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AA/EOE <br />Braun Intertec Corporationp <br />11001 Hampshire Avenue Sp <br />Minneapolis, MN 55438 <br />Phone: 952.995.2000 <br />Fax: 952.995.2020 <br />Web: braunintertec.com <br />May 9, 2023 Project B2204011.00 <br />Mr. Brad Fisher, PE <br />Bolton & Menk, Inc. <br />12224 Nicollet Avenue <br />Burnsville, MN 55337 <br />Re: Sediment (Dredge) Sampling Report <br />Ponds 1, 2, 3 <br />Colleen Avenue <br />Arden Hills, Minnesota <br />Dear Mr. Fisher: <br />As authorized, Braun Intertec Corporation completed the pond and wetland sediment sampling activities <br />at three stormwater ponds, referred to as Pond 1, Pond 2, and Pond 3, in Arden Hills, Minnesota. The <br />objective of the work was to characterize the in-place sediment (future dredge material) for potential <br />disposal purposes of the sediment across Pond 1 and Pond 2, and in the northern portion of Pond 3. In <br />accordance with your description, the Site was evaluated as a Municipal Separate Storm Sewer System. <br />Sediment Sampling Procedures <br />The above-referenced ponds each had a surface area of less than one acre and therefore, required two <br />sample locations per Minnesota Pollution Control Agency (MPCA) guidance. The samples were comprised <br />of sediment composites from the 0- to 5-foot interval (or a shorter interval that was appropriate based <br />on the sediment thickness) from up to three sampling probe locations per analytical sample. <br />The additional probes were conducted in order to create a more representative sample of the sediments <br />that will be dredged from those areas of the pond. <br />Sample locations and associated composite areas are depicted on Figure 1. <br />During sampling activities, soil sample textures were evaluated by visual methods as the samples were <br />collected and noted in the field notes. Drilling tools were cleaned prior to and between sampling runs by <br />washing the equipment with a brush and potable water containing trisodium phosphate and rinsing the <br />equipment with deionized water. <br />The samples were transferred to clean laboratory-supplied containers, preserved in accordance with <br />Braun Intertec Standard Operating Procedures (SOPs) and transported to the laboratory for analysis. <br />Chain of Custody was initiated at the time of sampling and maintained throughout the process.