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8/3/2019 Scheme Brochure Eng 11-2010
1/26
November 2010
Fresh Water Cooling Towers Scheme
for Air Conditioning Systems
8/3/2019 Scheme Brochure Eng 11-2010
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Fresh Water Cooling Towers Scheme or Air Conditioning Systems
Contents
Page
Defnitions
Part1Introduction
1. Background 1
2. TheScheme 3
2.1 Am 3
2.2 CondtonsoPartcpaton 3
2.3 CondtonsorSuspensonorCessaton 4
2.4 Revews 5
2.5 DesgnatedAreas 5
Part2ParticipationProceduresandGuidance
3. StatutoryRequrements 6
4. CodesoPractce 7
5. MnmumRequrementsorRegstratonundertheScheme 8
6. InormatonrequredorApplcaton 9
7. RecordsKeepngdurngOperaton 10
8. GeneralPreamble 13
9. Waterworks 14
10. BuldngWorks 16
11. SewageServcesCharge 17
12. WaterPollutonControl 19
13. ArPollutonControl 1914. NoseControl 19
15. NusanceControl 20
16. OccupatonalSaetyandHealth 20
Part3InormationorEnquiryandApplication
17. Forms 21
18. ProcessChart 21
19. Enqures 22
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Fresh Water Cooling Towers Scheme or Air Conditioning Systems
InthsSchemeBrochure,unlessthecontextotherwsespeces,
coolngtowermeansanydevceor lowerngthetemperatureowaterby
evaporatvecoolngnwhchambentarsncontactwthallngwater,thereby
exchangngheat; drtmeanswaterlostrom the coolngtower aslqud
dropletsoraerosolsentranedntheexhaustar,excludngcondensaton.
Defnitions
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Fresh Water Cooling Towers Scheme or Air Conditioning Systems
1 Background 1 Background
ThePrelmnaryPhaseConsultancyStudyonWderUseoWater-cooledAr
CondtonngSystems(WACS)n Hong Kong was completedn md1999.
Thestudyhas establshed that WACShas greaterenvronmental,economc
andnancalbenetsthanAr-cooledArCondtonngSystems(AACS).
Subsequently,a terrtory-wdemplementatonstudywascompletedn md
2003oracltatngaull-scalemplementatonoWACS.Themplementaton
studyexamnedanddentedareassutableorwderuseoWACSandalso
examnedndetalthenancal,regulatory,landadmnstraton,nrastructural,
envronmentalandhealthssues,ncludngthepreventonoLegonnares
dsease.
Annter-departmentalworknggroupwassetuptolaunchaplotschemeon1
June2000orwderuseoreshwaternevaporatvecoolngtowersnenergy
ecentarcondtonngsystems(thePlotScheme)ndesgnatedareaswhere
exstngwatersupplesandseweragenetworkwouldbeadequateto meetthe
addtonal demand. Althoughbothseawaterandresh watercanbe used
asthecondensngcoolngmeda,thePlotScheme sonlyapplcabletoresh
waterevaporatvecoolngaterconsderngthesourceand capactyoexstng
watersupplynetworks.Theworknggroupcomprsesmembersromtwopolcy
bureauxandsevengovernmentdepartments:
Part1:Introduction
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Fresh Water Cooling Towers Scheme or Air Conditioning Systems
DevelopmentBureau(DEVB)
EnvronmentBureau(ENB)
BuldngsDepartment(BD)
DranageServcesDepartment(DSD)
ElectrcalandMechancalServcesDepartment(EMSD)
DepartmentoHealth(DH)
LandsDepartment(LandsD)
PlannngDepartment(PlanD)
WaterSupplesDepartment(WSD)
Thentermrevewsn2005and2007othePlotSchemehaverevealedthe
Schemehasbeenapromsngwaytoascertantheenergyecencynar
condtonngsystemsornewandexstngnon-domestcbuldngswthoutposng
adversempactsontheexstngwatersupplyandseweragenrastructures. As
aresult,wthsupportothepolcybureauxconcerned,thePlotSchemehas
operatedasastandngschemerom1June2008,andrenamedasSchemeor
WderUseoFreshWaternEvaporatveCoolngTowersorEnergy-ecentAr
CondtonngSystems(orFreshWaterCoolngTowersSchemensmpleterm).
