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State Water Resources Control Board <br />Linda S. Adams Division of Water Quality <br />Secretaryfor 1001 I Street, Sacramento, California 95814♦ (916) 341-5775 <br />Environmental Protection Mailing Address: P.O. Box 2231, Sacramento, California 95812 <br />FAX (916) 341-5808 ♦ Internet Address: http:f/www.waterboards.ca.gov <br />October 12, 2007 <br />LG 162-2 <br />INSTALLATION AND MONITORING REQUIREMENTS FOR <br />UNDERGROUND STORAGE TANKS INSTALLED <br />ON OR AFTER JULY 1, 2003 <br />(Available electronically at http:llwww.waterboards.ca.gov/ust) <br />To: Local Agencies and Other Interested Persons <br />Arnold Schwarzenegger <br />Governor <br />The Purpose of this letter is to answer some common questions that have arisen to <br />date about the new installation and monitoring requirements for underground storage <br />tanks (USTs)2 installed (1) on or after July 1, 2003 and prior to July 1, 2004 and (2) on <br />or after July 1, 2004, Discussion of these new installation and monitoring requirements <br />is divided into two parts, as follows- <br />* Part I explains requirements for USTs installed on or after July 1, 2003 and <br />prior to July 1, 2004. These USTs must comply with the requirements outlined <br />in Section 25290.2 of the H&S Code. The requirements are presented in <br />question and answer format, listed numerically as Questions 1-10. <br />♦ Part 11 explains requirements for USTs installed on or after July 1, 2004 in <br />addition to the applicable requirements of Part I. These USTs must comply with <br />requirements outlined in Section 25290.1 of the H&S Code 4. The additional <br />requirements are presented in question and answer format, listed alphabetically <br />as Questions A -D. <br />This letter is intended as a working document and may be periodically updated as new information <br />becomes available and new questions arise. <br />2 The term "underground storage tank" means tank and piping used for the storage of a hazardous <br />substance. [H&S Code, §25281(x)(1).] The term "underground tank system" or "tank system" means an <br />underground storage tank, connected piping, ancillary equipment, and containment systems. [H&S Code, <br />525281(y).] <br />'These requirements became effective on July 7, 2003 with the enactment of Assembly Bill 1702 (Stats. <br />2003, Ch. 42), an urgency measure. <br />4These requirements became effective on January 1, 2003 with the enactment of Assembly Bill 2481 <br />(Stats. 2002, Ch. 999). <br />California Environmental Protection Agency <br />too Recycled Paper <br />