INTERVENTION: INTERVENTION OF REMEDIATION OF THE EX ALUMIX AREA IN THE TOWN OF PORTOSCUSO (CI) LOC. PORTOVESME. CUSTOMER: Ligestra s.r.l. FINANZIAMENTI : Ligestra s.r.l. LOCATION: The site of about 8 hectares is located in the southern part of Sardinia, within the industrial area of Portovesme along the SP 2 in an area bordered to the north by the properties of Portovesme srl, to the south by ALCOA and to the west by ENEL properties UBT Sulcis TENDER AWARD: R.T.I.: Ambienthesis S.p.A. already Sadi Servizi Industriali S.p.A. (Mandataria) – Ireos S.p.A. (Mandante) AMOUNT OF RESPONSABILIT Y: Total contractual amount accrued up to December 2018: € 52,345,938.99 + VAT Amount of responsability: 51% PERIODO DI LAVORO: February 2009 – in corso PROBLEM: Inside the area there is a non-waterproofed industrial landfill where the residues from the demolition of the electrolytic cells for aluminum production have been deposited (concretes, refractories, anodes and carbon cathodes, iron, fluorite-based salts, slag of aluminum) and other industrial production / maintenance residues that
Transcript
INTERVENTION: INTERVENTION OF REMEDIATION OF THE EX ALUMIX AREA IN THE TOWN OF PORTOSCUSO (CI) LOC. PORTOVESME.
CUSTOMER: Ligestra s.r.l.
FINANZIAMENTI: Ligestra s.r.l.
LOCATION:The site of about 8 hectares is located in the southern part of Sardinia, within the industrial area of Portovesme along the SP 2 in an area bordered to the north by the properties of Portovesme srl, to the south by ALCOA and to the west by ENEL properties UBT Sulcis
Total contractual amount accrued up to December 2018: € 52,345,938.99 + VAT
Amount of responsability: 51%
PERIODO DI LAVORO: February 2009 – in corso
PROBLEM: Inside the area there is a non-waterproofed industrial landfill where the residues from the demolition of the electrolytic cells for aluminum production have been deposited (concretes, refractories, anodes and carbon cathodes, iron, fluorite-based salts, slag of aluminum) and other industrial production / maintenance residues that generally involve the presence of contaminants such as PAHs, hydrocarbons, fluorides and heavy metals. In addition to these residues there are other inorganic wastes (mainly carbon residues) and urban-like waste (rags, plastics, tires, etc.). The volume of the landfill to be reclaimed is estimated at around 298,000 m3.
INTERVENTION: Electric Station IV Edison of Porto Marghera (VE)Final design of soil remediation with safety measures
Edison Centrale di Marghera Levante – Via della Chimica, 16 – 30175 Porto Marghera (VE) (sede operativa)
LOCATION: The object of the intervention is the land remediation and safety works of lots 1 (parcel A and B) and 2 of the IV Edison power station in Porto Marghera (VE)
AMOUNT OF RESPONSABILITY: Contractual amount to the total amount presumed in: Euro 430.455,00 +
VAT
WORKING PERIOD:
PROBLEM:
august 2015 – december 2016
The area develops in the chemical center of Marghera, site of National Interest.
The purpose of the interventions is the remediation of the soils with securing through various interventions according to the areas and the contamination found.
The activities are developed in the production site, under the direct control of the Client.
ENTITY AND TYPE OF INTERVENTION:
Lot 1 – Areas with presence of PCDD/F into top soil
The intervention is developed into the following phases:
Preoaratory phase: delimitation of the area of intervention of the particle
Sampling of surface soil samples Laboratory analysis Definition of the extension of the intervention area
Phase 1: preparation of construction site areas Setting up of access areas to construction vehicles Closure of construction site areas through enclosure and
appropriate vertical signage• Implementation of temporary storage
Fase 2: removal of contaminated soils Removal of contaminated soils and storage in the temporary
deposit or in the demountable container Characterization of the waste Land loading on vehicles authorized to transport such waste,
transport and transfer to an authorized disposal facility;
• Wall and bottom excavation checks
Phase 3: Final restoration of the intervention areas Filling of the excavations with suitable soil of certified origin Removal of fences on the access lanes and temporary storage Final restoration of the area
Lot 2
Phase 1: preparation of construction site areas Setting up of access areas to construction vehicles Closure of construction site areas through enclosure and
appropriate vertical signage
Phase 2: removal of contaminated soils Removal of contaminated soils and temporary storage in suitable
roll-off containers Characterization of the waste Land loading on vehicles authorized to transport such waste,
transport and transfer to an authorized disposal facility
Phase 3: Final restoration of the intervention areas Filling of excavations with suitable soil Removal of fences and access lanes Surface asphalting with bituminous conglomerate
SUB-CONTRACTED ACTIVITIES:
- Part of the Scotic Activities
- Realization of waterproofing systems in HDPE of temporary waste deposits
- Waste transport
INTERVENTION: Settlement Syndial SpA – Marghera.
