They left voicemail for me to call back which I did. It was another PGW number, but sounded legit. They wanted to schedule time to inspect meter for leaks/corrosion. Said they had previously sent a letter and even gave me the date they sent it which was quite possible. Anyhow I called the main PGW number to ask if this is standard procedure and was told that it was. So I have someone coming to look at my meter.