A leak in an underground fuel or chemical tank system can be costly.. both environmentally and economically. Early detection is of the utmost importance! As soil and groundwater contamination increase, so does your legal liability and the cost of remediation. Fenley & Nicol is license to perform tank testing services by regulatory agencies throughout the NY Tri- State area. If you need to test tanks containing gasoline, diesel, heating and waste oil, or chemical products; test lines leading from the tank to a pump; or test a leak detector, Fenley & Nicol’s Tank Testing division offers a wealth of expertise cost effective solutions to your contamination problems.