Espa Pumps (UK) Ltd 15-16 Riverside Avenue West Lawfrd, Manningtree Essex CO11 1UN Tel: (01206) 391291 / Fax: (01206) 391239 sales@espa.c.uk www.espa-pumps.c.uk
HEALTH & SAFETY The main phases f the installatin f a tank are: Unlading & maneuvring the tank Grund wrks t prepare the grund fr the installatin f the tank and assciated drainage and service-duct runs Installatin and cnnectin f the tank All Health & Safety precautins applying t such wrks are t be implemented, with risk assessments and methd statements (examples attached) being prepared. UNLOADING THE TANK 1. Tank transprtatin t site is nrmally arranged by the supplier wh will crdinate assciated arrangements with site persnnel. Warning 2. Respnsibility fr the tank passes t the buyer nce unlading cmmences; it is therefre imprtant that the buyer accepts the cnditin f the tank n arrival befre they attempt t manhandle the tank (nt recmmended), mve it with machinery such as frk-lift arms, r attach lifting equipment. Warning 3. The Tanks are designed t be lifted and maneuvred nly when empty; they are nt therefre t be lifted when cntaining water under any circumstances as this will add cnsiderable weight. 4. It is recmmended that the tanks be unladed frm delivery lrries, mved arund site, and lwered int their installed psitin by attaching lifting chains and apprpriately sized D-shackles t the lifting pints prvided, r by use f lifting straps arund the whle tank; pints t nte are: As the centre f lift may nt cincide with the centre f gravity f the tank, sme initial swing shuld be anticipated; this must be stabilised befre the tank is mved further Similarly, the chain lengths selected may nt result in the tank establishing a true hrizntal psitin nce lifted clear f the transprt; if s, the tank shuld be relwered and the chain lengths adjusted accrdingly T stabilise the lad when mving arund site, guide-rpes shuld be attached t the chains, enabling peratives t cntrl the lad frm a safe distance 5. Example risk assessments and methd statements are attached cvering the abve activities. Warning 6. These examples are nt site-specific and must be replaced with their site-specific equivalents befre assciated wrk is undertaken.
INSTALLING THE TANK General Infrmatin 7. These instructins are designed t cver the cmplete range f tanks which cme in a range f nine cnvenient sizes frm 1,800-litres t 10,000-litres. The instructins relate t the handling and installatin f the tank nly, with any additinal fitments requested being the respnsibility f the buyer. 8. The tanks have been specifically designed t act as rainwater strage tanks; the tank is designed t be installed in accrdance with the instructins belw, taking additinal precautins nly in the special circumstances identified in the fllwing table: Exceptinal Cnditins Grund heavy clay High water table Traffic bearing Adjacent bank/raised pati Adjacent fundatins (2) Nn-standard install depth Added Precautins Required Minimum cver f 1m Minimum cver f 1m Apprved (1) arrangements Apprved arrangements Apprved arrangements Apprved arrangements Warnings 9. If site persnnel are faced with any f the cnditins nted in the table abve, they shuld seek supervisry advice befre cmmencing tank installatin. 10. The tank is designed t take pedestrian and light mwer lading nly, with a burial depth f between 700-mm and 1400-mm frm the crwn f the tank t finished grund level. The telescpic dme and neck extensin are adjustable within limits t assist with the finishingff prcess. 11. The custmer may, if wished, substitute their wn brick-cnstructin manhle and cver prvided these are s cnstructed that they d nt transfer any weight nt the bdy f the tank. 12. Pipe-falls must be a minimum f 1:100 in the directin f water-flw, ie rainwater pipe and service duct twards the tank, and the verflw away frm the tank External Wrks 13. The installatin f the rainwater strage tank, and its cnnectin t the water-supply, water-verflw and service-duct pipes shuld be undertaken at the same time as the verall undergrund wrks fr the prject.