Remediation intervention of the Top Soil, with safety measures - AI, AS, CPL, CTE, IMP, MAT, MT, TDI, PSS and Isola 60 areas, according to the contents of the intervention Project approved by the Ministerial Services Conference.
LOCATION: The object of the intervention is the reclamation and safety works of the Top Soil inside the Petrochemical Plant of Porto Marghera (VE), in the macro-island called New Petrochemical, inside areas owned by Syndial S.p.A.
Contractual amount as a total amount presumed in: Euro 7,319,162.74 + VAT
WORKING PERIOD:
PROBLEM:
august 2012 – 2016
The area develops in the chemical center of Marghera, site of National Interest.
The surface condition of the settlement soils was affected, in the course of previous industrial production, by organic and non-organic contamination.
The purpose of the interventions is the removal of the first centimeters of contaminated soil, followed by restoration with imported soil and proceeding with permanent safety (asphalting and / or waterproofing).
Activities are developed in the production site, under the direct control of the Client.
ENTITY AND TYPE OF INTERVENTION:
The intervention involves the removal of the first 20 cm of land, in predefined areas according to the project, according to punctually identified excavation polygons, with consequent verification of the excavation background and carryover of new land for filling.
Object of intervention are about 20,000 cubic meters of soil and 30,000 cubic meters of concrete and / or asphalt pavement, divided into different areas identified in specific georeferenced polygons within the plant.
The excavation is carried out by means of an overturned bucket crawler excavator, with a georeferencing system in real time. The matrices removed are from time to time accumulated in a protected area and subjected to classification prior to disposal. Some types, contaminated with asbestos, are bagged before the off site conferment.
Packaging is carried out by Ambienthesis trained and protected personnel with specific protection equipment.
La messa in sicurezza con HDPE La messa in sicurezza con asfaltatura
Activities include the following actions: Work site set-up; construction / preparation of the preliminary deposit; excavations of scotico; restoration with agricultural land and / or waterproofing with
laying of "closed" type asphalt concrete; rebuilding of layers of wear on existing road surfaces; topographic measurement; supply and installation of building materials of various kinds; Finishing and securing of reservoirs and/or pre-existing articles; operational (transport and disposal) and administrative
management of waste resulting from remediation activities;
The following types of waste are excavated, packaged, transported and disposed off site during construction:
- 170504 – excavated earths and rocks;- 170503* - excavated earth and rocks containing dangerous
INTERVENTION: Interventions for the safety of the underground groundwater former Flucosit
CUSTOMER: Municipality of Asola (MN)
FINANCING: Regione Lombardia:
LOCATION: On the former Flucosit site, various production activities alternated, such as: production of bitumen, chemical industry for the production of benzene, toluene, xylene and butyl alcohol and production and mixing of liquid fertilizers.
AMOUNT OF RESPONSABILITY: Contratto base + atti aggiuntivi: Euro 4.919.587,07 oltre IVA
WORKING PERIOD: 2013 – 2018
PROBLEM: The site was a former settlement of synthesis products of organic chemistry.Over the decades, following the detected contamination due to previous activities, third-party companies have carried out various remediation interventions on the matrices involved.
In 2004 a further and in-depth campaign was conducted to investigate the characterization of soils (probing and trenches, also in the external areas surrounding the area under study) and groundwater (piezometers).Upon award of a public invitation to tender, from 2007 Ambienthesis carries out the safety of the groundwater on site, by directly emitting and treating it on site, by means of a specially designed and equipped modular mobile plant.
Following the final design of the site remediation (commissioned by the Contracting Authority as a qualified designer and approved by the Services Conference) and subsequent public tender experiment, Ambienthesis was also awarded the land remediation interventions, aimed at the final solution of the problems of the place.
