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THE UNIVERSITY OF HONG KONGLIBRARIES<strong>Hong</strong> <strong>Kong</strong> Collection

Environmental Policy Working Grouphttp://www.pelb.gov.hk/iaq/conunent.htmI NDOOR AIRQUALITYPr<strong>of</strong>essional Bodies' Comments on Draft Consultation PackageAir Conditioning and Refrigeration Association <strong>of</strong> HConsumer Counr.il<strong>Hong</strong> <strong>Kong</strong> Council cm Smoking and Health<strong>Hong</strong> <strong>Kong</strong> Association <strong>of</strong> Certification Labor<strong>Hong</strong> <strong>Kong</strong> Institute <strong>of</strong> Architects<strong>Hong</strong> <strong>Kong</strong> Institute <strong>of</strong> Engineer (Chemical DiscLtd.<strong>Hong</strong> <strong>Kong</strong> Institute <strong>of</strong> Housing<strong>Hong</strong> <strong>Kong</strong> Institute <strong>of</strong> Occupational and Environmental H<strong>Hong</strong> <strong>Kong</strong> Institute <strong>of</strong> Surveyor<strong>Hong</strong> <strong>Kong</strong> Occupational safety and Health Association<strong>Hong</strong> <strong>Kong</strong> Productivity Council<strong>Hong</strong> <strong>Kong</strong> Polytechnic <strong>University</strong><strong>Hong</strong> <strong>Kong</strong> <strong>University</strong> <strong>of</strong> Science and Technology<strong>Hong</strong> <strong>Kong</strong>- College <strong>of</strong> Community Medicine<strong>Hong</strong> <strong>Kong</strong> Radiation Protection Society<strong>Hong</strong> <strong>Kong</strong> Thoracic Society (T,tH)Occupational Safety and Health CouncilVocational Training ConnHI

AIR mfl/TE* mTEftfiflTionfiL umiTEOUnit 1-2,1/F, Fu <strong>Hong</strong> tod 8Jdg., t Hok Yuen St. East. Hunghom, Kowiooa <strong>Hong</strong> <strong>Kong</strong>.M *tl:($52)27640307Date:Reference:Sept. 21, 1999.F990798/0921/99Envrionmental Protection Department,33/F Revenue Tower,5 Gloucester Road,<strong>Hong</strong> <strong>Kong</strong>.Attn: Dr. Alain Lam(Air Policy Group)Dear Sir,Re:Indoor Air Quality Consultation PaperWe refer to the captioned consultation paper from your department addressed to ACRA. We havereplied with our opinions through ACRA to Planning, Environment & Lands Bureau.We would like to highlight to you the following main points we suggested:1. <strong>The</strong> need for immediate legislation to speed up the process <strong>of</strong> IAQ implementation. We are talkingabout a problem which can cause death! <strong>The</strong>re is no point in waiting for 3 years to enact anordinance.2. Simplification <strong>of</strong> channel for enquiry by the public It is hardly imaginable for the public toapproach ten government departments on IAQ problems.3. For HK environment, our IAQ standard should be higher than other countries owing to itspopulation density. ASHRAE 62-89 should be taken as a minimum standard.4. Government should take the lead to implement IAQ pilot plants and also for mock up purpose.5. Laying down practical standards or guideline on key parameters.6. <strong>The</strong>re must be worked examples <strong>of</strong> solutions for renovation <strong>of</strong> existing buildings for IAQ standard.7. For any company providing IAQ services such as design, installation and servicing, they must belicensed and shall bear legal liabilities <strong>of</strong> their work and certification.8. EPD shall provide training to qualified persons working in IAQ business and in developer firms.9. Incentives must be provided to developers or property owners for implementing IAQ in the form <strong>of</strong>relaxation on Rates or tax. Also, we suggested the exclusion <strong>of</strong> plant room areas from plot ratioto give more flexibility for plant design, energy recovery etc.10. <strong>The</strong>re should be a clear identification <strong>of</strong> duties and roles <strong>of</strong> the developer, architect, designengineer and contractor and certifying bodies with respect to design, installation, servicing andcertifications.11. Duct cleaning: This is only a temporary measure and is contradictory to the requirements <strong>of</strong> IAQobjectives. Duct cleaning should only form part <strong>of</strong> the pre-treatment work for IAQ objective andshould be done only once.AIR fflft/TIft HVAC PRODUCTS

w>s^«® ma/riftMfllftinTiftflftTIOnftL LimiTiDfUnit 1-2,1/F, Fu <strong>Hong</strong> Ind. BWg.,1 Hok Yuen St. EosT, Hunghom, Kowtoon, <strong>Hong</strong> <strong>Kong</strong>. Tei.® Si 1(852)27640307Fox 11 H: (S52) 2363 7336We also have made the following suggestions on the technical aspect:A. Macro aspect::<strong>The</strong>re should be clear-cut classification <strong>of</strong> IAQ standards in the following categories:1. Scheduled premises such as restaurants, canteens, cinemas, discos, funeral parlours etc.2. Shopping arcades3. Offices4. Hospital & Clinics5. Public Utilities6. Workshops or factoriesB. Micro aspect1. <strong>The</strong> controlled area must Have i2. Intake air must be treated with high efficiency fitters and through central PAU.3. Filter efficiency must be over 93% with auto-cleaning feature to avoid human factor mistakes.4. Filters must be <strong>of</strong> long-life design (say over 1000 days) with permanent mounting to eliminate filterby-passing problems.We believe to physically implement good IAQ, we need a proper tool: a new air-conditioning systemwhich should be <strong>of</strong> a completely new design aiming at IAQ standard. If conventional systems arestill used, we can never produce the effect we want.We must stress that legislation Is inevitable. However, we are not pushing developers to spendmoney to attain IAQ objectives. We convince them by the returns they will get in terms <strong>of</strong> savings inenergy and manpower, increase in productivity and increase in customers etc. Of course, our goalis for Health.As an international city, we should take Health as our top priority. We are already late in IAQimplementation. Without immediate legislation, we see nobody will take action. Two years later, wewill see the same sick buildings and nothing will happen. EPD will still be pushing IAQ issue, butonly becoming a clich6. Is this the scenerio we want to see?Yoursfaiilifutty, ~ :r .........For AIR MASTER INTERNATIONAL LTD.ffy Winston Y.S. CHEUNGManaging DirectorCc Mr. Charles Wu (Environmental Protection Officer, IAQ)uc*oo*Ho:M07i C<strong>of</strong>tlflcat* No FM 33887HVAC PRODUCTS

10-SEP-1999 17:09 COMMUNITY MEDICINE* <strong>HKU</strong>I ««*«•*ft*MO K0lp« COUNCIL OM SMOKING JUIP If IAUN*• 852 2855 9528 P.01•To r :: Dr Alain Lam, Air Policy Group, EDP: '< ':• (Fax: 2827 8040)cc !• ; ; MrGL^ungJP(Acti^: Dr M Chan, JP (Director <strong>of</strong> Health) (Far 21360071)Kroii;: AJHedleyDate :: 10 September 1999Consultation OP door Air Quali;.: • . :> Hfe Guidelines derived front the Grovermnfffit's Cops• •• on Tff door Air PoOurion in Offices A Public Places 199S : *Tfaaxjk you for your letter <strong>of</strong> 3 August 1999 and the invitation to comment on the tfraft"Gukknce Notes for the Management <strong>of</strong> Indoor Air Quality in Offices and PublicPlaces" August 1999. . -on Smoking and Hetlth appreciates the opportunity to do this from .theviewpoint <strong>of</strong> the need to prevent passive smoking in the general population. .consultation document was discussed at the Council Meeting on 9 September.I regret to have to.state hcsre that, in its present form, the section in the draft guidelines(4.1:1 page 53), on the prevention <strong>of</strong> passive smoking, is totally unacceptable. It Msfar slfcort <strong>of</strong> the type <strong>of</strong> document which is needed to underpin the present and futureprotection <strong>of</strong> indoor air from contamination by second band smoke..1 i111* Councils' position<strong>The</strong>; Cpyndl cannot support the current draft in hi present form but will readily <strong>of</strong>fer;to wxrk with the Environmental Protection Department to develop a state-<strong>of</strong>-the-art .rbbu$ '' statement on the hazards <strong>of</strong> passive smoking and the measures needed to avoid.Defideadet in the draft guideUnef. ,.», • ^ . < . **theidefidcncies in the present statement can be briefly summarised as follows:* . *-' <strong>The</strong> statements on the hazards associated with exposure to second hand smote.:.and resultant passive smoking are very badly worded and as a reiult ar£ambiguous, confusing, incomplete and likely to mislead if they are adopted asguidelines for policy and implementation. We are prepared to provide adetailed critique.statement on steps required to provide protection fromsmoke contain some <strong>of</strong> the elements needed for an effectivei (ASZ) ZASA. AAiT Z&tMPACSIMItit16:58 + 852 2855 9526 39* B1

10-SEP-1999 IV s 09 COMMUNITY MEDICINE* <strong>HKU</strong> + 852 2855 952B P. 02» it is clear from this document that <strong>Hong</strong> <strong>Kong</strong> requires a ;up to date and independent review 1 <strong>of</strong> the hazard <strong>of</strong> passive!/'smoking and its prevention.-ll^-ij^jor :adults in the home, pregnant women, thewgent need to ban smoking in theworkplace leisure and shopping, centres and eating places, including the :'protection <strong>of</strong> all workers in the catering and hospitality industry,: : <strong>The</strong>.rappxt which you have translated into guidelines is also very dated and ;:4'penat reflect the full spectrum <strong>of</strong> health risks which are now fullyin the world's literature. A provisional list <strong>of</strong> sources <strong>of</strong>inform&tipn on the issues <strong>of</strong> second hand smoke, passive smoking and its•:I&ev!efltlon is appended.in <strong>Hong</strong> <strong>Kong</strong>lip Cioiiricil on Smoking and Health maintain? regular monitoring <strong>of</strong>: '«; ;^id)tmiological and toxicological studies, reviews .and other reports on secbnd-. '*;hand s&toke, '•I ';tj»e eatiinates <strong>of</strong> injury to the health <strong>of</strong> both non-smokers and smokers,•; : legislation worldwide on prevention <strong>of</strong> passive smoking and ;+: evaluations <strong>of</strong> the implementation <strong>of</strong> no-smoking policies, including the obstaclestip achieving effective legislation and its implementation, and how these barriers: ,. myl be overcome, '.• i . . *tbf need for validity and independence :'"-'' *'• 'confidence in the present statement in the draft guidelines becausefifcrst, we believ* it is incomplete and incompetent in scientific terms. Second, webelieve that the team <strong>of</strong> contractors which undertook the original studies qnd Wrote^consultant's report had a long history <strong>of</strong> close association with the tobaccoIndustry, This is not an acceptable basis on which to formulate independentguidelines for long term policy on the prevention <strong>of</strong> passive smoking.'forward * ]"•*.; »• * . , .thfere it considerable expertise in <strong>Hong</strong> <strong>Kong</strong> on the epidemiological and publitnealtti .dimensions <strong>of</strong> passive smoking. This expertise is recognised worldwide^^pliyp, iti r^ipnal and global strategies for the prevention <strong>of</strong> tobacco related disease^through the Western Pacific Regional Office <strong>of</strong> the World Health Organization and •the ; Asia Pacific Association for Tobacco Control.• • . * * « • • :&tou% |tom several expert sources is avafliMe to the <strong>Hong</strong> Kcmg Government,topughthe Environmental Protection Department, on the formulation <strong>of</strong> new, :i^eritifit«Uy founded public health measurei to promote a imoke-free indoor airpolicy in the SAR.+ 852 2855 S62S 99%

