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CalPortland Lathrop RMC Corrective Actions <br /> July 15`h, 2024 <br /> SPCC wording updates. <br /> 4.2 OVERFILL PREVENTION SYSTEMS[40 CFR 112.8[c][8)) <br /> CalPortland employees and their designees use a computer-based monitoring system equipped with <br /> electronic sensors to monitor diesel tank liquid levels. Prior to refilling the diesel tank, the vendor <br /> manual lyverifies that the reading from the monitoring system is accurate.To avoid over-filling the tank, <br /> the vendor only fills to 9D%of the tank's capacity. For ASTs with a liquid gauge, CalPortland Employees <br /> and the vendor carefully observe the gauge d uri rig the fling process to ensure that tariks are not overfilled. <br /> Dike/Secondary Containment Area Drainage <br /> T he c o nc rete d i kes a re drained u nder d i rect s upe ry i sion of facility perscnnel.The accumulated water is <br /> observed for signs of oil prior to draining.If any si Fm of oil oantarrinatlon are present in the water,permrinel will <br /> an-,HW for a cant racted waste hauler to purnpout the water. If there are no signs of oil in the water,a sump- <br /> pump will be used to drain,the containment, Dike drainage events are recorded on the form inc Ii <br /> in Appendix D of this Plan;records ane maintained at the fatilityfin r at least three years. <br /> P.E. P.E.Registration <br /> Amendment/Review Certification Name of <br /> No. hate Oescripi RequirW P.E. signature State Numhar <br /> 1 -1-22 CaTortland Acquksition No IDFreltas <br /> ontacl Updates <br /> 2 1-19-24 -Year Review,Language No IDFreltas <br /> Idrifying diesel types <br /> added <br /> 3 7-11-24 Language clarifying diesel Catalina Elias CA AGS92 <br /> overflow prevemion <br /> procedures and removal of <br /> drainage valve on <br /> ewndary containment <br /> 4 <br /> Cracks in containment wall have been patched. <br /> -1 <br /> - f <br /> a � P <br />