Regulatory & Technical
Regulatory news & references
Reference documents affecting the leak detection industry, including materials from the EPA's National Work Group on Leak Detection Evaluations (NWGLDE), and the Technical Forum — articles contributed by members of the UST community.
NWGLDE official site ↗
NWGLDE & regulatory documents
NWGLDE List of Leak Detection Evaluations for UST Systems — 8th Edition
The National Work Group's master EPA cross-reference list of evaluated leak detection equipment and methods.
March 15, 2001
NWGLDE Policy Memo #1 — Work Group Ground Rules
May 1, 2000
NWGLDE Policy Memo #2 — Filling Work Group Vacancies
April 11, 2000
NWGLDE Policy Memo #3 — Work Group Procedures
May 1, 2000
ATGS Use on Tanks With Low Product Levels
NWGLDE letter on automatic tank gauging with low product levels.
April 28, 1997
Requirements for ATGS to Be Listed as VTTT
Conditions for automatic tank gauging systems to be listed by NWGLDE as volumetric tank tightness testing methods.
June 1996
Additional Requirements for the MRI CITLDS Protocol
June 13, 1996
NWGLDE Rescinds the June 13, 1996 CITLDS Memo
NWGLDE Position on Licensing of SIR Methods
November 4, 1996
History of the NWGLDE Formation
Curt Johnson letter on the founding of the National Work Group.
NWGLDE Meeting Minutes — Spring 1998 (Anaheim, CA)
April 1–3, 1998
NWGLDE Meeting Minutes — Fall 1998 (Minneapolis, MN)
August 17–19, 1998
California Secondary Containment Testing Survey
Secondary containment testing survey from the State of California.
Y2K Letter/Form to Vendors (California & NWGLDE)
Technical Forum
Articles and contributions from members of the UST community — USTs, pipelines, petroleum, and leak detection. To post an article, send it to cwilcox@kwaleak.com.
Monthly SIR Data Spreadsheets (31 / 30 / 28-day)
Excel spreadsheets set up for UST operators to store their monthly SIR data. Contributed by Steve Berning, Accurate Tank Technologies, Inc.
October 10, 2002
The PERMEATOR — VOC Venting Prevention Device
Paper on a VOC venting-prevention device, contributed by Arid Technologies.
January 2000
Magnetostrictive Probe Logging During the Hector Mine Earthquake
KWA magnetostrictive probe data logged during the 7.2M Hector Mine / Havic Lake earthquake.
October 6, 1999
Pipeline Leak Detection (Petroleum Equipment & Technology)
Petroleum Equipment & Technology — May 1997
Petroleum Equipment & Technology — July 1997
Technical Paper (Steve Holt, 1997)
Finite Element Analysis (Gordji)
Gas Vapor Analysis (Gordji)
