DREDGING IN THE EUROPEAN UNION: REGULATIONS, PROBLEMS AND BEST PRACTICE

Transcription

1 DREDGING IN THE EUROPEAN UNION: REGULATIONS, PROBLEMS AND BEST PRACTICE October 212 PIOMBINO SEDIMENT IN THE PORT OF PIOMBINO: FIRST HAND EXPERIENCE AND POSSIBLE NEW APPLICATIONS Dott. Ing. Sandra Muccetti Dott.ssa Roberta Macii

2 Territorial position

3 Piombino has been included in the sites of national interest (SIN) under article 1, clause 4 of the law 426/98, and the boundaries of the area were defined in the Ministerial Decree of 1 January 2, with later modifications to enlarge these in the Ministerial Decree of 7 AprilA 26, as published in the Gazzetta Ufficiale n 147 of the 26 June 26 The SIN of Piombino is made up of: A land area of 93 ha A sea area of 2,15 ha Boundaries of the Piombino SIN

4 INDUSTRIAL ACTIVITIES WITHIN THE PIOMBINO SIN

5 CHARACTERISATION OF THE MARINE AREAS The Chiusa area The large basin The small basin The port area and the dock evolution The area next to the Marinai d Italia wharf

6 MARINE INTERVENTION LEVELS FOR THE PIOMBINO SIN NUMBER SAMPLE STATION PARAMETER PP INTERVENTION VALUES Metals mg/kg s.s. Arsenic 42 Cadmium 1 Chrome PP Mercury P Nickel P Lead 95 Copper Zinc Organo-metals Organo-stannic compounds Aromatic polycyclicals 95 2 pg/kg s.s. 7 (Sn) pg/kg s.s. PP Total IPA PP Benzo(a)pyrene P Anthracene P Fluoranthene P Naphthalene 39 Pesticides pg/kg s.s Aldrin 4, , PP Alpha hexachlorocycloesane PP Beta hexachlorocycloesane PP Gamma lindan hexachlorocycloesane 1 DDT DDD 5 DDE 5 Dieldrin 5 Dioxins pg/kg Sommat. PCDD, PCDF and PCB dioxins and similar PCB total PCB 3 x 1-³ pg/kg 19 Chemical values for intervention, it should be remembered, means the concentration in the sediments of the chemical substances listed in the following Table which, if exceeded, may set in motion an intervention procedure. This is evaluated on a case-to-case basis, considering the quality and quantity of the sediments that are not in conformity and the legitimate use of the area in question (such intervention values are proposed by ICRAM to the Ministry for the Environment and the Care of Water and the Seas under the protocol n 264/6 of 21 March 26).

7 PRELIMINARY RECLAMATION PROJECT FOR THE SEABED OF THE PORT AREA INCLUDED IN THE PIOMBINO SIN (ISPRA 28)

8 GIVEN THE RESULTS OF THE RECLAMATION PROJECT, IT WILL BE NECESSARY TO REMOVE/DREDGE THE FOLLOWING QUANTITIES OF MATERIAL Intervention values ICRAM <Conc< Col. B Table 1 attachment 5 title V part IV legislative decree 152/6 [m³] Table 1 attachment 5 title V part IV legislative decree 152/6 < Conc < attachment D part IV legislative decree 152/6 [m³] < Conc < attachment D part IV legislative decree 152/6 [m³] -5 cm 18,284 25,668 5, cm 78, ,811 1, cm 86,865 13,16 1, cm 14,849 84, cm 55,415 18, cm 48,866 16,95-392,574 61,519 9,144 LAYER TOTAL down to 3 metres 1,3,237

9 The definitive reclamation project for the seabed in front of the Marinai d Italia wharf, approved by the Ministry of the Environment and Territorial Protection on 28 September 24. The reclamation intervention has been carried out by way of the mechanical removal of the contaminated sediments and their succeeding removal to an infill basin. In detail, the reclamation operations involved the removal of a total quantity of 93, m³ of marine sediments.

10 Photograph of the small basin

11 ENVIRONMENTAL MONITORING DURING RECLAMATION/DREDGING ACTIVITIES The priority objective of the monitoring plan to evaluate the effects of activities connected with dredging in the water space in front of the Marinai d Italia wharf in the port of Piombino was to environmentally safeguard the areas involved in activities of dredging, transport and storage in infill basins of the sediments arising from the reclamation. This was to be brought about through checking certain environmental parameters which could have been influenced by reclamation activities (re-suspension of sediments, turbidity, mobilisation of contaminants) and their interaction with the biota. Monitoring was carried out not only during the activities outlined above, but also during the periods before and after, in order to verify any possible variation in the conditions of the environmental parameters involved, and to verify that the conditions existent prior to beginning dredging were restored at the close of such operations.

