Ad Hoc Technical Committees

Objectives and Outcomes

1. Determine applicability/scope of the MAHC as it relates to the various aspects/components of Artificial Lagoons.
2. Develop MAHC design, construction, operation, and management standard/best practice recommendations and corresponding Annex and glossary content to include in a Change Request to address Artificial Lagoons.

Methods

1. Review design and operational features of Artificial Lagoons to determine what aspects are within the scope of the MAHC.
2. Identify and review existing state and local codes for Artificial Lagoons.
3. Identify existing Artificial Lagoons to assess for venue-specific design, construction, operation, and management issues and to help determine recommendations.
   1. Assess selected water quality parameters (e.g., turbidity, microbiological) and existing water treatment details
   2. Evaluate and interpret data
   3. Identify key design, construction, operation, or management criteria to adequately address water quality
4. Determine requirements for recirculation systems, water treatment, and filtration needed to meet MAHC water quality parameters.
   1. Microbial
   2. Turbidity/water clarity
   3. Free and combined chlorine
   4. pH
5. Review MAHC bather supervision and safety requirements and determine recommendations
   1. Lifeguards
   2. Barriers/enclosures
   3. Depth markers and markings

Committee Members

Co-Chairs:
Joe Laco, CDC
Michele Hlavsa, CDC

Members:
Jeremy Harper, Southern Nevada Health District
Alice Isley, North Carolina Department of Health and Human Services
Jeff Littlejohn, WSource/Crystal Lagoons
Katie Moore, Texas Department of State Health Services
Alvaro Mendoza, Commercial Energy Specialists, Inc. (CES)
Ken Smith, H2 Pool Services
Bob Vincent, Florida Dept of Health

Objectives and Outcomes

1. Review and evaluate current Model Aquatic Health Code (MAHC) requirements and definitions to determine if surf pools and corresponding design requirements, including filtration, flow rates/turnover times, disinfection are adequately addressed.
2. Develop revisions to the MAHC design and operational standard/best practice recommendations and corresponding Annex content to address identified changes needed to Surf Pool design and operational criteria, as appropriate.

Methods

1. Review MAHC design and operational requirements for Surf Pools
2. Review MAHC water quality parameters
   1. Microbial
   2. Turbidity/water clarity
   3. Free and combined chlorine
   4. pH
3. Determine requirements for recirculation systems and water treatment needed to meet water quality parameters
   1. Filtration
   2. Flow rates
   3. Turnover times
   4. Surface skimming
   5. Inlets
4. Determine requirements addressing health and safety for functional/structural design elements/features
   1. Ramps
   2. Grates
   3. Support columns
5. Identify existing Surf Pools for assessment
   1. Assess selected water quality parameters (i.e. turbidity, microbiological) and existing water treatment detailsM/li>
   2. Evaluate and interpret data
   3. Identify key design criteria to adequately address water quality

Committee Members

Chair: John Luff, Surf Park Central

Members:
Michael Beach or designee, CDC
Allen Clawson, P.E., Cloward H2O
Jim Dunn, Aquatic Development Group
Marco Gonzales, Coast Law Group LLP
George Ivezaj, Kelly Slater Wave Company
Tom Lochtefeld, Surf Loch
Katie Moore, Texas Department of State Health Services
Fernando Odriozola, Wavegarden
Doug Sackett, CMAHC

Objectives and Outcomes

1. Review and evaluate current Model Aquatic Health Code (MAHC) requirements to determine if design requirements, including filtration, flow rates/turnover times, disinfection/secondary disinfection, are adequately addressed.
2. Develop revisions to the MAHC design and operational standard/best practice recommendations and corresponding Annex content to address identified changes needed to Interactive Water Play Venue design and operational criteria, as appropriate.

Methods

1. Review MAHC design and operational requirements for Interactive Water Play Venues
2. Define acceptable water quality parameters for Interactive Water Play Venues
   1. Turbidity
   2. Free and combined chlorine
   3. pH
   4. Determine acceptable water treatment
      1. Type of filtration
      2. Flow rates
      3. Turnover times
      4. Secondary disinfection (UV or ozone system) system design details
         1. UV transmittance (UVT)
3. Identify existing Interactive Water Play Venues for assessment
   1. Assess selected water quality parameters (i.e. turbidity, UVT) and existing water treatment details
   2. Evaluate and interpret data
   3. Identify key design criteria to adequately address water quality

Committee Members

Chair: Ron George, Neptune Benson (retired)

Members:
James Amburgey, Ph. D., UNC Charlotte, NC
Harold Brown, Spear Corporation
Bill Hachmeister, Aquatix
John Paccione, PE, PhD, NYS Department of Health
Dennis Scott, Waterplay
Dominic Shaw, Waterline Studios
Michael Weinbaum, Aquatic Design and Engineering

