In the corresponding field of the form, you can attach any files which can be useful to our review and final proposal. File types can have any of the following extensions .pdf, .dwg, .dgn, .shp, .dwf, .zip, .rar, .kml, .kmz, .doc, .docx, .xls, .xlsx, .jpg, .jpeg, .png, .gif.
Please note that the maximum size of each attachments is 12MB.