Theregulatory andnsttutonal rameworkotheSchemebascallyremaned
unchangedexceptsomeupdatesntheoperatonalandvaldatonrequrements.
Aurtherrevewwasalsoconductedn2010tostreamlnetheapplcaton
proceduresandrequrementsorjonngtheScheme.TheSchemeBrochures
updatedaccordngly.
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Fresh Water Cooling Towers Scheme or Air Conditioning Systems
2 The Scheme2 The Scheme
2.1 Aim
TheSchemeamsto:
(a) promoteenergy-ecentwater-cooledarcondtonngsystems;
(b) montortheaddtonalwaterdemand;
(c) montorthequanttyandqualtyobleed-oefuentdschargerom
thesystems;
(d) montorthehealthandenvronmentaleectsarsngromthe
systems;and
(e) compledataorormulatngandupdatngplanstopromotewater-
cooledarcondtonngsystemsnHongKong.
2.2 Conditions o Participation
Thsschemeapplestoallnon-domestctypesonewandexstngbuldngs
wthnthedesgnatedareas(seepara.2.5below).AllPropertyDevelopers,
Landlords,PropertyManagementAgents,DesgnersandSystemOperators
are welcome toapplyortheuse oreshwaterorar-condtonng
nstallatonsntherbuldngswthnthedesgnatedareas.Applcatonsor
buldngsnotwthnthedesgnatedareasarealsowelcomedandwllbe
consderedonacase-by-casebassnconsultatonwthWSDonadequacy
oreshwater supply.Applcatonshallbe submtted together wth the
requrednormatonasstpulatednParagraph6totheauthortes
concerned.
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Fresh Water Cooling Towers Scheme or Air Conditioning Systems
Partcpantsshallcomplywthallrelevantstatutoryregulatonsas wellas
mnmumrequrementsasladdownnPart2orjonngtheScheme.
Besdes,thepartcpantsarerecommendedtoadoptthebestpractces
relatedtothedesgn,operatonandmantenanceocoolngtowersasper
thegudelnesandrecommendatonsgvennrelevantcodesopractces.
Alltheserequrementsaresettoachevebetterenergyecency,to
protecttheenvronmentandtosaeguardthepublchealthandsaety
whleusngreshwaterorevaporatvecoolng.
2.3 Conditions or Suspension or Cessation
ThoughtheSchemesamedtobeastandngscheme,tcanstllbe
suspendedorceaseduponobtanngtheendorsementromtheWorkng
Group(herenreerredtoWorkngGroupmentonednParagraph1)
undertheollowngcondtons:
(a) Waterratonngsmplementedntheterrtory,or
(b) AnoutbreakoLegonnaresdseasentheterrtory,or
(c) Waterresourcesare antcpatedto benadequateorwater supply
nrastructurecannotcopewththedemandbywater-cooledar
condtonngsystems.
ItheSchemessuspendedorceasedundertheabovecondtons,allnew
applcatonswll notbeprocessed. Thewater supplyto theregstered
coolngtowernstallatonswllbesubjecttoregulatonbytheWater
Authorty. Thetradewll normallybe noted notlessthan 6months
nadvance,unlessthesuspensonor cessaton shouldbe executed
mmedatelyduetosomeseverestuatons.
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Fresh Water Cooling Towers Scheme or Air Conditioning Systems
2.4 Reviews
Thecondtonsandrequrementsnthebrochureorregstratono
coolngtowersundertheSchemewllbesubjecttorevewbythe
InterdepartmentalWorkngGroupotheSchemesoas toacltatethe
promotono theuseo water-cooledarcondtonngsystemsn Hong
Kong.
2.5 Designated Areas
ThedesgnatedareasorapplcatonorjonngtheSchemearedelneatednthelatestlocatonplanswhchcanbedownloadedatEMSDwebpage:
(http://www.emsd.gov.hk/emsd/eng/pee/pswct_pub.shtml).
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Fresh Water Cooling Towers Scheme or Air Conditioning Systems
Thspartdescrbesthestatutoryrequrements,normatonrequredand
processesnvolvedwthvarousgovernmentdepartmentsntheapplcatonorjonngtheSchemeorusngreshwaterorcoolngtowersorarcondtonng
systems.