10-SEP-19B9 1?:10:, *»;«,»».««* ACOMMUNITY MEDICINE* <strong>HKU</strong> * 852 2955 9528 P.03K; is'widely Recognised throughout the world that vohnttary codes have felled to'. protect public places and workplaces from the hazard <strong>of</strong> passive <strong>Hong</strong>.<strong>Kong</strong>'s present legislation on many aspects <strong>of</strong> indoor air quality ii either weak or mm*existent <strong>The</strong> : aection which attempts to address this in the draft guidelines is likely tohave no beneficial impact on the present situation.1$* present statement should be discarded and an entirely fresh approach takca to thedevelopment <strong>of</strong> guidelines, together with supporting documents and other references,which will meet <strong>Hong</strong> <strong>Kong</strong>'s needs for indoor air which is free from tobacco smoke.AJHedkyJP\0310-SEP~i999"'' llfiS'se +85228559528 99?t

10-SEP-1939 17:10 COMMUNITY MEDICINE. <strong>HKU</strong> +852 2855 9528 P.B4«•*.*;•*.*,«««.«<strong>The</strong> reaources available to support the devdopment <strong>of</strong> guiddf<strong>of</strong>tf indud*'*• US, American'! for Non-smokers Rights Organisation: Smoking. end Ventilation47W&MJ& md Safety Ewoutive: UKApprwtdCod* qf Practice (ACOP) My 29j;' how the healtib and safety law should apply to* US^kan^ndc^r A^I^gulatiomi Asthma Campaign: Smddng in the workplace^VK^^^m^ni: Scientific Committee on Tobacco and Health (SCOTS)V*~ ^13^^; * [r'i. !i.. *•"•.'»'{Ha&k Cellular <strong>The</strong> Cost <strong>of</strong> Smoking in the Workplace^ t^C Gdvcmmcnt: Healthy Workplace Initiative ,* US : Centre for Disease Control; Making your workplace mokejree» " . • . * . *>:EUropeanHealth and Safety: Workplace Health and Safety Directive 89/654 EEC'?. -fiio^eanlfcalth and Safety: Pregnant Workers Directive 92/85/EECvUKSfealth and Safety Executive: Guide to Passive Smoking in the Workplace:*..*• i; * , •' UK; Department <strong>of</strong> Health: Smoking in Residential Care Establishments .* A$HRAB statement on the exclusion <strong>of</strong> smoking in indoor areas: a reversal <strong>of</strong> .' • • • " ' " 1999 . : . ..> WHQ Air Quality Guidelines fbr Europe; 2 nd Edition: Environmental TobaccoSmokeTOTA. P.'04"10-SEP-1999 IS'Sa +95228559529 99* P.B4

IrtenongCertification Laboratories Ltd.C.M.A. Suiting 1/R, S4-66 Corsasughf Roid (taml <strong>Hong</strong> <strong>Kong</strong>Tlx- 63S26 MAFTS HX Tel: Pa*s 2S41 4541Ogrft<strong>of</strong>: ADM/3/3 YourRef.:Planning, Environment & Lands BureauEnvironment Division9/F Murray BuildingGarden RoadCentral<strong>Hong</strong> <strong>Kong</strong>Dear Sir/Madam,nf "Menajnnv1999 September 9Thank you for your letter <strong>of</strong> August 3 inviting comments from dieAssociation <strong>of</strong> the captioned.Attached please find our comments for your reference and consideration.We would appreciate if you could send us updated information on. thedevelopment <strong>of</strong> the issue in due course. Should you have any queries, pleasefeel free to contact me at tel no. 2542 8618 or Mr Fergus Au at te] no. 2542 8620.Yours sincerely,Natalie Keungfor Secretaries

09-SEP-1999 10s 38 FROM TO 28278040 P. 02/02"* * m.<strong>The</strong> <strong>Hong</strong> <strong>Kong</strong> Association <strong>of</strong> Certification Laboratories Lid.Comments m EFD's Coasuhation Paper on "Managing fadoor Air Quality 81 aad"Guidance Notts for the Mraagemtnr <strong>of</strong> fiadoer Air Qualify in Office* and Publk Places"1. We welcome and applaud the Government to take lead in m quality fl&Q)problems in <strong>of</strong>fices and public places. <strong>The</strong> Issue has been gaining public inrecent years and appropriate action has to be done property and quickly.2. We also agree to the broad approach to tackle the IAQ issues thwugh ^ob&ntary selfregulationapproach combined with a certification system to declare the level <strong>of</strong>compliance to the IAQ objectives.3. While we appreciate the need to set different levels <strong>of</strong> IAQ objectives in order toencourage participation by property owners to improve their buildings IAQ, we havestrong reservation to set the proposed Level 3 IAQ objectives at the OccupationalExposure Limits (OELs). As pointed out in Section 3,1 <strong>of</strong> the Guidance Notes for theManagement <strong>of</strong> Indoor Air Quality in Offices and Public Places (page 21), IAQ objectivesare intended to protect a more diverse target population which may include children, theaged and infirm, and people with chemical sensitivity. In our views, the proposed Level3 IAQ objectives ftil to <strong>of</strong>fer such protection to building occupants. It should be notedthat the Occupational Safety & Health Ordinance (OSHO) already requires fiillcompliance with the OELs and so it seems inappropriate to set IAQ objectives at OELs inthis voluntary regulatory system <strong>of</strong> IAQ management. Moreover, when such Level 3objectives are set for the public, it would misdirect the public to aim at this level <strong>of</strong>objectives and be satisfied with such level though it is suggested in the Guidance Note toencourage achievement <strong>of</strong> at least Level 2 objectives (page 24), In $rA*r to M* «* pM^ir. t

20 September! 999<strong>The</strong> <strong>Hong</strong> <strong>Kong</strong> Institute <strong>of</strong>Planning, Environment & Lands BureauEnvironment Division9/F Murray BuildingGarden RoadCentral <strong>Hong</strong> <strong>Kong</strong>your ref: EP2UL3/29 VIIAttn: D? Alain LamDear Dr LamCONSULTATION ON MANAGING INDOOR AIR QUALITYWe rafaf to your letter dated 3 August 1999 inviting our comments on your "ConsultationPaper on Managing Indoor Air Quality" and dran "Guidance Notes forth* Managing <strong>of</strong>Indoor Air Quality in Offices and Public Places". While expressing our support to thepromoteon the<strong>of</strong> healthy built environment in <strong>Hong</strong> <strong>Kong</strong>, we have the following commentssultatlon paper as well as the draft guidance notes: '•Coneutta Ion Paper on "Managing Indoor Air Quality"lAO 1 ifnrmAtirtrt C*ntMi foara 3QVJ3affionstraKf!fl snvif<strong>of</strong>tmentaliv fcsflflfisihlfiWhtsho<strong>of</strong> osupporting tha setting up <strong>of</strong> an IAQ information, we envisage that the Centred include documentation <strong>of</strong> good local practice on designing healthier indoormment for various building types (in addition to the information on the practiceer countries).We so envision that the Centre itself is potentially an Innovative and excitingdem nstration project ~ showing excellent indoor environmental quality throughvario j$ effective architectural and E&M design strategies on IAQ management Atthe ame time, the Centre is anticipated to address other environmental concernsuch as energy efficiency and resource conservation from a holistic perspective <strong>of</strong>susts nable design,<strong>The</strong> esign <strong>of</strong> the Centre can be stimulated through idea competition, which canforth promote the IAQ awareness among the building pr<strong>of</strong>essionals.CaQVJft !nad /naCflmmltfyiant findWe ppredatr that the Government is preparing to take the lead in assessing theIAQ 9f all government buildings. Wa urge that the government commitment shouldbe odended to include the. government-subsidized projects such as universitycam us buildings.To ffrnty demonstrate the commitment, the IAQ objectives should be also targetedato ipHance with at least the Level 2 (and preferably the Level 1 for new endrenc ition projects).At h ast for the new and renovation projects, we strongly encourage the start <strong>of</strong>Implementing the IAQ Objectives by the Government without dday, and not laterthan .he Second Phase (2000J.\J^**ti**^5>ti»llf?* till lilt KTfi:isiiesas rai:Hffa<strong>of</strong>i,lHf33M+652 2234 9106 99X p.ai

23-SEP-1999 19-'07 FROM Tn ^TO 8040 P. 02/03Tfw <strong>Hong</strong> <strong>Kong</strong><strong>of</strong>"Guidance Note for the Managing <strong>of</strong> Indoor Air Quality In Offices & Public Pieces"<strong>The</strong> current scheme only cover* <strong>of</strong>fices and pubiie pltcaa that are aneioaad araasprovided with MVAC for human comfort but e&ecluding buildings far domestic use,car parking and public transport interchange, etc. Tha following two aspects shouldba clarified in tha Quldanca Notts:Tha environmental merit* <strong>of</strong> naturally ventilated buildings should barecognized from an IAQ perspective. Whenever tna contact and tha fanctionallow, we should conaldar designing naturally vantiiatad tradings at tha atart(with supplemental support <strong>of</strong> MVAC systam tor optional uaa only If necessary),Totally saaiad buildings with haavy dependence on MVAC systems unlikelyrepresent the way forward towards sustainable developmentTha action plan extending tha consultancy study on JAQ management Inothor major building typaa; such §s tha domestic and tha partially endoatdpublic places (such as public transport interchanges)[qdqor Air Qmiflfy f)ht^^f r\/ /|>aelkifi IV Pawidwinq h•, tit^f KtfijlavijrimOgenym******* 0.1 *i« **Ti

23-SEP-1999 19s 07 FROMTO 28278040P.03/03Th® <strong>Hong</strong> <strong>Kong</strong> Institute <strong>of</strong>Two (2) distinct sub-sections ahould be provided to distinguish between thespecinoatien <strong>of</strong> building material* and the aspects <strong>of</strong> <strong>of</strong>fice maahlneiy selection.In the 2nd paragraph, Vood" b mentioned, <strong>The</strong>re is a wide range <strong>of</strong> natumi,untreated wood products wnn different emission characteristics, tome discussionson this aspect are recommended, rather than fostering an oversimplifiedimpression that natural materials generally have no or negligible emissions. On theother hand, commonly used finishing material such as carpet and paints should beIncluded as emmples where appropriate,On the choice <strong>of</strong> materials, the dran ON merely recommends building pr<strong>of</strong>essionalsthemselves to cany out research and test on products, Howtw, with a view toeffectively promoting batter (AQ, the Govammant should take the lead In developinglocal database <strong>of</strong> building materials with emission classification so thatpr<strong>of</strong>essional*, developers, building managers, and.even the publlo can more raadilymake appropriate choice <strong>of</strong> haetthy matarials,<strong>The</strong> classification <strong>of</strong> materials and products, a worthwhile process as recognized byother countries as part <strong>of</strong> the healthy building labeling schema to generate incentive,certainly takes time and effort for a committee or the like to develop thaclassification. Tha committee members should Include representatives <strong>of</strong>researchers and various construction parties. <strong>The</strong> HKIA is willing to support thistask towards a betterment <strong>of</strong> indoor environmental quality in <strong>Hong</strong> <strong>Kong</strong>.Yours sincerelyRita Cheung (MSfRAftktMf ^Registrarc.c.BLA ChairmanAM«iiMrilT>NilfWiiaBart|tUal^lim ^loor. on« Hysan Avtnut.; Mr Tung 0>*t M** CNif juirMPt. Htag KJ^BmmirM^ ^fCAA^ifftf AfCMIiCtl IM^ONrfTil.'IS18:50 •^852 2234 9136TOTAL P.03

