TABLE OF CONTENTS The TACO rules establish procedures for developing remediation objectives for soil and groundwater at remediation sites based on risks to human health, taking into account the existing pathways for human exposure and current and future use of the remediation site. The methodology consists of a three tiered approach for establishing remediation objectives. The tiers can operate fully independent of each other, and it is not necessary to perform a Tier 1 analysis before performing a Tier 2 or Tier 3 analysis, or to perform a Tier 2 analysis before performing a Tier 3 analysis. Each successive tier allows the person conducting a remedial investigation pursuant to the Act (hereinafter referred to as the applicant ) to rely on more site-specific information, and requires a concomitant increase in the level of site-specific investigation and analysis under Part 742.
As a prerequisite to using the tiered approach to establish remediation objectives, the applicant must determine the contaminants of concern at the site. This is done by conducting a site investigation under the applicable remediation program; such investigation is not part of the TACO process. Again, the programs with which TACO is to be used include the Underground Storage Tank program at Part 732, the Site Remediation Program proposed at Part 740, and the RCRA Part B Permits and Closure Plans at Parts 724 and 725. As mentioned at the outset, these programs govern the activities at the site which address the contamination, including the scope of...
