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"BLASTOX" (TM) IS REQUIRED TO ENSURE SATISFACTORY TOXICITY <br />CHARACTERISTICS TESTING. Prior to start-up of the project, samples of the <br />Contractor's selected abrasive and/or abrasive/admixture shall be submitted to <br />the Engineer for testing and approval. Random field testing of the abrasive shall <br />be done, as directed by the Engineer to ensure the abrasive used complies with <br />these requirements. <br />C. The use of a recyclable abrasive, such as steel grit, is neither specifically <br />encouraged nor prohibited. Contractor's requesting the use of a recyclable <br />abrasive must comply with the specified mil profile. Waste generated by this <br />method of abrasive blasting will be considered Hazardous Waste and as such <br />must be disposed of accordingly. <br />PART 3 EXECUTION <br />3.01. EXAMINATION, INSPECTION AND FIELD QUALITY CONTROL <br />A. Thoroughly examine areas and surfaces scheduled to be painted as well as <br />conditions under which coating systems are to be applied before starting work. <br />Notify Engineer of areas or conditions that are not acceptable. Do not begin <br />surface preparation or application until unacceptable areas or unsatisfactory <br />conditions have been corrected. <br />B. Inspection will be performed prior to and following the abrasive blasting or power <br />tool cleaning and following each coat. Strip and remove defective coats, prepare <br />surfaces and recoat. Successive coats shall only be applied following approval of <br />previous coat or surface preparation. <br />C. Control and check dry film thicknesses and integrity of coatings. <br />D. Measure dry film thickness with calibrated thickness gauge. Dry film thicknesses <br />may be checked with Elcometer or Positector 2000. <br />E. Check wet film thickness before coating cures on concrete or non-ferrous metal <br />substrates. <br />3.02. PROTECTION OF SURFACES NOT SCHEDULED TO BE COATED <br />A. Protect surrounding areas and surfaces not scheduled to be coated from <br />damage during surface preparation and application of coatings. <br />B. Immediately remove coatings that fall on surrounding areas and surfaces not <br />scheduled to be coated. <br />C. Protect following surfaces from abrasive blasting by masking, or other means: <br />1. Threaded portions of valve and gate stems <br />2. Machined surfaces for sliding contact. <br />3. Surfaces to be assembled against gaskets. <br />4. Surfaces of shafting on which sprockets are to fit. <br />5. Surfaces of shafting on which bearings are to fit. <br />6. Machined surfaces of bronze trim, including those slide gates. <br />7. Cadmium -plated items except cadmium -plated, zinc -plated, or <br />sherardized fasteners used in assembly of equipment requiring abrasive <br />blasting. <br />P05367-2016-000 / Mounds View 09 96 20 - 8 PRESSURE VESSEL COATING <br />2019 WTP Rehabilitation SYSTEMS <br />