The objective is to remove approximately 100,000 cubic meters of land heavily contaminated by volatile hydrocarbons and nitrogenous organic substances (notably BTEX and ammonia), while maintaining the hydraulic barrier for the entire duration of the works.
ADOPTED TECHNOLOGY:
The first intervention lot, of which Ambienthesis is the winner, consisted in the execution of the activities necessary for the maintenance in operation of the hydraulic barrier (5 wells) complete with water pumping and collecting systems, as well as in the freight and management of the water. treatment plant, for a period of at least 2 years to be extended until the reclamation of the area has been carried out.benzene, toluene and xylenes, in addition to ammoniacal nitrogen are the contaminants present in groundwater to be removed, due to previous activities. The contamination values detected of these substances are rather high (thousands of ppm) if compared with the legal limits allowed for groundwater.
Demolition works were carried out on the buildings and residues of the plants on site, after reclamation of the artifacts containing asbestos (in a compact and crumbly matrix) and mineral wool.
Demolizioni degli edifici Confezionamento MCA
at the same time, Ambienthesis provided for the removal of over 30,000 cubic meters of land and underground waste contaminated with BTEX and nitrogenous substances. The excavation, performed in a statically and dynamically confined space, took place following the characterization of the waste.
Le fasi di scavo sotto tensostruttura confinata staticamente e dinamicamente
The installed tensile structures were prefabricated modular type, they had a surface of 60x30 m each, made with provisional aluminum purlins and fireproof polyethylene sheets.The internal volume of the same allowed the necessary operation of the vehicles also in terms of height.In order to partition some sections of the excavation, Larsen-type metal piles have been previously installed, then paraded at the end of the works.
During the working period, the facilities for draining the water that emerged from the excavation were also installed and managed.
Le palancole installate prima dello scavo
L’interno della tensostruttura con lo scavo e le acque affioranti
The vehicles used during the interventions have been equipped with emission abatement systems (water boilers) and cabins insulation systems (pressurization systems with combined filters).The confined space has been subjected to constant monitoring of the working conditions (indoor) and of the emissions (exhausts of the extraction system), as well as the environmental conditions were monitored weekly at the perimeter of the work areas.
Piazzamento radielli per il monitoraggio passivo delle aree al perimetro
The contaminated matrices were temporarily placed in a sheltered position within the site, awaiting the excavation checks and the subsequent filling of the excavated volume with clean material supplied from the quarry. Following this, Ambienthesis created a volume confined to armed lands, with construction criteria identical to those of the landfills for non-hazardous areas, within which the contaminating waste was stored.
Le terre armate in corso di realizzazione
Ambienthesis has provided for the supply and installation of the inert layers (clays, drains, ground cover), supplies and installation of geosynthetics (HDPE, Bentonite, TNT) and useful and necessary preparations for the management of leachate and of rainwater.
ENVIRONMENTAL RESULTS:
The intervention of Ambienthesis has finally allowed the solution of an environmental problem that has been dragging on for decades.
The operation as well as conducted allowed the best protection of the workers, potentially exposed third parties and the environmental matrices directly involved and surrounding.
SUBCONTRACTED ACTIVITIES:
Part of the earthworks and the construction of the new reservoir built in armed lands.
INTERVENTION: emediation and demolition of the 92,000 cubic meter S3 reservoir containing OCD and sludge
CUSTOMER: ILVA S.p.A. (ora ArcelorMittal Italia SpA)
LOCATION:The object of the intervention is the reclamation and demolition of the S3 tank containing OCD and sludge. The tank is located within the Taranto iron and steel plant. In disuse for years, it was used as a container of muds that were improperly accumulated on its floating roof, causing it to collapse.
CONTRACTOR: AMBIENTHESIS S.p.A.
AMOUNT OF RESPONSABILITY: Total contract amount:
€ 4,102,698.08 € + VAT
WORKING PERIOD:
PROBLEM:
march 2017 – december 2018
The area develops in the steel plant of Taranto, site of National Interest.
The purpose of the interventions is the removal of the sludge and residues of Denso Fuel Oil (OCD) accumulated over the years inside the tank called S3, with a maximum useful capacity of 92,000 cubic meters.
The activities take place at the production site, under the direct control of the Client, as well as the DL and the CSE.
ENTITY AND TYPE OF INTERVENTION:
The intervention involves the extraction of the garbage in the tank (75 m in diameter). Before the intervention, all the necessary safety and stability assessments were carried out since the structure of the tank is compromised by the improper use of the same (the sludge has been dumped on the floating roof of the same which, with time and due to the overload has sold, collapsing inside the container).
