Welcome to the State Water Resources Control Board Welcome to the California Environmental Protection Agency
UST Program - Leak Prevention

UST Program - Line Leak Detection & Automatic Tank Gauge Equipment


Field Evaluation Study


Written Questions Submittal Deadline: March 29, 2001
Final Date for Proposal Submission: April 20, 2001


The purpose of the Line Leak Detection and Automatic Tank Gauge Equipment Field Evaluation Study is to simulate artificial leaks in operating UST systems (without actual releases to the environment) and evaluate the equipment's ability to quantitatively detect the simulated leak. The purpose of LLD and ATG leak detection equipment is to identify the presence of a leak in an UST system at an early stage, so the UST system can be repaired before extensive contamination of the environment or the need for extensive corrective action. Field-testing is necessary to determine if these leak detection methods are performing properly under operating conditions. Leak detection methods most often associated with single-wall UST systems are to be evaluated in this study because leaks from single-wall UST systems are more likely to impact the environment. Recent legislation (Senate Bill [SB] 989) calls for more stringent standards in the area of leak prevention (e.g., under dispenser containment, enhanced leak detection methods, etc.). Further evaluation of the ability of currently accepted LLD and ATG equipment to function in the field will help determine if additional requirements are necessary.

Evaluation of LLD and ATG equipment in the field will test the effectiveness of the various types of LLD and ATG equipment after years of operation under field conditions. Based on the data collected as part of this study, following issues should be addressed to arrive at conclusions and recommendations:

  1. Are the LLD and ATG equipment currently in use in UST systems detecting leaks at the rates specified in the California UST Regulations?
  2. Are the LLD and ATG leak detection systems performing consistent with the results of third party certification testing?
  3. What are the typical problems encountered in the field that may contribute to the failure of these leak detection systems to perform adequately during the field evaluation study (e.g., improper installation, programming, maintenance, durability, etc.)?
  4. What improvements or changes can be made to existing standards and/or regulations to improve the effectiveness of these leak detection systems?

Request For Proposal (RFP) Information
Once you link to the RFP page,

  • Click on View by Contract Number or Agency
  • Click Agency, State Gov't, State Water Resources Control Board, Submit
  • RFP 79550-44

Notice of Intent to Award will be posted on May 22, 2001.

For more information on ATG and LLD equipment, please visit our website at: http://www.waterboards.ca.gov/water_issues/programs/ust/leak_detection/lld_agt_study/index.shtml

Any questions, please contact Erin Ragazzi at (916) 341-5863.