02-SEP-1999 10531 FROM TO 28275040 P.10/12fi* (852) 2S9S -4446 ^ * (852)25777791******THIINSTITtfTION OF90 WDndC«Mft Hot Great Gwga Stoat Causeway ioy MKT« 016212891 4M4 Fax (852) 2577 77*1Dlr®ct<strong>of</strong> a«n*raSPtMechS fCliSg RrtrtR RMgt REAmt PASHRAC31 August 1999Plaimiogp Environment & Lands BtutsauEnvironment Division9/FMunayBtdldingGarden RoadCentral<strong>Hong</strong>KotigAttn: Dr Alain LamEnviionmoitalDear Siron Managing Indoor Air QualityThank you for your letter <strong>of</strong> 3 August 1999 inviting the H&E to comment on theabove captioned paper. Our comments are set out in the attachment for yourconsideration*Thank you for your attention,Yours faithfidiyIrPKKwokSecretaryGeneralEnccc: Ir Dr Gordon McKay, Chainnan, Chemical DisciplineFMORARYVWIKKICftWILLMONNiaMllO.DOCft02-SEP-1999 10:02 * ff+85223141721 P.18

02-SEP-1999 10J31 FROM TO 28278040 P. 11/12;HONG KONG INSTITUTION Of ENGINEERS* ******W '"'' ' ' ' . ' . • " ' • .. , - , .Articles missing into sentence.Indoor air pollutant* - ozone, solveais, pe^cides/fimgicides» plastic* additivesP A, section 14: "...an omnibus ImifUckkR..." (?)p.6, section 25, Selfrregukrion: "...are required to employ suitably qualified personnel tothe indoor- if ffs a, self-ftgulation a^^- who dctannines what a suitabLs qualification is?p .7, section 26: "...combined ^ith a certification ay^tem-..".-who is permitted to issue the certificates and on what basis * i.e. how is-an assessort;stanaard <strong>of</strong> workevaluated?Table 2: are fungal spores and Icgionella combined with bacteria and/or RSP? Should TSP be included onthe bajds <strong>of</strong> eye/ikin initadon?Whit about Chlorine, C102 from ihddor swimming pools?Goidaact N««» on Management af Indoor Air Quality1 . Introduction ' • . ' ,. . " . . , _ • .•,-.-• -.•..- '• . '•• . : •• •••' ":.- .-'p. 1, section 1^ * Deftoinona: I suspect that indoor swimming pools may need special consideration. .2. Background • - . : • " . • • . ' ' •• ' "•'• "'. .•""""'"• .p,13, ty liiotiB definition i*e VQCs "dxetoiodly unstable"?- hasn't CCM been banned from use in HK? . . . . ,. repeat df ccart/y tto same infonnation three times for xylenct (eon4ensis the tlueetotoone : li xylen« 11 )- possibly missini stymie, plartcisers, fire retardents, alcohOls/etfacdt/amaiies/est«^ (solvcats),hydrocarboas (ipray.caiis), ammonia (bleach?), aldehydes/organic acids- 1 suggest you consider adding:l)'Methyl-cthyl-keioxie (M£K) as it is a coimnbn adhesive /paint splvem ;.2) Trichloroethane or Dfchlotoinethanc (methylene chloride) whifihever iftiatd wort extensively in <strong>Hong</strong><strong>Kong</strong>3) Polybrominated diphenyl ethers - fire retardants (see reference below)p. 17: He-write the first paragraph on Radon.p.18: Body odora - not only deodorants but also peflfai^miyha^At the bottom^f die page the section on bacteria gets a bit technical,p.20, top: "^viiusei do not survive long in MVAC systems.-. 1 ' - basis?Other Air Conttminants:Cooking in high twnperature oil may produce cairnnogenic pyrcncs as well as noxious /nuisance odouza.Smoke from incense burning,..?p.21 , section 3.1, second parigraph: does this imply that all schools should be aiming for Level 1 IAQ..... ' •p.22, top: are icre many occupational hygene pr<strong>of</strong>essionals mH^<strong>The</strong> datp in Tables 3-2 and 3-3 need to be checked against similar overseas IAQ limits, .p.27, section 3,4 - Assessment Methods: perhaps a typical complete example could he provided in anappendix (number <strong>of</strong> saroplei, number <strong>of</strong> repeats, intervals between repeats, Ukely statisticalsignificance,*.,)p.30-31: GC for TVOO - surely, in order to use a GC* the user needs to know how many and what VOCsarc present m order to be able to calibrate &e GC (even if it is for TVOC*) - but I would noed to lookupthe * details ' " <strong>of</strong> the method ' to confirm ^nfirrn this. <strong>The</strong> last two sencetjcea should cither be ren^something like "OC/MS can provide qualitative identification wpr5vided by GC/Fffi 41 - the reference to the approved method is (as long as the method k readilyavailable in <strong>Hong</strong> <strong>Kong</strong>).10:02 > 652 2314 1721 / P.19

02-S6P-1999 10532 FROM T0 28278040 P. 12/12p32;saetion 3,4X7: is NO.a-probtemisWefl'asN02?p34: Is radon readily ad*brb*d by activated carbon?p.40, section 4,233:1 do not thrak that che last sentence adds any useful information. Source?section 4.23.4, Ga* Filters: does activated carbon actually catalyse die conventon <strong>of</strong> ozone to oxygen andthe conversion <strong>of</strong> hydrogen sulfur (sic) co sulfur (sic) at ft reasonable speed at room temperature? Source?p.*?, Table 7.2:^Congestion..,": If many occupants Ire aftected, it may be an irrational response.While this *z£&y* be correct .in some instances, it is Contentious. 1 would suggest th&t the "iccationalresponse" hypothesis should only be Investigated after a proper assessment has drawn a blankp.69, top: surely sn anemometer would pro vide a better method for measuring the ftir flow rats than a tracergas (possibility <strong>of</strong> more IAQ GompUin^ if possible pollutants are introduced for testing purposes..?)p.79, sscticn - Authorised Analyst: an up-to-ditc assessment <strong>of</strong> the qualification may be necessarysection 9.13«2 t

.**SEP 22 '39 ll:20RM THE HKIE 4852 2577 7791P.1/10TUTlONOFENdNEKS() in BK1/L3/29 VH22 September 1999(FaxNo:2827S040)i EciviroBincnt A Lands BureauDivision9/F Murray BuildingGarden Road, Central(AttarDr Alain LamAg. Principal Environmental Protectioii Officer)Dear SirConsultation Paper on Managing Indoor Air QualityWe refer to our previous letter <strong>of</strong> 31 August 1999 regarding the above consultationWe have received further comment* fiom our Building Services Division,Environmental and Mechanical Disciplines on the above document «*irt would IjVp t<strong>of</strong>orward to you for your «jxmderation. <strong>The</strong> comments are set out in the enclosedYours fkithfoUyBBCccIT Dr Gordon McKayx**2S-SEP-1999 11* +852-2577 7791 P. 01

THE -;HfCIE :^-H352 2577 '7791iBMHH^^•A. Gt&eni CwL<strong>The</strong> Building Serviowt Divisim <strong>of</strong> He HKJB fidly npports ibe gmmimieQt'spoHcy to imi»ove IAQ for the beaMi <strong>of</strong> tbe publie wi& the accaMisnioiHowever, we should aware that we should not atbw easy r^guMoM to exercisover-stringent control <strong>of</strong> IAQ with the result <strong>of</strong> higher building ©smstoisdonand mstntenance costs to the detriment <strong>of</strong> HKSAR ability to compete.2. Above all ether comments made in Ais paper in tbe seme <strong>of</strong> imposttanoe, the.major drawback andfawdwDpiacy<strong>of</strong> the Coniultaticm Psspct and Ou^aocse Notesare reflected by their failure to address tbe preventive policy, measures andexecution procedures. It is agreed by everybody tfcatpr^^than remedy. Anticipating the proMcms and avoiding them ftom occurrencein the fiHure by aSL m«ms axe tbe responsibilities <strong>of</strong> every citioen, and fix Hiepr<strong>of</strong>essionals, their added responsibdlities and e

fiEP:22"*99-; ll*ElflM THE HK2E *852 2577 7791 '• . ' P,3/10system designs and drawings relevant to IAQ shoxild be ««ifiBd by the RPE' id jiobBrftted tt Btifi^^6. <strong>The</strong> qualified bmMiBg services nd modtumictl eao^M^s areeducated and trained by pmctiamg az&d ^coatfewtB pit<strong>of</strong>tsaiosialto provide quality indoor air eixvizoismast acceptable torecognised standaids - e.g. ASHRAE Staodatds 62-89, by appropriate designs<strong>of</strong> MVAC systems and the stringent supervision <strong>of</strong> the .Installation aad testingaad comniisjdo&iag <strong>of</strong> these systems, lite quality indoor air egvironnafiat caa>only te acbicvad ty tii^ comprahmahm md gmt^hlfe upeerf^repair <strong>of</strong> the MVAC installaticma, provided they are undertaken, administeredand ccsrtified by the Registered Pro&wooal^WesuggesttheMVAC system for each buMxig be inspected an^and the certificate submitted to BD orEPD,&Technical Comvusat o& Consnitetiion Faper1. Indoor Air Quality ClassesTable 2 6f the Pq?« suggests 3 diJ3fCTcntclas^ <strong>The</strong> objectives listedunder Class 1 are very stringent and should not be incremented at this earlystage, pending acc^^<strong>of</strong> implications, eto. Instead <strong>of</strong> treating ^ nx^ stringClass 1, 4csc objectivos should be treated as long tenns targets whic^subject to periodic review. .<strong>The</strong> presem proposed Class 2 objectives^Similariy,the present Class objectives should be renamed Class 2. This arrangementwould attract better acceptance by the industry and would provide betterincentive. No <strong>of</strong>fice owner would like to spend money to be certified to be1 IAQ parameters to be measured for certification^^I^^a. Ozone -ru>t normally a proUem.b. Fonnaldehyde - aftmction<strong>of</strong> the tenants' decoraticm/faraishing, not thebascbuildiog.c. TVOC -not commonly a pro Wcm if CO2 &RSP figures are OK with goodventilation.t^lfflfl1' " . . . - . . ' • »3. <strong>The</strong> qudity <strong>of</strong> outdoor air taken into a bmldinf after treatment by the MVACsystem or Ito supply »r distributed to each part <strong>of</strong> fl» boildhag thould be''P.B3

*s5EF22 *99 UsaSfiM THE HKXE*8S2 2577 7791 P. 4/184&w rfbeieotfti^€X Co&iiBeiats1.<strong>The</strong> ON shodd co^^ mKkrgrox^ or midti-storey imparks, restauianti andft tbooiM abo ^pply tolight industry buildings and <strong>of</strong>ficc/indtaitxy conatposrite buildings wbexc <strong>of</strong>ficeworks and light industry operatic are carried out2. Table 3.2Level 1 <strong>of</strong> tto itcommo^cd indoor air quality should be applied, after the 3years trial period, to the buildings or parts <strong>of</strong> buildings Were the occupantshave veary long aad&ignific^3. For <strong>of</strong>fices and commercia! public places, adequate outdoor air flow rates andeffective air cleaning/filtration will definitely enhance the IAQ objectives.Attention should be focused on the detection <strong>of</strong> COX KSPt room teacopttature,and outdoor air quality aftw treatment4. For buildings without central MVAC^^the requirement <strong>of</strong> providing minimum and traded outdoor air quantifies shouldbe specified for fufcrol5. BD or EFD should formulate a policy to require the buildings now insutenissicm and approval stage to meet tbe IAQ objectivefi with an agreeableeffective date,6. Codes <strong>of</strong> practice and practice notes should be issued to the consultants,contractors, RPE 1 s and architects to include IAQ detection systems into thebuilding managfiinent ^rstems or maintenance mmagement systenas should Hiebuildings have cither <strong>of</strong> them. Minimum but adequate detection parametersand points ahould cmly be provided to avoid inramiifag 1fae building cost cutmaintenance e^to our ability to cooq>cte withoverseas economies.

tvSP.2 '99' ll-ESftM 1HE*KXE +652 25777791 • P.5/10••;•-.

