N.Y. Comp. Codes R. & Regs. tit. 17, § 15.15
(a) All draft and final EIS's shall be preceded by a cover sheet stating:
(c) The body of all DEIS's and FEIS's shall at least contain the following:
(5) a description and evaluation of the range of reasonable alternatives to the action which are feasible, considering the objectives and capabilities of the project sponsor. The description and evaluation of each alternative should be at a level of detail sufficient to permit a comparative assessment of the alternatives discussed. The range of alternatives must include the no-action alternative and may include, as appropriate, alternative:
(vii) types of actions.
For private applicants, any alternative for which no discretionary approvals are needed may be described. Site alternatives may be limited to parcels owned by, or under option to, a private applicant;
(10) for State agency actions in the coastal area:
(12) if information about reasonably foreseeable catastrophic impacts to the environment is unavailable because the cost to obtain it is exorbitant, or the means to obtain it are unknown, or there is uncertainty about its validity, and such information is essential to any agency's SEQR findings, the EIS must:
(iii) assess the likelihood of occurrence, even if the probability of occurrence is low, and the consequences of the potential impact, using theoretical approaches or research methods generally accepted in the scientific community.
This analysis would likely occur in the review of such actions as an oil supertanker port, a liquid propane gas/liquid natural gas facility, or the siting of a hazardous waste treatment facility. It should not apply in the review of such actions as shopping malls, residential subdivisions or office facilities.