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MORRIS ENGINEERING & ASSOCIATES, INC. <br /> CONSULTING ENGINEERS <br /> Secondary Containment <br /> As part of our tank system integrity assessment we inspected the secondary containment that is surrounding <br /> the tanks in the Wastewater Discharge & Treatment Area. Please reference our Secondary Containment Layout <br /> for the layout of the secondary containment areas. The assessment of the secondary containment follows the <br /> guidelines presented in the California Code of Regulations,Chapter 15,Article 10,Section 66265.193. <br /> Based on the requirements in the CCR, the secondary containment must be designed to contain 100 percent of <br /> the capacity of the largest tank within its boundary. The outdoor area of the secondary containment is <br /> protected by a metal canopy which will divert any rain water away from the secondary containment. Therefore, <br /> the requirement to contain precipitation from a 25-year storm is not applicable. There is a small cutout in the <br /> canopy; however,it is centered over an area that is not part of the secondary containment for this system and <br /> therefore should not have a detrimental effect to the secondary containment system. <br /> As part of our assessment,we conducted a visual observation of the secondary containment. This visual <br /> observation consisted of inspecting the epoxy coating for signs of wear and checking for structural cracks in the <br /> concrete secondary containment. Based on our observations,it appeared that the epoxy coating was worn and <br /> will need to be reapplied prior to converting the system to a Zinc-Phosphate solution. We recommend that an <br /> epoxy coating specialist be contacted prior to reapplying the epoxy to confirm the requirements for the coating. <br /> Additionally,some cracks were noticed in the secondary containment. These cracks should be repaired prior to <br /> converting to a Zinc-Phosphate solution to ensure that the secondary containment is capable of containing any <br /> potential hazardous spills. <br /> I <br /> Please see our attached secondary containment checklist for additional information. <br /> 1300 INDUSTRIAL ROAD, SUITE 14,SAN CARLOS,CA 94070, (650)595-2973 FAX(650) 595-2980 <br /> Email: lee@morriseng.com <br />