The Green Guide to Boat Washdown Systems

Transcription

1 The Green Guide to Boat Washdown Systems heading The Green Bue Making the environment second nature A joint BMF and RYA Initiative Photo courtesy of Aex Watkins

2 Green Guide to Boat Washdown Systems Introduction The washing down of a boat is a key eement in a reguar maintenance programme. For many years, boats have been washed down and the run-off water has usuay been aowed to run back into the nearest watercourse unchecked and untreated. As greater attention is paid to water quaity in the UK, driven to a arge extent by European egisation such as the Water Framework Directive and the Marine Strategy Framework Directive, so interest is increasing in washdown equipment and faciities which contain and fiter the run-off. These systems are being instaed in boatyards, marinas and harbours around the UK. In other parts of the word where water quaity egisation is stricter than here (notaby in parts of the USA) such systems are commonpace. This guide is intended for marina operators, harbour authorities, boatyards, oca authorities and port authorities who are considering instaing washdown faciities. It aims to set out: Why a washdown system might be needed The ega framework What to consider when instaing a washdown system The types and makes of system avaiabe, together with detais of how they work Case studies of some systems aready instaed in the UK Why a washdown system might be needed? When boats are washed-down and scrubbed, with or without a high pressure hose, the run-off water usuay contains a variety of poutants, incuding paint fakes and chippings, dissoved heavy metas (usuay copper from antifouing), residues from ceaning chemicas used on hus and topsides and, increasingy, non-native species such as Didemnum vexium more commony known as Carpet Sea Squirt. Without any kind of containment or fitration system, this pouted water can fow into a nearby watercourse either directy or via a surface water drain. There, the contaminants in the water can accumuate in bottom sediment or enter the food chain causing harm to aquatic ife, contaminating the sea / river bed and reducing water quaity. The probem of buid up of contaminants becomes more acute in weak tida estuaries and rivers, as we as within ocked basins and marinas and since many boatyards and marinas are ocated within areas that have conservation designations attached to them, any harm caused to widife can mean the finger of suspicion quicky being pointed at the recreationa boating sector. Areas of sit adjacent to boat yards or any washdown area wi often experience higher eves of contamination due to residues being washed back into the water. This can cause probems if any dredging is required since a dredging disposa icence is more ikey to be refused and / or costs of dredging an area with contaminated sit wi be extremey high. Non-native species can attach themseves to boat hus and are removed as part of the washdown process. If they are washed straight back into the water, fragments can survive and re-estabish themseves. One of the key ways to stop the spread is to capture any fouing that comes off the bottom of a boat and dispose of it on and. As a further consideration, washing down boats uses arge amounts of fresh water and despite recent wet summers, water as a commodity is becoming more expensive and there have been restrictions on water use in some parts of the country due to drought conditions in recent years.

3 Green Guide to Boat Washdown Systems The Lega Framework Under the Water Resources Act 1991 it is an offence to aow any pouting, poisonous or noxious materia (incuding soid waste matter) to enter a controed water, without a consent. Controed waters incude a watercourses, canas, most akes and reservoirs, estuaries, ochs and coasta waters out to three mies (surface waters) and water contained in underground strata known as groundwater.) This egisation appies irrespective of whether the substance was deiberatey or accidentay reeased. The key eement of this egisation is that it is an offence to cause or knowingy permit a water discharge activity uness you are compying with an environmenta permit or exemption. Things that count as water discharge activities incude: discharging poisonous, noxious or pouting matter or soid waste matter into inand freshwater, coasta waters and reevant territoria waters. discharging trade or sewage effuent into inand freshwater, coasta waters and reevant territoria waters Discharge Permit Washdown water contaminated with antifouing residue or other chemicas is considered to be trade effuent and may be cassified as hazardous waste (depending on concentrations of substances contained within it). Commercia faciities producing this kind of run-off require a Discharge Permit from the reevant environmenta reguator to aow them to discharge this water back to a watercourse. Engand - Environment Agency Scotand - Scottish Environment Protection Agency Waes - Natura Resources Waes Northern Ireand - Northen Ireand Environment Agency Trade Effuent Consent The Water Industry Act 1991 states that any iquid produced whoy or in part from any trade or business activity carried out on trade premises quaifies as trade effuent and therefore requires consent from the sewerage provider to discharge this effuent to the fou sewer. European Directives There are two European Directives that are potentiay reevant to boat washdown. The EU Water Framework Directive, adopted in October 2000, aims to ensure that inand water bodies and coasta waters out to 1nm achieve good ecoogica status by The EU Marine Strategy Framework Directive, adopted in Juy 2008, requires member states to deveop marine strategies in order for European seas to achieve or maintain good environmenta status by The WFD overaps with MSFD in coasta waters. Both Directives are designed to improve and protect water management and water quaity. The main difference is that WFD focuses on the chemica and ecoogica status of coasta waters whereas the MSFD covers a broader range of pressures incuding noise and itter. Athough the impacts of recreationa boating have been shown to be reativey minor within the context of both Directives, it is in the sector s interest to be as proactive as possibe to minimise any impact on the environment and in doing so avoid any restrictions the Directives may pace on boating activities.

