Attachment J-1G - Indoor Air Quality 3900-76.pdf

U.S. DE AR TMENT OF TRANS O RTATION ORDER

FEDERA AVIATION ADMINISTRATION JO 900.76

Air Traffic Organization Policy Effect ve Date:

10/24/2019

SUBJ: Management of Indoor Air Quality (lAQ) at Air Traffic Organization (ATO) Facilities

1. Th s order establ shes A r Traff c Organ zat on (ATO) requ rements, standards, and procedures as well as del neates roles and respons b l t es for ndoor a r qual ty (lAQ). Th s standard zed approach w ll ensure lAQ ssues are properly dent f ed and m t gated at ATO owned, leased, or ma nta ned fac l t es and w ll contr bute to a safe and healthful work env ronment for employees.

2. Th s order appl es to all ATO organ zat ons and personnel n staffed ATO-owned, leased, and/or ma nta ned fac l t es.

3. The Occupat onal Safety and Health Adm n strat on (OSHA) has establ shed occupat onal exposure l m ts and enforces workplace standards. Due to the absence of spec f c lAQ regulatory standards, the ATO must follow the General Duty Clause and must also comply w th appl cable state and local lAQ regulatory requ rements for Federal fac l t es. The ATO w ll adhere to the prov s ons n current, appl cable collect ve barga n ng agreements concern ng lAQ.

Ter L. Br stol Ch ef Operat ng Off cer A r Traff c Organ zat on

Distribution: Electronic Initiated By: AJW-23

APPENDIX B

10/24/2019 JO 3900.76

RECORD OF CHANGES DIRECTIVE NO. JO 3900.76

CHANGE SUPP EME NTS CHANGE SUPP EME NTS OPTIONA OPTIONA TO TO USE USE MM DD YY MM DD YY BASIC BASIC

FAA Form 6000-25 (10/12)

Table of Contents

Paragrap Page Chapter 1. General Informat on

1. Purpose of Th s Order

2. Aud ence

3. Where Can I F nd Th s Order

4. What Th s Order Cancels

5. Explanat on of Pol cy Changes

Chapter 2. Roles and Respons b l t es

1. ATO Execut ve-level Managers

2. ATO Managers

3. ATO EOSH Serv ces Group

4. ATO Project Managers/Project Implementers

5. ATO Safety and Health Spec al sts

6. Employees

Chapter 3. Management of lAQ at ATO Fac l t es

1. ATOIAQ

2. Invest gat on of lAQ Concerns

3. M t gat on and Prevent on of lAQ Concerns

4. lAQ Invest gat on Reports

5. lAQ Tra n ng

6. Recordkeep ng

Chapter 4. Mold

1. Overv ew

2. Prevent on of Mold Growth

3. Invest gat on ofMold Concerns

4. M t gat on of Mold Concerns (Response Act ons)

Chapter 5. Adm n strat ve Informat on

1. D str but on

2. Delegat on ofAuthor ty

3. Author ty to Change Th s Order

4. Def n t ons

5. Related Publ cat ons

Append x A. Acronyms L st......................................................................................................A-1 Append x B. Key Terms and Def n t ons.................................................................................B-1 Append x C. Indoor A r Qual ty Standards...............................................................................C-1 Append x D. Document Feedback Informat on........................... D-1

Table of Contents (continued)

List of Tables

Table Page Table 1. A r Sampl ng Parameters for In t al lAQ Invest gat on Table 2. Hum d ty Rat o Levels Table 3. A r Sampl ng Parameters for Deta led lAQ Invest gat on

IV

Chapter 1. General Information

1. Purpose of This Order. Th s order establ shes the ATO’s requ rements, standards, and procedures for manag ng lAQ n ATO fac l t es. The ATO s comm tted to ma nta n ng acceptable lAQ, ant c pat ng and recogn z ng cond t ons that may adversely affect lAQ, and evaluat ng and m t gat ng spec f c lAQ concerns at ATO staffed bu ld ngs and fac l t es. When workplace lAQ s properly ma nta ned, thermal comfort, hum d ty, and concentrat ons of a rborne contam nants are kept at acceptable levels.

The ATO w ll evaluate and m t gate lAQ ssues and any potent al mpacts to employees.

Common contam nants nclude mold, volat le organ c compounds (VOCs), chem cals assoc ated w th ma ntenance and housekeep ng, formaldehyde, part culates, ozone, motor veh cle exhaust, sewer gases, and env ronmental tobacco smoke (ETS) wh ch ncludes second-hand and th rd-hand smoke and byproducts and vapors from electron c c garettes. B olog cal contam nat on, such as mold growth, s usually the result of a mo sture event n the bu ld ng/fac l ty. Mo sture events could nclude excess ve hum d ty, nter or condensat on, roof leaks, p pe ruptures, flood ng from outs de sources, and condensate overflow from heat ng, vent lat on, and a r cond t on ng (HVAC) equ pment. lAQ ssues may also result from nu sance odors, vapors, or part culates from construct on/renovat on work or from outdoor a r nf ltrat on.

The ATO w ll comply w th all OSHA regulatory standards for a rborne contam nants. The ATO w ll follow all Execut ve Orders regard ng acceptable lAQ levels and mold.

2. Audience. Th s order s ntended for use by all ATO employees and occupants n staffed fac l t es that are ATO-owned, leased, or ma nta ned.

. Where Can I Find This Order. You can f nd an electron c copy of th s order on the D rect ves Management System (DMS) webs te:

https://emplovees.faa.gov/tools resources/orders not ces/. Or go to the MyFAA employee webs te, select “Tools & Resources” and then select “Orders and Not ces”.

4. What This Order Cancels. Th s order cancels the ATO gu dance documents ent tled Indoor A r Qual ty Implementat on Gu dance and Gu dance for the Management of Mold n FAA Fac l t es (both dated September 30, 2006).

5. Explanation of Policy Changes. Th s order establ shes ATO lAQ pol cy and replaces prev ous ATO lAQ gu dance documents.

https://emplovees.faa.gov/tools_resources/orders_notices/

Chapter 2. Roles and Responsibilities

1. ATO Executive-level Managers must ensure compl ance w th and ncorporate the requ rements of th s order nto programs and act v t es managed by the r organ zat ons, part cularly those nvolv ng deployment ofnew systems and modern zat on projects that could mpact lAQ.

