Critical parameters as bases for environmental evaluation

A car washing and lubricating (also doing repair and maintenance activities) company which is located close to an estuary ecosystem has been operating for several years (more than 10 yr) in a terrain with the following characteristics: porous, filterable with a freatic level near to the surface (1.5 m depth). This estuary ecosystem is quite useful for them since they discharge all the disposals and waste generated by this activity directly into the estuary. These disposals contain a high level of oils and greases. All the dumping from the car maintenance goes directly into the soil since there are not palettes or gutters. The repair and the lubricating company operate for 8 hours per day for 6 days per week.

Immediately when the local people complained, the Municipality within which the company is operating has arranged the execution of an EIA and you are part of it. As a member of the group who will undertake the EIA, you are then required to answer the following questions:
What are the critical parameters as bases for environmental evaluation that has to be performed by the Municipality in view of the above case?
What type of professionals (the minimum that you can propose) will be part of the consultancy group that will conduct the EIA?
Cite 3 major environmental impacts of this activity and the corresponding mitigation measures you will propose as part of your Environmental Management Plan (EMP) to mitigate the impacts identified.
Give 3 or more critical success factors (CSF) that have significant effects on the successful implementation of the company’s EMP