79th Texas Legislature, Regular Session, Senate Bill 15, Chapter 97 Page: 4 of 37
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S.B. No. 15
1 silica in the form of quartz is present in sand, gravel, soil, and
2 rocks.
3 (j) Silica sand is the primary raw material for the
4 production of glass, including container glass (bottles and jars),
5 flat glass (windows), and other forms of glass. Silica sand is used
6 to make foundry molds and cores. Industrial minerals that contain
7 silica are the essential raw materials for the manufacture of
8 ceramics, which include industrial ceramics, sanitary ware
9 (bathrooms), and tableware (plates and cups). Crushed stone and
10 sand and gravel (aggregates), most of which contain crystalline
11 silica, are the primary raw materials in concrete and asphalt;
12 these materials are used in the construction of roads, sidewalks,
13 building foundations, and many other things. Sandstone and
14 granite, both of which contain silica, are used as building
15 materials.
16 (k) The primary adverse health effect associated with
17 silica is silicosis. Silicosis is a lung disease characterized by
18 fibrosis, or scarring, and is caused by prolonged overexposure to
19 respirable silica through inhalation. Additionally, silica
20 inhaled from occupational sources was classified as a lung
21 carcinogen in 1996.
22 (1) Silicosis has been recognized as an occupational
23 disease for over 100 years. By the 1930s, the federal government
24 had launched a silica-awareness campaign, which led to greater
25 protection for workers exposed to silica dust. By the early 1970s,
26 the United States Occupational Safety and Health Administration had
27 begun to regulate occupational exposure to respirable silica. In4
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Texas. Legislature. Senate. 79th Texas Legislature, Regular Session, Senate Bill 15, Chapter 97, legislative document, May 19, 2005; [Austin, Texas]. (https://texashistory.unt.edu/ark:/67531/metapth157578/m1/4/?q=%22%22~1: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu; crediting UNT Libraries Government Documents Department.