2. ATO Managers. ATO Managers must:

a. Manage the requ rements of and ensure compl ance w th th s order.

b. Coord nate w th Real Estate Contract ng Off cer to ensure that lease agreements and bu ld ng cond t ons meet acceptable lAQ requ rements as outl ned n th s order.

c. Complete the ATO Manager’s lAQ Awareness tra n ng as requ red by th s order.

d. Coord nate w th the Project Manager/ Project Implementer to ensure that lAQ requ rements, nclud ng appropr ate eng neer ng controls, are ncorporated nto all construct on, renovat on, demol t on, nstallat on, comm ss on ng, and other mod f cat on projects managed by the r organ zat on.

e. Ensure the use of appl cable work perm ts and the latest rev s on ofATO Order JO 3900.57, Env ronmental and Occupat onal Safety and Health (EOSH) Requ rements n the Plann ng and Execut on of Construct on and Ma ntenance Act v t es at Nat onal A rspace System (NAS) Fac l t es for projects w th n the r fac l ty.

f. Ensure t mely evaluat on of lAQ concerns w th n the r fac l ty and promptly n t ate necessary response act ons. Ensure proper and effect ve prevent ve measures are performed to ma nta n acceptable lAQ as requ red by th s order.

g. Coord nate w th the ATO Safety and Health Spec al st, ass gned to support the r organ zat on, regard ng lAQ ssues and nc dents.

h. Ensure that employees who have respons b l ty n address ng and manag ng ATO lAQ ssues rece ve lAQ awareness tra n ng as requ red by th s order.

. Ensure records of lAQ nc dents, reports, and correct ve act ons are ma nta ned.

j. Inform the ATO Safety and Health Spec al st of lAQ nc dents/water ntrus on events and the r statuses.

k. Ensure appropr ate not f cat on to barga n ng un ts of lAQ nc dents and projects potent ally affect ng lAQ n the r fac l ty.

l. Ensure that all project spec f cat ons and plans are rev ewed to dent fy act v t es that may affect lAQ.

m. Ensure proper and effect ve prevent ve measures are performed to ma nta n acceptable lAQ as requ red by th s order.

. ATO EOSH Services Group. The ATO EOSH Serv ces Group must:

a. Des gnate a nat onal ATO lAQ Techn cal Lead.

b. Serve as the Off ce of Pr mary Respons b l ty (OPR) to rev se th s order.

c. Develop, d ssem nate, and rev se lAQ gu dance and/or pol cy documents as necessary to supplement th s order.

d. Prov de techn cal gu dance, ass stance, and requ rements to all ATO organ zat ons regard ng lAQ.

e. Coord nate w th and prov de techn cal ass stance to the Off ce of Safety and Techn cal Tra n ng (AJI) on lAQ tra n ng requ rements for ATO employees.

4. ATO Project Managers/Project Implementers. ATO Project Managers/Project Implementers must:

a. Not fy the ATO Safety and Health Spec al st of all eng neer ng packages assoc ated w th projects n staffed fac l t es and prov de the eng neer ng package to them as necessary.

b. Ensure the use of appl cable work perm ts and ensure that ATO Order JO 3900.57 forms are completed.

c. Incorporate ATO lAQ requ rements and appropr ate eng neer ng controls nto all construct on, renovat on, demol t on, nstallat on, comm ss on ng, and other mod f cat on projects they manage.

d. Rev ew all project spec f cat ons and plans to dent fy act v t es that may affect lAQ and ensure that correct ve measures w ll m t gate the lAQ concerns. Ensure that lAQ compl ance costs assoc ated w th the project are ncluded n project cost est mates.

e. Coord nate project plann ng w th the respons ble, geograph cal ATO Manager(s) and ATO Safety and Health Spec al st.

f. Ensure that lAQ compl ance costs assoc ated w th project-spec f c sampl ng, abatement, m t gat on, or eng neer ng control requ rements are ncluded n all cost est mates.

g. Apply H gh-Performance Susta nable Bu ld ng (HPSB) gu d ng pr nc ples as requ red by the Federal Av at on Adm n strat on (FAA) n Leadersh p n Energy and Env ronmental Des gns

(LEED).

5. ATO Safety and Health Specialists. ATO Safety and Health Spec al sts must:

a. Serve as the geograph cal/organ zat on lAQ techn cal po nt of contact.

b. Conduct lAQ-related act v t es as requ red by th s order.

c. Rev ew plans and spec f cat ons for all planned projects n staffed fac l t es that may affect lAQ.

d. Ma nta n records of lAQ nc dents, reports, and correct ve act ons.

e. Complete the lAQ Awareness Tra n ng as requ red by th s order.

6. Employees. Employees must:

a. Conduct the r work operat ons n such a way that work does not create lAQ problems.

b. Not alter or h nder the operat on ofHVAC systems unless otherw se author zed.

c. Not fy the r superv sor or the ATO Safety and Health Spec al st of lAQ concerns and water ntrus on events n the r respect ve work area(s).

d. Complete lAQ tra n ng as ass gned.

Chapter 3. Management 6f lAQ at ATO Facilities

1. ATO lAQ. The ATO w ll ensure aeceptable lAQ s ma nta ned n staffed ATO fac l t es.

2. Investigation of lAQ Concerns.

a. Initial lAQ Site Investigation. The n t al LAQ s te nvest gat on w ll cons st of an n t al lAQ s te assessment, followed by an n t al lAQ s te nvest gat on f needed.

(1) In t al lAQ S te Assessment. In t ate an n t al lAQ s te assessment when lAQ related health concerns are reported. Th s n t al assessment s l m ted n scope and ncludes a d scuss on w th affected employees, a walkthrough nspect on to dent fy obv ous causes of reported problems, and an assessment of equ pment and systems operat ng n the area that may be affect ng bu ld ng lAQ. The n t al lAQ s te assessment w ll be conducted by the ATO Safety and Health Spec al st or the r qual f ed des gnee. The n t al lAQ s te assessment may also be conducted by the ATO fac l ty manager, who must report the f nd ngs to the ATO Safety and Health Spec al st. The ATO fac l ty manager must have completed the tra n ng as spec f ed n Sect on 5 ofth s Chapter n order to conduct the n t al lAQ s te assessment. The results ofthe n t al assessment w ll determ ne f further nvest gat on s requ red by the ATO Safety and Health Spec al st.

(2) In t al lAQ S te Invest gat on. If the n t al s te assessment reveals that an n t al s te nvest gat on s needed, the ATO Safety and Health Spec al st w ll conduct an n t al s te nvest gat on follow ng the requ rements n sect ons (2)(a)(3) and (2)(a)(4) below. The ATO Safety and Health Spec al st w ll use the results of th s n t al lAQ s te nvest gat on to determ ne f a deta led lAQ nvest gat on s needed.

