Design Risk Assessment associated with Code of Practice for Water Infrastructure

Transcription

1 Irish Watr Connction and Dvlopr Srvics Dsign Risk Assssmnt associatd with Cod of Practic for Watr Infrastructur Documnt Numbr: IW-CDS April 2018 (Rvision 1)

2 Background Tchnical Documntation has bn dvlopd by Irish Watr s Connction and Dvlopr Srvics (CDS) which outlins Irish Watr s rquirmnts for watr srvics infrastructur within dvlopmnts. Th Tchnical Documntation compriss Cods of Practic and Standard Dtails. Ths provid Irish Watr s rquirmnts to dvloprs in th provision of watr and wastwatr infrastructur that is to b installd by Slf-Lay mthods in dvlopmnts, and that will b connctd to Irish Watr s ntworks and subsquntly vstd in Irish watr. Th Tchnical Documntation outlins dsign and construction rquirmnts to nsur consistncy in th provision of matrials, quipmnt, workmanship, tc. Thy will also provid th basis for dvloprs dtaild dsign proposals for watr and wastwatr infrastructur, lading to th provision of infrastructur that is suitabl for connction to Irish Watr s ntworks and asy opration and maintnanc. Th Tchnical Documnts ar basd on bst practic within th watr industry. Thy tak account of th xprinc of Local Authoritis in th provision of ths srvics to nw dvlopmnts. Th Standard Dtails for Watr (IW-CDS ) and its associatd Dsign Risk Assssmnt (IW-CDS ) ar availabl at Th Cod of Practic for Watr Infrastructur (IW- CDS ) is availabl also at This Dsign Risk Assssmnt (DRA) (IW CDS ) has bn prpard to outlin th rsidual halth and safty rsponsibilitis of dvloprs and thir dsignrs/contractors in th provision of infrastructur in accordanc with th Cod of Practic for Watr Infrastructur (IW-CDS ). Th rsidual risks outlind hrin shall b takn into account in th dtaild dsign of watr infrastructur. Dsign Risk Assssmnt for th Cod of Practic for Watr Infrastructur Th Cod of Practic for Watr Infrastructur dscribs accptabl rquirmnts and provids guidanc on th minimum standards that ar rquird by Irish Watr for th provision of watr pips and rlatd infrastructur in Slf-Lay dvlopmnts which ar to b connctd to th Irish Watr Ntwork. Th watr supply pips and rlatd infrastructur to b put in plac within Slf-Lay dvlopmnts shall comply fully with th Cod of Practic for Watr Infrastructur. Th Cod of Practic for Watr Infrastructur shall b usd in conjunction with this Dsign Risk Assssmnt which idntifis th risks that dsignrs shall tak into account in th dtaild dsign of th watr pips and rlatd infrastructur. Ultimat rsponsib (including, but not limitd to, any losss, costs, dmands, damags, actions, xpnss, nglignc and claims) for th dtaild dsign, construction and provision of such pips and rlatd infrastructur shall rst ntirly with th Dvlopr, his/hr Dsignr(s), Contractor(s) or othr rlatd partis. Irish Watr assums no rsponsib for and givs no guarants, undrtakings or warrantis in rlation to th pips and rlatd infrastructur to b providd in accordanc with th Cod of Practic for Watr Infrastructur. Rvision Rason for Rvision Approvd By Issu Dat 0 Initial Issu T. O'Connor 18/04/ Updatd for Cod of Practic Rv. 1 Dc T. O'Connor 23/04/2018

3 Irish Watr Connction and Dvlopr Srvics Dsign Risk Assssmnt associatd with Cod of Practic for Watr Infrastructur

4 Activity Rlatd Hazard Who is at Risk? Existing Control Masurs qunc Risk Ranking qunc Risk Ranking Entr th Activity Entr th hazard List prsons or groups at risk Giv dtails of xisting control masurs in plac 1-5 (slct from list) 1-5 (slct from list) Prob. x q. Low, Mdium or Giv dtails of additional control masurs proposd WATER CODE OF PRACTICE 0 0 #N/A Watr Supply Works Contamination of Watr Th Sction 1.5 Protction of Watr Quality Supplis Th Customr undrtaking th Works shall: adhr to all appropriat hygin procdurs to nsur that th infrastructur installd is fit for us as watr supply works for th dlivry of wholsom or potabl watr, fit for human consumption, whr an mployr is awar of any prson mployd on th Works known to hav a watrborn disas or gastric disordr, th mploy shall immdiatly cas involvmnt in th installation of th Works and shall not rturn until grantd a mdical claranc; nsur that all matrials in contact with watr intndd for human consumption shall achiv complianc with Statutory Instrumnt 122 of 2014, Europan Union (Drinking Watr) Rgulations 2014 and shall b: (i) includd in th latst List of Approvd Products for us in Watr Supply in th Unitd Kingdom publishd by th Drinking Watr Inspctorat (DWI) for England and Wals. Documntary vidnc that th substanc or product has bn spcifically approvd undr th DWI systm, or quivalnt approval systm shall b providd to Irish Watr for accptanc; or (ii) listd in th currnt dition of th Watr Fittings and Matrials Dirctory publishd by th Watr Rgulations Advisory Schm (WRAS). To dmonstrat complianc undr this schm, a lttr from WRAS shall b providd outlining th scop of th approval. nsur that pipwork, matrials, fittings and installations usd in connction with th Distribution Systm and us of watr within th Curtilag of th prmiss should also b suitabl for convyanc of watr fit for human consumption; nsur that th watr Distribution Systm has bn disinfctd, prssur tstd and watr sampls takn and th rsults of which hav indicatd that th Main is suitabl for convying watr intndd for human consumption. Installation, tsting and commissioning (flushing, claning, disinfction, scouring, tc.) of th Works shall b carrid out and bactriological tsts undrtakn prior to connction to th Irish Watr s Ntwork. If a watr sampl takn prior to th final connction dos not mt th paramtric standards laid down in th Drinking Watr Rgulations, a nw sampl shall b takn and tstd. A connction shall not b providd until th bactriological tsts ar satisfactory. If th connction is not mad within 14 calndar days of th sampl dat which yildd a satisfactory rsult, a nw sampl shall b takn and tstd and th disinfction procss rpatd, if rquird. Srvic Connctions shall only b mad onc th supply pipwork has bn confirmd to hav passd th sampling tsts indicating complianc with Statutory Instrumnt 122 of 2014, Europan Union Drinking Watr Rgulations 2014 (th DWRs) Mdium and may rquir it's amndmnt if dmd IW CDS Fild Enginrs will also vt th final installd 1-5 (slct from list) 1-5 (slct from list) Prob. x q. Low, Mdium, Carrying out works on watr