER).REPEATED INHALATION OF RESPIRABLE CRYSTALLINE SILICA (QUARTZ) MAY CAUSE DAMAGE TO LUNGS THROUGH PROLONGED OR REPEATED EXPOSURE AND MAY CAUSE LUNG CANCER.

2.1 Classification of the substance or mixture

CARCINOGENICITY/INHALATION — Category 1A SPECIFIC TARGET ORGAN TOXICITY (REPEATED EXPOSURE) — Category 2

Signal word

Danger

Hazard statements

Harmful if swallowed. May cause cancer (inhalation). May cause damage to lungs with prolonged or repeated exposure (inhalation). EMERGENCY OVERVIEW:

Appearance/Odor

Loose granular rock, gravel, and silt mixture of varying size and color. No odor. Carcinogen, Acute & Chronic Toxin Warning: • This product contains greater than 0.1% crystalline silica. Crystalline silica has been linked to cancer, silicosis, and other lung problems in conditions of prolonged airborne over- exposure. Repeated inhalation of respirable crystalline silica (quartz) may cause lung cancer according to IARC and NTP; ACGIH states that it is a suspected cause of cancer. Other forms of RCS (e.g.,tridymite and cristobalite) may also be present or formed under certain industrial processes. • Carcinogen- Acute & Chronic. Product contains crystalline silica quartz. The International Agency for Research on Cancer (IARC) classifies respirable crystalline silica as Group I – Known Human Carcinogen. The National Toxicology Program (NTP) lists respirable crystalline silica as a Known Human Carcinogen. The American Conference of Governmental Industrial Hygienists (ACGIH) lists respirable crystalline silica as a Suspected Human Carcinogen (A-2).

Principle Routes of Exposure

Inhalation TARGET ORGAN(S): Lungs EYE • Avoid eye contact. Exposure to dust may be irritating to the eyes and may impair visibility. These effects are transient and complete recovery follows. SKIN • Avoid prolonged and repeated skin contact. Do not handle until all safety precautions have been read and understood. Wear protective gloves, protective clothing, eye protection and face protection. Wash hands thoroughly after handling. INHALATION • Avoid prolonged and repeated inhalation of dust. Acute and chronic exposure to dusts may be irritating to the respiratory tract by frictional action, and may provoke bronchoconstriction in hypersusceptible individuals. • Respirable dusts can cause bothersome deposits in the nasal passages. Nuisance dusts cause toxicity from physical overloading of the respiratory clearance mechanisms. • Significant deterioration of pulmonary function and chronic bronchitis can develop with prolonged overexposure to dusts in excess of established limits (See Section 8). • Continued overexposure to silica dust can result in silicosis, a chronic, progressive and sometimes fatal lung disease that is characterized by the presence of typical nodulation of the lungs leading to fibrosis. Silicosis can develop in weeks with high exposures and after years of lower exposure. Symptoms and signs of silicosis include cough, shortness of breath, wheezing, decreased pulmonary function, and changes in chest X-rays. INGESTION • Minute amounts accidentally ingested during industrial handling are not likely to cause injury.

Medical Conditions Generally Aggravated by Exposure

Chronic exposure to nuisance dusts may enhance susceptibility to respiratory tract infections. • Silica can cause silicosis which, in turn, increases the risk of pulmonary tuberculosis infection. • Smoking may increase the risk of developing lung disorders associated with silicosis.