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Tank and Secondary Containment Assessment Irerracon Lustre-Cal Facility Lodi, CA April 22, 2019 Terracon Project No. NA197014 Table 1 On-site Chemical Usage Table — Lustre-Cal Estimated Name Description Gallons Aluminum Etch Solution 7% wt Sodium Hydroxide Aluminum Etchant Soln 75 al/week <1% (wt) Sodium Hydroxide Aluminum Etchant Etch Rinse Soln 150 al/week 36% Sulfuric Acid Neutralizing Agent 5 al/da 30% Sodium Hydroxide Neutralizing Agent 5 al/da Ammonium Bifluoride 19% wt soln of Acidic "Aluminum Frosting"Agent 15 al/week Chemco 33S Cleaner 20% vol Water Soluble Biodegradable Degreaser 80 al/month Zip Developer Photo Plate Processing 2 al/week Zip Fixer Photo Plate Processing 2 al/week Mea LC Activator Film Developer 0.25 al/week Mea LC Stabilizer Film Fixer 0.25 al/week CPS A7 Screen Wash Screen Cleaning Agent 25 al/month Specialty 740 Soln I Aluminum Cleaning Solution Water Soluble 200 al/month The two rows that are highlighted in yellow are the only chemicals that are associated and located within the area of the active treatment system. All of the others are constituents of the waste water and are therefore mixed in varying quantities within the waste water. This waste water is what is captured in the waste water capture tanks T1 and T2. Piping and Ancillary Equipment: All of the observed piping and check valves were schedule 80 PVC (manufactured by either Spears or Hayward depending). Most of the diameters observed were 2-inch O.D. The above- mentioned pumps are 2 horsepower and can act in tandem or individually, if necessary. The pumps also have secondary containment buckets below them should minor leakage occur. Tank and Secondary Chamber Construction: The waste water capture tanks (T1 and T2) are made of polypropylene and are detailed below in their exact construction. T1 varies from T2 in design by being slightly taller and narrower. They are both of the same design and hold the same volume of 330 gallons when completely full. For this assessment they are assumed to be the same with a flange line, operational 90 percent holding capacity of 300 gallons. The material thickness for the tanks were taken from engineered drawings that the manufacturer previously sent to Terracon. They were also verified in the field in 2011 during the last inspection and assessment. The tanks are 0.332 inches in thickness. Field measurements were taken using calipers that measured to one/thousandth of an inch. Responsive ■ Resourceful ■ Reliable