mrstone wrote: We were

[svelte]

[quote=mrstone] We were originally looking into SEH but am even more concerned about the former landfill surrounding that area. The details about the landfill and its borders are very hard to find. Does anyone have more info on it?[/quote]

This is the first link that pops up if you Google “San Marcos Landfill”:

http://www.sdcounty.ca.gov/general_services/RES/Develp_Opp/RES_DO_San_Marcos.html

And this diagram matches my memory of where the landfill was located:

http://www.sdcounty.ca.gov/reusable_components/images/dgs/RES_DO_San_Marcos_Map.jpg

Personally, I wouldn’t worry about it as long as my house wasn’t built on top of it. And currently, it appears that there aren’t any houses on that property.