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'@ 202 Val Dervin Parkway, Suite 0400,Stockton,California 95206 <br /> G;7111ESTOGA-R0VERS Telephone: 2099836810 Facsimile: 2099836960 <br /> &ASSOCIATES <br /> Ma 26, 2010 Ref. No.070021 <br /> Mr. Robert Brod <br /> Hydt- Environmental, Inc. <br /> 20700 Watertown Road <br /> Waukesha, WI 53186 <br /> Dear Mr. Brod: <br /> Re: Letter Report,Shallow Soil Excavation,Soil Stockpile Disposal and Site Clean-Up Project, <br /> John Deere Parts Depot 4104 South Aimort Way, Stockton C lliforni 1 <br /> Conestoga-Rovers& Associates (CRA) has prepared this letter report to provide a narrative <br /> description of the field activities and to provide all related documentation of off-Site disposal of <br /> impacted soils from the John Deere Parts Depot property in Stockton,California. All activities <br /> completed as part of this project were in conformance with CRA's proposal to Hyde <br /> Environmental, Inc. (HEI) dated February 11,2010(STK-10-00181) and with the HEI-CRA <br /> subcontractor agreement. <br /> Backgkgound <br /> On September 24,2009, HEI completed a soil sampling program at the John Deere Parts Depot <br /> located at the intersection of South Airport Way and Industrial Boulevard in Stockton, <br /> California (Site- Figure 1). At the time, the Site contained a soil stockpile of approximately 25 <br /> cubic,yards(cu yds) situated near the northwestern corner of the Site. As part of their soil <br /> sampling program, HEI collected soil samples from the stockpile and analyzed them for volatile <br /> organic compounds. The analytical data indicated that the stockpiled soils contained relatively <br /> low concentrations of methylene chloride. In order to prepare the Site for the pending sale, HEI <br /> rcco_—ancnded removal of the stockpile. <br /> During the soil sampling effort,HEI also identified an area with distressed vegetation and soil <br /> staining along the western fence line. This area was delineated by HEI's soil sample locations <br /> B-S, B-M and B-N and was approximately 400 feet in length. HEI recommended that the top two <br /> to three inches of soil be removed in this western boundary area. <br /> Employment ISQ 8001 <br /> OYDartwrty FmDlYYer ,_ <br /> Worldwide Eegineering, Environmental,Conatmetion,�and IT Services <br />