I serbatoio prima dell’intervento Le fasi di allestimento
Il taglio del mantello La bonifica degli OCD
L’avanzamento dei lavori L’allontanamento dei rifiuti
The activities performed briefly include the following actions: construction site set-up; waste mapping; preliminary cleaning and securing of dangerous bodies; removal of over-roof waste; roof removal; garbage disposal removal; mantle and bottom remediation; tank removal;
The following waste was extracted and disposed:- about 19,000 tons of non-hazardous sludge- about 4,000 tons of non-hazardous waters- about 100 tons of hazardous waste (insulation, oil, foundry)
SUBCONTRACTED ACTIVITIES: - part of the demolition activities
- part of the remediation activity
INTERVENTION: Site reclamation of former Falck steelworks in Sesto San Giovanni (MI).Site of national interest, I Stralcio reclamation
CUSTOMER: Milanosesto S.p.A.
FINANCING: Milanosesto S.p.A.
LOCATION: The abandoned settlement in the 1990s occupies almost a third of the territory of the Municipality of Sesto San Giovanni.
The areas concerning Milanosesto constitute more than 80% of the former industrial site, for a total of about 1,600,000 square meters.
The area does not consist of a single plot but of more "Compartments" delimited by urban type roads and by sectors of residential and craft-commercial districts.
The sub-funds, of various area and industrial sizes (depending on the activity of the former operating chain) are identified by the denominations:
- sector CONCORDIA- sector UNIONE - sector TRAI- sector VITTORIA A- sector VITTORIA B- sector TRIANGOLO
In the past (2005-2009) each of the sectors has already been object of asbestos remediation and demolition of civil and industrial buildings therein. These interventions were already carried out by the operating structure of Ambienthesis S.p.A.
PROBLEM: Soils must be reclaimed and the underground structures of the Union of the former Falck sector in Sesto San Giovanni must be demolished.
The interventions, carried out according to the reclamation project approved by Ministerial Decree, concern the “Città della Salute” section: they must be completed in time for the construction of the large healthcare facility developed on behalf of the Lombardy Region by the arch. Renzo Piano.
The activities take place in an urban context, providing for work in confined spaces, constantly supervised in real time by the client and the relevant bodies.
The object of intervention are over 360,000 cubic meters of contaminated land and about 150,000 cubic meters of heavily armed demolitions.
The activities include the implementation and operation, for the entire duration of the works, of a specially constructed hydraulic barrier, divided into five wells, each connected to the treatment system implemented on site.
All processing matrices (land, rubble, water) are subjected to on-site treatment, carried out by means of mobile plants authorised.
Criticalities of the interventions are attributable to the amount of materials to be removed and treated in the time, short, granted.
The construction site required for the installation of the soil washing plant, authorized for the treatment of 100 tons / hour, as well as the screens, the
crushers and the barrier water treatment plant is impressive.
The activities are carried out on extended shifts, seven days a week, without interruption, until the end of the remediation.
Most of the materials treated must be recovered and returned to the customer for re-use on site. Other non-recoverable quantities are destined for off-site disposal, for a total of over 200,000 tons. To this end, Ambienthesis has structured a list of authorized plants to receive the waste to be allocated very off site, both in terms of quantity and type, which includes over 25 authorized parties.
ENTITY OF THE INTERVENTION:
The remediation develops according to the criteria of the Approved Project, enriched by the numerous and intricate prescriptive measures elaborated by the numerous institutions involved (over 10 subjects).
Work activities are organized according to the following time schedule, well defined and contracted by precise milestones:
- document production (qualification of suppliers under the legality protocol);
- detailed and detailed executive planning, with the drafting of all the administrative procedures necessary for the financial year (DIA, practices for the discharge of water, noise waivers, instant for the operation of mobile plants ...);
- clearing and securing of the delivered areas;
- collection and disposal of various and bulky waste;
- demolition of railway connections and disposal of sleepers;
- preliminary investigations for debombing and possible recovery of underground asbestos products;
- securing and delimiting buildings of historical interest, to be preserved during construction;
- preparation of construction sites, with the installation of over 150,000 square meters of perimeter and waterproofed areas suitable for receiving the mobile washing and selection plants, with relative covered storage bays and characterization of the land and rubble;
- realization of the hydraulic barrier through the terebration of 5 barrier wells, diameter 500 mm, depth 40 m, with pumping of about 50 mc / h each;
La fase di terebrazione di un pozzo La messa in opera di una cameretta
- activation of a modular mobile system for the treatment of emitted barrier waters, with treatment efficiency monitoring;
Fasi di cantierizzazione e montaggio impianto mobile trattamento acque
- assembly and commissioning of soil washing, through authorized modular mobile plant, capable of treating up to 100 tons / h of land, for an overall army treatment of over 70,000 tons of land;
L’area prima degli interventi Parte dell’impianto di lavaggio montato
La filtropressa asservita al soil washing La sezione di trattamento acque
- selective excavation of contaminated soils, for overall volumes greater than 360,000 cubic meters, with excavation depths over 15 m from ground level, providing for all the aids and support works on the perimeter, designed to ensure the stability of the slopes and near buildings.
