## 4 Methods
### Economic Evaluations  
The economic aspect has a decisive influence on the policy of choosing interventions. The verification of the environmental compatibility of a project determines the forecast of a series of works (partly not foreseen in the initial project), with a consequent increase of the costs of realization of the intervention.  
The attention, therefore, was focused on the convenience of providing for certain interventions, based on the ratio between the cost of the individual intervention and the percentage increase in compliance with environmental requirements (CAM).  
The initial amount of the project is 16,748,700,00 \(\epsilon\) (calculated on the basis of Italian costs), for an intervention having the following characteristics:  
* Residential function: 1200 m\({}^{2}\);
* Commercial function: 1800 m\({}^{2}\);
* Arrangement of outdoor areas (parking, public gardens, sidewalk and rest areas): 38,000 m\({}^{2}\).  
The cost of each additional intervention (necessary to reach the minimum thresholds of the CAM) has, therefore, been calculated. The costs of the various interventions (relating to the fulfilment of the parameters) were related to the contribution (in percentage) that each intervention is able to provide in terms of satisfaction of the CAM.  
\begin{table}
\begin{tabular}{l c c} \hline \hline  & **Satisfaction** & **Score** \\  & **CAM** & \\ \hline
**3. Soil consumption reduction and maintenance of soil permeability** & & \\ \hline
3.2 Permeable land area of not less than 60\% of the project area not built & & \\
3.3 Area to be allocated to green areas equal to at least 40\% of the project area not built on and 30\% of the total area of the lot & +5.34\% & +3.24 \\
3.4 In public green areas, at least 40\% tree cover and at least 20\% shrub cover & & \\ with native species must be guaranteed. & & \\
3.5 Use of drainage materials for pedestrian and vehicular urban areas & & \\ \hline
**7. Reduction of the impact on the surface and underground river basin system** & & \\ \hline
7.3 Realize plants for the purification of first rain water from draining surfaces & +1.87\% & +1.02 \\ subject to pollution & & \\ \hline
**8. Primary infrastructure** & & \\ \hline
8.1 Road system (Interventions for parking areas) & & \\
8.1.1 Coverage with suitable masks equal to at least 10\% of the gross area & +0.34\% & +5.52 \\
8.1.3 Creating roofs with photovoltaic shelters to serve the lighting system of the car park & & \\ \hline
8.2 Collection, purification and reuse of rainwater & +1.52\% & +1.14 \\ \hline
8.2.1 Create a system for the purification and de-oiling of water coming from & & \\ polluting surfaces according to UNI/TS 11,445 standard for the reuse for & & \\ irrigation purposes or to feed the storage boxes of toilets & & \\ \hline
8.3 Public green areas irrigation network & & \\ \hline
8.3.1 Use drip irrigation systems powered by renewable energy sources designed & +1.36\% & +1.02 \\ according to UNI/TS 11,445 & & \\ \hline
8.4 Material and waste collection and storage areas & +1.12\% & +0.84 \\ \hline
8.4.1 Establishing areas for local separate collection & & \\ \hline
**9. Secondary infrastructure and sustainable mobility** & & \\ \hline
9.5 Network of protected footpaths and/or cycle paths with suitable tree and/or & +2.3\% & +1.38 \\ shrub accommodation & & \\ \hline \hline \end{tabular}
\end{table}
Table 13: Interventions on the whole sector, with relative the percentages of CAM satisfaction and corresponding scores.  
The following table (Table 14) shows the percentage increase in the initial cost, in relation to the implementation of each individual intervention.