Elevated Nickel and Vanadium concentrations post-treatment?

[cfj104]

Okay,I have a site where we are taking the soil off site for thermal treatment. The problem is that the post treatment sample concentrations of nickel and vanadium have increased significantly and we can not figure out what the cause of the increas may be.

Has anyone seen this before or have any suggestions for what may be causing the increased concentrations? The samples are from an MGP site.

Thanks.

 

[kenvlach]

cfj104, have you resolved this issue?
Most likely, some hot spots were missed during soil sampling.
Did someone experienced do the Phase I (site history & survey) and Phase 2 (soil sampling)?

Nickel is commonly found near old electroplating facilities (in-house repair shop?) but not vanadium. One source is crude oil, which sometimes contains V (as well as lesser amount of Ni. This oxidizes to V₂O₅ and contributes to hot corrosion by lowering the melting point of protective oxides on flues. So, the metal contaminants could be directly from the fuel and partly from corroded flue metal, ending up together in corrosion products.
A fairly simple explanation is given at the link below. You can google on vanadium pentoxide hot corrosion for more info.

http://www.liquidminerals.com/fuels.htm