(3) In t al Screen ng Cr ter a. In t al screen ng cr ter a should nclude dent fy ng v s ble mold growth or the presence ofmo sture ntrus on on bu ld ng mater als, odors and potent al contam nants generated from nternal or external act v t es, and the presence ofnew furn sh ngs or bu ld ng mater als.

(4) In t al lAQ Invest gat on A r Sampl ng Parameters. The follow ng tables present generally acceptable target values of commonly dent f ed and sampled parameters n lAQ nvest gat ons. Further nvest gat on w ll be requ red f the measured values are outs de of the target values.

Table 1. Air Sampling Parameters for Initial lAQ Investigation lAQ Parameter Target Value ‘

Carbon d ox de (CO2) 700 ppm^ above outdoor a r Carbon monox de (CO) ND 2 (< 5 ppm) 3

20 percent to 60 percent; Hum d ty rat o of Relat ve hum d ty between 0.0031 and 0.0124 “ Temperature 68-82° F =

Notes:

1 Target values are subject to change based on future revisions of standards and regulations.

2 ND = Not detected (use the value if the analytical instrument can detect to this level).

Table 2. Humidity Ratio Levels lAQ Parameter Target Values

Temperature 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 Target max mum relat ve 75 72 70 67 65 63 61 59 57 55 53 52 50 48 47 hum d ty at 1.1 percent hum d ty rat o * ppm = parts per million.

4 Humidity ratio is the mass of water vapor per unit mass of dry air. The range of20 percent to 60 percent is provided for initial guidance. In some cases, 60 percent relative humidity may be required for the reduction of static charges on NAS equipment. However, sustained levels above 60 percent can lead to fungal growth.

Reference: American National Standards Institute (ANSI) American Society ofHeating, Refrigerating, and Air-Conditioning Engineers (ASHRAE) Standard 55-2010, Thermal Environmental Conditions for Human Occupancy.

5 Temperature range is dependent on season, weather conditions, and time of day.

Notes:

Temperature and relative humidity levels have a maximum target value of 1.1 percent humidity ratio level.

Exceeding the target value may cause fungal growth from air moisture alone. When accessing lAQ parameters, evaluate conditions using information from this table. Temperature target values in the table are in F°.

b. Detailed lAQ Investigations.

(1) Deta led lAQ Invest gat ons. Ifthe n t al lAQ s te nvest gat on results determ ne that add t onal nvest gat on s needed, the ATO Safety and Health Spec al st or the r qual f ed des gnee must perform a more deta led lAQ nvest gat on. The deta led lAQ nvest gat on w ll progress n steps to nclude, as appropr ate, a rev ew of s te background nformat on, a bu ld ng evaluat on, an HVAC system evaluat on, and sampl ng. The complex ty of the s tuat on w ll d ctate the scope and determ ne f add t onal ATO or contracted techn cal expert se s requ red.

When develop ng the scope ofwork for the deta led evaluat on, nclude the follow ng, where appl cable:

(a) A h story of the concern.

(b) Sample collect on object ves.

(c) Sample locat ons and frequency.

(d) Sample collect on equ pment, methods, and procedures.

(e) Sample handl ng, transport ng, and analyt cal test ng methods and cert f cat on

(e.g., an dent f cat on of the Amer can Industr al Hyg ene Assoc at on (AIHA) accred ted laboratory used for the analys s).

(f) Inspect on procedures for relevant components ofthe HVAC system ( nclud ng bu ld ng a r ntakes for entra nment ofbu ld ng, bathroom, or generator exhaust, or other contam nat on sources).

(g) An explanat on ofthe compar son of sample results to appl cable standards and cr ter a.

(h) A wr tten report of f nd ngs and recommendat ons for correct ve act ons.

(2) A r Sampl ng Parameters for Deta led lAQ Invest gat on. A r sample eolleCt on and analys s w ll be based on s te-spec f e eoncems and at the d seret on of the lAQ nvest gator.

Potent al sampl ng parameters are l sted n the table below; however, th s l st s not comprehens ve. Further nvest gat on w ll be requ red f the measured values exceed the target values.

Table . Air Sampling Parameters for Detailed lAQ Investigation lAQ Parameter Target Vajue ‘

Formaldehyde (CH2O) <27 ppb Hydrogen sulf de (H2S) ND (<0.2 ppm) ’’ ^ N trogen d ox de (NO2) ND(<100 pg/m^) ’’5 Ozone (O3) ND(<50ppb)’-« Part culates (PM 2.5)’ (<15 pg/m^) 5’5 Part culates (PM 10)’ (<50 pg/m^) Sulfur d ox de (SO2) ND(<80 pg/m3)’ = Total volat le organ c compounds (VOC analyt cal) <0.8 ppm

Notes:

1 Target values are subject to change based on future revisions of standards and regulations.

2 ND = Not detected (use the value ifthe analytical instrument can detect to this level).

ppm = parts per million.

4 Identified as “concentrations of interest” in ANSI/ASHRAE Standard 62.1-201 .

5 pg/m^ = microgram per cubic meter of air.

6 ppb = parts per billion.

7 PM = particulate matter.

8 If outdoor concentrations are higher, use these as the target value.

9 Mean indoor particle levels should be less than mean outdoor levels.

. Mitigation and Prevention of lAQ Concerns.

a. Development of Control Strategies and Corrective Measures.

(1) A qual f ed Safety and Health Spec al st w ll determ ne the proper control strateg es and/or correct ve measures once the nvest gat on process dent f es the source(s) ofthe lAQ problem(s). The ATO manager w ll coord nate w th the respons ble nd v dual or organ zat on for the mplementat on of correct ve act ons prov ded n the nvest gat on report n accordance w th FAA pol cy. Control strateg es are character zed as:

(a) Source Control. Ident fy, control, and remove the pollutant sources where feas ble. Ozone-form ng equ pment s not allowed n staffed ATO fac l t es for contam nant removal.

(b) Vent lat on. To m n m ze the accumulat ons of contam nants, t may be necessary to mod fy the vent lat on system to ncrease the quant ty of outdoor a r, or mprove the a r d str but on. Outdoor a r supply cannot exceed an HVAC system’s ab l ty to remove mo sture (latent load). When adjust ng the amount of outdoor a r, exerc se caut on to ensure the HVAC system can ma nta n appropr ate hum d ty levels. Mod f cat ons to the HVAC system must be coord nated w th the respons ble fac l ty HVAC ma ntenance personnel.