supply infrastructur Contamination of Watr Supplis Th Sction 1.5 Protction of Watr Quality During construction, th Customr and his contractor/sub-contractor shall b mindful that any contamination of a watr supply could crat dangrs to public halth and in this rspct vry prcaution shall b takn to prvnt contamination. Th Customr and his contractor/sub-contractor shall: arrang for all prsonnl oprating in and around th dvlopmnt to b scrnd by a mdical fac for all watr transmittabl disass and maintain rcords of ths scrnings, no prson shall b allowd to commnc work in or around th Watr Main installation works until scrnings ar compltd and th succssful rsults, as issud by a mdical advisor, ar providd to Irish Watr. nsur that oprativs, whil working on potabl watr supply systms, hav compltd a rcognisd Drinking Watr Supply Hygin Cours. (Th Local Authoritis Srvics National Training Group (LASNTG), Watr Srvics Training Group offrs a training cours, lading to a crtificat award, on drinking watr supply hygin for watr srvics prsonnl & contractor staff who work with watr srvics.) nsur that staff working on watr supply infrastructur hav a copy of Drinking Watr Supply Hygin Cours crtificat at all tims whil on th sit installing or rpairing th watr mains and prsnt it to Irish Watr prsonnl on rqust. If any staff mployd by th contractor/sub-contractor contacts illnss, such as infctiv jaundic, gastro-ntritis, prsistnt diarrhoa or prolongd unxplaind fvrs, th mploy shall immdiatly cas involvmnt in th installation of th works and shall not rturn until grantd a mdical claranc, This must b rportd through th Customr to Irish Watr immdiatly. Infctd popl will not b prmittd to work on th activitis rlating to Watr Main, watr srvic installation or subsqunt rpair works of this infrastructur. Infctd popl will not b allowd to ntr th watr installation works sit without first obtaining authorisation from an appropriat mdical authority. Th Customr s contractor/sub-contractor shall nsur that h has sufficint chlorin wips availabl at all tims to maintain an appropriat lvl of clanlinss for his tools, quipmnt, pip, fittings, tc. All fittings shall b kpt within sald wrappings and must not b stord on th floor of vans or warhouss at any tim Mdium It is th rsponsib of th Dvlopr and/or dsignr to obtain all currnt information on th location of othr xisting ut or srvic providrs apparatus prior to th dsign bing carrid out. During installation, du dilignc should b usd whn making xcavations for watr mains and srvics and car shall b takn to protct and support all xisting srvics (watr, gas, tlcommunications, drainag, lctricity, tc.) and othr works so as not to intrfr with th working arrangmnts and intgrity of such utilitis. All availabl rcords should b usd to idntify th location of ut ducts, cabls, pips, tc. Propritary cabl locators shall b usd by CSCS traind prsonnl prior to xcavation taking plac to locat and mark ths utilitis. Du dilignc shall b takn whn making xcavations for watr mains and srvics. Car shall also b takn to protct and support all xisting srvics (watr, swrs, gas, tlcommunications, lctricity, tc.) and othr works so as not to intrfr with th working arrangmnts of th srvics. Appropriat hygin prcautions shall b takn to prvnt contamination of th infrastructur bing installd. Whn th Customr s contractor/sub-contractor suspcts that a contamination incidnt has occurrd, h shall notify Irish Watr immdiatly and th ncssary action will b dtrmind. IW-CDS Pag 1 of 17 Rv. 01 April 2018

5 Activity Rlatd Hazard Who is at Risk? Existing Control Masurs qunc Risk Ranking qunc Risk Ranking Accptanc of compltd works Insufficint standard for saf opration and maintnanc Othr Ut Providrs Sction 1.7 Application for a Conformanc Crtificat Irish Watr s Fild Enginrs will undrtak final sit inspctions on th compltd watr supply infrastructur in lin with th Critical Sit Inspction Policy during th construction of th Works. Th Customr s sit staff shall rtain on th sit of th Works a Quality Assuranc Foldr to includ information on as wll as on-sit quality assuranc rcords of th watr srvics infrastructur installation. Th documnt shall b updatd as rquird and mad availabl to th Irish Watr Fild Enginr for inspction. This documnt shall b usd to facilitat th collation of th Final Documnt as rfrrd to blow. Ths final inspctions will b carrid out aftr th submission by th Customr of an application for th issuing of a Conformanc Crtificat. Th Conformanc Crtificat is a documnt that will b issud to th Customr by Irish Watr indicating satisfaction with th construction of th Works following: Inspction of th constructd infrastructur confirming that it is constructd in accordanc with th Cod of Practic and Standard Dtails. (If minor corrctions ar rquird to th infrastructur (snags) a Dfcts Rport will b issud with th Conformanc Crtificat outlining ths minor dfcts); and Th Customr s submission of Final Documnts Th Final Documnts shall compris th following typical scop of documntation: Confirmation by a Chartrd Enginr that th Works has bn installd in accordanc with th dsign submittd in th Connction Application; Confirmation by a Chartrd Enginr that th Works has bn installd in lin with th Cod of Practic and Standard Dtails; Confirmation by a Chartrd Enginr and tst rsult crtificats indicating that th Works has undrgon appropriat on-sit tsting, off-sit tsting and commissioning. Th appropriat sit tsts for th Works would b, but ar not limitd to, th following: (i) Prssur Tsts on Ductil Iron Watr Mains (if appropriat) with a hard copy printout from th data loggr as proof of th outcom of th tst; (ii) Prssur Tst Rcords of polythyln pips (if appropriat) with a hard copy printout from th data loggr of th rlaxation curv as proof of th outcom of th tst. (iii) Tsting compltion rsults of Pumping Plant (if appropriat); (iv) Disinfction of Watr Mains (including claning, scouring, swabbing and disposal of disinfction watr); (v) Commissioning & tsting of Works including watr quality sampling and tsting of watr from th commissiond works; (vi) A printout of th joint dtails, with a GPS location of ach joint; Provision of As-Constructd drawings and rcords of th installd Works in hard and soft copy to b dlivrd to th Irish Watr Fild Enginrs; As-Constructd rcord of srvic pip installation compltion (including