Screening a photovoltaic farm on garigue

Screening should consider scale, location, sensitivity and cumulative effects. The project is 12 ha, above many thresholds for industrial installations, and includes grading, a fence and 3 km of trench. The site is not legally protected but contains 14% intact low garigue with an endemic plant and orchids; endemic species are a screening trigger because impacts may be irreversible. The nearby Natura 2000 site 400 m downwind is sensitive to dust, and the quarry extension creates cumulative dust and traffic impacts. The cable trench crosses agricultural land, so land-take and soil compaction matter. The project's purpose is environmentally positive, but that does not remove the need for EIA; it may affect the alternatives analysis rather than the screening decision. A full EIA is likely required because of the combination of sensitive biodiversity, cumulative effects, and potential for significant dust and habitat loss. If the intact garigue were avoided entirely by redesign, screening could be reconsidered. The decision should be documented with reasons, not left as a judgement that the land is degraded.

Scoping should cover biodiversity, including a seasonal plant survey, the endemic rock-centaury population size and viability, orchids and invertebrates; dust dispersion and deposition on the Natura 2000 site; soil and hydrology, including grading, compaction and runoff; landscape and visual effects; traffic and cable-trench construction; grid connection; security lighting and bird collision; and cumulative effects with the quarry. Alternatives should include: locating the array only on the invaded or rubble portion, avoiding the 14% intact garigue; using elevated panels or micro-siting to retain vegetation; routing the cable along existing roads; reducing fence lighting; and considering rooftop photovoltaics as an alternative. The no-development alternative should also be assessed. Scoping should define the baseline and significance thresholds, and require a construction environmental management plan. Public consultation should include the farmers and the Natura 2000 site manager. The EIA should not treat degraded land as zero value; the intact patches are the sensitive receptor.

The mitigation hierarchy starts with avoidance: micro-site or reduce the array footprint to avoid the intact garigue, which is feasible and should be the first requirement. Minimisation should include dust suppression, timing works outside flowering, wildlife-permeable fencing and no unnecessary lighting. Restoration should revegetate disturbed areas with local-provenance seed. Offsets should apply only to residual, unavoidable impacts. For an endemic plant, offsets are weak because the species has specific habitat requirements and its population may be small; translocation of the Maltese rock-centaury is not proven and may fail. A biodiversity offset would require a measurable gain, such as managing another garigue site, with a high replacement ratio and long-term security. But an offset cannot justify destroying the only local population. I would reject an offset that allows loss of the intact 14% and require avoidance. If residual loss is small after avoidance, a contribution to a local conservation management plan could be acceptable, but not as a substitute for legal protection. The decision should be precautionary.