(c) F ltrat on. Enhance ex st ng or ncorporate spec al zed f ltrat on to remove spec f c pollutants from enter ng v a the bu ld ng suppl ed a r vent lat on system.

(d) Decontam nat on and M t gat on. Clean the HVAC system components or other source of contam nants as needed.

(e) Adm n strat ve Controls. M n m ze the use of chem cals and other mater als that could adversely affect lAQ. It may be necessary to relocate employees away from the area where the mater als are used. Cons der us ng these mater als when the bu ld ng s least occup ed.

Rev ew safety data sheets (SDSs) for all chem cals pr or to them enter ng the fac l ty.

(2) Implement control measures for lAQ contam nants dur ng construct on, renovat on, demol t on, nstallat on, comm ss on ng, and other mod f cat on projects.

(3) Ensure correct ve measures do not further adversely affect the bu ld ng lAQ.

(4) Val date and document the effect veness ofthe correct ve measures.

b. Preventive Measures.

(1) Proper and effect ve prevent ve measures w ll have a pos t ve mpact on fac l ty lAQ and reduce nc dents. Prevent ve measures nclude:

(a) Ma nta n bu ld ng equ pment and HVAC systems as spec f ed n FAA orders, ma ntenance techn cal handbooks (MTHB), and manufacturers’ recommendat ons.

(b) Manage processes to el m nate or m n m ze the potent al pollutant sources n the ndoor env ronment.

(2) Proper and effect ve management of construct on, renovat on, demol t on, nstallat on, comm ss on ng, and other mod f cat on projects:

(a) Rev ew all construct on processes and bu ld ng operat ons pr or to project n t at on to dent fy potent al mpact to bu ld ng lAQ.

(b) Ident fy and mplement control measures for all act v t es generat ng dusts and odors n order to prevent contam nants from m grat ng nto occup ed areas of the bu ld ng.

(c) Adhere to OSHA regulat ons and related FAA d rect ves such as ATO Order JO 3900.57.

(d) Rev ew and approve all contractors’ SDSs for mater als and chem cals pr or to the r use on s te.

(e) Ensure that bu ld ng mechan cal systems are not d srupted dur ng construct on, wh ch can adversely affect bu ld ng lAQ. Dur ng construct on act v t es, aux l ary heat ng and cool ng may be requ red. Dur ng work act v t es, protect the HVAC systems from nu sance dust and contam nants.

(f) Potent al a r contam nants commonly dent f ed on construct on projects can nclude the follow ng:

( ) Nu sance dusts and aerosols.

( ) Regulated mater als such as asbestos and lead, wh ch requ re spec f c work pract ces dent f ed n regulat ons and FAA d rect ves.

( ) Odors and other contam nants produced by construct on mater als and act v t es.

( v) Newly nstalled products that may adversely affect lAQ by releas ng off-gas pollutants.

(v) Smoke, odors, and part culates generated by hot work and weld ng operat ons. These operat ons requ re work perm ts, as spec f ed n FAA pol c es and procedures, and add t onal control measures.

(v ) Water nf ltrat on and mold growth caused by temporary open ngs n the bu ld ng envelope.

(v ) Condensat on due to temperature d fferences n fac l t es w thout proper nsulat on.

(g) Appropr ate housekeep ng pract ces are mportant to ma nta n ng fac l ty lAQ.

These pract ces nvolve clean ng methods and the use ofproducts that m n m ze the ntroduct on ofpollutants nto the bu ld ng env ronment.

4. lAQ Investigation Reports.

a. At the complet on of an lAQ nvest gat on, generate a report of f nd ngs w th any recommended correct ve measures. The follow ng persons must rece ve a copy ofthe lAQ nvest gat on report:

(1) ATO fac l ty management.

(2) ATO Safety and Health Spec al st.

(3) Others respons ble for mplement ng correct ve act ons.

(4) Fac l ty barga n ng un t representat ves, follow ng collect ve barga n ng agreements.

b. Report Preparation. The type of report generated depends on the complex ty of the lAQ nvest gat on and lAQ ssues. When prepar ng the report, prov de the follow ng f appl cable:

(1) Prov de an execut ve summary dent fy ng the reason for the evaluat on. Include any health concerns noted by bu ld ng occupants. It should also descr be s gn f cant f nd ngs and prov de a summary of recommendat ons.

(2) Descr be the sampl ng methodology, sampl ng equ pment used, and the sampl ng strategy. Include the l m tat ons of sampl ng protocols and l m ts of detect on for part cular contam nants based upon the sampl ng method.

(3) Prov de a d scuss on of s te observat ons, survey f nd ngs, and an nterpretat on of data collected. Clearly reference the regulatory, consensus, or FAA standards used to nterpret the data. Prov de the follow ng:

(a) Include all measurements obta ned by d rect-read ng nstrumentat on n a format that clearly dent f es the measurement locat ons, t mes, and results.

(b) Include laboratory analyt cal data n a format that clearly dent f es the sampl ng locat ons, sample parameters, and the laboratory analys s results. Include laboratory accred tat ons.

(c) Include photograph c documentat on, f appl cable, w th descr pt ons of the photograph locat on and a narrat ve. Include the date and t me for the photographs to ass st n determ n ng pre- and post-remed at on cond t ons and prov de scale f poss ble.

(4) Prov de deta led recommendat ons for correct ve act ons of any def c enc es dent f ed n the survey. Descr be nter m correct ve measures mplemented dur ng the nvest gat on to address the nvest gat on’s f nd ngs.

(5) Include any support ng documentat on w th the report. The support ng documentat on must nclude cha n-of-custody forms, laboratory analyt cal reports, d rect-read nstruments cal brat on cert f cates, f eld cal brat on documentat on, and sample collect on data.

Documentat on of equ pment cal brat ons must follow the Nat onal Inst tute of Standards and Technology (NIST) pr mary reference standards.

(6) Prov de a l st of the names, roles, accred tat on, l censes, company addresses, and phone numbers of the Cert f ed Industr al Hyg en st (CIH), Industr al Hyg en st (IH), or other qual f ed Safety and Health Spec al st that part c pated n the project and those that collected the samples.

(7) Document all qual ty control procedures conducted regard ng project sampl ng.

