AQUATIC AUDIT REPORT

for the

ANDERSON PARK POOL

in

WHEAT RIDGE, COLORADO

Review Date —March 2, 2023

TABLE OF CONTENTS

TABLE OF CONTENTS

A. EXECUTIVE SUMMARY

B. POOL INFORMATION*

C. POOL ITEMS

1. STRUCTURES AND FINISHES

2. PERIMETER OVERFLOW SYSTEM

3. MAIN DRAINS

4. INLETS

5. POOL ACCESS & ANCHORS

6. POOL MARKINGS

7. UNDERWATER LIGHTS

D. DECK ITEMS

1. POOL DECK

2. DIVING BOARDS and WATERSLIDES

3. LEISURE POOL FEATURES

E. POOL MECHANICAL ITEMS

1. PIPING AND VALVES

2. PUMPS

3. FILTRATION & BACKWASH

4. CHEMICAL TREATMENT

5. CHEMICAL CONTROLLERS

6. POOL HEATERS

F. OPINION OF PROBABLE COST

G. ATTACHMENT “A”

A. EXECUTIVE SUMMARY

The ABO Group authorized Counsilman-Hunsaker to provide a swimming pool audit at the Anderson Park Outdoor Pool Facility in Wheat Ridge, Colorado. The Lap Pool, Leisure Pool, and Slide Splashdown Pool were constructed in 2007/2008 as part of a renovation project by the City of Wheat Ridge. Previous to the renovation, the site consisted of a 164’ x 60’ pool constructed in 1979. The 2007/2008 renovation included constructing two new pools “within” the original existing pool. The current lap pool shallow end wall and gutter system were installed as part of the 2007/2008 renovation, but the remaining three lap pool walls and pool slab are original to the 1979 construction. The 2007/2008 renovation also added a leisure pool where the slab was constructed on top of the original 1979 pool slab and the leisure pool walls were newly constructed.

The repair and/or replace estimations throughout this report and summarized in the OPC (Opinion of Probable Costs) on Page 28 tends to lean towards consideration of total replacement of the pools and their related systems.

As noted within this report, with the exception of the shallow end wall, the Lap Pool structure is 43 years old, leaking, and living on borrowed time.

Counsilman-Hunsaker was commissioned for this audit to identify items that are substandard or not operating as required, and offer insight for potential repairs if needed. Providing a safe and sanitary environment for the users of the pools is the highest priority for Counsilman-Hunsaker, The ABO Group, and the City of Wheat Ridge.

A site visit to the aquatic facilities was performed by Cary Dennis and Daniel Borgatti from Counsilman-Hunsaker on March 2, 2023. The site visit aimed to evaluate the existing outdoor pools and pool mechanical systems and review the aquatic programming needs, wants, and vision for the future of the swimming pools.

Two significant pieces of federal regulation have been adopted into law and impact new and existing commercial pools. Approximately ten years ago, the Americans with Disabilities Act (ADA) requires two (2) means of access to the pool itself. The second piece of legislation enacted around the same time was the Virginia Graeme Baker (VGB) Pool and Spa Safety Act. This required specialty anti-entrapment covers at the main drains. VGB covers were in place and pool staff relayed they were replaced in 2023. Federal law requires replacement based upon manufactur-ers life span.

Codes Applicable and Referenced within this report:

• ANSI/APSP/ICC-1 2017

• Jefferson County Department of Health defers Pool Regulations to The Colorado Department of Health and Environment—Water Quality Control Division—SWIMMING POOLS AND MINERAL BATHS

• Model Aquatic Health Code (MAHC)

• National Pool & Spa Institute

Applicable Federal Code Sections:

• Virginia Graeme Baker Pool and Spa Safety Act (VGB)

• ASME/ANSI A112.19.81

• Signed into Law on December 19, 2007

• CPSC Staff Interpretation of Section 1404 issued on June 18, 2008

• Americans with Disabilities Act (ADA) U.S.C. 12101 et seq. Signed into Law on July 26, 1990

The administrative code requirements must be satisfied if a significant modification of the pool is undertaken or if a particular item or piece of equipment is in need of repair. The recommended repairs address all administrative code items identified in this report.

Structural Issues/Review:

If a pool structural inspection is being considered, Martin/Martin are recommended and have extended experience pool swimming pool structural design.

Martin/Martin Consulting Engineers – Investigative Department

12499 W Colfax Ave

Lakewood, CO 80215

Phone: 303-431-610

B. POOL INFORMATION

Lap Pool (per 10-03-07 Drawings)

Maximum Length: 82’-2”

Maximum Width: 60’-0”

Surface area: 4,507 ft²

Perimeter: 284’- 4” Linear Feet

Depth: 4’-3” to 12’-4”

Volume: 313,000 gallons (330,000 calculated)

Lanes: Eight (8) 84’-0” Lanes

Turnover Rate: 4.22 Hours

Design Flow Rate: 1,250 GPM

Filtration Method: High Rate Sand Filters

Filtration Area: 90.0 ft² Total (Two Filters at 45.0 ft² each)

Backwash Rate: 687 to 916 GPM (Per Filter Operation Sheet on the Gauge Cluster Panel)

Leisure (Splash) Pool (per 10-03-07 Drawings)

Surface area: 2,959 ft²

Perimeter: Unknown

Depth: 0’-0” (Zero Entry) to 3’-0”

Volume: 37,300 gallons

Turnover Rate: .99 hrs

Design Flow Rate: 625 GPM

Filtration Method: High Rate Sand Filters

Filtration Area: 45.0 ft²

Backwash Rate: 687 to 916 GPM (Per Filter Operation Sheet on the Gauge Cluster Panel)

Slide Splashdown Pool (No Accurate Drawings are Available)

(NOTE: This pool is tied to the Lap Pool. The overflow weir and the floor sump drain via gravity to wall sumps located in the lap pool deep end wall. The only treated water return is supplied by the slide pump)

Surface area: 250 ft² (Approximate)

Perimeter: 70’-0” Linear Feet

Depth: 3’-6”

Volume: 6,500 gallons (Approximate)

*All information approximated from field observations of the swimming pool and construction/ renovation documents provided to the Consultant.

