Ben, I cannot edit my post (if possible, please give me that ability even for old posts). I need to correct the link to the Pinellas County study since it has been dead for a while. I asked Oxy Chemical to rehost the study on their site since NSPF took it down and they have now down so. So the first "This link" in the first post should go to this link where there are links to the study and its appendices under the "Technical Information" section. Thanks.