Petroleum Storage Tank Sites

Texas Board of Professional Engineers

I Background

Discussions took place between the Texas Natural Resource Conservation Commission and the Texas Board of Professional Engineers during the summer of 1995 to develop a common understanding of the definition of engineering. The need for clarification arose because of confusion concerning the roles the scientific and engineering professionals have on corrective action for the leaking petroleum storage tank sites. The commission and the board agreed September 13, 1995 that the following LPST Site Activities Chart will designate those corrective action LPST services which are considered to be geological or non- engineering.

II Policy




Emergency Response/Temporary Abatement Measures:
Actions required to mitigate an actual or threatened release of a regulated substance in order to protect public health and safety or the environment from immediate harm. Examples: interceptor trenches, ventilation fans, excavation.


Site Assessment:
Any data acquisition and interpretation necessary to characterize the hydrogeological conditions at a site. This includes definition of the magnitude and extent of contamination, as well as contaminant fate and transport analysis. Examples: monitoring wells, direct push surveys, aquifer tests.

Engineered Wellhead Protection

Risk Assessment:
Use of risk concepts and procedures to determine target health based concentrations of contaminants in soil, water and air. Evaluations are based on PST/RBCA guidelines.



Remedial Action Plan Design:
Data evaluation or design for remedial action plan development. Examples: selection and evaluation of appropriate corrective action technology (ies) and preparation of plans and specifications.

System Installation:
Remediation system installed under engineering oversight.

Remedial Action Oversight:
System installation, operation and maintenance, under the observation and determination of general conformance with plans by a Professional Engineer.

Operation and Maintenance:
Qualified technicians perform regular and timely site visits to gather data about the remediation system. Examples: influent/effluent samples, pressure readings.

Remedial Action Evaluation:
Site data are evaluated to determine progress, efficiency and efficacy of the remediation system. Data are reviewed and system adjustments made to optimize performance.

Monitoring and Evaluation:
Data are acquired and evaluated to determine site status. Monitoring is done throughout a site's history Examples: monitoring prior to Site Assessment, monitoring to confirm closure.


III Related Advisories and Updates

There are no related advisories at this time. Updates may be made periodically through mutual agreement of the Board and TNRCC. Date of this advisory: 10/18/95. The board updated the policy effective 09/01/97 to change the board's name from the Texas State Board of Registration for Professional Engineers to the Texas Board of Professional Engineers.

Questions regarding this advisory may be sent to:

Texas Board of Professional Engineers
P.O. Drawer 18329
Austin, Texas 78760-8329
(512) 440-7723

Email: peboard@tbpe.state.tx.us

home page: http://www.tbpe.state.tx.us

last updated: 04-2000