Hi, Ruth! I cover anything on the Eastern half of PA (pretty much from Reading to the NJ/PA border). I do have several septic pros that I recommend depending on the location of the home, but you are by no means bound to my choices if you have someone in mind.
I also offer termite (Wood Destroying Insect) inspections, radon testing, and just about any kind of mold or moisture analysis you can think of. Generally speaking, though, I like to try to save clients the money they might otherwise spend on mold testing. Typically, this is only necessary if you are not sure that the substance in question is actually mold, or if you have a specific allergy and/or need to know the type of mold present. Most times, we can do more for free by identifying the source of the moisture that created the mold problem and correcting that, then recommending removal and replacement of molded materials.
This eliminates the mold from the area, exposes any hidden concerns, and addresses the underlying cause - all for Zero Dollars. I use a digital moisture meter to identify any higher than usual moiture contents in any material (sheetrock, plater, concrete, wood, etc) and a thermal imaging camera to try to identify the hidden cause or leak (this is a cool toy that I recently splurged for, but have found invaluable - I even found a leak in my slate roof that is not visible from any vantage point or location in the home!)
As for buried oil tanks - most times we can identify if they are on the property, but if the area has been significantly disturbed (to add a garage, for example) or otherwise altered, the telltale indicators may have been removed and no one would be able to know for sure (save excavation or metal detection devices).
I also do well water testing, using the FASTEST and CHEAPEST (as well as accurate!) lab I have ever encountered. It also happens to be in Chester County!
I carry lead paint swabs (a VERY basic test) to see if there is any surface lead in suspect areas (like closet interiors or wood window frames with cracking or peeeling paint).
Prices and services are listed on my website if you are interested. And of course you can always call me with any questions (about old houses, problems, services - anything house related!) Good luck and I hope I can help!