1 / 31

Aquatic Design & Engineering Mark Mariano PE CPO

2019 Vermont Parks & Rec Association 76 th Annual Conference. Aquatic Design & Engineering Mark Mariano PE CPO. Goals and Objective: Provide you with the yearly maintenance tips on major pool components to extend the life of your pool.

mdupont
Download Presentation

Aquatic Design & Engineering Mark Mariano PE CPO

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. 2019 Vermont Parks & Rec Association 76th Annual Conference Aquatic Design & EngineeringMark Mariano PE CPO

  2. Goals and Objective: • Provide you with the yearly maintenance tips on major pool components to extend the life of your pool. • Provide information on the proper products required for maintenance. • Provide approximate costs for replacement or repair of components. • Provide approximate time frames for repair / replacement on pool and the critical path to take to replace a pool. • Case study on recent replacements. 2019 Vermont Parks & Rec – Conference

  3. Weston & Sampson is a multi-disciplinary engineering firm that has been in existence since 1899 serving primarily the municipal market. We have over 600 employees in 15 offices in 12 different states from Vermont to Florida. In addition to our aquatic engineering services we provide: • Landscape Architecture Athletic and Sports Field Design Water and Wastewater Site Civil Development Municipal Facility Design GIS Mapping Geotechnical Hazardous waste Renewable energies Construction Services (CMR) FUN FACT: First Pool Weston & Sampson Designed – 1935 – Town of Durham NH – Historical Outdoor Pool at University of New Hampshire - Durham

  4. Background • Growing up in a construction family, I have personally installed almost 1000 above-ground, inground, residential / commercial pools. • Earned a Civil Engineering Degree from Umass Amherst. • Managed the construction of treatment plants and commercial pools for Weston & Sampson CMR • Project Manager at Weston & Sampson Engineers - Aquatic Design and Engineering Division since 2014.

  5. Maintenance Features of the Pool: • Topics to be covered: • Extending the Life of the Pool: • Pool Equipment Mechanical Maintenance • Pool Structure & Shell Maintenance

  6. Extending Maintenance of the Pool: • Filters • Pumps • Chemical Treatment • Pool Shells

  7. Sand Filters • Filter Sand Life Span: • 8 – 10 years, depending on use • Replace Filter units every 20-25 years. • Monitor Sand Life: • Start up at the beginning of each year open the • filter manway to inspect sand: • Before opening, have a spare set of manway • seals or cover seals. Replace seals after opening. • Most seals are $20-$150. Its good to have some spares in storage. • Check Sand Levels. Make sure the life guards haven’t been backwashing the sand to sewer. Refer to O&M for Sand Depth. • Examine Sand: • If sand is course and angular, sand is still good and has more life. • If sand is smooth, feels like fine beach sand, sand is worn out, and should be scheduled for replacement. If filter manufacturer is no longer in existance, put it on the capital upgrade list

  8. Ways to extend media life: • Start of each season, check sand and rake out sand bed • Backwash to the required manufacturers flow rate. Higher volumes of water will flush sand out of the tank • Backwash as manufacturer requires, 7-10 PSI differential. Not just on a set schedule. • Time To Change: • When filter is in operation: • After a backwash there is still a 7-12 PSI differential between influent gauge and effluent gauge. • Occurrences of cloudy water, with High Suspended solids count Make sure you have an manufacturers Operation & Maintenance Manual Available in the Equipment room

  9. Vacuum DE Filters (Diatomaceous Earth Filters) • Inspect filter elements • Replace any damaged cloth elements • Clean tank, removing all left over • DE filter from tank. • Lubricate submerged valves. • Inspect Coating on Concrete • or fiberglass tank. • DE material shall be handled with care, and proper respirators. Refer to OSHA requirements.