12 The monitoring plan: investigative fields The chosen monitoring system to evaluate the effects that activities of excavation, transport and backfilling into the basins might have had on the surrounding marine environment was articulated as: - monitoring the changes in the physical and chemical characteristics of the water column; - determining the bio-accumulation and analysing bio-markers in bivalve molluscs transplanted to the areas under investigation (Mussel Watch); - analysis of outflow waters from the basin; - analysis of waters collected in pietzometers installed around the edge of the basin; - analysis of surface sediments close to the backfill basins.

13 The monitoring programme - sampling sites. In order to carry out the monitoring as mentioned above, on the basis of existing knowledge of the marine area under investigation, a system of fixed sampling sites was set up within the area involved in such a way as to permit the following typologically different areas: - area to be dredged (port), - area of stocking and the stretch of sea in front of the basin (basin), - control area on the external side of the Molo Batteria breakwater (white).

14 The monitoring plan: placement of the sampling sites area da dragare Porto Infill area Basin control area on the outer side of the Molo Batteria breakwater White

15 DEFINITIVE RECLAMATION PROJECT OF THE AREA KNOWN AS CHIUSA WITHIN THE PIOMBINO SIN AND THE FIRST PHASE OF INTERVENTION

16 THE PHASE I OF THE RECLAMATION OF THE CHIUSA INVOLVED 95, m³ OF MARINE SEDIMENTS

17 CONSTRUCTION OF THE FIRST WHARFAGE AND THE DREDGING IN FRONT OF IT (Phase I of the activation of the Port Regulatory Plan for Piombino)

18 TABLES SHOWING THE DREDGING PLAN FOR WHARFAGE PHASE I

19 QUANTITIES OF MARINE SEDIMENTS TO BE DREDGED DURING WORKS RELATED TO WHARFAGE PHASE I Total volumes to be dredged (including tolerances and connections Contamination level Volume (m³) Green (not dangerous) 2.272,2 Yellow (not dangerous) 7.22,71 Red (not dangerous) ,83 Violet (dangerous) ,8 TOTAL 7.524,54

20 SEDIMENT VOLUMES INVOLVED IN DREDGING ACTIVITIES IN THE PORT AREA IN FRONT OF THE WORKS FROM THE SECOND VARIANT OF THE PORT REGULATORY PLAN FOR PIOMBINO

21 A CALCULATION OF THE VOLUME OF SEDIMENT TO BE DREDGED INFILL BASINS OF THE PORT OF PIOMBINO Visualisation of the depth of excavation 3D visualisation of the depth trends in excavation Intervention values conc. elaborated Col. B Table 1 attachment 5 title V part IV legislative decree 152/6 [m³] Col. B table 1 attachment 5 title V part IV legislative decree 152/6 < Conc. elab. < attachment D legislative decree 152/6, part IV titles I & II [m³] Level (cm) Conc. elaborated Intervention values Conc. elab. attachment D legislative decree 152/6, part IV titles I & II [m³] , ,742 3,928 4,158 11,347 8,869 4,356 2,839 3,887 2, ,16 2, ,654 1,612 3,413 33,719 3,391 33,272 3,8 19,171 19,249 15,226 5,486 4,871 6,995 8,836 8,9 8,444 8,174 3,645 3,68 46,164 44,931 44,611 42,4 11,69 11,448 7,14 4,698 2,633 2,6 3,283 1, , Total volume of sediment involved in dredging activities 56,45 244,71 226, ,438 Volumes of sediment to be removed by type and quality

22 INFILL BASINS IN THE PORT OF PIOMBINO

23 Photograph of the large basin

24 THE PORT OF PIOMBINO AERIAL VIEW OF THE PORT CURRENT SITUATION FUTURE LAYOUT OBJECTIVES Development of wharfage, depth, area Railway and SS398 highway arriving into the port Completion of the Tyrrhenian motorway and the Grosseto Fano highway

25 CHARACTERISATIONS UNDERWAY OR TO BE CARRIED OUT

26 New Port Regulatory Plan (PRP) for the port of Piombino, 28: All the solutions to critical points have come together in the new PRP along with proposals for port developments following AN INTEGRATED AND SYNERGISTIC VISION OF PORT INFRASTRUCTURE AND ENVIRONMENTAL RECLAMATION INTERVENTIONS GIVING RISE TO STRONG PROJECT COORDINATION LENGTH OF WHARFAGE PORT AREA (INCLUDING ROAD NETWORK CURRENT SITUATION 2.3 mtl 125. m² VARIANT II TO THE PRP 34 mtl 325. m² NEW PRP mtl 1.9. m²

