Occidental Chemical is a chemical manufacturer that makes polyvinyl chloride (PVC) resins, chlorine and caustic soda. These are the key ingredients for a variety of products such as plastics, water treatment chemicals and pharmaceuticals. The company also produces other chemicals including caustic potash, chlorinated organics, calcium chloride and sodium silicates. Occidental Chemicals is a member of the American Chemistry Council’s Responsible Care and maintains the organization's high standards when it comes to safety and environmental responsibility. Based in Dallas, Texas, the San Ramon office is a regional sales office run by Jim Zahmer.