C. POOL ITEMS

1. STRUCTURES AND FINISHES

2. PERIMETER OVERFLOW SYSTEMS

3. MAIN DRAINS

4. INLETS

5. POOL ACCESS AND ACHORS

6. POOL MARKINGS

7. UNDERWATER LIGHTS

1. STRUCTURES AND FINISHES

Observations and Comments

Based upon the renovation drawings dated 10-3-07, the current lap pool and leisure pool were built utiliz-ing a pre-existing lap pool slab and walls. The preexisting lap pool was constructed in 1979. The top of the pool walls in the new 25 Meter lap area are original and where cut for the installation of the new stainless steel surge weir gutter. The lap pool shallow end wall was added and is doweled into the original pool slab. The main drains in the deep end of the lap pool are also original. The existing leisure pool also utilizes the original pool slab with adapta-tions for new pool walls and main drains doweled into the original pool floor. Renovation drawings note A Skia Swell (Expansive Caulk) was required at all cold joints within the pool. The “Expansive

Caulk” note may have been a typo, as Sika Swell and caulk are entirely different products. A com-pression water stop is also noted on the new shal-low end lap pool wall and the leisure pool walls.

Compression water stops are notoriously unreliable.

The new lap pool shallow end wall is dimensioned at 1’-9” thick. However, the structural steel for this wall is alarmingly deficient. Typical ACI structural requirements for swimming pools requires a mat of structural steel for every 8 inches of concrete. This wall has a #4 hoop bar on 12 inch centers with lat-eral bars that appear to be spaced 18”+ apart. The plunge pool structure for the open flume water slide was not part of the 10-2-07 renovation.

Upon inspection, the lap pool and the leisure pool have numerous surface cracks and delaminated plaster. The lap pool surface could not be closely inspected due to water in the pool. However, plaster cracking and separation could be seen from the pool deck. A majority of the leisure pool surface was accessible for inspection. It is important to note that a surface inspection cannot accurately determine if the plaster issues are directly related to structural cracks without removing the plaster. It is also im-portant to note that Diamond Brite Plaster, or any type of aggregate based plaster requires submer-sion for curing, longevity, and durability.

Image 3: Lap Pool Expansion Joint

Image 2: Cracks In Leisure Pool Finish

Image 1: Lap Pool

The leisure pool trim tile is poorly installed in numer-ous locations. Uneven surfaces, cut tile with chipped and sharp edges (See Image 5) along with missing grout and pool plaster infilled into the grout joints (See Image 5).

The lap pool expansion joint, wall target, and lane line tile appear to be in adequate condition. Howev-er a close inspection could not be obtained due to water in the pool. The expansion joint tile (See Im-age 3) was closely inspected and the grout joints were filled with Diamond Brite plaster. The caulk joint appeared to be intact, but shows areas of wear. Expansion joint caulk should be replaced eve-ry two to three years by a qualified caulk installer.

Recommendations:

It is recommended to test both the lap pool and the leisure pool structures for water loss. Pool staff noted that both pools leak via piping breaks and the leakage in the leisure pool is excessive. Testing the pools will need occur in the off season. Pool piping will need to the plugged/capped at the pool locations to isolate the pool structures, Then, the pools will need to be filled and tested per the procedure outlined in Attachment

“A”. If the pool structures are not water tight, repair costs could be exuberant.

Short Term: Water Testing Pool Structures

Estimate: $15,000.

If the pool structures are leaking, the locations of the leaks will need to be pinpointed. This is included in the estimated cost listed above (Water Testing Estimate).

Once the locations of the leaks are found, the pool plaster will need to be removed to allow access to the pool concrete. Additionally, other areas where the plaster cracking should be removed to inspect the pool concrete to verify the concrete does not have structural issues. Verification and procedures of con-crete repair and/or replacement with need to be deter-mined by a structural engineer.

Short Term: Structural Inspection Estimate: $8,500

The Diamond Brite Plaster finish in both pools is in adequate condition with multiple cracks and mild de-lamination. The zero entry to leisure pool is in very poor condition with what appears to be paint over

Image 6: Leisure Pool Inlet Tile

Image 5: Leisure Pool Zero Entry Tile

Image 4: Leisure Pool Zero Entry

Recommendations Cont’d:

the Diamond Brite Finish. The immediate need is to re-place/resurface the leisure pool zero entry to avoid po-tential slip & falls. The areas of Diamond Brite that have delaminated from the pool concrete need to be replaced with a bond coat and new Diamond Brite. New Diamond

Brite Finishes should be budgeted for within the next 3 to

5 years, pending the life of the existing finishes.

Short Term: Re-Coat the Leisure Pool Zero Entry with Slip

Resistant Epoxy Paint OR Epoxy Filler with Slip Resistant

Aggregate Similar to RockHard.

Zero Entry Re-Coating Estimate: $58,000

Short Term: Tile specifically at the zero entry to the leisure pool needs to be replaced. Elevations need to equalized eliminating any uneven surfaces and cut or timed tile.

Zero Entry Trim Tile Replacement Estimate: $24,000

Short Term: Numerous tile locations appear to have miss-ing grout or the grout joints are filled with Diamond Brite

Plaster. It is recommended to remove the exiting grout and/ or plaster fill in the tile grout joints and replace with epoxy grout.