27 NEW LAYOUT PORT REGULATORY PLAN FOR THE PORT OF PIOMBINO New volume: 7.. m³ Dredging: 3.9. m³

28 MARINE SEDIMENTS DREDGING discretional activity can/must Legitimate right/interest of the collective group An activity of guarantee for public interest in the functionality of the port structure RECLAMATION an activity that is binding both on an and on quomodo A necessary activity qualified in terms of obligation laid down by law and covered by a form of compensatory protection

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30 WHERE THEY ARE - in the Environmental Code article 185 Exclusion from the field of application clause 4: Saving those obligations deriving from specific Community standards, the following are excluded from the field of application of this Fourth Part of the present decree: those sediments moved within surface waters for the management of such waters and watercourses, or for the prevention of flooding, or for a reduction in the effects of flooding or of drought or of soil reinstatement, if it is proven that the sediments are not dangerous as under the decision 2/532/CE of the Commission of the 3 May 2, together with subsequent modifications. - Law n. 84/94 article 5 bis as modified - -National Reclamation Programme - MOBILITY

31 WHAT THEY ARE From a subjective point of view Law n. 84/94, article 5 bis Materials coming from dredging activities within port and marine-coastal areas situated within sites of national interest or for greater precision each single granulometric part obtained by physical means. -

32 Law n 84/94, article 5 clause 11 ter: materials coming from dredging activities, which present physical, chemical and microbiological characteristics analogous to the natural seabed with regard to the site of origin, and suitable with regard to the site of destination, as long as they show no positive results in eco-toxicology testing. sea coastal land beach nourishment Law n 84/94, article 5 bis clause 2, letter a): whenever they present, either at origin or following treatment with the sole scope of removal pollutants, excluding processes aimed at the immobilisation of the same pollutants, physical, chemical and microbiological characteristics to the natural seabed with regard to the site of origin, and suitable with regard to the site of destination, and show no positive results in eco-toxicology testing. sea coastal land beach capping nourishment

33 Law n 84/94 article 5 clause 11 quater: materials coming from dredging and reclamation activities, if they are not dangerous either at origin or following treatment aimed exclusively at the removal of pollutants, excluding therefore those processes aimed at the immobilisation of the same pollutants, such as those of solidification/stabilisation Law n 84/94 article 5 bis clause 2, letter c): whenever = they result not dangerous at origin or following treatment aimed solely at the removal of pollutants, excluding therefore those processes aimed at the immobilisation of the same pollutants, such as solidification/stabilisation BASINS Ministerial decree 7/11/28, article 2 clause 3 Dredged materials that show, also following treatment aimed exclusively at the removal of pollutants, contamination levels above those laid down in table 1, attachment 5, part IV, title V of the legislative decree 152/6, but below those foreseen in attachment D part IV of the legislative decree 152/6, may be backfilled in containing structures

34 MANAGEMENT HYPOTHESES REMOVAL From the water circuit to authorisation for use

35 THE BASINS From containers as a complement of the reclamation intervention to port works NATURE A list of the projects attached to the Presidential Decree of 12/4/96 12/4/96 entitled Act of reference and coordination for the activation of article 4, clause clause 1 of the law n n 146 of 22/2/94 concerning dispositions regarding evaluations of environmental environmental impact impact Recovery of soil from the sea Definition article 5, Environmental Code - environmental impact: impact: the qualitative and/or quantitative alteration of the environment, direct or indirect, short or long term, permanent or temporary, single or cumulative, positive or negative, environment environment being understood as a system of relations between anthropic, anthropic, naturalist, chemicochemico-physical, climatic, landscape, architectonic, cultural, agricultural and economic factors, coming coming about as a consequence of the activation on the territory of plans or programmes or projects projects in the various phases of their realisation, management and divestment, as well as possible possible malfunctions; Definition article 2, Ministerial Decree 471/99 - Environmental clean up: interventions for environmental and landscape requalification, making up a component component of the reclamation interventions in the cases where such are requested, that allow the recovery on the site of an effective and definitive usability for its proposed usage, in conformity with the VALID planning instruments, ensuring preservation of the quality of the the environmental matrices. Definition article 24, Environmental Code - Clean up and environmental clean up: interventions for environmental and landscape requalification, also also making up a complement to reclamation interventions and those made to ensure permanent safety, that allow the recovery on the site of an effective and definitive usability for for its proposed usage in conformity with planning instruments

36 FUNCTIONS PROGRAMMING Environmental requalification Port infrastructure works Effectiveness, efficiency and economic management for the P.A.