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Southern Human Services Center Smith Sinnett /2020072 <br />HVAC and Roof Renovations Orange County,North Carolina <br />HVAC Air-Distribution System Cleaning 23 <br />01 30.51 - 3 <br />B.The cleanliness inspection shall be conducted without negatively impacting the indoor environment <br />through excessive disruption of settled dust,microbial amplification or other debris.In cases where <br />contamination is suspected,and/or in sensitive environments where even small amounts of <br />contaminant may be of concern,environmental engineering control measures should be <br />implemented. <br />1.Damaged system components found during the inspection shall be documented and brought <br />to the attention of the owner. <br />C.Site Evaluation and Preparations: Contractor shall conduct a site evaluation,and establish a <br />specific,coordinated plan which details how each area of the building will be protected during the <br />various phases of the project. <br />D.Inspector Qualifications:Qualified personnel should perform the HVAC cleanliness inspection to <br />determine the need for cleaning.At minimum,such personnel should have an understanding of <br />HVAC system design,and experience in utilizing accepted indoor environmental sampling <br />practices,current industry HVAC cleaning procedures,and applicable industry standards. <br />E.When cleaning work might adversely affect life safety systems,including fire and smoke detection, <br />alarm,and control,coordinate scheduling and testing and inspection procedures with authorities <br />having jurisdiction. <br />F.Ensure that electrical components that might be adversely affected by cleaning are de-energized, <br />locked out,and protected prior to beginning work. <br />G.Air-Volume Control Devices: Mark the original position of dampers and other air-directional <br />mechanical devices inside the HVAC system prior to starting cleaning. <br />H.Access to Concealed Spaces: Use existing service openings and make additional service <br />openings as required to accomplish cleaning and inspection.Other openings shall be created <br />where needed and they must be created so they can be sealed in accordance with industry codes <br />and standards. <br />1.Do not cut openings in non-HVAC components without obtaining the prior approval of Owner. <br />2.Make new openings in HVAC components in accordance with NADCA Standard 05;do not <br />compromise the structural integrity of the system. <br />3.Do not cut service openings into flexible duct;disconnect at ends for cleaning and inspection. <br />4.Closures must not significantly hinder,restrict,or alter the airflow within the system. <br />5.Closures must be properly insulated to prevent heat loss/gain or condensation on surfaces <br />within the system. <br />6.Construction techniques used in the creation of openings should conform to requirements of <br />applicable building and fire codes,and applicable NFPA,SMACNA and NADCA Standards. <br />7.Rigid fiber glass duct systems shall be resealed in accordance with NAIMA recommended <br />practices. Only closure techniques that comply with UL Standard 181 or UL Standard 181a <br />are suitable for fiber glass duct system closures. <br />8.All service openings capable of being re-opened for future inspection or remediation shall be <br />clearly marked and shall have their location reported to the owner in project report <br />documents. <br />I.Ceiling Tile: Lay-in ceiling tile may be removed to gain access to HVAC systems during the <br />cleaning process;protect tile from damage and reinstall upon completion;replace damaged tile. <br />3.04 CLEANING <br />A.Containment: Debris removed during cleaning shall be collected and precautions must be taken to <br />ensure that Debris is not otherwise dispersed outside the HVAC system during the cleaning <br />process. <br />B.Particulate Collection: Where the Particulate Collection Equipment is exhausting inside the <br />building,HEPA filtration with 99.97%collection efficiency for 0.3-micron size (or greater)particles <br />shall be used.When the Particulate Collection Equipment is exhausting outside the building, <br />Mechanical Cleaning operations shall be undertaken only with Particulate Collection Equipment in <br />place,including adequate filtration to contain Debris removed from the HVAC system. When the <br />Particulate Collection Equipment is exhausting outside the building,precautions shall be taken to <br />DocuSign Envelope ID: 94E7997D-4F29-42F6-A9B4-0A160438D2A6