Good, because I was about ready to ahh...uhhh...never mind...Boma wrote:No I haven't been insulted by someone. =)
Also when I speak of grass, I'm talking about the ordinately grass that in common among most front yards of suburban homes. I believe there are no rocks or gravel under the grass. Maybe cables or pipes =)
Seriously,
Depending on the area, soil conditions, site prep, etc etc...
If the contractor that built the house needed to use some "select fill" to improve the grade (not necessarily for looks, but for bearing quality) that select fill could almost be anything (within a city or county building code) from sand to clay, or anything they can possibly get their hands on...But that depends on the code...
If it has some aggregate material in there, you may not want to shoot into the ground at all, in your yard...
If that really is your biggest concern...
I had to totally redesign a foundation for a large house by a bayou here in Houston a couple of years ago...It was in an established nieghborhood, with houses already up on either side...The load necessitated us to put in bell-bottom piers around the perimeter and in some key positions inside the foundation area...
We took soil samples and didn't run into anything bad until we started drilling the piers, we then ran into concrete "rip rap" back fill from the bayou dredge the size of basketballs and above...Couldn't do deep piles then...And it varied in depth from 5-6 inches below grade to feet below grade...
So yeah, my advise is unless you know whats in there, don't shoot...Of course thats a good rule regardless...
Shut up Steve! blahhhh...