3 Statutory Requirements3 Statutory Requirements
Ingeneral,theapplcantsshallensurethatthercoolngtowerscomply
wth,butnotlmtedto,theollowngOrdnances,Objectves,andTechncal
Memorandum:
WaterworksOrdnance(WWO)(Cap.102)
BuldngsOrdnance(BO)(Cap.123)
SewageServcesOrdnance(SSO)(Cap.463)
WaterPollutonControlOrdnance(WPCO)(Cap.358)
ArPollutonControlOrdnance(APCO)(Cap.311)
NoseControlOrdnance(NCO)(Cap.400)
OccupatonalSaetyandHealthOrdnance(OSHO)(Cap.509)
PublcHealthandMuncpalServcesOrdnance(PHMSO)(Cap.132)
TechncalMemorandumonStandardsorEfuentDschargedntoDranage
andSewerageSystem,InlandandCoastalWaters
TechncalMemorandumortheAssessmentoNoseromPlacesotherthan
DomestcPremses,PublcPlacesorConstructonStes
WSDsWaterQualtyObjectveso SeaWater orFlushngSupply(at
Dstrbuton)
Part2:ParticipationProceduresandGuidance
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Fresh Water Cooling Towers Scheme or Air Conditioning Systems
Applcantsareadvsedtocheckotherrelevantstatutoryrequrementsandseek
theproessonaladvceromaLcensedPlumber(LP),anAuthorzedPerson(AP)
anda RegsteredProessonalEngneer(RPE)o buldngservcesormechancal
engneerngdscplnewhentheyhavequeresntheproceduresandthe
standardoworksrequred.
4 Codes o Practice4 Codes o Practice
Besdesthe above statutoryrequrements, thepartcpantso theScheme
arerequredtoadoptthebestpractcesrelatedtothedesgn,operatonand
mantenanceocoolngtowersaspergudelnesandrecommendatonsgvenn
theollowngcodesopractce:
CodeoPractceorPreventonoLegonnaresDsease2007(CoP(PLD))
CodeoPractceorWater-cooledArCondtonngSystems(CoP(WACS)):
Part1,Part2andPart3
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Fresh Water Cooling Towers Scheme or Air Conditioning Systems
5 Minimum Requirements or Registration under the5 Minimum Requirements or Registration under the
SchemeScheme
ForregstratonocoolngtowernstallatonsundertheScheme,thepartcpant
shallmeettheollowngmnmumrequrementsorthercoolngtowers:
(a) Coolngtowersshallbedstantrom:
() thesurroundngarntakesandexhaustsandoperablewndows,
otherthanthosestatedn()below,wthmnmum7.5mhorzontal
separatonngeneral1;
() or thecoolng towerwthn 7.5mromtsown buldngaade
boundary,arntakesandexhaustsandoperablewndowsonts
vertcalbuldngaadebymnmum7.5mbelowor20mabove;and
() pedestranthoroughareandareaopublcaccessbymnmum7.5m1.
(b) Coolngtowersshallbeprovdedwtheectvedrtelmnators(wthdrt
emssonnotmorethan0.005%omaxmumdesgnwatercrculaton
rate)thatmnmzetheormatonandreleaseodrt 2.
(c) Coolngtowersshallbeprovdedwtheectvewatertreatmentequpment
andbleed-odevce tocontrolbacteralgrowth.Bleed-owaterrom
coolngtowersshallbedschargedtoafushngtank(vaabreaktank
applcable)andreusedorfushngpurpose 3asaraspractcable.
(d) Deadlegsshallbemnmzedtoavodstagnantwaterasaraspractcable
nthecoolngwatercrculatonppeworksorthecoolngtower,and,
whereunavodable,purgevalvesshouldbeprovdedtothedeadlegsor
regulardranng.
1 Re.CoP(WACS)Pt.1s.4.1.3and4.1.42 Re.CoP(WACS)Pt.1s.3.6
3 Thsarrangementstomnmzetheburdenoaddtonaleluenttotheseweragesystems.
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Fresh Water Cooling Towers Scheme or Air Conditioning Systems
(e) Coolngtowersshallbeprovdedwthadequateandsaeaccesstoallow
orthemantenance,nspectonandwatersamplngrequredunderthe
Scheme.
() Coolngtowersshallbethoroughlycleaned,desludgedanddsnectedat
leastonceevery6months 4.