14. The tank shuld be aligned t prvide the straightest pssible service duct run between the tank and the Cntrl Unit as ther pipe-wrk and cabling etc need t be fed thrugh this duct at a later stage; the figure belw shws this ideal relatinship. Warnings 15. The tank must be handled and installed strictly in accrdance with the instructins prvided t site; nce installed, the psitin f the tank is t be clearly marked and ver-driving by vehicles within 4-metres f a tank edge is strictly frbidden. Step-by-Step Guide 16. The fllwing is a step-by-step guide t the installatin f the tank when n added precautins (as identified in the Table abve) need t be taken: Arrangements shuld be made fr the tank t be delivered, cincident with the day it is due t be installed; with this in mind, when delivery is expected ensure: Suitable access and parking arrangements have been made fr the delivery vehicle Plant is available t unlad the tank A clear rute has been designated between the delivery vehicle and the installatin site A risk assessment and methd statement fr unlading and maneuvring the tank have been prepared and signed-ff The installatin site is level and clear f bstacles and site debris and, ideally: The water ingress pipewrk is cmplete and ready fr cnnectin The water verflw pipewrk is cmplete, ready fr cnnectin, and is itself cnnected t the surface water management system (sakaway, strm-drain r attenuatin as apprpriate) The service duct is ready fr cnnectin Befre starting the installatin, cnfirm n added precautins (see Table abve) apply; ie, there is n requirement t: Install in heavy clay (in which case minimum cver ver tank bdy f 1-metre Install in a high water table (in which case, again, 1-metre f cver) Carry the weight f vehicular traffic (in which case structural engineer s design required) Clser than 4-metres t adjacent fundatins (structural engineer needed)
Install adjacent t an earth bank r raised pati (structural engineers needed) Install with cver f less than 700-mm r mre than 1400-mm (structural engineer needed) Cmplete and sign-ff an installatin risk assessment Cmplete and sign-ff the installatin methd statement Calculate depth f dig (Dimensin-X in the Diagram belw), which equals: Entry water invert level f drainage system (using the bttm edge f pipe as the datum) marked Dimensin-A belw Plus the distance between the invert level datum and the tp f the tank bdy marked Dimensin-B belw Plus the height f the tank which equals 1250-mm fr all G-Tanks Plus the depth f the pea-gravel bed which equals 50-mm fr all G-Tanks Warning
Line-mark dig area, allwing fr: Alignment f tank water entry and exit cnnectins, and the service-duct cnnectin (NB: The service dust mst slpe twards the tank, nt away if it is t be used fr mains tp-up water) (Tank plan-view dimensins) + (300-mm fr tank maneuvre/access) + (a suitable allwance fr battering depending n grund cnditins) Dig the excavatin, anticipating that grund water ingress may be experienced in the prcess; if necessary, keep water interference t a minimum by use f a pump Bed the bttm f the excavatin with 50-mm f 10-mm washed pea-gravel Psitin tank n the pea-gravel base, and check vertical and hrizntal alignments between tank cnnectrs and the drainage runs/service duct, allwing fr 10-mm f tank settlement at the next step Fill 1/3 rd full f water t settle tank int the pea-gravel, and bring cnnectrs and pipewrk int final alignment Cnnect all pipewrk (ie rainwater-in, verflw-ut, and service duct) Install neck, ensuring that there is a gd bead f silicn sealant arund jints t prevent subsequent ingress f grund-water; then install the lid t ensure that n backfill material can enter the tank Backfill arund the tank bdy and sides f the excavatin with mre 10-mm washed pea-gravel up t the level f the water inside the tank Fill the tank with water t the level f its inlet/utlet cnnectins Cntinue backfilling the tank with pea gravel until the crwn f the tank is cvered with 10-mm f pea gravel Backfill t finished grund level with free-flwing material Once the installatin is cmplete and the tank cnnected: Install filter (if nt already installed) Seal filter with strng plythene (t prevent rf water entering the tank until the whle system is ready t be handed-ver t the end-user) Secure the tank lid Mark ut an exclusin zne 2-metres utside the riginal excavatin ftprint t prevent site vehicles accidentally driving ver the tank during cnstructin wrk
Warning 17. T ensure the integrity f the tank is nt prejudiced during installatin, and satisfactry subsequent peratin f the cmplete system, the fllwing precautins are t be strictly bserved: Allw the tank t settle nt the pea-gravel base under its wn weight initially, and the weight f the water intrduced int it Care is t be taken t ensure that site debris/dust is nt allwed t enter the tank during r after its installatin Under n circumstances: Tamp-dwn the infill with machinery Tamp-dwn finished grund level with machinery Drive vehicles ver tanks installed as abve Warning Exceptinal Cnditins/Added Precautins 18. When exceptinal cnditins are experienced, tanks are nly t be installed in accrdance with the design and instructins f a qualified structural engineer wh takes respnsibility fr the integrity f the installed tank. Installatin Tip 19. Installatin f the tank, and effecting cnnectins with the inlet pipewrk, the utlet pipewrk, and the service duct, will nrmally be undertaken by grundwrkers as a part f the undergrund drainage wrks; this wrk shuld als include: Attached: Leaving in-place a draw-crd in the service duct fr subsequent use by the plumber and/r electrician Feeding the 32-mm supply-pipe thrugh the service duct, sectin-by-sectin as the service duct is installed Example Risk Assessment Tank Unlading & On-site Mvements Example Methd Statement Tank Unlading & On-site Mvements Example Risk Assessment Tank Installatin Example Methd Statement Tank Installatin Warning The attachments are examples nly, and need t be adapted by a capable persn t reflect actual site cnditins.