Tile Grout Replacement Estimate: $15,000

Short Term: For tile areas that were submerged or snow covered (Lane Lines), if broken tiles are present they should be replaced. Hopefully attic stock is available. If not, new tile will be required.

New Tile & Grout Replacement Estimate: $65.00/sq ft.

Long Term: Facility staff asked about the ability to add structural support shallow end wall. This would require re-moval and replacement or building a new wall interior to the existing wall.

Estimate: $160,000

Long Term: Replaster All Pools

Estimate: $475,000

Image 9: Leisure Pool Stair Entry Tile & Plaster

Image 8: Leisure Pool Zero Entry Tile

Image 7: Leisure Pool Zero Entry Plaster and Tile.

2. PERIMETER OVERFLOW SYSTEMS

Observations and Comments

As noted in the structural section of this report, three of the four 25-Meter lap pool walls were modified from the original 50-Meter+ pool built in 1979. The fourth wall (shallow end wall) is a new wall. Modifications are based upon drawings dated 10-03-07. The modified lap pool walls included removal of the top of the origi-nal pool walls and the addition of a stainless steel gut-ter system with an integral supply tube. The supply tube has small 1/2” holes evenly spaced around the perimeter of the gutter to distribute treated water back into the pool (See Image 11). The limitations with pressure tube stainless steel gutters is that treated water rarely reaches the deeper water, often causing varied chemical level readings and cloudy water in the deeper areas. Alga flumes can also be an issue if not.

Many states require wall inlets evenly spaced between the water level and pool floor or floor inlets. Or a com-bination of both. The current Model Aquatic Health

Code notes the following:

4.7.1.3.1.3.1—For Pools greater than 50 ft wide

(15.2m), floor INLETS shall be required.

4.7.1.3.2.1 — Floor INLETS shall be spaced to effectively distribute water throughout the pool.

While the current pool would likely be grandfathered to current pool codes.

Pool staff relayed that there are suspected issues with welded joints in the gutter system. If welding seams on stainless steel gutters are not properly passivated after welding, they will begin to corrode and potentially fail, if not properly treated.

Lap pool gutter grating is in poor condition and should be considered for replacement.

The leisure pool utilizes a skimmer overflow system that drains via gravity to a balance/surge tank located below the pool deck in front of the filter room. This is uncommon as skimmers are designed for direct suc-tion since they are sporadically placed versus a con-tinuous overflow gutter system. Health Codes do not dictate a flow requirement, other than a manufacturers recommended flow (per MAHC 4.7.1.5.3). Skimmer manufactures recommend 30 to 50 gpm per skimmer.

Image 12: Gutter Design Drawing 10-03-07

Image 11: Stainless Steel Gutter Inlet Port

Image 10: Stainless Steel Gutter

With six (6) skimmers and the zero entry trench tied into a single 8 inch line that drains to the surge tank, the maximum flow via gravity is 465 gpm. Industry standards are the overflow should handle a mini-mum of 80% to 100% of total recirculation flow, Cur-rent Colorado State Code requires a minimum of

50% of the recirculation flow. With the 8 inch line the overflow is at 74%.of the recirculation flow.

Four (4) of the six (6) skimmers have cracks and all skimmers appear to be poorly installed. There are no details on the 10-03-07 drawings indicating how the skimmers were to be installed. Typically, skim-mers are encased in concrete with structural steel

(rebar) surrounding the skimmer body. Pool staff relayed that there is/are a major leak(s) in the skim-mer system

The slide splashdown pool has a grate at the top tread of the stair entry that runs the entire width of the pool (See Image 15). Pool staff relayed that the piping from this grate drains into the lap pool. Draw-ings provided do not indicate pipe routing or con-nections from this overflow grate.

Recommendations:

Short Term:

Replace the lap pool gutter grating.

Estimate: $55,000

Touch-up weld and re-passivate stainless steel gut-ter seams.

Estimate: $48,000

Replace all six (6) skimmers at the leisure pool and modify the pipe sizes to the surge tank to accommo-date 80% to 100% of the flow rate.

Estimate: $125,000

Image 15: Slide Splashdown Pool Overflow Grate.

Image 14: Leisure Pool Skimmer Throat

Image 13: Leisure Pool Skimmer Body

3. MAIN DRAINS

Observations and Comments

The main drains in the deep end of the lap pool are origi-nal to the 1979 construction of the 50-Meter Lap pool.

According to the renovation drawings dated 10-03-07, the deep end main drains were not modified and it is as-sumed the original main drain piping beneath the pool was utilized with a new connection point between the pool and the filter room.

The leisure pool main drains were installed with the 10-

03-07 renovation and new piping was utilized for these drains (See Image 17).

The slide plunge pool main drain was covered in snow and a visual inspection was not possible. Renovation drawings dated 10-03-07 indicate a main drain modifica-tion that was not installed as part of the renovation. Addi-tionally, wall sumps in the lap pool were also noted for modification as part of the renovation, although they were not installed. The 14 inch interconnecting drain line between the slide plunge pool and the current lap pool wall sumps is original.

The main drains in the lap pool and the leisure pool were submerged and visual inspection could not be accom-plished. Based upon the dimensional data in Image 18, the leisure pool sumps are compliant with current VGB regulations. However, based on the information in image

17 taken from the original pool drawings, the lap pool sumps are not dimensionally compliant. The elevation of the top of the suction pipe must be 1.5X the pipe diame-ter from top of the grate. Therefore, for an 8” pipe, the top of the pipe must be a minimum of 12” below the top of the grate.

Pool staff relayed that VGB compliant covers have been installed and were up to date.

Recommendations:

Short Term: Replace or modify the Lap Pool main drains and piping to achieve VGB Compliance.