22 '99 ll'SaflM THEWKIE +952 2577 7791 . P.6X10''deliver a paliciilar JAQoialdoor.B- < "Gnidaace Notes for tihe MMm^mmt^flMm^ Air QuaB^r in Oflfeaand PiftLLIGeneral<strong>The</strong> Giaidahce Note (GN) provides a veiy thottg^^procedure for practical Indoor Air quality (IAQ) level itqaxraDtiot Usatrecommended by Bnvirtasmmtal Protwtion Dqmtment (EPD). <strong>The</strong> entiredocouient also coirioins tiie technical and adininurtntive conxpittxiQr in IAQ2. Specific2-1 Section 2 (Background)This section provides a very detail category for various contaminate that existsin indoor environment It is suggested to include the relationship <strong>of</strong> eachcontaminate with other relevant parameters, say evaporation rate due tochange <strong>of</strong> air flow, temperature, other effects due to change <strong>of</strong> relativehumidity etc.2.2 Sections (lodoor Air Quality Objectives)This section clearly stated the desired IAQ requirement 4at sets out by EPD.To encourage the build^ owners to evaluate and assess ind^is preferable to quote practical and existing ryamplrs in HK. In addition tothe above, the achievable <strong>of</strong> these IAQ objectives are depend on the outdoorair quality, which is unlikely to be complied for certain area in the presentoutdoor environmoit It is also suggested EPD to consider other subjectiveassessment method, say the subject624989.23 Technical Aspect2.3.1 Table 3-2 <strong>of</strong> recommended IAQ objei^ivefl does not specify the averaging time.Itshc^bdlH^defined in HKAQO. It should be noted th^very moch dijBfen»t --ia^^ySffAC system will nonnally be gwitdbcd <strong>of</strong>fmjittiQM2.3.2 Some<strong>of</strong>^poINiatotedbnologic^y undetectablc for p^'"•': ''' too short ' . " :..• . '. ; v ../. " •:•' ' v '•: "'. •: '.2577 7791


v -SEP 22 '39THE. HKIE-*B5B 2577. 7W1.'P.8/1023I^pelOToei^^, >-(b«ei*)^IniiMfeffi^^<strong>of</strong> vkw, if the benefit eamot outweigh the costfor m IAQ aasessmest (the fee %fl be iaflie order <strong>of</strong> tens <strong>of</strong> thousand fer theMl IAQ somyX ^ pogtamme eflfec^vttm seems to be questionable.<strong>The</strong> IAQ maasgem&at Gtoup doold ccattMer to wndict a cost-ad«bemfitanalysis fw tfae evafessiioii <strong>of</strong> ^oesaisws to :2.9*2 <strong>The</strong> higher the IAQ class die <strong>of</strong>fice acMeves, ttse Mgha the cost <strong>of</strong>m*$ «tw«iK^ ^r^ fttftnitoigg will he. Not difficult to seali^ tot fee cost willbe shifted to the rental fee to tenants. <strong>The</strong> high rmttl cost woidd beprohibitive t0 KWW small «» Qettmf an IAQ certificate may not beii^a

^ 22 *99 li:2SflM THE HOE «S52 25777791'fiiT.. . ,.,«, „..• • ' , • • . ' • ' ! *>•* ?.;• . .. '.. such as indoor air quality. Forinstaoce, it would be rather meanicgle^ if a large amount <strong>of</strong> natural resourceshas to be consumed to achieve the reconraended IAQ objectives set out intable 2 <strong>of</strong> the consultation p^Hat Other &ctcn such as energy ccaisirmption,waste fflimjiyff iffatiffli « . . w/ shcnild riiy 1 be tttkro ^^o ooosiderxtion forperformance.a consultant in <strong>Hong</strong> Koog h^g already formulated asimilar guidance (namely, the <strong>Hong</strong> <strong>Kong</strong> Building EnvirornnerxtalAssesament Method (HK-BEAM) to designers, owners and operators forbuildings practices wfaicbthe adverse effect on the global andlocal environments while promoting a healthy indoor environment It wouldappear to be more effective if some collaboration can be established with theHK-BEAM in formtdating an integrated standard for the eovironmentalB, Consuteataoii Paper en "Mamaging Indoor Air Qnafity"1. Page l,Souit^ <strong>of</strong> Indcw Air PollutionOne <strong>of</strong> ^the sources teadBngtoj^<strong>The</strong>refore, indoor air quaEty measurement should not be canied out for*w^fjjflg cm^plf^?« ^fti W? objectives whcai fte Air pollution indexexceeds 100.1 Pagel2 l Table2 '<strong>The</strong> units <strong>of</strong> someparametwAs the conversionfectors fix«oa the unit <strong>of</strong> ppb to ugto 1 for differaot pollutanta depend ondifferent meastmngttoriM)Wthat these p48522S?7 7791 - • P.09

VvSEF22 '99 ll:26flM THE HKIE 4652 2577 TTSlP.10/10; : . v • • • ' " • . . • ' • . '.'•.. • ' . • . 'V::^S^£S 'fT%J*T '"ft.'/!' • • . ' V ••'.""•''' • ' ' " • ' • • - . • ' '• ' ^^•vn^^l>'T? ! 'H^1'^^oH- ', • ... ..':- : .-v.;. •... . •*i vih^j^*^^^^/' 1 ^i M v; ' . . . ""•»':•-. """*' ' '' •-••*" : '••';• ^^r'•^•••• % '--- • •...;:.-. v ; • •._•---;s- ;>•v, ki *,^# v.^^v^^^%^ r,.^, . , ....• • . \-M;^.Tf^:^J v:.;^^^^^ ;; : .-:?^iO '..''TJrJ : '-*h • : ' •'"; • . ' ' ' • ' ' . • ' • • .€TritoM»N^w(GN>fer»«MC«»«^; «i*i^ i^i;* '^v'*-~- ; - ;*• "'.'y*''^'."• •-:'<strong>of</strong> the Imildmg at a itter stage iratM isx& Tot applicabk to the <strong>of</strong>fices issideijcidbistn^J» slso instdkd wifePlease refer to our oommeatlniiectkmB,ptE«.2above.'22-SEP-1999 •••11^6 ; ' - 1 ,-*0S2;;257?' ; -7?9i- P.

THE HONG KONG INSTITUTE OF HOUSINGG. P. O. Box 9735, <strong>Hong</strong> <strong>Kong</strong>21* September 1999Planning, Environment & Lands BureauEnvironment Division9/F Murray BuildingGarden Road<strong>Hong</strong> <strong>Kong</strong>Dear SirsConsultation on MiThank you for your letter <strong>of</strong> 3 August inviting our comments on the aboveConsultation Paper.We are in support <strong>of</strong> Government's intention and detennination to improve indoor airquality in buildings. However, we have some reservations that Government shouldleave the responsibility <strong>of</strong> managing indoor air quality; particularly the control andmitigation process, to building owners and property managers. We consider thatthere should be an Authority to oversee the enforcement and control issues pertainingto the management <strong>of</strong> indoor air quality and address disputes and complaints as wellOverall indoor air quality management strategy should be comprehensive but weanticipate difficulties in implementation particularly concerning complaintinvestigation and mitigation measures. As given in paragraph 8.6 <strong>of</strong> the GuidanceNotes, the level <strong>of</strong> complaints may be affected by subjective judgements. <strong>The</strong>refore,the level <strong>of</strong> effective mitigation is also subject to individual satisfaction. In thisrespect, property managers can only rely on the Authority to evaluate theeffectiveness <strong>of</strong> mitigation measures.Please do not hesitate to contact our Mr K L Wong (Tel: 2839 7888) or Mr C H Fan(Tel: 2579 8214), the Chairmen <strong>of</strong> the Pr<strong>of</strong>essional Practice Committees <strong>of</strong> CharteredInstitute <strong>of</strong> Housing (HK Branch) & <strong>Hong</strong> <strong>Kong</strong> Institute <strong>of</strong> Housing if you requireany further clarification on the views from the two Institutes.Yours sincerely,HONG KONG INSTITUTE OF HOUSINGAlbert SoPresidentC:\HXmEPD.docTOTflL P.0128-SEP-1999 09:42 +85222349106 P- 01

<strong>Hong</strong> <strong>Kong</strong> Institute <strong>of</strong> Occupational and Environmental HygieneA member <strong>of</strong>fotcmatidflai QtcuptiStMiai KygiPlanning, Environment and Lands Bureau,Environment Division,9/R, Murray Building.Garden Road,Centra), <strong>Hong</strong> <strong>Kong</strong>.Fax; 2234 910610 September 1999Dear Sirs,Consultation on Managing Indoor Air QualityThank you very much for inviting the <strong>Hong</strong> <strong>Kong</strong> Institute <strong>of</strong> Occupational andEnvironmental Hygiene 10 comment on the captioned paper.Attached, please find the comments from our institute for your consideration.If further information is required, please feel free to contact the undersigned at 27665993.Thank you very much for your attention.Yours sincerely,sidentInstitute <strong>of</strong> Occupational& Environment Hygiene

10-SEP-1999 17:57 FROM TO 28278040JComments on IAQ Guidelines & Consultative PaperL While it is a good idea to establish IAQ information centre to provide informationand reference to interested parties, it is difficult to see how the proposed voluntaryIAQ certificate system can get wide acceptance without making it a legalrequirement2. Paragraph 21 - che use <strong>of</strong> 'high class" to describe IAQ levels at Level 1 standardscould be mis-leading in many senses. It is suggested to use the term 'health 1 orthe like.3. Paragraph 21 - the criteria for defining various IAQ Levels should be able toprovide people with a sense <strong>of</strong> inter-relationship*. For example, while Level 2 issaid to 'provide protection to the public .....', with similar line <strong>of</strong> descriptionadopted for Level 3, the description for Level 1 should also following the samepattern and wording in description, such as 'protection 1 , 'health and safety' , etc.4. <strong>The</strong>re should be incentives included in the scheme to persuade building owners toadopt the IAQ guidelines rather than jusi Voluntary 1 .5. Paragraph 25 - it is important to ensure adequate supply <strong>of</strong> 'suitably qualifiedpersonnel to assess the lAQ' parameters. Does EPD have any statistics on thecurrent manpower status for that category <strong>of</strong> pr<strong>of</strong>essional in <strong>Hong</strong> <strong>Kong</strong>?6. Paragraph 26 - on the issue <strong>of</strong> certificates, is there mechanisms to control orregulate the authorities to ensure that the certificate issuing process is not affectedby improper influence?7. Paragraph 26 - is the certificate good for what "unit 1 <strong>of</strong> premises? Each unit inthe building? Whole floor? Whole building? <strong>The</strong>re should be consideration thaithe premises in a building may have different uses.8. Paragraph 31 - the scheme may be adopted by a few <strong>of</strong> class A commercialbuilding which have tenants from multi-national establishment. In that case, fatbuilding owners may ask for a higher rental return with the certificate* It isdifficult to see similar incentives available for owners <strong>of</strong> less proper buildings.9. Paragraph 34 - why government buildings are allowed to meet a lower standard<strong>of</strong> Level 2 and Dot Level 1 ? Government should take the lead in this program.cf Notes for MatngynitJflt <strong>of</strong> IAO1. Paragraph 1.6 and Table 1-1 - it is agreed that the duties <strong>of</strong> building owners maybe modified by contractual agreement. In such cases, it can avoid confusion andargument by clearly indicating that exact party responsible for IAQ. if buildingowners or building managers are relieved <strong>of</strong> their duties by contract2. Table 1* 1 - what is the responsibilities <strong>of</strong> occupiers/tenants <strong>of</strong> the building?3. Paragraph 2.6.3 - with available lexicological information on ETS, why doesn'tEPD ban smoking in buildings? In fact, it is envisaged thai the prohibition <strong>of</strong>smoking can greatly improve the IAQ in most buildings.10-SEP-1999 17:40 BS2 2764 0421 99* - . •10-SEP-1999 17540 495222349106 '

