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SPILL PREVENTION,CONTROL AND COUNTERMEASURE DISCHARGE PREVENTION MEASURES,CONTROLS,AND <br /> PLAN(SPCC) COUNTERMEASURES <br /> Pacific Ethanol,Stockton. <br /> 6.11.2 Secondary Containment[112.8(c)(2)] <br /> Spillage from the tanks at the Facility will drain to PES' sump and collection system. The sump and <br /> collection system would thus effectively serve as a tertiary containment system and prevent any release <br /> of oil from reaching navigable waters. The concrete containment are sufficiently impervious for the oils <br /> stored at the Facility. <br /> Table 5-1 shows the containment volume for the bulk storage containers that have concrete or <br /> polyethylene containments. <br /> 6.11.3 Drainage of Uncontaminated Rainwater from Diked Areas[112.8(c)(3)] <br /> There are no automatic drainage valves or pumps located in the tank farm. Storm water accumulated in <br /> the tank farm containment is only emptied via a manual pump when it has been verified that the storm <br /> water has not been contaminated with oil or oil containing product. Storm water(oil free), with and <br /> without trace ethanol, will be released from the tank farm to the process condensate tank when there are <br /> no visual signs of oil (e.g. sheen). Deviation from this process must undergo management review. <br /> When such transfers are necessary, storm water is manually pumped from the containment area <br /> into the process condensate tank. Storm water releases diverted to the storm drain system must be <br /> documented in accordance with PES's Industrial SWPPP. <br /> 6.11.4 Corrosion Protection of Completely Buried Metallic Storage Tanks <br /> (112.8(c)(4)] <br /> There are no buried metallic storage tanks at the Facility; therefore, this provision does not apply. <br /> 6.11.5 Corrosion Protection of Partially Buried or Bunkered Metallic Tanks <br /> (112.8(c)(5)] <br /> There are no partially buried metallic storage tanks at the Facility; therefore, this provision does not apply <br /> 6.11.6 Aboveground Tank Periodic Integrity Testing[I 12.8(c)(6)] <br /> ASTs are routinely observed by Facility personnel during operating hours. Tank conditions are also <br /> documented during monthly Facility inspections. Formal visual tank inspections are performed monthly to <br /> assess tank integrity. The visual inspection includes, but is not limited to, the following: <br /> ■ Evidence of leaks or spills <br /> Corrosion deterioration <br /> 1111 Foundation deterioration <br /> • Electrical and hydraulic equipment leaks or spills <br /> • Tank, drum, and tote storage leaks or spills <br /> to Containment structures <br /> Visual inspection plus placement of storage tanks on an impervious barrier or elevated between the <br /> container and the ground provides adequate environmental protection. <br /> Steel Tank Institute (STI)-Standard SP001 recommends tanks with a capacity of 5,000 to 30,000 gallons <br /> to undergo formal external integrity inspections every 20 years. These inspections will be completed by <br /> an STI-certified inspector. <br /> www arm com Project No:0453993 Pacific Ethanol 28 September 2018 Page 26 <br />