Objectives and Outcomes

Identify and assess the factors affecting air quality at indoor aquatic facilities, including:

1. Air handling/air distribution system design, effectiveness, and operation
2. Water quality/water chemistry
3. Pool water treatment operation and maintenance
4. Pool types (flat water, agitated water, water features, hot water)
   1. Evaporation rate calculation.
5. Bather load
6. Spectator areas

Methods

1. Define Indoor Air Quality (IAQ) Problem and methods for measurement.
2. Review ASHRAE 62.1
3. Define effective air distribution and consequences of inadequate designs
   1. Develop guidelines for effective air distribution.
4. Develop data collection tool for use in collecting information for pools regarding factors identified in #1 in Objectives and Outcomes above.
   1. Type of air handling system
   2. Designed and installed in accordance with ASHRAE standards
   3. Operational aspects
      1. Designed properly but, not operated properly (i.e. amount of recirculated air vs. introduction of fresh air)
      2. Operated 24 hrs./day vs. turned off/down at night
   4. Air distribution
   5. Type of pool and/or features
      1. Flat water, agitated water/water spray features, hot water
   6. Bather load/use
   7. Water treatment
      1. Type of filtration
      2. UV or ozone system
         1. System design details
      3. Water chemistry
         1. Free and combined chlorine
         2. pH
   8. Building envelope design
      1. Identify building elements that are not conducive to success air distribution effectiveness and IAQ
5. Collect data from pools with and without IAQ problems
   1. Determine number of pools needed for evaluation
   2. Evaluate and interpret data
   3. Identify any key data gaps that should be filled before development of proposed changes to the MAHC
6. Energy Consumption
   1. Fan energy and duct design (lower static pressures reduce operating costs)
   2. Impacts of operating and design conditions.
   3. Heat recovery.

Planned Outcomes

Data-based Change Request

Committee Members

Chair: Ralph Kittler, Seresco

Members:
Michael Beach, CDC
Douglas Sackett, CMAHC
Chip Blatchley, Purdue University
Jason Schallock, Anderson Poolworks
Jeff Nodorft, Councilman-Hunsaker
Stephen Springs, Brinkley Sargent Wiginton Architects
James Harrison, GMB HVAC and pool water filtration designer
Harry Milliken, retired from Desert-Aire
Gary Lochner, Innovent
Sandy Kellogg, Fairfax County Park Authority
Don Baker, Paddock Pools

NOTE: Richard Falk presented the work of this Ad Hoc Committee, “Cyanuric Acid CMAHC Ad Hoc Committee Report” at the World Aquatic Health Conference in Broomfield on October 19, 2017. The work is being written up as a peer-reviewed publication that will inform creation of a 2020 CMAHC Conference Change Request.

Objectives

1. Systematically review the impact of using chlorine stabilizers on aquatic facility operations.
2. Create a balanced summary review of the data for CMAHC membership.

Methods

1. Collect data on the impact of chlorine stabilizers on maintaining free chlorine, chlorine test methods, disinfection, fecal incident response and remediation, and the impact of increasing cyanurate levels on disinfection.
2. Collect data on specific pathogens and inactivation rates at differing cyanurate levels to show the impact of increasing cyanurate levels on inactivation.
3. Evaluate findings related to stabilization versus disinfection byproduct formation from peer-reviewed literature (no more than five articles).

Planned Outcome

1. Publish a systematic review in a peer-reviewed journal.

Future Use of Systematic Review

1. Develop guidance on appropriate stabilizer levels and use (i.e., types of aquatic venues, minimum and maximum levels).
2. Identify key data gaps that should be filled to enable future decision making.

Committee Members

Chair: Chip Blatchley: Purdue University

Members:
Richard Falk: Consumer
Tom Kuechler: Occidental Chemical Corporation
Ellen Meyer: Lonza
Stan Pickens: Retired from Axiall Corporation
Roy Vore: BioLab Inc.

NOTE: The work of this Ad Hoc Committee resulted in the 2017 Change Request 4.6.11-0001 that was passed by CMAHC vote.

Objectives

Review the Change Request (CR 22) submitted in 2015 to add acoustical design criteria to the MAHC for new construction.

1. Consider if and/or what requirements should apply to existing facilities.
2. Prepare a Change Request to add acoustical design criteria to the MAHC including the supporting Annex content for the 2017 MAHC update cycle.

Methods

1. Assess the proposed design requirements and revise/edit as needed.
2. Prepare a write-up explaining the rationale and supporting information for the proposed MAHC code change to include as MAHC Annex information.