4 Green Guide to Boat Washdown Systems What to consider when instaing a washdown system Instaing a washdown system can invove significant cost and potentiay some disruption to business as usua whie the infrastructure is instaed. The foowing factors shoud be taken into consideration when deciding what type, size and scae of system might be the most appropriate for your faciity: 1. Cosed oop or discharge to fou sewer or water body A cosed oop system is one that re-uses the wash water once it is in the system. The water storage tank is fied with either mains or rainwater, used for washdown, fitered and / or treated and then it goes back into the storage tank again for re-use. Of course evaporation wi occur so the tank wi need to be topped up but the key point is that no washdown water even treated water - is discharged to either the fou sewer or back into a nearby water body. If you woud prefer to discharge the washdown water then you have the option of discharging to either the fou sewer (for which you need a trade effuent consent from your sewerage company) or to a nearby water body (for which you woud need a discharge permit from the reevant Environment Agency). Both the sewerage company and the Environment Agencies are ikey to want to see water quaity tests so that they know what is being discharged. For water to be discharged back to a water body, it may need to be fitered and treated. It is ikey that the sewerage companies wi accept ower quaity water since they wi then treat it at a sewage treatment works. Within a cosed oop system, the water does not need to be as cean if it is primariy being used under high pressure to remove fouing, rather than as rinse quaity water. If rinse quaity water is required, then you may want to consider suppying this fresh from mains or from a separate rain water coection system. It is worth taking into account the current ocation of the nearest fou sewer when ocating the washdown faciity to avoid undue expense connecting to the fou sewer. 2. Space avaiabe To some degree, the decision as to whether or not to choose a cosed oop system wi depend on the space you have avaiabe. A cosed oop system wi generay require more space because a storage tank wi be needed athough the size of this can aso be scaed dependent on the anticipated number of boats that wi be washed down and it can be sited underground. A system that discharges to the fou sewer or back to the water wi require ess space. The commerciay avaiabe systems generay require some form of housing for the recaim unit, the pumps and the fiters and these vary in size from a 1.5 x 1.0 x 1.2 metre meta cupboard to a sma (20 foot) shipping container measuring 6 x 2.4 x 2.6 metres. Space wi aso be needed for a washdown pad, a settement tank, the jetwash equipment (if used), and pumping equipment. 3. Extent of groundworks necessary Every system, whether a commerciay avaiabe one or a bespoke design, requires some form of wash pad from where water can be coected, ready for fitration. Usuay these are concrete pads which may have a sma ip around the edge to stop water escaping and / or are cambered to aow water to drain through an interceptor or grie and into a sump / settement tank. Many of the systems require a settement tank as the first stage of fitration. Washdown water runs through an interceptor or a grie (to remove arge partices and biofouing) and then drains into a settement tank where the water sits for a period of time to aow materia suspended within the water to sette. This kind of tank can either sit beow ground (in which case excavation beneath or near the wash pad wi be necessary) or above ground, in which case a pumping unit wi be necessary to get the water from the drain beneath the wash pad into the settement tank. Much of the soid matter washed from boats wi not enter the settement tanks and fitration system, and shoud be swept up and disposed of into an appropriate waste container, usuay as hazardous waste.

