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State Water Resources Control Board <br /> Division of Rater Quality Arnold Schivarzene <br /> Linda S. Adams gger <br /> Secretaryfm. 10011 Street, Sacramento, California 95814 ♦ (916) 341 -5775 Gooenrw' <br /> Environmental Protection Mailing Address: P.O. Box 2231, Sacramento, California 95812 <br /> FAx (916) 341 -5808 ♦ Internet Address: http://w v.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 �urpose 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 II 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 Code4 . 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 /> 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 /> Qi Recycled Paper <br />