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State Water Resources Control Board <br /> Linda S.Adams Division of Water Quality Arnold Schwarcenegger <br /> Secretaryfor 10011 Street,Sacramento,California 95814• (916)341-5775 Governor <br /> Environmental Protection Mailing Address: P.O.Box 2231,Sacramento,Califomia 95812 <br /> Far(916)341-5808 ♦ Intemet Address: http://www.waterboards.ca.gov <br /> March 25, 2008 <br /> LG 162-3 <br /> INSTALLATION AND MONITORING REQUIREMENTS FOR <br /> UNDERGROUND STORAGE TANKS INSTALLED <br /> ON OR AFTER JULY 1, 2003 <br /> (Available electronically at http://www.waterboards.ca.gov/ust) <br /> To: Local Agencies and Other Interested Persons <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 3. 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 /> �25281(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 /> °These 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 /> ea Recycled Paper <br />