5 Green Guide to Boat Washdown Systems 4. Budget The cost of a washdown system wi depend on the size of the faciity wishing to insta it, how many boats need to be washed down, the extent of the groundworks required and the number and compexity of the fiters used to treat the water. Some of the systems instaed in the UK are off the shef units, but wi require the anciary infrastructure necessary to operate them (such as wash pad, settement tank, pumping chamber, jet wash). Others are suppied as a compete soution whie some boatyards and marinas have gone for bespoke systems that meet their precise needs and space requirements. As a very rough guide, a smaer system catering for around 200 boat wash downs per year and with minima groundworks may cost around 15,000. A arger system, with significant groundworks (incuding underground tanks) woud cost more in the region of 40,000 50,000. In addition to the capita cost of the washdown system, you aso need to consider running costs. These incude the cost of the water (very ow if a cosed oop / rainwater system is used), cost of energy to run the system, fiter changes (carbon fiters in particuar can be very expensive), emptying of interceptors and settement tanks and remova of materia by a icensed hazardous waste contractor and the cost of any coaguants, foccuants, odour contro chemicas and water conditioners that may need to be added to the system. 5. Likey number of boats to be washed down The number of boats requiring washdown wi aso inform the size (and therefore price) of the system you wi require. With fewer boats to wash, a smaer system can be instaed as the amount of water being used wi be ower so the size of settement tanks, water storage tanks etc. can be reduced. To some extent the intensity of use is as important as the tota number of boats being washed. If a sma system is used intensivey during the autumn for exampe, then reasonaby sized tanks wi sti be needed to aow for a high frequency of use over a short period. If a arge number of boats are to be washed down, then a two person jetwash system is more ikey to be needed, which produces higher runoff rates, requiring a arger fitration unit and tanks. 6. Use of the system by boat owners or marina staff Some yards with washdown systems aow customers to use the washdown themseves, and some restrict use to trained operatives ony. Costs to customers are reduced if they can use it themseves (and some systems aow a customer s own pressure washer to be attached) and the faciity can potentiay be made avaiabe for onger operating hours. The downside to not having trained staff using it is that if fiters get bocked, pumps stop working, or any other technica probem arises, damage may be done to the system if peope are not aware that it is not operating propery. 7. Types of system avaiabe The foowing section sets out six avaiabe systems in the UK and gives detais of how they work, approximate costs and where they are instaed. Most of the suppiers responded to a questionnaire about their products so for ease of comparison, the questions are repicated for each suppier. Where information was gathered direct from an instaed site, rather than from the suppier, this is made cear. Bastgreen Ceenife Fitabund Kirton MarineKeen Morcean

6 BLASTGREEN Instaed at Batson Boat Park, South Hams District Counci, Sacombe 1 What type of system is it? The BastGreen system is cosed oop so a wash water is treated and re-used. Are groundworks required? No the system at Sacombe uses two portabe, bunded agoons which can be paced on any fat surface. After three years of successfu operation Sacombe are now going to insta a concrete pad with a settement tank underneath. How is runoff coected? Currenty the washdown water is coected inside the agoons and then pumped away to a reception tank where it goes through a micofibre sock before going through the fiters. How many stages of fitration are there? There are three main fitration stages after the water has passed through the initia microfibre sock to remove arger partices. The fiters are arranged as two separate systems so that one system can be backwashed whist the other is in operation. The carbon fiter at Sacombe is not routiney used as the wash water generay does not contain hydrocarbons. How much does the system cost to insta? The Sacombe system which was very much a prototype cost around 40,000 to put in pace. How much are annua running costs? Fiter repacement costs 1,000 2,000. The system has just competed its third year and fiters have been ceaned to try and get them to operate for a second season. How much space is required? A 20 foot shipping container is required to house the recaim system and tanks. The agoons are portabe. What is the capacity of the system i.e. how many boats can be ceaned per day? The Harbour Authority routiney programme five boat ifts per working day. The boat remains in the hoist unti ceaned before being chocked to its fina winter storage position. At Sacombe around 150 boats per season are washed down. How is any soid hazardous waste removed and disposed of? Soid waste can be removed from the agoons and from the fiters for correct disposa by icensed waste carriers. Does the system remove dissoved heavy metas? The Myceex resin towers wi remove a harmfu heavy metas and hydro carbons. Can it run on rainwater? Yes Have water quaity tests been conducted on the fitered water? Unknown How often do fiters have to be repaced? At Sacombe the fiters are changed once per season. 1 Some information on this system gathered from conversation with Sacombe Harbour Master

