Excavation and on-site treatment
Relocation with herbicide treatment
On sites where additional space is available, excavated waste can be stockpiled in a segregated area where its presence will not pose any threat to surrounding structures or be at risk of spreading. A suitable management plan can then be put in place to treat the Japanese Knotweed with herbicide over a period of 2-5 years. This approach will allow the client to immediately proceed with work in the previously affected area and reduces overall costs with no off-site disposal of controlled waste.
For the process to be effective, stockpiled material needs to be stored on top of a geo-textile root barrier membrane in order to protect the ground beneath from contamination. It should be piled no higher than 0.5 meters with the rhizomes as close to the top surface as possible so that they may actively grow. New growth will be treated with potent herbicides until the rhizomes are exhausted and the plant is eliminated.
We recommend you discuss your individual requirements with our experienced surveyors at the earliest stage so that they can determine if your site is suitable for knotweed relocation and assist with logistical decision making.
Excavating large quantities of soil contaminated with Japanese Knotweed for off-site disposal can be very expensive. The less soil sent to registered landfill sites the lower the remedial costs will be. We offer an on-site sifting and screening service whereby excavated soil is passed through a selection of different sized screens and conveyors to separate the invasive rhizomes from the soil. At the end stage, trained knotweed operatives carry out a final check and handpick any remaining fragments of root from the soil. Once the rhizomes have been separated, they are placed into bags and incinerated off-site. Although the screening process is effective there will still be some soil which has to be disposed of as controlled waste, however the quantity will be significantly lower and the remaining soil can be repurposed on site. As with all excavation methods our after-care service includes 2 years of monitoring to ensure any missed rhizomes are quickly identified and treated.
Cell burial is the process whereby Japanese Knotweed and contaminated soil are excavated from one location and buried in an excavated pit lined with a root barrier membrane in another location within the site. This option is useful for sites which do not have the time available for herbicide treatment or the budget for off-site disposal to registered landfills. Once the knotweed burial is complete work can resume immediately on site, this is generally within a matter of weeks. The depth of the burial pit needs to be at least 5m deep with the top of the burial cell a minimum of 2m below the surface. The controlled waste is encapsulated by heat welding the seams of a geo-textile membrane from which the Japanese Knotweed cannot escape. Clean soil is then placed on top of the cell to secure its containment. Consideration must be given to the future use of the area where the cell burial is to be contained so that it is not at risk of being disturbed from further development and its location should be recorded on all site plans. The Environmental Agency must be notified of plans to bury Japanese Knotweed and give approval before works commence. JBB Knotweed Solutions will manage the entire process ensuring legislation is complied with and on completion provide 2 years monitoring to check no regrowth occurs.
“I’d like to recommend Ian for his services on invasive weeds. As a Chartered Surveyor having an expert to turn to for advice and information is crucial. Ian spent time with me and 2 graduates on site to discuss the remediation of knotweed. His knowledge is second to none and the depth of information he provided in his area of expertise is impressive. I would 100% recommend Ian.”
“These works have created an attractive and tidier looking space which now enhances the 4 star experience of our guests from their arrival and throughout the duration of their stay. It has benefited not only our hotel guests but also our leisure facility members who routinely comment on the improvements that were carried out on the grounds leading to the entrance.
We are grateful to JBB GroundCare Ltd for listening to our needs and delivering on a high standard of finish. The works were carried out on budget and time.”
“JBB GroundCare Ltd assisted us in the design and ideas for our recent garden and decking makeover, the service we received was second to none and the efficiency and cleanliness of all the team was superb. Both areas are looking fantastic and lots of our customers have commented on how great the grounds are looking. I can highly recommend JBB GroundCare Ltd.”
“JBB GroundCare Ltd have proved to be a reliable and trustworthy contractor. They continually deliver a high standard of service and their client relation skills are excellent with prompt responses to communication. Their initial visit to our Dumbarton site achieved great results and I know I can rely on them to deliver standards that will positively enhance our sites.”
“We wanted to improve the appearance of the car park at our Falkirk showroom which was a bit of a jungle and we were unsure what best to do. JBB GroundCare Ltd reacted quickly, first with their quotation and once accepted we had everything in place within 4 weeks. Hassle free and our trust in them designing and implementing the project unsupervised proved well placed.
We now have a professional and tastefully landscaped car park with vibrant and hardy shrubs and plants. JBB GroundCare Ltd continue to provide a monthly maintenance service.”
“JBB GroundCare Ltd has been servicing our premises for over several years and since their first visit the grounds have always been kept in immaculate condition. The staff are very friendly and professional at all times. I have peace of mind that whether it is summer or winter the grounds will be safe and well maintained for my staff and clients.”
“Every project they have completed for us has been carried out to the highest standard with their attitude, commitment and willingness to go the extra mile setting them apart from their competitors and making them a pleasure to work with. I would have no hesitation in recommending JBB GroundCare Ltd and will continue to make the most of their professional services.”