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compatibility requirement is limited to cr iinment and components of double-wall ' —systems. (California Code of <br />Regulations, section 2631(k).) <br />All primary containment including any integral secondary containment systems must demonstrate compatibility. Tanks of all <br />USTs installed before January 1, 1991, piping on all USTs installed before July 1, 1992, and all other components on all USTs <br />installed before January 1, 1995 are required to demonstrate compatibility with biodiesel in one of the following ways: 1) an <br />independent testing organization approval in accordance with industry codes, voluntary consensus standards, or engineering <br />standards that explicitly includes a rating for biodiesel or biodiesel mixtures; or 2) an affirmative statement of compatibility from <br />the manufacturer of the UST containment and components that specifies the acceptable ethanol concentration. <br />For all UST systems, in the event that non -integral secondary containment is used, it shall be designed and constructed <br />according to an engineering specification approved by a state registered professional engineer or according to a nationally <br />recognized industry code or engineering standard. The engineering specification shall include the construction procedures. <br />Materials used to construct the secondary containment system shall have sufficient thickness, density, and corrosion resistance <br />to prevent structural weakening or damage to the secondary containment system as a result of contact with any released <br />biodiesel. <br />For applicable leak detection equipment for biodiesel please refer to the link below. <br />http://www.waterboards.ca.gov/water issues/programs/ust/leak prevention/18113/misc/biodiesel eg.shtml <br />As far as the Federal UST requirements, which apply to all UST systems, for tank, piping, containment sumps, and release <br />detection equipment they should be being met if state requirements are met. For pumping equipment, spill equipment, and <br />overfill equipment the federal rule requires either: <br />(i) A certification or listing of UST system equipment or components by a nationally recognized, independent testing laboratory <br />for use with the regulated substance stored; or <br />(ii) An Equipment or component manufacturer approval. The manufacturer's approval must be in writing, indicate an affirmative <br />statement of compatibility, specify the range of biofuel blends the equipment or component is compatible with, and be from the <br />equipment or component manufacturer. <br />These extra federal requirements will eventually become state requirements when the State's UST regulations are amended to <br />be at least as stringent as the federal requirements so that UST owners/operators only need to meet state requirements to meet <br />federal requirements as well. <br />These records are to be maintained for as long as the substance is stored. <br />Feel free to inquire further if necessary. <br />Cory Hootman, P.E. <br />Water Resource Control Engineer <br />State Water Resources Control Board, Division of Water Quality <br />Underground Storage Tank Program, Leak Prevention Technical Unit <br />10011 Street, 15`h Floor <br />Sacramento, CA 95814 <br />Ph: (916) 341-5668 <br />Fax: (916) 341-5808 <br />From: Garrett Backus [EH] [mailto:gbackusC@sjcehd.com] <br />Sent: Monday, March 07, 2016 9:26 AM <br />R E L�VOL:' <br />APR 2 6 2016 <br />