Neem Oil/RunOff PPM

So I used neem oil/water mixture for plants about 3 weeks ago. I have no adverse reactions, plants look healthy. But I checked run off ppm and it was HIGH. Like, super high. I know I read somewhere the neem is for the soil to use, not the plant, unless you spray the plant.

Tl;dr. Neem oil add 6k ppm to runoff??

Seems likely that neem oil may have added to the run off numbers.
I’ve never checked the ppm of neem oil solution, but it’s probably pretty high.
To add to that, neem oil may have caused a release of nutrients in the medium also.