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bond <br /> Poly Tank Wastewater Sample Analysis Results <br /> Contaminant EPA Method Concentration (ppm) <br /> Total Oil and Grease 1664B 1,340 <br /> Barium 6020/STLC/TCLP 0.9/ND/0.6 <br /> Chromium 6020/STLC/TCLP 2.7/0.21/0.06 <br /> Copper 6020/STLC/TCLP 13/0.14/N D <br /> Molybdenum 6020/STLC/TCLP 0.6/ND/ND <br /> Nickel 6020/STLC/TCLP 18/2.03/0.21 <br /> Vanadium 6020/STCL/TCLP 0.7/0.05/ND <br /> Copper 6020/STLC/TCLP ND/0.14/ND <br /> Zinc 6020/STLC/TCLP 6.2/0.49/0.65 <br /> Notes: <br /> ppm =parts per million <br /> ND = Non-detect <br /> STLC=Soluble Threshold Limit Concentration <br /> The pH of the wastewater was measured as 9.9 using EPA Method 9040B. The Certified Analytical <br /> Report is located in Appendix K with the Safety Data Sheet of the sodium hydroxide cleaning <br /> product. <br /> Based upon the characteristics of the wastewater described above and the composition of the tank <br /> system materials, the wetted materials in the Poly Tank System are compatible with the waste <br /> stream. <br /> 7. Corrosion Protection Measures <br /> Components of the Poly Tank System that come in contact with the waste stream are fabricated of <br /> corrosion-resistant materials or are sufficiently protected from corrosion. The AST, piping, and <br /> ancillary equipment are made of materials that are resistant to chemical attack in this application. <br /> The estimated annual corrosion rate is negligible for the materials used in the Poly Tank System. <br /> GHD I Engineering Assessment and Certification of Integrity of the 1,550-Gallon Polyethylene Waste Tank System 111189093(2)1 Page 6 <br />