5. lAQ Training. ATO employees must rece ve tra n ng cons stent w th the r dut es. The courses must meet appl cable Federal regulat ons and FAA standards.

a. ATO Manager’s lAQ Awareness Training. lAQ awareness tra n ng w ll be prov ded to all ATO managers and superv sors. Th s tra n ng s a pre-requ s te for the two ATO lAQ awareness courses l sted below.

b. ATO Technical Operations Personnel lAQ Awareness Training. lAQ awareness tra n ng w ll be prov ded to ATO Techn cal Operat ons perso mel who des gn, construct or oversee projects at fac l t es and who perform ma ntenance on fac l ty HVAC systems.

c. ATO Safety and Health Specialist lAQ Awareness Training. lAQ awareness tra n ng w ll be prov ded to ATO Safety and Health Spec al sts.

d. Mold Inspection and Assessment Training. Tra n ng s requ red for ATO employees who are respons ble for assess ng water ntrus on and mold n the workplace and conduct ng mold sampl ng. The tra n ng prov des nstruct on on nterpret ng sample results lead ng to recommended solut ons.

e. Mold Remediation Supervisor Training. Tra n ng s requ red for ATO employees who are respons ble for conduct ng mold remed at on projects or prov d ng mold remed at on project overs ght.

6. Recordkeeping. Ma nta n lAQ records n accordance w th FAA orders and regulat ons nclud ng 29 CFR 1910.1020. Reta n these records n a ma mer that meets pr vacy and secur ty requ rements per FAA Order 1370.121 FAA Informat on Secur ty and Pr vacy Program and Pol cy.

Chapter 4. Mold

1. Overview. Th s chapter prov des nformat on and procedures for prevent on ofmold growth, and nvest gat on and m t gat on ofmold concerns.

2. Prevention of Mold Growth. Mold growth ndoors can cause or exacerbate health effects n suscept ble nd v duals. The ATO w ll respond promptly to water ntrus on events n order to prevent mold from grow ng n ATO fac l t es.

a. Response to a Water Intrusion Event.

(1) Evaluat ng a Water Intrus on Event. Water sources from water ntrus on events must be categor zed to determ ne the assoe ated r sks and the sampl ng and response act ons that need to be performed. The response act ons must be appropr ate for the category of the water source and the s te-spec f c cond t ons. Categor es ofwater can qu ckly degrade nto h gher categor es due to contam nat on. Water sources are eategor zed by the Inst tute of Inspect on, Clean ng and Restorat on Cert f cat on (IICRC) S500 Standard and Reference Gu de for Profess onal Water Damage Restorat on as follows:

(a) Category 1 Water Source: Clean water from a san tary source (e.g., water supply l nes, ra nwater, and snowmelt from rooftops).

(b) Category 2 Water Source: “Gray” water from an unsan tary source that conta ns some degree of eontam nat on that could cause s ckness or d scomfort f consumed by humans (e.g., wash ng mach ne overflows, to let overflows, and non-feces waters).

(c) Category 3 Water Source: “Black” water eonta n ng pathogen c agents that could cause d sease or death f consumed by humans (e.g., sewage backups and overflows from beyond to let traps, feces, floodwaters and groundwater ntrus on).

(2) Work Procedure for In t al Response Measures Follow ng a Water-Intrus on Event.

(a) Follow ng a water- ntrus on event, dent fy the water source, stop the water source from cont nu ng to mpact the bu ld ng, and mmed ately n t ate water extract on and dry ng efforts. Rap d response efforts typ cally prevent mold growth.

(b) After dent fy ng the Water Source Category as descr bed n Paragraph 2(a)(1) above, determ ne the r sk and appropr ate m t gat on aet ons requ red for the spec f c water ntrus on event.

(c) Once the water source s dent f ed, take act on to prevent add t onal water damage. Certa n water leaks may occur over a long t me and may not be dent f ed when the water ntrus on s n t ally not ced. Ensure that permanent f xes are n place pr or to bu ld-back and restor ng bu ld ng mater als.

(d) W th n 48 hours ofwater damage from clean water (Category 1) sources, dry all bu ld ng mater als to a mo sture level at or below 15 percent, as measured w th a mo sture meter, so as not to support mold growth.

(e) Remove and d scard all porous mater als contam nated w th sewage or other Category 2 or 3 water sources. Clean and d s nfeet contam nated non-porous mater al. Due to the potent al for human llness assoe ated w th sewage eontam nated mater als, add t onal Personal Proteet ve Equ pment (PPE) and work procedures w ll he requ red.

(f) If bu ld ng mater als are not suff c ently dr ed w th n 48 hours, contact an ATO Safety and Health Spec al st or the r qual f ed des gnee to determ ne f mold remed at on s needed. Mon tor all water damaged bu ld ng mater als unt l they are thoroughly dr ed to a mo sture content at or below 15 percent. If unable to be thoroughly dr ed, remove and d scard mater als as ord nary construct on debr s. Remove and d scard porous mater als f v s ble mold growth s present. Non-porous mater als w th v s ble mold or that came nto contact w th contam nated water must be cleaned and thoroughly dr ed.

(g) Pr or to mpact ng bu ld ng mater als, rev ew asbestos conta n ng mater al and lead based pa nt survey reports to ensure these and any other regulated mater als, fpresent, are handled appropr ately. Also, ensure that the f re rat ng w ll not been comprom sed by the work.

(h) The Env ronmental Protect on Agency (EPA) does not recommend b oc de use as a rout ne pract ce dur ng mold remed at on, although there may be nstances where Safety and Health Spec al sts judgment may warrant the use of b oc des. Contact the ATO Safety and Health Spec al st for proper use and appl cat on of b oc des.

. Investigation of Mold Concerns,

a. Mold Assessment.

(1) Water damaged bu ld ng mater als not thoroughly dr ed w th n 48 hours must be assessed to determ ne f the mater als must be removed, part cularly f mold s present. The assessment must be conducted by the ATO Safety and Health Spec al st or the r qual f ed des gnee and must nclude the follow ng:

(a) Class f cat on of the water source.

(b) Determ nat on of the l kely durat on ofwater ntrus on ( n hours, days, weeks, months, or years).

(c) Determ nat on ofthe extent of wet or damaged bu ld ng mater als.

(d) Extent of v s ble mold present.

(e) Recommendat on of nter m measures unt l remed at on and restorat on operat ons can be n t ated.

(f) Evaluat on ofpotent al project d srupt ons to the NAS, f re l fe safety, and other cr t cal ATO operat ons as well as the health and safety ofthe bu ld ng occupants.