Planned Outcome

Submitted 2017 Change Request

Committee Members

Chair: Keely Siebein, Siebein Associates, Inc.

Members:
Carl Nylander, Counsilman-Hunsaker
Brian Harris, Eckel Industries
Bill Holaday, Convergent Technologies Design Group
Yulia Carroll, Centers for Disease Control and Prevention

** Jeffery Madison, RPG Diffusors- founding committee chair (resigned)

NOTE: The work of this Ad Hoc Committee resulted in the 2017 Change Request 4.12.11/5.12.1 that was passed by CMAHC vote.

Objectives

1. Consider the unique nature of float solution and the nature of use of floatation tanks to determine appropriate requirements to protect health and safety of the users.
2. Develop design and operational requirements and corresponding Annex content to include in a Change Request to address floatation tanks in the MAHC.

Methods

1. Review NSF International “Component Certification Specification for Floatation or Sensory Deprivation Systems and Related Equipment (CCS-12804)” for potential use and reference.
2. Review available peer-reviewed literature on pathogens of potential concern, disinfection, and other potential health-related concerns.
3. Review industry standards.
4. Review existing health department guidance materials.

Planned Outcome

Submitted 2017 Change Request

Committee Members

Chair: Douglas Sackett, CMAHC

Members:
Sung Choe/Rich Martin, NSF
Tracynda Davis, CMAHC
Angela Eykelbosh, BC Center for Disease Control
Crash Hoefler, Floatlab
Ashkahn Jahromi, Float on
Jasen Kunz, CDC
Paul Reeves, Washington State Dept. of Health
Bob Vincent, Florida Dept. of Health

Objectives

Review the current CMAHC Bylaws to determine if revisions and/or additions are recommended.

1. Draft a revised Bylaws document and submit to the CMAHC Board of Directors for approval.

Methods

1. Review the CMAHC Bylaws and those of other non-profit organizations and other Bylaw guidance materials/templates to evaluate the completeness of the existing Bylaws.
2. Identify and gather existing CMAHC policies and procedures for potential inclusion in revised Bylaws.

Final Outcome

Revised By-laws were presented by Rick Root to the Board in August 2016, The Board discussed and edited the draft By-laws and officially adopted them in their October 2016 meeting. After legal review, the new by-laws were posted in November 2016.

Committee Members

Chair: Rick Root, World Waterpark Association

Members:
Jim Dingman, City of Plano Health Department
James Wheeler, City and County of San Francisco Recreation and Parks Department
Franceen Gonzales, International Association of Amusement Parks and Attractions
Richard K. Cacioppo, Sr., JD, Center for Public & Lodging Pool Study
Rick Fuller, Hyland Hills Park and Recreation District
Roy R. Fielding, University of North Carolina at Charlotte
Nicole Van Winkle, Counsilman Hunsaker
Jennifer Hill, Hawaiian Falls Water Park
Jasen Kunz, CDC- CMAHC Board representative

NOTE: The work of this Ad Hoc Committee was revised by a subgroup of the committee and submitted as 2017 Change Requests 4.7.3.2.2.2-0001, 4.7.3.2.2.2-0002, 4.7.3.2.2.2-0003, and 4.7.3.2.2.3-0001. Change Requests 4.7.3.2.2.2-0003 and 4.7.3.2.2.3-0001 were passed by CMAHC vote. Change Requests 4.7.3.2.2.2-0001, and 4.7.3.2.2.2-0002 were not passed by CMAHC vote.

Objectives

1. Develop guidance and supporting data to enable appropriate sizing of chlorine feed equipment.
2. Sizing requirements need to specify the timeframe within which the feed equipment must be able to satisfy the chlorine dosing required.
3. Prepare a Change Request to revise chlorine dosing criteria in the MAHC including the supporting Annex content for the 2017 MAHC update cycle

Methods

1. Collect data on chlorine usage in real world pool situations under different environmental and operational conditions.
2. Analyze collected data and develop chlorinator sizing requirements based on data analysis.
3. Prepare a write-up explaining the rationale and supporting information for the proposed MAHC code change to include as MAHC Annex information.

Planned Outcome

Collect and/or analyze appropriate data to serve as foundation for new Change Request.

This Committee developed an interim progress report in 2015 that was used to develop CR39-2015, which was not passed by the membership at the 2015 Biennial Conference.

Chlorinator Sizing Workgroup Interim Progress Report

Committee Members

Chair: Douglas Sackett, CMAHC

Members:
Lars Hagen, Aquacal Autopilot
Jim Mock, Ecolab
Stephanie Fleming, De Nora Tech
Darrel Graziani, Florida Department of Health
Rick Coffey, Team Horner
Connie Centrella, Keiser University
Kevin Schaefer, NSF International