Article 30 of the LGEEPA states that: when it comes to activities considered to be highly risky under the terms of this law, the Manifestation of Environmental Impact must include the corresponding Risk Study.

In the regulation of the law of the ecological balance and protection to the environment (LGEEPA) in the field of Environmental Impact Assessment, referred to in article 5 those who intend to carry out the following works or activities, previously the authorization shall be required of the Secretariat, through the submission of an Environmental Impact Assessment (EIS) and points out the works or following activities:

Hydraulic, developing general communication lines, oil pipelines, gas pipelines, carbon pipelines and pipelines, oil industry, petrochemical industry, chemical industry, sugar industry, industry of cement, electricity industry, exploration, exploitation and beneficiation of minerals and substances reserved to the Federation, facilities for treatment, confinement or disposal of hazardous waste, as well as radioactive waste, forest exploitation in tropical forests and species of difficult regeneration, forest plantations, forest areas land use changes, as well as forests and arid zones, industrial parks which provide highly risky activities, real estate developments that affect coastal ecosystems, works and activities in wetlands, mangroves, lagoons, rivers, lakes and estuaries connected with the sea and its coasts or federal areas, works in protected natural areas, fishing activities which may endanger the preservation of one or more species or cause damage to ecosystems, activities aquaculture which may endanger the preservation of one or more species or cause damage to ecosystems, agricultural activities which may endanger the preservation of one or more species or cause damage to ecosystems.

The Article 17 of this regulation, mentions that in the case of highly risky activities under the terms of the law, should include a Risk Assessment..

Mentioned in article 18 of that regulation following the Risk Assessment referred to in the foregoing article, it will be needed to incorporate the following information to the manifestation of environmental impact:

I. Scenery and preventive measures arising from the analysis of environmental risks related to the project.
II. Description of protected areas surrounding facilities, in his case.
III. Marking of safety environmental measures.

Highly Risky Activities

A highly risky activity is defined as: when activity that includes within its management, quantities of substances exceeding those indicated in the 1st. and 2nd, lists of highly risky activities, published by agreement of the Secretaries of the Interior, Urban Development and Ecology.

First highly risky activities listing corresponds to those in which toxic substances are handled, and in that list are exempted explicitly the use and application of pesticides with toxic properties, under that there is no specific legislation for the case, which regulates this activity in particular. This list was published in the Official Gazette of the Federation on March 28, 1990.

Also, on 4 May 1992 issued the second listing of highly risky activities, which corresponds to those that handle flammable and explosive substances. The main feature of these listings, is that it incorporates the concept of quantity of report, i.e., the maximum amount of substances considered in these lists, which handle or store a company and, if this amount is exceeded, the company is regarded as highly Risky, and an environmental risk assessment should be provided.

When an installation is in operation and is in the case mentioned above, you must prepare and submit a Risk Study Comply with the Guide for the development of the Environmental Risk Study; SEMARNAT-07-008 "Presentation of the study of risk to companies who perform highly dangerous substances", and each of the points mentioned therein, must be developed with the sufficient technical depth, capable of supporting the comprehensive evaluation of the installation. Diagrams of pipe and Instrumentation (DTI´s) and levels of the facility, based on detailed engineering, readable and updated, as well as an executive summary of the study of risk must also occur.

One of the main points of the preparation of the studies of risk, is to determine potential rays of affectation, through the application of mathematical simulation models, of the probable maximum risk events identified in the study. .

The risk study should be provided in the General direction of Integral management of materials and Risky activities (DGGIMAR), the Assistant of management for environmental protection, the Secretariat of environment and natural resources (SEMARNAT).

To define and justify the areas of security of the installation into the environment, use the following parameters:

SEMARNAT establishes that there are four different levels of information for the submission of studies of environmental risk.

Level 0 (Land lines)
Level 1 (Preliminary Report of Risk)
Level 2 (Risk Study)
Level 3 (Risk Analysis