Imerys Minerals California’s Lompoc Plant is located approximately one mile south of Lompoc and includes diatomaceous earth mining and processing facilities.  Diatomaceous earth is a sedimentary deposit composed of fossilized diatoms which had silicaceous skeletons.  Imerys mines, mills, and processes diatomite into powders of various grades for use by industries in many applications.  Imerys also operates a separate Celpure Plant within the Lompoc facility to produce specialized product and develop new products.

Operating Permits

Lompoc Plant Title V Operating Permit – due for renewal 3/1/2018.

Draft Permits

There are no current draft permits for the Imerys Minerals California Stationary Source.

Public Notices

There are no current public notices for the Imerys Minerals California Stationary Source.

Current Oxides of Sulfur Emission Rate

Imerys continuously monitors its emission rate of oxides of sulfur and posts the data to the web.  The current rate can be seen here: