2012-054 RES AWARDING CONTRACT FOR REHABILITATION OF EAST ELEVATED STORAGE TANK TO CLASSIC PROTECTIVE COATINGS INC

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JJrlr-Jt' O/IVHIJC IVU. J January 1, 2007 Section 5: Blast Cleaning Methods and Operation the film thickness of coating applied over the surface profile is in Paragraphs A7 and AS of Appendix A. 5.1 Clean, dry compressed air shall be used for nozzle blasting. Moisture separators, oil separators, traps, or other equipment may be necessary to achieve this requirement. 5.2 Any of the following methods of surface prepara- tion may be used to achieve a commerciai blast cleaned surface: 5.2.1 Dry abrasive blasting using compressed air, blast nozzles, and abrasive. 5.2.2 Dry abrasive blasting using a closed-cycle, recir- culating abrasive system with compressed air, biast nozzle, and abrasive, with or without vacuum for dust and abrasive recovery. 5.2.3 Dry abrasive blasting using a closed-cycle, recircu- lating abrasive system with centrifugal wheels and abrasive. 5.3 Other methods of surface preparation (such as wet abrasive blast cleaning) may be used to achieve a commer- cial blast cleaned surface by mutual agreement between those responsible for establishing the requirements and those responsible for performing the work. Information on the use of inhibitors to prevent the formation of rust immediately after wet abrasive blast cleaning is in Paragraph A5 of Appendix A. Section 6: Blast Cleaning Abrasives 6.1 The selection of abrasive size and rype shall be based on the type, grade, and surface condition of the steel to be cleaned, the type of blast cleaning system used, the finished surface to be produced (cleanliness and surface profile [rough- ness]), and whether the abrasive will be recycled. 6.2 The cleanliness and si2e of recycled abrasives shall be maintained to ensure compliance with this standard. 6.3 The blast cleaning abrasive shall be dry and free of oil, grease, and other contaminants as determined by the test methods found in SSPC-AB 1, SSPC-AB 2, and SSPC-AB 3. 6.4 Any limitations on the use of specific abrasives, the quantity of contaminants, or the degree of allowable embed- ment shall be included in the procurement documents (project specification) covering the work, because abrasive embedment and abrasives containing contaminants may not be accept- able for some service requirements. Additional information on abrasive selection is in Paragraph A6 of Appendix A. 6.5 When a coating is specified, the cleaned surtace shall be roughened to a degree suitable for the specified coatina svstem. Additional information on surface profile and Section 7: Procedures Following Blast Cleaning and Immediately Prior To Coating 7.1 Visible deposits of oil, grease, or other contaminants shail be removed according to SSPC-SP 1 or another method agreed upon by those parties responsible for establishing the requirements and those responsible for performing the work. 7.2 Dust and loose residues shall be removed from prepared surtaces by brushing; blowing off with clean, dry air; vacuum cleaning; or other methods agreed upon by those responsible for establishing the requirements and those responsible for performing the work. 7.2.1 The presence of toxic metals in the abrasives or coating being removed may place restrictions on the methods of cleaning permitted. The chosen method shall comply with all applicable regulations. 7.2.2 Moisture separators, oil separators, traps, or other equipment may be necessary to achieve clean, dry air. 7.3 After blast cleaning, any remaining surface imperfec- tions (e.g., sharp fins, sharp edges, weld spatter, burning siag, scabs, slivers) shall be removed to the extent required by the procurement documents (project specification). Any damage to the surface profile resulting from the removal of surface impertections shall be corrected to meet the requirements of Paragraph 6.5. Additional information on surface impertections is in Paragraph A4 of Appendix A. 7.4 Immediately prior to coating application, the entire surface shall comply with the degree of cleaning specified in this standard. Any visible rust that forms on the surface of the steel after blast cleaning shall be removed by recleaning the rusted areas before coating. Information on chemical contamination, rust-back (rerusting), and the effect of dew point (surface condensation) is in Paragraphs A9, A10, and A11 of Appendix A. Section 8: Inspection 8.1 Work performed and materials supplied under this standard are subject to inspection by a representative of those responsible for establishing the requirements. Materials and work areas shall be accessible to the inspector. The proce- dures and times of inspection shall be as agreed upon by those responsible for establishing the requirements and those responsible for performing the work. 8.2 Conditions not complying with this standard shall be corrected. In the case of a dispute, an arbitration or settlement 3