  10. Pumps • Pump Life Span – 10 – 12 years. • Lubricate pump bearings. • Check for leaks in the seals. • Paint pump impeller housing. Not over the model no. tag. Use an Epoxy Paint • Monitor pump motor temperature. • Check voltages to pumps: 10% change could effect the life of the motor • Pump Trouble Shooting: • Leaking: • Replace the shaft packing or seal. • Winding or Loud Hum. Motor bearing issues. • Replace Motor • Pump sounds like gravel is in the system or shaking. • Pump is Cavitating: • Replace Impeller • Check for Air into the system. • Check for clogs or obstructions in piping or basket. • Try to replace the vacuum gauge and pressure gauges yearly. If budget allows, keep a spare motor in storage

  11. Chemical Controllers / Chemical Feed • Replace Probes every 2 years. • Store probes at seasons end in manufacturers recommended solution. • Clean probes every month, per manufacturers requirements. • Re-calibrate / check calibration on unit once a week • Replace controller unit every 10-12 years. • Replace Chemical Feed Lines ever 2-3 years. • Replace inner pump head tubing every year. • Replace chemical feed pump / CO2 • Regulator every 5-8 years. • Make sure you feeder is connected to the • Controller at all times, NEVER BYPASS.

  12. Collector Tank • Lubricate Valves, and operate them • Tighten all modulation valve arms and floats. Replace as necessary. • Check tightness of all valves and link seals. • Check condition of tank finish and determine if epoxy painting is required. • Check auto fill sensor (if exists) • This is a confined space, proper OSHA procedures shall be implemented.

  13. Painted Pools • Epoxy Painted Pool should last 5-8 years before requiring painting. • When painting: • Power wash pool, remove any large spalling concrete areas or scrap flaking paint. • Recommended Paint - N69 Epoxoline II by Tnemec, or “Ultra Poly One Coat”, by Poly One Coat. • Recommended Patching Material: • Tnemec Series 218 Mortar-Clad, aggregate reinforced epoxy. • Sika Top 122 Plus (horizontal surfaces, Sika Top 123 Plus ( Vertical Surfaces). • Be certain to use an appropriate bonding agent with an mortar. • Cure time for Epoxy Paint – 10 days before submerged. • If flaking paint still exists, you may need to hydroblast to original concrete.

  14. Plastered Pools • Re-plaster Pools every 10-12 years. • Acid wash plaster pools every 5 years. Typically performed by a maintenance contractor. • Minimize the amount of time plaster pools are left exposed to dry conditions. This will shorten the life of plaster finish. • Patch repairs can be accomplished: • Power wash the area of replacement. • Apply plaster bonding agent. • Mix plaster and apply. • Submerge in water after plaster has set • Curing and application per manufacturers requirements. • Common Suppliers of plaster in North East – • SCP Distributors.

  15. Caulking / Gutter Systems • Review Caulking yearly. If cracked cut out and replace. • Use a Two Part Polysuflate Caulking: • WR Meadows “Deck-o-seal”, or BASF Product • Utilize the proper bonding agent with the caulking • Use a backer rod to fill the void for proper spacing. • Clean gutter seasonally, with a stainless steel cleaner: • “The Stuff” by Broco Products. • Check all welds on the gutter. If a separation • is noticed, contact a welder. • Flooded Gutter – indication the auto fill is not calibrated. • Only a ¼” to a ½” of flowing water should be retained • in the gutter system at anytime.

  16. Pool Shell Repairs • Clean and chip the spalling areas. • Use powerwasher, and clean any sandy debris. • Hammer Test area. • Use a fortified mortars and use bonding agents: • Sika Top 122 Plus (horizontal surfaces, Sika Top 123 Plus ( Vertical Surfaces). • Laticrete – 3701 Fortified Mortar

  17. Main Drains / Skimmers • Display your most up to date COC for the Main Drain covers • Ensure you are VGB Compliant: • Proper Cover, and covers are secured. • Suction Piping is 1.5 outlet pipe diameters from bottom of grating to top of suction piping. • Suction Piping to filter does not exceed 6 Feet / Second. • Drain grate, sump, and piping can held 100% of the recirculation flow. • Ensure you skimmer equalizer lines are equipped with a VGB cover. • Do not put chlorine tablets into skimmer baskets. • Ensure all skimmer covers are screwed down and properly secured. • If you have a vacuum line, ensure the vacuum release system is operable, if not abandon the system.

  18. Water Chemistry • Proper water treatment will increase the longevity of your pool finishes: • Beyond checking chlorine levels: • Check Calcium Levels • If you have lower calcium levels, the water will pull it from the plaster and concrete surfaces. • Check your Alkalinity • This will allow you to dial your pH, and help your saturation index. • Check your saturation index. • Corrosive water will prematurely tarnish and destroy your pool finishes. • Scaling Water will result in calcium build up in piping and in heater units. • Check your Cyanuric Acid (protect chlorine from UV destruction) levels. High levels will render your chlorine in active. • Replace you test agents yearly.