EXAMPLE RISK ASSESSMENT FOR THE DOWNLOADING & ON-SITE MOVEMENT OF RWH STORAGE TANKS Warning: This is an example nly site-specific infrmatin t be added befre use Cmpany Cmpany Address Prject Prject Address Prject Number Assessment Date Review Date Name f Assessr Unique Reference Activity Persn(s) at Risk Health/Safety Hazard Risk Management Residual risk - SEVERITY Residual risk - LIKELIHOOD Unlading and mving RWH strage tank Operatives invlved & ther site persnnel/bystanders Lifting tank frm delivery vehicle Only briefed and authrised peratives t be invlved Lcality t be cleared (f peple and materials), and suitable fr dwn-lading Only the unlading team t be in the prximity f the tank, and are t be kept well-clear f it unless the tank is at rest in a stable and unsupprted psitin) Suitable lifting machinery t be used Tank t be empty f water r ther liquid Suitable lifting chains and D shackles t be used (if tank fitted with lifting eyes) and prperly secured t the lifting eyes If n lifting eyes, suitable lifting straps (and spreader bar if apprpriate) t be used, and prperly attached t the tank 5m-lng Steady-rpes t be fitted t the chains/straps, and manned Test-lift t be perfrmed and C f G f the tank stabilised in relatin t the centre f lift If tank is nt lifting level, chains/straps lengths t be adjusted accrdingly Once the tank can be lifted level and withut swing, it can be mved clear f the delivery vehicle Once clear f the vehicle the tank is lwered t a grund clearance f c400-mm Lw Lw
Health/Safety Hazard Risk Management Residual risk - SEVERITY Residual risk - LIKELIHOOD Mving tank t its installatin lcatin Only briefed and authrised peratives t be invlved Rute f mvement t be cleared (f peple and materials), and suitable fr passage (ie relatively level and with adequate space Tank t be mved at slw walking pace, stabilised thrughut using the steadying rpes Once at the lcatin site the tank t be lwered t the grund and chcked/stabilised, r installed in accrdance with the tank installatin risk assessment and methd statement Lw Lw Authrisatin This risk assessment has been prepared and apprved by: Signed:. Name: Date. Please sign belw and cnfirm that yu are aware f and understand the abve risk assessment. Name... Psitin. Date
EXAMPLE METHOD STATEMENT FOR THE DOWNLOADING AND MOVEMENT OF A RWH TANK Warning: This is an example nly site-specific infrmatin t be inserted befre use Cmpany Cmpany Address Prject Prject Address Prject Number Assessment Date Review Date Name f Assessr Unique Reference Planned Task Activities Unlading and mving RWH strage tanks must be undertaken by briefed and authrised persnnel, and invlves the activities listed belw: Visual inspectin f the tank by an authrised persn, cnfirmatin that it appears t be free f bvius signs f damage, and signing-ff f the delivery nte; WARNING Ensuring the delivery vehicle is psitined in a suitable place fr unlading the tank Ensuring the area arund the vehicle is clear f bth materials and peple (ther than thse invlved in the unlading/mvement f the tank wh are t maintain a safe distance at all time the tank is ther than in a stable and unsupprted state) Psitining and use f a suitable lifting machine Tank t be empty f water r ther liquids Attachment f the tank t the machine using chains and D shackles (if the tank has suitable lifting eyes) r strps (including a lad-spreading bar if apprpriate) Attaching 5m steadying rpes t the chains/strps Test-lifting f the tank t ensure it is stable and hrizntal Adjusting chains r lifting straps as necessary Lifting the tank clear f the delivery vehicle, stabilising it with steady-rpes Once clear f the delivery vehicle, lwering it t a safe height fr mving (c400-mm) Ensuring a clear (f peple and materials) and even rute t the installatin lcatin Lwering the tank n t its installatin base, r the grund as apprpriate Stabilising the tank either in accrdance with the installatin methd statement, r temprarily n adjacent firm grund If the latter, ensuring the tank is stable and marked as a hazard t be avided