Estimate: $75,000

NOTE: Other modifications are available, but dimension-al verification is required.

Long Term: Replace main drain covers every 10 years based upon current VGB requirements.

Estimate: $25,000 for all drain covers

Image 18: Original Lap Pool Main Drain Detail

Image 17: Leisure Pool Main Drain Detail -01-03-07 Drawings

Image 16: Lap Pool Main Drain Detail—10-03-07 Drawings

4. INLETS

Observations and Comments

As noted in the overflow section of this report, the lap pool uti-lizes a stainless steel gutter with a pressure tube return sys-tem. The pressure tube located on the face of the gutter sys-tem distributes treated water back into the pool approximately

10 inches below water level. The supply tube has small 1/2” holes evenly spaced around the perimeter of the gutter to dis-tribute treated water back into the pool (See Image 20). The limitations with pressure tube stainless steel gutters is that treated water rarely reaches the deeper water, often causing varied chemical level readings and cloudy water in the deeper areas. Algae flumes can also be an issue if not. Many states require wall inlets evenly spaced between the water level and pool floor or floor inlets. Or a combination of both. The current

Model Aquatic Health Code notes the following:

4.7.1.3.1.3.1—For Pools greater than 50 ft wide

(15.2m), floor INLETS shall be required.

4.7.1.3.2.1 — Floor INLETS shall be spaced to effec-tively distribute water throughout the pool.

It is likely that the current pool would likely be grandfa-thered to current pool codes.

The leisure pool utilizes twenty one (21) floor inlets (based on

10-03-07 drawings) that equally distribute treated water back to the pool. At the time of my review the pools were not opera-tional and many of the inlets were covered with winter water.

Pool staff relayed that it is suspected that the supply piping to the leisure pool inlets may be leaking.

Recommendations:

Short Term: Supply piping to the floor inlets in the leisure pool should be tested for leaks. Leak repairs can be costly and its impossible to pinpoint a specific cost.

Estimate Range: $15,000 to $50,000

NOTE: Once leaks are repaired, it is suggested to retest the piping to verify all leaks have been addressed prior to backfill.

NOTE: Adding wall inlets to eliminate dead spots in he lap pool to equalize treated water distribution would not be feasi-ble. The cost would be in the six figures.

Long Term — Seasonal: Winterizing the leisure pool floor inlet piping should always include removal of as much water as possible, the addition of RV antifreeze into the piping sys-tems, and threaded PVC caps screwed into the inlet body.

Estimate: $5,000

Image 21: Leisure Pool Inlet

Image 20: Lap Pool Inlet Gutter Pressure Tube Inlet Nozzle

Image 19: Lap Pool Pressure Tube Detail—10-03-07 Drawings

5. POOL ACCESS AND ACHORS

Observations and Comments

The lap pool has four (4) means of standard access via ladders located 7 feet from each longitudinal corner of the pool. Pool staff relayed that one (1) pool lift is utilized for ADA accessibility. At the time of our review, the lap pool ladders and ADA lift had been removed for off-season winter storage and placement of the pool cover.

The leisure pool has one (1) standard means of ac-cess via a large stairway on the east end of the pool.

The Model Aquatic Health Code notes:

(4.5.5.4) Wider Than Five Feet Stairs wider than 5 feet (1.5 m) shall have handrails at either side and spaced not more than every 12 feet (3.7 m) apart across the entire stair width.

This interpretation indicates that rails are required on both outer edges of the stairs, then spaced a maximum of 12 feet between the two outer rails. If the health dept has not flagged this as an issue, it is assumed the leisure pool is complaint or grandfa-thered according to Jefferson County Codes.

The leisure pool does not have a primary means of

ADA accessibility. A primary means of access is an

ADA lift or a ramp entry with a landing and rails.

Adding an ADA lift would make the leisure pool compliant.

Recommendations:

Short Term: Install a battery powered ADA compliant pool lift to the leisure pool. An extra battery is also recommended. If the lift is to be stored during the off season, a cart for transport is also required.

Estimate—Pool Lift w/ Extra Battery $13,500

Estimate—Pool Lift Cart $2,500

Long Term: Additional rails (on north and south sides) should be considered for the leisure pool stairs. Additional wedge anchors would also be required along with grounding of the anchors.

Estimate: $8,500

Image 24: Leisure Pool Inlet

Image 23: Leisure Pool Stairs and Rails

Image 22: Lap Pool Grab Rail Location(s)—10-03-07 Drawings

6. POOL MARKINGS

Observations and Comments

The lap pool has deck mounted tile depth markers and

NO DIVING markers. The tile consists of 1” x 1” tile pat-terns that provide 6-inch tall numbers and letters. There are numerous locations where the tile is missing, broken, or delaminated from their base. There are also locations where the markers exceed the allowable distance of 25-feet between markers. Code also requires vertical depth markers. With the stainless-steel gutter there should be vinyl depth makers on the face of the gutter (above water level). These only last a short period of time and typically the need to replaced at the beginning of each season.

The slide splashdown pool has only two (2) tile depth markers that are located on the pool deck. These two locations are duplicated on the vertical face of the pool.

Additional depth markers are required to meet the re-quired minimal distance requirements of 25 feet apart or less. Additionally, NO DIVING markers are required for depths of five feet or less.

The leisure pool has both deck mounted and vertical pool wall mounted tile depth markers. The deck mounted depth markers show wear and tear and are missing grout between the tile joints. There are no depth markers or warning signs on the entire zero entry portion of the pool. Both Jefferson County Health Code and the Model

Aquatic Heath Code do specifically define if depth mark-ers are required at zero entries. The MAHC notes that they are not required for wading pools that have a depth of 6 inches or less. But this is not a wadding pool. If this has not been flagged by code review officials, it may not be required per code. However, industry standards typi-cally include depth marker and NO DIVING at zero en-tries. Potential legal arguments could also justify their inclusion.

