This is my first experience with you guys, and I’m thoroughly impressed! The reports were great. Your question regarding the higher copper content found in the Port side was right on the money, this was the first sample taken of the two and an older Jabsco dipstick pump was used to take the sample.  I didn’t have a way to clean or flush the pump before the sample, so I’d bet that explains the higher readings.  Thanks again for the help, and I look forward to using your services in the future.