7 Case study Batson Boat Park, Sacombe Sacombe Town Car Park at Batson has, for many years, been used for boat storage during the winter months. In 2010 South Hams District Counci decided to insta a washdown system due to growing concerns about the amount of pouted washdown water that was entering the estuary. The Bastgreen scrubbing system has been provided principay for environmenta reasons. With the increasing awareness of the environmenta impact of boating on the fragie ecosystems of the Estuary, there is a increasing awareness amongst the boat owning fraternity that it is no onger acceptabe to wash boats off and aow the residue to go straight back into the water. Sacombe is a Site of Specia Scientific Interest (SSSI) and therefore care must be taken to protect both water quaity and the seabed. Bastgreen - working cosey in partnership with the Sacombe Harbour Authority - devised a system which prevents the residues from pressure washing activities entering the estuary ecosystem. Adrian Kingsand, Saes Manager at Bastgreen, commented From our initia discussions with Ian Gibson (Sacombe Harbour Master) the brief was chaenging, in effect the creation of a system to capture, contain and remove any contamination from the water used for power washing activities, i.e. a "Cosed Loop System". No prototype is ever perfect and the assistance and feedback we have received from the Sacombe Harbour staff has proved invauabe. A hoist sips the vesses on the sipway and drives them to the scrubbing system where the hu is power washed before the Subift parks the boat in its crade for the winter. The contaminated run off from the power washing of the hu is coected in a agoon and is then pumped through an extensive fitration process, the water is then reused. The system is fitted into a 20ft shipping container and has a arge water storage tank which is fied at the start of the season. This water is suppied to the pressure washers from this tank. The first ine of defence in the Bastgreen system is two semi-permanent agoons which can be packed away at the end of the season. Buit from heavy duty poyethyene materia, these agoons incorporate a tough, water fied coar. Subifts and boat traiers drive easiy over and into these sumps, for washing, aowing the contaminated water to be coected. The foued water from the agoons is then pumped through a number of fiters incuding UV back to a hoding tank. The Fiters are arranged as two separate systems so that one system can be backwashed whist the other is in operation. Any arge marine or paint partices can easiy be coected, removed, dried and disposed of. The attraction of the Bastgreen system is that it is portabe and sef contained. A that is required is a fat smooth area to ayout the agoons and the container, a 240v suppy which coud be a generator and a convenient water suppy to fi the tank and top it up as required. The scrubbing system aso has the benefit of keeping the boat park cean and tidy; a the power washing arisings are contained in one area and not spread across the boat park. Scrubbing off as the boats are sipped does sow down the sipping process a itte, but the advantages consideraby outweigh the disadvantages.

8 CLEENLIFE Avaiabe through ASAP suppies Instaed at: Gaeon Storage and Mooring, Fiters aso used at Cox s Boatyard What type of system is it? The system can work in both ways. It was predominatey designed to be a cosed oop system which removes Hydrocarbons and suspended Heavy Metas which are in particuate format because the discharged water coud sti contain some Dissoved Heavy Metas (DHM). Are groundworks required for this system? Yes, ground works maybe required as two drains wi be needed in the wash down area - one for the wash down water to drain into and aso a arger one for the coection sump. How is runoff coected? The runoff water is coected through the first drain and is then coected into the coection sump. How many stages of fitration are there? The first stage is a very coarse fiter. There are then two main fitration stages: Stage 1 is an 80 Micron washabe fiter insert to remove arge partices Stage 2 is the MyCex infused eement which captures any hydrocarbons and aso any suspended heavy metas. How is any soid hazardous waste removed and disposed of? The first stage fiter can be removed and ceaned. Residue ceaned off wi need to be disposed of by foowing the oca aws for the disposa of Hazardous Waste. Any hazardous waste that is coected by the 2nd stage eement is coected onto the eement and when this eement is at fu capacity this wi need to be removed and disposed of in the same way (pease note that this eement is hydrophobic meaning that it wi not coect any of the water). Can it run on rainwater? Yes Have water quaity tests been conducted on the fitered water? Yes tests have been carried out for the Broads Authority. How often do fiters have to be repaced? There are no set rues on this as it wi entirey depend on how much contamination is disodged during wash down and how dirty the water/boats are. A visua inspection shoud be made before every use. The second stage fiter works from the inside out so a quick ook at the top of this eement wi give you an idea of how fu the eement is becoming. How much does the system cost to insta? We do not insta the unit but the average cost for the unit is each. How much are annua running costs? The main item that may have an annua running cost woud be the 2nd stage fiter eement. These retai at How much space is required? The fiter units can be permanenty mounted needing a space of 500 mm wide X 750 mm ta but they coud aso be mounted on to a troey. What is the capacity of the system i.e. how many boats can be ceaned per day? This wi entirey depend on how big the boats are, how dirty they are and aso how big the coection drains are etc. Does the system remove dissoved heavy metas? The water that comes through the discharge ine may sti have some dissoved heavy metas (DHM). A third stage fitration has been ooked into that wi remove these entirey but due to other circumstances this has not been reeased at present. This is subject to a patent appication.