link to Hous Numbrs within th dvlopmnt); Provision of Safty Fil in accordanc with th currnt Safty and Halth Rgulations; Provision of Opration and Manuals for pumping plant (if such providd) including full pump dtails, prformanc curvs and powr ratings, tc., and all warranty documntation for th installd quipmnt as wll as drawings of th pump station; Provision of Dds of Grant Easmnt; Proof of ownrship of th Prmiss in th form of Dd/Solicitor lt; Confirmation of complianc with a Fir Safty Officr Rport; Confirmation by a Chartrd Enginr of complianc with th Building Rgulations and th Building Control (Amndmnt) Rgulations, in particular vidnc of complianc with th Building Rgulations to nsur plumbing systms complianc and no risk of backflow contamination; A construction stag hydraulic modl (if rlvant); As Built Rcord Drawings in hard copy and digital format, showing location and layout plans, longitudinal sctions and dtails of th Works and dvlopmnt in full. Plan scals should b in common us, i.. 1:500, 1:1000 or 1:2500 as appropriat. Drawings should b prpard using an lctronic systm and submittd in standard AutoCAD (dwg/dxf) fil format. Ths drawings shall contain th following information: - Locations of all valvs, hydrants, scour valvs or washout hydrants, mtrs, ducts, tapping locations, Watr Main and srvic pips, Boundary Boxs, tc., complt with lgnds to Irish Watr s rquirmnts; - Dtaild pip matrial typs, sizs, connction dtaild plans of pip branchs, showing valv locations, tc.; - Locations of assts ar to b to +/- 100mm accuracy in th horizontal plan to th cntr of th asst, with dimnsions rlating to fixd Irish National Grid (ING) co-ordinats; - Covr lvl for Watr Main fittings and intrmittnt Watr Main invrt lvls rlating to fixd Ordnanc Survy Datum (Malin Had) to an accuracy of +/- 20mm; - Longitudinal sctions, to an xaggratd vrtical scal, showing installd lvls, compltd ground lvls, invrt lvls, pip sizs, bdding, haunch and surround dtails, backfill dtails, togthr with Chambr locations, chainags, gradints, pip matrials, tc. All Chambrs for watr supply fittings shall b idntifid and providd with location co-ordinats to Irish National Grid (ING); - Dtails of any srvics and structurs on th sit, spcially thos in clos proximity to th Works including offst masurmnt to th watr supply systm; - Dwlling and building numbrs; - dtails of pump station as wll as mchanical, lctrical and instrumntation quipmnt dtails; Dtails of srvics and structurs on th sit, xisting and proposd, spcially thos in clos proximity to th Works including offsts masurmnts to th Works. Ncssary updats of th As-Constructd rcord drawings shall b providd on compltion of th dvlopmnt works and prior to occupation of th prmiss. Whr Works ar bing carrid out in a phasd mannr, an agrd mthod of submitting th as-constructdt rcords shall b agrd with Irish Watr. As a minimum, updatd drawings shall b submittd to Irish Watr vry 6 months or whn nw lmnts of a Watr Main ntwork hav bn mad liv. All connctions of th nw mains to th Irish Watr Ntwork will b mad by Irish Watr prsonnl or its agnts. Th final connction of th main shall only b allowd following: A satisfactory prssur tst; Satisfactory disinfction of th watr main; Satisfactory bactriological analysis rsults; Provision of as-constructd drawings and rcords; Installation of markr posts, plats, tc.; Confirmation that th installation is compltd in accordanc with all dsign documntation tc. IW Fild Enginrs will inspct all documntation & installd watr supply infrastructur & if adquat, will mak a rcommndation for issu of a Conformanc Crtificat. Final connction to th watr distribution systm shall b carrid out within 14 days of a succssful bactriological analysis bing achivd. Furthr tsting will b rquird if this priod is xcdd Mdium Low Rmdial Work Contamination of Watr Supplis Sction 1.12 Hygin Rquirmnts During Dfcts Liab Priod & Rmdial Work All pipwork componnts, fittings, quipmnt and tools usd on Watr Main rpair work carrid out during th Dfcts Liab Priod shall b clan. All componnts, quipmnt and tools shall b disinfctd. A solution containing 1% of availabl chlorin (.g. 10% chloros or othr commrcial hypochlorit solution) shall b usd. Contact tim shall comply with th EPA Disinfction Manual rquirmnts. Th quipmnt shall b rinsd or flushd with Mains watr to prvnt xcssiv corrosion. Portabl tst quipmnt, which may b usd in contact with potabl watr, shall b kpt clan. Any quipmnt which is in an uncrtain condition or which is contaminatd shall b cland and disinfctd bfor us. A high dgr of clanlinss shall b maintaind throughout th Watr Main rpair work. If ncssary, all parts around th sction of pip or srvic Main rpair shall b tratd with solution as abov. Spraying quipmnt shall b usd whr possibl. All nw pip sctions, quipmnt, fittings, tc. shall b chlorinatd immdiatly bfor installation with a solution, as abov. Sufficint wlfar arrangmnts shall b providd at ach work location by th Customr s contractor and sub-contractor to nsur sufficint hygin standards ar mt by thir workforc. Th contractor/sub-contractor shall pay particular attntion to working in or around aras with high risk sourcs of contamination. Th Contractor shall also pay particular attntion whn transmittabl disass may b prsnt and provid suitabl appropriat hygin standards. S also Sction 1.5 "Protction of Watr Quality" in this documnt & in particular, that th Dvlopr s contractor/sub-contractor working on potabl watr supply systms shall hav undrtakn training of thir staff on a rcognisd drinking watr supply hygin training cours. Th Local Authoritis Srvics National Training Group (LASNTG), Watr Srvics Training Group offrs a training cours, lading to a crtificat award, on drinking watr supply hygin for watr srvics prsonnl and contractor staff who work with watr srvics. Th Dvlopr s contractor/sub-contractor s staff working on watr supply infrastructur must hav compltd a Watr Srvics Training Group (WSTG) Drinking Watr Hygin Cours and will b rquird to hav a copy of this cours crtificat at all tims whil on th sit installing or rpairing th watr mains and prsnt it to Irish Watr prsonnl on rqust. Dsign to b vttd by IW CDS Dsign Tam and installation of infrastructur will b inspctd by IW Fild Enginrs. Final installd infrastructur will b assssd by IW Fild Enginrs prior to vsting. Rmdial work will b inspctd by IW Fild Enginrs following rmdiation. Appropriat hygin prcautions shall b takn to prvnt contamination of th infrastructur bing rmdiatd (rfr to Sction 1.5 of th Cod of Practic for Watr Infrastructur). IW-CDS Pag 2 of 17 Rv. 01 April 2018

