Where are you located? I know

[Eugene]

Where are you located?

I know that much of the city of Escondido has high water table (literally 10-15 feet below surface), that was a concern because the city council has been trying to put a big hotel downtown for the last 5 years, and there was a risk that the underground parking garage of the hotel could get flooded.

http://www.nctimes.com/news/local/escondido/article_f5d704bf-d3aa-5ca1-8e93-ba93df976575.html

According to this map

http://ca.water.usgs.gov/gmaps/gw_map.html

most of Temecula is 30 to 70 feet to groundwater.