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pCORROSION PROBE, INC. <br /> THE COMPLETE ENGINEERING APPROACH - FROM DETECTION TO CORRECTION <br /> December 13, 2021 <br /> Via E-mail: CGish@BrwnCald.com <br /> Mr. Casey Gish <br /> Brown and Caldwell <br /> Seattle, WA <br /> Subject: Revised Proposal for Assessment of Concrete and Embedded Steel Members — City of <br /> Everett,WA <br /> Dear Mr. Gish: <br /> Corrosion Probe, Inc. (CPI) is pleased to provide this proposal for the subject services. As part of a water <br /> filtration plant improvements project, Brown and Caldwell (BC)has asked CPI to perform assessment of <br /> concrete and embedded steel members in a splitting structure within the plant, and to provide <br /> corrosion/materials design input and consulting. The structure reportedly has a humid, chlorine-rich <br /> atmosphere, with open channels and fluctuating water levels. To fulfill this request, CPI proposes the <br /> following scope of work and cost. <br /> Scope of Work <br /> A. Desktop Review—Review available design, construction, and operational information about the <br /> structure. <br /> B. Site Work—Visit the water filtration plant to perform inspection and assessment of concrete and <br /> embedded steel members within the splitting structure. Deteriorated areas of concrete surfaces will <br /> be probed and measured for cement paste loss, and pH measurements will be taken as appropriate. <br /> Concrete powder samples will be collected for subsequent laboratory analysis, as warranted by the <br /> above inspection and testing. Corroded steel components will be measured for thickness loss using <br /> calipers. Corrosion deposits will be scraped from corroded areas for subsequent compositional <br /> analysis. <br /> C. Laboratory Analysis—Collected corrosion deposit and powder samples will be analyzed at CPI's <br /> affiliate, Corrosion Testing Laboratories. <br /> D. Reporting—Prepare and submit a formal, written report describing the site work performed and <br /> the associated field and laboratory analysis results and including recommendations for <br /> rehabilitation or replacement and methods for coatings-related repairs. <br /> E. Design Input—Provide recommendations to repair,replace,or no action for all corroded materials <br /> observed during the site visit. BC will provide a list of corroded components and materials in the <br /> existing facility to be observed by CPI during the site visit. Where protective coatings or <br /> specialized grout or concrete products are part of a repair recommendation,provide specifications <br /> CORPORATE HEADQUARTERS: <br /> 12 INDUSTRIAL PARK ROAD•P.O.BOX 178•CENTERBRQOK,CT 06409-0178•PHONE:[860)767-4402•FAX:[8601 767-4407•WWW.CPIENGINEERING.COM <br /> ALABAMA • ARKANSAS * DELAWARE • FLORIDA • GEORGIA • MAINE <br /> MASSACHUSSETTS • NEW JERSEY • NORTH CAROLINA • OHIO • PENNSYLVANIA • TEXAS • WISCONSIN <br />