Cleaning oil in soil & rock.
Determine how large the effected area is. In soil 1 gal will clean approx 2ft x 2ft 3inches deep.
Apply step 1, spray or pour it on, saturate area, all effected soil must come in contact with step 1.
Right after repeat with step 2. Step 1 & 2 must contact each other in the soil. Suggestion use rake to mix the OS liquid in the soil. Keep applying step 1 & 2 while raking it in the soil. Continue this process until all effected areas have been washed with the step 1 & 2, The odor should be gone, if the odor remains then you need to continue adding step 1 & 2 until the odor is 100% gone, Once the odor is gone your done, leave it. No further action needs to be taken.