Underground storage tank tightness testing licensing and certification exam.
Contributors: Oregon. Underground Storage Tank Compliance Program.
Series: Study information
Publisher: Underground Storage Tank Compliance Program?
Published: 1991
Place of publication: [Portland, Or
Language: eng
Subjects: Underground storage -- Certification -- Oregon -- Study guides.; Storage tanks -- Certification -- Oregon -- Study guides.
Other titles: Tightness testing licensing and certification exam.
Notes: Title from cover.

"June 1991."

Includes bibliographical references.