10-SEP-1999 17:57 FROM TO 28278040 P. 03/044. Paragraph 3.3 - if the GN is not intended to cover industrial buildings, why needto have Lave! 3 included in the rating system? <strong>The</strong> more complicated the ratingsystem, the more will be the confusion,5. Paragraph 3,3 - it is not true that smoking is prohibited in many buildings andtherefore nicotine monitoring is not required in the assessment. Most commercialbuildings, where the ON will apply, do not ban smoking. <strong>The</strong> same is true forrestaurants and designated eating areas in shopping malls. Hence, the reasons fornot including nicotine monitoring is not strong enough.6. Paragraph 3.3 - fungal counts is different from bacterial counts in term <strong>of</strong> sources<strong>of</strong> problem and thus the monitoring for this category <strong>of</strong> parameters should not beomitted7. Paragraph 3.3 - air movement can determine whether the occupants are'comfortable' or not and therefore, should be required especially for Level 1certificates.8. Table 4-1 - the nature <strong>of</strong> carcinogenic compounds listed in Table 4-1 should bespecified,9. Paragraph 9.1.3,1 - the second category <strong>of</strong> authorised analyst includes personswith relevant qualifications; and has been an Approved Signatory <strong>of</strong> an accreditedlaboratory for more than 2 years. It is proposed that the 2 years <strong>of</strong> signatoryshould be on relevant areas <strong>of</strong> testing such as environmental or chemical testingrather than to include all areas <strong>of</strong> testing to be authorised analyst10. Paragraph 9.13 J - the first category <strong>of</strong> authorised analyst include suitablequalifications with 2 years relevant testing experience in laboratory. It issuggested that the 2 years <strong>of</strong> testing experience in laboratory should be replacedby 'in laboratory or in monitoring <strong>of</strong> IAQ parameters 1 . <strong>The</strong> reason being that theuse <strong>of</strong> detector tubes are allowed for some tests and it is known that detector tubesneed no further laboratory works to obtain results. Hence, it is appropriate tomake the change.11. Paragraph 9.1,3,1 - the first category <strong>of</strong> authorised analyst should includeappropriate degrees in Biochemistry if Biology has been included together withMicrobiology.12. Appendix B - the inclusion <strong>of</strong> registered safety <strong>of</strong>ficer (RSO) as qualifiedpersonnel for IAQ assessment would be in doubt. It is suggested that only thoseRSO who have had attended approved training courses on IAQ can be included asqualified personnel. For similar reason* 'person with IAQ assessment training'should mean a formal certificate awarded by examination and not just attendancecertificate.10. <strong>The</strong> whole idea, <strong>of</strong> doing something on indoor air quality and (he general direction<strong>of</strong> the documents are agreeable,1L It may not be necessary to classify IAQ levels into three classes since industrialbuildings are excluded from the application <strong>of</strong> the guidelines. Level 3 which is onCKJCupaUorxtl cxposurei and which are most corrOTOnly occurred in industridbuildings can be dropped to simply the picture.Ift^KSSl?.* ^>^4 9106 P-03

.0-SEP-1999 1?:S7FROMT0 rn 3P99fi0a0 P. 04/042827804012. <strong>The</strong>re should be some kind <strong>of</strong> incentives to building owners to join intothe project voluntarily.13. Because there are i wide range <strong>of</strong> TVOC and each may have differenttoxicological properties and safety standards, if may be necessary to citerecommended levels for individual chemicals.14. Government buildings should be able to meet Level 1 standards as a goodexample to the general public.5S. Cam must be exercised in identifying appropriate pr<strong>of</strong>essionals to undertake IAQassessment <strong>The</strong> details <strong>of</strong> training courses <strong>of</strong> the pr<strong>of</strong>essionals should be studiedOnly those which have actually included an acceptable indoor air quality trainingcomponents can be accepted For example, there should be hesitation to includepr<strong>of</strong>essionals with general safety training and who had not gone through trainingcomponents on IAQ as qualified IAQ assessors. <strong>The</strong> same opinion also applies topr<strong>of</strong>essional engineers who have no training on IAQ,16. <strong>The</strong>re may not be adequate training courses on IAQ to accommodate demands bypeople who wish to enter into the pr<strong>of</strong>essions.10-SEP-1999 17*40 +852 2234 3106TOTAL P.04P.04

26/10 '99 16:39 852 2868 4612 HKIS Pg. 02THE HONG KONG INSTITUTE OF SURVEYORSSuite 510 Jardine HOUW, 1 Connaught Plaea, Central, <strong>Hong</strong> <strong>Kong</strong> Tel: (852) 2526 #67$ Fax: (852) 2868 4612SB: (862) 2526 3679 HSflK^fSKft 2868 4612hMp:/A«fl»w.hW8.org.hk20 September, 1999MrKASaIkeId,JPDeputy Secretary (Environment)Planning, Environment & Lands BureauEnvironment Division9/FM;iiray BuildingGarden RoadCentral, <strong>Hong</strong> <strong>Kong</strong>By FAX (2234 9106} ap $y PtetDearMrSalkeldConsultation Paper on Managing Indoor Air Quality (IAQ)Thank you for sending us the captioned Consultation Piper aa well as a set odtGuidaiice Notesfor the Management <strong>of</strong> IAQ in Offices and Public Places (the GN) for our comtiicat.We welcome Governments initiatives as set out in the Consultation Paper $n *ldressing theIAQ issue which is an important attribute to human health and woxk proclii^il^. ' We alsoacknowledge the overall complexity <strong>of</strong> the subject <strong>of</strong> IAQ in terms <strong>of</strong> legajl ^iax^BWMJc, publicunderstanding, technical details, implementation and enforcement. Inevft^, 1 fecre will becost burden to building owners or tenants if they arc required to comply w&laid down in the GN. Having said that we My support the po^level <strong>of</strong> IAQ in <strong>Hong</strong> <strong>Kong</strong> and are prepared to extend our assistance in aOT^mglhe IAQobjectives and standards; in particular through our members' pr<strong>of</strong>essional j^iticw'in.Tpropeitydevelopment, building design, construction, leasing, property management mAs regards the content <strong>of</strong> the Draft GN, we would set out our w(1) <strong>The</strong> success <strong>of</strong> the self-regulation scheme and certification system tt^.djqpcnd on anumber <strong>of</strong> factors among which are how likely the measurements t&e| ty. ^buildingowners can comply with the objectives and owners 1 degree <strong>of</strong> copt$

26/10 '99 16:40 852 2868 4612 HKIS p g . 031.2 Close monitoring on or control over tenanfg choice <strong>of</strong>premises, fitting out material they use etc. is practicallywhen it involves legislative issues such as fire andstraight forward,age <strong>of</strong> theare more1.3 <strong>The</strong> source <strong>of</strong> some pollution like bacteria, TVOC, fonnalcE^Ni 5&SP etc. areusually generated by tiie tenants.(2) <strong>The</strong> assessment scheme should be based on the responsibility <strong>of</strong> awhat they can practically control Our suggestion is to take mfollowing parameters and locations:owner andneoti on theiFresh air quantity supplied to every occupied space.Quality <strong>of</strong> the fresh air (to make sure fresh air intakes are ndt itar any pollutantsources).iiivviviiRSP at supply ducts and return air ducts to ensure thai th^jfflte* sore beingoperated and maintained properly.CO 2 at return air plenums/ducts to ensure in general, an appropriatefresh air has been supplied to the tenants.unt <strong>of</strong>Formaldehyde or TVOC at return air plenums/ducts and pilbfie ijlws.to ensureno excessive sources <strong>of</strong> those pollutants are being ga&n^fy^owners and in general, enough fresh air has been provide^ to, dilute thosepollutants.Radon at public areas to ensure enough ventilation has been iioiridodito diluteany radon gas,Building owners to cany out detailed investigations.measurements indicate that there is a problem or when ocreceived.the abovehave t>cen...7P326-QCT-1999 16:37 85228684612

26/10 '99 16:40 852 2868 4612 HXIS Pg. 04(3) <strong>The</strong> GN suggested various methods to take the^methcxls may come up with dif^^only one measurement method so that there can be 230 confimoncompared with what Le. we compare apples with apples*vjiat'is being(4) Only a few Orade A <strong>of</strong>fice towers may have the r to If tbebuilding owners find the assessment impractical for them to acMe^^thcy" : will justignore it Given the low proportion <strong>of</strong> woxkers woridng in those Ora^e A <strong>of</strong>fices, tbeproportion <strong>of</strong> workers benefiting from the scheme would be minimal -(5)(6)<strong>The</strong> degree <strong>of</strong> influence <strong>of</strong> the tenants' committee is a toy to theBut we doubt that the influence <strong>of</strong> the committee members will havethe actual procurement or fitting out decisions <strong>of</strong> their company.iiidi bearing onIt appears from the GN that the EPD is not prepared to establish a Igst <strong>of</strong> alternativematerials and suppliers for less pollutant-emission materials. We befeyc that this kind<strong>of</strong> list is critical to the success <strong>of</strong> improving IAQ as this will -*e marketcompetition and will generate a force to produce IAQ fiimdly ij . Alsoinformation to the committee members is important as they neei to mow whatalternatives are available and how to obtain them. Suppliersincluded on this list(7) We suggest that the EPD should registered the IAQ committees.the effectiveness <strong>of</strong> the programme and also provide a channelinformation and getting feedback*monitoring<strong>of</strong>(8)Extensive training workshops should be carried out by the EPD ft irain the IAQcommittees on the details <strong>of</strong> the GN. We would expect (hat most W toe committeemembers will be laymen in IAQ especially those fiom tenants.We obsove that smoking is still amqor source <strong>of</strong> indoor air ix>tf^restaurants and entertainment premises. <strong>The</strong> GN should therefore tkj jsctatfhing moreon fliis problem...JP426-OCT-1999 16*37- 852 2868 4612 98X P.04

26/10 '99 16:4! 852 2868 4612 HKIS Pg. 05Page 4(10) We understand that the HK-BEAM, which is a similar voluntary scqaae,' has alreadyincluded IAQ among other environmental issues. Why not adopt

H HE 4? 4r % 4THE HONG KONG OCCUPATIONAL SAFETY AND HEALTH ASSOCIATION^ _^ f jj. _ .«. ^ (Incorportedwi^LM^UaiMy)21* Anniversary, 21 st CenturyEnvironmental Protection Department(Branch Office)33/F, Revenue Tower5 Gloucester RoadWanchai, <strong>Hong</strong> <strong>Kong</strong>OurRef:CSU-99-058September 10,1999Mr. Patrick M BURKEmmmmm(1998 Jt 1999Attention: Dr Alain LamDear Dr Lam,fillConsultation on Managing Indoor Air QualityWe have pleasure in submitting our opinions on the captionedsubject as enclosed.In general, we support the proposed IAQ objectives andimplementation program, and appreciate the effort <strong>of</strong> yourDepartment in making known to the community the hazards <strong>of</strong>poor indoor air quality, and in devising the improvement program.Yours sincerely,r n~fWaiYmWONfl^President (/s<strong>of</strong>t*G. R O; Box 7100, Central, <strong>Hong</strong> <strong>Kong</strong>.Tel: 2332 9210 Fax: 2770 0542 E-mail: hkosha@hk.supennetHomepage address: http://www.hk.3Uper.net/-hkosha5§fr Ml AHONORARY ADVISERS<strong>The</strong> Hon. Yiu Chung TAM» JPMr. Raymond A BATES, JPPr<strong>of</strong>. Yiu Chung CHENG&. Dr. <strong>The</strong> Hon. Raymond C T HOMBE.SBStJ.jpMr. Yuk Lira YIPPr<strong>of</strong>. TP LEUNG JPIr. James BLAKE, QBE, JP<strong>The</strong> Hon. Sai Chit HO, QBE, JPPr<strong>of</strong>. Ngok LEE, JPDr. KM Hung SHUENHonorary Legal AdviserMr. Patrick M BURKEHonorary AaditorMr. Paul MP CHANBxecvtive C0vnett (1998 Jk 1999)Pntidettt Mr. Wai Yin WONGVtePrtsldeat Mr.IvmnKWLAMHan. Secretary Mr. Victor C L KWONGHon. Tmtasnrer Dr. Twmy Y F TS ANGMembersDr. Alex K W CHEUNGMr. Yiu Kucn KAMMr. Chi Sing LAMMr. AndyHYLOMr. Chi Ming LAWMr. Danny KH MAMr. Danny C W TONOMr. Scorpio W C WONGMr. Yum Yin WONGMr. Chung -Vfcen YEUNGMr. Nelson K C YUInmtdUte Past PntsidtntDr. Alex KW CHEUNG

