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TESORO <br /> Tesoro Refining&Marketing Company LLC <br /> 301 E.Ocean Blvd,Suite 1600 <br /> Long Beach,CA 90802 <br /> September 20,2018 <br /> San Joaquin County Environmental Health <br /> 1868 E Hazleton Ave <br /> Stockton,CA 95205 <br /> Subject Site: OVERFILL PREVENTION EQUIPMENT INSPECTION <br /> Tesoro/Shell 68150-6133—13975 E Hwy 88,Lockeford,CA 95237 <br /> Dear Inspector: <br /> In compliance with the July 15, 2015 new Federal Regulations (40 CFR Part 280), enclosed, please find the completed <br /> "Overfill Prevention Equipment Inspection" that was performed at the time of the most recent annual monitoring <br /> system certification. Federal Underground Storage Tank (UST) rules require that overfill prevention equipment <br /> automatically restrict flow or alert the transfer operator when the tank is no more than 90 percent full or shut off flow <br /> into a tank when it is no more than 95 percent full. This site location meets the requirement of alerting the transfer <br /> operator when the tank is 90% full by triggering an audible and visual alarm. This alarm is an integral part of the <br /> automatic tank gauge (ATG) system. This inspection verified that the overfill alarm was operating correctly and was set <br /> to provide the warning when the tank is no more than 90 percent full. The ATG probe was removed from the tank and <br /> product float was moved to the position corresponding to the 90 percent fill level, thereby activating the alarm as <br /> required. The inclusion of the annual monitoring system certification report and alarm history with this overfill <br /> equipment inspection form demonstrates compliance the new Federal inspection requirement. <br /> Service Station Systems, Inc. was contracted by the underground storage tank system owner to ensure that this facility <br /> complies with all of the rules and regulations that govern the operation of underground storage tanks and their related <br /> components. <br /> Please contact me at(951) 538-6895 or Stephen.M.Coulter@tsocorp.com if there are any questions. <br /> Sincerer i <br /> StepftmT e <br /> Retail Environmental Compliance Administrator <br />