Methd t be Used The numbered list belw shws the methd statement fr unlading a RWH tank, and mving it t its installatin lcatin. The main elements are included within this list hwever additinal precautins / requirements may be required n site fr site-specific reasns. 1. Identify, brief and authrise the unlading team 2. Assemble at the unlading pint equipped with apprpriate PPE 3. Identify the unlading psitin, and the rute t be taken t installatin site 4. Ensure that the area arund the unlading pint, the mvement rute, and the installatin site are clear f materials and peple (except thse invlved in unlading & mving the tank) 5. Inspect the cnditin f the tank, and sign-ff the delivery nte 6. Ensure the tank is empty 7. Psitin suitable lifting machine adjacent t the delivery vehicle, with the pint f lift ver the apprximate psitin f the tank s C f G 8. Attach the tank t the lifting machine using: a. Chains and D-shackles, if the tank is fitted with lifting eyes b. Lifting straps, if nt fitted with lifting eyes c. A spreader bar if the tank is en excess f 2m lng 9. Attach 5m steady-rles t the chains r straps 10. Test-lift the tank t ensure it is stable and hrizntal 11. Adjust chain/strap lengths as necessary t level the tank 12. Once stable and level, lift the tank clear f the delivery vehicle, ensuring all lifting team persnnel stay a minimum f 5m clear f the tank until it is next stable and unsecured n a firm surface 13. Once the tank is clear f the delivery vehicle, lwer it t a transprtatin height f c400- mm abve the grund 14. Mve the tank at slw walking pace t its installatin site, keeping it steady with rpes thrughut 15. At the installatin site, install in accrdance with a separate methd statement, r lwer t the grund and secure and erect warning signs Access Required Directed access will be required fr the delivery vehicle Wrking Envirnment Restrictins The wrking envirnment is n a fully peratinal cnstructin site, with all tank unlading and mvement related activities t be undertaken in accrdance with the site inductin briefing. In particular, it is anticipated that pen-excavatin wrks will be taking place arund the tank installatin site, in which lcatin all activities are t be undertaken strictly in accrdance with the site inductin briefing and the verbal instructins f the tank unlading/psitining team. Emergency Prcedures These are t be in accrdance with the site inductin briefing.
Persnal Prtective Equipment The fllwing items f PPE are t be wrn as apprpriate by the tank unlading/psitining team: Operatives Prtective ftwear Hi-viz jacket Prtective glves Hard hat Safety glasses The unlading/psitining team are fully cmpetent, briefed and authrised t undertake the task. Plant, Tls & Machinery The tank unlading/psitining task requires the use f a suitable lifting machine, and suitable lifting accessries such as lifting chains and D-shackles, lifting straps, and a lad-spreading bar. Apprvals This methd statement has been prepared and apprved by: Signed:.. Name: Date. Please sign belw and cnfirm that yu are aware f and agree the abve methd statement Name.. Psitin. Date
EXAMPLE RISK ASSESSMENT FOR THE INSTALLATION OF A RWH STORAGE TANK Warning: This is an example nly site-specific infrmatin t be added befre use Cmpany Cmpany Address Prject Prject Address Prject Number Assessment Date Review Date Name f Assessr Unique Reference Activity Persn(s) at Risk Health/Safety Hazard Risk Management Residual risk - SEVERITY Residual risk - LIKELIHOOD Health/Safety Hazard Risk Management Installatin f a RWH Strage Tank Grundwrkers and ther peratives invlved in the task Need t avid re-wrk due t inapprpriate installatin Befre cmmencing, the Jb Supervisr t check that the planned installatin is apprpriate, bearing in mind: The peratinal characteristics f the tank Grund cnditins (lam/clay etc) Highest water-table expected Need t withstand ther than pedestrian verhead traffic Prximity f nearby fundatins, built patis, earth banks etc During and pst-installatin, ensure: N frce is exerted n the tank t insert it r level it N machinery is used t tamp-dwn backfill The lcatin is fenced-ff t prevent site vehicles ver-driving during ther phases f cnstructin Install fully in accrdance with the step-by-step guide Lw Lw Excavatin activities Only qualified and authrised persnnel t perate digging machinery All ther persnnel t be kept clear f the area unless perfrming a specific task (measuring excavatin depth, fr example), when due precautins are t be taken t avid accidental falls int the excavatin Dig area t be pre-marked, making due allwance fr:
