Proposal – Groundwater Well Closure Monitoring and Statistical Analyses for MW-13 for Biosolids Lagoon No. 4 - Keramida Inc.

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Mr. Andrea.!tlexarader I°e&ruag 13, 2020 KERAMIDA Proposal Nee. I'23537 Pape 3 surveyed prior to the next scheduled monitoring event. Costs for disposal of the generated well installation wastes and surveying the wells can be provided by KERAMIDA on request. Task 2: Grou nLiNvater Statistical Analy i It is KERAMIDA's understanding that the groundwater sampling field activities will be performed by the City of South Bend. Following completion of each sampling event (May 2020 and October 2020), the City of South Bend will provide the groundwater data to KERAMIDA. KERAMIDA will then evaluate the data to determine whether there is a statistically significant increase over background values for each constituent listed in Section E9, Ground Water Monitoring Requirements of the January 14, 2008 IDEM approval letter. The evaluation will be performed for wells MW-4, MW-5R, MW-7R, MW-8, MW-9R, MW-11, MW-12, MW-13, and two newly installed groundwater monitoring wells. KERAMIDA will use the same statistical program (DUMPStat) and statistical procedures and methodologies used in previous years. The intent of the evaluation is to provide a ninety-five percent (95%) level of confidence to determine if a change in the concentration of a constituent has occurred or if groundwater quality standards have been exceeded, based on the information obtained during sampling, as well as the results of previous sampling events by the City of South Bend. KERAMIDA will follow the guidelines set forth by the IDEM's Analytical Data Deliverable Requirements. KERAMIDA will summarize the results of each statistical evaluation in a semi-annual Statistical Evaluation Report, which will present the results of the statistical evaluation, along with the distribution assumptions. Each report will be submitted to the City of South Bend in draft form for review and comment. Three paper and two electronic copies of the final report will then be submitted to the City of South Bend, who will be responsible for forwarding the document to the IDEM. The estimated cost to complete the scope of work detailed in this proposal is $21,255 as detailed in Table 1 below. All costs will be invoiced on a lump sum basis, with billing concurrent with completion of each item. Other terms and conditions will be in accordance with the attached KERAMIDA Standard Terms and Conditions. Table 1