Specialty Granules (SGI)
Offices · Ione, CA
SGI is a mining and mineral processing company specialising in roofing products, building materials and soil amendments for agriculture. Headquartered in Hagerstown, Maryland, it runs five production plants nationwide, of which the Ione plant is one. SGI is a Standard Industries company.
Hours
| Sunday | Closed |
|---|---|
| Monday | 7 AM – 3 PM |
| Tuesday | 7 AM – 3 PM |
| Wednesday | 7 AM – 3 PM |
| Thursday | 7 AM – 3 PM |
| Friday | 7 AM – 3 PM |
| Saturday | Closed |
Hours can change, especially around holidays. Please call ahead.
Address
1900 CA-104, Ione, CA 95640
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