Memorandum. TO: Clark Champion, General Manager, Sun Lakes HOA #3. Thomas Spendiarian, RA Lance Willis, PhD. Practice Court abatement line items

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1 Memorandum TO: Clark Champion, General Manager, Sun Lakes HOA #3 FROM: SUBJECT: Thomas Spendiarian, RA Lance Willis, PhD Practice Court abatement line items DATE: April 12, 2013 Here is a more detailed review of the abatement options for the converted practice courts in the format that you requested. It should be noted, however, that the attenuation values are included for informational purposes. As discussed previously, an acceptable abatement strategy is achievable for this site, but it must be implemented in a specific way in order for the wall system to meet its acoustical performance specification. This means that while there is some latitude in construction materials, the amount of absorbing material and the placement of the walls and absorption must be done in the manner detailed in the March 12, 2013 report. The line items given below are not mix and matchable except in regard to the materials or wall type used. Decibel values are not additive. The changes in attenuation listed below are relative to the conditions existing on February 25, 2013 when testing was last done on the site. This included Acoustifence installed on the east and north fencing with no absorptive liner on any wall surfaces. Wall heights are with respect to playing surface. Wall lengths are approximate. The design of any new features at the Sun lakes community center, should incorporate aesthetics, landscaping, topography, budget, engineering, permitting and scheduling. Aesthetics are important, in that a large feature such as a noise control wall will be visually prominent, in its position at the entry of the community center. The color, shape, texture and form of the fence should be designed with the preferences of the residents in mind and subject to their review and approval. Any fence greater than 6 high will require permitting by the County Development Review Dept. and will require engineering, and a complete drawing package. Securing competitive bidding will also require drawings. For these reasons, it is recommended that Sun Lakes secure proposals from qualified Architects and/or Landscape Architects for such work. It is understood that Sun Lakes is currently interviewing Landscape Architects for work at the community. The design of this fence can possibly be added to their scope of work for the current RFP s. Or possibly, a new Request for Proposal can be released. 1 of 10

2 North Wall The existing chain link fence is not capable of supporting sound insulating or absorbing panels. A free standing wall is recommended. Minimum height: 9.0 ft Length: 81 ft Absorptive Liner: optional Wall Types Item per ft Length (ft) North South East West Verticrete $ $10, AcoustiShield (w/ liner) $ $17, ~ Soundfighter (w/ liner) $ $22, ~ Sound Barrier Wall (by Noise Barrier) $ $24, ~ South Wall The existing masonry wall is sufficient in height and construction. Existing height: 9.5 ft Length: 50 ft Absorptive Liner: required Note: The quilted fiberglass absorber is a temporary solution. It will have a short lifespan in an exterior application. For more information, see: 2 of 10

3 Liners Item Acousticblok All Weather Sound Panels per ft Length (ft) North South East West $ $14,000 4 ~ 5 2 ~ Quiet Perf Panels $ $ ~ 5 2 ~ Quilted Fiberglass Absorber * $40 50 $ ~ 5 2 ~ * This is a temporary option. Expect short lifespan, less than one year. East Wall The existing chain link fence is not capable of supporting sound insulating or absorbing panels. A free standing wall is recommended. If the wall is splayed at an angle as shown in Figure 4.1 of the report issued March 12, 2013, a shorter wall of approximately 45 feet can be used. Minimum height: 8.0 ft Length: 45 ft Absorptive Liner: required Wall Types Item Verticrete w/ Quiet Perf Panels per ft Length (ft) North South East West $ $12, ~ 5 AcoustiShield (w/ liner) $ $ ~ 5 Soundfighter (w/ liner) $ $11, ~ 5 Acousticblok All Weather Sound Panels Sound Barrier Wall (by Noise Barrier) $ $12, ~ 5 $ $12, ~ 5 3 of 10

4 West Wall The existing chain link fence is not capable of supporting sound insulating or absorbing panels. A free standing wall is recommended. An absorptive liner is optional. Minimum wall height is 9.0 ft above the level of the playing surface. Minimum height: 9.0 ft Length: 95 ft Absorptive Liner: optional Wall Types Item per ft Length (ft) North South East West Verticrete $ $11, AcoustiShield (w/ liner) $ $20, Soundfighter (w/ liner) $ $25, Sound Barrier Wall (by Noise Barrier) $ $29, Wall Type Descriptions These cost estimates do NOT include tax, nor General Contractor mark up, insurance, permit fees, design & engineering fees, drawing fees, etc. All Pricing is approximate and general, intended only for comparative analysis of differing noise control fencing systems and is subject to verification / modification by appropriate contractors. Actual costs for budgeting should be provided by licensed Contractors. 4 of 10

