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Tank Industry Consultants
Water Tank Inspection Standards &
GuidelinesPenni Snodgrass
Sales and Marketing ManagerTank Industry Consultants
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Tank Industry Consultants
American Water Works Association
(AWWA)
National Fire Protection
Association
(NFPA)
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Tank Industry Consultants
AWWA D101-53 (retired) Inspecting and Repairing Steel Water Tanks,
Standpipes, Reservoirs, and Elevated Tanks, for Water Storage
First Edition – 1953 Reaffirmed without revision in 1986 Withdrawn – December, 1998 Currently undergoing complete revision
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Tank Industry Consultants
AWWA D101Inspection of Water Tanks and
Related Facilities
Committee Chair – Chip Stein, TIC
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How AWWA Standards are Developed
Tank Industry Consultants
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Tank Industry Consultants
AWWA Standards are not…
Specifications Endorsement Recommendation
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Tank Industry Consultants
Standards vs Specs
Standards - minimum technical requirements ( i.e. the “what”)
Specifications – the contractual relationships ( i.e. “when” and “by whom” and through standards and supplemental requirements –the “what”)
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Tank Industry Consultants
AWWA Standards are…
Guidelines Solid Base Frequently cited in project specifications A reliable source of information
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Tank Industry Consultants
Standards-Making Process
Standards Committee
Producer Group Consumer Group General Interest
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Standards-Making Process
Committee Consensus Sent to Standards Council, if approved Published for Review and Comment Sent to Executive Committee Published …start the process all over
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Standards Council
Publish
CommitteeConsensus
PublicReview and Comment
ExecutiveCommittee
Five-Year Review/Revision
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Tank Industry Consultants
What’s Happening in the D101 Committee??
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Tank Industry Consultants
Types of Structures
Clearwells Concrete Tanks Bolted Tanks Membrane Covered Reservoirs Stainless Steel Tanks (bolted and welded) Filter Beds Hydropneumatic Tanks (operating at less than 15
psi) Clarifiers Current Market Demand
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Proposed Foreword
Stated Purpose of Standard Asset Management Approach Goal of Sustainability References to C652, D100, D102, D103,
D107, D110
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Proposed Section AElements of Facilities
Nomenclatures Elements
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Proposed Section BInspection of New Construction
Soils/Geotech Documentation/Work-In-Process Evaluation
Reporting Inspections specific to type of construction
♦Welding♦Concrete Placement♦Coatings
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Proposed Section CInspection of Existing Structures
Frequency Coatings Structural Sanitary Safety Tank and Site Security Reporting Requirements
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Inspection Methods
Underwater Tank Evaluation In-Service Cleaning, as it relates to the inspection
of the structure Rafting Commentary Checklist - advantages and
disadvantages of Dive, ROV, and Drained Methods Commentary - Owner Specify Motivation for
having Tank Inspected
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Tank Industry Consultants
Accessories
Cathodic Protection Mixing Systems
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Tank Industry Consultants
Proposed Section DInspection of Existing Tank
Rehabilitation Submittal Review Appurtenance and Welding Repairs Repairs Surface Preparation Emission and Overspray Containment Air Monitoring – Environmental and Personnel Air Safety Coating Application Ventilation during Coating Application Documentation/Work-In-Process Evaluation
Reporting Punch Lists
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Proposed Section EFirst Anniversary Evaluation
Minimum requirements for how this evaluation should be conducted and reported Type – Drained, ROV, Dive Disinfection Reporting
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Tank Industry Consultants
Proposed Section FQualifications
Engineering Firm♦Experience♦Insurance♦Licensed Engineer
Inspector♦Experience♦Climbing Ability♦Association Certifications (NACE, SSPC)
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Proposed Appendices
Bibliography Organizations Cold Weather Operation of Water Tanks Cellular Antennas Considerations Site Selection Tank Style Analysis Tank Sizing Considerations Sample Inspection Forms Inspection Certifications and Associations Commentary
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Tank Industry Consultants
AWWA M42 –Steel Water-Storage Tanks
First Edition – 1988 Latest Revision – 2012 Frequency (3 to 5 years) Inspector Qualifications Inspection Scope AWWA D101 Referenced in Appendix C Revision Chair, Chip Stein, TIC
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Tank Industry Consultants
Steel Water Storage Tanks
Published by McGraw Hill in conjunction with AWWA
Technical Editor – Steve Meier Chapter Author – Chip Stein Chapter Author – Jennifer Coon
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Tank Industry Consultants
NFPA 25 (2017) – Standard for the Inspection, Testing, and Maintenance of
Water-Based Fire Protection Systems 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
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Tank Industry Consultants
NFPA and AWWA Differences
Frequency Site Evaluation (combustible storage, brush, fire
exposure hazard) NFPA addresses all types of tank construction NFPA requirements not found in AWWA
♦Holiday Detection♦Underbottom Ultrasonic Testing (or Coupon Removal)♦Vacuum-Box Testing of Floors (NFPA 22)
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Questions?
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