9 Case study Cox s Boatyard, Norfok During 2012 Cox s Boatyard in Norfok designed and instaed their own bespoke washdown system. Eric Bishop, the boatyard manager devised a cosedoop system that uses rainwater from the boatyard s roof for boat washdown, which is then passed through a set of purifying fiters. The ceaned water can then be used again or discharged safey into the Broads. The system coects rainwater and stores it in a 6250-itre tank, from where it is piped to an area used for pressure washing. Boats that need ceaning are suspended from the yard s crane, which can ift up to 9.5 tons, and positioned above a arge concrete pad, with anged sides that funne the run-off water into a sma, centra drain and tank. Here water-borne partices and debris, as we as invasive species such as the so-caed kier shrimp (Dikerogammarus viosus) sette out from the main body of coected water and sink to the bottom. Kier shrimps are aggressive predators that prey on native shrimps and young fish, and they have recenty been found in Barton Broad, so any system that heps to prevent their spread has great environmenta importance. Once the arger debris is removed, an automatic pump sends the wastewater via a pipe to a itre storage tank, which is situated aongside the rainwater tank. When this second tank is twothirds fu, the water is pumped at a rate of 85 itres per minute though two fiters, which are reusabe and washabe, to remove any remaining poutants. The fiters were suppied by ASAP suppies ( The pure, fitered water can then be re-used or returned to the river, meaning that even in a drought when there is itte or no rainwater, there is aways an ampe suppy of water avaiabe for washing down the boats. Neither does cod weather cause any probems, as a the pipes and cabes have specia heat cabes fitted to them to stop them freezing. Eric Bishop says: The system is part of a major eight-phased deveopment pan for the boatyard and we are keen to impement any systems that hep preserve the future of the Broads for both widife and for boat owners. It took ony five weeks to insta, and it is aready doing a great job. We are ooking forward to further improving our services to boat owners in the future. This system cost around 20,000 to insta and was party financed with a grant from the Broads Authority.

10 FILTABUND Instaed at: Toesbury Marina, Emsworth Yacht Harbour What type of system is it? FitaBund Tota System Soution is a muti-stage, combined water coection, processing and recycing faciity for washdown of boat hus. Rainwater is harvested to ensure a fu tank of suppy water is aways avaiabe. Wash water is processed and returned to the tank for reuse (cosed oop system). If the suppy tank is fu, rainwater is diverted to the marina, or sewer (if avaiabe). Are groundworks required? No groundworks are required. A parts of system are surface mounted & semi-permanent. How is runoff coected? Runoff is coected on the suppied raised patform bund, which can support up to 10 tonne axe oad as standard (arger oads accommodated with bespoke design). Larger hoists can drive each side of the bund with no weight imit. How many stages of fitration are there? Nine How often do fiters have to be repaced? Activated Carbon repaced every 2 months (approx. 65). Limestone repaced every 6 months (approx. 40). Geotextie surface repaced every 2 years (costs dependant on size of system) How much does the system cost to insta? This depends on size of system, but typicay between 14k and 25k. The price incudes fu system suppy, insta, commissioning and 2 years of consumabes. How much are annua running costs? Approximatey 1500, which incudes repacement of geotextie surface every 2 years, annua service and fiter media. With water saving of approximatey 300, annua running costs are around How much space is required? It depends on bespoke design and space avaiabe. Typicay, the bund woud be anything from 6m x 4m to 12m x 6m. Externa processing units require approximatey 2m² of space. What is the capacity of the system i.e. how many boats can be ceaned per day? No imit for norma yard operations (i.e. singe hoist operating throughout day). How is any soid hazardous waste removed and disposed of? Swept up from the geotextie surface and disposed of as hazardous waste. Does the system remove dissoved heavy metas? Yes Can it run on rainwater? Yes Have water quaity tests been conducted on the fitered water? Yes. 6 months of fortnighty aboratory testing has been carried out at our demo site for copper, zinc and ph. Periodic monitoring of suspended soids, chemica oxygen demand, tota hydrocarbons and other chemicas. Resuts are comparabe to UK industry standard maximums for tap water for tested contaminants.

