A. That the applicant would suffer substantial injury or detriment by the refusal to grant the permit or modify or delete the conditions;

B. That no other method of obtaining the desired results is more reasonable or less likely to be dangerous than that proposed by the applicant; and

C. That the granting of the permit or the modifying or deleting of conditions would not be materially detrimental to the public interest, safety, health and welfare; would not significantly restrict the carrying capacity of a watercourse; and would not create an unreasonable hazard of flood or inundation to persons or property.