Amendments make certain technical corrections and provide clarifying language; lower the definition of "small community" from 20,000 to 10,000 people for the purpose of granting permit modifications for innovative treatment technologies; eliminate the restriction that only 20 percent of any county, borough, or parish may be classified as Type A wetlands; lower the authorization for pollution prevention activities from $50 million per year to $21.2 million, and stipulates that not more than $10 million may be used each year to provide technical assistance to small and rural water treatment works; require written permission from private property owners for Federal employees to enter their property in order to identify or classify wetlands; and clarify the definition of vernal ponds.