The accepted format for reporting results from samples sent to a laboratory like CARO Analytical Services is Portable Document Format developed by Adobe, known as PDF. This provides a slightly more difficult method of uploading a batch of results to this web site, and a derivative format from the same source is preferred.
Transforming PDF to CSV requires a PDF to Excel converter, which accepts a PDF file and converts it to a spreadsheet allowing access to individual cells in rows and columns. Many are available; the following example uses https://www.pdftoexcel.com/, requiring a $25 per year fee for unlimited use.