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Hazardous Waste Tank System Integrity Report For HMT Inspection The Kraft Heinz Company Stockton CA February 17,2021 , Page 7 of 34 SIGNIFICANT FINDINGS (CONT'D.) ABOVEGROUND HAZARDOUS WASTE TANK AND FACILITY (CONTD.): TANK: The Hazardous Waste Tank is a vertical, single-wall polyethylene tank installed in 2012 (per client). The tank has no record of tightness testing when put into service at this location but has seen continuous service since 2012 with no evidence of leakage and no evidence of leakage was observed during this inspection. The tank has a thickness of 0.491 inch (measured with a caliper). No records indicating the original nominal thickness were available for comparison. This tank has a nominal capacity of 5,800 gallons. This tank stores acid waste rinse water that is manually pumped from the rinse tanks with a pneumatic pump through 2-inch PVC piping and circulated along with the injection of citric acid or caustic acid to neutralize the water to a pH of 7.5. There is an automated control panel installed near the tank that controls and regulates the neutralization process. The tank has a target board level indicator that is monitored during operation of the tank. The tank and associated piping is inspected daily for leaks, with a log of inspections maintained and available. There is no automatic leak detection or alarms present. The tank is visually monitored when in use and there are no automated filling or emptying operations. The tank is then pumped into the Stockton, CA city sewer approximately every eight (8) days. Visual (VT) inspection performed on the external tank details found them in acceptable condition at this time. Internal inspection was not performed to evaluate the general condition of the internal tank details. The tank is well restrained and anchored from seismic activity and flotation within the concrete tertiary containment. The four (4) rinse tanks present in the seed wash area are vertical, single-wall, open-top stainless steel tanks. These tanks have a nominal capacity of 616 gallons each. The tanks are utilized as seed wash tanks containing 3% muriatic acid and water, 3% caustic acid and water, 10% liquid TSP and water, and a water rinse tank. Visual (VT) inspection performed on the external tank details found them in acceptable condition at this time. No evidence of corrosion was noted. The tanks are bolted to the foundation beneath. SUPPLY AND RETURN PIPING EVALUATION: All supply and return piping for the Hazardous Waste Tank are 2-inch single-wall polyvinyl chloride (PVC) piping. The piping is visually inspected daily and a log of inspections is available. The piping from the pneumatic pump rests within a slot drain that drains directly into the concrete tertiary containment area for the Hazardous Waste Tank. Visual (VT) inspection of piping found it in acceptable condition with no leaks present at this time. NDTRPTNE.DOT REV 2 23264941 Hazardous Wast Tank r3(Rev 1).doc 3/16/2021 1:52 PM