Appendix B Environmental Screening Report.pdf

APPENDIX B

ENVIRONMENTAL SURVEY

Environmental Screening Chièvres Air Base 27 March 2020

Introduction

Localisation

The pipes layout crosses three municipal boundaries in two districts: Chièvres, Brugelette (district of Ath) and Lens (district of Mons). The length of the layout is approximatively 12 km (8 km circumference) and it circles an area of approximatively 380 ha.

The position of the center is: X_LB72 (m): 112134,27081544684. Y_LB72 (m): 141044,0346334502.

All utility system repairs will require significant trenching of utility runs, site restoration, and landscape restoration.

The domestic water supply system repairs include the following items:

• Upsizing the potable domestic water supply main lines.

• Upsizing potable domestic water service lines.

• Point of entry of Perfluoroctane Sulfonate (PFOS) removal through an ion exchange system at the Chièvres and Brugelette connection areas (2 locations) to return the Chièvres connection back to operation.

• Backflow preventer to inhibit unwanted flows into the potable domestic water system.

• Repairing water meters.

• Repairing service connections.

The fire protection system repairs include the following items:

• Separating the potable domestic water supply system from the fire protection system.

• Upsizing of the fire protection main lines.

• Repairing the failing fire hydrant assemblies.

• Repairs to support fire flows with a fire service booster pump.

The Sanitary sewer system repairs includes rerouting of force mains and sewage flows to the municipal sanitary sewer treatment facilities in the City of Brugelette, including the repairs to the following items:

• Force main lines.

• Force main cleanouts.

• Force main connections.

• Wet well / dry well station.

• Sewer pump.

Work to be performed (Source: W912GB19D0011 Utility Repair Project. Chièvres Air Base, Benelux, Belgium. 19 September 2019)

This table summarizes the environmental screening survey requested by TPF SA for the installation of new mains on the Chièvres Air Base (CAB).

The new water grid construction project consists in repairing the existing installations and the realization of new:

• domestic potable water supply system;

• non-potable fire protection system;

• domestic wastewater sanitary sewer system.

As well as trenching for domestic water, fire water, and sanitary sewer; underground electrical feed 100A; and site restoration.

Situation along the pipes layout

Constraints and environmental restrictions

Figures

Schéma de Développement du Territoire (SDT)

Territorial Development Scheme The pipes layout is not directly concerned by the SDT. No constraint.

Plan de secteur

Regional plan

The assignment (=affectation ) of the lands along the pipes layout is mainly dedicated to Public Services and Community Facilities

(=Services publics et équipements communautaires ).

However, the pipes layout in the south goes through another assignment of agricultural area.

To the east, the pipes connections lead to a rural housing area.

No constraint.

Périmètres de protection

Protection perimeters There are none along the pipes layout. No constraint.

Guide Régional d’Urbanisme (GRU)

Regional Guide of Urbanism There are none along the pipes layout. No constraint.

Schéma de Développement Communal (SDC)

Municipal Development Scheme None of the three municipalities has a SDC. No constraint.

Schéma d’Orientation Local (SOL)

Local Policy Framework There is nothing in the SOL concerning the area of the pipes layout. No constraint.

Guide Communal d’Urbanisme (CGU)

Municipal Guide of Urbanism None of the three municipalities has a GCU. No constraint.

Périmètre de Reconnaissance Economique (PRE) There are none along the pipes layout. No constraint.

Site à réaménager (art.D.V.1) et Site de réhabilitation paysagère et environnementale

(art.D.V.7)

There are none along the pipes layout. No constraint.

LAND PLANNING TOOLS

REGIONAL LEVEL

MUNICIPAL LEVEL

Operational tools

Environmental restrictions Figures

Périmètre de Remembrement Urbain (art.D.V.9) There are none along the pipes layout. No constraint.

Périmètre de Revitalisation Urbaine (art. D.V.13) There are none along the pipes layout. No constraint.

Périmètre de Rénovation urbaine (art.D.V.13) There are none along the pipes layout. No constraint.

Zones d’initiatives privilégiées (ZIP) (art.D.V.15) There are none along the pipes layout. No constraint.

Permis d’urbanisation (art. D.IV.22)

Permits to divide plots of land

The installation of pipes does not require a permit. In case of an application for a public planning permit (=permis d’urbanisme public ), it is the competence of the delegated Official

(=Fonctionnaire délégué ) in the Walloon Region.

No constraint.

Programme Communal de Développement Rural

(PCDR)

Municipal Program for Rural Development

• CHIEVRES (INS code 51014): The second PCDR is being developed in November 2019. We did not receive the document from the municipality.