<strong>Hong</strong> <strong>Kong</strong> Occupational Safety and Health AssociationTo : Environmental Protection Department1. BackgroundOpinions on Managing Indoor Air QualitySeptember 10, 19991.1 <strong>The</strong> Association was invited by the Environmental Protection Department (EPD)to comment on the following two documents:(a) Managing Indoor Air Quality-- A Consultation Paper, and(b) Draft Guidance Notes for the Management <strong>of</strong> Indoor Air Quality in Officesand Public Places.1.2 <strong>The</strong> <strong>Hong</strong> <strong>Kong</strong> Occupational Safety and Health Association is a learned societyestablished in 1977 with the objectives to promote the development <strong>of</strong>occupational safety and health in <strong>Hong</strong> <strong>Kong</strong>. Crarently, we have about 450individual members and 55 company members. <strong>The</strong> majority <strong>of</strong> the individualmembers are safety pr<strong>of</strong>essionals, Registered Safety Officers, and pr<strong>of</strong>essionals inother disciplines who are interested in promoting occupational safety and health.1.3 <strong>The</strong> Association views that Indoor Air Quality (IAQ) greatly affects the health <strong>of</strong>persons in workplaces, and that IAQ is one <strong>of</strong> the factors for occupationalaccidents but is not easily verifiable and is seldom addressed by the accidentinvestigators.2. Comments2.1 <strong>The</strong> Association generally supports the policy and implementation program forimprovement <strong>of</strong> IAQ as proposed in the Consultation Paper. However* we haveopinions as set out in the following paragraphs for the consideration <strong>of</strong> EPD.2.2 It may not be necessary to classify IAQ levels into three classes since industrialbuildings are excluded from the application <strong>of</strong> the guidelines. Level 3 which ison occupational exposures that are commonly occurred in industrial buildings canbe dropped to simplify the picture.23 As the quality <strong>of</strong> intake air and the maintenance <strong>of</strong> air filters in the air conditioningsystems are two crucial factors to the IAQ, but are relatively less technical and lesscostly to be handled by the building management, the checking and, where

necessary, modification <strong>of</strong> the intake points <strong>of</strong> outdoor air, and Hie frequentcleaning <strong>of</strong> air filters should be placed in priority in the educational and legislativeprograms.2.4 Renovation works and pest control activities will cause acute effect to poor IAQ,and may lead to a disaster to the occupants. Strict controls to these two kinds <strong>of</strong>activities which are commonly carried out in buildings should be legislated andenforced in priority.2.5 <strong>The</strong>re should be some kind <strong>of</strong> incentive to encourage building owners to join theproject voluntarily.2.6 As there are a wide range <strong>of</strong> Total Volatile Organic Compounds (TVOC) and eachmay have different toxicological properties and safety standards, it may benecessary to cite recommended levels for individual chemicals.2.7 Government buildings should be able to meet Level 1 standards as a good exampleto the general public.2.8 Care must be exercised in identifying appropriate pr<strong>of</strong>essionals to undertake IAQassessment <strong>The</strong> details <strong>of</strong> training courses <strong>of</strong> the pr<strong>of</strong>essionals should beexamined. Only those which have actually included an acceptable indoor airquality training components should be accepted For example, there should behesitation to include pr<strong>of</strong>essionals with general safety training and who had notgone through training components on IAQ as qualified IAQ assessors. <strong>The</strong> sameopinion also applies to pr<strong>of</strong>essional engineers who have no training on IAQ.2.9 <strong>The</strong>re may not be adequate training courses on IAQ to accommodate the demandby people who wish to enter into the pr<strong>of</strong>essions.3. CONCLUSIONSWe generally support the proposed IAQ policy, strategy, and guidance notes.However, further consideration by EPD is required in respect <strong>of</strong> the criticalcomponents <strong>of</strong> IAQ; the likelihood <strong>of</strong> disaster caused by poor IAQ; the costeffectiveness<strong>of</strong> improvement measures to be taken by building owners; thecompetence <strong>of</strong> IAQ assessors; and the provision <strong>of</strong> IAQ training, as detailed in theabove paragraphs.WYWong, jpfeadent

FR'OM* sHKPC TO t +852 2827 8040<strong>Hong</strong> <strong>Kong</strong>Productivity Council«*&S*C*ftEnvirenmcnut Management DW«!onOur E-mail:HKPCA)102AflSC/199909/99906rfi6* September 1999 By Pax Only(Fax.:22349tW)Planning, Environment A BureauEnvironment Division9/F, Murray BuildingGarden RoadCentral<strong>Hong</strong> <strong>Kong</strong> jDear Sir,'• iConsultation on Managing Indoor Air QualityReference is made to EPD's letter re£ () b EP21^captioned subject. jWe are pleased to enclose our comment on the consultation documents foryour kind consideration.Thank you for your attention.Yours sincerely,for Executive!ent Divisionc.c.:Dr. Alain Lam-EPD (Fax: 28278040)14:59 652 2786 5603 95X P. 01

FROM :HKPC TO s +852 2827 8040 1999.03*06 14:48 #324 P. 02/02Gmsutoticm on Managing Indoor Air Q^llty-Comments framHKPC1.3.iWe welcome and applaud the Government to take lead in tackling indoor air quality(IAQ) problems in <strong>of</strong>fices and public places. <strong>The</strong> issue has been gaining publicattention in recent years and appropriate action has to be done properly and quickly.iWe also agree ito the broad approach to tackle the IAQ issues through voluntary selfregulationapproach combined with a certification system to declare the level <strong>of</strong>compliance to the IAQ objectives.iWhile we appreciate the need to set different levels <strong>of</strong> IAQ objectives in order toencourage participation by property owners to improve their buildings IAQ> we havestrong reservation to set the proposed Level 3 IAQ objectives at the OccupationalExposure Limits (OELs). As pointed out in Section 3.1 <strong>of</strong> the Guidance Notes for theManagement <strong>of</strong> Indoor Air Quality in Offices and Public Places (page 21), IAQobjectives are intended to protect a more diverse target population which may includechildren, the aged and infirm, and people with chemical sensitivity. <strong>The</strong> proposedLevel 3 IAQ objectives totally fail to <strong>of</strong>fer such protection to building occupants. Itshould be noted that the Occupational Safely & Health Ordinance (OSHO) alreadyrequires statutorily full compliance with the OELs and so it seems inappropriate to setIAQ objectives at OELs in this voluntary regulatory system <strong>of</strong> IAQ managementWorse still, w&en such Level 3 objectives art set for the public, it would misdirect thepublic to aim at this level <strong>of</strong> objectives and be satisfied with such level. If that is thecase, the whole purpose <strong>of</strong> the IAQ management system would break down. It issimply not sufficient to make a bare statement just to encourage achievement <strong>of</strong> at leastLevel 2 objectives (page 24 <strong>of</strong> Guidance Note).effort to impmvmgr TAQ ftf <strong>of</strong>fiMn mA pnhlie plicM. we thtrtfnr* •iiyqrit to dtltttL*yJ a nhjerfivi* fnmpletely and «*t fh* minim urn reqiifrmifetit to achieveTI»We agree to set pr<strong>of</strong>essional qualification requirements on Authorized Analyst andCompetent Examiner. <strong>The</strong> proposed qualification requirements aw appropriate.i<strong>The</strong> proposal to set up an IAQ Information Centre is welcome. If resources allow, wesuggest setting up the Information Centre in first phase so that it can be in line with thepublic education and publicity campaign. We believe that the public education andpublicity campaign will be more effective if an IAQ Information Centre has already beenin operation. '7.We agree to require all government buildings to conduct annual inspection and certifytheir compliance with the Level 2 objectives. If resources are available, we hope to seesuch action being implemented as early as possible.• . iWe suggest including total fungal count in the parameter list for IAQ objectives becausefungi can leadlto adverse health impacts and fungal count cannot be adequately reflectedby bacterial count.Prepared by <strong>Hong</strong> <strong>Kong</strong> Productivity CouncilDate: 6* Septembcrl999Environmental Management Division<strong>Hong</strong> <strong>Kong</strong> Productivity CouncilHKPO0102/MISC/l99909/99906rOPagel06-SEP-19i9 14*59 852 2768 5608 95* P.02

n« HONG KONGPOLYTECHNIC UNIVERSITYftffl Att U«H*4e K«« cFACSIMILE TRANSMISSION*#*»&,>mm?£**!?"CtaM-kiwisj,0! J^iMtAMliTljffiy •«•"Mr-A fa iP-I^m — -»_—_Fax No.:7234t9lQfi* ——TOtfMimt (SttlFrom: T>r ^""^3 Q lf ADate: r^qpt^nn^rQ, TQM j^j.No <strong>of</strong> pages (including this one):Dear Sir.Comments on the Consultation on Managing Indoor Mf Qi M^fYEnclosed please find my comments on the above document.L(i)(ii)(iii)RSP setting at < 20 ug/ni 3 (8 hr avg.) for Level 1 is really hard to maintain formost <strong>of</strong> indoor environment especially public places such as shopping mall,theaters, etc.I suggest to put < 100 ug/m 3 for level 1Besides airborne bacteria, fungi should also be included in the IAQ objective.Under Table 4-1, classficauon <strong>of</strong> emission rates for carcinogenic compounds, it isreally expensive and complex to certify 5 ug/mVh for carcinogen compounds.<strong>The</strong>re will be some problems to define which compounds are carcinogen, some <strong>of</strong>compounds are suspected carcinogen (not confirmed), I suggest to delete this itemand just use TVOC for a screening purposes OR define specific copounds such asbenzene, toluene, etc.Sincerely,Air-Lab-In-Charge and Asistant Pr<strong>of</strong><strong>Hong</strong> <strong>Kong</strong> Polytechnic <strong>University</strong>

THEHONGKONG & r^vaiem**/UNIVERSITY OF * QeafVowrOoy5OENCE&TECHNOLOGYW.: (852) 2354 8650Planning, Environment & Lands BureauChristopher YJH. ChaoEnvironment DivisionAssistant Pr<strong>of</strong>essor9/F, Murray Building Tel: (852) 23S8 7210Garden Road, Central, <strong>Hong</strong> <strong>Kong</strong>E-Mail: meyhchao@ust.hkDear Sirs/Madam,September 6,1999HE: Comments on the Draft Guidance Notes for the Management <strong>of</strong> IndoorAir Quality in Offices and Public PlacesA consultation paper and a set <strong>of</strong> guidance notes on the captioned subject wastransferred from the School <strong>of</strong> Engineering at the <strong>Hong</strong> <strong>Kong</strong> <strong>University</strong> <strong>of</strong>Science and Technology to my <strong>of</strong>fice for comments. I have carefully revieweddie consultation paper and the guidance notes and I am very pleased to notice thatthe government is willing to take an initiative step in setting up a framework forindoor air quality management in buildings. Some comments are attached herefor your consideration with the aim to make this framework and the set <strong>of</strong>guidance notes more dear and effective in the implementation.1. <strong>The</strong> guidance notes propose a certification program for IAQ assessment inbuildings under a voluntary basis. I think the concept <strong>of</strong> self-regulation isgood. However, it is not dearly written down in the draft guidance notes howthis certification program will be conducted. <strong>The</strong> document has implied thatthe government will be the authorization party and two pr<strong>of</strong>essionals aredefined for the certification purpose. One group is called Authorised Analystand the other group is called Competent Examiner. It seems to me thatAuthorised Analyst will be the one taking care <strong>of</strong> the quality control <strong>of</strong> thelaboratory testing work and Competent Examiner is the one who manages andimplements the assessment scheme. Including two pr<strong>of</strong>essionals in the IAQassessment will make the cost for each test very expensive and I am worried ifthe majority <strong>of</strong> the building owners can afford it. In many IAQ measurements,