11 Case study Toesbury Marina, Essex Toesbury Marina had been considering the instaation of a boat washdown faciity for severa years, particuary as it is a desirabe requirement of The Yacht Harbour Association s God Anchor Award Scheme. Toesbury had aso been ooking at a aspects of their interna housekeeping and educationa programme, to ensure that they minimize a aspects of waste - andfi, power resources, and coasta poution. Manager, Juian Godie, had been aware that many conventiona washdown systems required expensive capita deveopment, and had been keen to expore the aternatives. It was therefore timey that he earned from the BMF that a new system Fitabund - was to become avaiabe and decided to invove Toesbury as a potentia site for a new joint venture. FitaBund is an above ground fitration system requiring no groundworks, onto and above which boats can be pued straight out of the water ready for pressure washing. For Toesbury it represented an affordabe and unique "turnkey" soution for the coection and treatment of washdown water. It consists of a high strength (up to 20tonne axe oad) surface mounted bund that sits beneath the boat and a separate mutistage fitration and processing modue. Washwater that fas onto the bund passes through a mutiayer geotextie surface that removes paint partices, marine debris, oi and biofouing such as non-native species. The water then passes through a further oi separation baffe to a sump, where it is pumped to the externa fitration modue. The fitration modue contains mutipe processing stages, incuding imestone and activated carbon to remove dissoved metas and a sand fiter for micro partice remova. Water is then coected in a tank for reuse. The system aso harvests rainwater that fas on to the bund to ensure a continuous suppy of fresh water. UV technoogy kis bacteria and the entire system can be soar or wind powered to provide additiona power saving. Juian is deighted that the system has been the subject of very positive interest from key stakehoders (incuding the Environment Agency, a eading marine coatings company, severa arge marina groups, as we as a number of independent marinas, from a over the country) and a have spoken highy of both the design and the quaity of the buid. Juian commented: We have been more than satisfied with the system. It is robust, ow maintenance, and fundamentay removes the risk of antifouing contaminants returning to the water. In the ong run, we hope that more boat owners wi be attracted to marinas and boatyards that show a responsibe answer in avoiding water poution through antifouing run off. It has the added benefit of re-using washdown water, and hence wi reduce overheads. I fee that we shoud aways embrace these new ideas that wi in turn preserve the environment for future generations of boaters.

12 MARINE KLEEN Instaed at Yarmouth Harbour, Ise of Wight 2 What type of system is it? This is a cosed oop system. Are groundworks required? Groundworks were required for the system at Yarmouth athough it was instaed as part of a major harbour works programme. Concrete wash pad and settement tanks are needed in addition to the recaim unit itsef. How is runoff coected? Water from pressure hosing fas onto the concrete pad and runs through an interceptor into a coection chamber. From there it goes to a settement tank. How many stages of fitration are there? There are five stages of fitration: 1. Coarse fiter mesh 2. Settement 3. Partice fiter 4. Activated carbon fiter 5. Further partice fiter How much does the system cost to insta? The recaim unit costs between 15,000 and 20,000. At Yarmouth the tota cost of the system was around 50,000. This incuded the cost of the concrete pad, a the ground works (incuding underground storage and settement tanks) and the recaim unit itsef. How much are annua running costs? dependant on usage. How much space is required? The foot print of the above ground equipment is 800mm x 1600mm What is the capacity of the system i.e. how many boats can be ceaned per day? 5-10 boats can be ceaned per day. Larger capacity systems are avaiabe. How is any soid hazardous waste removed and disposed of? Soid waste is removed from the settement tank and disposed of via a icensed waste contractor. Does the system remove dissoved heavy metas? This system can be engineered to remove dissoved heavy metas as an optiona extra. Can it run on rainwater? Yes, rainwater can be used for topping up prior to fresh water use. Have water quaity tests been conducted on the fitered water? Tests have not been done on water from this particuar system. How often do fiters have to be repaced? It depends on usage but normay every 3 6 months. 2 Information on this system gathered from site visit to Yarmouth Harbour and discussion with Yarmouth Harbour Master as we as from the manufacturer