(g) Coolngtowers shallbemantaned to ensurethat the coolngtowers
have()aLegonellaBacteraCount(LBC)thatsbelow10cu/ml,and()
aHeterotrophcColonyCount(HCC)thatsbelow100,000cu/ml 5.The
ownersshallarrangeorwatersamplngtestsorthecoolngtowers()at
leastonceevery3monthsorLBC;and()atleastonceamonthorHCC.
(h) Rskmanagementplan 6(orwatersaetyplan 7)shallbeprovdedor
coolngtowerssystemstobenstalledatsuchacltesasstpulatedn
secton7otheCoP(WACS):Part1.
6 Inormation Required or Application6 Inormation Required or Application
6.1 Attheearlydesgnstageoneworreplacementcoolngtowernstallaton,
applcants may provdental normatonas requredn theapplcaton
orm(FormCT1A)orprelmnaryassessmentandacceptancenprncple
otherapplcaton.
6.2 Beorecommencngtheplumbngworksorcoolngtower(s)nstallaton
andapplyngtoWSDorpermssontoproceedwththeplumbngworks,
theapplcantsshouldsubmtaNotceoCommencementoCoolng
TowerInstallatonWork(FormCT1B)togetherwthothernstallaton
detalsnFormCT4.
4 Re.CoP(WACS)Pt.2s.3.4.1
5 Re.CoP(WACS)Pt.2s.2.5.36 Re.s7oCoP(WACS):Pt1
7 Re.s4.1oCoP(PLD),2007
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Fresh Water Cooling Towers Scheme or Air Conditioning Systems
7 Records Keeping during Operation7 Records Keeping during Operation
7.1 Records on operational conditions
Ownersocompletedcoolngtower(s)nstallatonsshouldmontor,as
wellas,properlyoperateandmantanthecondtonandperormance
othernstallatons. Theyarerequredto keeprecordson theollowng
normaton (va FormEMSDEECT3) onmonthlybassuntl the coolng
towersaredsmantledandputoutoservce:
(a) Condtonoeachcoolngtowershellandtssupportngramework;
(b) Dalyoperatontme(s)andmonthlysamplngdate;
(c) Energyconsumptonorallwater-sdeequpmentnmonthlynterval
othewater-cooledarcondtonngsystem(s);
(d) Totalwaterconsumptonvolumenmonthlyntervalothesystem(s);
(e) Totalefuentdschargevolumenmonthlyntervalothesystem(s);
() Quarterlysamplngandtestngountreated andtreatedbleed-o
waterromthecoolngtowernstallatonbylaboratoryaccredted
underHongKongLaboratoryAccredtatonSchemeusng
accredtedmethodswhereverapplcablenrespectotheollowng
parameters8:
Colour(H.U.),
Turbdty(N.T.U.),
ThresholdOdourNo.(T.O.N.),
AmmonacalN,
SuspendedSolds(SS),
DssolvedOxygen(DO),
8 Theparameters,otherthanresdualbocdes/nhbtors,aremontoredormeetngWSDsWaterQualtyObjectvesoSeaWaterorFlushngSupply(atDstrbuton)
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Fresh Water Cooling Towers Scheme or Air Conditioning Systems
5-DayBochemcalOxygenDemand(BOD5),
SynthetcDetergents,
Resdualbocdes/nhbtors,and
E.Col/100mL(ECL).
(g) Monthlysamplng and testngo the coolng waterothecoolng
towernstallatonnrespectotheollowngparameters:
Totaldssolvedsolds(TDS),
Conductvty,
Calcumhardness,
Totalalkalnty,
pH,
Temperature,
Resdualbocde(s),and
Resdualcorroson/scalenhbtngchemcal(s).
(h) Monthlysamplng and testngo the coolng waterothecoolng
towernstallatonorHeterotrophcColonyCount(HCC);
() Quarterlysamplng and testng(orwhenever requredbythe
approvngauthortysuchasatercommssonngormajoralteraton)
ocoolngwaterothecoolngtowernstallatonorLegonellaBacteraCount(comprsngcategoresoLegonellapneumophla
serogroup1,Legonellapneumophlaserogroup2to14,andother
specesoLegonella)orvaldatonotheeectvenessothe
preventvemeasuresaganstthegrowthoLegonella;and
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Fresh Water Cooling Towers Scheme or Air Conditioning Systems
(j) MantenancerecordsoeachcoolngtowerasstpulatednSecton7
otheCodeoPractceorPreventonoLegonnaresDsease2007
andAppendx2EoPart2otheCodeoPractceorWater-cooled
ArCondtonngSystems.
