Give your local plumber a call and ask him.
I work at a 60 year old moderate size (23 service & construction trucks) plumbing company. I ran service for 20 years here and have been the field ops supervisor for the past seven. While I'm in the office in the morning I field calls from people with questions just like this. and try to answer them. If I can't I'll check with one of the other techs who have been here longer than I. Chances are, we've worked on it or in the area. My point being, your local reputable company might be able to assist you as to where your meter/sov is and probably offer a free estimate to resolve the/any issues. I'm still paid by the hour and don't mind helping local potential customers with their questions. We enjoy helping people. It's all good!