Answer: I can't say for sure how the gasoline will affect your plants and/or when it will be gone. Gasoline is very volatile--it goes from the liquid to gaseous state readily. My guess is that some of the liquid gasoline penetrated the soil, and when you turn the soil over you expose the gasoline to the air, and it evaporates, leading to the smell. My only suggestion is to continue to work the soil wherever you smell gasoline, so you continue to expose all the saturated areas to the air. Eventually, the smell should go away. However, I am not aware of just what components of gasoline--the stuff left behind after if evaporates--are toxic and/or will affect your plants. I suggest you add a lot of compost and organic matter to the soil before planting your strawberries, because this will encourage beneficial soil life and may help decontaminate the soil. You might want to call your state's Dept. of Natural Resources and ask for their recommendations. If the soil is really saturated, you may want to remove it, dispose of it as a toxic material, and bring in new topsoil. The agency should be able to guide you.
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