6 Activity Rlatd Hazard Who is at Risk? Existing Control Masurs qunc Risk Ranking qunc Risk Ranking and othr works bing carrid out on th systm Inadquat or nonxistnt consnts / prmissions Contractors carrying out works in th futur Sction Statutory and Othr nts Th Customr shall obtain all ncssary consnts and othr prmissions for th proposd dvlopmnt including th Works Mdium Dvloprs ar rquird to hav all ncssary consnts in plac and CDS Dsign Tam will carry out a vtting of ach submission to nsur complianc. Dsigning of watr supply infrastructur Non complianc with Fir Authority rquirmnts Cross contamination of th public watr supply in th vnt of th fir fighting storag watr bing fd into th systm. Th in th vnt of insufficint watr supply for fir fighting. Th in th vnt of cross contamination of th potabl supply from th fir storag. Irish Watr Assts in th vnt of cross contamination from th storag supply for fir fighting. Sction 1.17 Fir Authority Liaison Th Local Fir Authority shall b consultd by th Customr on all dtails of Works to nsur complianc with thir rquirmnts. Th Customr or his/hr dsignr shall b rsponsibl for all liaisons with th Fir Authority and agring all arrangmnts for th provision of fir flow for fir fighting purposs. Irish Watr shall b mad awar of and providd with rlvant documntation arising from such consultation / liaison. Irish Watr may carry out a modlling assssmnt (if an appropriat calibratd modl is availabl) of th xisting Ntwork and basd on th known dmands at th tim advis th Customr of th thortical flow and prssurs at th proposd connction point in th Ntwork. Altrnativly, an in-situ flow & prssur tst may b carrid out at th xpns of th Customr by an approvd prson / organisation in conjunction with Irish Watr to idntify th actual flow & prssur availabl in th ntwork at a particular point in tim. It should b born in mind that th thortical rsults from th modlling and th actual rsults from th in-situ tsts cannot b guarantd by Irish Watr. Whr a Customr rqusts incrasd fir flow capacity in th watr supply ntwork to mt fir flow rquirmnts, Irish Watr will rviw th xisting ntwork and may offr to carry out ntwork upgrads, at th xpns of th Customr. In such instancs, Irish Watr can not guarant that th flow rats and rsidual prssurs will mt th rquirmnts of th Fir Authority. Irish Watr shall b contactd if th Fir Authority rquirs masur that affcts th dsign of th Ntwork,.g. a rquirmnt to hav mor than on connction srving a dvlopmnt. Irish Watr can not guarant that its Ntwork in any location will hav th capacity to dlivr a particular flow rat and associatd rsidual prssur to mt th rquirmnts of th rlvant Fir Authority Mdium Dsign will b vttd by IW CDS Dsign Tam and installation of infrastructur will b inspctd by IW Fild Enginrs. Final installd infrastructur will b assssd by IW Fild Enginrs prior to vsting. Whr th xisting Ntwork dos not hav capacity to provid th Fir Authority fir flow rquirmnts and / or if no Ntwork infrastructural improvmnts ar plannd by Irish Watr, th Customr shall provid adquat fir storag capacity within th dvlopmnt to satisfy th Fir Authority s fir flow rquirmnts. This fir watr storag infrastructur shall b providd with facilitis to nsur that no cross contamination occurs of th potabl watr within th supply infrastructur. This ncssary works to prvnt cross contamination shall b providd to th agrmnt of Irish Watr. Whr sparat fir mains ar providd off of Irish Watr s Ntwork, a ddicatd bulk flow mtr and associatd tlmtry systm shall b providd at th Customr s cost. Th connction arrangmnt shall b providd with a chck valv to prvnt backflow into th Watr Ntwork systm. Dsign & Failur to appoint comptnt bodis to undrtak dsign & construction activitis. Sction 2.2 Gnral Dsign Rquirmnts Th dsign should incorporat a dsign risk assssmnt to nsur that risks to both th local community and oprators of th Works ar minimisd. Th provisions of th Safty, Halth and Wlfar at Work Act 2005 and associatd Safty, Halth and Wlfar at Work () Rgulations shall apply in rspct of th appointmnt of a comptnt dsignr, Projct Suprvisor Dsign Procss (PSDP) and Projct Suprvisor Stag (PSCS). Th Customr or his dsignr shall crtify that th dsign complis with th Cod of Practic and Standard Dtails and accpts liab for complianc through thir profssional indmnity insuranc, which shall b kpt in plac for a priod of 6 yars aftr th compltion of th Works. Th Customr shall nsur that this profssional indmnity insuranc is rtaind and that vidnc of this is availabl if rqustd by Irish Watr. Th dsign rsponsibilitis and liabilitis shall not b dischargd by Irish Watr aftr th dsign passs a satisfactory inspction and issu of a d-facto statmnt of no objction via th Connction Agrmnt. It is th rsponsib of th Dvlopr/Clint to nsur that comptnt bodis ar appointd as PSDP and PSCS outlind in lgislation. and may rquir its amndmnt if dmd IW-CDS Pag 3 of 17 Rv. 01 April 2018

7 Dsign & Activity Rlatd Hazard Who is at Risk? Existing Control Masurs qunc Risk Ranking qunc Risk Ranking Inadquat dsign. IW Contractors carrying out works in th futur. Sction Drawings, Calculations and Dsign Information Drawings and calculations shall b supplid for th Works, including lmnts that ar not to b takn in charg by Irish Watr, i.. Pips that ar not within th Attndant Grounds of th dvlopmnt. Layout plans shall b prpard with standard lgnds and symbols as rquird by Irish Watr s Drawing Standard and at last with watr srvics industry norms. Th drawings submittd by th Customr should show th prcis layout as dictatd by th local topography and all ncssary dtaild information rquird for guidanc. Th drawings should show th sit boundary, xisting ut apparatus, North point, Ordnanc Grid rfrnc for th cntr of th sit, Ordnanc Grid rfrnc for th proposd connction point, tc. Location and layout plans, longitudinal sctions and dtails should show th watr supply systm and dvlopmnt in full. Plan scals should b in common us, i.., 1:200, 1:250, 1:500, 1:1000 or 1:2500 as appropriat. Drawings should b prpard using an lctronic systm and submittd in