Sprayed concrete as a temporary stabilization measure

Our project has around 10 levels of undergrouns parking. A huge ramp for earth-movement vehicles is being created as construction evolves. The slopes at the sides of the ramp go for more than 40 feet tall so it is a little bit difficult to put something like a plastic or a not-woven geotextile, the contractor sprayed concrete for the first 10 feet and then for the rest a mixture of cement and water (in Mexico is some sort of grout) is poured over the rest of the slope. As excavation goes deeper this mixture is poured over the new slope. This mixture contains no additive, like I mentioned is only cement and water. I just wanted to make sure that this is not considered some sort of soil contamination.