5 WALL TYPE: Perforated Metal Panel (attached system) Perforated metal covering bagged fiberglass liner, 2 total thickness [#1] QUIET PERF PANELS Noise Barriers, LLC MATERIAL COST PER FACE FOOT, ($ / SF) [FOB Chandler AZ] $18 / SF COST PER RUNNING (LINEAR) 8' H, ($ / LF) $144/ LF MATERIAL (including mounting hardware) $21 / LF LABOR $165 / LF CIP (Complete In Place) 8' H, ($ / LF) Full 100% absorption at 1k & 2 khz. Not a freestanding material, must be fastened to a freestanding solid fence system. Can be mounted to existing solid wall or to VERTICRETE wall system. Interior fiberglass is bagged, perforated metal is powder-coated. Weather-resistance is considered excellent, 20 year lifespan is expected. 5 of 10

6 WALL TYPE: Solid Precast Concrete (freestanding system) Decorative concrete, 4 to 6 thick, post and panel framing system. [#2] COMMERCIAL SOUND WALLS VERTI-CRETE $110 / LF CIP (Complete In Place) 8' H, ($ / LF) [ NO absorber] $275/ LF CIP (Complete In Place) 8' H, ($ / LF) [WITH absorber] No absorption at 1k & 2 khz. [requires addition of sound absorber at interior face] Court side surface is reflective, will require the addition of a sound absorbing material fastened to the court side surface. (see above). Added material should be figured as an added $110 / LF) Post and panel system consists of 'H' shaped 12' o.c, w/ panels set vertically between them. 6 of 10

7 WALL TYPE: Pre-manufactured Sound Barrier (freestanding system) Sound absorbing, 4 rockwool insul, PVC grate, post and panel framing system. [#3] SOUNDFIGHTER SOUNDFIGHTER MATERIAL COST PER FACE FOOT, ($ / SF) [FOB Chandler AZ] $ 25 / SF COST PER RUNNING (LINEAR) 8' H, ($ / LF) $200/ LF MATERIAL (including mounting hardware & posts) $ 40 / LF LABOR $ 240 / LF CIP (Complete In Place) 8' H, ($ / LF) 100% absorption at 1k & 2 khz. Interior rockwool insulation is exposed, frame is colored plastic. Weather-resistance is considered good, year lifespan is expected. Exposed face of rockwool may appear weathered over time but does not deteriorate and is still functional. Note; This product can be erected in a temporary framework. The manufacturer supplies a system for temporary or movable support. Post and panel system consists of 'H' shaped 6' o.c, w/ panels set vertically between them. 7 of 10

8 WALL TYPE: Pre-manufactured Sound Barrier (freestanding system) Sound absorbing, 2 FG insul, perf. metal screen & frame, all weather system, post and panel framing system. [#4] ALL WEATHER SOUND PANELS ACOUSTIBLOK $ 280/ LF CIP (Complete In Place) 8' H, ($ / LF) 100% absorption at 1k & 2 khz. Face is perforated metal, with stainless steel dust screen, Interior insulation is protected, frame is welded aluminum. Weather-resistance is considered excellent 20+year lifespan is expected. This product is designed for extreme duty, exterior use. It is also de-mountable and is self supporting. Can be hung or set up in a self supporting temporary configuration. Post and panel system consists of 'H' shaped 8' o.c, w/ panels set vertically between them. 8 of 10

9 WALL TYPE: Pre-manufactured Sound Barrier (freestanding system) Sound absorbing, 5 FG insul, perf. metal screen & frame, all weather system, post and panel framing system. [#5] SOUND BARRIER WALLS Noise Barriers, LLC, MATERIAL COST PER FACE FOOT, ($ / SF) [FOB Chandler AZ] $ 30 / SF COST PER RUNNING (LINEAR) 8' H, ($ / LF) $240/ LF MATERIAL (including mounting hardware) $ 30 / LF LABOR $ 270/ LF CIP (Complete In Place) 8' H, ($ / LF) 100% absorption at 1k & 2 khz. Face is perforated metal, Interior insulation is FG, (un-bagged), frame is conventionally fastened metal, galvenealed steel,. Weather-resistance is considered very good, 20+year lifespan is expected. This product is designed for exterior use. It is also de-mountable and is self supporting. Can be hung or set up in a self supporting temporary configuration. Post and panel system consists of 'H' shaped 16' o.c, w/ panels set vertically between them. 9 of 10

10 WALL TYPE: Pre-manufactured Sound Barrier (freestanding system) Sound absorbing, 2 FG insul, cast FG body, post and panel framing system. [#6] ACOUSTASHIELD SOUND BARRIER CARSONITE COMPOSITES MATERIAL COST PER FACE FOOT, ($ / SF) [FOB Chandler AZ] $ 20 / SF COST PER RUNNING (LINEAR) 8' H, ($ / LF) $160 / LF MATERIAL (including mounting hardware) $ 30 / LF LABOR $ 190 / LF CIP (Complete In Place) 8' H, ($ / LF) 100% absorption at 1k & 95% 2 khz. System consists of 6 x 2 panels, with Interior FG insulation. Panel is slotted on one side for sound absorption. Exposed panel is colored fiberglass. Panels slide into vertical fiberglass columns set in concrete, pylon style. Weather-resistance is considered very good, 20 year lifespan is expected. Post and panel system consists of 'H' shaped 8-17' o.c, (varies with wind loading), w/ panels set vertically between them. 10 of 10