• BRUGELETTE (INS code 51012): The PCDR was approved in

October 2017. We did not receive the document from the municipality.

• LENS (INS code 53046): The municipality has not yet developped a PCDR.

No (known) constraint.

Plan Communal de Développement de la Nature

(PCDN)

Municipal Plan for the Development of Nature

• CHIEVRES: There is an active PCDN signed in 2017 but we did not receive the document from the municipality.

• BRUGELETTE: The municipality has not yet developped a PCDN.

• LENS: The municipality has not yet developped a PCDN.

No (known) constraint.

Others

Environmental restrictions Figures

Atlas des chemins et sentiers vicinaux

Paths and rural trails

List of Paths (C) and Trails (S) crossing or following the pipes layout: C2, C3, C4, C8, C9, C14, C21, C22, S39, S60, C64, S65, S92, C94, C95, S96, S97, S98, S104.

The site visit showed that most of the small paths and trails are no longer visible (C9, C21, S64, S97, S104, etc.)

Some of the big paths are them still visible (C2, C3 for some parts, etc.), their intergrity must therefore be conserved.

There is no constraint as long as no path or trail is modified or removed.

Biens classés

Classified monuments, sites, architectural complexes, archaeological sites, etc.

There are none along the pipes layout. No constraint.

Biens mondiaux (UNESCO)

World Heritage listed by UNESCO There are none along the pipes layout. No constraint.

Inventaire du Patrimoine Immobilier Culturel

Inventory of Cultural Real Estate Heritage There are none along the pipes layout. No constraint.

Cartes archéologiques

Archaeological maps

There are two zones where the pipes layout crosses an area listed in the archaeological map.

• at the northwest end (code 7557)

• and at the southeastern end (code 7150).

The COPAT says that the competent authority shall seek the simple advice of the AWaP for property listed on the archaeological map.

There is a possibility of constraints. Refer to

AWAP for more details.

MOBILITY

HERITAGE

Environmental restrictions Figures

Conservation de la nature (réserves naturelles, zones humides d'intérêt biologique, sites

Natura2000) .

Nature conservation

There are none along the pipes layout. No constraint.

Site de Grand Intérêt Biologique (SGIB)

Site of Great Biological Interest

There are none along the pipes layout.

For the record, there is:

• at 1,7 km nordeast named "Décanteurs de l'ancienne sucrerie de Brugelette " (SGIB 97);

• at 2,8 km west: (SGIB 3352) humid zone named "Le Courtil

Gras " with its federal natural reserve (LCN-RND 6448), a protected area of 0.88 ha.

There is no constraint as the construction work for the new watergrid will not interfer with the SGIB.

No constraint.

Arbres et haies remarquables (AHREM)

Remarkable trees and hedges

There are no listed remarkable trees along the pipes layout.

However, the site visit revealed a row of 14 Lime trees (Tilia cordata/platyphyllos), with a circumference between 1.3 and 2.5 m, on the crossroads of the Domestic Water pipes and the Sanitary

Sewer pipes. These trees fall into the AHREM definition and are therefore protected. Their removal requires a permit.

The modification or removal of the trees requires a permit.

Bords de route en fauchage tardif

Late mowing

There are none along te pipes layout.

For the record, there is a late mowing area with a safety band located less than 250 m southwest from the pipes layout, but outside CAB.

No constraint.

ENVIRONMENT

PROTECTION TOOLS

Environmental restrictions Figures

Faunistic and floristic survey

The ecological value of the lands around the pipes layout is relatively low. The pipes layout surroundings are mostly macadam roads, grass and some crops and meadows.

Floristic survey (Species found on CAB):

• Tilia cordata/platyphyllos (Lime=Tilleul): row of 14 trees

(circumference between 1.3 and 2.5 m)

• Achillea millefolium (Achillée millefeuille)

• Tanacetum vulgare (Tansy=Tanaisie vulgaire)

• Divserse crops (potatoes, sugar beeds, etc.)

Faunistic survey (Species found on CAB):

• Rabbits (two observed)

• Crows

No constraint.

Berce du Caucase

Giant hogweed

The Giant hogweed is an invasive alien species whose spread must be monitored. There is an area where this plant has been reported about 1.4 km north of the pipes layout. The site visit did not reveal the presence of the plant.

No constraint.

Wateringues

Wateringues are ditches or drainage works intended to dry wetlands and allow the realization of agricultural activities. There are none along the pipes layout.

No constraint.

