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<br />August 14, 2025 <br /> <br />Long Painting Company <br />Shaun McDeavitt <br />21414 68th Ave S. <br />Kent, WA 98032 <br /> <br /> <br />Subject: Crack Repairs <br />Project: Everett WFP <br /> <br /> <br />Shaun: <br /> <br />This letter is intended to provide an overview of options discussed for further consideration to <br />repair cracks. These cracks were visibly apparent outside the walkway; they could be tracked <br />and followed up and over the walkway to the inside of the tank. Identified here below are three <br />repair methods that can be chosen for the appropriate circumstance. <br /> <br />1. Dynamic Cracks <br />a. Clean areas per SSPC-SP 1 prior to starting mechanical preparation. <br />b. Route out crack to a minimum ¼” X ¼” completely clean and vacuum all debris. <br />c. Apply Series 21over any exposed concrete and ensure lining fully coats around <br />corner and into the routed-out crack. Take care not to fill crack with Series 21. <br />d. Source and fill cracks with NSF approved elastomer caulking, consult mfg. or <br />representatives of sealant mfg. to ensure the right sealant is selected for this detail. <br /> <br />2. Static Cracks <br />a. Clean areas per SSPC-SP 1 prior to starting mechanical preparation. <br />b. Route out crack to a minimum ¼” X ¼”, completely clean and vacuum all debris. <br />c. Fill crack using Tnemec Series 215 epoxy putty flush to plane. <br />d. Apply Tnemec Series 21 over areas treated with Series 215 coat up and onto <br />existing Series 21 lining by 1” to 2”. Mask these areas to delineate a termination <br />and sand with 80-100 grit sandpaper to produce a dull matte surface with a dense <br />1-2 mil profile. Clean all areas to be coated by solvent wiping per SSPC-SP 1 just <br />prior to coating. Ensure all repair areas satisfy original specified dry film thickness. <br /> <br />3. Static Cracks with Potential Moisture Ingress. <br />a. Clean areas per SSPC-SP 1 prior to starting mechanical preparation. <br />b. Route out crack to a minimum ¼” X ¼”, completely clean and vacuum all debris. <br />c. Saw-cut 1/8” X 1/8” keyway out 3” of both sides of crack. <br />d. Fill crack & keyways using Tnemec Series 215 epoxy putty flush to plane. <br />e. Apply Tnemec Series 21 over areas treated with Series 215 to include crack detail <br />and saw-cuts. Coat up and on to existing Series 21 lining by 1” to 2”. Mask these <br />