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Hazardous Waste Tank <br /> System Integrity Report <br /> For <br /> HMT Inspection <br /> The Kraft Heinz Company <br /> Stockton CA February 17,2021 <br /> , Page 8 of 34 <br /> SIGNIFICANT FINDINGS (CONT'D.) <br /> ABOVEGROUND USED HAZARDOUS WASTE AND FACILITY (CONT'D.): <br /> SECONDARY CONTAINMENT EVALUATION (Hazardous Waste Tank Facility): The <br /> 5,800-gallon Hazardous Waste Tank rests within a secondary 6,200-gallon polyethylene <br /> open-top tank situated in a concrete tertiary containment area. The secondary tank has <br /> a thickness of 0.493 inch (measured with a caliper). No records indicating the original <br /> nominal thickness were available for comparison. The secondary tank has sufficient <br /> capacity for the total volume of the primary tank. The secondary tank has a <br /> manufactured heavy-duty tarp cover installed that is designed to prevent rainwater <br /> entering into the interstitial space. These details meet the requirements for secondary <br /> containment per EPA regulations for the maximum 72-hour clean-up period for spills and <br /> meets DTSC requirements for secondary containment per 22 CCR, §66265.193. This <br /> tank is situated outside but has a protective cover installed, and as such, is not <br /> necessarily subject to rainfall or other run-off accumulation per the EPA 25-year, 24-hour <br /> maximum rainfall / runoff accumulation requirement for the containment area. <br /> The wash tanks are situated under an awning, thereby having only partial exposure to <br /> the weather. Rainwater and any possible leakage or spillage from the wash tanks or <br /> piping flow to a slot drain beneath the tanks and empty into the concrete containment <br /> area. The concrete containment area has an approximate capacity of 6,449 gallons. <br /> Since the wash tanks and piping flow to a secondary containment structure open to the <br /> atmosphere, the concrete containment is subject to rainfall or other run-off accumulation <br /> per the EPA 25-year, 24-hour maximum rainfall / run-off accumulation requirement for <br /> the containment area at 3.35 inches of water. The secondary containment structure is <br /> suitably large enough to contain the volume of these tanks and maximum rainfall <br /> requirement (3,236 gallons in this case). <br /> NDTRPTNE.DOT REV 2 23264941 Hazardous Wast Tank r3(Rev 1).doc 3/16/2021 1:52 PM <br />