standard Autodsk AutoCAD (dwg/dxf) compatibl fil format. Dtails to largr scals should b providd whr ncssary. Th drawings submittd should also show th following: Th location of th sit on an Ordnanc Survy Map with th sit outlind in rd; Layout of roads and proprtis including plot numbrs, phasing of dvlopmnt (if rlvant); Lin and layouts of Watr Mains, hydrants, valv Chambrs, mtr boxs, scour Main systms, air valvs, dtails of all associatd faturs and xtrnal proprty dtails; Dtaild information on th proposd Watr Mains including Main siz, pip matrial, class of pip, prssur rating, tc., including dtails of xisting srvics in th cas of infill or brownfild sits; Locations of srvic pips, showing siz of srvic pip if abov 25mm diamtr. Locations of Boundary Boxs, manifold boxs and mtr Chambrs; Dtails of typ of Srvic Connctions and mtr arrangmnts for apartmnt and multi occupancy units to allow watr supply mtring of individual proprtis; Any fir flow storag capacity arising from Fir Authority rquirmnts as wll as associatd fir ntwork and accssoris; Clar dmarcation showing th watr infrastructur to b installd by th Customr as opposd to that to b constructd by Irish Watr; Dtails of ovr ground and undrground structurs within th Attndant Grounds that ar to b takn in charg in Irish Watr, including appropriat vhicular accss to ths structurs. Contours of xisting ground lvls, proposd ground lvls and proprty floor lvls rlativ to Ordnanc Datum (Malin Had); Longitudinal sctions, to an xaggratd vrtical scal, showing proposd lvls, xisting ground lvls, invrt lvls, pip sizs, bdding, haunch and surround dtails, backfill dtails, togthr with Chambr locations, chainags, gradints, pip sizs, pip matrials, tc. All Chambrs should b givn uniqu squntial numbrs/lttrs for idntification; Locations of all natural faturs, such as trs, strams, rivrs, springs, tc., which ar in th vicinity of th proposd watr supply ntwork systm; Location of manmad faturs, such as xisting structurs, buildings, roads, bridgs, tc., which ar in clos proximity to th proposd watr ntwork systm; An intgratd ut layout plan showing th layout of all ut infrastructur (ESB Ntworks, Gas Ntworks Irland s Ntworks, tlcommunication providr ducting, tc.) and indicating th rlativ sparation distancs btwn th various ut infrastructur; Layout taking into account possibl futur dvlopmnts; Location of Ordnanc Survy (OS) Bnchmarks and thir valu to Malin Had Datum; Information and dtails of watr managmnt infrastructur within th dvlopmnt as rquird undr Sction 3.29 of th Cod of Practic for Watr Infrastructur. Th dsign should b clar and unambiguous outlining th watr dmand rquirmnts basd on th typ and numbr of units srvd, occupancy rat of th units, pr-capita dmand, tc. Th dsign should outlin th avrag day pak wk dmand, pak flow factor, hadroom allowanc, tc. Th Works should b modlld and dsignd using an approvd softwar packag whr rquird which provids a ntwork modl, pip flow, prssurs, tc. in it's output. Th dsign should covr associatd works such as pip supports, bds, surround, backfill, surfac rstoration, accss arrangmnts, tc. S also Sction 1.7 in this documnt "Application for a Conformanc Crtificat". IW CDS Tam will vt th submittd dsign and may rquir its amndmnt if dmd Dvlopr/ Controllr/Dsignrs to nsur adquat dsigns ar carrid out and providd to IW for rviw. IW CDS Fild Enginrs will inspct Final Documnts (including as-constructd drawings) & will assss thm for adquacy as outlind in Sction 1.7 of th Cod of Practic for Watr Infrastructur Low Opration Rliab of watr supply systm IW Sction Rliab and Dsign Objctivs Th Works shall b dsignd and constructd to rliably convy th watr flows that ar rquird of th dvlopmnt including fir flow rquirmnts by th Fir Authority. Th siz of th Watr Mains within nw dvlopmnts is to b govrnd by: Th rquirmnt that thy hav adquat hydraulic capacity to dlivr customr dmands at all tims; Thy rsrv th wholsom watr quality; Thy avoid xcssiv rtntion or travl tims Thy nsur adquat turnovr of watr and prvnt stagnation in th systm. Contractors carrying out works in th futur. Th Watr Main layout should provid fficint and flxibl opration of th Works with minimum control points and surfac assts to mitigat futur maintnanc and opration costs. Pips should b fr from dfcts or othr faturs that might giv ris to blockag, airlocks or othrwis impd th watr flow. Th rang of flow vlocity within th watr supply Mains should li btwn 0.3 m/sc and 1.5m/sc, and prfrably in th middl of this rang. Th pipwork should b slctd to nsur that th had loss in th pipwork dos not xcd 3m/km Mdium dsigns. Dsign c-oordination rquird by a and may rquir its amndmnt if dmd IW Fild Enginrs will vt th final installd infrastructur and xamin th Final Documnts prior to vsting. Location of pips Watr supply infrastructur not installd with adquat rgard for location, as of accss, opration and maintnanc Sction 3.5 Layout of Works Th following gnral guidanc applis to th locations of Watr Mains in nw dvlopmnts: Watr Mains shall prfrably b laid undr footpaths or grass margins if possibl, othrwis thy may b laid on th roadway, subjct to locating thm a saf distanc away from th footpath / grass margin krb; No nw Watr Main up to and including 150mm in diamtr shall b laid within 3m of an xisting or proposd building structur without th xprss approval of Irish Watr; No nw Watr Main btwn 200mm and 600mm in diamtr shall b laid within 5m of an xisting or proposd building structur without th xprss approval of Irish Watr; No nw Watr Main in xcss of 600mm in diamtr shall b laid within 8m of an xisting or proposd building structur without th xprss approval of Irish Watr; In addition to th forgoing, no nw Watr Main up to and including 150mm in diamtr shall b locatd within 1m of th boundaris of prmiss; Watr Mains shall not b locatd undr walls, in aras dsignatd for trs, shrubs or flowrs. Trs should not b plantd in th immdiat vicinity of th Watr Main unlss tr root intrusion protction is providd. Th sparation distancs btwn th Watr Main and th trs / shrubs will b dpndnt on th spcis typ and on th lvl of tr root intrusion protction that is providd. Watr Mains shall b laid in common aras and not through individual privat gardns. Dsign will b vttd by IW CDS Dsign Tam and installation of infrastructur will b inspctd by IW Fild Enginrs. Final installd infrastructur will b assssd by IW Fild Enginrs prior to vsting. IW-CDS Pag 4 of 17 Rv. 01 April 2018

