Essex County · Underground storage tank (UST) work — NJDEP-regulated
Maplewood's early-20th-century colonials and Tudors were built in the oil-heat era; buried or abandoned tanks turn up routinely during home inspections and sweeps.
12 NJDEP-certified UST firms are based in Essex County (statewide firms serve Maplewood too):
Verona Twp · Closure + Subsurface Evaluation
Millburn Twp · Closure + Subsurface Evaluation
Cedar Grove Twp · HHO Closure
Roseland Boro · Closure + Installation-Entire UST System
Essex Fells Boro · Cathodic Protection Specialist + Closure
East Orange City · Closure + Installation-Entire UST System
All Essex County firms · full New Jersey list
Removing a buried residential heating-oil tank in New Jersey typically runs about $1,500–$3,000 when there's no leak. A leaking tank means soil remediation, which can push the total into five figures — which is why a pre-purchase sweep (~$200–$500) matters. A certified firm gives a firm quote after locating and assessing the tank.
Yes. Underground tank closure and removal in New Jersey is regulated by NJDEP and the local construction and fire officials — the work must be done by an NJDEP-certified firm, with permits pulled and the closure properly documented. That paperwork is what protects you and any future buyer.
12 NJDEP-certified UST firms are based in Essex County, and statewide firms serve Maplewood as well. New Jersey requires companies that test, close, or remove underground storage tanks to hold NJDEP certification by category — "subsurface evaluation" is the one most relevant to pre-purchase sweeps.
Tell us what you need — we'll connect you with state-certified companies serving your area. No obligation.