Residual risk - SEVERITY Residual risk - LIKELIHOOD Lw Lw The plan shape f the tank Its alignment with ducts Rm needed t maneuvre and back-fill the tank withut damaging it Banking as necessary t avid side-cllapse Health/Safety Hazard Risk Management Residual risk - SEVERITY Residual risk - LIKELIHOOD Health/Safety Hazard Risk Management Residual risk - SEVERITY Residual risk - LIKELIHOOD Tank insertin activities Only qualified and authrised peratives t be used All nn-essential persnnel t be kept clear General precautins fr mving tanks t be bserved (per separate risk assessment) Grund stability fr lifting machine in prximity t the excavatin t be cnfirmed Tank t be lifted in a stable/hrizntal psitin, using the steady-rpes already fitted Tank t be maneuvred lwered int psitin using the steady rpes nly Visual checks f tank alignment t be undertaken with due care, using a safety harness if apprpriate Lw Lw Excavatin backfilling activities Only qualified and authrised persnnel t be used Backfilling prcess t be fully in accrdance with tank installatin instructins Backfilling material t be intrduced int the excavatin by machinery wherever pssible, but nt fr tamping-dwn purpses When human interventin is necessary, fr tampingdwn fr example this is t be undertaken with due care, using a safety harness if apprpriate Lw Lw Apprval This risk assessment has been prepared and apprved by: Signed:. Name:.. Date Please sign belw and cnfirm that yu are aware f and understand the abve risk assessment. Name... Psitin. Date
EXAMPLE METHOD STATEMENT FOR THE INSTALLATION OF A RWH TANK Warning: This is an example nly site-specific infrmatin t be added befre use Cmpany Cmpany Address Prject Prject Address Prject Number Assessment Date Review Date Name f Assessr Unique Reference Planned Task Activities Unlading and mving RWH strage tanks must be undertaken by briefed and authrised persnnel, and invlves the activities listed belw: Taking delivery f the tank (if nt already n site) Unlading the tank and transprting t the lcatin it is t be installed (see separate risk assessment and methd statement abve) Marking ut the installatin lcatin, ensuring alignments with the water ingress and verflw ducts, and the services duct Digging the excavatin t the crrect depth, psitin, alignment and size Prviding a bed fr the tank at the base f the excavatin Installing and levelling the tank Part-backfilling the excavatin Making the ingress, verflw and service duct cnnectins Fitting the dme and lid, and the neck extensin (if required) Cmpleting the backfill t finished grund-level Establishing a prhibitin zne fr subsequent vehicular traffic Methd t be Used The bullet-pint list belw shws the methd statement fr installing a RWH tank; all main elements are included within this list, but additinal precautins/requirements may be required n site fr site-specific reasns: Arrangements shuld be made fr the tank t be delivered, cincident with the day it is due t be installed; with this in mind, when delivery is expected ensure: Suitable access and parking arrangements have been made fr the delivery vehicle Plant is available t unlad the tank A clear rute has been designated between the delivery vehicle and the installatin site The installatin site is level and clear f bstacles and site debris and, ideally: The water ingress pipewrk is cmplete and ready fr cnnectin
