I am an Electrical Contractor in La Crescenta, California. I have two jurisdictions to contend with, City of Glendale, and the unincorporated area of Los Angeles County. City of Glendale does not enforce the two ground rod rule, but Los Angeles County does. The problem is that La Crescenta is very rocky, it's called an Alluvial Fan. The mountains above over the many centuries have deposited many large boulders, and rocks in the area. Driving a ground rod is almost impossible, two ground rods is impossible. Instead of La Crescenta it is sometimes call "Rock Crescenta" ! This ground rod rule seems over reaching. What are you suggestions ?