(2) Prevent ve Measures for Ident f ed or Suspected Mold. Once mold s dent f ed or suspected, take prevent ve measures to m n m ze d sturbance of affected mater als that could cause mold spores to become a rborne and negat vely affect lAQ. In t ate correct ve act ons based upon the amount ofmold present and other s te-spec f c factors. The ATO Safety and Health Spec al st must prov de a Response Act on Plan and the ATO manager must make not f cat ons as requ red by the appropr ate collect ve barga n ng agreements.

(3) Control Measures. Some nvest gat ve and n t al correct ve act v t es, such as assess ng potent al mold and mo sture sources ns de wall cav t es, may requ re control measures such as restr ct ng access and perform ng part culate and dust control. The ATO Safety and

Health Spec al st or the r qual f ed des gnee w ll determ ne the appropr ate control measures based on the s te cond t ons and act v t es requ red.

b. Sampling and Analysis.

(1) S nce mold remed at on efforts are the same regardless of the type(s) ofmold present, sampl ng s typ cally not necessary to character ze the mold. Sampl ng to character ze the mold may be necessary to prov de nformat on to med cal personnel treat ng an nd v dual d agnosed w th adverse health effects that are potent ally assoc ated w th occupat onal mold exposure.

(2) Mold Sampl ng Plan.

(a) A CIH or other qual f ed Safety and Health Spec al st under the d rect on of a CIH must develop a wr tten sampl ng plan prov d ng sound just f cat on when mold sampl ng s to be performed. An ndustr al hyg en st or qual f ed Safety and Health Spec al st mder the d rect on ofthe CIH w ll collect samples and conduct v sual post-remed at on evaluat ons.

(b) The wr tten sampl ng plan must nclude the sampl ng methodology to be used, the Laboratory’s AIHA accred tat on cert f cate, and the laboratory’s address and phone number.

Samples must be subm tted for analys s to accred ted AIHA Env ronmental M crob ology Laboratory Accred tat on Program (EMLAP) laborator es.

(3) Laboratory Sample Results. A CIH or other qual f ed Safety and Health Spec al st w th exper ence n mold nvest gat ons must nterpret the laboratory sample results. Cop es of sample results and reports must be prov ded n accordance w th ATO collect ve barga n ng agreements.

(4) Unapproved Sampl ng Techn ques. The follow ng sampl ng techn ques are not approved for use w th respect to mold at ATO fac l t es at th s t me:

(a) Mycotox n sampl ng.

(b) Interst t al wall sampl ng (e.g.. Wall Check®).

(c) Settl ng plates.

(d) Total mold volat le organ c compounds.

(e) Part culate counters.

4. Mitigation of Mold Concerns (Response Actions).

a. Routine Maintenance and Cleaning Activities. If v s ble mold growth s dent f ed dur ng ma ntenance act v t es, the ATO Safety and Health Spec al st or the r qual f ed des gnee w ll determ ne appropr ate eng neer ng controls or need for mold-remed at on procedures.

Remov ng a few ce l ng t les, replac ng a r-handl ng un t f lters, and rout ne clean ng ofHVAC components are not cons dered mold-remed at on act v t es because they can be accompl shed us ng m n mal eng neer ng controls and do not typ cally result n s gn f cant mold-spore d sturbance f conducted properly.

b. Minor Mold Remediation Projects.

(1) Ident fy ng a M nor Mold Remed at on Project. Projects w th less than ten (10) square feet ofv s ble mold growth are typ cally cons dered m nor remed at on projects. Some m nor mold remed at on projects may have s gn f cant potent al to release mold spores because of the r locat on, type of mater al affected, a rflow patterns, or other spec f c s te cond t ons that may warrant add t onal controls beyond those prov ded n th s sect on. The total amount ofmold present shall not be d v ded nto separate smaller areas to reduce the eng neer ng controls, PPE, or need for post remed at on evaluat ons. The ATO Safety and Health Spec al st or the r qual f ed des gnee w ll determ ne the appropr ate response methods and wh ch category ofmold remed at on to use.

(2) Work Procedures for M nor Mold Remed at on Projects. Work procedures for m nor mold remed at on projects nclude the follow ng;

(a) Mo sture Ident f cat on and Repa r. Ident fy and n t ate temporary or permanent repa rs ofmo sture- ntrus on sources f poss ble to prevent cont nued water damage.

(b) L m ted Eng neer ng Controls to M n m ze Dust. A conta nment may not be necessary to control mold spore m grat on on m nor projects f mold affected bu ld ng mater als can be removed w thout d sturb ng the mold. L m ted eng neer ng controls nclude the use of wet methods, vacuums equ pped w th H gh-Eff c ency Part culate A r (HEPA) f lters, d sposable polyethylene drop cloths, and the prompt cleanup and d sposal of mold contam nated mater als.

(c) Use ofAppropr ate PPE. M nor mold remed at on projects are not ant c pated to generate s gn f cant mold aerosols. Ut l ze resp ratory protect on cons st ng of an N95 (f lter ng face p ece) d sposable mask. Employees must be tra ned and obta n med cal clearance pr or to use ofN95 d sposable dust masks. Use goggles w th no s de vents or appropr ate eye protect on, and wear gloves to prevent sk n contact.

(d) Removal of Affected Porous Mater als. Remove mater als ntact whenever poss ble to m n m ze mold spores from becom ng a rborne. Place affected mater als nto d sposal conta ners mmed ately after removal.

(e) Clean ng ofNon-Porous Mater als. Clean the rema n ng substrates and any other non-porous mater als us ng HEPA vacuums and a detergent n water solut on. Allow mater als to dry thoroughly.

(f) Proper Waste D sposal. Place contam nated mater als nto a rt ght conta ners at the removal s te. Pr or to seal ng the conta ners, evacuate excess a r us ng a HEPA vacuum.

HEPA vacuum or wet w pe the outs de ofwaste conta ners mmed ately before transport ng.

Conta ners may be d sposed of as ord nary construct on debr s f no regulated mater als, such as asbestos, are present.

(g) Conduct ng a Post-Remed at on Evaluat on. Conduct a v sual evaluat on when the contam nated mater als have been removed and the rema n ng mater als have been cleaned and dr ed to ensure no v s ble mold growth rema ns.

(h) Correct on of the Mo sture Source. The source of the mo sture that contr buted to the mold growth must be dent f ed and correct ve act ons taken to prevent add t onal water ntrus on and prevent future mold growth.