  19. Planning For the Future Myers Pool – Winooski VT

  20. Steps for Planning For A New Facility • Initial audit & feasibility study • Preliminary engineering • Fundraising / Municipal Bond • Final Design • Bidding • Construction

  21. Initial Audit and Feasibility • Goals of this Report • Understand current conditions from a Code And Liability standpoint. • Understand the age of the facility in current conditions. • Identify immediate and long-term capital improvements. • Provide a cost estimate on the capital upgrades, or phased upgrades. • Provide an approximate timeframe of service life. Understand What We Have!

  22. Preliminary Engineering • Concept to Schematic Level Drawings: • Public Outreach and Coordination with committees • Capture all Unknows: • Geotech & Hazardous Materials. • Prepare a definitive program • Price estimate from a Third-Party Source Do not bond the project unless you have an accurate number

  23. Final Design / Bidding / Construction • Completion of Engineered Drawings • Final Third-Party Estimates • Secure of All Permits • A min of (1) month Bid Period • Construction Period in VT • Minimum (1) Year • (1) season of swimming is lost Rosemary Pool - Needham

  24. Process Example: Myers Pool – Winooski VT • Initial Estimate: $4,400,00 • Conclusion of Preliminary Engineering: $3,900,00 • Conclusion of Construction Documents: $3,600,000 • Bid Results: $3,105,000 • Initial Audit – April 2016 • Pool Opening June 2020

  25. Case Study – White Pool Rutland VT • What we learned: • Initial audit conditions in 2014. • Attendance, Revenue, and Expense in 2014. 2015-2017 – Rehab process • Steps taken • Lessons Learned • 2018-2019 – Final results • Attendance, Revenue, and Expense 2019.

  26. 2014 Audit & Conditions • Facility was leaking water • Compliance issues • Outdated bath house. • Voids and structure failures on pool and deck • Contained (1) Pool with 8500 SF of water • 2014 Attendance & Costs: (3.5% increase to 2019 value) • Revenue: $21,846 ($25,947 – 2019 value) • Operation Costs: $90,278 ($107,222 – 2019 value) • City funds the Pool: $68,432 ($81,275 – 2019 value)

  27. 2018 – 2019 – Facility Use • Approximate Revenue $65,000. Passes, Preschool, and Rentals: • 350 Seasonal Passes Sold. (increase of 100 from 2018) • Out of 350 Passes, 40% of the passes sold only had to pay 25% of the yearly fee, (low income subsidized). Approximately $30,000 in subsidizes. • Pool Budget - $117,000 – Approximately going to use only 83% (97,110), City contribution is $32,110 per year. • Operational Costs: • $5,000 Electric • $9,000 Propane • $6,500 Chemicals (Final Bills not in yet, but use less than budgeted)

  28. Lessons Learned • Perform all Unknowns prior to Bond: • No Geotech & Hazardous Analysis was performed. • PCBs were found in the pool • Added Additional $150,000 to project Budget • Urban & Unsuitable sub-base encountered. Added additional $250,000 to project. • This resulted in: • Rebidding the project • Renovating existing bath house rather than new bath house • Reduction in proposed pool scope. • Reduced pool deck

  29. Cost of Repair & Upgrade 2019 Values (Base on Hired Contractors) • Sand Replacement: $8,000 to $15,000 (per filter) • Sand Filter Replacement: $50,000 to $70,000 (per filter) • Pump Replacement: $4,000 to $9,000 • VFDs: $2,500 to $6,000 • Strainer Replacement: $1,500 to $4,000 • Chemical Controller Replacement: $3,500 to $6,500 • Chemical Pump Replacement: $700 to $1,500 • UV Replacement: $14,000 to $50,000 • Plastering a pool: $23.00 / SF • New Concrete Deck: $15.00 / SF • Painting a Pool: $12 - $17 / SF (hydro blasting included) • Stainless Steel Gutter Replacement: $350 / LF • Main Drain Grates: $700 - $1500 per grate • Fencing: $60 / LF Complete Pool Replacement Approximate: $260 - $310 / SF Complete Building replacement: $250-$300 / SF

  30. THANK YOU! Mark Mariano PE CPO Project Manager Weston & Sampson Engineers 85 Devonshire Street; 3rd FL Boston, MA 02109 978-532-1900 – Ext. 7407

More Related