7.2 TheownersshallmakeavalablesuchrecordsornspectonbytheEMSDs
ocerswhenrequested.
7.3 Annual Audit Report
Theownersshallcommssonanndependentandcompetentaudtorto
conductanannualaudtorthercoolngtowersystemsnaccordance
wth Secton4.3o Part 2o theCodeoPractce or Water-cooledAr
CondtonngSystems. Theyshallsubmttheaudtreportonan annual
bassbeoreeachyearendtoEMSDdurngtheservceleothecoolng
towersystems.
7.4 Notifcation required during operation
7.4.1ChangesoInstallatonDetals
TheownersshouldnotyEMSD,assoonasanykeychangeso
nstallatondetalseected,wthFormEMSDEECT4.
7.4.2ChangeoOwnershpoCoolngTowers
Whentranseronstallatonownershpoccurs,theexstngowners
andnewownersoapprovedcoolngtower(s)nstallatonshall
completethenotcatonFormEMSDEECT5andsubmttoEMSD
orupdateorecords.
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Fresh Water Cooling Towers Scheme or Air Conditioning Systems
8 General Preamble8 General Preamble
8.1 Its recommended that theapplcants shouldapponta Regstered
ProessonalEngneerobuldngservcesormechancalengneerng
dscplneswellnadvanceoradvcentheproperdesgn,nstallaton,
operatonandmantenanceocoolngtowers.
8.2 ProrapprovalandconsentshallbeobtanedromtheBuldngAuthorty
toconstructthesupportngrameworkorthecoolngtowers.
8.3 Anycoolngtowershouldnotbeplacedtoprotrudebeyondtheboundary
othelot.
8.4 Incasecoolngtowersortherdschargeoutletsareproposedtobe
nstalledatpodumfoorandsurroundedbyexstngproxmateresdental
buldngblocksonthepodum,theapplcantshouldnormand/orconsult
therelevantresdentsassocaton oralke, any,about theproposed
nstallatonnthentalprojectdesgnstage.
8.5 The bleed-o waterromthecoolngtowershall bedschargedtothe
lushngtank,(vaabreaktankapplcable),andreusedorlushng
purpose.Thsarrangementstomnmzetheburdenoaddtonalefuent
totheseweragesystems.
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Fresh Water Cooling Towers Scheme or Air Conditioning Systems
8.6 Upon completono the coolngtowernstallaton,theowners should
notyEMSDothecompletonvaFormEMSDEECT2B(orcompletono
thenstallatonnwhole)orFormEMSDEECT2A(orphasedcompleton)
asthecasemaybe.TheormsshouldbesgnedbyaRegstered
ProessonalEngneerobuldngservcesormechancalengneerng
dscplnetocertythatthecoolngtowernstallatonhasbeennstalledn
accordancewththerequrementsstpulatednthsSchemebrochure.
8.7 TheownershouldallowEMSDsauthorzedocersorrepresentatvesto
enterthepremsestonspectthecoolngtowersystems,andtakewater
samplesortestngnecessaryorvaldatonooperatonalcondtons.
8.8 AllormscanbedownloadedatEMSDwebpage:(http://www.emsd.gov.
hk/emsd/eng/pee/pswct_app.shtml).
9 Waterworks9 Waterworks
9.1 Prortoanysubmssonoproposalornewplumbngnstallatonsor
alteratontoexstng plumbngnstallatonsormanswater suppleso
coolngtowers,theapplcantshallobtanromtheWaterAuthorty(WA)
suchnormatonwhchsrelevantastothedesgnotheplumbngworks.
TheapplcantshallsubmttoWAtheplumbngproposalandconsumershp
undertakngbytheFormWWO542.
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Fresh Water Cooling Towers Scheme or Air Conditioning Systems
9.2 Uponrecept otheplumbngproposalto use manswaterorcoolng
towers,theWaterAuthortywllreplytotheapplcantnwrtngwthn
20workngdaysnormnghm whethersuchproposalsacceptableor
not.Undernormalcrcumstance,separatemeterng,thusseparatewater
account, orthskndo supplys requred.Theapplcants remnded
thatabreaktankorretanngbleed-owaterromthecoolngtowers
orreusennternalfushngsnormallyrequred.Thebreaktankshallbe
desgnedandconstructedsmlartothatasstatednClause8.14otheHK
WaterworksStandardRequrementsorPlumbngInstallatonnBuldngs.
