You have to promise to post back or I will not tell you that the smell might be from dead earth.
In my new development most of the earth is clay. If you dig into it, it smells like a sewer.
If this is the case, the smell will go away after all the homes are built and everyone starts putting in lawns and feed the soil.
You might want to dig a hole or two and see if this is the case.
bring a sample of the soil to your local farm and garden store and have it checked.
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