Amendment to PSA - Additional EPA Requested Environmental Testing for Beck's Lake Site - Jones Petrie Rafinski Corp.

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Scope of Work Changes and Cost Adjustments Beck's Lake NPL/LaSalle Park Area Attn: Stephanie Steele October 29, 2019 The existing PSA (including the scope and cost changes with the Second Amendment dated August 13, 2019) included costs for general consulting through December 2019. Since the project is ongoing, general consulting will be necessary to assist the City of South Bend with EPA requirements. Remedial action is anticipated to be conducted at the subject site during the calendar year 2020. This remedial action will require additional costs related to general consulting. Therefore, the following cost adjustment includes anticipated general consulting costs through 2020: Project Manager/Senior Geologist @$130/hour — estimated 300 hours for January 2020 through December 2020 at the direction and prior approval of the Project Coordinator. Task 5: Soil Sampling to Define Areas of Concern Net Task Change: $22,100 increase (including costs for field labor, field supplies, laboratory analysis, data validation, surveying, document preparation, and project management). The scope and costs associated with Task 5, as presented in the Second Amendment to the PSA (dated August 13, 2019), were based on a work plan developed following a meeting with EPA and City of South Bend representatives on July 2, 2019 at the EPA Region V Offices in Chicago, Illinois. At the meeting, EPA expressed concern over potential lead exposure to park visitors from surface and near surface soil at the LaSalle Park Area portion of the Beck's Lake NPL Site. Following EPA's and IDEM's recent review of the work plan, additional sampling and analysis was requested by the agencies. The number of soil samples in the areas of concern were doubled resulting in an increase of the original costs as follows: Additional field labor — Geologist 32 hours @ $95/hour Additional field labor and project management — Project Manager 62 hours @$130/hour Additional laboratory analysis and data validation - $9,880 The following is a summary of the overall cost adjustments: CurrentApproved Costs .............. ................ .»»...................... ........ $316,000 NewTotal Estimated Costs ........................ .......... ....... »».............. — $387,100 NetContract Change (increase)..........,.............................».............». $71,100 Please note that the costs presented herein are our best estimate of the time and materials involved in the project which Jones Petrie Rafinski will not exceed without prior approval. Should the scope of services require modification (i.e., additional/less borings, analyses, etc.) based upon field conditions and/or circumstances that would not have otherwise been anticipated, JPR will notify the client of such "changed conditions" and resultant cost implications to the project. Should the ground be frozen, such that soil sampling via manual sampling tools is not possible, a drilling rig will need to be utilized. The use of a drilling rig will add an additional cost of approximately $2,500 per day. 21 Page