8 Flushing of systm Activity Rlatd Hazard Who is at Risk? Existing Control Masurs qunc Risk Ranking qunc Risk Ranking Watr quality issu arising from inab to flush ffctivly IW Sction 3.5 Layout of Works a) Watr main layouts shall b arrangd in loops or rings so as to avoid "dad nds" or trminal points. All mains shall trminat in a loop or ring to accommodat ondirctional flushing of th ntwork. Loops shall hav a minimum of four connctd houss and on hydrant. b) Watr mains should b laid to provid th optimum circulation in th local watr ntwork. Watr mains may trminat in a dad nd only with Irish Watr approval, in which cas a duck-foot washout hydrant, locatd within a Chambr or kiosk, shall b providd at th dad nd. c) Valvs shall b arrangd at junctions and spin Watr Mains in such a mannr so as to nsur that a watr shut-down will affct no mor than 40 proprtis at any on tim. d) Watr mains gratr than 300mm in diamtr laid undr havily traffickd roads shall b ductil iron. ) Loopd watr mains shall rturn to th spur Main downstram of a sluic valv. Dsign will b vttd by IW CDS Dsign Tam and installation of infrastructur will b inspctd by IW Fild Enginrs. Location of fir hydrant Inab to us hydrant in an mrgncy scnario. Fir Dpartmnt Sction 3.5 Layout of Works a) Th location of hydrants should b such that thy can b accssd in an mrgncy. Hydrants should not b locatd in roads or parking aras. b) Whr possibl, a hydrant should b locatd within 20m of ach junction. c) No domstic proprty within a dvlopmnt shall b mor than 46m from a hydrant. Hydrant dtails and locations shall b subjct to th approval of th rlvant Fir Authority. This rquirmnt may tak account of dad-nd or wash-out hydrants. A hydrant shall not b closr than 6m to a proprty. d) Th location of branch valvs, hydrants or othr apparatus shall b to th agrmnt of Irish Watr. Dsign will b vttd by IW CDS Dsign Tam and installation of infrastructur will b inspctd by IW Fild Enginrs. Watrmain location Inab to carry out rpairs du to accss Othr Ut Providrs Sction 3.5 Layout of Works a) Whr a watr main is locatd in an ara of rstrictd accss such as undr motorways, canals, railways, rivrs tc., a duplicat Watr Main (or a slv for a rplacmnt Main) shall b installd to maintain watr supply in th vnt of a problm with th liv Main until accss is availabl to carry out rpairs. Th scond Main shall b th sam as th first Main in rgards to matrial, diamtr and flow capacity. Isolation valvs shall b providd on both sids of th inaccssibl ara to allow th watr supply to b rdirctd btwn ithr Main. b) Whr a Watr Main is to b locatd within a structur such as a bridg or culvrt, th Customr shall consult with Irish Watr to stablish if th Watr Main is b duplicatd. In most instancs Irish Watr may rquir that th Mains ar placd within slvs to facilitat asy rplacmnt of th pip. In gnral, howvr, Irish Watr discourags th construction of Watr Mains within bridg or culvrt structurs and th installation of th Mains across th watrcours adjacnt to th bridg/culvrt structur is prfrrd; c) Surfac watr attnuation tanks shall not b constructd ovr Watr Mains. d) Watr Mains shall b laid in common aras and not through individual privat gardns or drivways tc. )Watr Main bnds and road crossings should b kpt to an absolut minimum. Dsign will b vttd by IW CDS Dsign Tam and installation of infrastructur will b inspctd by IW Fild Enginrs. Prssur control during opration Excssiv prssur Othr Ut Providrs Sction 3.5 Layout of Works Prssur control shall b providd at th tak-off point of th nw connction if rquird to control high prssurs by way of a prssur rducing valv (PRV). Whr possibl thir nd shall b dtrmind in advanc, but in som cass Irish Watr may rquir ths to b installd aftr th Main is mad liv. Th cost of this work shall b born by th Customr. Th nd for PRVs shall b agrd with Irish Watr. Prssur sustaining valvs (PSV) may b rquird in spcific xcptional circumstancs and only by agrmnt with Irish Watr. Th PRVs and PSVs will b chosn and supplid by Irish Watr for installation in Customr supplid Chambrs. Dsign will b vttd by IW CDS Dsign Tam and installation of infrastructur will b inspctd by IW Fild Enginrs. Control of flow Rpairs causing a larg numbr of houss to b without watr Sction 3.5 Layout of Works Branch pips off spin Mains should hav isolation valvs installd to sparatly control all of th flows downstram of th pip junction. Thr valvs to a junction ar rquird to allow th flow of watr to b dirctd in both dirctions. Th nd for additional in-lin valvs is dpndnt on th housing dnsity and oprational rquirmnts such as stp tsting rlating to activ lakag control. Sluic valvs should b situatd to nsur that watr flow can b shut off affcting no mor than 40 proprtis at any on tim Mdium Dsign will b vttd by IW CDS Dsign Tam and installation of infrastructur will b inspctd by IW Fild Enginrs. IW-CDS Pag 5 of 17 Rv. 01 April 2018

9 Claning / Flushing Activity Rlatd Hazard Who is at Risk? Existing Control Masurs qunc Risk Ranking qunc Risk Ranking Inab to ffctivly clan out main rsulting in watr quality issus Oprational & Sction 3.5 Layout of Works Watr Mains should b laid to provid th optimum circulation in th local watr ntwork. Watr Mains may trminat in a dad nd only with prior Irish Watr approval, in which cas a duck-foot washout hydrant, locatd within a Chambr or kiosk, shall b providd at th dad nd. Mains should xtnd no mor than 1.2m byond th final Srvic Connction to mitigat dad-nd Mains, unlss this is absolutly ncssary to locat an nd hydrant in a suitabl location. Valvs and washout hydrants should b locatd, as far as is practicabl, in footpaths or vrgs to facilitat accss, for safty rasons and to guard against th impact of traffic, surfac watr and silting of Chambrs. Th location of fir hydrants should b such that thy ar accssibl in an mrgncy. Fir hydrants should only b locatd on paths or opn spacs or approvd aras. Whr a Watr Main is locatd in a road, th hydrant should b lggd off-lin in to th narst suitabl path or opn spac and connctd to th Watr Main with an 80mm spur Main. In som Local authority aras, such lggd off hydrants may rquir th inclusion of a sparat valv on th t pic of th Main whr th Main is 200mm or gratr in diamtr. Th provision of such