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Appendix A <br /> Frequently Asked Questions <br /> About <br /> Tiered Approach to Corrective Action Objectives (TACO) <br /> Ground Water Ordinances <br /> (Revised May 23, 2011) <br /> Background: The soil under many existing and former service stations is often <br /> contaminated with gasoline or the various chemical components of gasoline. The original <br /> source of the soil contamination may be from leaking underground storage tanks or from <br /> spills that may have occurred over time. Contamination may have spread into the soil <br /> under other properties including adjacent highways or streets. The Illinois Pollution <br /> Control Board has established rules for correcting or managing the soil contamination <br /> both on the service station site and on the adjacent public streets. These rules often result <br /> in the implementation of a Ground Water Ordinance along with other options. <br /> 1. What is a TACO Agreement? <br /> A Tiered Approach to Corrective Action Objectives or"TACO" is a method used by the <br /> Illinois Environmental Protection Agency(IEPA) for developing remediation objectives <br /> for contaminated soil and groundwater resulting from leaking underground storage tanks. <br /> These remediation objectives generally take the form of Highway Authority Agreements <br /> or Ground Water Ordinances. They protect human health and take into account site <br /> conditions and land use. Remediation objectives generated by TACO agreements are <br /> risk-based and site-specific. <br /> 2. Does the City currently enter into Highway Authority Agreements? <br /> Over the past several years, the IEPA has modified the required language in its Highway <br /> Authority Agreements. A major change was to increase the City's responsibility and <br /> liability over contamination that may enter its right of way from adjacent properties. <br /> Although supplemental agreements may be enacted to place requirements on the owner <br /> of the contaminated property, through the Highway Authority Agreement as currently <br /> written, the IEPA may still require the City to bear the ultimate liability for <br /> contamination in its right of way. At this time, City staff is recommending against <br /> entering into Highway Authority Agreements. <br /> Appendix A, Page 1 <br />