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��� Pc Exn�a�c r <br /> �. <br /> Technica� WEI��CK <br /> Memo � . , <br /> �o����� <br /> Excepr;ona�outcornes. <br /> To: Mr. ]on Fletcher <br /> Lake West Development <br /> From: Kelly]aworski, Wenck Assoaates, Inc. <br /> Michelle Hos�ield, Wenck Associates, Inc. <br /> Date: ]uly 8, 2015 <br /> Subject: Test Pit Sampling Data Report for Proposed Eisfnger Development <br /> On ]une iz, 2015 Wenck Associates Inc. (Wenck) was requested by Lake West <br /> Development to sample test pits at the Eisinger Property located at 3234 Wayzata <br /> Boulevard in Orono, Minnesota (the Subject Property}. The entire Subject Property consists <br /> of approximately 28.8-aa-es of vacant land and a former residence. Approxlmatefy 12-acres <br /> of the Sub3ect Properry are occupied by an unpermitted dump. Access to the Subject <br /> Property is from Wayzata Boulevard (old Highway 12). The Subject Property location and <br /> test pit sampling locations are deplcted on Figure 1. <br /> Prior to sampling, approxlmately 30 test pits had been camp[eted by Lake West Excavating <br /> througi�out the 12-acre property prior to a Wenck Field Techniclan being present. On June <br /> 12, 20].5, a Wenck Field Technfcian was present to inventory the debrfs and to select four <br /> test pits across the property for sampling. One soll sample was collected from each of the <br /> four of the test pits and analyzed for the Eight Resource Conservation and Recovery Act (8 <br /> RCRA) metals, volatile organic campaunds {VQCs}, polynu�lear aromatic hydrocarbons <br /> (PAHs), polychlorinated biphenyls (PCBs), and dlesel range organics {DRO). Each of the test <br /> pits showed evidence of dumped material consisting of household waste includfng glass, <br /> wood and plastic. Demolition debris Induding concrete, rebar, metal, and bhcks was also <br /> observed in some of the test plts, The entire extent of the debris could not be assessed at <br /> the time due to the backhoe being unable to wmplete the test plts to greater depths. The <br /> debris was capped by approximately 5 to 15 feet of sandy clay �II in aU of the test pits, <br /> A Wenck Fleld Techniaan sampled the stockpiled solls within the debris layer and noted the <br /> top of debris in each of the four test p(ts that were sampled, Soil screening for volatile <br /> organic compounds (VOCs) using a photofonizatlor� detector fn the fieid did not indicate <br /> headspace readings above 1.5 parts-per-mtllion (ppm) In the four samples collected. <br /> Soil Sample Anatytical Reaults <br /> SoIE fnvestlgatfon data resuits were compared to the Mfnnesota Pollutlon Control Agency's <br /> Tier i ResidentEal and T1er 2 Industrial Soi! Reference Values {SRVs). Additionally, Tier 1 Soil <br /> Leaching Values (SLVs) were referenced to evaluate the potential risk to gtoundwater at the <br /> Site from the sofl-to-groundwater leaching pathway, There are no establlshed MPCA SRVs or <br /> SLVs for DRO, but the MPCA has established an unregulated soEl reuse guidance of 100 <br /> mg/kg for DRO. <br /> Soif sampie results are summarized in Table 1. The TestAmerica l..aboratory reports and <br /> supporting chain-of-custody documentation are EncEuded in Attachment A. <br /> Wenck Assotiates,Inc, � 1800 Pioneer Creek Center � P.O. Box 249 � Maple Plain, MN 55359-0249 <br /> Toll Free 808-472-2232 Main 763-479-420U Email wenckmp@�wenck.com Web wenck.tom <br />