Recommendations:

Short Term: Replace lap pool deck mounted depth markers with 8” x 8” non slip depth markers and warning signs.

Estimate—$8,800

Short Term: Add vertical vinyl depth markers to lap pool

Estimate—$2,000

Short Term: Add zero entry depth markers and warning signs and new 8” x 8” non slip depth markers to leisure pool

Estimate—$6,500

Short Term: additional depth markers and warning signs to slide splashdown pool. Estimate: $3,500

Image 27: Leisure Pool Inlet

Image 26: Leisure Pool Stairs and Rails

Image 25: Lap Pool Grab Rail Location(s)—10-03-07 Drawings

7. UNDERWATER LIGHTS

Observations and Comments

The underwater lights are shown in the original pool drawings built in 1979. Renovations drawings from

10-03-07 note the removal of these lights . (See Im-age 29). Oddly, the detail calls for the lamp to be removed and the niches to remain in place and to be packed with non-shrink grout. Typically, the niche is removed and the void is filled with water proofing material, concrete, and or grout.

NOTE: Facility staff report that underwater lights have not been in place since 1999. Therefore, it is unknown if the lights were originally installed. If the pool is replastered with the existing plaster re-moved, a inspection of the pool walls is warranted regarding the existence and condition of the patched underwater light locations.

It is key to keep a close eye on the original under-water light locations. The disconnected conduit is noted to be filled with caulk, which, over time, will fail. These abandoned light locations can be a po-tential leak point.

Image 29: Leisure Pool Stairs and Rails

Image 28: Lap Pool Grab Rail Location(s)—10-03-07 Drawings

D. DECK ITEMS

1. POOL DECKS

2. DIVING BOARD AND WATER SLIDES

3. LEISURE POOL FEATURES

1. POOL DECKS and COPING

Observations and Comments

Pool decks appear to be in adequate condition. There are locations of shrinkage cracking (See Image 30) and minor shifting, but no noticeable structural cracking, heaving or settlement. Pool staff reported no slip/falls due to slick surfaces related to the pool deck.

Cold joints in the pool deck appeared to have no caulk or fill material which is typical for cold joints. It appears the cold joints were originally poured without expansion joints. This is necessary to keep water from penetrating the joint and damaging the concrete due to freeze-thaw.

Caulk is also missing from the joint between the back of the lap pool stainless steel gutter where the deck con-crete meets the gutter.

The cold joint between the pool deck and the leisure pool coping should also include a could joint. However it ap-pears it was constructed without expansion material and a caulk sealant. The leisure pool coping is in poor condi-tion with multiple cracks which can be defined as struc-tural cracking. Based upon the renovation drawings date

10-03-07, no rebar is present in the cast-in-place coping, making it susceptible to cracking and displacement.

Deck anchors for starting platforms are not flush/level with the deck concrete, creating a tripping hazard. It is important to note that verification of starting platform an-chor availability should be obtained prior to removal.

Recommendations:

Short Term: The concrete pedestal for the 1-Meter dive stand that was previously removed should be demol-ished and replaced with new decking that is level with the remainder of the pool deck. This item is a tripping hazard and an obstruction.

Estimate—$5,000

Short Term: Replace starting platform deck anchors flush with the deck surface.

Estimate—$14,000

Short Term: The leisure pool coping should be re-placed. Since the replacement of pool skimmers is also recommended, the poor condition of the existing coping which is integral to the skimmers requires the new cop-ing properly anchored to the pool beam with integral re-bar.

Estimate—$80,000

Long Term: N/A Image 32: Leisure Pool Slide Stair and Rail.

Image 31: Leisure Pool Stairs and Rails

Image 30: Lap Pool Deep End Deck

2. DIVING BOARD and WATER SLIDE

Observations and Comments

As part of the 2007 renovation, a 1-Meter dive stand with a concrete platform was added to the south side of the deep end of the lap pool. The dive stand has recently been removed, however the concrete platform remains.

This is an obstruction for deck traffic. This item is also noted in the Pool Deck and Coping portion of this report.

The large water slide was installed as part of the 2007 renovation, although the layout of the slide is dramatical-ly different than the slide shown on the 10-03-07 renova-tions drawings. Pool staff relayed the concern regarding the out of plumb steel support columns. The interior fin-ish of the slide is in good condition with the exception of the slide seams that need to be re-caulked. The exterior of the slide fiberglass is showing its age and is due for a new resurfacing or epoxy coating. The steel columns, yokes, and hardware appear to have minimal corrosion.

Bi-yearly inspections by maintenance staff are always recommended (prior to the start of the swim season and the end of the swim season). The slide riding surface should be waxed at the beginning and end of each swim season and the fiberglass seams should be re-caulked at the beginning of each season.

The small slide at the leisure Pool is in poor condition.

Uneven seams, a worn riding surface, disintegrating stair railing leading to the slide platform, delaminating safety padding, and a dangerous raised concrete shelf utilized for the slide support.

Recommendations:

Short Term: The concrete pedestal for the 1-Meter dive stand that was previously removed should be demol-ished and replaced with new decking that is level with the remainder of the pool deck. This item is a tripping hazard and an obstruction.

Estimate— See Pool Decks and Coping

Short Term: Schedule yearly riding surface waxing and seam caulking.

Estimate—$8,000

Short Term: Remove the small leisure pool slide, slide concrete stair and platform, padding, and railing.

