Overlay existing chemical datasets with central basin to look for correlation

[tbock]

Datasets like TierII, RMP, NPDES.

[kplank1]

I think this will be too many layers and create confusion in navigation. How many NPL sites are even contained within the Central Basin that are not already included in the Sites Layer? If they have a study area the way to navigate to that is to include a new study area to the sites layer.