13 Case study Yarmouth Harbour Yarmouth Harbour Commissioners (YHC) chose to insta a washdown faciity in 2013 as there were no faciities in pace and there was concern about pouted water, particuary from antifouing paint, being washed into the harbour when boats were pressure washed on the quayside. As the harbour was undergoing a redeveopment it was an idea opportunity to insta an integra washdown faciity. YHC aso fet that the need for a faciity woud be compusory in the future so were keen to insta it in anticipation of that responsibiity. A arge fitration tank had to be buried underground but there was an opportunity to do this as part of the groundworks when the harbour was being redeveoped. There were a few initia teething probems, for exampe one of the pumps was not stainess stee so it had to be repaced. When instaing a system ike this it is important to ensure the connections to the drainage / sewerage system are correct and appropriate. If these are not done correcty then heavy rain may have a detrimenta impact on the system. Without much guidance and imited choice it was very difficut to decide which system to insta. YHC chose this system because space is imited on the quayside and the structure above ground is reativey sma. The size of the box required aows YHC to use the area for other activities such as ifting out with the crane and genera maintenance. This appeared to be the most suitabe system for Yarmouth even though it was the first time that the company had instaed such a system for the marine sector. Their previous experience was with vehice washdown systems inand. The suppier is part of a much arger organisation with financia stabiity and had a tried and tested maintenance team in pace, both were key factors in YHC s decision. The faciity is easy to operate and is being used by boat owners, contractors and harbour empoyees. It has had a positive response and is a big improvement because it is the first time such a faciity has been instaed. Boats are brought ashore by a new crane (maximum oad 5 tonnes). Due to heath and safety impications, the use of the crane is imited but the washdown faciity can be used by anyone with permission from Harbour empoyees.

14 MORCLEAN Instaed at: Dover Marina What type of system is it? Morcean suppy mechanica washdown systems which can be either cosed oop or can discharge to fou sewer where connections exist and consents obtained. Are groundworks required? A pad is needed with a sma sump on / under the pad. Water storage tanks can be surface mounted (as at Dover Marina). A sma pumping chamber is aso required to pump water from the sump above ground. Morcean try to keep equipment above ground in marinas as excavations near water are often compicated and costy. How is runoff coected? Washdown water fas onto the pad (which has a sma bund around it, or can be soped towards sump). The water goes through an interceptor into the settement tank. How many stages of fitration are there? 1. Settement within interceptor / settement tank 2. Water pre-treated dosed with coaguants and water conditioners 3. Hydrocycone and muti cycone treatment water is spun to remove suspended soids (hydrocycone for ow voume use and muti cycone for high voume use) 4. Water passed through carbon fiters to remove coouration and detergents How often do fiters have to be repaced? As a rough guide, every 6 months but it depends on use How much does the system cost to insta? For the actua unit itsef: 6-8,000 for sma system, 18-20,000 for a arger system depends on usage and frequency. To insta a fu system into a sizeabe marina woud cost in the region of 30,000 (not incuding groundworks) but incuding 2 person pressure washer, recaim unit, interceptor, storage tank, remote contros, sit trap, pumping chamber, hoses. A smaer system woud cost in the region of 15,000. However cost is extremey site specific. How much are annua running costs? This very much depends on wash quantities and frequencies servicing, energy, water, fiters, emptying of interceptor, coaguants and conditioners How much space is required? 3m x 1.2 m for recaim unit at Dover. Pus 6 cubic metres for the settement tank. 1.5 x 1.2 for a smaer system pus same size settement tank. The whoe recaim unit wi sit in a housing typicay 3m x 3m What is the capacity of the system i.e. how many boats can be ceaned per day? No fixed capacities it can be scaed. How is any soid hazardous waste removed and disposed of? The carbon fiters are removabe and repaceabe. The interceptor needs to be emptied and contents removed by icensed waste carrier if necessary a hazardous waste carrier. Does the system remove dissoved heavy metas? No Can it run on rainwater? Yes it can be topped up with rainwater Have water quaity tests been conducted on the fitered water? Yes