- on-site screening of about 80,000 cubic meters of contaminated land, through authorized mobile screen, with vibrating floors, with a 20 mm cut;
Vagliatura con impianto mobile Frantumazione con impianto mobile
- on-site crushing of about 80,000 cubic meters of demolition debris, using mobile jaw crushers.
All the above activities are conducted under constant supervision and environmental monitoring.
In particular, Ambienthesis deals not only with the general coordination of the contract, but also with the management of on-site treatments, operating through own authorized facilities pursuant to art. 208 of Legislative Decree 152/06.Each activity is carried out in full compliance with the current regulation, guaranteeing full traceability of the flows, through the keeping of registers and legal documents (loading and unloading registers, waste identification forms, Sistri forms) and documents required by contract (register of internal flows).
Through its own staff, operating over several shifts, Ambienthesis SpA manages and controls the operation of the plants, guaranteeing the success of the interventions.
Each batch of excavated and treated material is analytically verified in lots of 1,000 cubic meters, the documentation of the origin, the treatment cycle applied and the final destiny reserved (on or off site) is guaranteed for each lot.
Specialized technicians work at the Ambienthesis headquarters, at the complete service of the contract, also through the performance of laboratory tests and functional simulations for the optimization of the treatments and the best pursuit of the objectives.
Prove e verifiche di laboratorio, svolte da tecnici Ambienthesis
Former Sieroterapico Institute Area - Milan:The area affected by the intervention, called the "ex Sieroterapico Milanese Institute", is part of an urban area between Via Segantini, Viale Liguria, Viale Romolo, Via Argelati and Piazza Arcole
and extends for about 114,800 m2. REMEDIATION AND DEMOLITION
52,000 m3 the volume of sequential demolition of all buildings, warehouses, warehouses and sheds in the area;
removal of artifacts containing asbestos and / or mineral wools; 106,500 m3 of land contaminated mainly by heavy metals (Pb, Zn, Hg, Cu and As) and
chlorinated pesticides (DDT and Dieldrin) affected by reclamation and safety measures; manual removal of materials containing asbestos and their packaging; 50,000 m3 of material reclaimed in situ.
oTECHNOLOGY
demolition of buildings by means of an excavator equipped with a hydraulic clamp, subsequent crushing into movable blocks for loading and transport to external recovery plants;
selective excavation operations with excavators equipped with a bucket, to remove contaminated waste / land; lifting, loading, transporting and unloading to the screening plant in the waterproofed pitch;
dry mechanical sieving treatment for a total of 106,500 m3 with a plant for the separation in piles of 3 fractions;
formation of differentiated heaps on waterproofed slabs and subsequent characterization of the land;
sending to recovery and / or disposal of land not complying with the risk analysis to landfills and external recovery plants;
loading, transporting and unloading at re-use sites with spreading and modeling as per the design of the land complying with the remediation objectives;
re-placing in situ, subject to verification of suitability, of 50,000 m3 of material.
Remediation from asbestos and mineral woolsEx Sisas Area - Pioltello (MI):The site of about three hectares is located in the eastern suburbs of Milan, within the Site of National Interest of Pioltello and Rodano. The intervention involved the selective demolition of all the structures in the former Sisas area (chemical plant). REMEDIATION AND DEMOLITION
over 97,000 tonnes of waste handled, of which 38,000 tonnes classified as hazardous; monitoring of environmental matrices and continuous operation of the hydraulic barrier; plant remediation and decommissioning with subsequent complete demolition, up to the ground
floor, of all the dense and complex plant engineering of the old plant; 3,000 t of industrial waste produced by plant reclamation (wastewater, sludge, catalysts, filters); 20,000 tons of metals sent for recovery off site at authorized facilities; 10,000 t of rubble sent for final disposal off site.