09-SEP-1999 10541 FROM TO 28278040 P. 02x05such as measurements <strong>of</strong> carbon dioxide, carbon monoxide or the variousthermal comfort parameters,, measurement is conducted on sites and I tMnkthe Competent Examiner can handle the quality control Other parameterssuch as TVOC, if the sample is analyzed in an accredited commerciallaboratory or in a research laboratory with track record in indoor air qualitystudy such as an university laboratory, the quality is up to a certain standard.My opinion in this is that we do not need two groups <strong>of</strong> pr<strong>of</strong>essionals in the .certification procedure. 1 think these two groups <strong>of</strong> people are equallycompetent in participating in the certification exercise and the most importantpart is their track record and past experiences in "IAQ" study in "buildings",not whether they are laboratory scientists or pr<strong>of</strong>essional engineers. <strong>The</strong> role<strong>of</strong> other pr<strong>of</strong>essionals defined in 9.1.1 and 9,1.2 is also not clear in thecertification procedure.2. It is not dear about whether all the premises inside the building are needed forassessment in the certification program. It is practically impossible if all thepremises are needed for detailed assessment as it will be very costly* In thedocument two concepts are laid down, i.e. screening test and detailedmeasurement, although in many areas description <strong>of</strong> when these twoapproaches should be employed is confusing. I suggest that simple screeningtest on carbon dioxide as an indicator <strong>of</strong> ventilation adequacy and walkthroughinspection on the general hygienic and maintenance condition areneeded for all premises. <strong>The</strong> competent person is then required to suggest tothe client which floor is needed for detailed assessment and for certificationpurpose, I believe that the competent person will not encourage the client toapply for a certification if most <strong>of</strong> the floors are in poor condition. He willonly do so if most <strong>of</strong> the floors or all <strong>of</strong> the floors are in good condition. Inthis case, the authority may specify in the document that detailedmeasurement results <strong>of</strong> a limited number <strong>of</strong> premises are needed in thecertification exercise.3. <strong>The</strong> document does not specify clearly whether all the 1AQ parambe met if a certain level is targeted at, even if it looks like that. Clarification is•09-SEP-1999 10:24 +852 2234 9106,

2|9~SEP-1999 10241 FROM T0 2827B040 P. 03/05needed in the document It is also not mentioned how <strong>of</strong>ten this assessment». .i* should be carried out in order to keep the certified level.4. Measurement <strong>of</strong> the parameters listed in the document i$ sometimes hard todistinguish smoking areas from nonsmoking areas. In some <strong>of</strong> my researchworks, I have noticed that some smoking <strong>of</strong>fices passed all the Level 2requirements. However, we could still clearly identified the smell <strong>of</strong> ETS andour perception told us that those <strong>of</strong>fices could hardly be considered asacceptable. <strong>The</strong> problem is that RSP and TVOC levels are correlated to ETSbut the correlation may not be as strong as what we thought before (philips K,Howard D.A., Bentley MC, Assessment <strong>of</strong> Environmental Tobacco Smoke .and R&spirable Suspended Particle Exposures for Nonsmokers in <strong>Hong</strong> <strong>Kong</strong>Using Persona! Monitoring, Environment International, 24(8), pp. 851-870,1998).5. Is 3.4,1 part <strong>of</strong> the requirement <strong>of</strong> 3 A2 on pages 27*28?6. On page 30, measurements at the mixed air supply and exhaust plenum aretechnically not feasible in many buildings. <strong>The</strong>re is usually no provision inthe HVAC ductwork for you to put your sensors in and in most <strong>of</strong> thebuildings, clear location <strong>of</strong> exhaust plenum does not exist.7. On page 30, what happens if levels <strong>of</strong> the individual VOCs as shown in Table3-3 are acceptable but TVOC level exceeds the objectives, which is possiblein miny cases?8. It is noted that fungi measurement is not included. However, recent researchhas indicated that ftingi count has been related to a lot <strong>of</strong> "sick buildingsyndrome" related cases and VOCs can be emitted from many flingi matters(Bayer C, Crow £A., Fischer J., Causes <strong>of</strong> Indoor Air Quality Problems inSchools ~ Summary <strong>of</strong> Scientific Research, Department <strong>of</strong> Energy, USA,1999).09-SBM999 10:24 4852 2234 9106

09-SEP-1999 10541FROM:TO 28278040P.04/05Yt* •«.9. While alpha trick detector is used for radon monitoring, do we need to*. consider the evening pr<strong>of</strong>ile and the morning pr<strong>of</strong>ile,10. Appendix B specifies the skeleton for compliance with OSHO and I have thefeeling that the appendix indicates that CO* is the only parameter that isneeded unless high COa level is measured. Measurement <strong>of</strong> other parameterswill be subject to the pr<strong>of</strong>essional judgement <strong>of</strong> the consultants themselves. Itimplicitly means that most buildings will only measure COa as it will be varycostly to measure other parameters. I am generally agreeing with this but the..final outcome really depends on the quality <strong>of</strong> the consultants4n judging ~whether other parameters are needed. In Appendix B, even though the level<strong>of</strong> CO* for concern has not been listed explicitly, it has been implicitly leadingto 1000 ppm or something close to this level as ASHRAE 62-1989 has beenreferred to as the industrial standard to estimate the amount <strong>of</strong> fresh airsupply. This 1000 ppm COa level is inconsistent with the 5000 ppm DEL for *COa for the Level 3 compliance as shown in Table 3-2.11. Is subway concourse included in this document?12. Indoor air quality is a new area and a lot <strong>of</strong> new information is coming out Iwould suggest that update <strong>of</strong> the document is needed regularly. Meanwhilethe research effort in <strong>Hong</strong> <strong>Kong</strong> on indoor air quality is far away from beingsatisfactory when compared to other overseas countries. <strong>The</strong> governmentshould consider taking the leid in collecting research data which can be usedto fine-tune the standards and levels set in the guidance notes rather thandirectly copying overseas experiences. It should be noted that establishment <strong>of</strong>a standard or guideline in an overseas country has actually gone through manylong-term research developments supported by the government. <strong>Hong</strong> <strong>Kong</strong>has been slow in this aspect and we should not still rely on our previouspractice <strong>of</strong> not collecting our own database but just look it overseas guideline.I would suggest that more resources should be allocated to the indoor airquality group at EPD for initiating the IAQ management program in <strong>Hong</strong><strong>Kong</strong>. <strong>The</strong> program should be a comprehensive one including education and09-SEP-1999 10:24 4852 2334 9106 P«04

09-SEP-1399 10:41 FROM TO 28278040 P.05/05lesearch development. In fcet I am pleased to see that a lot <strong>of</strong> activities havebeen planned as laid down in the consultation paper.Sincerely,Christopher QuoAssistant Pr<strong>of</strong>essor <strong>of</strong> Mechanical Engineering-<strong>The</strong> <strong>Hong</strong> <strong>Kong</strong> <strong>University</strong> <strong>of</strong> Science and Technology09-SEP-1999 10824 +852 2234 9106TOTAL P. 05P.0S

BONG KONG COLLEGE OF COMMUNITY MEDICINEFomdu CoUefe <strong>of</strong> lfe« Ume Xoac AndMiy <strong>of</strong> Mvdlctaefwrporattd wtih Kmittd KuttlilyDr. Alain LamPlanning, Environment & Lands BureauEnvironment Division9/F., Murray BuildingGarden RoadCentral<strong>Hong</strong> <strong>Kong</strong>26 August 1999Dear Sir,Consultation on Managing Indoor Air QnalityThank you for your letter dated 3 August 1999" inviting mycomments to the consultation paper on managing indoor air quality (IAQ)and the guidance notes for the management <strong>of</strong> IAQ in <strong>of</strong>fices and publicplaces.My comments are as set out below:1. <strong>The</strong> setting 3-level IAQ-It is inappropriate to compare workplace IAQ (level 3) withpublic place IAQ (levels 1 & 2) as both are different.02-SEP-1999 10J02 +85223141721 P.09

02-SEP-1999 10:27 FROM T0 28279040 P.02/12From your description <strong>of</strong> public place IAQ. in the consultationpapers, the major differences are -Public Place IAQWorkplace TAQ (PEL)(i) Aim comfort as well as health protection onlyhealth protection(ii) Target all people including adult employeesthe very young andthe aged which arenot present in theworkplace(iii) Use as a goal (something as compliance standardsto achieve or aspire (minimum standards forto and which the compliance with thecommunity should Occupational Safely &work towards) Health Ordinance andRegulation)To grade workplace IAQ (OEL) with public place IAQ is likegrading apple with orange. As the aim, use and target in thesetting <strong>of</strong> these two standards are different, workplace IAQ(OEL) should not be portrayed as an inferior one. <strong>The</strong>re isno place in the world which groups public and workplace IAQtogether giving different gradings. It would cause confusionto both the duty holders under the Occupational Safety &Health Ordinance and Regulation and the general public.Instead <strong>of</strong> setting 3 different levels, other developed countries,such as Australia, are calling for harmonisation <strong>of</strong>occupational and public indoor air quality standards. <strong>The</strong>rehas been established practice <strong>of</strong> bonrowing occupationalstandards as a basis for indoor air standards because <strong>of</strong> thelarge number <strong>of</strong> well developed occupational exposurestandards. For example, ASHRAE in the standard forVentilating for Acceptable IAQ have used a concept <strong>of</strong> settingIAQ standards at one-tenth <strong>of</strong> ACGIH threshold limit values.02-SEP-1999 10:02 +85223141721 P-10

02-SEP-1999 10:27 FROM T0 28278040 P.03/12You may wish to refer to the paper published by E. Emmett,Worksafe, Australia entitled "Harmonisation <strong>of</strong> OccupationalPublic Health and Indoor Environment Air Quality Standards".A copy is enclosed for your easy reference.To complete the whole spectrum <strong>of</strong> IAQ for public places, it isessential to develop compliance standards (minimumstandards), so as to assist the employers in public premises todischarge then: legal obligations under the Air PollutionControl Ordinance. Level 3 IAQ should be replaced by a set<strong>of</strong> compliance standards for public pB^es IAQ.^ WorkplaceIAQ should be a separate category <strong>of</strong> air standards,2. Self-regulation:<strong>The</strong> idea <strong>of</strong> self-regulation is good However, the question <strong>of</strong>who are the suitably qualified personnel? <strong>The</strong>re should be asuitable authority to register these suitably qualified personnel.In the Code <strong>of</strong> Practice (para,, vague terms such as"person with relevant academic and pr<strong>of</strong>essionalqualifications" "2-years relevant testing experience inlaboratory" have been used. <strong>The</strong>re is a need for aGovernment department or a central agency to act as aregulatory authority to determine whether the pr<strong>of</strong>essionalqualifications and experience are relevant or not and to takedisciplinary actions for non-compliance with their pr<strong>of</strong>essionalconduct and ethics.Yours sincerely,c.c. Dr. T.H. Leung (w/encl)Secretary, HKCCM(Dr.-WX.LO)on behalf <strong>of</strong> the <strong>Hong</strong> <strong>Kong</strong> College<strong>of</strong> Community Medicine02tSEP-1999 10:02 + 852 2314 1721