valvs shall only b incorporatd subjct to th approval and knowldg of th Fir Authority. Dsign will b vttd by IW CDS Dsign Tam and installation of infrastructur will b inspctd by IW Fild Enginrs Mdium On compltion of construction and bfor any disinfction, intrnal surfacs shall b clansd thoroughly by swabbing. Foam swabs shall b usd and rcovrd following swabbing. Th swabs should b usd only onc. On compltion of th prssur tst, a foam swab shall b passd through th main for final clansing a sufficint numbr of tims to achiv clar wash watr. All piplins shall b disinfctd with watr having a minimum concntration of 20mg/l of fr availabl chlorin. This can b achivd using a sodium hypochlorit solution. Typical products on th markt contain 10 14% availabl chlorin by solution and th dos rat is dpndnt on th strngth of th solution and th volum of watr rquird in th watr main Mdium Sparation Distancs Inab to maintain Assts Intrfrnc with othr ut srvics Sction 3.6 Sparation Distancs A storm watr swr or a wastwatr swr should gnrally not b installd to cross ovr a Watr Main. Whr crossing ovr a watr main is unavoidabl, joints in th Watr Main shall not b locatd dirctly abov surfac watr or Wastwatr Swr crossings. This rquirmnt also applis to powr and tlcommunication utilitis oil filld cabl systms. No othr ut srvic should b laid longitudinally dirctly abov th lin of th Watr Main. Pip/ducts, cabints, pols, junction boxs or Chambrs shall not b constructd on top of a Watr Main. Any proposd pip crossing of th Watr Main shall do so at right angls, or as nar to as possibl, to avoid prolongd nvlops of influnc btwn th srvics. Crossings should b locatd midway btwn th Watr Main joints with a minimum vrtical clar distanc of at last 300mm and up to 500mm in som instancs btwn th pip and th Watr Main. All such crossings shall b to Irish Watr approval and shall not b undrtakn until Irish Watr or its agnts has xamind th work at th crossing point and dmd it fit for backfilling. Thr should b a minimum clar horizontal distanc of at last 300mm btwn th Watr Main and othr utilitis running paralll to it, as wll as to cabints, pols, junction boxs or Chambrs. Th following minimum horizontal clarancs to othr srvics running paralll to th Watr Main shall apply: 300mm to Watr Mains of lss than 300mm diamtr, 500mm to trunk Mains btwn 300mm and 450mm diamtr, 3.0m to artrial Watr Mains of gratr than 450mm diamtr. Thr shall b a minimum vrtical distanc of 300mm btwn th Watr Main and othr utilitis laid paralll to it, subjct to th spcific spatial distanc rquirmnt of th ut providr. Thr shall b a minimum vrtical claranc btwn th Watr Main and any othr srvic crossing ovr it as follows: 300mm to Watr Mains of lss than 300mm diamtr, 500mm to trunk/artrial Watr Mains of diamtr gratr than 300mm. Ovr and abov th forgoing, all crossings shall b positiond such that thy ar at last 500mm away from any Watr Main fitting or joint. Th location of th watr Mains rlativ to othr srvics, structurs and obstructions for a particular dvlopmnt shall b shown on plan and cross sction as part of th dsign submission pack, with claranc dimnsions clarly idntifid. Drawings showing any rvisions, during th tndring and construction phas of th dvlopmnt should b submittd to Irish Watr for approval. No infrastructur installation shall b advancd without th prior writtn claranc of Irish Watr Dsign will b vttd by IW CDS Dsign Tam and installation of infrastructur will b inspctd by IW Fild Enginrs. It is th rsponsib of th Dvlopr and/or dsignr to obtain all currnt information on th location of othr xisting ut or srvic providrs apparatus prior to th dsign bing carrid out. During installation, du dilignc should b usd whn making xcavations for watr mains and srvics and car shall b takn to protct and support all xisting srvics (watr, gas, tlcommunications, drainag, lctricity, tc.) and othr works so as not to intrfr with th working arrangmnts and intgrity of such utilitis Mdium Th sparation distancs outlind abov ar minimum rquirmnts. Spcific sparation claranc distancs in xcss of ths minima shall b providd for srvics such as gas, lctricity, fibr-optic or oil filld cabls as th cas may b. Th particular ut providrs shall b consultd to dtrmin ths minimum sparation distancs and vidnc of this consultation, with th spcifid sparation distancs, shall b providd to Irish Watr at dsign submission stag. For xampl, th minimum sparation distancs for Gas Ntworks Irland infrastructur shall b in accordanc with IS329 Gas Distribution Mains and IS328 Cod of Practic for Gas Transmission Mains as amndd/updatd. In th cas of installations to b constructd in clos proximity to xisting Watr Mains, spcific approval of Irish Watr shall b obtaind. In th cas of xisting ntwork pipwork, altrnativ minimum horizontal distancs shall b maintaind btwn pips / ducts, cabints, pols, manhols, junction boxs, chambrs, tc., as outlind in Sction 3.25 of th Cod of Practic for Watr Infrastructur. IW-CDS Pag 6 of 17 Rv. 01 April 2018

10 Activity Rlatd Hazard Who is at Risk? Existing Control Masurs qunc Risk Ranking qunc Risk Ranking Dsign,, Opration Insufficint watr supply capacity Prssur boosting of Watr Supplis Insufficint Prssur Backflow causing contamination draw-off from Irish Watr Asst causing rducd prssur in th ntwork Th Sction 3.7 Sizing of Watrmains Th siz of Watr Mains in a nw dvlopmnt will b primarily contingnt on th prssur availab on th xisting watr supply ntwork and on Irish Watr s viw on th dsird long trm prssur for th ntwork in th vicinity of th dvlopmnt. Th minimum siz of Watr Main shall normally b 100mm nominal intrnal diamtr but pips with a nominal intrnal diamtr of 80mm may b allowd in crtain circumstancs and only aftr th prior writtn prmission of Irish Watr has bn obtaind. Watr Mains of smallr intrnal diamtr may b allowd in xcptional circumstancs whr a small numbr of dwllings ar to b supplid. In ths instancs, a 25mm minimum pip siz may b allowd whr a singl hous supply is rquird. If two dwllings ar supplid, th Main siz should b 32mm intrnal diamtr. Rfrnc is to b mad to Sction of th Cod of Practic for Watr Infrastructur for th maximum allowabl pip lngth for pip diamtrs of 32mm and lss. A pip of minimum 50mm intrnal diamtr may b allowd for a supply to hous groups of btwn thr and fiv houss. Howvr, as a guid to th sizing