15 Case study Dover Marina The Port of Dover works hard to provide a high standard of environmenta performance in a of its activities. Its practices and standards are independenty assessed on an annua basis for compiance with the internationay recognised ISO14001 standard for Environmenta Management. This makes Dover Marina the ony marina in the UK to be certified to ISO14001, a standard requiring continuous improvement in environmenta performance. Environmenta impacts at the Marina have been successfuy reduced through measures to reduce energy and water consumption, minimise waste and prevent poution. Targets are set against a of these aspects each year. The Port of Dover is aso a Carbon Trust Standard Bearer and the carbon footprint of the Port has been reduced year on year since Over 95% of the waste disposed of at the Port of Dover has achieved andfi avoidance through recycing and energy from waste practices. In August 2011, a new boat washdown system was instaed at the Port of Dover s Marina. This system is state of the art technoogy and is a vauabe addition to the Marina. Using environmentay friendy fitration techniques, it aows 95% of the water utiised to be recyced. The effuent created is deat with by our state of the art hydrocycone and fitration system which prevents debris from draining back into the harbour and removes the resutant poutants and protects our water courses. With the boat suspended in the marina, it is jetwashed with water fed from a storage tank via a booster pump. Dirty water drains through a series of setting, hydrocycones, sand and carbon fiters removing a impurities, finay passing to a arge chamber from which the fitered, now cean, water is automaticay deivered back to the jet wash. The new boat wash system demonstrates the Port s commitment to providing state of the art faciities for the benefit of its marina customers whist at the same time iustrating the Port s continuous efforts to improve and buid on its environmenta performance in every aspect of the business.

16 KIRTON SERIES SEA CLEAN 1 What type of system is it? This is a cosed oop system where the fouing is removed and the water is captured, fitered and recyced for reuse. Are groundworks required? The water from the wash area wi need to be coected in a pit or sit trap that incudes a mesh screen to stop mouscs and arger partices before it overfows into a 3 stage interceptor to sette out finer partices and to neutraise the high akaine detergents if used. Beow ground pipes are then required to transfer the water from the interceptor up to an above ground treatment pant. How is runoff coected? See above How much does the system cost to insta? 14,000 incuding a sit trap, 6000 itre interceptor, recaim, deivery and fina instaation. How much are annua running costs? The system is designed to run from a domestic 230 vot socket. Costs however wi depend on running time, frequency of fiter changes and any maintenance ca out costs. How much space is required? The above ground system measures 1.2m x 1.2m x 1.5m high. What is the capacity of the system i.e. how many boats can be ceaned per day? The recaim wi treat and fiter the water at the same fow rate as the jet wash unit so wi run as ong as is required. How many stages of fitration are there? The water passes through a course screen, settement, muti cycone fitration, activated carbon and 20 micron cartridge fiters. How is any soid hazardous waste removed and disposed of? Soid waste is coected in the interceptor and woud be emptied occasionay with a vacuum tanker. Does the system remove dissoved heavy metas? No. Organic materia and detergents wi be removed by the activated carbon fiter. Can it run on rainwater? The system wi ose water from overspray and evaporation. This water needs to be repaced and is done via the fina mains water rinse faciity on the recaim. This coud be substituted with rain water. Have water quaity tests been conducted on the fitered water? No tests have been carried out as this has never been requested. How often do fiters have to be repaced? This is dependent on the usage and how much detergent is used if any. It is recommended however that the carbon fiters are changed every 3-6 months. The cartridge fiters shoud be repaced monthy.

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20 The Green Bue The Green Bue is a UK wide programme created by the British Marine Federation and the Roya Yachting Association in 2005 to enabe the UK recreationa boating sector to decrease its impact on the environment by: Raising awareness amongst industry and users Reducing harmfu discharges Reducing environmenta disturbance Encouraging sustainabe choices A joint BMF and RYA Initiative For more information visit our website The Green Bue A joint BMF & RYA Initiative RYA House, Ensign Way Hambe, Southampton SO31 4YA Te: Fax: info@thegreenbue.org.uk Copyright The Green Bue 2013 supported by