Anysubsequentalteraton,revsonand modcaton othe approvedproposalshouldbesubmttedtotheWaterAuthortyorapproval.
9.3 Prortocommencementotheplumbngworksormanswatersuppleso
coolngtowersshownonanyapprovedplumbngproposal,theapplcant
shallsubmttoWAbyLcensedPlumbertheFormWWO46(PartsIand
II).WAwllreturntheFormWWO46(PartIII)totheapplcantorwhether
thepermssontocommenceplumbngworkssgranted.Theapprovalo
provdngmeteredwatersupplywllnotconeranylegalmplcatonon
structuralstatusothecoolngtower(s)norcarryanyeectoprecludng
actonbengtakennrespectothestructurebyanotherauthorty.As
thebuldngworksorthecoolngtower(s)sunderthejursdctonothe
BuldngAuthorty,t spremsesownersresponsbltyto obtanrelevant
consentromtheBuldngAuthortyortheseworks.Faluretodosomay
resultnremovalothesecoolngtowersbytheBuldngAuthorty.
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Fresh Water Cooling Towers Scheme or Air Conditioning Systems
9.4 Uponcompletonothecoolngtowernstallaton,theownershouldsubmt
FormEMSDEECT2Btogetherwthastenspectonreportcompletedby
anRPEtoEMSD.EMSDwllnotytheapplcantorwhetherthecoolng
towernstallatonsacceptedunderthsScheme.Theapplcantandthe
lcensedplumbershouldapplytoWAornspectonoplumbngwork
bytheFormWWO46(PartIV).WAwllnotytheapplcantbytheForm
WWO46(PartV)orwhethertheplumbng worksupto make-uptank
arecompletedsatsactorly.Theapplcantshouldensurethatallworks
other thanwaterworks are completed satsactorlyandacceptableto
EMSDandtheBuldngAuthorty.Incasephasedcompletonorcoolngtower(s)nstallatonsrequred,theapplcantshallsubmtFormEMSD
EECT2Atogetherwthaste nspectonreportcompletedbyan RPEto
EMSD.EMSDwllnotytheapplcantwhetherthephasedcompletono
thecoolngtowernstallatonsacceptedunderthsScheme.Theapplcant
shouldrequesttheWAorwatersupplyorphasedcompleton.WA
wllarrangeconcessonarywatersupplytothecoolngtowernstallaton
underphasedcompletonprovdedthattheplumbngworksconcerned
arecompletedsatsactorly.TheapplcantshouldnormEMSDwhenthe
wholenstallatonscompleted.
10 Building Works 10 Building Works
10.1 Anypersonntendngto carry outbuldngworkssuch assupportng
rameworksorcoolngtowers srequredundertheBuldngsOrdnance
toappontanAuthorsedPersontoprepareplansortheapprovaland
consento theBuldngAuthortybeore thecommencemento any
works. Uponcompletonothe buldngworks,theAuthorsedPerson
srequredto certy that thebuldngworkshavebeencarredoutn
accordancewththeapprovedbuldngplans.
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Fresh Water Cooling Towers Scheme or Air Conditioning Systems
10.2 ItsstronglyrecommendedthattheadvceoanAuthorsedPersonshould
besoughtwellnadvance.AdrectoryoAuthorsedPersonregstered
undertheBuldngsOrdnancesavalablentheBuldngsDepartmentor
vewng.
10.3 Buldng workscarredoutwthoutprorapprovalandconsentromthe
BuldngAuthortyareunauthorzed.TheBuldngAuthortymaytake
enorcementactonsunderSectons24and40otheBuldngsOrdnance
torequrethedemoltonosuchbuldngworks;and/ortoprosecutethe
oendernthecourt.
[Note:Alternatveproceduresorapprovalomnorworksmaybeadopted
undertheMnorWorksControlSystem(MWCS)whchtakeseect
rom31.12.2010.EnquresonMWCScanbemadetotheBuldngs
Department.]
