Tank Industry Consultants AWWA Tank Standard D101 The Development of the “Inspection of Water Tanks and Related Facilities” Standard Chip Stein, P.E. Managing Principal Tank Industry Consultants

AWWA Standards are not… l Specifications l Endorsement l Recommendation

Tank Industry Consultants Standards vs Specs l Standards - minimum technical requirements ( i.e. the “what”) l Specifications – the contractual relationships ( i.e. “when” and “by whom” and through standards and supplemental requirements – the “what”)

Tank Industry Consultants AWWA Standards are… l Guideline l Solid Base l Frequently cited in project specifications l A reliable source of information

Tank Industry Consultants Standards-Making Process Standards Committee Producer Group Consumer Group General Interest

Tank Industry Consultants Standards-Making Process l Committee Consensus l Sent to Standards Council, if approved l Published for Review and Comment l Sent to Executive Committee l Published l …start the process all over

Tank Industry Consultants Five-Year Review/Revision

Tank Industry Consultants Water Storage Tank Standards

Tank Industry Consultants American Water Works Association AWWA Chip Stein, P.E. Chair Chip SteinChip Stein, P.E. Steve Meier, P.E., S.E. Patrick Brown, P.E. Chip Stein, P.E., Vice Chair

Tank Industry Consultants Current AWWA Steel Tank Standards l D – Welded Carbon Steel Tanks for Water Storage l D – Coating Steel Water-Storage Tanks l D – Factory-Coated Bolted Steel Tanks for Water Storage l D – Impressed Current Cathodic Protection l D – Sacrificial Anode Cathodic Protection l D – Composite Elevated Tanks for Water Storage l D – Aluminum Dome Roof l C – Disinfection

Tank Industry Consultants Standards, Manuals, and Guidelines for Inspection of Water Storage Tanks

Tank Industry Consultants AWWA D101 Inspection of Water Tanks and Related Facilities l Last Revised – 1953 l Reaffirmed without revision – 1986 l Withdrawn – December, 1998 l Undergoing complete revision l Subcommittee Chair – Chip Stein

Tank Industry Consultants What’s Happening in the D101 Committee??

Tank Industry Consultants Types of Structures l Clearwells l Concrete Tanks l Bolted Tanks l Membrane Covered Reservoirs l Stainless Steel Tanks (bolted and welded) l Filter Beds l Hydropneumatic Tanks (operating at less than 15 psi) l Clarifiers l Current Market Demand

Tank Industry Consultants Proposed Foreword l Stated Purpose of Standard l Asset Management Approach l Goal of Sustainability l References to C652, D100, D102, D103, D107, D110

Tank Industry Consultants Proposed Section A Elements of Facilities l Nomenclatures l Elements

Tank Industry Consultants Proposed Section B Inspection of New Construction l Soils/Geotech l Documentation/Work-In-Process Evaluation Reporting l Inspections specific to type of construction  Welding  Concrete Placement  Coatings

Tank Industry Consultants Proposed Section C Inspection of Existing Structures l Frequency l Coatings l Structural l Sanitary l Safety l Tank and Site Security l Reporting Requirements

Tank Industry Consultants Inspection Methods l Underwater Tank Evaluation l In-Service Cleaning, as it relates to the inspection of the structure l Rafting l Commentary Checklist - advantages and disadvantages of Dive, ROV, and Drained Methods l Commentary - Owner Specify Motivation for having Tank Inspected

Tank Industry Consultants AccessoriesAccessories l Cathodic Protection l Mixing Systems

Tank Industry Consultants Proposed Section D Inspection of Existing Tank Rehabilitation l Submittal Review l Appurtenance and Welding Repairs l Repairs l Surface Preparation l Emission and Overspray Containment l Air Monitoring – Environmental and Personnel Air l Safety l Coating Application l Ventilation during Coating Application l Documentation/Work-In-Process Evaluation Reporting l Punch Lists

Tank Industry Consultants Proposed Section E First Anniversary Evaluation l Type – Drained, ROV, Dive l Disinfection l Reporting Minimum requirements for how this evaluation should be conducted and reported

Tank Industry Consultants Proposed Section F Qualifications l Engineering Firm  Experience  Insurance  Licensed Engineer l Inspector  Experience  Climbing Ability  Association Certifications (NACE, SSPC)

Tank Industry Consultants Proposed Appendices l Bibliography l Organizations l Cold Weather Operation of Water Tanks l Cellular Antennas Considerations l Site Selection l Tank Style Analysis l Tank Sizing Considerations l Sample Inspection Forms l Inspection Certifications and Associations l Commentary

Tank Industry Consultants AWWA M42 Steel Water-Storage Tanks l First Edition – 1988 ● E. Crone Knoy (deceased), Technical Editor l Chapter Author – Chip Stein l Revised in 2012 by Chip Stein Chip Stein

Tank Industry Consultants Steel Water Storage Tanks l Published by McGraw Hill in conjunction with AWWA l Technical Editor – Steve Meier l Chapter Author – Chip Stein l Chapter Author – Jennifer Coon

Tank Industry Consultants National Fire Protection Association

Tank Industry Consultants NFPA 25 (2011) – Standard for the Inspection, Testing, and Maintenance of Water-Based Fire Protection Systems l Frequency  Daily – Heating System  Weekly – Water Temperature  Monthly – Water Level  Quarterly – Tank Exterior, Support Structure, Catwalks/Balconies, Ladders, Site  Annually – Expansion Joints, Coatings  Interiors – 3 years vs 5 years

Tank Industry Consultants NFPA and AWWA Differences l Frequency l Site Evaluation (combustible storage, brush, fire exposure hazard) l NFPA addresses all types of tank construction l NFPA requirements not found in AWWA  Holiday Detection  Underbottom Ultrasonic Testing (or Coupon Removal)  Vacuum-Box Testing of Floors (NFPA 22)

Tank Industry Consultants What does this mean to ME?

Tank Industry Consultants Questions???Questions???