( ) Bu ld-back Restorat on. Bu ld back efforts should only beg n after all the steps above have been completed and the repa r ofthe mo sture ntrus on source has been determ ned to be completed and effect ve.

c. Major Mold Remediation Projects (Non-HVAC). The follow ng sect on appl es to major mold remed at on projects that do not nvolve HVAC systems. See Sect on 4(d) below for HVAC mold remed at on procedures.

(1) Ident fy ng a Major Mold Remed at on Project. Major mold remed at on projects nclude one or more ofthe follow ng cond t ons:

(a) Greater than 10 square feet ofv s ble mold growth. The ATO Safety and Health Spec al st w ll evaluate each project greater than 10 square feet and, based upon s te cond t ons, determ ne f the project can be conducted us ng less str ngent protocols.

(b) Suspected mold growth of an unknown quant ty (e.g., water saturated gypsum wallboard or an nternal water leak where the full extent ofthe mpacted area s not v s ble).

(c) Mold growth or water damage result ng from a sewage contam nated or other unclean water source.

(d) Mold growth underneath wallpaper or other mperv ous cover ngs l ke f ber re nforced plast c (FRP).

(2) Work Procedures for Major Mold Remed at on Projects. Work procedures for major mold remed at on projects nclude the follow ng:

(a) Des gn ng the Major Mold Remed at on Projects Project. A CIH or ATO Safety and Health Spec al st must des gn the project us ng an ATO approved scope of work. The ATO Safety and Health Spec al st must approve all contractor remed at on spec f cat ons, SDSs and subm ttals pr or to the start ofthe project.

(b) Us ng Eng neer ng Controls to Prevent Mold Spore M grat on. Eng neer ng controls to prevent mold spore m grat on must nclude the follow ng:

( ) Deact vate and Isolate the HVAC system: Isolate the HVAC system from the conta nment area w th cr t cal barr ers.

( ) Construct a Work Area Enclosure: Construct a work area enclosure w th a decontam nat on chamber cons st ng of a m n mum of two stages for all entrances and ex ts of people, equ pment, and waste. The decontam nat on chamber must conta n an a r lock system to ma nta n negat ve pressure. The preferred a r lock conta ns three chambers w th four overlapp ng flap doors. However, f there s nadequate floor space, a two-chamber a r lock may be used. Isolat on barr ers must be constructed us ng f re-retardant polyethylene sheet ng or other appropr ate mater als.

( ) Establ sh Negat ve A r Pressure: Establ sh negat ve a r pressure w th n the conta nment us ng HEPA f ltrat on equ pment, d scharg ng the exhausted a r to the outdoors whenever poss ble. The number ofnegat ve a r mach nes must be suff c ent to create a negat ve pressure ns de the conta nment enclosure n relat on to the area outs de the conta nment enclosure, tak ng nto account cond t ons that could affect pressure relat onsh ps (e.g., elevators, exhaust fans, or other exhaust appl ances).

(c) Us ng Appropr ate PPE. Use appropr ate PPE dur ng all major mold remed at on projects ant c pated to generate s gn f cant a rborne mold spores. At a m n mum, PPE appropr ate for these jobs must nclude the follow ng:

( ) Resp ratory protect on cons st ng of a negat ve pressure a r-pur fy ng half-face resp rator equ pped w th P95 or better f lters. Employees who are requ red to use resp ratory protect on must be tra ned, f t tested and obta n med cal clearance pr or to use.

( ) Goggles w th no s de vents, or other appropr ate eye protect on.

( ) D sposable full-body coverall w th head and foot cover ngs.

( v) Gloves to prevent sk n contact w th mold dur ng the removal process.

(v) Adequate fall protect on PPE and procedures as needed.

(v ) Any other PPE deemed appropr ate for the hazards present n the workplace.

(d) Remov ng Affected Porous Mater als. Remove mater als ntact where poss ble to m n m ze a rborne mold spores. Place affected mater als nto d sposal conta ners mmed ately after removal.

(e) Clean ng Non-Porous Mater als. Clean the rema n ng substrates and any other non-porous mater als us ng HEPA vacuums and a detergent n water solut on. Allow mater als to dry thoroughly.

(Q Ant -M crob al Coat ngs. The appl cat on of ant -m crob al coat ngs must not be for b oc dal purposes but rather as a prevent ve measure on porous mater als that were not removed as part ofthe remed at on project. Apply the ant -m crob al coat ngs after a thorough clean ng of the surface of the mater als.

(g) Inst tut ng Proper Waste D sposal. Place contam nated mater als nto a rt ght conta ners. Pr or to seal ng the conta ners, evacuate excess a r us ng a HEPA vacuum. HEPA vacuum or wet-w pe the outs de ofwaste conta ners mmed ately before transport ng.

Conta ners should be d sposed of as ord nary construct on debr s f no regulated contam nants are present.

(h) Conduct ng a Post-Remed at on Evaluat on. Once the contam nated porous mater als are removed and the rema n ng non-porous mater als are cleaned and dr ed, the post-remed at on evaluat on must be conducted pr or to the release of the work area. The evaluat on cr ter a are presented n Subsect on 4(e) of th s chapter.

( ) Correct on of a Mo sture Source. The source of the mo sture that contr buted to the mold growth must be dent f ed and correct ve act ons taken to prevent add t onal water ntrus on and prevent future mold growth.

d. Major Mold Remediation Projects in HVAC Systems.

(1) Ident fy ng a Major HVAC Mold Remed at on Project. Any amount ofv s ble mold growth on permanent components of HVAC systems or n a r plenums s cons dered a major project. Mold remed at on projects n HVAC systems or a r plenums have a h gh probab l ty of releas ng mold spores nto the a r and can spread a rborne mold spores to other areas ofthe bu ld ng.

(2) Work Procedures for Mold Remed at on Projects n HVAC Systems. Work procedures for mold remed at on projects n HVAC systems nclude the follow ng;

(a) Project Des gn. A CIH exper enced n mold remed at on must des gn mold remed at on projects n HVAC systems or a r plenums. The ATO Safety and Health Spec al st or the r qual f ed des gnee must approve all contractor remed at on spec f cat ons, SDSs, and subm ttals pr or to the start of the project.

(b) Eng neer ng Controls to Prevent Mold Spore M grat on. The nter or components of the HVAC system, nclud ng ductwork extend ng to other areas ofthe bu ld ng, must be solated through the construct on of cr t cal barr ers. The preferred a r lock for an HVAC mold remed at on project conta ns three chambers w th four overlapp ng flap doors.

