A diagnostic report of September 15, 2005 which took place over fifteen weeks in the field and the findings made by the demining service made it possible to map the anomalies detected with a listing for each object of the position to the nearest cm, estimated depth, diameter, volume and inclination.
This diagnosis highlighted the presence of more than 25,000 magnetic anomalies with a probability of having for origin an ammunition, that the whole site is polluted by ammunition buried in the field of origin which are at the site of old furnaces (ammunition destroyed or not or destroyed), buried voluntarily by the German troops, in or under the merlons [petites munitions regroupées et enterrées soit en 1944 (munitions allemandes et autres) soit lors de la reconstruction des merlons (fin de la décennie 1 950)]
A second soil expert report in 2010
The estimate and financial of the company Pytechnis dated November 20, 2010 also finds its origin in the spreading of the land of the merlons during the development works of the site in 2005.
This pollution is composed of munitions and explosive ordnance waste and projected and located in the basement in the immediate vicinity of the destruction zones (furnaces) and in the localized burial areas and on the surface (approximately the first 30 centimeters of the ground natural from 1945) over large areas; this pollution is made up of a very varied range of ammunition calibers from small caliber cartridges to explosive bombs of 250 kg, these objects containing from a few grams to 120 kg of explosives and thus generating very danger zones. different, from a few tens of meters to 1,000 meters, while a certain number of dwellings and various infrastructures are located in the most important danger zones; Approximately 35,000 targets recognized as ammunition or ammunition waste were counted; the cost of the works quantified at 1.6M € and 3.2M € depending on the treated area (24,000 m3 or 100,000 m3) according to estimate on April 5, 2006 was increased to € 2.7M on January 30, 2007, then to more of 4, 75M € for 24 months of works according to updated estimate of January 10, 2011.