ASBESTOS REMEDIATION
removal of amiantifera matrix and mineral wool products; removal of over 60,000 m2 of mineral wool insulation on pipes, tanks and chimneys; reclamation of over 4,000 m of asbestos pipes; removal of over 20,000 m2 of asbestos cement roofing; removal of over 1,500 m3 of diatomite, stuffed into big bags.
TECHNOLOGY
use of aerial platforms up to 35 m outreach; realization of multidirectional scaffolding; static and dynamic confinements (height over 30 m); disassembly, cold cutting and shearing techniques with hydraulic clamps mounted on
excavators with an extended arm; protection of the water table through a barrier capable of 1,000 m3 / h divided into 4 macro-
hubs; installation and on-site operation of systems authorized for the processing of streaming and
groundwater / rainwater collected during processing; laboratory and field tests functional to the stabilization and conditioning of the most problematic
matrices; characterization, classification, treatment, recovery and / or disposal of all waste produced at
authorized final plants.
INTERVENTION: INTERVENTIONS FOR THE REMOVAL OF CONTAMINATED WASTE / LAND IN THE CRATER AREA IN THE SYNDIAL DI MANTOVA SITE (MN).
CUSTOMER: Syndial S.p.a.
FINANCING: Syndial S.p.a.
LOCATION:The intervention is part of the wider reclamation intervention of the area called "Collina" denounced in 1980 by Montedison as an exhausted dump (L.R. 94/80) and currently owned by Syndial.
The “Collina” area is located within the Mantua petrochemical center, at the south-eastern end of the Versalis owned factory, between the Diversive Canal to the east, the Darsena to the south, the Sisma Canal to the west and the Tanks Park North. The area pertaining to the yard has an extension of approximately 5 hectares of which approximately 1 hectare, in a sub-area called Cratere (Area R1C), is the subject of the reclamation in question, affecting a total volume of contaminated waste / land to be removed, estimated at around 100,000 cubic meters.
AMOUNT OF RESPONSABILITY: Total contractual amount: approximately € 20,000,000.00 + VAT
Of which approximately 7,100,000.00 + VAT jurisdiction Ambienthesis S.p.A.Amount accrued in January 2019: approximately € 900,000.00 + VAT
WORKING PERIOD: march 2017 – current
PROBLEM: The Crater area - R1C is, in fact, the nucleus of the plant landfill, it operates uncontrollably until the 1980s.The content is made up of different and heterogeneous matrices, which are fooled in a non-systematic way. From the exploratory surveys available there are contaminants specific sites substantially of hydrocarbon nature, sometimes found in combination with metals (eg mercury). In detail, the die matrices are constituted by the queues and by the processing scraps of the plant (styrene).
Perimeter the reclamation intervention is delimited by an existing combiwall that develops continuously along the 4 sides going to the underlying waterproof substrate. The excavation for the removal of waste and contaminated land will reach the roof of the natural clayey / peat silt, which varies variably in the Crater between -8 and -10 m compared to the ground level. Considering the aforementioned theoretical depth and the extension of the R1C area, it is estimated a volume of waste and contaminated land to be removed equal to about 100,000 cubic meters.The intervention objective is the removal of waste and contaminated land beyond the CSRs that are located within the depths and areas identified.
ENTITY OF THE INTERVENTION:
The activity consists in removing about 100,000 cubic meters of waste and contaminated land in a confined space. This volume is enclosed within a perimeter combiwall of over 400 linear meters. The project involves the construction of internal partitions, always made using piles and sheet piles, in 15x15 m operating cells, each of which involves the removal of approximately 2,200 cubic meters of off-site materials. The peculiarity of the site and the material to be reclaimed is that it does not have sufficient bearing capacity for the transit and parking on its surface of the necessary means of work. For this reason, the intervention involves the execution "in advance" according to the diagram shown below where the red cells are those in excavation, the gray cells are those being tested, the yellow cells those are filling and, finally, the green cells those reclaimed and completed:
Waste consists of volatile and dangerous substances (VOC) therefore, in compliance with the design requirements, the intervention is planned in a confined space inside special mobile marquees (which will be moved with a suitable crane) that will guarantee the control and the treatment of atmospheric emissions generated during all phases of the intervention: excavation, testing and filling.