The water verflw pipewrk is cmplete, ready fr cnnectin, and is itself cnnected t the surface water management system (sakaway, strm-drain r attenuatin as apprpriate) The service duct is ready fr cnnectin Befre starting the installatin, cnfirm n added precautins apply; ie, there is n requirement t: Install in heavy clay (in which case minimum cver ver tank bdy f 1-metre Install in a high water table (in which case, again, 1-metre f cver) Carry the weight f vehicular traffic (in which case structural engineer s design required) Clser than 4-metres t adjacent fundatins (structural engineer needed) Install adjacent t an earth bank r raised pati (structural engineers needed) Install with cver f less than 1-metre r mre than 1.4-metres (structural engineer needed) Cmplete and sign-ff a risk assessment Cmplete and sign-ff the methd statement Calculate depth f by using the psitin yur rainwater pipe (the pipe which takes yur water frm yur rf t the tank) as a datum. Allw an additinal 50mm depth fr a pea gravel bed belw the tank Line-mark dig area, allwing fr: Alignment f tank water entry and exit cnnectins, and the service-duct cnnectin (Tank plan-view dimensins) + (300-mm fr tank maneuvre/access) + (a suitable allwance fr battering depending n grund cnditins) Dig the excavatin, anticipating that grund water ingress may be experienced in the prcess; if necessary, keep water interference t a minimum by use f a pump Bed the bttm f the excavatin with 50-mm f 10-mm washed pea-gravel Psitin tank n the pea-gravel base, and check vertical and hrizntal alignments between tank cnnectrs and the drainage runs/service duct, allwing fr 10-mm f tank settlement at the next step Fill 1/3 rd full f water t settle tank int the pea-gravel, and bring cnnectrs and pipewrk int final alignment Cnnect all pipewrk (ie rainwater-in, verflw-ut, and service duct) Install neck and lid t ensure that n backfill material can enter the tank Backfill arund the tank bdy and sides f the excavatin with mre 10-mm washed pea-gravel up t the level f the water inside the tank Fill the tank with water t the level f its inlet/utlet cnnectins Cntinue backfilling the tank with pea gravel until the crwn f the tank is cvered with 10-mm f pea gravel Backfill t finished grund level with free-flwing material Once the installatin is cmplete and the tank cnnected: Install filter (if nt already installed) Seal filter with strng plythene (t prevent rf water entering the tank until the whle system is ready t be handed-ver t the end-user) Secure the tank lid Mark ut an exclusin zne 2-metres utside the riginal excavatin ftprint t prevent site vehicles accidentally driving ver the tank during cnstructin wrk
Warning 20. T ensure the integrity f the tank is nt prejudiced during installatin, and satisfactry subsequent peratin f the cmplete system, the fllwing precautins are t be strictly bserved: Warning Allw the tank t settle nt the pea-gravel base under its wn weight initially, and the weight f the water intrduced int it Care is t be taken t ensure that site debris/dust is nt allwed t enter the tank during r after its installatin Under n circumstances: Tamp-dwn the infill with machinery Tamp-dwn finished grund level with machinery Drive vehicles ver tanks installed as abve Warning Exceptinal Cnditins/Added Precautins 21. When exceptinal cnditins are experienced, tanks are nly t be installed in accrdance with the design and instructins f a qualified structural engineer wh takes respnsibility fr the integrity f the installed tank. Access Required Directed access will be required fr the delivery vehicle Wrking Envirnment Restrictins The wrking envirnment is n a fully peratinal cnstructin site, with all tank unlading and mvement related activities t be undertaken in accrdance with the site inductin briefing. In particular, it is anticipated that pen-excavatin wrks will be taking place arund the tank installatin site, in which lcatin all activities are t be undertaken strictly in accrdance with the site inductin briefing and the verbal instructins f the tank unlading/psitining team. Emergency Prcedures These are t be in accrdance with the site inductin briefing.
Persnal Prtective Equipment The fllwing items f PPE are t be wrn as apprpriate by the tank installatin team: Operatives Prtective ftwear Hi-viz jacket Prtective glves Hard hat Safety glasses The installatin team are fully cmpetent, briefed and authrised t undertake the task. Plant, Tls & Machinery The tank installatin task requires the use f a suitable lifting machine, and suitable lifting accessries such as lifting chains and D-shackles, lifting straps, and a lad-spreading bar. Apprvals This methd statement has been prepared and apprved by: Signed:.. Name: Date. Please sign belw and cnfirm that yu are aware f and agree the abve methd statement Name.. Psitin. Date