11 Sewage Services Charge 11 Sewage Services Charge
11.1 Accordngto theSewageServces Ordnance,all wateraccount holders
whose premsesareconnected, whetherdrectlyor ndrectly, toa
communaldranoracommunalsewerarelabletopaysewagecharge(SC),
exceptorwatersuppledspeccallyorlushngpurposes.Thewater
consumedbytheWACSssubjecttoSCandtheamountscalculated
basedontheprescrbedSCratemultpledbythetotalwaterconsumpton
volume.
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Fresh Water Cooling Towers Scheme or Air Conditioning Systems
11.2 Itheconsumeroragent,ascasemaybe,consdersthatthevolumeo
wastewaterbengdschargedtothepublcsewerageordranagesystems
(ncludngthevolumeobleed-owaterromcoolngtowersdscharged
tolushngtank)snotmorethan85%othetotalwaterconsumpton
volume,theconsumercanapplytotheDranageAuthortyorareducton
oSCbasedonarevsononthedschargeactor.Hewllberequredto
provdenormatononthevolumeso waterconsumedandwastewater
dschargednhsapplcaton.Fortheprovsonosuchnormaton,
twllbepreerableortheconsumeroragenttonstallsub-metersto
measurethevolumeowastewaterdschargedatthetermnaldranageoutletothepremses.Itheconsumeroragenthastechncaldcultes
nnstallngthesesub-meters,heshouldexplannhsapplcatononthe
stuatonandprovdealternatvenormatonsucentortheDranage
Authortytoassesshsapplcaton.
11.3 Forthepurposeoveryngthenormatonthatsneededndetermnng
theactortobechargedortheSC,theDranageAuthortymay,
deemednecessary,enterthepremsesoaconsumeratallreasonable
tmesorstenspecton.
11.4 Thenormaton collecteddurng handlngotheapplcatonmaybe
dsclosedtootherGovernmentdepartmentsandtherauthorzedagences,
applcable,orlawenorcementpurposesshouldtbedeemednecessary.
Also,suchnormatonmaybedsclosedtotheElectrcal&Mechancal
ServcesDepartmentsolelytoacltatetherrevewotherequrementsor
theScheme.
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19
Fresh Water Cooling Towers Scheme or Air Conditioning Systems
12 Water Pollution Control 12 Water Pollution Control
AlldschargescontanngpollutngmattermustbelcensedundertheWater
PollutonControlOrdnance(WPCO).AnycontraventontotheWPCOwll
besubjecttoenorcementacton.Thestandardsormostlkelycontamnants
arespecedntheTechncalMemorandumandtheEnvronmentalProtecton
Departmentwllgenerallyollowthese.Forbocdeshoweverthelcense
standardsneedtobedetermnedonacasebycasebass.Prospectvedschargers
shouldprovdetheEnvronmentalProtectonDepartmentwthadvancedetals
othebocdestheyntendtouseandtheproposedmethodotherapplcaton,
thenatureandlocatonotheproposeddscharge.TheEnvronmentalProtecton
Departmentwllthenspecycondtonsaccordngly.
13 Air Pollution Control 13 Air Pollution Control
Theemssons,ncludngwatermst,romcoolngtowerswouldbeactonable
undertheArPollutonControlOrdnance(APCO)theemssoncauses
anusanceandtheEnvronmentalProtectonDepartmentwouldssuean
abatementnotcewherenecessary.Themostpractcalsolutonortacklng
anytoweroggngstolocatethetowerwherevsbleplumewllnotbe
objectonable.
14 Noise Control 14 Noise Control
Noseromanyevaporatvecoolngtowersscontrolledundersecton13o
theNoseControlOrdnance(NCO). Shouldthe nose emanatedthererom
exceedtherelevantcrterastpulatedntheTechncalMemorandumorthe
Assessmento Nose romPlacesotherthanDomestcPremses,PublcPlaces
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20
Fresh Water Cooling Towers Scheme or Air Conditioning Systems
orConstructonStes,theEnvronmentalProtectonDepartmentwouldssuea
NoseAbatementNotcerequrngtheNoseProducertorectytheproblemand
tocomplywththestatutorynosestandard.
15 Nuisance Control 15 Nuisance Control
Theemssonoarorthedschargeowaterromcoolngtowersnany
premseswouldbeactonableunderPHMSOtheemssoncausesanusance.