The management of emissions is guaranteed by an air treatment plant equipped with filters to reduce dust, VOCs and mercury. The system is sized for the treatment of about 36,000 cubic meters / hour and guarantees 4 air changes / hour in the operating structure and 1 air change / hour in the testing and filling ones.
In order to keep the groundwater level in the excavation cells sufficiently depressed, a dewatering network consisting of 8 deep wells is also planned. The water removed is sent to an existing water treatment plant within the Syndial plant which is directly responsible for its management.
ADOPTED TECHNOLOGY:
Approntamento prima cella operativa Impianto di trattamento delle emissioni
Struttura operativa. Struttura operativa, scavo rifiuti.
The entire remediation involves the adoption of specific techniques and technologies of Ambienthesis know-how in each operational phase:
- excavation in potential presence of unexpected toxic substances and in conditions of low static geomechanics of the waste subject to removal and therefore use of environmental monitoring systems, adoption of selective excavation techniques, adoption of dust suppression systems and mitigation of the environment effects;
- excavation in an environment confined by radio-controlled means from the outside of the operating tensile structures in order to avoid / minimize the permanence of the operators inside, with a consequent noticeable improvement in the operating safety conditions;
- air treatment by means of a modern and efficient treatment plant capable of treating up to 36,000 mc / h of and guaranteeing 4 air changes / hour in the operating structure;
- 417/5000- plug & play type carbon filter replacement system, the entire filter is
replaced without the need for decanting / filling of the filters themselves with considerable simplification of activities, reduction of operational risks and exposure to pollutants for operators and cancellation of any dust emissions intrinsic to the movement of activated carbon;
- continuous atmosphere monitoring systems during excavation activities in order to prevent any problems relating to the explosiveness of waste and the exposure of operators;
- no storage of waste / land outside tensile structures and confined spaces;
- direct loading of the authorized personnel for the off-site transport of the waste produced inside the tensile structures;
- translating weighing system for verifying the load of waste and the introduction / extraction of semi-trailers intended for off-site transport of waste without the need for third parties (in this case the drivers of loading vehicles) to enter confined spaces. This task, however limited by the use of remote-controlled vehicles, remains reserved for highly specialized Ambienthesis operators.
The realizations are carried out in the scrupulous respect of the constructive details that the technical staff of the same company Ambienthesis has elaborated on behalf of the Client and has submitted to the approval of the Bodies.
ENVIRONMENTAL RESULTS:
The environmental result of the project is made up of several aspects, among which the most relevant are:- Containment and control of atmospheric emissions due to the
presence of waste and volatile substances during all phases of the work, from excavation to post-inspection re-filling;
- Containment and control of deep and superficial water with sending to treatment / disposal of the same;
- Reduction / elimination of additional drainage water following the occurrence of rainfall events once the operating tensile structure on each excavation cell has been put in place and operational (total roof coverage and perimeter termination by combiwall);
- Removal and removal due to dispatch to off-site disposal of approximately 100,000 cubic meters of waste and contaminated land.
Finally, Ambienthesis put itself at the service of the end customer with all its staff, in order to achieve the best result in terms of reliability and sustainability, economic and environment.
Although the project, lasting over 5 years, presents great uncertainty due to the possible heterogeneity of the waste to be removed and the current lack of a thorough knowledge of the same (which will be acquired along the way with the progress of the work), Ambienthesis represents itself as a dynamic reality able to deal with every possible unexpected, with the intent to guarantee the achievement of results in the expected timing. The broad qualification and technical-professional reliability of the company would allow, for example, to face new problems that may occur during work such as those related to materials containing asbestos or other unforeseen waste.
WASTE CODIFICATION:
The presumed encodings of the outgoing waste destined to off-site disposal (managed directly by the Customer) are:
- CER 17.05.04 - land and rocks other than those referred to in item 170503 * landfill destination on site
- CER 19.13.02 - solid waste from land reclamation operations, other than those referred to in item 191301 * - waste resulting from inertisation operations - destination of authorized off site plant
- CER 19.13.01 * - solid waste from land reclamation operations, containing dangerous substances - waste deriving from selection operations - landfill destination off site
- CER 16.10.01 * / 16.10.02 - aqueous waste solutions containing / not containing dangerous substances - destination of plant treatment of establishment and / or off-site disposal to authorized plant
- Other possible CERs for smaller quantities to be determined during the work.