Réseau hydrographique

Natural water system

Existing river contract (=Contrat de rivière ): La Dendre .

Administrative District of Water Management: Mons.

Extract: "Le linéaire de cours d’eau non inventorié correspond principalement aux cours d’eau non classés et dans une moindre mesure aux cours d’eau classés inaccessibles (ruisseaux voûtés, ou encore cours d’eau traversant la base militaire de Chièvres, etc.). "

Surface water body (=Masse d'eau ): DE02R

Stream name : Ruisseau de la Brune

Category: non-navigable waterstream of 2nd and 3rd category, with a non-visible section running along the entire eastern edge of the pipes layout (voutement ).

The pipes layout crosses the path of the stream on 6 locations (red dots on the map).

The site visit showed that the waterstream is not visible on surface, but is channeled

(canalisé ) underground. This should be taken into account during site works.

However, provided that the laying of the pipes has no influence on the sluice (=pertuis ), there should be no constraint.

Environmental restrictions Figures

Zones de consulation de la DRIGM (Risques liés à l’exploitation souterraine: carrière, puits de mines, karst)

The Atlas of Walloon karst shows some fault lines crossing the pipes layout. The project is located in the Carboniferous Limestone area(=zone Calcaire du Carbonifère ). There is no application for this study.

No constraint.

Aléas d’inondations (par débordement de cours d'eau et par ruissellement)

Flood hazards (by overflow of streams and runoff)

The pipes layout is covered in many places by medium and high flood hazards (=aléas d'inondation ), due to water runoff

(=ruissellement ).

The site visit showed that infiltration of water into the soil is generally bad. Numerous fields were impregnated with water or even flooded (stagnant water), runnels along the paved roads. The observed flooded zones match with the map.

The project must not interfere with hydraulic continuity (meaning that it must not change the natural flow of water) nor affect the soil sealing.

There is no impact as long as the land is rehabilited/restored after the work.

Seveso sites There are none along the pipes layout. No constraint.

Terrils

Spoil heaps

Terrils are deposit of mineral substances resulting from the activity of the coal mines. There are none along the pipes layout.

No constraint.

Zones vulnérables aux nitrates

Areas vulnerable to nitrates

These zones are groundwater protection zones against nitrates of agricultural origin. The pipes layout is within a zone vulnerable to nitrates known as "Nord du sillon Sambre et Meuse" . There is no application for this study.

No constraint.

GEOTECHNICAL STRESSES

ANTHROPOGENIC STRESSES

Environmental restrictions Figures

Captages et périmètres de protection

Groundwater abstraction and protection perimeters

A prevention perimeter is located directly along the pipes layout, to the west. The plots concerned by this perimeter are: 63B, 63D, 94D, 95A, 96A, 101A, 102.

The perimeter is composed of a remote prevention zone (=zone arrêtée de prévention éloignée (IIb) ) which runs along the pipes layout, and a close prevention zone (=zone arrêtée de prévention rapprochée (IIa) ), which is located less than 250 m to the west.

The underground water work (=ouvrage de prise d'eau souterraine ) category B drinkable (=potabilisable ) code 38/6/5/007, named

Chièvres P1 .

"19 mars 2003 - Arrêté ministériel relatif à l'établissement des zones de prévention rapprochée et éloignée de l'ouvrage de prise d'eau souterraine dénommé : Chièvres P1, sis sur le territoire de la commune de Chièvres (M.B. 06.05.2003).

No constraint.

Banque de données de l'état des sols et sous-sols (BDES)

Soil condition database

The pipes layout crosses plots for which soil management procedures have been carried out or are to be expected (Article 12

§2 and 3 of the Decree), known as the peach color . The peach color means that the parcel is subject to the obligations of the Soil

Decree, but does not necessarily indicate that the soil is polluted or that measures must necessarily be taken. There is indeed a series of derogations.

No constraint but it should be noted that the Walloon legal framework for land moves will soon change (May 2020) with the coming into force of the AGW of 5

July 2018 on land management and traceability. This arrêté also sets the conditions for on-site land reuse.

There is no significant environmental contraint along the pipes layout.

However, attention should be paid to the following points:

• existing paths and trails must not be modified or removed;

• the archeological map must be consulted (refer to AWAP for more details);

• the modification of the row of remarkable trees (AHREM) requires a permit;

• the laying of the pipes must have no influence on the sluice (=pertuis);

• the land must be rehabilited/restored after the work.

• the Walloon legal framework for land moves will soon change (May 2020) and the BDES might need to be consulted next year.

CONCLUSIONS