TheAuthortywouldssueaNusanceNotcetothenusanceproducertorequre
hmtoabatethenusancewthntheperodspecednthenotce,andthe
notcemay,theAuthortythnkst,specyanyworkstobeexecutedorthat
purpose.
16 Occupational Saety and Health 16 Occupational Saety and Health
UndertheGeneralDutesoOSHO,employersoroccupersmustensure
thatsaetyandhealthatworkoallemployees,orexamplebyprovdngor
mantannga goodworkenvronment,andprovdngnormaton,nstructon,
tranngandsupervsontotheemployees.In theoperatonoarcoolngplant
untorventlatonoabuldng,attentonshouldbemadetoavodorreduce
anyhealthrsksarsngromtheassocatedworkactvtesortheworkng
envronment,suchasthersksoLegonnaresdseasesoccurredamong
employeesandoverexposureto chemcals usedortreatment othecoolng
water.Goodmantenancesmportanttoavodcontamnatonotheventlaton
system.Knowledgeonhandlngchemcalscouldreducehealthrskstomnmal.
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Form No. Usage
EMSDEECT1A ApplcatonorPartcpaton(PrelmnaryAssessment)
EMSDEECT1B NotceoCommencementoCoolngTowerInstallaton
Work
EMSDEECT2A NotcatonoPhasedCompletonoCoolngTower
Installaton
EMSDEECT2B NotcatonoCompletonoCoolngTower
Installaton(s)
EMSDEECT3 RecordsoOperatonalInormaton
EMSDEECT4 CoolngTowerInstallatonDetals
EMSDEECT5 NotcatonoChangeoOwnershporEvaporatve
CoolngTowerInstallaton(s)
21
Fresh Water Cooling Towers Scheme or Air Conditioning Systems
Part3:InormationorEnquiryandApplication
17 Forms 17 Forms
T h e u p d a t e d p r o o rm a o r m s o a p p l c at o n a n d r e g st r a t on
lstedhereundercanbedownloadedatEMSDwebpage:
(http://www.emsd.gov.hk/emsd/eng/pee/pswct_app.shtml).
18 Process Charts 18 Process Charts
ThelatestprocesschartoapplcatoncanbedownloadedatEMSDwebpage:
(http://www.emsd.gov.hk/emsd/eng/pee/pswct_app.shtml).
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Electrical & Mechanical Services
Department
(energyecencyandcoolngtowers)
EnergyEcencyOce
7/FElectrcal&MechancalServcesDepartment,
3KaShngStreet,KowloonBay,
Kowloon,HongKong.
Webste:http://www.emsd.gov.hk
Emal:no@emsd.gov.hk
Tel:37576156
Tel:1823
Fax:28906081
Water Supplies Department
(watersupply,conservatonandcharge)
HeadquartersOce
43/F,ImmgratonTower,7GloucesterRoad,
WanCha,HongKong.
Webste:http://www.wsd.gov.hk
Emal:wsdno@wsd.gov.hk
Tel:28245000
Fax:28027333
Buildings Department
(buldngworksandsupportngrameworks
orcoolngtowers)
12/F,PoneerBuldng,750NathanRoad,
Mongkok,Kowloon.
Webste:http://www.bd.gov.hk
Emal:enqury@bd.gov.hk
Tel:26261616
Fax:25374992
Environmental Protection Department
(arpollutoncontrol,nosepollutoncontrol,and
waterpollutoncontrolaswellassewagetreatment
anddsposalobleed-owaterromcoolngtowers)
33/F,RevenueTower,5GloucesterRoad,
WanCha,HongKong.
Webste:http://www.epd.gov.hk
Emal:enqury@epd.gov.hk
Tel/Fax:28383111(CustomerServce
Centre)
Drainage Services Department
(sewageservcescharge)
CustomerServcesSecton
G/F,WesternMagstracy,
2APokFuLamRoad,HongKong
Webste:http://www.dsd.gov.hk
Emal:enqury@dsd.gov.hk
Tel:28349432
Fax:25745645
22
Fresh Water Cooling Towers Scheme or Air Conditioning Systems
19 Enquiries 19 Enquiries
FormorenormatonabouttheScheme,pleasecontacttheollowng
departmentsdurngocehourorrelevantnormaton:
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3
EnergyEfciencyOfceElectricalandMechanicalServicesDepartment3KaShngStreet,Kowloon,HongKong
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