Estimate—$30,000

Long Term: Epoxy coat the exterior surface of the fiber-glass

Estimate—$23,500 Image 35: Water Slide Interior Seam

Image 34: Water Slide Support Columns

Image 33: Concrete Platform from Removed Dive Stand

3. LEISURE POOL FEATURES

Observations and Comments

At the time of our review, all of the raised features had been removed and stored for winter. The deck level fea-tures had been winterized. Pool staff relayed that many of the current features have recently been repaired or replaced. The piano feature (See Image 37) has not functioned for many years. The Water Odyssey Control-ler installed during the 2007/2008 renovation is also non-functional.

Pool staff also relayed that there are concerns that the feature piping routed from the filter room to each pool feature may be leaking. It was stated that it it uncertain which feature or pipe(s) is/are suspect. But it is feared that the feature piping may be contributing to the rapid water loss. The pressure testing of “all” pool piping is recommended in the “Piping and Valves” section of this report.

Please refer the Image 38. A new feature has been pur-chased by the city and will be installed prior to the 2023 swim season.

Short Term: Replace the piano feature in the zero entry with a feature (or features) that will equal flow require-ments. This replacement should coincide with the zero entry surface replacement.

Estimate— $25,000

Short Term: Pressure test all leisure pool feature piping.

Estimate— Refer to the “Piping and Valves” section of this report.

Long Term: Epoxy Paint all above grade (functional) features every 3 to 4 years.

Estimate— $20,000

Long Term: Above grade pool features tend to have a five (5) to seven (7) year life span. It is recommended to budget for replacement

Estimate—$30,000 to $50,000

Image 38: New Leisure Pool Features.

Image 37: Leisure Pool Piano Feature

Image 36: Leisure Pool Deck Mounted Feature Location.

E. POOL MECHANICAL ITEMS

1. PIPING AND VAVLES

2. PUMPS

3. FILTRATION AND BACKWASH

4. CHEMCIAL TREATMENT

5. CHEMICAL CONTROLLERS

6. POOL HEATERS

1. PIPING and VALVES

Observations and Comments

Based on renovation drawings dated 10-03-07, all below grade, balance tank, and filter room piping for the leisure pool is Sch 80 piping. For the lap pool, all below grade (with exception of the pre-existing main drain piping) balance tank, and filter room piping is

Sch 80. Since no construction drawings are available for the slide splashdown pool, it is assumed the interconnecting piping with the lap pool is Sch 40.

Pool staff relayed that the leisure pool loses a significant amount of water on a daily basis. Pool staff also reported that the lap pool also loses water. Since the pools do not have underwater lights, it is safe to assume that the water losses can be largely contributed to issues related to pool piping. However, as noted in the structur-al portion of this report, it is recommended that the pool structure is water tested for potential leakage via a water tightness test.

At the time of our review the pool recirculation systems were not operational due to off season winterization. The piping systems within the filter and pump room are uniquely designed with numer-ous operational challenges. Standard industry practice is to al-ways have recirculation pumps in the same room as the filtration systems for operational safety and simplicity. Additionally, access to the pump pit requires stepping on or over recirculation piping, which is a safety hazard. There are valves within the filter and pump rooms that are over 7 feet above finished floor. Valves over

7 feet above the floor should have chain operators to avoid opera-tors using a ladder to adjust.

Pool staff relayed that the balance tanks for each pool do not have modulating float valves. Without float valves, the balance tanks serve no purpose. Additionally, the orientation of the piping within these tanks can be contributing factor to excess air entering the piping systems. At the time of our inspection access to these pits was not available.

Pool staff also relayed that many butterfly and gear valves do not seat properly. Flange adjustment or valve replacement should be considered.

Recommendations:

Short Term: Pressure test all below grade recirculation piping, including interconnecting piping between the splashdown pool and the lap pool.

Estimate—$10,500

Short Term: Add Modulating float valves to the balance tank for each pool.

Estimate—$12,500

Short Term: Replace gear or butterfly valves where needed.

Estimate—$2,500 ea.

Long Term: Provide safe access to the pump pit via a safety lad-der with rails or a short catwalk.

Estimate—$5,500

Add chain operators to each valve 7 feet or more above the fin-ished floor. Estimate—$6,800 Image 41: Leisure Pool Feature Header Piping.

Image 40: Leisure Pool Supply Piping with Heater and Chemical

Connections.

Image 39: Filter Room Piping and Pumps.

2. PUMPS

Observations and Comments

The lap pool recirculation pumps (two) are vertically mounted end suction 15 HP 60 TDH pumps recircu-lating 625 gpm each.

The leisure pool recirculation pump is a self-priming

EQ Series 15 HP 60 TDH Pump with an integral strainer.

There are two feature pumps for the leisure pool.

Both pumps are self-priming EQ Series pumps with integral strainers. The first feature pump is a 10 HP

45 TDH pump with a 530 GPM flow rate. The sec-ond is a 15 HP 60 TDH pump with a 625 GPM flow rate.

No pumps are anchored to their housekeeping pads as required by manufacturers recommendations.

(See Image 42)

Strainers for the lap pool recirculation pumps are not properly supported. (See Image 43)

The compound and pressure gauges for all pumps are either missing or non-functioning. (See Image

44)

Facility staff noted that an E-Stop is needed for the leisure pool features. This is a code requirement in many states and is recommended for this facility.

Recommendations:

Short Term: Anchor all pool pumps to housekeep-ing pads.

Estimate—$2,500

Short Term: Add concrete support pad for Lap Pool strainers.

Estimate—$2,500

Short Term: Replace all compound and pressure gauges, petcocks, and shutoff valve on all pumps.

Estimate—$3,800

Long Term: Add an E-Stop for the Leisure Pool

Feature Pumps

Estimate—$3,200

Image 44: Non-Functional Compound Gauge

Image 43: No Support Under Lap Pool Strainers

Image 42: Pool Pumps Not Anchored to Housekeeping Pad

3. FILTRATION and BACKWASH

Observations and Comments

The lap pool has two (2) 60” x 84” horizontal high rate sand filters that filter the approximate 330,000 gallons of water every 4.4 hrs with a flow rate of 1,250 GPM and a filter rate of 13.65 GPM/SF.

