[Title 40 CFR 280.72]
[Code of Federal Regulations (annual edition) - July 1, 2002 Edition]
[Title 40 - PROTECTION OF ENVIRONMENT]
[Chapter I - ENVIRONMENTAL PROTECTION]
[Subchapter I - SOLID WASTES (CONTINUED)]
[Part 280 - TECHNICAL STANDARDS AND CORRECTIVE ACTION REQUIREMENTS FOR OWNERS AND OPERATORS OF UNDERGROUND STORAGE TANKS (UST)]
[Subpart G - Out-of-Service UST Systems and Closure]
[Sec. 280.72 - Assessing the site at closure or change-in-service.]
[From the U.S. Government Printing Office]


40PROTECTION OF ENVIRONMENT232002-07-012002-07-01false280.72Sec. 280.72PROTECTION OF ENVIRONMENTENVIRONMENTAL PROTECTIONSOLID WASTES (CONTINUED)TECHNICAL STANDARDS AND CORRECTIVE ACTION REQUIREMENTS FOR OWNERS AND OPERATORS OF UNDERGROUND STORAGE TANKS (UST)Out-of-Service UST Systems and Closure
Sec. 280.72  Assessing the site at closure or change-in-service.

    (a) Before permanent closure or a change-in-service is completed, 
owners and operators must measure for the presence of a release where 
contamination is most likely to be present at the UST site. In selecting 
sample types, sample locations, and measurement methods, owners and 
operators must consider the method of closure, the nature of the stored 
substance, the type of backfill, the depth to ground water, and other 
factors appropriate for identifying the presence of a release. The 
requirements of this section are satisfied if one of the external 
release detection methods allowed in Sec. 280.43 (e) and (f) is 
operating in accordance with the requirements in Sec. 280.43 at the time 
of closure, and indicates no release has occurred.
    (b) If contaminated soils, contaminated ground water, or free 
product as a liquid or vapor is discovered under paragraph (a) of this 
section, or by any other manner, owners and operators must begin 
corrective action in accordance with subpart F.