For Operators - Well Stimulation



As of October 28, 2019, the following forms must be submitted through the operator-access-only  WellSTAR electronic database:

​​​​​​​​​WellSTAR Form Descriptions

Each form in WellSTAR requires that a Form Description be entered. Please apply the following form descriptions when completing the listed forms in WellSTAR for WST:​

Well Stimulation Process Guidelines

Well stimulation treatments shall not begin without a valid permit approved by CalGEM and compliance with all regulatory requirements administered by other federal, State, tribal, or local agencies.

Please use the following guidelines to navigate the WST permit process. All code sections refer to California Code of Regulations, Title 14, unless otherwise specified.

Select a topic to view guidelines for each step in the WST process:

Well Maintenance

Well stimulation does not include routine work that does not exceed the formation fracture gradient and does not involve emplacing acid in the well at a fluid volume greater than the Acid Volume Threshold (AVT). Any questions about whether a well maintenance treatment qualifies as well stimulation should be directed to CalGEM​ before commencing.

For additional information regarding well maintenance, please visit Well Maintenance and Cleanout History.