Code requirement and industry standard for filter rate is 15.0

GPM/SF.

The leisure pool has one (1) 60” x 84” horizontal high rate sand filters that filter the approximate 37,000 gallons of water every 1.0 hrs with a flow rate of 626 GPM and a filter rate of 13.88 GPM/SF.

Both filter systems meet health code requirements and industry standards. However, there are issues that need to be addressed.

Filter backwash: The backwash systems for both pools tie into a single 10 inch pipe that discharges into a drain pipe wrapped in plastic to prevent splash-out in a separate room, making it impos-sible to monitor. Secondly, there is no backwash flowmeter, mak-ing the monitoring of the required flow rate range impossible. The backwash flow rate range posted as 687 to 916 gpm on each filter placard must be followed. Additionally, once the flow rate is set, the backwash flow adjustment valve handle (wheel) should be removed. Disturbing the filter bed with back pressure is a necessi-ty when backwashing a filter. Without these items, it is unlikely that proper backwashing is taking place. Filter manway hatches with windows allows a visual of the filter bed during backwash.

Backwash throttling valve gear operators are installed incorrectly.

The gear operators need to be removed and reinstalled correctly to show the indicator as closed, when the valve is closed, and open when the valve is open.

Facility staff relayed that the backwash process overflows in the discharge pipe system to goes to waste. This is a major issue that requires plumbing and civil engineering review. Once potential solution without major infrastructure modification would be to in-stall a retention tank to handle excess water flow.

The current lap pool and leisure pool filters utilize a hose bib fit-ting as a pressure relief system on each filter (See Image 47).

This is dangerous and could potentially damage the filter or some-one standing near the filter. Each filter should have a pressure relief valve mounted at the top of the filter with a manual bypass.

The pressure relief valve automatically releases trapped air within the filter. The piping from the air relief system and manual bypass should routed to the nearest floor drain, which unfortunately is in the adjacent pool pump room.

Pool staff relayed that the filter sand had recently been changed.

Typically, filter sand should be replaced every 12 to 15 years on seasonal pools. When replacing filter sand, it is also wise to re-place the filter laterals, as they are often damaged during the sand replacement process.

The Influent and Effluent gauges for both filter system gauge pan-els are broken and do not provide accurate pressure readings.

The tubing connections locations for each gage needs to be relo-cated.

Image 47: Hose Bib Used for Air Relief.

Image 46: Gauge Cluster for the Lap Pool

Image 45: Lap and Leisure Pool Filters

FILTRATION and BACKWASH—Cont’d

Short Term: Add backwash flowmeter to backwash piping and adjust valving to reflect required back-wash flow rates.

Estimate—$2,500

Short Term: Modify backwash valve gear operators and re-install for correct flow indication

Estimate—$1,000

Short Term: Add manway ports with observation glass to each filter to allow visual acknowledgement of filter backwash sand displacement. New port gas-kets should also be installed.

Estimate—$8,500

Short Term: Add automatic air relief systems with manual bypass and all associated sch 80 piping to floor drain or backwash funnel for lap pool and lei-sure pool filter systems.

Estimate—$10,500

Short Term: Replace influent and effluent gauges and associated tubing on lap pool and leisure pool filtration systems

Estimate—$6,000

Long Term: Install below grade retention tank to handle excess backwash water volume to compen-sate for restricted waste flow due to undersized drainage piping

Estimate—$130,000

Long Term: Replace filter sand every 12 to 15 years.

Estimate—$15,800

Image 50: Leisure Pool Filter Supply and Return Piping

Image 49: Lap Pool Return Piping and Chemical Connections

Image 48: Backwash Piping and Lap Pool Filter Supply Piping

4. CHEMICAL TREATMENT

Observations and Comments

The lap pool and leisure pool both utilize individual calci-um hypochlorite feed systems to provide the chlorine treatment for each pool. The feed systems are manufac-tured by Pulsar and utilize dry chlorine pellets. The Pul-sar systems utilize a closed system design for briquette storage tank and spray chamber with a wash down sys-tem that is initiated by a signal sent from the chemical controller for each pool. Calcium hypochlorite is a class 3 oxidizer that requires limitations in storage and fire rat-ings. A maximum of 200 lbs. of calcium hypochlorite can be stored in a single room, which includes the inside of each feeder system. Facility staff relayed that the Pulsar units require excessive maintenance and would prefer to switch to Accu-Tab Systems by Westlake Systems.

The pH control is maintained via a C02 feed system uti-lizing National Line NCS-CF-CO2 Feeders for each pool. These systems have a maximum flow rate of 30

SCFH. (See Image 53). Faciluty staff relayed that due to the cost and challenges obtaining Co2, they would like to switch to sodium bisulfate via Acid Rite feed systems.

Short Term: Install new Accu-Tab calcium hypo-chlorite systems.

$15,800

Short Term: Install new Acid Rite sodium bisulfate feed systems to control pH

$18,800

Long Term: N/A

Image 53: Co2 Tanks used for pH Control for both pools

Image 52: Lap Pool Chlorinator

Image 51: Leisure Pool Chlorinator

5. CHEMICAL CONTROLLERS

Observations and Comments

The lap pool and the leisure pool both utilize a ded-icated BecSYS 5 Chemical controller for each pool.

At the time of our review, one controller was missing due to repairs.

Pool staff relayed that the current position of the controller makes reading the controller monitor diffi-cult. Ideally, the monitor should be mounted at the eyelevel of pool staff. Typically, we see installations where the monitor is 5’-6” to 6’-0” AFF.