However, f there s nadequate floor space, a two-chamber a r lock system may be used.

Construct solat on barr ers us ng f re-retardant polyethylene sheet ng or other appropr ate mater als. A conta nment system around the HVAC equ pment s generally not requ red because the nter or conf nes of the system def ne the work area. Eng neer ng controls to prevent mold spore m grat on must nclude the follow ng:

( ) Deact vat on of the HVAC system affected by the mold remed at on. Th s may requ re temporary HVAC un ts to prov de cool ng or heat ng for affected part of the fac l ty to support employee or equ pment requ red temperature parameters.

( ) Creat on ofnegat ve a r pressure w th n the work area w th negat ve a r mach nes equ pped w th HEPA f ltrat on and d scharge of the exhausted a r outdoors whenever poss ble. Negat ve a r mach nes should be or ented to draw a r toward the entrance to the work area and away from unaffected port ons ofthe bu ld ng.

(c) Use of Personal Protect ve Equ pment. PPE for HVAC mold remed at on projects must nclude, at a m n mum, the same PPE used for aNon-HVAC mold remed at on project as deta led n Sect on 4(c)(2)(c) of th s chapter.

(d) Removal ofAffected Porous Mater als. Remove mater al ntact whenever poss ble to m n m ze mold spore aerosols. Place affected mater als nto d sposal conta ners mmed ately after removal.

(e) Clean ng Non-Porous Mater als, Clean the rema n ng substrates and any other non-porous mater als us ng HEPA vacuums and a detergent n water solut on. Allow mater als to dry thoroughly.

(f) Proper Waste D sposal. Place contam nated mater als nto a rt ght conta ners at the removal s te. Pr or to seal ng the conta ners, evacuate excess a r us ng a HEPA vacuum.

HEPA vacuum or wet w pe the outs de of waste conta ners mmed ately before transport ng.

Conta ners should be d sposed of as ord nary construct on debr s fno regulated contam nants are present.

(g) B oc des. The EPA regulates the use ofb oc des n HVAC systems. B oc des must not be used n mold remed at on projects n HVAC systems or a r plenums unless spec f cally d rected by the CIH n the project des gn documentat on. The CIH must pre-approve the use of EPA-approved b oc des n a r-conveyance systems w th the FAA. The appl cat on of a b oc de must be conducted wh le the work area s under negat ve pressure. The negat ve a r mach nes must be operated unt l no detectable odors are present follow ng b oc de appl cat on.

(h) Ant -M crob al Coat ngs. The appl cat on of ant -m crob al coat ngs must not be for b oe dal purposes but rather as a prevent ve measure on porous mater als that were not removed as part of the remed at on projeet. Apply the ant -m crob al coat ngs after a thorough clean ng of the surfaee of the mater als.

( ) Conduct ng a Post-Remed at on Evaluat on. A v sual nspeet on must be eompleted to ensure all mold contam nat on has been effeet vely abated. Follow ng a suecessft l v sual nspeet on, eomplete post-remed at on sampl ng as spec f ed by the CIH. The evaluat on cr ter a are presented n Sect on 4(e) ofth s ehapter.

e. Post-Remediation Evaluation.

(1) Cr ter a for Post-Remed at on Evaluat on. Use the follow ng er ter a for post-remed at on evaluat on n staffed fac l t es;

(a) Properly address the mo sture source pr or to the nstallat on ofnew f n sh ng mater als.

(b) Ensure sat sfaetory complet on of all aspeets of the mold remed at on’s seope of work.

(e) Ensure removal of all debr s and waste generated dur ng the project.

(d) Ensure the conta ment enelosure s f ree ofv s ble mold growth and the rema n ng mater als are dry (less than 15 pereent mo sture content).

(e) Perform spore trap sampl ng for major remed at on. See Seet on 4e(2) below for deta ls.

(2) Spore Trap Sampl ng.

(a) Cr ter a for Spore Trap Sampl ng. Use the follow ng er ter a for spore-trap a r sampl ng for major mold remed at on projects:

( ) Ins de Conta nment: Colleet three samples, w th add t onal samples for larger conta nments based on the CIH recommendat on. For some ofthe smaller major mold remed at on projeets, three samples may not be necessary or feas ble. In those s tuat ons, the CIH w ll determ ne appropr ate number of conta nment and eontrol samples.

( ) Outs de the Bu ld ng Control: Collect a m n mxun ofthree samples.

( ) Ins de Bu ld ng and Outs de Conta nment Control: Colleet a m n mum of three samples ns de the bu ld ng, wh eh are at least f fty feet (50) from the eonta nment area.

( v) Aet ve A r Movement: Colleet all ns de conta nment samples wh le there s act ve a r movement ereated by one of the follow ng methods:

• Negat ve a r mach nes draw ng a r nto the conta nment and exhaust ng outs de the eonta nment.

• HEPA f ltrat on maeh nes re-e rculat ng a r n the eonta nment.

• Release Cr ter a: Major mold remed at on s eomplete when the follow ng cond t ons are met:

• Total mold spore concentrat ons of each sample collected ns de the conta nment are less than the h ghest control sample collected (outs de the conta nment or outdoors wh chever s h ghest).

• The concentrat ons of each nd v dual mold types and spec es ns de the conta nment (other than Asperg llus/Pen c ll um (ASP/PEN)) must be lower than or w th n 40 spores per cub c meter of a r (sp/m3) of the h ghest control sample collected (outs de the conta nment or outdoors, wh chever s h ghest). A d fference of 40 sp/m3 of a r (compar sons of total or nd v dual spec es) or less must be cons dered negl g ble and not be grounds for a post-remed at on evaluat on fa lure.

• The concentrat on ofASP/PEN spores ns de the conta nment area must also be lower than or w th n 40 spores/m3 the h ghest control sample. Concentrat ons of ASP/PEN ns de the conta nment ofup to 200 sp/m3 or less w ll not be grounds for clearance fa lure regardless of control concentrat ons. If the concentrat ons ofASP/PEN ns de the conta nment exceed 400 sp/m3 or greater, the clearance has fa led, regardless of control sample results.

• If these cond t ons are not met, the mold remed at on s ncomplete, and the clean ng procedures may need to be repeated. If the release cr ter a are not met, consult w th the CIH, ATO safety and health spec al st, and f necessary the ATO lAQ Techn cal Lead to determ ne any add t onal steps to be taken.

(v) Laboratory Analys s: Subm t all samples to an accred ted AIHA EMLAP…