Professional Services Agreement - Indiana Finance Authority Indiana Brownsfield Program

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Response to RggmgA _!r Prtirnarsahs for Fnvhrorprnentai AssessnienL t nder ropxnd Storaee Tank Ndarnp�s�°«r1 urrrtl . ,r�r�ahipaaisara Services, '¢ rraz r° a ac"s Marathon Service Saation Vadfitv in Souih Bend. dcpc ra I uo 2ti7w,,p i #P 019-07-V 41 Page 5 aromatic hydrocarbons (PAHs) using USEPA SW-846 Method 8270SIM and lead using USEPA SW-846 Method 6010B. Should groundwater be encountered in the UST/soil excavation pit(s), one groundwater sample will be collected from each UST pit and submitted for laboratory analysis of VOCs using USEPA SW-846 Method 8260, PAHs using USEPA SW-846 Method 8270SIM, lead using USEPA SW-846 Method 6010B and lead scavengers using USEPA SW-846 Method 8011. Should groundwater not be encountered during the UST removal activities, groundwater samples will be collected for confirmation as part of the larger Phase II ESA activities to be completed at the site if warranted. Laboratory quality assurance/quality control (QA/QC) samples will be collected for this confirmatory sampling event. All soil and groundwater samples collected will be placed on ice and delivered to Pace Analytical Services, Inc. (Pace) in Indianapolis, Indiana for laboratory analysis. Samples will be delivered to the laboratory under Heartland chain -of -custody protocol. Prior to the backfilling of the excavation pit(s), oxygen releasing agents will be introduced into the base of the excavation pit(s). The exact volume of oxygen releasing agent to be applied will depend on the size of the excavation area. It is anticipated that no more than 1,000 pounds of this material will be introduced. If placement of these materials into the UST pit(s) is not feasible, these materials will be introduced into the area of excavation via direct push injections. Oxygen releasing agent introduction will only be utilized if determined necessary after the completion of site remedial action and after consultation and approval from the IBP Project Manager. Please note, for purposes of this proposal, Heartland is proposing to the IBP to utilize EOS Remediation, LLC's EOxTM, a product similar in nature, with similar chemical and physical properties, to that of the typical ORC Advanced® compound utilized on similar IDEM and IBP projects sold by Regenesis, Inc. A product specification sheet for EOxTM can be provided upon request. Heartland is including prices for both EOxT" and ORC Advanced® with this proposal for the IBP's evaluation. After the completion of the UST removal, a UST Closure Report will be prepared. The UST Closure Report will document site activities, confirmation sampling activities, disposal locations, and adherence of the UST closure activities to IDEM Remediation Closure Guide (RCG) guidance. Figures of the site with the locations of confirmation samples and tabulated analytical results will be provided as part of this report. Both the field oversight of the UST removal and the final report will be completed by a State of Indiana licensed UST inspector. 2.3 Subsurface Investigation Heartland's approach during subsurface investigations is designed to identify the vertical and horizontal extent of soil and/or groundwater contamination, the contaminant transport mechanisms, probable sources, and potential receptors of the contamination. Before initiating sampling activities, Heartland will prepare a site sampling and analysis plan (SAP) and update the site -specific HASP for review and approval of IBP staff and any applicable state and/or