Use hand digging tools when digging within 24 inches of the outside edge of any underground lines
Utilities will use colored utility flags, stakes or paint marks to mark underground lines. Leave these in place until you have finished digging.
If you or your contractor accidentally digs into a gas pipeline, do not attempt to stop the flowing gas or extinguish any fire. Immediately notify PG&E if you dent, scrape or hit a pipeline while digging so that they can inspect and repair the line to prevent future damage.
Once you are done with your project, you can carefully backfill and compact the soil.