Both controllers are lacking a flow switch (See Im-age 56). A flow switch is necessary to monitor sys-tem flow. When the pool recirculation pump is shut down or loses power, the lack of flow through the flow cell sends a signal to the controller to discontin-ue chemical feed.

Short Term: Add a particulate strainer or a Y-

Strainer on the intake side of the flow cell for each controller

Estimate—$2,500

Short Term: Add a flow cell to each chemical con-troller.

Estimate—$3,500

Short Term: Always keep extra sensor probes in the event a probe failure occurs at an inopportune time.

Estimate—$1,200

Long Term: N/A

Image 56: Flow Cell Recommendation

Image 55: Probe Chamber for Leisure Pool—No Flow Cell

Image 54: Chemical Controller for Leisure Pool.

6. POOL HEATERS

Observations and Comments

The primary heating system for both pools is a gas-fired central boiler feeding heat exchangers for both pools.

Each pool has a dedicated heat exchanger. An older

Raypak Pool heater is also provided for supplemental heat for the pool water.

Facility staff relayed that the heat exchanger is of ques-tionable size. Based on the pool volumes and the tem-perature demands during early and late season weeks, the current primary and supplemental heating systems should provide adequate heat output. Of course, below average temperature dips during these times periods can have a significant impact on capabilities of these systems. Facility staff also relayed when the heater is operating on warm days, the operational heat from the boiler and heat exchangers will trip the electrical thermal protection for the pool pumps, which typically has a 120 deg threshold.

Many of the pool heating system valves are located as such that they are difficult to adjust without a ladder.

Typically, when valves are located over 7-feet above a finished floor, a chain operator installed to assure the valve can be safely adjusted without the use of a ladder.

The thermostat adjustment for the pool heater requires a ladder for accessibility. For safety purposes, the thermo-stat should be relocated to an accessible level (5 to 6 ft above finished floor.

Recommendations:

Short Term: Add chain operators to all valves located over

7-feet above finished floor OR re-rout piping so valve ad-justments can be made without the use of a ladder.

Estimate—$6,000

Short Term: : Relocate pool heater thermostat to an eye-level access location.

Estimate—$2,000

Long Term: If the current boiler is original to the 2007/2008 renovation, it is nearing the end of its life span. Budgeting for future replacement should be accounted for, Estimate—$175,000

Long Term: Provide proper ventilation and temperature control to the pump/heater/controller room.

Estimate—$150,000

Image 59: Leisure Pool Heater Piping

Image 58: Gas Boiler for Lap and Leisure Pool Heat.

Image 57: Tube & Shell Heat Exchanger Connections

F. OPINION OF PROBABLE COST

The following opinion of construction cost addresses the items identified in this report needing repair, replacement, or renova-tion in association with the upcoming renovation.

Notes:

The engineer has no control over the cost of labor, materials, equipment, or the contractor's methods of determining prices or over competi-tive bidding or market conditions. Opinions of probable costs provided herein are based on the information known to the engineer at this time and represent only the engineer's judgment as a design professional familiar with the construction industry. The engineer cannot and does not guarantee that proposals, bids, or actual construction costs will not vary from its opinions of probable costs.

G. ATTACHMENT “A”

WATER TIGHTNESS TEST PROCEDURE

A. This test applies to the Lap Pool, Leisure Pool, Splashdown Pool, and both Surge Tanks. The water tightness test shall be completed prior to the application of any new pool finishes. All pool piping should be capped or plugged during this test.

B. Water Tightness Test Procedure

1. Fill: Fill and then isolate each pool. The water tightness test shall begin after the vessel has been filled for a mini-mum of three (3) days. During the filling, all outlets shall be monitored for water tightness and all concrete joints shall be monitored for any visible leakage. If any visible leakage from the vessel is observed, the condition shall be corrected prior to the start of the test.

2. Evaporation/Precipitation Measurement Procedure

a. Fill a floating, restrained, partially filled, calibrated, open container with water and allow the container to float within the pool during the testing period. This will be used to measure evaporation and precipitation.

3. Measurement

a. On a separate sheet of paper draw a sketch of the pool. Measurements shall be taken at the pool. Multiple test points with averaging are recommended for vessels which will be exposed to wind. Document the sepa-rate findings on the chart below. Repeat the measurements and document every 12 hours for a total of three

(3) days. The General Contractor shall check the pool for water loss with the Architect/Engineer or Owner’s representative every 12 hours. Provide photo documentation of each measurement with the completed water tightness report.

4. Total Loss = 7.481 x Structure Surface Area (SF) x Total Water Loss per Day (FT) – Evaporation per Day (FT) + Precipitation per Day (FT)

Day #1 =

Day #2 =

Day #3 =

Total Allowable Water Loss:

Total Gallons:

(0.1%) x 0.001

Allowable Loss Pan Depth Per 24 Hrs.

Pool Measurements

Lap Pool Leisure Pool Splashdown Pool

Surge Tanks Pan Measurements

12 Hrs.

24 Hrs.

36 Hrs.

48 Hrs.

60 Hrs.

72 Hrs.

G. ATTACHMENT “A” - Cont’d

5. Repair

a. The allowable leakage rate for an unlined pool structure shall not exceed 0.1 percent of the total water volume in a 24-hour period. (Example: 0.001 x 200,000 gallon pool = 200 gallons per 24 hour period.) This excludes the loss/addition of evaporation/precipitation.

6. Absorption

a. Waiting 3 days after the initial water fill will allow the concrete to absorb water and shall be sufficient to minimize the effect of absorption on the test results.

7. If leaks are detected, contact a qualified pool contractor to provide an approach, procedures and cost for pool repairs.