<strong>Hong</strong> ftong Radiation Protection Societyc/o Radioisotop* Unit, <strong>The</strong> <strong>University</strong> <strong>of</strong> <strong>Hong</strong> <strong>Kong</strong>Pokfulam Rood, <strong>Hong</strong> <strong>Kong</strong>Tel: (852) 2859 2547 Fax (852} 2559 5557Hon. Advisors36f!tH!!i&£tPr<strong>of</strong>. H.K. Changm®&&Pr<strong>of</strong>. Edward K.Y. ChenM&ftftPr<strong>of</strong>. Y.C.Cheng£8*385Pr<strong>of</strong>. Arthur K.C. LiPr<strong>of</strong>. O.K. PoonDr. Alain LamActing Principal Environmental Protection OfficerEnvironmental Protection Department Branch Office33/F, Revenue Tower5 Gloucester RoadWan Chai, <strong>Hong</strong> <strong>Kong</strong>September 9,1999«**»**Hon. FellowsOr. Margaret Chan78£&f$$Pr<strong>of</strong>. 23-qiang Pan&?:&»£Or. Hector T.Q. MaHon. Legal Advisor&*$&£Mr. Carson WenAuditorMr. Charles ChanExecutive ***** CommitteeChairpersonW3E*»W±Dr.M.Y.W.TsoVice-ChairmanWWIfdtDr. K.Y. CheungttttffcftHon. SecretaryDr. K.M. Mamm*Hon. TreasurerOr. J.K.C. Leung** MembersnwKwaMs. Joyce Leung^CtiftttdrDr.C.K.Man*f»SMCo-opted MembersMr. K.M. Cheng«*&&&Mr. Harry H.C. LaiDear Dr. Lam,Consultation on Managing Indoor Air QualityThank you for inviting the <strong>Hong</strong> <strong>Kong</strong> Radiation Protection Society tocomment on the Consultation Paper on "Managing Indoor Air Quality" and"Guidance Notes for the Management <strong>of</strong> Indoor Air Quality in Offices and PublicPlaces".We are impressed by the sophistication and details contained in thedocuments about management <strong>of</strong> indoor air quality. Since indoor air quality isrelated to many kinds <strong>of</strong> pollutants, and out <strong>of</strong> all the pollutants, only radon andits progeny are radioactive, we shall only comment on the issue <strong>of</strong> radon and itsprogeny from the radiological protection point <strong>of</strong> view*Radon and its progeny, like other common indoor pollutants, are mainlygenerated indoors for high-rise type buildings and therefore can be removedprimarily by improving ventilation. In this respect, we agree that the generalmanagement for indoor radon should be the same as for the other indoorpollutants. However, unlike the other carcinogenic pollutants, radon and radonprogeny exist everywhere, in workplaces and in dwellings. For this kind <strong>of</strong>chronic exposure, it is advisable to adhere to the ALARA (As Low AsReasonably Achievable) principle.Although many countries and international authorities have adopted 200Bq m" 3 as their radon action level, there are countries that use a lower level, suchas USA adopting 150 Bq irf 3 for both existing and new homes. Since radonaction level has to be decided according to local factors such as geology, buildingdesign, social and economic factors, we would like to recommend the adoption <strong>of</strong>150 Bq m" 3 as the radon action level for future newly built buildings, whetherresidential or non-residential. <strong>The</strong> recommendation is based on the followingreasons.Mr.AndyH.K.LawIMWf±Dr.M.C.Wong

<strong>Hong</strong> <strong>Kong</strong> Radiation Protection Societyc/o Roc/foisotope Unit, <strong>The</strong> <strong>University</strong> <strong>of</strong> <strong>Hong</strong> <strong>Kong</strong>Pokfuhm Road, <strong>Hong</strong> <strong>Kong</strong>Tel: (862) 2859 2547 Fax: {852} 2559 5557mm®Hon. Advisors2-Pr<strong>of</strong>. H.K. ChangPr<strong>of</strong>. Edward K.Y. ChenPr<strong>of</strong>. Y.C. ChengPr<strong>of</strong>. Arthur K.C.UPr<strong>of</strong>. C.K. PoonHon. FollowsOr, Margaret ChanPr<strong>of</strong>. Zi-qlang PanDr. Hector T.G. MaHem. Legal AdvisorMr. Carson WenSlfcWAuditorMr. Charles ChanExecutive CommitteeChairpersonDr.M.Y.W.TsoVice-ChairmanDr. K.Y. Cheung**«* Hon. SecretaryDr. K.M. MaHon. TreasurerDr. J.K.C. LeungMembersMs. Joyce Leung1. We all live and work in crowded space. Simple calculation <strong>of</strong> therequirement for ventilation will show that the ventilation rate, ifmaintained, will be sufficient to reduce the indoor radon concentration tobelow 150 Bqm" 3 .2. By using the results <strong>of</strong> a territory-wide survey <strong>of</strong> indoor radon, we havederived a radon action level by balancing the protection cost (electricitycost for increasing ventilation rates) and the detriment cost due tooverexposure to radon and its progeny. With the continuous growth ineconomy, it is expected that protection cost will be cheaper while thedetriment cost will increase. <strong>The</strong> paper that describes the choice <strong>of</strong> actionlevel is attached for your reference.Indoor radon mainly comes from the concrete <strong>of</strong> the building and theirexhalation rate from the concrete should be more or less the same for differentbuildings. Since the indoor radon concentration is inversely proportional to theventilation rate, it is logical to use the indoor radon concentration as an indicator<strong>of</strong> ventilation rate. By using simple grab samplings or radon sniffer, it will tellwhether the ventilation needs improvement or whether other indoor air pollutantsshould be measured.In addition to the above recommendation, we have noted some mistakesin the document "Guidance Notes for the Management <strong>of</strong> Indoor Air Quality inOffices and Public Places" and they are given below.p33 second last line. Does it mean long term and short term samplers instead <strong>of</strong>passive and active samplers?p.34 line 8. ICRP is not an international standard.Yours sincerely,Dr.C.K.ManCo-opted MembersMr. K.M.ChengMr.Hany.H.C.UiDr.M.Y.WongTsoChairperson,<strong>Hong</strong> <strong>Kong</strong> Radiation Protection SocietyMr. AndyH.lt LawWJWfcfcDr. M.C.WongMYWT/smEnc.

09-SEP-1999 14537 FROM TO 28278Q40 P. 01DEPARTMENT OP HEALTHCHEST SERVICE CENTRAL OFFICEHONGKONG**«« OUR HER: (62) in TBHHONG mm,Td; ($53)25726033isDirector <strong>of</strong> Environmental Protection(Attou: Dr. Alain LAM)Environmental Protection Department33/F, Revenue Tower,5 Gloucester Road,Wanchai, <strong>Hong</strong> <strong>Kong</strong>.Pax: (152)21346627Dear Dr. LAM,Consultation on Managing Indoor Air QualityThank you for your letter dated 3 August 1999 with documents related to the captionedsubject I dunk the Inter-departmental Indoor Air Quality Management Group has done avery good job in making the correct step forward in the control <strong>of</strong> indoor air quality.A few points which I would like to clariiy:(1) Concerning the 3-level IAQ objectives, will there be other levels to describe thesituation as not good/bad?(2) Concerning the certification system, will the owners and management <strong>of</strong> premises needto measure the indoor air quality daily and put up the results for the public'sinformation?Many thanks.Yours sincerely,Dr. CM TarnConsultant Chest Physician i/cOM.11HAII09-SEP-1999 14526 +852 2574 2439 99*TOTftL P.81P.01

10-SEP-1999 17:59 " FROM TO 2S278040 P. 01/01,-OCCUPATIONAL SAFETY & HEALTH COUNCILWE, Chlita Uoiccd Ontf*. 26 tfuMt «o«f .Nor* Kate*. ffeni K*a$.OH FAX: 2739 9779Mail mdfat plftfl/ftf)Planning, Environment & Lands Bureau * Date: 10 Sep 1999Environment Division9/F, Murray BuildingGarden Road, CentralHONGKONG(Attn Dr Alain Lam)Dear Dr Lamn "Manain T?idiir Air ulit Y \ - AI refer to your letter on 3 August 1999. On bebalf <strong>of</strong> the Council, I would like to makesome comments on the captioned paper. *1.It scons thai lifi Govcrxuniat inle^ Alsomany department* aie iavolvod in this I AQ program, it it the right time to establish clw guidelinestpplicable to an trades and occKioai l^pobKc^uUliketos^gddaiictnissiicd to uio fa <strong>of</strong>fices and pMe pla^iiutusny purposes.2. Eivforccjpenr policy<strong>The</strong> implementation <strong>of</strong> the IAQ program calls for the volnmaiy panitipirioA <strong>of</strong> bundingowners/managcmciiL Th£ consultation paper tiay also dlsdose the enfbrcemem policy by the variousdeparatituis in jexusxsil or during the irapleixur*'«4Cioii period.3. IAQ information, centreUis toodtohiveacoiiial sooaree<strong>of</strong> i<strong>of</strong>

19/F., Vocational Ilraining Council Tower, 27 Wood Road, Wanchai, <strong>Hong</strong> <strong>Kong</strong>.®:m^mYour Reference. EP21/L3/20 Vtt v - '_i^ M- - • • «•» ifate " • •"• • • • • '' " •3fc ® W mTelephone No. ., 2836 1915. 0030 me^T- 28380667 8 September 1999Facsimile No.m "•*

•I/ - ' ' . .Comments &a the Consultation Paper^Managing Indoor Air Quality**Over the past two decades, there has been a growing awareness <strong>of</strong> environmentalprotection in <strong>Hong</strong> <strong>Kong</strong>. People are recognising the need to conserve energy and tocombat pollution problems. Ten years ago, the Government released the 1989 White Paperon Pollution. Four years later, the Paper came under its second review, at which time theGovernment recognised the existence <strong>of</strong> indoor air pollution and the potential health risksassociated with it, e.g. Sick Building Syndrome. We are veiy pleased to see that theGovernment is proposing a new programme to tackle the problem.Establishing the Right ApproachMany other cities and countries are experiencing indoor air pollution problems similarto those facing <strong>Hong</strong> <strong>Kong</strong> and a wide range <strong>of</strong> measures have been implemented indifferent parts <strong>of</strong> the world. We believe that the way to improve IAQ should include a totalevaluation process <strong>of</strong> the built environment which involves planning, design, construction,operation and maintenance <strong>of</strong> buildings. In developing a solution for <strong>Hong</strong> <strong>Kong</strong>, theappropriateness and effectiveness <strong>of</strong> the preliminary exercise should be critically evaluatedbefore launching a full-scale programme. In formulating the final plan for an IAQmanagement programme, considerable attention should be given to the comments from thebuilding services and management industries as good IAQ relies heavily on the buildingCervices engineer, building mainten^Manpower RequirementsImplementation <strong>of</strong> the proposed programme mentioned in the Consultation Paperbrings with it a growing need for indoor air quality monitoring activities which in the longrun would require more competent personnelfor the labour-intensive activities in measuringindoor, air pollutants/Section 32 <strong>of</strong> the Consultation Paper mentions that thegovernment wilt invite VTC to provide training. We believe that the Department <strong>of</strong>Applied Science, Institute <strong>of</strong> Vocational Education (Chaiwan), has expertise in monitoringIAQ and providing the training for personnel to perform the monitoring work listed in Table2 <strong>of</strong> the Consultation Paper. This can be in the form <strong>of</strong> a series <strong>of</strong> short courses, <strong>The</strong>Department also <strong>of</strong>fers a Higher Diploma course in Environmental Technology, withinwhich IAQ topics are included. <strong>The</strong> first cohort <strong>of</strong> graduates with exposure to IAQ topicswill be available in 2002.Environmental Technology SectionDepartment <strong>of</strong> Applied Science7 Sept 1999 -/*tV. . . , : *'8Rl*&

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