of Watr Mains for a givn numbr of proprtis, th pip sizs in th Tabl in Sction 3.7 of th Cod of Practic for Watr Infrastructur should b usd. Th sizs shown in th Tabl in Sction 3.7 of th Cod of Practic ar for guidanc only and should not b substitutd for conducting an adquat hydraulic assssmnt taking into account all rlvant factors, such as domstic dmand (including consumption dmand, houshold occupancy, hous typ, pak dmand), fir flow dmand, spcial fittings (such as sprinklr systms), pip lngth, friction factors, flow vlocity constraints, had-losss, nsuring adquat prssur in th ntwork, tc. Guidanc for watr pip sizing for domstic dvlopmnts is outlind in Sction 3.7 of th Cod of Practic for Watr Infrastructur. Dmands for businss dvlopmnts should b stablishd basd on th spcific rquirmnts of such proprtis. This dmand will dtrmin th pip siz rquird. In ths instancs th paking factor will not b as high as that usd for domstic supplis and will gnrally b basd on th maximum flow rquirmnt from th dvlopmnt. Supporting Information rlating to th paking factors usd that ar in varianc to th watr dmand figurs in Sction 3.7 of th Cod of Practic for Watr Infrastructur should b submittd to Irish Watr for approval prior to intrnal pip layout dsign. Sction 3.13 Boostd Watr Supplis Irish Watr may, at its discrtion, adjust th prssur in its Ntwork as it ss fit for oprational rasons, but with th objctiv of maintaining an adquat prssur had at th Curtilag of proprtis. Dvlopmnts which involv buildings gratr than two storys in hight and/or rquiring a supply prssur in xcss of 15m had at th Curtilag of th proprty should b mad known to Irish Watr. Th Local Authority for th ara whr th dvlopmnt is bing undrtakn, acting as th Building Control Authority, will hav spcific rquirmnt for th building s proposd intrnal prssur boosting arrangmnts and ths rquirmnts shall apply. For any proposd intrnal or privat prssur boosting arrangmnts, dtails of th proposd boosting arrangmnts shall b mad known to Irish Watr at Dsign Submission and Connction Application stag for rviw. Th typical Building Control Authority s rquirmnts would gnrally compris th following: Buildings in ths dvlopmnts should b quippd with balancing tanks and boostr pumps on th rising Main to th top story units to nsur adquat prssur to th prmiss. Indirct prssur boosting will only b prmittd as this may impact th srvic provision within th Irish Watr supply ntwork for othr usrs, i.., pumping from a brak prssur cistrn, supplid from Irish Watr s Ntwork. In lin boosting may b accptabl whr th rquird dmand dos not xcd 10 litrs pr minut, but this will only b allowd with th writtn approval of Irish Watr. All boostr pumps with a capacity in xcss of 10 litrs pr minut shall b fd from a brak tank / cistrn. Th ffctiv capacity of th brak prssur tank / cistrn to b dcidd aftr considration of th total watr storag rquirmnts and its location within th building, but should not b lss than 30 minut pump-out capacity. Sparat brak prssur tank compartmnts may b rquird for multi-block units and for maintaining supply during claning and srvicing. Th Customr shall b rsponsibl for th maintnanc of th brak tank/cistrn. In this rgard, in addition to providing isolation dvics and anti-backflow fittings, as dscribd blow, a suitabl maintnanc schdul must b put in plac to avoid any contamination, misus, tc. of th quipmnt. and may rquir it's amndmnt if dmd IW Nw Connctions Tam will vt th submittd dsign and may rquir its amndmnt if dmd It is th rsponsib of th dsignr to stablish th rquirmnt of th building s watr supply systm. It is also th rol of th dsignr to nsur that th boosting proposal is sufficint to mt th rquirmnts of th dvlopmnt, subjct to rquirmnts that Irish Watr may impos to protct th public watr supply. Th dsignr shall supply th building ownr and /or th managmnt company with full dtails of th boostr systm and brak tank installation. Ths dtails shall form part of a maintnanc schdul for th systm including claning of th brak cistrn, which will b to th rquirmnts of th Building Control Authority Mdium It is th rsponsib of th dsignr to stablish th rquirmnt of th building s watr supply systm. It is also th rol of th dsignr to nsur that th boosting proposal is sufficint to mt th rquirmnts of th dvlopmnt, th rquirmnts of th Building Control Authority and subjct to rquirmnts that Irish Watr may wish to impos in ordr to protct it,s Ntwork. Th dsignr shall supply th building ownr and /or th managmnt company with full dtails of th boostr systm and brak tank installation. Ths dtails shall form part of a maintnanc schdul for th systm including claning of th brak cistrn, which will b to th rquirmnts of th Building Control Authority. Th Customr will rtain rsponsib for th privat sid Distribution Systms within prmiss, including th brak prssur tank and boostr quipmnt. Irish Watr will not tak charg of or b rsponsibl for ths Distribution Systm works. Watr quality within th systm must b maintaind and Irish Watr will not b rsponsibl for inadquat watr quality arising from privat sid Distribution Systms. Likwis, an accptabl isolation dvic shall b providd using a connction via an unrstrictd air-gap dvic (AA Typ dvic, IS EN 1717) to prvnt backflow from th intrnal watr Distribution Systm to Irish Watr s Ntwork to prvnt th risk of backflow contamination. Bfor installing boostr pump(s) full dtails of th proposd installation shall b providd to Irish Watr and th rlvant Local Authority. Th ffctiv capacity of th brak cistrn shall b dcidd aftr du considration of th total watr storag rquirmnts and its location within th building, subjct to it bing not lss than 30 minuts pump output as outlind abov, unlss othrwis approvd by Irish Watr. Th brak tank / cistrn should b a closd vssl having a tightly fitting accss covr, boltd or scrwd in position. It shall b suitably maintaind, inspctd rgularly and cland whn ncssary. It shall b coatd to prsrv th wholsom quality of th watr. It shall hav an air inlt and ovrflow pip or pips, all suitably scrnd to prvnt vrmin accss. It shall, whr ncssary, b insulatd against tmpratur changs and b supplid xclusivly from a srvic pip with a ball valv. A sampling tap shall b providd on th inlt pip fd to th brak tank / cistrn for th us of Irish Watr for quality sampling purposs Mdium IW-CDS Pag 7 of 17 Rv. 01 April 2018